Tài liệu Presentation girder construction

Chapter 3: GIRDER CONSTRUCTION GIRDER CONSTRUCTION Site Condition P3 Side (Bai Chay Side) GENERAL VIEW OF THE BAI CHAY BRIDGE 903000 902500 129500 435000 129500 5200 11000 47499 47499 41000 Shin - so φ3000 l = 10.0m, n=3 Shin - so φ3000 l = 10.5m, n=3 P5 A2 26000 12000 8500 A1 6700 4000 12000 4000 21000 6000 2500 Shin - so φ2500 l = 9.5m, n=2 l = 9.0m, n=2 DL 0.000 HON GAI 40250 MAIN BRIDGE 6700 Shin - so φ3 000 l = 15.0m, n=4 29500 31Seg. 27X1750=47250 2500 32Seg. 40250 BAI CHAY 99000 40000 250 29500 750 5200 32Seg. 90000 27X1750=47250 2500 31Seg. 86000 2500 86000 2500 3000 35000 90000 250 750 P1 P6A 18000 6000 P3 P2 17000 P4 5 ERECTION OF TRAVELLER 1 2005 JUN 23 3 4 5 24 6 7 8 SHIN-SO AUG 25 9 17 X 9 (10) DAYS 13 OCT 27 WALL 14 SIDE SPAN 1 X 12 DAYS 15 16 17 18 NOV 28 9 1 2 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 DISMANTLE OF J/F 25 JAN 30 FEB 31 MAR 32 27 28 30 31 ◆P6A Connection SEP 38 NOV 40 COMPLETION OF WORK DEC 41 ◆Removal Form Traveler 17 18 11 12 19 12 13 20 13 14 21 14 15 23 16 17 18 22 15 1 X 12 DAYS 1 X 12 DAYS 16 17 18 DISMANTLE OF J/F 24 2 3 4 5 6 7 8 9 17 X 9 (10) DAYS 10 11 12 13 14 15 17 18 19 20 20 21 21 22 23 23 24 24 25 25 12 X 9 (10) DAYS 26 27 27 28 22 23 COLUMN TOP PIER TABLE ROAD WORKS 24 25 26 12 X 9 (10) DAYS 27 28 28 29 12 X 9 (10) DAYS 29 30 30 31 31 TRAVELLER BACK 1 X 12 DAYS 16 19 TRAVELLER BACK 32 30 31 SIDE SPAN 32 DISMANTLE OF TRAVELLER WORKS DEMOBILIZATION OCT 39 ◆Center Closure 17 X 9 (10) DAYS ANCILLARY & ELECTRICAL TARGET COMPLETION OF WORK 16 9 10 11 CLOSURE POUR 36 AUG 37 17 X 9 (10) DAYS 10 CLOSURE POUR JUN 35 JUL 9 29 DISMANTLE OF TRAVELLER 15 8 26 MAY 34 2006 ◆P1 Connection 8 22 12 X 9 (10) DAYS 14 7 29 APR 33 ◆P2,P5 Connection 7 26 ROAD WORKS 13 6 21 COLUMN TOP PIER TABLE 12 5 6 9 11 4 5 1 8 10 3 4 20 20 21 22 23 24 2 3 19 19 DEC 29 20Seg/32Seg 140m Cantilever 6 7 8 0 5 ERECTION OF TRAVELLER TET HOLIDAYS SUPERSTRUCTURE 10 11 12 SEP 26 Nov.2005 1 7 2 1 2 3 4 0 6 MAY 22 JUL TOWER SUPERSTRUCTURE ◆Cycle of Cantilever Work PIER APR 21 2 3 4 1 LIFT~24 LIFT 1 LIFT~24 LIFT 1 TOWER BASE MAR 20 ◆Form Traveler Assembling ERECTION OF J/F ERECTION OF J/F FEB 19 ◆6.5m/Seg. PIER TABLE PIER TABLE JAN 18 SUPERSTRUCTURE 9.9m*2=19.8m ◆Pier Table 9.9m*2=19. 8m DISMANTLE OF TRAVELLER TET HOLIDAYS P1 P2 Pier Table Construction Form Traveler Assembling ◆Limited Area ◆Inside Tower Crane Radius ◆Limited Weight 135 ton Form Traveler Form Traveler Assembling Form Traveler Assembling Form Traveler Assembling Completion Main Girder Section 25.3m 8.00 2.50 .25 2% 2% 3.20 3.65 8.00 .25 .20 .56 2.50 .40 25.30 3.00 3.75m 5.25m 350mm 200mm ◆One-Cell ◆Steel Bracing Pipe ◆ 5m Long Wing (interval 3.25m, Square Type thk=16mm and Round Type thk=9mm) ◆ 45Deg Web .40 PC Bar & Strand Position Longitudinal PC Bar Φ32 (40-30Nos/Seg) from 4Seg.30Nos Transverse PC Strand S21.8 (18-12Nos/Seg from 5Seg 12Nos) Longitudinal PC Strand 12S12.7 (Center span 18Seg 20Nos, Side span 24seg(P3),22Seg(P4) 10Nos ) Detail of Steel Bracing Pipe (Square Type) PC Strand 12S15.2 Stay Cable Formwork Tube PC Bar Φ26 Dead Anchor Square Steel Pipe □250x250, t =16 Steel Bracing Pipes 3.1 Gider Cycle Schedule 1st day ▪ Casting concrete 2nd day ▪ Curing for concrete ▪ Removal stop end form ▪ Roughing of concrete surface 3rd day ▪ Stressing ▪ Launching of traveler ▪ Setting up form (External and Bottom) 4th day ▪ Installation of bottom slab and web rebar 5th day ▪ Installation of bottom slab and web rebar ( Steel brace foundation part) ▪ Installation of steel pipe brace ▪ Inner