Analysis of initial rock stress field and secondary rock stress field of Xuefengshan tunnel

被引：0

作者：

Huang, Kan ^{[1
,2
]}

Peng, Jian-Guo ^{[2
]}

Liu, Bao-Chen ^{[1
]}

Ding, Guo-Hua ^{[2
]}

Wang, Yue-Fei ^{[2
]}

Ma, De-Qing ^{[2
]}

机构：

[1] School of Civil Engineering and Architecture, Central South University, Changsha 410075, China

[2] Hunan Provincial Communication Planning Survey and Design Institute, Changsha 410008, China

来源：

Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2011年 / 42卷 / 05期

关键词：

Rocks - Excavation - Numerical models - Tunnels - Finite element method;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

To understand initial rock stress field and secondary rock stress field due to excavation in Xuefengshan tunnel, finite element software was used to establish numerical model to simulate the valley incision and tunneling process. In order to verify the reliability of the numerical model, comparison of stress numerical values and monitoring values in field tests was conducted, and the stress boundary was done. The results show that the model is reliable because numerical simulation stress is close to that of the field test. The spread of stress can be divided into two bands, i.e., the equable stress band and the effected band of epigentic-surface reformation. Around fracture in the equable stress band, there are stress varied phenomena and local high stress bands in the effected band, especially at the position of apparent landform chance. Stress concentration is serious around the tunnel. With the increase of the distance from the tunnel, the maximum principal stress decreases rapidly. Tensile stress does not appear around the tunnel, and the excavation influence band is from 0 to 1 times of the hole diameter.

引用

页码：1454 / 1460