Numerical Analysis of the Effect of Excavation on Bearing Capacity of Neighboring Soils

陈福全; 苏锋

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Numerical Analysis of the Effect of Excavation on Bearing Capacity of Neighboring Soils

更新时间：2025-12-11

- Numerical Analysis of the Effect of Excavation on Bearing Capacity of Neighboring Soils
- Issue 4, Pages: 468-472+483(2008)
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  CLC： U470
- Published：2008
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[1]陈福全,苏锋.基坑开挖对临近地基极限承载的影响性状数值分析[J].防灾减灾工程学报,2008(04):468-472+483.

陈福全, 苏锋. Numerical Analysis of the Effect of Excavation on Bearing Capacity of Neighboring Soils[J]. 2008, (4): 468-472+483.
[1]陈福全,苏锋.基坑开挖对临近地基极限承载的影响性状数值分析[J].防灾减灾工程学报,2008(04):468-472+483. DOI：

陈福全, 苏锋. Numerical Analysis of the Effect of Excavation on Bearing Capacity of Neighboring Soils[J]. 2008, (4): 468-472+483. DOI：

摘要

采用弹塑性有限元分析方法

分析了悬臂式排桩支护的基坑开挖对邻近地基条形基础下极限承载力的影响性状。主要考虑了在基坑开挖深度、荷载与基坑的距离、荷载宽度、支护刚度等因素的影响下地基极限承载力的减损性状。研究表明

基坑开挖深度H较浅时

对地基极限承载力Pu的影响较小

Pu随H的增大略有降低

随着开挖深度的增加

H对Pu值的影响显著增大

且Pu值显著降低;当L/H≤2时

荷载与基坑的距离L对地基极限承载力Pu的影响很大

地基极限承载力Pu随L的减小而显著减小

当L/H>3时

L的影响逐渐减小

且Pu逐渐趋近于无基坑开挖时的值;Pu随地基荷载作用宽度B的增大而呈线性增大;支护桩的位移越小

Pu值越接近无基坑开挖时的地基极限承载力。

Abstract

Using an elastic-plastic finite element method

the effect of excavation on bearing capacity of neighboring soils under a rigid strip footing was investigated to analyze the influence of such factors as ex- cavating depth

distance between load and excavated pit

load width

un-drained shear strength of soil and bracing stiffness.It shows that the un-drained shear strength of soil

the load position and excavating depth all have great effects on the ultimate bearing capacity

but the influence of bracing stiffness is rela- tively small.The ultimate bearing capacity decreases rapidly with the increasing of excavating depth and shortening of the distance between the rigid strip footing and excavation.And the uhimate bearing capaci- ty increases linearly with the un-drained shear strength of soil and load position.The bracing stiffness has little influence on the uhimate bearing capacity.

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references

内撑式支护的软土基坑开挖抗隆起稳定性分析 [J]. 陈福全,吕艳平,刘毓氚. 岩土力学 . 2008(02)

不排水双层粘性土地基极限承载力的数值分析 [J]. 吕艳平,陈福全,雷金山. 工程地质学报 . 2007(06)

临近基坑条形浅基础地基承载力减损的下限估算 [J]. 王红雨,杨敏. 岩土工程学报 . 2006(08)

临近基坑条形基础地基承载力减损性状的数值模拟 [J]. 王红雨,杨敏,王伟. 工业建筑 . 2006(06)

某基坑开挖对邻近高层建筑的影响分析及决策 [J]. 宋二祥,王连启,池跃君. 工程勘察 . 2001(04)

Response of Building Adjacent to Stiff Excavation Support System in Soft Clay [J] . Richard J. Finno,L. Sebastian Bryson. Journal of Performance of Constructed Facilities . 2002 (1)

Ground-Movement-Related Building Damage [J] . Storer J. Boone. Journal of Geotechnical Engineering . 1996 (11)

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