U s u la n T e kn i s PT BERMUDA KONSULTAN
PENDEKATAN, PENDEKATAN, METODOLOGI DAN PROGRAM KERJA BAB E
E.1
DATA ORGANISASI PERUSAHAAN
PENDEKATAN dan METODOLOGI “Perencanaan Teknik/DED Longsoran Tersebar di Provinsi Gorontalo” merupakan merupakan
pekerjaan perencanaan teknis penanggulangan longsoran, yang akan dijadikan sebagai Acuan untuk tahapan penanganan longsoran yang diharapkan mampu menghindari terjadinya longsoran pada badan jalan yang akan mengakibatkan terputusnya badan jalan secara tiba-tiba dan membuat pelayanan transportasi menjadi lumpuh. Keberhasilan dalam penanggulangan longsoran tergantung kepada banyak hal, di antaranya keakuratan data hasil penyelidikan, ketajaman dalam mengidentifikasi penyebab longsoran dan menemukan pola bidang gelincir, pemilihan analisis kestabilan lereng serta opsi penanggulangan yang tepat. Acuan Teknis yang digunakan dalam kegiatan perencanaan ini adalah : a. Petunjuk Teknis Perencanaan Penanganan Longsoran (Tahun 2000) b. Tata Cara Identifikasi Awal di Daerah Longsoran (Pedoman Tahun 2002) c. Manual Penanganan Lereng Jalan No. 02/BM/2005 d. Standar Penguatan Tebing No. 011/T/BNKT/1991 e. Pedoman Perencanaan Drainase Jalan Pd.T.02-2006-B (Pedoman Tahun 2006) f. Rujukan dan Literatur Teknis lainnya yang disetujui penggunaannya oleh Pengguna Jasa. Metodologi perencanaan penanganan longsoran yang diuraikan di sini adalahSurvei pendahuluan, Surveidetail (survei topografi, survei hidrologi, surveigeoteknik, penyaringan lingkungan, survei untilitas), Pengujian di Laboratorium dan perencanaan detail(perencanaan penanggulangan longsoran, perncanaan drainase dan utilitas, perncanaan bangunan pelengkap) dengantahapan kegiatan sebagaimana ditunjukkan pada gambar di bawah ini. PERENCANAAN TEKNIK/DED LONGSORAN TERSEBAR PROVINSI GORONTALO TAHUN ANGGARAN 2014
E-1
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Usulan Teknis PT BERMUDA KONSULTAN
1.
TAHAP PENDAHULUAN
1.1 PERSIAPAN • • • • •
Mobilisasi Koordinasi & Konfirmasi Inventarisasi Data Awal Peta Topografi Peta Geologi
2. TAHAP ANTARA
3. TAHAP AKHIR 3.1 ANALISIS
2.1 SURVEIDETAIL SURVEI INVENTARISASI KONDISI EKSISTING
3.2 PENYIAPAN GAMBARRENCANA DAN SPESIFIKASI TEKNIS
PERENCANAAN PENANGANAN/ PENANGGULANGAN LONGSORAN
PENYELIDIKAN TANAH& GEOLISTRIK
3.4. PENYIAPAN DOKUMENLELANG DAN LAPORAN-LAPORAN
3.3 PERHITUNGAN KUANTITAS DAN ANALISA HARGA SATUAN
PERENCANAANTEKNIS DRAINASE & UTILITAS
1.2 SURVEY PENDAHULUAN •
• • •
•
• •
Koordinasi dengan Instansi Terkait Pengumpulan Data Sekunder PengamatanVisual MenentukanInstrumeninstrumen Penyelidikan Tanah Menentukan Awal & Akhir Rencana Pekerjaan Diskusi Perencanaan di Lapangan Dokumentasi foto dan video
PENGUKURANTOPOGRAFI DAERAHLONGSORAN PERENCANAAN BANGUNANPELENGKAP
SURVEI HIDROLOGI & HIDROGEOLOGI
PENYARINAGAN LINGKUNGAN
PENYIAPAN GAMBAR RENCANA PENYIAPAN DAFTAR KUANTITAS DAN HARGA(BOQ)
SURVEIUTILITAS
R A B M A G I K I A B R E P
2.2 PENYUSUNAN KONSEP PERENCANAAN PENANGANANLONGSORAN
2.3 PENYUSUNAN PRA-RANCANGAN PENANGANANLONGSORAN
BENAR
Disetujui Pengguna Jasa?
YA
PERHITUNGAN KUANTITAS PEKERJAAN
CHECK. Disetuji?
1. LAPORAN AKHIR CHECK
2. RINGKASAN EKSEKUTIF TIDAK
TIDAK
PENYIAPAN DOKUMENLELANG
PERBAIKI
SALAH
3. GAMBAR RENCANA
YA
PERHITUNGAN PERKIRAAN BIAYA PROYEK (ENGINEER'S ESTIMATE)
PERHITUNGAN / ANALISA HARGA SATUAN
I K I A B R E P
PENYUSUNAN SPESIFIKASITEKNIS
CHECK, Disetujui ?
4. CD/BACKUPDATA
YA
TIDAK TIDAK
YA
CHECK. Disetuji ?
LAPORANBULANAN
DRAFT LAPORAN PENDAHULUAN
DRAFT LAPORAN ANTARA
DRAFT GAMBAR RENCANA
DRAFT KUANTITAS DAN PERKIRAAN BIAYA
KONSEP LAPORAN AKHIR PRESENTASI
PRESENTASI PRESENTASI
PERSETUJUAN OLEH PIHAK PENGGUNA JASA
LAPORAN PENDAHULUAN
LAPORAN SURVEI
GAMBARPERENCANAAN
PERHITUNGAN KUANTITAS DAN PERKIRAAN BIAYA (EE)
DOKUMEN LELANG
LAPORAN ANTARA LAPORAN AKHIR, CD & EXECUTIVE REPORT
Gambar E.1 Kerangka Kegiatan Perencanaan Teknik/DED Longsoran Tersebar di Provinsi Gorontalo
PERENCANAAN TEKNIK/DED LONGSORAN TERSEBAR PROVINSI GORONTALO TAHUN ANGGARAN 2014
E-2
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a. Persiapan
Data-data yang disiapkan oleh penyedia jasa pada tahap persiapan, adalah datadata yang merepresentasikan kondisi kawasan obyek lokasi penyelidikan mencakup: 1. Peta topografi, skala 1 : 50.000 atau skala yang lebih besar 2. Peta geologi, skala 1 : 50.000 atau atau skala yang lebih besar besar 3. Peta tata guna lahan 4. Peta kerentanan tanah 5. Peta kegempaaan 6. Data curah hujan 7. Laporan terdahulu dan data-data lain yang terkait atau relevan dengan obyek lokasi penyelidikan. Data-data tersebut diperlukan sebagai bahan masukan untuk mengetahui gambaran umum kondisi yang ada ( existing ) disekitar kawasan obyek lokasi penyelidikan lapangan, dan dapat juga difungsikan sebagai data pembanding pada Survei Pendahuluan dan penyelidikan terinci. b. Survei Pendahuluan
Survei pendahuluan yang harus dilaksanakan oleh Konsultan sebagai penyedia jasa adalah dalam rangka menentukan penyelidikan tanah dan penelitian lainnya yang perlu dilakukan melalui pengamatan visual dan rencana investigasi lapangan dengan tujuan untuk mengkonfirmasikan kondisi
lapangan
dengan
data-data
pendukung
yang
ada,
serta
menentukan jenis, lokasi dan jumlah sampel penyelidikan terinci yang akan dilaksanakan. Dalam tahap ini kegiatan-kegiatan yang dilakukan antara lain : 1. Pengamatan visual (lokasi, ciri, jenis, penyebab longsoran), 2. Menentukan instrumen-instrumen penyelidikan tanah yang diperlukan.
