Revision No: First Issue Date of Issue: DOCUMENT RELEASE AUTHORIZATION Prepared by
: ____________________________
Reviewed & Approved By : ____________________________
“This document is a property of GPT Infraprojects Limited and is not to be reproduced reproduced copied handed over to a third party or used for any purpose other than that for which it has been !oaned"#
I"
$istory of Revisions Revisio n %o" R+
II"
Revision ate
'hapter ( '!ause %o" & Te)t Te)t a*ected
Reason for Revision ,irst Issue
ocument istribution -r"% o" . / 0 1 2 3
Issued to
%o" of -eats
-ubmitt ed
INDEX CHATER #" UROSE %" SCOE &" DEFINITIONS '" CROSS REFERENCES $" CONSTRUCTION ROCEDURE 2". 2". 2"/ 2"/ 2"0
A!E NO" $ $ $ $ (
4ate 4ateri ria! a!s s for for ,ou ,ound ndat atio ion n 5or 5or6s 6s 'on 'oncret crete e 4i) 4i) for for ,ounda undati tion on P!ants P!ants and 78uipm 78uipment ent9s 9s for 5e!! ,oundat oundation ion 5or6
(" CONSTRUCTION METHODOLO!) METHODOLO!) FOR *ELL FOUNDATION FOUNDATION + 3". 3"/ 3"/ 3"0 3"1 3"2 3"2 3"3 3"3 3"<
-ettin: out Is!a Is!and nd 'o*e 'o*errdam dam & Bar Bar:e :e ;pe ;pera rati tion on 'uttin: 7d 7d:e 5e!! 'urb 5e!! e!! -te -tein inin in: : and and -in -in6in: 6in: P!u: P!u::i :in: n: of 5e!! e!! and and 5e!! e!! 'ap 'ap Time 'yc!e
," INSECTION - TESTIN! +" OH OHS - EN/IRONMENT MANA!EMENT LAN ." ATTACHMENTS #0" DISTRI1UTION
#. #. %# %#
##"
RECORDS
%#
#" UROSE: The purpose of this document is to provide detai! construction methodo!o:y resources dep!oyment and safety & environment system(procedures to be adopted by GPT and its sub=contractors durin: e)ecution of we!! foundation in connection with construction of 4ajor Brid:e over >amuna River at ?a!pi @./<2(/
%"SCOE: The scope of this methodo!o:y covers the fo!!owin: activities • •
• • •
•
Pre!iminary wor6s -e!ection testin: and acceptance of materia!s and mi)es for permanent wor6s ep!oyment of p!ants e8uipment9s and machinery etc" 'onstruction methodo!o:y for we!! foundation" Cua!ity Assurance and Cua!ity 'ontro! durin: construction wor6 and post insta!!ation chec6s tests etc" 'onstruction 4ethodo!o:y for 5e!! ,oundation in water @ 'aissons detai!s wi!! be submitted separate!y
Physica! -cope of wor6 is as fo!!ows ,or dimension detai!s of we!! p!ease ref dr: no AA(.3/3(?ALPI=-DB(5' & '7(+/(R/"
&"DEFINITIONS: The words !i6e 'ontract 'ontractor 7n:ineer @-ynonymous to 7n:ineers Representative rawin: 7mp!oyer Government 5or6s 5or6site used in this methodo!o:y considered sha!! be considered to have the meanin: as understood from the deEnitions of these terms :iven in the Genera! conditions of the contract"
'"CROSS REFERENCE:
The methodo!o:y sha!! be read in conjunction with the fo!!owin: documents • • • •
•
RF%L Technica! -peciEcation" IR- codes @'oncrete Brid:e 'ode etc" 4;RT$ = -peciEcation for 5e!! ,oundation" BI-(A-T4(B- standards( codes referred e!sewhere in this methodo!o:y" Good for 'onstruction rawin: for ?a!pi >amuna Rai! Brid:e"
$"CONSTRUCTION ROCEDURE: $"#
Materia2s for Foun3ation *or4s: The fo!!owin: materia!s sha!! be used for the activity
$"#"# Ce5ent: The cement is ;rdinary Port!and 'ement of 10 :rade & Port!and PoHHo!ona 'ement conformin: to I- ../ & I- .1J codes respective!y and sha!! meet a!! physica! and chemica! re8uirements as speciEed in RF%L spec 4;RT$ spec & 'ontract -pec"
$"#"% Coarse - Fine A66re6ate: 'oarse & ,ine a::re:ate conformin: to I- 00 sha!! be used" Gradation of combined a::re:ates of di*erent siHes @'oarse A::re:ate on!y sha!! be in accordance with I- 00" Farious mechanica! properties of coarse a::re:ates and properties of Ene a::re:ate are to be conformed to I- /03 -eries and the tests sha!! be conducted as per re!evant test codes as described in RF%L spec 'ontract -pec"
$"#"& *ater: Portab!e water sha!! be used for concretin: conformin: to RF%L -pec"
and sha!!
