FEM analysis of vertical soil deformation caused by vacuum pumping

AI Ying-bo; LIU Jia-cai; SHI Jian-yong; LEI Guo-hui

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FEM analysis of vertical soil deformation caused by vacuum pumping

更新时间：2026-06-25

- FEM analysis of vertical soil deformation caused by vacuum pumping
- Vol. 28, Issue S1, (2007)
- 作者机构：
  
  1. 河海大学岩土工程水利部重点实验室,南京,210098
  2. 河海大学岩土工程研究所,南京,210098
  3. 南京工业大学,南京,210009
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU443
- Online First：28 March 2014，
  
  Published：2007
- 稿件说明：
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AI Ying-bo, LIU Jia-cai, SHI Jian-yong, et al. FEM analysis of vertical soil deformation caused by vacuum pumping[J]. 2007, 28(S1).
DOI：

AI Ying-bo, LIU Jia-cai, SHI Jian-yong, et al. FEM analysis of vertical soil deformation caused by vacuum pumping[J]. 2007, 28(S1). DOI：

摘要

真空预压法加固深厚超软土地基时，一方面使地基土体产生侧向收缩变形，有利于地基的稳定；但另一方面向真空预压区的侧向变形对周围房屋、地下管线、道路等建筑物也产生不利影响，甚至会出现管道断裂、围墙倒塌、路堤被毁等严重工程事故。结合真空预压加固软基工程中出现的对周围环境影响的问题，进行了考虑土体拉裂影响的有限元分析，研究抽真空过程及加固区外不同距离、不同土体深度沉降的变化规律。研究结果表明，采用Biot固结理论、考虑土体拉裂的有限元计算结果与现场加固区外土体沉降及影响区范围的实测结果基本一致。

Abstract

When deep and thick soft ground is improved by vacuum preloading

lateral contract deformations will be induced in the soils

and this is beneficial to ground stability. On the other hand

the lateral deformation towards the vacuum preloading area will have an adverse effect on the adjacent buildings

underground pipelines

road embankments and other structures. Serious engineering failures may take place

such as crack of the pipelines

collapse of the retaining walls

and damage of the road embankments. In order to investigate the impact of the vacuum preloading on the surrounding soils

FEM analysis has been carried out

considering the influence of soils’ tension crack. The variation behavior during the vacuum preloading process is studied on the settlement at different depths and at different distances away from the preloading area. It has been found that the calculation results from the FEM analysis based on the Biot’s theory and the consideration of tension crack are consistent with the measurement results of the settlements and the extents of the influence outside the preloading area.

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Related Institution

School of Civil and Environmental Engineering, Harbin Institute of Technology

College of Civil Engineering, Zhejiang University of Science and Technology

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Key Laboratory of Soft Soils and Engineering Environment of Tianjin, Tianjin Chengjian University

Tianjin Bochan Construction Engineering Co., Ltd.

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