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Arahan kebutuhan instrumen penyelidikan tanah tersebut, dan relevansi penggunaannya terhadap jenis material yang menjadi obyek penyelidikan, dapat mengacu pada tabel berikut ini. Tujuan Pengamatan
Gerakan di Permukaan Gerakan di Bawah Permukaan Beban dan Tekanan
Material Tanah Batu
Instrumen
1. 2. 1. 2. 3. 4. 1. 2.
Patok Geser Stainmeter Inklinometer Deflektometer Shear Strip Indicator Acoustical Emission Pisometer Strainmeter
ya ya ya tidak ya ya ya tidak
ya ya ya ya ya ya ya ya
Keterangan : ya = diperlukan Tidak = tidak diperlukan
c. Survei Penyelidikan Tanah
1. Persiapan Data-data yang disiapkan oleh Konsultan/penyedia jasa pada tahap persiapan,adalah
data-data
yang
dihasilkan
dari
kegiatan penyelidikan
pendahuluan, antara lain berupa : a) Sketsa dan detail lokasi b) Karakteristik geologi teknik c) Karakteristik umum tanah d) Sampel kondisi terganggu ( disturb sample) e) Rencana penyelidikan terinci (jenis, lokasi, jumlah sampel dan instrumentasi f) Potensi longsor (penyebab, arah, kedalaman, intensitas keaktifan) Penanganan lereng di sekitarnya Data-data tersebut dapat dijadikan sebagai bahan masukan dan Pertimbangan dalam menentukan arahan penanganan perencanaan.
lereng/longsoran
dalam
proses
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2. Penyelidikan tanah terinci Penyelidikan terinci terhadap kondisi, sifat fisik dan sifat teknis tanah, dimaksudkan untuk mendapatkan rincian data kuantitatif dari lapangan dan laboratorium, sehingga dapat dibuat pemetaan geologi dan pendugaan geofisika di daerah longsoran atau yang berpotensi longsor, atau
untuk
dijadikan
parameter
sebagai
perencanaan
salah
(engineering
satu
bahan
properties )
masukan,
dan
lereng
jalan
yang bersangkutan. a) Penyelidikan Lapangan Jenis Penyelidikan Jenis penyelidikan lapangan yang diperlukan dalam rangka penyelidikan tanah terinci, antara lain : 1) Pengeboran mesin dan pengambilan sampel/contoh 2) Standard Penetration Test (SPT) 3) Geolistrik Standar Rujukan Standar
rujukan
untuk
pelaksanaan
penyelidikan
tanah
di
lapangan, mencakup metode, prosedur dan instrumentasi, harus merujuk pada Standar Nasional Indonesia atau Standar lainnya yang disetujui oleh pengguna jasa Data hasil penyelidikan Data yang diharapkan dari hasil penyelidikan tanah rinci di lapangan, antara lain : 1) Sampel tanah tidak terganggu (undisturb sample) 2) Sampel tanah terganggu (disturb sample) 3) Kondisi fisik lapisan tanah 4) Karakteristik tanah 5) Kuat Geser Tanah
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Syarat-syarat pelaksanaan pengeboran mesin dan cara-cara pengambilan contoh di lapangan, adalah sebagai berikut :
1) Setiap lokasi longsoran/yang berpotensi longsor, pengeboran yang digerakan dengan mesin (bor mesin) harus dilaksanakan paling sedikit pada 3 (tiga) titik/lokasi yang berbeda, dan dianggap mewakili kondisi di lapangan untuk keperluan pekerjaan perencanaan ini. 2) Boring dengan alat bor yang digerakan dengan mesin, harus mampu mencapai kedalaman yang ditentukan atau setelah didapat informasi yang cukup mengenai letak lapisan tanah keras, jenis batuan dan tebalnya. 3) Jika sebelum mencapai kedalaman yang ditentukan telah ditemukan lapisan tanah keras/batu; boring harus diteruskan menembus lapisan keras ini sedalam kurang lebih 5 meter lagi (tergantung jenis batuannya dan perkiraan beban bangunan bangunan sub strukturnya). 4) Mata bor harus mempunyai diameter cukup besar sehingga undisturbed sample yang diinginkan dapat diambil dengan baik. 5) Untuk tanah lempung ( clay ),), lanau (silt ) atau tanah lainnya yang tidak terlalu padat, dapat dipakai “steel bit” sebagai mata bor.
