140808 P49 Method Statement for Demolition Rev.1

METHOD STATEMENT FOR

RECOVERY PLAN OF P49

Rev.1 July 24, 2014

Rev. Draft by Submission Date Eng. Approval

0 MiyamotoSuzuki/Hasegawa 28June2014

1 MiyamotoSuzuki/Hasegawa 24July2014

KAJIMA WASKITA

KAWA JOINT OPERATION

Document No. MS_RPP49

Rev 1

KAWA Joint Operation

TABLE OF CONTENTS

A. Method Statement for Recovery Plan

1. Work Location ...................................................................... 1

2. Equipment List ...................................................................... 1

3. Work Schedule ...................................................................... 2

4. Shop Drawing ...................................................................... 2

5. Current Condition ...................................................................... 3

6. Activity Flow ....................................................................... 4

7. Activity Description ..................................................................... 5

8. Organization Chart ...................................................................... 16

9. Safety Plan ...................................................................... 16

10. Traffic Management..................................................................... 16

B. Attachment

1. Approved Shop Drawing

2. Traffic Route and Working Space

3. Working Stage for Pier Head and Column

4. Site Arrangement for 250 ton Crane Activity and Catalogue of 250 ton Crane

5. Position of Coring and Cutting

6. Location of Crush Yard and Transportation Route

7. Risk Assessment

8. Study of Structural Stability during Demolition of Pier Head

9. Detailed Wire Sawing Activity on Pier Head and Column

10. Procedure of Demolition of Column & Footing and Pile Head Treatment


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METHOD STATEMENT FOR RECOVERY PLAN FOR P49

1. WorkLocation

This method statement describes detail explanation of Recovery work for Pier-49.

Figure1. Work Location

2. EquipmentListTable of Equipments Usage

ITEM WORK DESCRIPTION MACHINE NO.OF UNITS

1 Mobilization Crawler Crane 250 Ton 2 nos

2 Working Stage Mobile Crane 50 Ton 1 nos

3 Coring and Cutting

Wire Saw(DSM-101A)

Expected Productivity 6m2/day

(*1)See image of Equipment 2 sets

Generator (100kVA) 1 set

Coring Machine 2 sets

4 Transportation

(to Crush Yard)

Trailer (40ton class)

Carrying Capacity 60ton 2 sets

5 Crushing Work (Site) Excavator (0.8m3 class)

with crusher attachment 2 sets

Giant Breaker 2 sets

Water jet 1 set

Excavator (0.8m3 class) 1 nos

Dump Truck (10 ton) 1 nos

6 Crushing Work (Crush Yard) Crawler Crane 250 Ton 1 nos

Excavator (0.8m3 class)

with crusher attachment 1 set

Water jet 1 set


2

Sprinkler Truck 8kl 1 nos

7 Transportation

(for disposal) Dump Truck (10 ton) 2 nos

Excavator (0.8m3 class) 1 nos

8 Shoring for Earth Work Vibration Hammer 1 set

Note: The number of equipment can be changed following the site condition

(*1)ImageofWireSawEquipment

3. WorkScheduleWorking Schedule for Recovery of P49

Approval of Diversion & Demolition MethodImport of Material & Equipment for Demolition Work

Temporary Backf illing at P50(L) 14Diversion Work 7Installation of Support & Scffolding 10Pier Head Wire Sawing 2 37 332m2Dismantle of Support & Scaffolf ing 10Diversion Work 7Installation of Scaffo lding 2Pier Wire Sawing 2 9 76m2Dismantle of Scaffolf ing 2Pier BH+GB 1 3 27m3SP+Excavation 21Footing BH+GB 2 26 567m3Re-constructionOriginal Schedule :Amendment 2) 165

Sub-Total 313

Jul Aug2015

Ju l Aug Sep Oct Nov Dec Jan Feb MarDiscriptionDemolition

Method Gr.