form and upper slab form Setting 6th day ▪ Installation of form for upper steel brace part ▪ Installation of Form Tube 7th day ▪ Re-Bar for stay cable anchor position ▪ Installation of upper slab rebar 8th day ▪ Installation of upper slab and PC materials. ▪ Final Form and Form Tube adjustment Cantilever Work Concept 1st ( / ) C uring M ain Activity RailB eam Launching Rem ovalEnd Form 2nd ( / ) Tensioning Form Traveler Launching Form C leaning & Form O il 3rd ( / ) Form Setting Low er Re-B ar Installation Form W ork C hecking and Repairing 4th ( / ) Low er Re-B ar C om pletion Inner Form Setting B racing Pipe setting C onstruction Joint chipping Inspecti on Item Transverse Tendon tensioning inspection PC -Strand 15.2m m M aterial inspection LongitudinalPC B ar Φ32 tensioning inspection B racing Pipe Assem bling Inspection B racing Pipe 15.2m m tensioning inspection 5th ( / ) U pper Re-B ar Installation PC -M aterialArrangem ent 6th ( / ) U pper Re-B ar Installation PC -Strand Installation Form Tube setting G rout H ose setting Transportation Jack Pum p PC C oupler connection inspection PC strand position inspection FinalInspection for C asting PC -B ar setting inspection U pper Re-B ar inspection C asting Inspection Low er Re-B ar Inspection B racing Pipe setting inspection Form tube setting inspection Form inspection C om pletion inspection for C ast Segm ent (After 100% cable stressing) PC -Strand m aterial21.8m m inspection (Rust checking) PC -B ar m aterialinspection before inserting.Taping condition Elevation of Form checking Form Traveler Form Setting C hecking list Re-B ar for U pper Slab Form Traveler checking list for launching Re-B ar for B ottom Slab and W eb PC B ar Arrangem ent & PC B ar m arking by tape for proper coupling. Transverse Strand Elevation checking.(1T22) Stressing PC B ar dia 32. Survey M arking C onfirm ation (C enter ,Elevation and Transverse) Stressing PC strand 1T22 C oncrete C hipping C ondition C leaning W aste C oncrete M &H and Vinaconex C uring C ontrolling on site. C leaning w ork after concrete casting. Precam ber value confirm ation for form setting H and railm aterial arrangem ent for Form Traveler launching Inner Form Elevation , C enter line C hecking Inner form cleaning and replacing dam aged form G rout hose checking and num bering,hose band connection taping Form Traveler before casting check list C leaning condition check by Torch Lights corners of bottom form s. Pum p and concrete pipe arrangem ent for M &H . Tow er C rane & Truck arrangem ent B ottom finishing.1tim e w ooden trow eland 1tim e steeltrow el. Location and Angle checking of B racing Pipe PC -B ar length checking W aste concrete basket setting up. C hecking G rout H ose by Air after concrete casting.PC -Strands shallbe m oved to check clogging. C hecking list shallbe prepared. Location and Angle of Form Tube checking Form traveler anchor position check Transverse tendon anchorage treatm ent C uring w ater preparation (m agic w ater) C oncrete B lock rem oval from deck. W aste B asket preparation. H ook re-bar arrangem ent. Form oilfor box. Re-bar m ortar painting for prevention rust. Tow er crane arrangem ent for concrete block rem oval C om pressor arrangem ent for grout hose checking. Transverse Anchor head treatm ent.(C oncrete cap) W eather forecast checking for concrete casting Arrangem ent for rain.Roof sheet B olt setting for elevation m onitoring.