6) Untuk lapisan yang keras (batuan)
atau
cemented harus dipakai
“double tube core barrel” sehingga dapat diambil
undisturbed samplenya
(contoh inti batuan) dari lapisan keras tersebut. 7) Setelah diambil dari lubang bor, contoh contoh inti batuan harus dibungkus dibungkus dulu dengan plastik, kertas semen dan ditempatkan pada kotak kayu yang diberi penyekat, diberi label serta disusun secara berurutan sesuai dengan urutan pengambilan contoh dari dalam lubang bor. 8) Kemudian contoh inti batuan disiram parafin cair sampai penuh agar jangan sampai rusak dalam pengangkutan. Apabila ada bagian contoh yang tidak terambil maka harus diberi tanda, sehingga urutan-urutan secara keseluruhan tidak terputus. Pada bagian luar dan dalam tutup peti
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yang diketam setebal 12,5 mm, ukuran kotak 1,00 m x 0,50 m x 0,10 m dan berisi satu lapis contoh. Penyekat harus dari kayu setebal - 10 mm. 9) Pada setiap interval kedalaman 1,50 meter harus dilakukan Standard Penetration Test (SPT) menurut acuan teknis Standar
Nasional
Indonesia atau standar lainnya yang disetujui oleh Pengguna Jasa dan harus diambil contoh tanahnya (Split Spoon Sampler ),), disimpan dalam tempat yang dapat menjaga kadar air air aslinya. Contoh Contoh tanah tersebut diperlukan untuk menyusun lithologie description lapisan tanah. 10) Pada setiap interval kedalaman yang ditentukan (bila tidak ditentukan lain maka rata-rata diambil kurang lebih 3,00 meter) pada tanah tanah lunak harus diambil undisturbed sample untuk test di laboratorium guna mendapat harga index dan struktural properties lapisan tanah. 11) Undisturbed sample harus diambil dengan cara sebagaiberikut :
Tabung sample (yang dibuat dari baja tipis tetapi keras dan berbentuk silinder dengan diameter rata-rata 7 cm, panjang 70 cm) dimasukkan ke dalam tanah pada kedalaman dimana undisturbed
sample
akan diambil kemudian ditekan perlahan-lahan sehingga tabung tersebut dapat penuh terisi tanah. 12) Setelah dikeluarkan dikeluarkan dari dalam lubang lubang bor, tabung yang yang berisi contoh tanah undisturbed tersebut harus segera ditutup dengan parafin. 13) Tanah dimaksud harus tetap berada dalam tabung sample tersebut sampai saatnya ditest di laboratorium. Hasil boring harus dibuat bor log paling
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16) Pekerjaan pengambilan contoh tanah bertujuan untuk penelitian lebih lanjut di laboratorium. 17) Pengambilan contoh tanah ini harus diatur sedemikian rupa hingga setiap jenis lapisan tanah harus harus terwakili. 18) Bilamana lokasi dan kondisinya tidak dapat dilakukan pemboran dengan bor mesin, maka pemboran dapat diganti dengan cara enyelidikan yang lain setelah mendapat persetujuan
dari
Pengguna
Jasa/Pejabat
Pembuat Komitmen. 19) Untuk tanda telah dilaksanakannya pekerjaan bor ini, maka pada setiap bekas lubang bor harus dimasukkan pipa paralon sepanjang 1,00 m yang tertutup pada bagian atasnya. Ukuran pipa tersebut disesuaikan dengan ukuran lubang bor sedemikian rupa agar pipa tersebut tidak meluncur ke awah lubang dan tertanam ± 0,80 m di bawah permukaan tanah sekitar lubang bor dan difoto. Penyelidikan Geolistrik 1) Metoda penyelidikan Geolistrik Penyelidikan
yang
dilakukan
dengan
metoda
Vertical Elektric
Sounding . Ketentuan yang diterapkan dalam penyelidikan Geolistrik
bahwa nilai tahanan jenis tertentu menunjukkan batuan atau lapisan batuan tertentu pula, baik dipermukaan maupun di bawah permukaan. 2) Bidang gelincir (batas antara daerah yang stabil dan daerah yang bergerak) ditandai oleh berbagai kondisi geologi yang dijumpai disekitar
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4) Interval
deteksi
maksimum 100 cm,
dapat
dilakukan
secara
antara 20 cm, 50 cm, sampai
menerus
tergantungkondisi penyebaran
tanah dan batuannya. 5) Metode Penempatan Elektroda Penempatan elektoda bebas dilakukan, dapat menggunakan metode Wenner, Slumberger dan sebagainya. Penyelidikan yang dilakukan
dilapangan
dengan
menggunakan
cara Wenner yaitu dengan penempatan elektroda sebagai berikut : Letakkan posisi elektroda Potensial (P) pada jarak setengah kedalaman deteksi yang direncanakan, kemudian letakkan elektroda arus (C) pada jarak 3 x 0,5 kedalaman deteksi, semua dihitung dan pusat (0) titik duga (R). Untuk lebih jelasnya elektroda dipasang di atas tanah dengan jarak d (lihat gambar di bawah). Pasangan yang kedua ditempatkan pada garis yang sama dan juga juga berjarak d dari pasangan elektroda yang pertama. pertama. Penurunan voltase diukur bersama dengan arus (i) yang dibangkitkan oleh catu daya. Asumsi
yang
dibuat
adalah
bahwa
penurunan
voltase
berada
di dalam suatu volume tanah berbentuk bola dengan jari-jari sehingga
tahanannya
dapat
dihitung
(Graffis
yaitu: = 2. . .
dan
King,1965),
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Gambar E.2 Skema Umum Pengukuran Resistivitas Voltase
baterai
bolak-balik,
(atau
kecuali
lainnya)
kalau
polarisasi (ion-ion H +
yang
harus
suatu
diubah
cara
tertarik
untuk
kepada
menjadi
arus
menghindarkan katoda) elektroda
diadakan. Dalampenentuanlokasilapisanvertikal, jarak antara elektroda diperpanjang dan jarak awal dengan pertambahan panjang yang konstan (misalnya 0.5 :1.0 atau 1.50 m) seperti diperlihatkan gambar di atas. Untuk menentukan tanah,
jarak
lokasi
antara
batuan
yang
elektroda
dangkal
dipertahankan
atau dan
muka
air
keempat
elektroda dipasang pada beberapa titik yang membentuk kisi-kisi permukaan. Hasilnya dibentuk dalam peta kontur resistivitas untuk mengindentifikasi areal yang diinginkan. 6) Peralatan yang digunakan Untuk adalah
cara
Wenner
''Specific
alat
Earth
yang
praktis
Resistivity
pengoperasiannya
Yokogawa "
dengan
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7) Metode Interpretasi Pengolahan
data
lapangan
dilakukan
berdasarkan
metode
yaitu: i.
Curva Matching Method
Dengan menggunakan susunan elektroda aturan Wenner, maka didapat nilai tahanan jenis berdasarkan rumus sebagai berikut:
= 2. .
Dimana : ρa = Hambatan jenis semu 2π = Konstanta
R = Hambatan Hambatan yang terbaca pada alat A = Jarak elektroda Data pengamatan lapangan setelah dihitung menjadi Pa. Dibuat lengkung pada lembar log ganda. Untuk selanjutnya lengkung duga lapangan tersebut ditafsirkan dengan menggunakan "Standar Curva" dan "Auxelery Curva". Hasil penafsiran ini mencerminkan batas-batas lapisan tanah/ batuan di bawah permukaan. ii.
More Commulative Method
Sebagai
pendekatan
dalam
melakukan
penentuan
batas-
batas perubahan lapisan tanah dan batuan di daerah ini digunakan
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iii.
More Commulative Method
Dalam melakukan identifikasi perilaku macam/ jenis tanah atau batuan yang digunakan parameter pendukung dalam menelusuri letak dan penyebaran bidang gelincir dalam titik duga dimanfaatkan grafik linier dari nilai tahanan jenis kelistrikan yang sebenarnya.