be
$"#"' Reinfor7e5ent Stee2: Reinforcement stee! for wor6s sha!! be ,e 2++ :rade and conformin: to I- .<3 on!y T4T bars to be used"
$"#"$ Con7rete A35i8ture: Admi)ture to be used sha!! be conformin: to I- J.+0 and prior approva! from 7n:ineer sha!! be obtained for the use of Admi)ture"
osa:e of admi)ture sha!! be as per manufacturer9s instructions and as per wor6abi!ity re8uirements which sha!! be Ena!iHed durin: desi:n mi) and tria!s"
$"%
Con7rete Mi8 for Foun3ation
'oncrete mi) desi:n sha!! be carried out as per RF%L -peciEcation and I- .+/3/ or any other standard accepted mi) desi:n :uide!ines and :rade of concrete to be used sha!! be as per drawin: ( speciEcation" The concrete sha!! be desi:ned to achieve desired de:ree of wor6abi!ity for speciEc :rade of concrete to faci!itate concretin: operation" Tria!s sha!! be conducted and cubes sha!! be cast tested before acceptance of esi:n mi)" • • • • •
$"&
Grade Grade Grade Grade Grade
of of of of of
'oncrete 'oncrete 'oncrete 'oncrete 'oncrete
for for for for for
5e!! 'urb 5e!! -teinin: Bottom P!u::in: Top P!u: 5e!! 'ap
4 02 4 /2 4 /2 4 /2 4 02
2ants - E9ui5ent;s for *e22 Foun3ation
The fo!!owin: P!ant(78uipment sha!! be used for e)ecution of 5e!! ,oundation -r" %o"
P!ant escription
4a6e ( 'apacity
%o Re8uire d +/
.
'raw!er 'rane
/+ T TATA
/ 0 1
-he!! Grab iese! :enerator 5e!din: 4('
+"2 = +"J /"2 ?FA
+/ +. +1
2
Batchin: P!ant
+/
3 <
Transit mi)er 'oncrete pump
J .+
Tota! station Auto !eve! 4(' K'B
-chwin: -tetter TATA -chwin: -tetter Leica -o6ia 0
Remar6s
,or we!! sin6in: & shiftin: purpose" ,or we!! e)cavation ,or power supp!y" ,or cuttin: ed:e fab shutterin:(sta:in: etc" . cum(hr
+1 +/
+3 cum capacity
+. +. +/
,or survey ,or !eve! wor6 ,or hand!in: we!!
..
Fibrators
7!ectric
+2
e)cavated soi!" ,or concretin:"
3" CONSTRUCTION METHODOLO!) FOR *ELL FOUNDATION
("#
Settin6 Out
%ecessary reference points sha!! be E)ed away from the Hone of b!ow= ups or possib!e sett!ements resu!tin: from we!! sin6in: operations" -uch reference points sha!! be connected to the permanent tota! stations with the base !ines on the ban6s" Reference points sha!! be a!so be E)ed to mar6 = a)is @Dsua!!y a!on: the traMc direction and >=> a)is @%orma! to = a)is accurate!y" A temporary bench mar6 sha!! a!so be estab!ished near to the we!! away from the Hones of b!ow=ups and or possib!e sett!ement"
("%
Is2an3= Co>er3a5 - 1ar6e Oeration
5e!!s in water @Above 1"+m depth= The area is more than 1"2m deep water formation of protected is!and by constructin: co*erdam a!ternative methods sha!! be adopted" The materia! to be used for construction of co*erdam sha!! be as per desi:n and drawin: dependin: on the operatin: water !eve! with tida! e*ect" The materia! sha!! be either 4- stee! she!! or -tee! -heet pi!e of re8uired siHe fabricated at centra!iHed yard and sha!! be transported to site by trai!er or truc6" -and sha!! be E!!ed into the co*erdam by :rab or manua!!y" In p!an dimension there sha!! be minimum /m wor6in: p!ace in protected is!and formation" @,or reference p!ease refer anne)ure drawin: for co*erdam with sheet pi!e and sheet she!!
