Taoyuan Railway Underground Project CJ13 Adopts Short Wing-Flange Joints for Diaphragm Walls
Construction methods · Project management · AEC industry
For the Taoyuan railway undergrounding section CJ13, adjacent to tracks and residences in gravel layers, engineers planned diaphragm wall joints using short wing flanges instead of long ones, reducing trenching time by approximately 30% to mitigate collapse risks.
Section CJ13 of the Taoyuan railway undergrounding project involves diaphragm wall construction within 3 to 3.5 meters of operating tracks and residences, encountering thick gravel formations. To mitigate collapse risks from prolonged open trenching, the team evaluated joint configurations. For the T32 primary panel, adopting short wing flanges reduced excavation length from 6.6 m to 5 m and construction time from 32.5 hours to 23.5 hours (a 30% reduction), while welding an H-beam to the end plate preserved joint strength and watertightness.
Key takeaways
- Section CJ13 diaphragm walls border active rails in gravel, posing high collapse risks during long excavations.
- Adopting short wing flanges on T32 primary panels cuts cycle time from 32.5 to 23.5 hours while ensuring watertightness.
Source：台灣省土木技師公會｜技師報 Read the original ↗
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