Field pumping test and soil layer deformation analysis of super large scale deep foundation pit engineering

LAN Wei; WANG Wei-dong; CHANG Lin-yue

doi:10.16285/j.rsm.2021.1374

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Field pumping test and soil layer deformation analysis of super large scale deep foundation pit engineering

更新时间：2026-06-25

- Field pumping test and soil layer deformation analysis of super large scale deep foundation pit engineering
- Vol. 43, Issue 10, Pages: 2898-2910(2022)
- 作者机构：
  
  1. 华建集团上海地下空间与工程设计研究院,上海,200000
  2. 上海申元岩土工程有限公司,上海,200040
  3. 华东建筑设计研究院有限公司,上海,200002
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2021.1374
  CLC： TU46
- Online First：18 October 2022，
  
  Published：2022
- 稿件说明：
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LAN Wei, WANG Wei-dong, CHANG Lin-yue. Field pumping test and soil layer deformation analysis of super large scale deep foundation pit engineering[J]. 2022, 43(10): 2898-2910.
DOI：

LAN Wei, WANG Wei-dong, CHANG Lin-yue. Field pumping test and soil layer deformation analysis of super large scale deep foundation pit engineering[J]. 2022, 43(10): 2898-2910. DOI： 10.16285/j.rsm.2021.1374.

摘要

承压水抽降是深基坑工程面临的主要难题之一。群井抽水试验是合理分析基坑工程承压水水位降深和地表沉降的主要手段，具有重要意义。以上海某航站楼区域大规模深基坑现场抽水试验为例，结合场地工程地质和水文地质条件，对群井抽水过程中承压水水位变化及地表沉降进行分析，探究承压水水位降深对地层压缩及地表沉降的影响规律。结果表明：300 m监测范围内，地面沉降最大值为104.9 mm，最大水位降深为 21.85 m，每米水位降深（即单位水位降深）引起的地面沉降量约为5 mm；⑦层的最大土层压缩量为68.4 mm，单位水位降深引起的压缩量约为 3 mm；单位水位降深引起的地面沉降量随距离增加有减小的趋势，距离中心40～310 m范围内，单位水位降深引起的地面沉降量为4.22～1.17 mm。

Abstract

Pumping of confined water is one of the main problems faced by deep foundation pit engineering. And group well pumping test is the main method to reasonably analyze the drawdown of confined water and surface settlement around foundation pit engineering

which is of great significance. A large-scale deep foundation pit pumping test in the area of a terminal in Shanghai was selected as an example in this study. Combined with the engineering geology and hydrogeological conditions of the site

the confined water level change and surface settlement during the group well pumping tests were analyzed. The influence of the drawdown of confined water on soil layer compression and ground settlement were investigated. The results showed that within the monitoring range of 300 m

the maximum ground settlement was 104.9 mm

the maximum drawdown was 21.85 m

and the ground settlement caused by the drawdown per meter was about 5mm. The maximum compression of 7th soil layer was 68.4 mm

and the compression caused by one meter of drawdown was about 3 mm. The ratio of settlement to drawdown tended to decrease with the increase of distance

and within the range of 40−310 m from the center

the ratio of settlement to drawdown was 4.22−1.17 mm.

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Department of Civil Engineering, Zhejiang University City College

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