8) Hasil Pendugaan Geolistrik Beberapa metode interpolasi tersebut di atas ditambah data yang memperlihatkan
keadaan
geologi
serta
paradigma konfiguran
stratigrafi daerah sekitarnya, maka diperoleh jenis susunan lapisan tanah (batuan, muka air tanah dan kedalaman bidang gelincir pada zona longsoran.
9) Kuantitas Penelitian Geolistrik Untuk geolistrik
setiap
lokasi
longsoran
minimal 5 (lima)
titik
yang
diselidiki,
tergantung
penelitian
panjang pendeknya
longsoran yang yang ada. Dengan uraian 3 (tiga) (tiga) titik pada poros longsoran longsoran dan 2 (dua) titik sejajar sumbu jalan sekitar zona longsoran.
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Tabel E.1Macam pengujian laboratorium dan aplikasinya
Macam Pengujian 1. Berat isi
Tanah Batuan Berkohesi Tak Berkohesi o o o
2. Kadar air
o
o
o
3. Batas – batas Atterberg
o
-
-
4. Batas susut
o
-
-
5. Kepadatan relatip
-
o
-
6. Analisis butir
o
o
-
7. Mineralogi
o
-
o
Aplikasi S I F A T F I S I K
Perhitungan tekanan Klasifikasi dan konsistensi Klasifikasi dan korelasi sifat – sifat tanah Potensi pengembangan Pemadatan Klasifikasi, taksiran kelulusan disain filter dll Identifikasi
8. Kelekangan (Durability )
-
-
o Identifikasi
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Standar Rujukan Standar rujukan untuk pelaksanaan pengujian tanah di laboratorium, mencakup metode, prosedur dan instrumentasi pengujian laboratorium, antara lain : SNI 03-3422-1944 Metoda Pengujian Analisis Ukuran Butir Tanah dengan (AASHTO T88-90) Alat hidrometer SNI 03-1967-1990 (AASHTO T89-90)
Metoda Pengujian Batas Cair dengan Alat Casagrande
SNI 03-1966-1990 (AASHTO T90-87)
Metoda Pengujian Batas Plastis
SNI 03-1742-1989 (AASHTO T99-90)
Metoda Pengujian Kepadatan Ringan untuk Tanah
SNI 03-1742-1989 (AASHTO T99-90)
Metoda Pengujian Kepadatan Berat untuk Tanah
SNI 03-1744-1989 Metode Pengujian CBR Laboratorium (AASHTO T193-81)
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d. Survei Topografi Daerah Longsoran
Tujuan pengukuran topografi
dalam
pekerjaan
ini
adalahmengumpulkan
data koordinat dan ketinggian permukaan tanah pada daerah longsoran/yang berpotensi longsor untuk penyiapan/pembuatan peta topografi. Pengukuran tersebut meliputi: -
Pengukuran titik kontrol horizontal dan vertikal (koordinat & elevasi)
-
Pengukuran situasi longsoran dan sekitarnya / daerah investigasi.
-
Pengukuran penampang memanjang dan melintang
-
Perhitungan dan penggambaran peta situasi dengan Auto Cad.
1. Daerah yang diukur Disesuaikan dengan dimensi longsorannya, sebagai arahan sementaradapat digunakan hal-hal sebagai berikut : -
100 meter masing-masing ke arah kiri dan kanan sejajar sumbu jalan dihitung dari perkiraan
titik pusat lokasi
longsoran/berpotensi longsoran/berpotensi
longsor. -
250 meter masing-masing ke arah kiri dan kanan jalan/arah melintang dari sumbu jalan dihitung dari perkiraan titik pusat lokasi longsoran/
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Titik kontrol Vertikal Pengukuran ini dimaksudkan untuk mendapatkan ketinggian/elevasi permukaan tanah atau obyek yang diukur. Pengukuran ketinggian dilakukan dengan double stand atau 2 kali berdiri alat. Alat yang digunakan adalah Waterpas orde II. 3. Pengukuran penampang memanjang Pengukuran penampang memanjang adalah pengukuran sejajar sumbu jalan yang ada, diukur diukur setiap jarak 10 meter. meter. Alat yang digunakan Theodolit Total station atau setingkat. Penggambaran Penggambaran di atas kertas ukuran A3 dengan dengan skala horizontal 1:500, vertikal vertikal 1:50. 4. Pengukuran penampang melintang Pengukuran
penampang
melintang
adalah
pengukuran
tegak
lurus
sumbu jalan, diukur setiap jarak 10 meter. Titik yang perlu diperhatikan adalah tepi perkerasan, tepi bahu, bagian atas dan dasar selokan, saluran irigasi (jika ada) dan lain-lain yang dianggap perlu. Alat
yang
digunakan
Theodolit Total
Station
atau setingkat.
Penggambaran di atas kertas dengan skala horizontal 1:100, vertikal
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Setiap BM harus memiliki koordinat (X, Y, Z) yang diperoleh dengan menggunakan alat GPS (Geografic (Geografic Position System). Jumlah patok beton (BM) minimal 2 (dua) buah untuk setiap lokasi yang ditangani. 6. Koreksi alat Sebelum alat ukur tersebut digunakan harus dikoreksi terlebih dahulu: - sumbu I vertikal, dengan koreksi nivo kotak & nivo nivo tabung. - sumbu II tegak lurus sumbu I - garis bidik tegak lurus sumbu II - kesalahan kolimasi horizontal = 0 - kesalahan index vertikal = 0
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bisa diperoleh dari Badan Meteorologi Meteorologi dan Geofisika dan/atau instansi terkait di kota terdekat dari lokasi lokasi pekerjaan pekerjaan perencanaan perencanaan ini. 2. Mengumpulkan data bangunan pengaman yang ada, seperti gorong- gorong, jembatan, selokan yang meliputi: lokasi, dimensi, kondisi,tinggi muka air banjir. 3. Mengidentifikasi dan menganalisis perilaku air bawah tanah dan pelapisan tanah hubungannya dengan aliran air tanah. 4. Menganalisis
data
curah
hujan
dan
menentukan
curah
hujan
rencana, debit dan tinggi muka air banjir rencana dengan periode ulang 25 tahunan untuk jalan arteri, dan
10 tahun untuk jalan kolektor.