P49

Apr May JunDuration

(Calender day) Q'ty2014

Normal Working Hour: 8:0017:00

(Overtime work will be considered depend on safety condition & progress)

4. ShopDrawingsApprovedshopdrawingofthestructureisattachedinAttachment1.

Expected Productivity of Wire Sawing

6m2/day/set


3

5. CurrentConditionThecurrentconditionofP49andstressingstatusofthepierheadareshownasbelow;

Photo1.CurrentConditionofP49

Figure2.CurrentConditionofTendonatP49PierHead


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6. ActivityFlowTheactivityflowsisasfollow;

1. TrafficDiversion

6.CuttingPierHeadConcretebyWireSaw

2.PreparationofWorkingYard

3.InstallationofWorkingStageforPierHead

4.Mobilizationof2nosof250tonCranes

5.CoreBoringWorkonPierHead

7.TransportationofPierHeadConcretetoCrushYard

8.DismantlementofWorkingStageforPierHead

9.InstallationofWorkingStageforColumn

11.CuttingColumnConcretebyWireSaw

10.CoreBoringWorkonColumn

12.TransportationofColumnConcretetoCrushYard

13.DismantlementofWorkingStageforPierHead&Demobilizationof2nosof250tonCranes

14.DemolitionofColumnConcretebyGiantBreaker

15.EarthWorkforexposureofFooting

16.DemolitionofFootingConcretebyGiantBreaker

17.BreakingConcreteinCrushYard

17.BreakingConcreteinCrushYard

ReConstruction


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7. ActivityDescription7.1TrafficDiversion

Inordertoconstructthediversionroad,preparationworkshallberequiredasfollows. 1.Backfilling&rigidpavementaroundP50L.2.AdditionalwideningaroundP49.3.Protectionofundergroundutilities.4.Preventionmeasuresagainsttheresidents&shops,ifany.

AnoutlineoftherouteisshowninFigure3.Detailedplansuchashorizontalalignment,typicalcrosssections,protectionofundergroundutilitiesareshowninAttachment2.

Figure3.TrafficDiversionPlan

7.2PreparationofWorkingYard

After the trafficdiversion,workingareawillbepreparedby relocationofmaterialsandcompactionoftheyardforheavyliftingworkandtransportation.Ordinaryfenceswillbeinstalledaroundtheworkingarea.


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7.3InstallationofWorkingStageforPierHead Aworkingstageforthepierheadwillbe installedafterpreparationofworkingyard.Anoutlineoftheworkingstage isshown inFigure.4andshopdrawing isattached inAttachment3.

Figure4.WorkingStageforPierHead

7.4Mobilizationof2numberof250tonCranes

2numbersof250toncranewillbemobilizedduring/afterinstallationoftheworkingstage.AcatalogueincludingworkcapacityofthecraneisattachedinAttachment4.

7.5CoreBoringWorkonPierHeadThereare2typesofcoringdiameterthatwillbeusedfor installingofwiresawandattaching lifting tools.Verticalboredholes,diameter75mm,willbeutilized forwiresawcutting.Ontheotherhand,horizontalboredholes,diameter50mm,willbeusedfor liftingof concreteblocks thatmustbehoistedbefore cuttinguntilunloading onground.AquantitytableoftheworkisshowninFigure6.2groupsofcoringmemberswillworkonthepierhead.Awatertankwillbepreparedbeforecommencementofthecoringforsupplyingwaterduringcoringofconcrete. Detailcoringpositionsareshown inAttachment5andFigure7.PhotoandsketchoftheactivityareshowninFigure8.


