浅埋盾构隧道开挖面失稳大比尺模型试验研究

李姣阳; 刘维; 邹金杰; 赵宇; 龚晓南

doi:10.11779/CJGE201803022

浅埋盾构隧道开挖面失稳大比尺模型试验研究 English Version

李姣阳¹,
刘维^2,1, ,,
邹金杰³,
赵宇⁴,
龚晓南¹

1. 浙江大学滨海和城市岩土工程研究中心,浙江杭州 310058;
2. 苏州大学城市轨道交通学院,江苏苏州 215131;
3. 中国电建集团华东勘测设计研究院,浙江杭州 310014;
4. 浙江大学防灾工程研究所,浙江杭州 310058

基金项目: 国家自然科学基金青年基金项目（51508503）; 国家自然科; 学基金重大研究计划项目（51338009）

详细信息

作者简介:
李姣阳(1990-),男,河南漯河人,硕士,助理工程师,主要从事铁路工程勘察设计工作。E-mail:ljy_void@163.com。

通讯作者:
刘维，E-mail：ggoulmmeng@suda.edu.cn

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出版历程
- 收稿日期: 2016-09-06
- 发布日期: 2018-03-24

Large-scale model tests on face instability of shallow shield tunnels in sand

1. Research Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou 310058, China;
2. School of Urban Rail Transportation, Soochow University, Suzhou 215131, China;
3. Power China Huadong Engineering Corporation, Hangzhou 310014, China;
4. Institute of Disaster Prevention Engineering, Zhejiang University, Hangzhou 310058, China

摘要

摘要: 盾构隧道施工过程中支护压力不足会引起开挖面失稳。针对浅埋盾构隧道,采用大比尺物理模型试验对盾构开挖面稳定进行研究。试验通过控制支护板移动速度来模拟开挖面失稳变形过程,并对支护压力和地表变形进行监测,发现了支护力和地表变形发展的3个阶段。与此同时,采用数码摄像技术对失稳土体实时观测,并利用颗粒图像技术对图像进行处理得到失稳土体的位移增量场。对比发现,位移增量场的变化规律与支护力和地表变形的3个阶段相对应。
- 盾构隧道 /
- 开挖面失稳 /
- 大比尺模型试验 /
- PIV技术 /
- 地层变形 /
- 位移增量场
Abstract: The failure of tunnel face will occur if the support pressure is insufficient in tunneling. Large-scale model tests on the face stability are conducted for shallow shield tunnels. The collapse of the tunnel face is studied under different velocities of the panel. At the same time, the support pressure and surface deformation are monitored, and the three development stages of the support pressure and surface deformation are discovered. Meanwhile, the digital image correlation is used for the real-time observation and the technology of particle image velocity is further used to deal with the images, thus deriving the incremental displacements of instability soils. It is found that the variation rules of increment displacements are in correspondence with the three development stages of the support pressure and surface deformation.
- shield tunnel /
- face instability /
- large-scale model test /
- PIV method /
- soil deformation /
- incremental displacement

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参考文献(24)

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