5. Menganalisa pola aliran air pada daerah rencana untuk memberikan
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g. Perencanaan Teknis Penanganan/Penanggulangan Longsoran
1. Dasar Perencanaan Perencanaan Perencanaan teknis penanganan/penanggulangan longsoran pada/terhadap badan jalanmerupakanupayauntukmemperbaiki/m jalanmerupakanupayaunt ukmemperbaiki/menstabilkan enstabilkan lereng yang umumnya dapat ditinjau terhadap parameter-parameter parameter-parameter stabilitas lereng, Stabilitas kemiringan lereng ditentukan berdasarkan batasan angka keamanan minimal mi nimal yang menjamin kestabilan k estabilan terhadap t erhadap potensi p otensi longsor pada bidang gelincirnya. gelincirnya. 2. Aspek yang Harus dipertimbangkan penanggulangan penanggulangan longsoran badan jalan, mencakup aspek-aspek sebagai berikut :
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Kelas Jalan
Beban lalulintas
Beban diluar jalan
(kPa)
(kPa)
I
15
10
II
12
10
III
12
10
(*)
Keterangan :(*) Beban dari bangunan rumah-rumah rumah-rumah sekitar lereng
Pengaruh beban gempa diikutsertakan jika lereng longsoran berada pada area bangunan dengan kepentingan yang strategis. Penentuan data zona gempa terbaru yang digunakan dalam perencanaan di Indonesia dapat mengacu pada SNI-T14-1990-03. Dalam standar tersebut disebutkan bahwa percepatan gempa diperoleh dengan menghubungkan zona gempa dengan tipe tanahnya serta frekuensi dasar ( fundamental frequency )
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kategori diperlihatkan di dalamTabel dalamTabel E.4Perlu E.4Perlu ditekankan bahwa faktor keamanan terhadap resiko kehilangan secara ekonomi dan contoh tipikal dari keruntuhan lereng dalam setiap resiko kehilangan secara ekonomi hanyalah sebagai tuntunan belaka. Peristiwa keruntuhan ini hanya merupakan pernyataan umum dan tidak mencakup setiap peristiwa keruntuhan lereng. Sangatlah penting penting bahwa seorang seorang perencana perencana memilih suatu suatu keseimbangan yang dapat diterima antara kehilangan secara ekonomi yang berpotensi terjadi pada setiap kejadian keruntuhan lereng dan jumlah biaya konstruksi yang akan bertambah untuk memperoleh nilai faktor keamanan yang lebih besar. Keruntuhan lereng yang termasuk ke dalam kategori „beresiko tinggi
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Resiko terhadap nyawa manusia Resiko Ekonomis r a o r t p a k a c a e f d s i a n h a s l a i i r e g m n t n o i a n s n l a a i o h d n e k e n a e m k o a m o e k
Diabaikan Rendah Tinggi
Rekomendasi nilai faktor keamanan terhadap resiko kehilangan nyawa manusia Diabaikan Rendah Tinggi 1.1
1.2
1.5
1.2
1.2
1.5
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bis, stasion pengisian bahan bakar). (7) Keruntuhan berpengaruh pada bangunan-bangunan yang sedang digunakan (misalnya area permukiman, area pendidikan, area komersial, area perindustrian). (8) Keruntuhan berpengaruh pada bangunan-bangunan yang menyimpan bahan-bahan berbahaya.
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Secara umum tahapan analisis kestabilan lereng adalah evaluasi dan interpretasi parameter hasil investigasi, penentuan stratifikasi lereng, penentuan tipe bidang gelincir dan pemilihan metode analisis, penentuan parameter desain/analisis, serta analisis stabilitas kondisi lereng dengan dan tanpa penanganan. Untuk lebih jelasnya lihat gambar dibawah ini.
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Tahapan ini menjelaskan menjelaskan evaluasi kondisi detail topografi, geologi, kekuatan geser, kondisi muka air dan beban-beban eksternal yang dibutuhkan untuk analisis stabilitas lereng. a) Topografi Data „site plan‟ yang akurat harus memperlihatkan posisi dari titik uji
(bor, sondir, geolistrik dll.), area retakan, area lokasi kekar, juga lokasi
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Kedalaman pelapukan, adanya lapisan colluvium atau timbunan serta adanya struktur yang segar dan batuan yang mengalami pelapukan harus diketahui dari hasil penyelidikan pada permukaan dan dalam tanah. Untuk kebutuhan analisis, data geologi harus diinterpretasikan secara normal pada kondisi pelapisan atau per-zona material dengan karakteristik teknis yang memiliki kemiripan dalam bentuk peta geolgi
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demikian, kondisi yang mendekati jenuh dapat dicapai pada kondisi
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pada massa batuan akan bervariasi, tekanan yang terukur oleh
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Stratifikasi penampang lereng dibuat pada sepanjang as longsoran atau
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Penentuan tipe bidang gelincir sangat penting sekali dalam tahapan analisis
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longsoran dari titik titik penyelidikan diperoleh. Dengan demikian,
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terhadap tarik dan geser yang terjadi yang akan mempengaruhi pasak. Besaran dari gaya-gaya ini tergantung dari kekasaran pada bidang diskontinuitas, orientasi dari pasak terhadap diskontinuitas dan momen relatif, diperlukan untuk membentuk kekuatan geser puncak dan perluasan puncak. Simplifikasi metode desain pasak baja diberikan oleh Sage (1977) dan Bjurstrom (1974). Untuk pasak baja dengan tingkat kelelehan sedang dan tinggi, tegangan maksimum harus dibatasi hingga 50% dari kekuatan regang batas yang digaransikan. Kelebihan ketebalan hingga 2 mm diijinkan untuk mengantisipasi efek korosi, penambahan grouting hingga 6 mm harus tersedia di sekeliling batang baja tersebut. Tidak diharuskan untuk menggunakan baja prestress untuk pasak kecuali bila telah tersedia perlindungan perlindungan ganda terhadap korosi.
Baut batuan (rock bolt ) Baut batuan sangat cocok untuk menstabilkan area tertentu tapi tidak digunakan sebagai sistem penahan utama. Secara umum terdiri dari batangan baja berkekuatan tarik yang terdiri dari zona pengangkeran yang pendek ke dalam batuan yang aman dan zona yang tidak terikat dimana gaya tarik akan terbentuk yang diaplikasikan pada suatu sistem seperti dongkrak. Beban yang terbentuk diterapkan pada bagian muka oleh pendukung pelat baja menuju permukaan batuan, walaupun untuk batuan yang lemah atau batuan yang memiliki banyak celah yang sangat parah maka diperlukan juga tambahan dudukan beton. Baut batuan secara tipikal berukuran diameter 25 mm hingga 40 mm dan panjang 3 meter hingga 6 meter serta memiliki kemampuan menahan tarik hingga beban 100 kN.
