Space effect of soil-nailing excavation protection

WU Zhi-min; TU Yu-min

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Space effect of soil-nailing excavation protection

更新时间：2026-06-25

- Space effect of soil-nailing excavation protection
- Vol. 28, Issue 10, (2007)
- 作者机构：
  
  浙江大学土木工程学系,杭州,310027
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU472.99
- Online First：15 October 2013，
  
  Published：2007
- 稿件说明：
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WU Zhi-min, TU Yu-min. Space effect of soil-nailing excavation protection[J]. 2007, 28(10).
DOI：

WU Zhi-min, TU Yu-min. Space effect of soil-nailing excavation protection[J]. 2007, 28(10). DOI：

摘要

利用三维弹塑性模型研究了土钉基坑支护的空间效应，着重对深基坑工程中的阴角、阳角及分段分层开挖等问题进行了计算分析。结果表明，基坑的阴角能大大降低基坑位移和土钉轴力，其影响范围大于开挖深度，直立开挖面的阴角效应比放坡开挖面时的要大；阳角处的位移及土钉轴力明显增大，其影响范围延伸至3倍基坑开挖深度；分段分层开挖支护能充分利用土钉支护的空间效应，其影响范围接近于基坑开挖深度。

Abstract

A three-dimension elastoplastic model had been developed to study the space effect of the soil-nailing excavation protection. The positive corner effect

negative corner effect and layered excavation were emphatically analyzed. The researches showed that: the negative corner of excavation could reduce the displacement of excavation and the force of soil-nail; and its influence was once more than the depth of the excavation; meanwhile

the displacement of the excavation and the force of soil-nailing were much larger in the positive corner; and its influence is near to 3 times of the depth of the excavation; the space effect of soil-nailing pit could be used plenarily by layered excavation; its influence was near to the depth of the excavation. It was proved that three-dimension numeric analysis of the soil-nail structure was very useable.

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