bh girder presentation in jakarta
DESCRIPTION
BHTRANSCRIPT
BH GIRDER
TOWOONG E&C
Universities U.C. Davis (USA)
Prof. Jonh Bolander
Yonsei University (Korea)
Prof. Yunmook Lim
Research Institute GS E&C Corporation
Infrastructure Research Team
Towoong E&C
Research Center
Structural Designer
Eurim E&D
Sambo Engineering
Yooshin Corporation
BH GIRDER
BH GIRDER
Bulb-Tee Shape
Pre-Stress Optimization
Intermediate Anchoring Device
Half-Slab
Girder Continuation
BH Girder Outlines
Advanced Bulb-T Shape
Bulb-Tee Shape (PCI) Bulb-Tee Shape (BH Girder) Comparison
PCI BH Girder (47.2m)
Span 47.2 60.0 (47.2)
Spacing 2.40 2.50(2.50)
Upper Flange Width
Lower Flange Width
1.19 2.20(2.20)
0.81 1.40(1.30)
Height 2.362 2.300
(1.900)
Half-Slab
Replacement of Slab Thickness 100mm
Immediately Concrete Placing after Girder Set
Contribute to Girder Stiffness Increasing
Improvement of Workability and Safety
Replace a Form with Half-Slab
Pre-stress Optimization
Straight Tendon Arrangement
Minimize of Friction Loss
Intermediate Tendon Arrangement
Maximization of PS Efficiency
Minimize of Long Term Loss
Simple Continuation
Other Type Continuation Method BH Girder Continuation Method
Existing Continuation Method
Rebar Only or Extra PSC Continuation Method
Rebar Only : Crack Occurrence
Extra PSC : 3Span Over Continuation Impossible
BH Girder’s Continuation Method
Choice of a Simple Method
Need not Considering Girder when Continuation
Beneficial Way for Designing and Construction
For Reduce of Expansion Joint
Finite Element Analysis
End-Section Anchorage Intermediate Anchorage Continuation Part
RM Space RBSN (Rigid Body Spring Network)
Launching Girder
Uijeongbu Light Railway
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
Launching Application Analysis for BH Girder
UiJeongBu Light Railway Construction Site
Construction Process
BH Girder and PSC-I Beam(PCI)
PSC-I Beam’s Cross Section (PCI)
BH Girder’s Cross Section
Comparison
PCI-I BH Girder
Span 41.1 41.1
Spacing 2.40 2.50
Upper Flange Width
Lower Flange Width
1.07 2.20
0.71 1.30
Height 1.829 1.500
BH Girder and PSC-I Beam (Beton)
PSC-I Beam’s Cross Section (Beton)
BH Girder’s Cross Section
Comparison
Beton BH Girder
Span 47.0 47.0
Spacing 2.30 2.50
Upper Flange Width
Lower Flange Width
0.80 2.20
0.70 1.30
Height 2.300 1.900
Comparison
U-Girder BH Girder
Span 31.9 31.9
Spacing 2.30 2.50
Upper Flange Width
Lower Flange Width
1.90 2.20
1.30 1.30
Height 1.850 1.400
BH Girder and U-Girder
U-Girder’s Cross Section (Indonesia)
BH Girder’s Cross Section
Comparison
Super-T BH Girder
Span 40.0 40.0
Spacing 2.25 2.50
Upper Flange Width
Lower Flange Width
1.96 2.20
0.70 1.30
Height 1.750 1.500
BH Girder and Super-T Beam
Super-T Beam’s Cross Section
BH Girder’s Cross Section
Rule Out of Form and Supporting post
Conventional Slab Working Method
Threaten the Safety
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
Improvement of Safety
Maintain Slab Surface Smoothness
Decked Bulb-T Girder Safety Working with Half-Slab
Full Deck Bulb Tee Beams Half Deck Bulb Tee Beams
Difficult to Compensate for Surface Deviations
Difficult to Girder Setting in Narrow Interval
Remaining Hazards like Overturn
Remaining Risks with Beam Structure Damaging
Available to Compesate for Physical Deviations
Available to Girder Interval
Safe to Overturn
Safe to Beam Structure Damaging
The Lowest Height
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
Earthworks Reduction Amount
BH Girder’s Height PSC Beam(PCI)’s Height
The Longest Length among PSC Beams
Suppose Constructing 240m Bridges… (in South Korea)
Other PSC Beams with 40m
BH Girder with 60m
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
Total Saving Costs = about 510,000 USD
Reduce Construction Periods
B=24.0m, L=180.0m
PSC-I Beam 30.0m
Pier Construction
390 Days Girder Installation
60EA/4Days
Slab Construction
140 Days
PSC-I Beam 45.0m
Pier Construction
234 Days
Girder Installation
40EA/3Days
Slab Construction
140 Days
BH Girder 60.0m
Pier Construction
156 Days
Girder Installation
30EA/3Days
Slab Construction
52 Days
534 Days
377 Days
211 Days
60% ~44%
Construction Costs Reduction
Decrease of
Earthworks
Decrease of
Piers
Decrease of
Periods
PCI Bulb T Beam’s Height (Length= 47.2m) = 2.362m
BH Girder’s Height (Length = 47.2m) = 1.800m (except Half-Slab)
Reduced Percentage of Earthworks = (0.562/2.362)x100
Earthworks Reduce (compared with PCI Bulb-T)
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
Pier Works Reduce (assumption L=240m)
PSC Beam’s Construction Periods = 534 days
BH Girder’s Construction Periods = 211 days
Reduced Percentage of Periods = (323/534)x100
Periods Reduce (assumption B=24m, L=180m)
60.5%
Reduce
23.8% Reduce
40.0%
Reduce
Reduce of CO2 Footprint
PSC 30m
Remicon
BH 60m
Oil
4240
t-CO2
48t-CO2
3072
t-CO2
17t-CO2
B=24.0m, L=180.0m (In South Korea)
1,199 Ton
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
1st Girder Installation
Se-Jong Special Self Governing City
Salvage Working Process
Preparation Girder Loading Transporting
1st Girder Lifting 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
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
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
Double Track Railway
Single Track Railway
Concept
GS E&C Corporation
Senior Research Engineer
Kim, Do-Hak
Towoong E&C
General Manager
Yoon, Seok-Min