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Baut batuan
Gambar E.23Aplikasi Baut Batuan
Baut batuan menyediakan daya dukung positif terhadap bidang kontinuitas yang akan distabilisasi dengan cara meningkatkan tegangan normal dan juga dengan memobilisasi memobilisasi kekuatan geser. Baut diangkerkan ke dalam batuan yang kuat, dengan suatu pengikatan atau dengan menggunakan peralatan mekanis seperti „torque-set bolt‟. Panjang pengikatan harus didesain dengan nilai
faktor keamanan terhadap tarik (pullout) sebesar 2. Pengangkeran secara mekanis, biasa digunakan untuk baut permanen, harus di grouting setelah instalasi awal untuk menyediakan panjang pengikatan yang sesuai. Tekanan hingga 50% dari daya regang batas yang digaransikan,boleh digunakan, dan baut harus tahan terhadap pembebanan hingga 1,5 kali beban kerja, untuk memperlihatkan perfomance yang mencukupi pada saat memasang baut. Jika baja prestressed digunakan sebagai baut batuan, maka baja tersebut harus dilengkapi perlindungan ganda terhadap efek korosi. Perlindungan korosi tunggal dipertimbangkan akan mencukupi untuk dengan tingkat kelelehan tinggi (high yield ) atau tingkat kelelehan sedang, tambahkan ketebalan sekitar 2 mm terhadap diameternya untuk mengaktisipasi mengaktisi pasi efek korosi.
Untuk baut permanen,
perlindungan korosi tunggal pada panjang yang bebas harus terdiri
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dari grout dengan semacam pembungkus berpelumas atau metode perlindungan lain yang sesuai. Perlindungan terhadap korosi pada bagian kepala baut harus dipertimbangkan dengan hati-hati dan kualitas dari pelindung yang tersedia harus tetap konsisten dengan bagian lainnya dari baut tersebut. Perhatian khusus khusus harus harus diterapkan pada detail sistem perlindungan korosi dan lakukan supervisi di lokasi pekerjaan untuk memastikan bahwa resiko timbul akibat korosi telah diminimalkan. Jika metode grouting yang digunakan, sediakan penutup tambahan sekitar minimal 6 mm pada baut tersebut. Pada lokasi dimana terjadi diskontinuitas secara terus menerus, semacam pengikat mungkin dibutuhkan diantara tiap baut batuan untuk mencegah mencegah keruntuhan. Pengikat ini dapat berupa saluransaluran struktural dengan menempatkan lubang yang dipotong untuk mengakomodasi mengakomodasi variasi dari jarak antara setiap baut atau alternatif lain bisa berupa balok beton yang dicor di tempat. Beban yang diperlukan dalam baut batuan untuk mencegah longsornya blok pada bidang yang cenderung mendaki dapat dihitung berdasarkan referensi dari Appendiks 3 dari Hoek & Bray (1981). Kekuatan geser yang digunakan dalam perhitungan beban dari baut harus sesuai dengan joint yang akan distabilkan.
Kontrol terhadap boulder dan reruntuhan bebatuan Ketika boulder yang tidak stabil teridentifikasi, yang menjadi ancaman terhadap pembangunan dilakukan pada bagian bawah lereng, ada beberapa perbaikan yang dilakukan untuk memperbaiki stabilitas sebagai berikut :
Pindahkan boulder Sebelum pembangunan dilaksanakan pada dasar dari lereng yang
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dipindahkan atau jika terlalu besar, boulder dipecahkan dengan cara diledakkan atau cara mekanis lain yang menyertainya.
Pecahkan boulder dan relokasikan ke tempat lain Jika memindahkan boulder ke tempat lain menjadi tidak ekonomis, pecahkan boulder menjadi ukuran yang lebih kecil di tempat, dan sebarkan di sekitar lereng, hal ini bisa menjadi pemecahan dari masalah ini.
Stabilisasi boulder insitu Berbagai macam teknik tersedia termasuk metode „concrete underpinning‟, penyuntikan grouting, pasak baja dan baut
batuan, pengikatan balik dengan kombinasi penggunaan jaring baja dan penyemprotan beton atau dengan semacam kabel baja, dan perlindungan permukaan yang dikombinasikan dengan sistem drainase untuk mencegah erosi pada tanah penahan di sekitar boulder. Akan menjadi tidak praktis secara ekonomis untuk menghilangkan semua batuan dan boulder yang jatuh dari lereng galian atau lereng alami yang curam. Pada situasi seperti ini, perhatian harus lebih seksama untuk menurunkan bahaya dari keruntuhan yang muncul terhadap jiwa manusia dan properti di sekitar lereng. Gambar E.24 memperlihatkan metode untuk mengontrol runtuhan batuan yang disarankan oleh Fookes & Sweeney (1976).
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Jaring-jaring kawat yang tergantung
Jaring-jaring kawat yang
bebas ditahan pada bagian atasnya
tergantung atau rantai untuk menahan blok batuan dari atas
Bench yang berfungsi sebagai pengumpul reruntuhan
Penahan berupa
batuan
angker pada batuan atau berupa dearen
Pindahkan struktur Blok-blok batu lepas yang akan
bangunan pada suatu jarak yang
dilepaskan dari permukaan tanpa
aman
dipasang jaring.
Tanda/rambu peringatan
Pagar atau semacam
Saluran penangkap batuan
dinding penahan Alas yang merupakan lapisan kerikil
Gambar E.24Tindakan yang dapat dilakukan Sebagai Kontrol Terhadap Batuan yang Runtuh
Relokasi Cara ini dilakukan dengan memindahkan bangunan misalnya jalan, saluran air dan pemukiman ke tempat yang lebih aman. Penanggulangan dengan cara ini baru digunakan bila cara –cara lain tidak memungkinkan lagi. Penanganan cara ini hanya boleh digunakan bila dapat merupakan penangulangan permanen. Relokasi ini dapat dilakukan ke arah mendatar atau tegak (lihat (lihatGambar E.25). Penanggulangan Penanggulangan ini harus memperhatikan hal – hal berikut :
Lokasi yang disarankan tidak akan menimbulkan problema baru dari sudut ketinggian, drainase dan sebagainya. sebagainya.
Lokasi di atas atau di bawah lokasi yang direncanakan cukup mantap, atau tidak akan menimbulkan masalah ketidakmantapan baru.
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Bila cara penanggulangan lainnya sudah tidak mungkin secara teknik atau terlalu mahal dan tidak dijamin keberhasilannya. keberhasilannya.