1ar6e Oeration To tac6!e the we!! foundation wor6s in water spans dep!oyment of Natbed Noatin: bar:e sha!! be re8uired to approach for transportation of materia!s and machineries to we!! foundation and as we!! as to e)ecute the we!! sin6in: wor6s" The bar:e sha!! be desi:ned for operatin: water !eve! ta6in: into account for draft re8uirement and freeboard with anticipated operatin:
dead !oad consists of we!! sin6in: crane crew and dred:ed muc6 and se!f=!oad" 5e!! sin6in: bar:e sha!! be feed up with materia!s and services to be provided by another bar:e" Tu: boats sha!! be for movement and anchorin:(moorin: of bar:es" Tota! / sets of we!! sin6in: bar:e with re8uired number of Tu:boats to comp!ete the we!! sin6in: wor6s in time" P!ease refer schematic drawin: of we!! sin6in: by Bar:e"
("&
Cuttin6 E36e Sr"N o" . / 0 1 2
Des7rition
Lo7ation Use3
An:!es .2+ .2+ .3 An:!es <2 <2 4- P!ate /+ mm 4- P!ate ./ mm 4- P!ate .+ mm
;uter Tee Brac6ets 'uttin: 7d:e P!ate Bent P!ate & -ti*eners -6in P!ate
The cuttin: ed:e sha!! be fabricated with mi!d stee! structura! sections and p!ated of speciEed :rade as per approved drawin:s" ,abrication of cuttin: ed:e may be carried out at site or at a shop" The cuttin: ed:es sha!! be fabricated in pieces ( se:ments" urin: the process of fabrication and hand!in: ( erection suitab!e temporary supports are to provided ( maintained to render ri:idity and to 6eep shape of the se:ments and ( or parts thereof" %umber of se:ments sha!! be decided prior to start of fabrication dependin: on easement of hand!in: and transport" 'hec6s are to be made on dimension and shape of the se:ments" ,or bendin: the structura! members F cuts may be made and after bendin: such F cuts are to be c!osed by we!din:" Koints in the !en:th of structura! sections sha!! be made with E!!et we!ds with a sin:!e cover p!ate or as shown in the drawin:s"
Too2s an3 2ants for Cuttin6 E36e Fa?ri7ation: • • • • •
Ro!!in: machine ( $ydrau!ic Kac6s for bendin:" ri!!in: machine" 7!ectrica! we!din: machine" Pu: cuttin: machine" $and :rindin: machine ( Tab!e mounted whee! :rinder"
Fa?ri7ation: *or4in6 2atfor5 The wor6in: p!atform is made up of used p!ain stee! p!ates we!ded to each other9s over !eve!!ed concrete surface at the centra! fabrication yard" The fabrication of the cuttin: ed:e invo!ved the fo!!owin: steps"
rearation of ?a74 an62es:@ • • •
Layout of cuttin: ed:e is mar6ed on wor6in: p!atform" An:!e sections are cut of re8uired !en:th" A pair of an:!es sha!! be p!aced to:ether bac6 to bac6 and sha!! be bent to the re8uired radius by hydrau!ic press on bendin: p!atform and same sha!! be chec6ed with curvature temp!ate and corrected if re8uired"
rearation of MS 2ates:@ •
• •
The re8uired width and !en:th of the p!ate as per drawin: sha!! be mar6ed and cut usin: pu: cuttin: machine" P!ate sha!! be bent to the re8uired radius" The same sha!! be chec6ed with curvature temp!ate and corrected if re8uired"
rearation of 1ra74ets:@ • • •
Layout of Brac6ets is mar6ed on wor6in: p!atform" An:!e sections are cut of re8uired !en:th" The an:!es are we!ded as per the drawin: the same is to chec6ed on the !ayout p!atform and corrected if re8uired"
Asse5?2:@ •
The 4- p!ate sha!! be connected with an:!e by tac6 we!d and chec6ed for the re8uired radius" After Ena! chec6in: we!din: sha!! be done as mentioned"
• • •
-ti*eners sha!! be we!ded in re8uired spacin:" Bent p!ates sha!! be we!ded as per the drawin:" ,abricated pieces of cuttin: ed:e se:ments are to be shifted to site by truc6 of trai!er"
Prefabricated se:ments of the cuttin: ed:es sha!! be brou:ht to site of wor6 and assemb!ed at the we!! !ocation" -e:ments of cuttin: ed:e sha!! be erected on Erm & !eve!!ed :round or prepared is!and base at the predetermined position" Temporary support as re8uired to faci!itate assemb!y and 6eepin: the entire assemb!y in true shape sha!! be provided" P!acement of the se:ments sha!! be made with the he!p of a crane on wooden s!eepers p!aced a!on: the periphery of the cuttin: ed:e" imensions shape & siHe a!i:nment and !eve! sha!! be chec6ed by the 7n:ineer and sp!ice p!ate sha!! be we!ded at every joints and Ena! we!din: sha!! be comp!eted"
("'
*e22 Cur?
