预应力锚杆柔性支护法力学行为影响的数值模拟研究

涂兵雄; 贾金青; 俞缙; 蔡燕燕; 刘士雨

doi:10.11779/CJGE2014S2025

预应力锚杆柔性支护法力学行为影响的数值模拟研究 English Version

1. 华侨大学岩土工程研究所,福建厦门 361021;
2. 大连理工大学海岸和近海工程国家重点实验室,辽宁大连 116024;
3. 重庆交通大学水利水运工程教育部重点实验室,重庆 400074

基金项目: 国家自然科学基金项目（51408242,51308234）; 福建省自然科学基金项目（2013J05079）; 重庆交通大学国家内河航道整治工程技术研究中心暨水利水运工程教育部重点实验室开放基金资助项目（SLK2014A02）

详细信息

作者简介:
涂兵雄(1984-),男,讲师,主要从事深基坑及高边坡支护技术方面的研究工作。E-mail: tubingxiong@163.com。

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出版历程
- 收稿日期: 2014-07-27
- 发布日期: 2014-07-27

Numerical simulation of influence on mechanical behavior of flexible retaining method with prestressed anchor

1. Geotechnical Engineering Institute, Huaqiao University, Xiamen 361021, China;
2. State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China;
3. Key Laboratory of Hydraulic and Waterway Engineering of the Ministry of Education, Chongqing Jiaotong University, Chongqing 400074, China

摘要

摘要: 在岩质深基坑及超深基坑中,预应力锚杆柔性支护法具有造价低,工期短,施工简便,安全性高等诸多优点,经济效益和社会效益十分显著。结合大连胜利广场深基坑工程,采用FLAC软件进行数值模拟分析,重点研究了不同锚杆预应力对基坑力学行为的影响。结果表明：锚杆的预应力较小时,预应力越大,基坑侧壁的水平变形和地表的竖向沉降越小;预应力较大时,预应力的继续增加已不能进一步降低水平变形和减小竖向沉降;锚杆的预应力能有效减小岩土体内的最大剪切应变增量,在一定程度上延缓基坑剪切滑移破坏的发生;锚杆预应力存在一个合理的界限值。本文关于应力锚杆柔性支护法的设计方案及数值模拟研究结果对该技术的推广和应用提供了很好的借鉴作用。
- 预应力锚杆 /
- 深基坑 /
- 数值模拟 /
- 力学行为
Abstract: The flexible retaining method with prestressed anchor has obvious advantages of low cost, quick and convenient in construction and great safety performance for deep and ultra-deep foundation pits in rocky soils. Its economic and social benefits are significant. Numerical simulation analysis is conducted for the deep foundation pit of Dalian Victory Square using the FLAC software. The influence of different anchor prestress forces on the mechanical behavior of foundation pit is mainly studied. The results show that the greater the prestress, the smaller the horizontal deformation of the foundation wall and the vertical settlment of the ground for small prestress force. The increasing prestress force does not further reduce the horizontal deformation and the vertical settlement for greater prestress force. The prestressed anchors can effectively reduce the maximum shear strain increment in the rock body and delay the onset of shear sliding failure of the foundation pit to a certain extent. There is a reasonable threshold value of anchor prestress force for the foundation pit. The proposed design method and numerical simulation results may provide great guidance for the promotion and application of flexible retaining method with prestressed anchor.
- prestressed anchor /
- deep foundation pit /
- numerical simulation /
- mechanical behavior

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参考文献(11)

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预应力锚杆柔性支护法力学行为影响的数值模拟研究 English Version

作者简介: 涂兵雄(1984-),男,讲师,主要从事深基坑及高边坡支护技术方面的研究工作。E-mail: tubingxiong@163.com。

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出版历程

Numerical simulation of influence on mechanical behavior of flexible retaining method with prestressed anchor

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出版历程

目录

作者简介:
涂兵雄(1984-),男,讲师,主要从事深基坑及高边坡支护技术方面的研究工作。E-mail: tubingxiong@163.com。