深基坑开挖土体扰动及其对邻近地铁隧道的影响分析

胡琦; 许四法; 陈仁朋; 冉龙

深基坑开挖土体扰动及其对邻近地铁隧道的影响分析 English Version

1. 浙江工业大学建筑工程学院,浙江杭州 310014; 2. 浙江大学软弱土与环境土工教育部重点实验室,浙江杭州 310058; 3. 杭州地铁集团,浙江杭州3100031

基金项目: 国家自然科学基金项目（51108417,51225804,U1234204）

详细信息

作者简介:
胡琦(1978- )，男，江西南城人，博士，副教授，硕士生导师，主要从事软黏土力学、基坑工程等方面的研究与教学工作。E-mail: huqi@zju.edu.cn。

中图分类号: TU47
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出版历程
- 收稿日期: 2013-07-16
- 发布日期: 2013-11-24

Influence of soil disturbance on metro tunnel in soft clay due to excavation of deep foundation pit

1. College of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou 310014, China; 2. MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering, Zhejiang university, Hangzhou 310058, China; 3. Hangzhou Metro Group, Co., Ltd., Hangzhou 310003, China

摘要

摘要: 通过杭州地区典型软黏土及其扰动土的室内单元体试验,研究了扰动对软黏土工程特性的影响。试验结果表明,软黏土的工程特性与土的结构性和应力状态有关,受施工扰动的影响,土的结构屈服应力被破坏,导致土的压缩性增大、强度降低。深基坑开挖会对坑内软弱土地基产生扰动,扰动后地基土的强度降低、变形性增大,会加剧基坑开挖施工对周边环境的影响。通过有限元数值模拟,研究了软黏土地基中深基坑开挖土体扰动对地铁隧道受力变形的影响,并提出了相应的加固处理措施建议。分析结果表明：当基底土受到扰动,围护结构与邻近的地铁隧道结构受力变形均会呈现出加速发展的趋势,直至发生破坏。
- 深基坑 /
- 隧道 /
- 软土 /
- 扰动
Abstract: According to the laboratory unit tests on typical soft clay and disturbed soils, the influence of disturbance on the soft clay is analyzed. The results show that the engineering properties of the soft clay are related to its structure and stress state. Due to the disturbance of construction, the yield stress of the soil structure is destroyed, resulting in an increase of its compressibility and a decrease of its strength. Deep excavation will result in disturbance of soft soil foundation, reduce the strength of foundation soils and increase the deformation and exacerbate the impact of construction on the surrounding environment. According to the finite element simulation, the influence of soft clay disturbance on the force-deformation of surrounding metro tunnel is analyzed, and some suggestions for reinforcement measures are proposed. When the base soils are disturbed, the force-deformation of building envelope and nearby metro tunnel structure will be accelerated until failure occurs.
- deep foundation pit /
- tunnel /
- soft clay /
- disturbance

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参考文献(13)

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