The fo!!owin: steps are invo!ved in construction of we!! curb"
#" %" &" '" $" ("
2a7e5ent of Cuttin6 E36e" Fi8in6 of for5
2a7e5ent of Cuttin6 E36e: •
•
•
• •
•
•
Accurate survey sha!! be carried out by Tota! -tation for E)in: the we!! !ocations" Permanent reference pi!!ars are to be provided at the four sides i"e" a!on: and across centre !ine of brid:e" The :round is !eve!!ed by removin: the top !oose soi! and compacted and rescued !eve!s are recorded joint!y with the 7n:ineer9s representative" 'entre point of we!! is mar6ed" The fabricated cuttin: ed:e se:ments sha!! be shifted to site by truc6 ( trai!er up to the jetty !ocation the same sha!! be shifted to we!! !ocation by bar:e" 5ooden s!eepers are p!aced at a interva! of ."2+m a!on: the circumference of the cuttin: ed:e" 'uttin: 7d:e is p!aced over wooden s!eepers usin: crane a!i:ned and joined with respect to centre !ines" After a!i:nment joints are to be we!ded"
•
•
Leve! and a!i:nment of cuttin: ed:e sha!! be chec6ed Ena!!y usin: the estab!ished horiHonta! contro!s" If re8uired minor ri:id bracin: are provided for maintainin: proper !eve!" owe! bars are we!ded to 'uttin: 7d:e as shown in the drawin:"
For5
•
•
Inner form pane!s are Erst c!eaned and standard form re!easin: a:ent is app!ied on the surface" To ma6e the shutter joints !ea6 proof suitab!e foam sheets between shutterin: joints and(or mas6in: tape at joints are used to sea! the joints" Inner formwor6 sha!! be erected and a!! the form pane!s sha!! be joined to form the true shape as per the concrete proE!e horiHonta! and dia:ona! supports erected" The erection of inner formwor6 sha!! be as per enab!in: drawin: issued by enab!in: dept" The formwor6 sha!! be hand!ed by crane"
Fi8in6 of Re?ar: •
•
•
•
Rebar9s are cut and shaped at the centra! rebar yard as per the approved bar bendin: schedu!e and transported to site usin: truc6(trai!er up to the jetty !ocation" The bars sha!! be transported to we!! !ocation by bar:e" Ade8uate number of <2 mm cement concrete cover b!oc6s sha!! be p!aced to maintain cover a!on: the periphery of formwor6 and a!so at the bottom to maintain speciEed cover" ;uter vertica! bond bars sha!! be we!ded with an:!e" A!! other reinforcement bars a!on: with any sti*eners ( spacers are E)ed in position as per drawin: and approved bar bendin: schedu!e" The rebar are chec6ed joint!y with 7n:ineer9s representative"
Fi8in6 of Outer For5
•
•
Before E)in: of outer formwor6 entire Noor area sha!! be c!eaned" ,orm pane!s sha!! be E)ed as per drawin:" To ensure the !ea6 proof joints thin foam pac6in: sha!! be provided between adjacent shutterin: pane!s" A!ternative!y mas6in: adhesive tape sha!! be app!ied over the shutterin: joints" Access p!atform usin: !andin: mats are provided for inspection and concrete purpose" 'oi! anchors sha!! be embedded in concrete at appropriate !ocations for erection of shutterin: for the ne)t !ift"
•
,ina! chec6in: sha!! be done joint!y with 7n:ineers representative"
Con7retin6: • •
•
•
•
'oncrete sha!! be done by static concrete pump !ocated on bar:e" 'oncrete sha!! be transported from the nearest batchin: p!ant throu:h transit mi)ers and ferried to we!! !ocation by the bar:e" 'oncrete sha!! be p!aced in a continuous pour" -hear 6ey sha!! be provided at each !ift construction joint" Ade8uate i!!umination arran:ement sha!! be ensured to provide safe wor6in: durin: ni:ht hours to satisfy supervision and safety re8uirements" Preparation of construction joint sha!! be done by :reen cuttin: @removin: the !aitance usin: hard stee!(ny!on brushes before the Ena! settin: is over at each joint to receive the succeedin: !ift of concrete"
Curin6: •
•
'urin: sha!! be done by sprayin: water on surface covered with hessian c!oth" 'urin: can a!so be done by usin: approved curin: compound"
De@sButterin6 an3 !au6e 5ar4in6: • • •