Tergantung kondisi lapangan. B
jalan yang ada Longsor Alternatif A
Alternatif B
a. Relokasi arah mendatar
A
r s a d a n u a t B a
b. Relokasi arah tegak
Gambar E.25 Contoh Relokasi Jalan E.2
JENIS KELUARAN
Jenis Keluaran yang dihasilkan dari pelaksanaan pekerjaan ini, adalah : a. Dokumen lelang berdasarkan pada Peraturan Menteri Pekerjaan Umum No. 43/PRT/M/2007 tanggal 27 Desember 2007, Buku 1 tentang : Standar Dokumen Pelelangan Nasional Pekerjaan Jasa Pelaksanaan Konstruksi (Pemborongan) untuk Kontrak Harga Satuan. Susunan dan isi dokumen tersebut diatur sebagai berikut : BAB I
Instruksi Kepada Peserta Lelang
BAB II
Data Lelang
BAB III Bentuk Surat Penawaran, Lampiran, Surat Penunjukan, Surat
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Kecuali BAB VII (Gambar-Gambar), dokumen lelang tersebut dibuat 5(lima) set yang terdiri dari 1 (satu) set Asli, dan 4 (empat) setcopy/salinan. Ukuran kertas A4. b. Gambar rencana atau gambar-gambar (BAB VII) yang merupakan bagiandari dokumen lelang tersebut di atas, berisi antara lain : -
Sampul Luar dan Sampul Dalam
-
Daftar Isi
-
Peta Lokasi Longsoran
-
Peta Lokasi Sumber Bahan/Material (Quarry)
-
Daftar Simbol dan Singkatan
-
Daftar Bangunan Pelengkap (bila ada)
-
Daftar Kuantitas Item Pekerjaan
-
Lembar Peta Topografi detail disekitar daerah
longsoran,
skalayang
mencakup
bentuk
memadai -
Gambar
Rencana
Penanggulangan
Longsoran,
struktur, dimensi struktur, detail struktur yang dilengkapi dengan bor log/grafik hasil bor mesin dan geolistrik (data stratigrafi, bidang gelincir dll yang dianggap penting) -
Gambar penampang melintang jalan setiap 20 meter & memanjangjalan didaerah longsoran dan sekitarnya yang dianggap penting.
Gambar rencana tersebut dibuat 5(lima) set yang terdiri dari 1(satu) set Asli, dan 4 (empat) (empat) setcopy/salinan. Ukuran kertas A3. Foto-foto dokumentasi
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-
Data-data hasil investigasi secara visual dari kegiatan survai pendahuluan, antara lain berupa :
Sketsa dan detail lokasi
Karakteristik umum geologi teknik
Karakteristik umum tanah
Rencana
penyelidikan
terinci
(jenis,
lokasi,
jumlah
sample
daninstrumentasi)
Informasi badan jalan yang berpotensi longsor (penyebab, arah,kedalaman, intensitas keaktifan)
Prakiraan penanganan badan jalan/lereng disekitarnya, dan lain-lain yang dianggap perlu.
-
Foto dokumentasi
Laporan harus diserahkan selambat-lambatnya 1 (satu) bulan sejak SPMK diterbitkan, sebanyak 5 (lima) buku laporan. b. Laporan Bulanan, berisi : -
Semua kegiatan yang telah dilaksanakan oleh penyedia jasa sesuaikontrak pada/selama periode bulan yang bersangkutan;
-
Ringkasan kemajuan (progress) pekerjaan yang dilaksanakan setiap bulan, dan total kumulatif kemajuannya dibandingkan denganrencana;
-
Bila
terjadi
keterlambatan
harus
dikemukakan
kendala
ataupenyebabnya dilengkapi dengan tindakan yang telah/akan dilakukan untuk mengatasi keadaan/kendala tersebut; dan Rencana kerja bulan berikutnya.
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dilaporkan sebelumnya/belum dipresentasikan, dibuat sebanyak 5 (lima) set laporan Laporan-laporan dimaksud, antara lain berisi: -
Laporan Hasil Perencanaan Teknis
-
Laporan Survai Topografi
-
Laporan Penyelidikan Tanah dan Hasil Pengujian Laboratoriumnya
-
Laporan Survai Hidrologi, Hidrogeologi dan Hasil Analisanya
-
Laporan Hasil Penyaringan Lingkungan
-
Laporan Perhitungan Kuantitas dan Perkiraan Biaya ( Engineer’s Estimated )
-
Gambar-Gambar Rencana
d. Laporan Akhir, berisi : -
Ringkasan laporan (Summary kegiatan,
mulai
dari
report )
survai
yang
pendahuluan
merangkum sampai
semua
selesainya
pekerjaan dilaksanakan. -
Laporan-laporan hasil koreksi/penyempurnaan dari konsep Laporan Akhir tersebut di atas.
Laporan harus diserahkan selambat-lambatnya 4 (empat) bulan sejak SPMK diterbitkan sebanyak 5 (lima) buku laporan, dan soft copy kedalam Compact Disk (CD) yang berisi seluruh laporan termasuk gambar-gambar rencana, summary report dan foto-foto dokumentasi sebanyak 5 (lima) buah. E.4
ORGANISASI PELAKSANAAN PEKERJAAN
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Konsultan akan menyiapkan suatu tim yang terpadu yang terdiri dari para ahli profesional dalam bidangnya. Susunan organisasi proyek yang secara lengkap dapat dilihat pada Struktur Organisasi Personil Konsultan.
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U s u la n T e k ni s PT BERMUDA KONSULTAN
Gambar E.26 Struktur Organisasi Pelaksanaan Pekerjaan Pekerjaan PT. Bermuda Konsultan
PERENCANAAN TEKNIK/DED LONGSORAN TERSEBAR PROVINSI GORONTALO TAHUN ANGGARAN 2014
E-72
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U s ul a n T e kn i s PT BERMUDA KONSULTA KONSULTAN N
Konsultan akan membuat uraian mengenai tugas dan tanggung jawab dari masingmasing tenaga ahli, serta menyiapkan jadwal penugasan tim Konsultan. Hal ini dimaksudkan agar tenaga ahli yang terlibat dapat memahami tugas dan tanggung jawabnya, serta tidak terjadi tumpang tindih penugasan. Uraian tugas dan lingkup dari masing-masing tenaga ahli yang akan dilibatkan pada pekerjaan akan diuraikan pada bagian berikut. a. Ketua Tim Mempunyai Sertifikat Keahlian
(SKA)
dibidang
PerencanaanJalan/Jembatan/Transportasi yang dikeluarkan oleh Asosiasi Profesi dan telah diregistrasi oleh LPJK. Ketua Tim disyaratkan minimal seorang Sarjana Teknik Strata satu (S1) Jurusan Sipil lulusan universitas/perguruan tinggi negeri atau perguruan tinggi swasta yang telah diakreditasi atau yang telah lulus ujian Negara atau perguruan tinggi luar negeri yang telahdiakreditasi, dan berpengalaman dalam melaksanakan pekerjaanperencanaan teknis jalan/jembatan/ jalan/jembatan/ penanganan longsoran lebih diutamakan/disukaiselama8(delapan) tahun setelah lulus. Diutamakanyang telahmempunyai pengalaman sebagai ketua tim 2 (dua) paket pekerjaan,
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lebih diutamakan/disukai selama 6 (enam) tahun setelah lulus, diutamakan yang telah mengikuti pelatihan tenaga ahli konsultansi bidang ke-PU-an dari LPJK. Tenaga ahli tersebut tugas utamanya meliputi: -
Mengkoordinir dan mengendalikan semua personil yang terlibat dalam pengumpulan data dari jenis pekerjaan yang ditanganinya, antara lain survei penentuan lokasi penyelidikan geoteknik yang paling tepat,bangunan pelengkap yang diperlukan; dan lain-lainyang berhubungan dengan pekerjaan ini sesuai KAK.
