Loess water-enriched area roadbed expansion low-soil-extrusion resistance and recyclable supporting structure
By combining the design of asymmetric variable cross-section pile body, streamlined wedge-shaped pile tip and hydrophobic anti-friction coating, the problem of soil displacement and settlement of steel sheet piles in the roadbed expansion in the loess water-rich area was solved, and a low-cost, safe and recyclable support structure was realized.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- LANZHOU JIAOTONG UNIV
- Filing Date
- 2026-06-11
- Publication Date
- 2026-07-17
AI Technical Summary
In the process of constructing and expanding new roadbeds in the loess-rich water-rich areas, traditional steel sheet piles suffer from soil displacement during pile driving and settlement during pile extraction. Furthermore, they cannot be recycled, resulting in high construction costs and safety hazards.
The design employs a combination of asymmetric variable cross-section pile body, streamlined wedge-shaped pile tip, embedded micro pressure relief groove and hydrophobic anti-friction coating, combined with low-speed pile driving and self-lubricating labyrinth lock, to form a continuous water-stop curtain wall, reducing soil squeezing effect and diverting groundwater during pile extraction, thereby reducing frictional resistance.
It enables construction on existing roadbeds at zero speed, avoids soil displacement and settlement, and the steel sheet piles can be recycled more than 20 times, reducing construction costs and improving safety.
Smart Images
Figure CN122406607A_ABST