;uter formwor6 sha!! be removed within /1 hours" Inner formwor6 sha!! be removed after
Sin4in6 of *e22 Cur?: •
•
•
After remova! of inner form pane! :unny ba:s E!!ed with sand sha!! be p!aced in between wooden s!eepers a!on: the periphery at the bottom of cuttin: ed:e" Groundin: of the curb sha!! be done after removin: the inner forms" The curb is sun6 to the :round !eve! by manua! dred:in: in the dred:e ho!e" 5hen the dred:in: is partia!!y comp!ete the !oose
•
•
("$
materia! is removed from the dred:e ho!e usin: the p!ate :ran and is dumped outside the area of we!! !ater this dred:ed materia! sha!! be disposed to nearby area provided by en:ineer" The sin6in: history wou!d be recorded in the format as provided in the technica! speciEcation @Appendi) ./++(I 4oRT&$" The sin6in: !eve! is monitored at re:u!ar interva!s of 2++mm"
*e22 Steinin6 an3 Sin4in6: The steps invo!ved in the -teinin: are= ." /" 0" 1"
Inner and outer formwor6" Rebar E)in:" 'oncretin: and curin:" -in6in:"
Inner an3 outer for5
•
•
•
•
Inner and outer formwor6 is made of 1mm 4- -tee! p!ates and ro!!ed stee! sections fabricated for a !ift of /"2m" 0"+ mm thic6 foam sheet adhesive tape at the !ocation of joints are used to sea! the joints" ,orm re!easin: a:ent sha!! be app!ied on the inner face of the pane!s coi! anchors( nuts which are to be embedded in concrete for erection of !ift are E)ed at appropriate !ocations" The inner form pane!s are erected for the subse8uent !ifts the form wor6 is supported on the coi! nut arran:ement with the bottom !ift concrete" The rebar are E)ed in position fo!!owed by E)in: of outer formwor6" ;ver the inner formwor6 ri:id horiHonta! supports sha!! be provide to 6eep the shutters proE!e and it sha!! be used for p!atform after p!acin: the !andin: mats ,ina! chec6in: of formwor6s sha!! be carried by joint!y with 7n:ineers rep"
Re?ar 8in6: •
• •
Re bar are cut and bent at the centra! rebar yard as per the approved bar bendin: schedu!es and transported from the yard by truc6( trai!er" Re bars are E)ed as per drawin: and schedu!e" Ade8uate cement concrete cover b!oc6s sha!! be provided a!on: the periphery of the formwor6 to maintain the cover of rebar"
Con7retin6 an3 7urin6:
• • •
•
P!acement of concrete sha!! be done as described for the we!! curb" -hear 6ey sha!! be provided at each construction joints" The concrete surface sha!! be c!eaned thorou:h!y and surface preparation is made to receive the succeedin: !ayer of concrete" Before castin: the !ast !ift of steinin: it sha!! be chec6ed and veriEed for appropriate stee! for fa!se steinin: :rooves for precast beams to support fa!se wor6 for we!! cap"
De @ sButterin6: The inner and outer form pane!s are removed after ./ hours of the concrete Enished time"
Steinin6 Sin4in6: ,o!!owin: the de shutterin: of steinin: !ift :au:e mar6in: is carried out at both a)es in !ine with we!! curb mar6in: and reference hei:ht is mar6ed on the wa!! surface" The sin6in: operation wou!d be started after .3 hrs of concretin: for steinin:" -in6in: of we!!s sha!! be carried out by dred:e ho!e method by usin: the fo!!owin: steps
Sin4in6 oeration: •
•
•
•
•
•
•
The sin6in: operation invo!ves !owerin: of the we!! by dred:in: in the dred:e ho!e" P!ate :rab sha!! be used in case of soft strata !i6e sandy si!t soft c!ay dense sand etc" In case of hard c!ay sti* c!ay strata heavy=duty chise! sha!! be used fo!!owed by dred:in: usin: Tyne :rab" Leve!s and a!i:nment of we!! sha!! be chec6ed re:u!ar!y interva! of .hr of sin6in: to observe the ti!t and shift of the we!! at c!oser interva!s if the visua! observation demands" -in6in: operation sha!! be preferab!y carry out round the c!oc6 under s6i!!ed supervision" red:ed materia!s sha!! be disposed o* to !ocations desi:nated by the 7n:ineer" The above cyc!e of we!! steinin: and sin6in: sha!! be repeated up to the !ast !ift of the we!! unti! we!! reaches to the foundin: !eve!"
