Replace a Form with Half-Slab Replacement of Slab Thickness 100mm Immediately Concrete Placing after Girder Set Contribute to Girder Stiffness Increasing Improvement of Workability and Safety
Pre-stress Optimization
Straight Tendon Arrangement Minimize of Friction Loss
Intermediate Tendon Arrangement Maximization of PS Efficiency Minimize of Long Term Loss
Simple Continuation For Reduce of Expansion Joint Other Type Continuation Method
BH Girder Continuation Method
Existing Continuation Method
BH Girder’s Continuation Method
Rebar Only or Extra PSC Continuation Method
Choice of a Simple Method
Rebar Only : Crack Occurrence
Need not Considering Girder when Continuation
Extra PSC
Beneficial Way for Designing and Construction
: 3Span Over Continuation Impossible
Finite Element Analysis End-Section Anchorage
RM Space
Intermediate Anchorage
Continuation Part
RBSN (Rigid Body Spring Network)
Launching Girder Uijeongbu Light Railway
Launching Application Analysis for BH Girder
GS E&C and Towoong E&C’s Achievement Site : UiJeoungBu Light Railway Construction Period : 2007.10 ~ 2012.08 Construction Cost : 14,000,000 USD Construct Bridge by Launching Gantry UiJeongBu Light Railway Construction Site
Construction Process
BH Girder and PSC-I Beam(PCI) PSC-I Beam’s Cross Section (PCI)
BH Girder and U-Girder U-Girder’s Cross Section (Indonesia)
BH Girder’s Cross Section
Comparison
U-Girder
BH Girder
Span
31.9
31.9
Height
1.850
1.400
Spacing
2.30
2.50
Upper Flange Width
1.90
2.20
Lower Flange Width
1.30
1.30
BH Girder and Super-T Beam Super-T Beam’s Cross Section
BH Girder’s Cross Section
Comparison
Super-T
BH Girder
Span
40.0
40.0
Height
1.750
1.500
Spacing
2.25
2.50
Upper Flange Width
1.96
2.20
Lower Flange Width
0.70
1.30
Rule Out of Form and Supporting post Conventional Slab Working Method
Safety Working with Half-Slab
Exclude Slab Form Installation Works Exclude Slab Form Disassemble Works Exclude Slab Form Supporting works Prevent Negligent Accidents Improvement of Workability
Decrease Earthworks Amount than Another PSC Beams Possible the Securement Space below Girders
Save the Cost of Construction for Earthwork Keep the Slender Shape Give the Sense of Openness
Contribution for making a fine view
The Longest Length among PSC Beams Other PSC Beams with 40m
BH Girder with 60m
Suppose Constructing 240m Bridges… (in South Korea) Decrease the Cost of Making 2 Piers = about 200,000 USD x 2 span = about 400,000 USD Decrease the Cost of Crane = about 15,000 USD x 2Crane x 2 Span = about 60,000 USD Decrease the Period of Salvage Work = about 5,000 USD x 10 unit = about 50,000 USD
Reduced Percentage of Earthworks = (0.562/2.362)x100
Reduce
Pier Works Reduce (assumption L=240m) PSC Beam’s General Longest Length : 40m x 6unit (5 Piers) BH Girder’s Longest Length = 60m x 4unit ( 3 Piers) Reduced Percentage of Pier works = (2/5)x100
Decrease of Periods
40.0% Reduce
Periods Reduce (assumption B=24m, L=180m) PSC Beam’s Construction Periods = 534 days BH Girder’s Construction Periods = 211 days Reduced Percentage of Periods = (323/534)x100
60.5% Reduce
Reduce of CO2 Footprint B=24.0m, L=180.0m (In South Korea) 48t-CO2
17t-CO2
4240 t-CO2
3072
1,199 Ton
PSC 30m Remicon
t-CO2
BH 60m Oil
Design & Construction Applying Results Design Applying Results Hwayang – Jeokgeum Expressway Seoul – Moonsan Expressway Pyeongtaek East Detour Way Sejong Special Self-Governing City Rural Development Administration Relocation The Second Seoul-Incheon Expressway Asan Tangjeong District Development Kimhae Technovalley Development Oksan – Ochang Expressway Hwasung Dongtan District Development
Construction Applying Results Seoul – Moonsan Expressway Sejong Special Self-Governing City Rural Development Administration Relocation Kimhae Technovalley Development
Se-Jong Special Self Governing City Salvage Working Process
Preparation
Girder Loading
Transporting
1st Girder Lifting
1st Girder Installation
2nd Girder Lifting
Se-Jong Special Self Governing City The First BH Girder
Pier Height = 27.0m, Span = 57.0m
Coping Rebar Pre-Assembling Introduction of Technology Concept Pre-Assembling on the Ground Weight Lightening of Pre-Assembling Form Applying of Shape Change Available Form
Process 1. Set and Install Pre-Assembling Forms 2. Pre-Assemble Rebars on the Ground 3. Lift the Pre-Assembled Rebar-Net 4. Insert the Rebar-Net on Coping Form in Advance
Expectation Reduction of Construction Period : 35% Reduce Reduction of Construction Cost : 24% Reduce Minimize of Influence about Traffic Flow Improvement of Workability and Safety
PSC Trough(Lower Route) Bridge Introduction of Technology Concept Available for 45m High-Speed Railway Producing by Pre-Stressed Beam Method Possession of Trough(Lower Route) Bridge Less than 4m of Girder Height (Max. Height) Available for Double Track Railway
Single Track Railway
Expectation Reduction of Construction Period : 20% Reduce Reduction of Construction Cost : 30% Reduce Prevent of Noise Secure Spaces under the Bridge Train Fall Prevent Effect
