Calculation method of surrounding rock pressure of existing expansion shallow rock tunnel

被引：0
|
作者：
Bai Q. [1 ]
Zhao W. [1 ]
Wang X. [1 ]
Cheng C. [1 ]
Lu B. [1 ]
机构：
[1] School of Resources & Civil Engineering, Northeastern University, Shenyang
来源：
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2021年 / 52卷 / 05期
基金：
中国国家自然科学基金;
关键词：
Slip surface; Surrounding rock pressure; Tunnel engineering; Tunnel expansion;
D O I：
10.11817/j.issn.1672-7207.2021.05.017
中图分类号：
学科分类号：
摘要：
The numerical model was established based on the reconstruction and expansion project of Nanling tunnel, and the accuracy of the model was verified by comparing with the monitoring data. The stratum settlement curve of the expansion tunnel was fitted by using the numerical simulation, and a method for determining the slip surface was put forward when the surrounding rock was damaged. Then, the slip surface curve above the tunnel vault was simplified considering the friction on the inclined slip surface. Based on the Terzaghi theory, an improved calculation method of the surrounding rock pressure of the expansion tunnel was proposed, and the rationality and adaptability of the method were verified by comparing with the engineering examples. The results show that the pressure of surrounding rock calculated by the traditional Terzaghi theory is quite different from the measured value, while the results obtained by the improved calculation method of surrounding rock pressure are more consistent with the measured values, and the difference between the calculated result and the measured value is less than 3%. It has better applicability for the expansion tunnel and can estimate the surrounding rock pressure of the expansion tunnel in the construction process. © 2021, Central South University Press. All right reserved.
引用
收藏
页码：1562 / 1569
页数：7
相关论文
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