re7autions 3urin6 sin4in6:
•
•
•
•
5hen the we!!s have sun6 c!ose to each other and c!ear distance between them is not :reater than the diameter of we!!s sin6in: sha!! be ta6en up on a!! we!!s and they sha!! be sun6 a!ternate!y" Before seasona! Noods a!! we!!s on which sin6in: is in pro:ress sha!! be to suMcient depths be!ow the desi:ned scour !eve!" Fery deep sump sha!! not be made be!ow the we!! curb" The depth of sump sha!! not e)ceed 0"+m be!ow the !eve! of cuttin: ed:e un!ess otherwise speciEca!!y permitted by 7n:ineer" ewaterin: is avoided if sand b!ows are e)pected"
Ti2ts an3 SBifts: The we!!s sha!! be sun6 into earth with in permissib!e !imit of ti!t and shift= The dred:in: operation sha!! be carried out uniform!y over the dred:e ho!e area" 5hen the minor ti!t and shift occurs the same sha!! be corrected by contro!!ed :rabbin: or partia! dred:in: in the direction opposite to ti!t" In case of ti!t(shift is e)cessive fo!!owin: method sha!! be adopted for correctin: the same" ." 7ccentric ?ent!ed:e Loadin:" /" Providin: Temporary obstac!es beneath the cuttin: ed:e" 0" Pu!! the we!! by winches"
ro7e3ure for 5onitorin6 Ti2ts an3 sBifts: Ti!ts and shifts is monitored by= •
•
'hec6in: the !eve!s at E)ed :au:e mar6 on both of the opposite faces a!on: a)es of we!!" Leve!s are chec6ed from the reference pi!!ars a!on: the a)es estab!ished in advance for this purpose" The di*erence in !eve! wi!! estab!ish the ti!t a!on: the a)is" It is desi:nated as ratio of di*erence in !eve! to dia of we!!" -uch chec6in: and recordin: of ti!ts and shifts are done at re:u!ar interva!s dependin: upon the rate of sin6in: but at !east once a day provided there has been sin6in: of the we!!" The ti!t of any we!! sha!! not be e)ceed . @horiHonta! in + @vertica! and the shift at the we!! base sha!! not be more than
•
("(
.2+mm in any resu!tant direction" 4easurement for ti!t sha!! be ta6en every day are recorded" -in6in: history of we!! sha!! be maintained in the format :iven in Appendi) ./++(I 4;RT&$
2u66in6 of
,a!se -teinin:" Bottom P!u:" -and ,i!!in:" Intermediate P!u:" Top P!u:" 5ater ,i!!in:" 5e!! 'ap"
Fa2se Steinin6: ,a!se steinin: is cast wherever re8uired and mentioned as per drawin:"
1otto5 2u6: ;nce the cuttin: ed:e has reached the foundin: !eve! as shown in the drawin: or as decided by the en:ineer a sump of re8uired shape and shape as shown in the drawin: or decided by the 7n:ineer sha!! be formed" It is desirab!e to have a :ood idea of the shape of the sump either by probin: or by sendin: divers" After comp!etion soundness test of bottom p!u: E!!in: inside the we!! sha!! commence after a period of 0 days"
San3 22in6: After the bottom p!u: and waitin: period is over sand E!!in: sha!! be started" Good 8ua!ity sand sha!! be E!!ed in dred:e ho!e after 0 days of bottom p!u: concrete up to re8uired !eve!" After sand has been E!!ed in the we!! water remainin: on top of the sand sha!! be bai!ed outers" Top !eve! of sand to be chec6ed and top p!u: ( intermediate p!u: of re8uired :rade of concrete and thic6ness sha!! be !aid as shown in the drawin: and ba!ance wor6 of we!! cap sha!! be ta6en up"
