Shandong Science ›› 2022, Vol. 35 ›› Issue (6): 116-122.doi: 10.3976/j.issn.1002-4026.2022.06.015

• Traffic and Transportation • Previous Articles     Next Articles

Impact of foundation pit dewatering and excavation with suspended waterproof curtain on adjacent high-speed railway piers

LI Peng-ju1(), QIAN Lin-gen2, WU Qiang3, HUANG Shan4, CHEN Su4,*()   

  1. 1. China Railway 14th Bureau Group Co., Ltd., Jinan 250000, China
    2. Shanghai Shenyuan Geotechnical Engineering Co., Ltd., Shanghai 200040, China
    3. Suzhou Urban Railway Transit Line One Co., Ltd., Kunshan 215300, China
    4. School of Rail Transportation, Soochow University, Suzhou 215021, China
  • Received:2021-11-12 Online:2022-12-20 Published:2022-12-02
  • Contact: CHEN Su E-mail:540623738@qq.com;xiaowozi@hotmail.com

Abstract:

In the case of a deep aquifer, a suspended waterproof curtain is typically used in foundation pit engineering. The depth of the waterproof curtain exerts a crucial impact on the deformation of surrounding surface and buildings owing to dewatering and excavation of foundation pit. To study the impact of the dewatering and excavation of foundation pit on the deformation of adjacent high-speed railway piers under different depths of the waterproof curtain, a three-dimension finite element software was used to numerically simulate the dewatering and excavation of a subway station foundation pit in Suzhou. Results show that with increasing depth of the waterproof curtain, the settlement of piers adjacent to the foundation pits gradually decreases. When the depths of the waterproof curtain are 41 and 91 m, the pier settlements of the high-speed railway are 31.88 and 4.18 mm, respectively. Moreover, the settlement of the pier meets the control requirements (≤5 mm) only if the depth of the waterproof curtain exceeds 91 m.

Key words: foundation pit, suspended waterproof curtain, dewatering and excavation, settlement for high-speed railway piers, numerical simulation

CLC Number: 

  • TV551.4