Mechanism and Classification of Tectonic-induced Large Deformation of Soft Rock Tunnels

被引：0
作者：
Zhang G. [1 ]
Deng J. [2 ,3 ]
Wang D. [1 ,2 ,3 ]
Zhang R. [2 ,3 ]
Xu Z. [1 ]
Zhang Z. [2 ,3 ]
Feng J. [1 ]
Ren L. [2 ,4 ]
Jia Z. [1 ,2 ,3 ]
机构：
[1] China Railway Eryuan Eng. Group Co. Ltd., Chengdu
[2] Key Lab. of Deep Underground Sci. and Eng. for Ministry of Education, Sichuan Univ., Chengdu
[3] College of Water Resources & Hydropower, Sichuan Univ., Chengdu
[4] College of Architecture and Environment, Sichuan Univ., Chengdu
来源：
Deng, Jianhui (jhdeng@scu.edu.cn) | 1600年 / Sichuan University卷 / 53期
关键词：
Classification of large deformation; Large deformation of structural soft rock; Large deformation of surrounding rock; Patterns of large deformation;
D O I：
10.15961/j.jsuese.202000533
中图分类号：
学科分类号：
摘要：
Based on the analysis of large deformation cases of tunnel surrounding rock both at home and abroad, the present study found that the factors such as in-situ stress, geological structure and formation lithology are the basic conditions for the occurrence of large deformation of tunnel surrounding rock. Then, a concept of tectonic-induced large deformation of soft rock was proposed. According to the concept and mechanism of tectonic-controlled large deformation of tunnel surrounding rock mass, the classification of large deformation of soft rock in tunnel was redefined (fault type, fragmentation type and small angle type). Based on the ratio of rock strength and in situ stress, emphasizing the influence of structural movement, and considering five factors including stratum age, occurrence of dominant structural plane, rock strength, rock strata thickness and rock mass integrity, a new grading method for large deformation of tunnel surrounding rock in different geological exploration stages was proposed. The new grading method for tectonic-induced large deformation of tunnel surrounding rock mass proposed in this paper was systematically verified by employing 18 large deformation cases of Yakou tunnel, Yanbian tunnel, Xinlin tunnel and so on. Results demonstrated that the grading method proposed in the present study is reliable. The research results are of great importance for the understanding of the large deformation mechanism as well as the identification and control of large deformation disasters of tunnel surrounding rock mass. Copyright ©2021 Advanced Engineering Sciences. All rights reserved.
引用
收藏
页码：1 / 12
页数：11
相关论文
共 49 条
  • [1] Li Yonglin, Feng Xuegang, Jiang Yun, Et al., Large deformations encountered in the surrounding rocks of tunnels and their prediction, Modern Tunneling Technology, 42, 5, pp. 49-54, (2005)
  • [2] Lei Jun, Zhang Jinzhu, Lin Chuannian, Analysis of stress and deformation site—Monitoring in fault zone of Wushaoling tunnel under complex geological conditions, Rock & Soil Mechanics, 9, 5, pp. 1367-1371, (2008)
  • [3] Li Guoliang, Liu Zhichun, Zhu Yongquan, On the large squeezing deformation law and classification criteria for the Lanzhou—Chongqing railway tunnels in soft and high geostress rocks, Modern Tunneling Technology, 52, 1, pp. 62-68, (2015)
  • [4] Zhao Fushan, Technologies to control serious deformation of soft rocks with high ground stress:Case study on Liangshui tunnel on Lanzhou—Chongqing railway, Tunnel Construction, 34, 6, pp. 546-553, (2014)
  • [5] Li Tingchun, Large deformation control technology for Maoyushan tunnel in soft rock under high in-situ stresses, Modern Tunnelling Technology, 48, 2, pp. 59-67, (2011)
  • [6] Yan Hongjiang, Deng Zhigang, Large deformation control technology of high ground stress soft rock in Zhongyi tunnel of Lixiang railway, Journal of Water Resources & Architectural Engineering, 17, 1, pp. 67-72, (2019)
  • [7] Song Zhang, Jiang Liangwen, Du Yuben, Et al., Analysis on characteristic and formation mechanism of larger deformation for the tunnel of Chengdu—Lanzhou railway, Journal of Engineering Geology, 24, pp. 11-16, (2016)
  • [8] Wu Yongsheng, Tan Zhongsheng, Li Shaomeng, Experimental study on the basic characteristics of tunnel in squeezing surrounding rock with large deformation, China Civil Engineering Journal, 48, pp. 398-402, (2015)
  • [9] Mei Zhirong, Li Chuanfu, Zhang Junwei, Et al., Occurrence mechanism and control technology of large deformation in soft rock tunnel with high ground stress on Chengdu—Lanzhou railway, Modern Tunnelling Technology, 24, pp. 11-16, (2014)
  • [10] Wang Chenghu, Sha Peng, Hu Yuanfang, Et al., Study of squeezing deformation problems during tunneling, Rock & Soil Mechanics, 32, pp. 143-147, (2011)
12345