Inter5e3iate To 2u6:@ Intermediate ( Top p!u: wi!! be carried out after sand E!!in: as per drawin:"
*ater 22in6: 5ater E!!in: in the steinin: wherever mentioned in the drawin: sha!! be ta6en into consideration"
*e22 Ca Castin6: *e22 7a reinfor7e5ent Layout for the we!! cap reinforcement sha!! be :iven on top p!u: and we!! steinin: concrete" A!ready cut bent and shifted reinforcement sha!! be tied in position as per approved drawin:s" '!ear cover b!oc6s made from same :rade of concrete as that of we!! cap sha!! be tied to reinforcement"
*e22 7a for5
*e22 7a 7on7rete The concrete mi)ed at centra! batchin: p!ant sha!! be de!ivered throu:h transit mi)ers" 'oncrete sha!! be p!aced throu:h 'oncrete pumps" 'oncrete sha!! be vibrated with hi:h fre8uency need!e vibrators" It sha!! be ensured that concretin: is done continuous!y and comp!eted in a sin:!e pour without any co!d joint"
Ti5e 772e A i ii iii iv v vi vii viii i) 1 C
*e22 7ur? 7astin6: Ground preparation for cuttin: ed:e p!acin: ,abricated cuttin: ed:e p!acin: 'uttin: 7d:e 5e!din: 5e!! curb inside shutterin: ( sta:in: Fertica! bars E)in: we!din: etc" Binders ( !in6s E)in: ;utside shutterin: E)in: 'hec6in: & 'oncretin:
Duration 3as ."+ ."+ 2"+ /"+ /"+ ."+ /"+ /"+
e = shutterin: Tota2 3uration *e22 Sin4in6 #5 3a= so ' 5 2ift *e22 Steinin6 Lift %"$5
."+ #, '
i ii iii iv
D i ii iii iv v vi vii viii
Reinforcement E)in: Inner and outer shutterin: 'hec6in: and concretin: e shutterin: & -in6in: Tota2 3uration 1otto5 2u6= San3 22in6= *e22 7a '!eanin: chec6in: < c!earance for bottom p!u::in:" Bottom p!u::in: -and E!!in: Top p!u::in: Reinforcement for we!! cap ;uter shutterin: for we!! cap 'hec6in: and concretin: e shutterin:
/"+ 0"+ /"+ /"+ ."0
Tota2 3uration
#'"0
."+ ."+ 1"+ ."+ 0"+ /"+ ."+ ."+
+" INSECTION - TESTIN!: A!! the Inspection and Testin: re8uirements to be prepared in the form of inspection and test p!ans for various activities described under di*erent c!auses of this methodo!o:y as per re!evant 4";"R"T&$ -peciEcations 'ontract Technica! -peciEcation and other 'odes(-tandards as mentioned in Reference 'hapter by the site Cua!ity 'ontro! representative" These inspection and test p!ans sha!! consist of type of inspection and name of the test to be conducted for product rea!iHation fre8uency of testin: acceptance criteria and cate:ory for inspection" Inspection and test p!ans sha!! be revised whenever there is any chan:e in methodo!o:y and speciEcations etc" Farious Ee!d and !aboratory test formats referred in inspection and test p!ans sha!! be mentioned in respective ITP9s for various activities" Any %on=conformity sha!! be observed recorded corrective(preventive actions and c!osin: of %'R9s sha!! be as per the estab!ished document procedure described in Project Cua!ity P!an" Farious ocuments(Records re8uired to be maintained for the present se:menta! methodo!o:y sha!! be !isted by project 8ua!ity p!an"
." OHS - EN/IRONMENT MAN!EMENT LAN: The ;$ & -afety and 7nvironmenta! 4ana:ement P!an for the project sha!! be prepared to meet the various safety and 7nvironmenta!