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Figure6.QuantityTableforCoringWork

Figure7.PositionsofCuttingandCoring

Figure8.PhotoandSketchforCoringWork


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7.6CuttingPierHeadConcretebyWireSawAftercoringconcrete,liftingtoolsandawiresawwillbeinstalled inhorizontalholesand vertical holes, respectively. Before commencement of cutting, a concrete blockwhichwillberemovedmustbehoistedasmuchasaselfloadoftheconcreteblockby250toncrane.Safetyfacilities,suchasaspecialprotectionboardandsheetforawiresaw mentioned in Figure10 must be installed properly before start of the work. Inaddition,protectionboardsforPCtendon,whichisshownonFigure4andAttachment3,willbeinstalledproperlybehindanchoragesoftendonattheedgeofthepierheadin order to protect a sudden spring out of strands and wedges during cutting ofconcreteofthepierhead.Thesequenceofcutting,thatstructuralstabilityhasbeenconsideredinAttachment8,the site arrangementwith working capacity of 250 ton crane and sketches of wiresawing method are shown in Figure7, 9 and 10, respectively. See more detailedsketchesofwiresawingmethodinAttachment9.

Figure9.Sitearrangementwithworkingcapacityof250toncrane


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Figure10.Sketchesofwiresawingmethod

Section View of Cutting Lifting Gears


10

7.7TransportationofPierHeadConcretetoCrushYard The transportation route and loading shape of a block concrete on a trailer areshown inFigure11andAttachment6.Ablockconcretewillbetransportedbytrailersfromsitetothecrashyard(MarundaPCUStockYard).Itisconfirmedonadrawingthatthereareenoughspacesfortrailerstoturnatallcornersontheroute.Flagmenwouldbeassignedatgatesofyardsandcornersinordertoavoidtrafficcongestionsonpublicroadduetothistransportation.

Figure11.Transportationrouteandloadingshapeofablockconcrete

7.8DismantlementofWorkingStageforPierHead

Theworkingstageforpierheadwillbedismantledwith250toncranes.Materialsoftheworkingstagewillbetransportedtostorageyardimmediatelyafterdismantlementinordertokeepworkspacesfornextstepsofdemolitionwork.


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7.9InstallationofWorkingStageforColumn

Theworking stage for the columnwill be installed just after removal of aworkingstageforpierhead.Thisworkingstagewillbeoccupiedbycoreboringworkandblockconcretecuttingforthecolumn.

Figure12.WorkingStageforColumn

7.10CoreBoringWorkonColumn

A groupof coringmemberswillworkon theColumn.Water tankwillbepreparedbeforecommencementofthecoringforsupplyingwaterduringcoringofconcrete. DetailcoringpositionsareshowninAttachment5andFigure7.


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7.11CuttingColumnConcretebyWireSawSafetyfacilities,suchasaprotectionboardandsheetmentioned inFigure13willbeinstalledproperly.Thesequenceofcutting,thesitearrangementwithworkingcapacityof250toncraneandsketchesofwiresawingmethodareshowninFigure7,9and10,respectively.

Figure13.Safetyfacilitiesonwiresawingatcolumn

7.12TransportationofColumnConcretetoCrushYardThetransportationrouteandloadingshapeofablockconcreteonatrailerareshowninFigure11.Ablockconcretewillbetransportedbytrailersfromsitetothecrashyard.It isconfirmedonadrawingthatthereareenoughspacesfortrailerstoturnatsomecornersontheroute.

7.13DismantlementofWorkingStageforColumn&Demobilizationof2nosof250tonCrane

The working stage for Column will be dismantled by manpower. Materials of theworkingstagewillbetransportedtostorageyard immediatelyafterdismantlement inordertokeepworkspacesfornextstepsofdemolitionwork.Simultaneously,250toncraneswillbedemobilizedorrelocated.

SectionViewofCutting LiftingGears


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7.14DemolitionofColumnConcretebyGiantBreakerThe columnwill be demolished by cutting and liftingmethod until about 2m highfromcurrentgroundelevation.Thecolumnheightlessthan2mwillbedestroyedbyagiantbreaker.Concretedebrisandrebarwillbeseparatedandsentouttofinaldisposalyardandscrapyard,whichwillbedecidedandinformedbeforecommencementofthetransportation, directly using dump trucks. See more detailed sketches of columndemolitioninAttachment10.