-
Memeriksa
dan
menganalisa
data lapangan
serta
membuat
perhitungan perencanaan geometrik jalan, perencanaan perkerasan dan gambar-gambar yang diperlukan sesuai ketentuan; -
Menjamin bahwa perencanaan jalan untuk penanggulangan longsoran yang dihasilkan adalah pilihan yang terbaik, ekonomis dan sesuai dengan standar yang ditetapkan oleh Direktorat Jenderal Bina Marga.
-
Membuat laporan hasil pekerjaannya secara detail dan lengkap.
c. Ahli Teknik Pengukuran (Geodesi) Mempunyai Sertifikat Keahlian (SKA) dibidang Survei Topografi yang
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U s ul a n T e kn i s PT BERMUDA KONSULTA KONSULTAN N
-
Membuat
perhitungan
dan
gambar-gambar
hasil
pengukurantopografi, dan menjamin bahwa gambar topografi yang dihasilkan benar-benar akurat dan siap digunakan untuk tahap perencanaanteknis secara tepat waktu. -
Membuat laporan hasil pekerjaannya secara detail dan lengkap.
d. Ahli Geoteknik Mempunyai
Sertifikat
Keahlian(SKA)
dibidang
Geoteknik
yang
dikeluarkan oleh Asosiasi Profesi dan telah diregistrasi oleh LPJK.Tenaga ahli yang disyaratkan minimal adalah Sarjana Teknik Strata satu (S1) Jurusan Sipil/Geologi lulusan niversitas/perguruan tinggi negeri atau perguruan tinggi swasta yang telah diakreditasi atau yang telah lulus ujian negara atau perguruan tinggi luar negeri yang telah diakreditasi yang berpengalaman melaksanakan pekerjaan dibidangnya lebih
diutamakan/disukai
selama 6
(enam) tahun setelah lulus, diutamakan yang telah mengikuti pelatihan tenaga ahli konsultansi bidang ke-PU-an dari LPJK. Tenaga ahli tersebut tugas utamanya meliputi: -
Merencanakan dan melaksanakan semua kegiatan yang mencakup
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U s ul a n T e kn i s PT BERMUDA KONSULTA KONSULTAN N
diakreditasi atau yang telah lulus ujian negara atau perguruan tinggi luar negeri yang telah
diakreditasi
yang
berpengalaman
melaksanakan
pekerjaan dibidangnya lebih diutamakan/disukai selama 6 (enam) tahun setelah lulus, diutamakan yang telah mengikuti pelatihan tenaga ahli konsultansi bidang ke-PU-an dari LPJK. Tenaga ahli tersebut tugas utamanya meliputi: -
Mengkoordinir dan mengendalikan semua personil yang terlibat dalam pelaksanaan jenis pekerjaan yang ditanganinya.
-
Mengadakan
penelitian
di
lapangan
permukaan tanah (hidrogeologi)
dan
mengenai data
aliran
curah
diperlukan sehingga menghasilkan data yang
dibawah
hujan
yang
diperlukan untuk
merencanakan dimensi-dimensi drainase dan bangunan pelengkap jalan lainnya. -
Menjamin bahwa data, analisis dan perhitungan hidrologi dan hidrogeologi yang dihasilkan adalah benar, akurat, siap digunakan, dan dapat memberikan memberikan masukan masukan yang rinci mengenai curah hujan hujan dan pola aliran air permukaan serta di bawah permukaan tanah untuk keperluan
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U s ul a n T e kn i s PT BERMUDA KONSULTA KONSULTAN N
-
Mengadakan pengumpulan informasi harga dasar upah, bahan, dan peralatan serta data kontrak sejenis dari instansi-instansi yang terkait dengan pekerjaan konstruksinya.
-
Membuat perhitungan kuantitas semua pekerjaan yang diperlukan untuk melaksanakan pekerjaan konstruksinya berdasarkan hasil perencanaan ini, dan dikelompokan sesuai mata pembayaran yang tercantum pada buku Spesifikasi yang berlaku.
-
Membuat analisa harga satuan untuk setiap pekerjaan yang ada,sesuai dengan
datayangdiperolehdenganmenggunakan
perangkat/pedoman
sebagaimana tercantum pada KAK ini. -
Menjamin bahwa data, hasil perhitungan kuantitas, analisa harga satuan yang dihasilkan/dibuat, adalah benar benar dan akurat.
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U s ul a n T e kn i s PT BERMUDA KONSULTA KONSULTAN N
E.5.2 Perencanaan K3
a. Identifikasi Bahaya dan Pengendalian Resiko Bahaya No.
JENIS/TIPE PEKERJAAN
IDENTIFIKASI JENIS BAHAYA DAN RESIKO K3
a
b
c
1.
3.
Survei Pengukuran Topografi
Survei Geologi dan Geoteknik
JenisBahaya : - Tertabrak Kendaraan - Jatuh - Digigit Ular Resiko : - Luka Berat - Meninggal Jenis Bahaya : - Tertimbun Tanah - DigigitUlar Resiko : - Luka Berat
PENGENDALIAN RESIKO K3 -
-
d Memasang Rambu Secukupnya Memakai Sepatu Boot Memakai APD
Memasang Sheet pile Memasang Rambu Secukupnya Memakai APD
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U s ul a n T e kn i s PT BERMUDA KONSULTA KONSULTAN N
E.5.3 Sasaran dan Program K3
a. Sasaran K3.
1. Tidak ada kecelakaan kerja yang berdampak korban jiwa ( Zero Fatal Accident) 2. Tingkat penerapan elemen SMK3 minimal 80 % 3. Semua pekerja wajib memakai APD yang sesuai bahaya dan resiko pekerjaannya masing-masing. b. Program K3
1. Melaksanakan Rencana K3 dengan menyediakan sumber daya K3 (APD, Rambu-rambu, Spanduk, Poster, pagar pengaman, dsb) secara konsisten 2. Melakukan inspeksi secara rutin terhadap kondisi dan cara kerja berbahaya