Laboratory model tests and finite eleent analysis of soil nails-anchors supporting technique of foundation pit excavation

WANG Yi-zhong1; 2; WANG Qi-yong1; 2; LIU Huan3; FU Xu-dong1; 2

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Laboratory model tests and finite eleent analysis of soil nails-anchors supporting technique of foundation pit excavation

更新时间：2026-06-25

- Laboratory model tests and finite eleent analysis of soil nails-anchors supporting technique of foundation pit excavation
- Vol. 32, Issue S2, (2011)
- 作者机构：
- 作者简介：
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- DOI：
  CLC： TU433
- Online First：26 August 2011，
  
  Published：2011
- 稿件说明：
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WANG Yi-zhong1, 2, WANG Qi-yong1, et al. Laboratory model tests and finite eleent analysis of soil nails-anchors supporting technique of foundation pit excavation[J]. 2011, 32(S2).
DOI：

WANG Yi-zhong1, 2, WANG Qi-yong1, et al. Laboratory model tests and finite eleent analysis of soil nails-anchors supporting technique of foundation pit excavation[J]. 2011, 32(S2). DOI：

摘要

土钉复合土锚杆支护技术是对单一土钉墙技术的发展与改进，该方法具有施工简便，工期短，造价低廉等独特优点。虽然该方法已在工程中应用广泛，但土钉与土锚杆的复合支护的理论却还不完善。因此很有必要开展土钉墙复合土锚杆的模型试验，以加深对土钉与土锚杆复合支护体系的认识。通过多组模型试验，研究了在不同加载位置以及不同施工阶段下土钉的内力分配，基坑土体的位移场分布，不同加载位置下土钉及锚杆的支护效果等。结果表明：当超载较大且靠近基坑坑壁时，易出现直线型的滑动面，而超载距离坑壁较远，则较易出现圆弧状滑动面；锚杆对于控制滑动面出现有较强的作用，因此当超载靠近坡面时应将锚杆布置在坡面中上部，超载离坡面较远时，应布置在坡面下部

Abstract

The composite supporting technology of soil nailing and bolting was developed from soil nailing technology; this technology is simple in construction

short construction period

low cost and has some other unique advantages. Although it has been widely used in engineering

but the theory of the composite supporting system is still imperfect and needs to be improved. Therefore it is essential to carry out model tests to deepen the knowledge of the composite system of soil nails and anchors. Through multiple sets of model tests

the internal force distribution of soil nailing

foundation soil displacement field are obtained in different loading locations and different construction stages. The effect of the support has been evaluated. The results show that: if there is a large additional load very close to the pit slope

a straight line sliding surface is prone to occur; otherwise

usually occurs a arc-shaped one. Soil anchors is very effective to prevent the slip surface occur through the slope

so if the additional load is close to the slope

anchors should be arranged in the middle and upper positions of the slope; if the addtional load is far from the slope

anchors should be arranged in the lower position instead.

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Related Institution

The Third Research Institute of the Corps of Engineering, General Staff of PLA

Department of Modern Mechanics, University of Science and Technology of China

State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences

School of Architecture and Environment, Sichuan University

School of Water Resource & Hydropower, Sichuan University

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