Figure14.DemolitionofColumnConcretebyGiantBreaker

7.15EarthWorkforExposureofFooting

Sheet piles and its support members will be installed around a footing. Afterinstallationofearthshoring,excavationforexposureofthefootingwillbecommenced.

Figure15.EarthWorkforExposureofFooting


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7.16DemolitionofFootingwithPileHeadbyGiantBreaker After exposure of the footing, itwill be demolished by a giant breaker. Concretedebrisandrebarwillbeseparatedandsentouttofinaldisposalyardandscrapyard,which will be decided and informed before commencement of the transportation,directlyusingdumptrucks.Pileswillbecutabout100mmbelowtopoftheelevationofleanconcrete.SeemoredetailedsketchesoffootingdemolitioninAttachment10.

Figure16.DemolitionofFootingbyGiantBreaker


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7.17BreakingConcreteinCrushYard Transportedconcreteblockwillbeunloadedby250toncraneinthecrushyard.Theconcreteblockwillbedemolishedbyagiantbreakerwhichcanbe installedaspecialattachment fordemolition.Duringdemolition,waterwillbe sprinkled followingHSEregulation in order to avoid dust from demolishing concrete. Rebar in the concreteblockwillbe separated and scrapped.Concretedebriswillbe sent todisposal area,whichwillbedecidedand informedbeforecommencementofthetransportationbutshouldbeneartothecrushyard.

Braker

Excavator

Dump truck

Rebar

Waterjet

Attachement

Trailer

Figure17.BreakingConcreteinCrushYard

7.18ReConstructionWork

Afterdemolitionoffooting,furtheranalysiswouldbenecessaryforevaluationofthepiles. The detail of treatment of piles and the modification of footing may beconsideredwithresultsoffurthertestsandanalysis.However,thecolumnandthepierheadwill be reconstructed at the same location following original design.Detailedconstruction methods have been approved which will be applied during itsreconstruction.


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8. OrganizationChart(DemolitionWork)

FUJIMORI081398554217 081931072529

CHIEFENGINEERINGANDESITKRISNA M.FAJARDANIEL

QCMANAGER

081281968313

081331523500

HSEMANAGER

GENERALSUPERINTENDENTFUKUDA

BAMBANGBUDIMULYONO MIYAMOTO

DEPUTYGENERALSUPERINTENDENTSUTOPO

CHIEFHSEMANAGER CHIEFCONSTRUCTIONMANAGER ENG./COMMERCIAL/CONTRACTMANAGEROKADA

MANAGERSAITO

081294991440 081282212840 08119447342

CONSTRUCTIONMANAGERSUZUKITobeassigned

ConcreteCutting&Coring

CONSTRUCTIONMANAGER

JOSVDemolitionbyGiantBreaker

HASEGAWA

JOSV(JAPANESE)

082113094761

08111849422

Figure18.OrganizationChart9. SafetyPlan

Safety activities must be conducted in accordance with Risk Assessment. The Risk

Assessments for below mentioned activities are shown in Attachment 7.

a. Common Work b. Wire Sawing Work

10. TrafficManagementBased on proposed traffic management plan, Contractor will keep roads in good condition at

all times, and will carry out repair and reinstatement work. We will co-operate with the

pertinent agencies regarding traffic control and all details will be subject to maintaining

traffic safety and the avoidance of traffic delay.

In order to facilitate traffic through the work area, it will be installed and maintained at

prescribed points on the work area and at the approaches to the work: rubber cone, warning

and guide signs, temporary barriers and fences and other facilities as required. During

construction period, the traffic management will be implemented according to the stages of

work progress following construction stages. If the location is adjacent to existing traffic or

pedestrian path, Safety fence with MCB will be provided. Traffic management will be

discussed with related parties in the timely manner.

Documents

140808 P49 Method Statement for Demolition Rev.1