(B ench M ark) C hecking W eb portion com paction C oncrete com paction C hecking foot of bracing pipe. Transverse G roup C ontrolling before Form oilapplying launching for cutting strands. Keeping Jack & Pum p B racing Pipe assem bling properly,covering by C hecking and D ead sheets. Anchor Setting Stressing B racing Pipe(After com pletion ,im m ediately inform to Stay C able Team . Stressing PC B ar 26 for B racing Pipe Lighting system for launching.W ork becom e late) C leaning W ork B lock O ut form Setting Stop End Form Reterder Form Traveler C hecking list before launching Electric cable arrangem ent for Jack & Pum p Tensioning Record for stressing bracing pipe C oncrete m aterialstock checking Rem ovalTransverse Anchorage treatm ent form Tensioning Record Stressing PC B ar 26 for B racing Pipe C uring m at and w ater preparation O pening form B lister,inner form and bottom of B racing pipe to check honeycom b. Vinaconex Re-B ar m aterial transportation and arrangem ent PC M aterialArrangem ent Elevation m arking for bench m ark.After Stay cable tensioning 100%) Repairing H oney C om b Survey arrangem ent for after launching(B oth side) Form Tube M aterial Arrangem ent Survey arrangem ent for after concrete casting Stop End form Reterder C hecking G round C onditon to confirm the accessibility of truck m ixers. B racing Pipe C able Previous Segm ent C utting C hecking W ater Tank C apacity and volum e. Separate W ork and D aily Activity G routing W ork C leaning Surface W ork Request for Inspection Arrangem ent 8th ( / ) C oncrete Form Tube C onfirm ation C oncrete B lock rem ovalfrom deck. B racing Pipe PC -B ar Φ26 tensioning inspection Arrange RailB eam Relocation m ent checking list 7th ( / ) U pper Re-B ar Installation Form Tube Adjustm ent D aily Report C hecking C oncrete com paction checking for blister Vibrators controlling, m inim izing hitting D ucts. C oncrete can not be run m ore than 1m basically. Spraying w ater for construction joints. Plastic sheet for shading. Avoiding sunshine for concrete. Lighting system confirm ation for finishing .(N ight tim e activity) 3.2 Cantilever Cycle Schedule Date 1 Description Casting Concrete ( 90m3/block ) 2 Curing 4 5 Rail Beam Relocation Traveler Move and Fix 7 8 Form Down and Launching Removal of Stop end and Internal form Formwork External and Internal Slab Re-Bar Material Arrangement Rebar work Internal Web and Anchorage Web and Bottom Slab Form Adjustment Upper Slab and Anchorage etc. Upper Slab Installation for PC Bracing Pipe & Form Tube Setting Brace Steel Pipe and PC Strand ・ C oncrete ・ Stressing ・ Bracing Pipe Assem bling ・ Rebar and PC of W eb 　and Bottom Slab Inspection Date 1 Description Casting Concrete ( 90m3/block ) 2 Curing 3 4 ・ Stressing 5 ・ Rebar,PC , 　and Form 6 7 Rail Beam Relocation Traveler Move and Fix Removal of Stop end and Internal form Formwork Form Down and Launching External and Internal Slab Re-Bar Material Arrangement Rebar work Internal Web and Anchorage Web and Bottom Slab Form Adjustment Upper Slab and Anchorage etc. Upper Re-Bar Installation for PC Bracing Pipe & Form Tube Setting Brace Steel Pipe and PC Strand ・ C oncrete ・ Stressing ・ Bracing Pipe Assem bling Inspection ・ Rebar and PC of W eb ・ Stressing 　and Bottom Slab Installation Stay Cable Girder Survey ◆Morning Time Survey 8 Removal of Laitance Stressing Pre-Stressing Center Span 6 Stressing Pre-Stressing Side Span 3 Removal of Laitance After casting After Launching Stressing 80% ・ Rebar,PC , 　and Form Stressing 100% After 80% After 100% Form&Form Tube Adjustment 1 1stDay 2 Casting Concrete Bottom Slab 1stDay Casting Concrete Upper Slab 1stDay Casting Concrete 1stDay Curing Concrete 2Days