4ana:ement re8uirements as mentioned in contract documents and a!so as per the estab!ished ;$& -afety and 7nvironmenta! 4ana:ement -ystems and procedures of GPT I%,RA PR;K7'T- LT"
!enera2 Safet Arran6e5ents: •
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•
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A!! emp!oyees wor6men and !abour of GPT I%,RA PR;K7'T- LT" And its subcontractor en:a:ed for brid:e wor6 sha!! be wearin: proper P"P"7 before enterin: the site" Barricadin: sha!! be provided to cover the entire !en:th of wor6in: area" The barricadin: sha!! be provided as per the approved scheme" Paintin: of barricadin: sha!! be done with approved co!our scheme for prominent visibi!ity" A!! the vehic!es en:a:ed for the wor6 sha!! be Etted with proper indicator systems" Reverse !i:ht rear view mirror and reverse horn sha!! be Etted with a!! the vehic!es" Brea6 steerin: condition tire pressure sha!! be chec6ed periodica!!y" Proper speed !imit sha!! be maintained within the project site" river sha!! not drive vehic!e when he is not Et menta!!y and physica!!y" Proper caution boards Na: boys be p!aced to caution the vehic!e movement at un!oadin: points" Trained supervisors sha!! be dep!oyed at wor6in: sites" DnauthoriHed persons and visitors sha!! not be a!!owed within the critica! area(hard hat area" Trained ,!a: Boy and warnin: systems sha!! be provided" Periodic trainin: sha!! be provided to drivers he!pers and ban6 men and Na: boys" Too! bo) ta!6s sha!! be carried at fre8uent interva!s by safety personne!(site in char:e" Proper supervision and proper p!annin: of the activity sha!! be done" Proper i!!umination sha!! be provided durin: ni:ht wor6" Good house6eepin: sha!! a!ways be maintained nearby wor6in: area to prevent any 6ind of haHards" Any !iftin: e8uipment9s sha!! be en:a:ed in wor6 after proper chec6in: and !oad testin: as per re!evant re8uirement" Periodic maintenance sha!! be done for a!! !iftin: e8uipment9s(devices dep!oyed at wor6" Record sha!! be maintained in prescribed format"
A!! necessary and re8uired safety measures(precautions durin: the e)ecution of job sha!! be underta6en" It sha!! be ensured that the construction materia!s e8uipment and faci!ities wi!! not cause dama:e to e)istin: property or interfere with the operation of the project" A!! e8uipment such as !iftin: too!s tac6!es cranes e)cavators dumpers Ro!!er and oHer etc" sha!! be chec6ed periodica!!y to ensure its safe
wor6in:" It sha!! be comp!ied with a!! app!icab!e provision of safety re:u!ationsO c!ean=up pro:ram and other measure that is in force at the site" It sha!! be comp!y with the instruction :iven by the c!ient safety en:ineer or his authoriHed nominee re:ardin: safety precautions" Protective measures c!ean=up re8uirements etc" ,or a!! major activities potentia! ris6s sha!! be identiEed and e!iminated(minimiHed at p!annin: sta:e by the project safety oMcer Project 4ana:er and 5or6s 4ana:er" The ris6 assessment ana!ysis considers the ris6 inde) @ris6 inde) :uide contains Tas6s haHard identiEcation ris6 assessment & ris6 contro! measures" as $=$i:h and 4=medium or moderate and L=!ow @acceptab!e(to!erab!e ris6" The project safety oMcer wi!! refer to ris6 inde) :uide for determinin: ris6 inde)" Activity & associated ris6 when $i:h or medium is recorded and suitab!e measures sha!! be ta6en to contro! the ris6s" The wor6s 4ana:er and Line supervisors a!on: with project safety oMcer sha!! be review hi:h and medium ris6 activities in order to reduce !eve! of the ris6" 'orporate occupationa! hea!th& -afety department sha!! be informed about actions ta6en to contain the ris6s" $=$i:h and 4=medium ris6 sha!! be bou:ht under contro! by ta6in: suitab!e measures" 5here the activity(ris6 is not covered in ris6 inde) :uide it is further eva!uated and inc!uded in ris6 inde) :uide by the corporate occupationa! hea!th & -afety epartment for further references" The ris6 mana:ement at project !eve! sha!! be carried out for every new activity underta6en where the project is on:oin: and the measures identiEed for ris6 contro! sha!! be recorded in ris6 contro! document by the project site" %ew measures may be re8uired in the form of addition of new wor6 method(precaution(improved safety e8uipment ( additiona! occupationa! hea!th & safety trainin: ( safety si:ns ( posters etc"
#0" ATTACHMENTS: Anne8 #: etai!s of 'uttin: 7d:e for .J".2 ) J".2 m dia we!! curb for ?a!pi >amuna Rai! Brid:e Project" Anne8 %: etai!s of 5e!! -teinin: for .J ) J m dia we!! for ?a!pi >amuna Rai! Brid:e Project" Anne8 &: ,abrication detai!s of Inner and ;uter formwor6 for we!! curb for ?a!pi >amuna Rai! Brid:e Project"
Anne8 ': ,abrication detai!s of Inner and ;uter formwor6 for we!! steinin: for ?a!pi >amuna Rai! Brid:e Project" Anne8 $: 4;RT&$ -in6in: etai!s to be used"
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DISTRI1UTION:
The document sha!! be distributed to a!! concerned users"
#%" RECORDS This se:menta! methodo!o:y sha!! be retained ti!! project comp!etion"
