A simplified analysis method for earth berm in foundation pit

YIN Sheng-bin

doi:10.16285/j.rsm.2016.02.026

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A simplified analysis method for earth berm in foundation pit

更新时间：2026-06-25

- A simplified analysis method for earth berm in foundation pit
- Vol. 37, Issue 2, Pages: 524-536(2016)
- 作者机构：
  
  1. 深圳市城市空间规划建筑设计有限公司上海分公司,上海,200122
  2. 天津大学建筑工程学院,天津,300072
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2016.02.026
  CLC： TV551.4
- Online First：09 June 2018，
  
  Published：2016
- 稿件说明：
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YIN Sheng-bin. A simplified analysis method for earth berm in foundation pit[J]. 2016, 37(2): 524-536.
DOI：

YIN Sheng-bin. A simplified analysis method for earth berm in foundation pit[J]. 2016, 37(2): 524-536. DOI： 10.16285/j.rsm.2016.02.026.

摘要

利用有限元软件对基坑预留土台对围护结构的内力及变形的影响规律进行研究，并对预留土台作用下围护桩的内力及变形的简化计算方法进行探讨。分析结果表明，预留土台的存在对减小围护桩的内力及变形具有显著的作用，且随着预留土台宽度、高度的增大，围护桩的内力及变形呈明显的减小趋势，但当预留土台宽度增大至约1倍开挖深度时，围护桩的变形逐渐趋于稳定。当计算预留土台作用下的围护桩变形及内力时，先利用弹性地基梁法计算该开挖深度下的围护桩的变形及内力，然后乘以预留土台的面积折减系数，即可得到预留土台作用下的围护桩变形及内力。经实际工程验证，采用该简化计算方法可较为简便地计算预留土台作用下围护桩的内力及变形。

Abstract

The interaction between earth berm and retaining structure is analyzed with finite element method. A simplified method is proposed to consider the effect of earth berm on the retaining pile. The calculated results show that the existence of earth berm has a significant influence on reducing the internal force and displacement of retaining pile. The internal force and displacement of retaining pile decrease with the increase of the width or height of earth berm. The pile deformation gradually tends to steady when the width of earth berm increases to the excavation depth. The deformation and internal force of the retaining piles considering the effect of earth berm can be calculated by the following method. Firstly

the deformation and internal force of the retaining piles can be calculated by elastic foundation beam method without considering the effect of earth berm. Then the area reduction factor of the earth berm is calculated. Finally

the deformation and internal force can be calculated. Through actual engineering verification

the force and deformation of retaining structure can be more easily calculated by the simplified calculation method.

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