文献类型：期刊文献

英文题名：Effect of horizontal stress on the mesoscopic deformation and failure mechanism of layered surrounding rock masses in tunnels

作者：Tian, Yun[1,2,3];Shu, Xiaoyun[4,5];Tian, Hongming[4];He, Linkai[1,2,3];Jin, Yi[3];Huang, Man[1,2]

机构：[1]Shaoxing Univ, Sch Civil Engn, Shaoxing 312000, Zhejiang, Peoples R China;[2]Key Lab Rock Mech & Geohazards Zhejiang Prov, Shaoxing 312000, Peoples R China;[3]Henan Polytech Univ, Sch Resources & Environm, Jiaozuo 454003, Peoples R China;[4]Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China;[5]Hohai Univ, Coll Civil & Transportat Engn, Nanjing 210024, Jiangsu, Peoples R China

年份：2023

卷号：148

外文期刊名：ENGINEERING FAILURE ANALYSIS

收录：SCI-EXPANDED(收录号：WOS:000979768600001)、、EI(收录号：20231513865655)、Scopus(收录号：2-s2.0-85151704810)、WOS

基金：Acknowledgments The authors gratefully acknowledge the support of the National Natural Science Foundation of China (Grant Nos. 42207199, 52179113, 42272333) , Zhejiang Provincial Natural Science Foundation of China (Grant No. LQ23D010002) , Zhejiang Provincial Postdoctoral Science Foundation (Grant Nos. ZJ2022155, ZJ2022156) . The authors are grateful to Professor CHEN Weizhong, Institute of Rock and Soil Mechanics, for his kind help in this study.

语种：英文

外文关键词：Layered rock tunnels; 3D printed rock -like materials; Digital imaging correlation; Physical and numerical simulations; Asymmetric deformation; Failure mechanism; Yielding support and active reinforcement

外文摘要：The deformation and failure behaviors of layered surrounding rocks under high in-situ stress are important indicators for tunnel stability evaluation. The attitude of bedding planes is too complex, which impedes the understanding of the rock deformation mechanism under different horizontal stress, especially from the microscopic perspective. In this study, high-precision and easy-to-prepare 3D printing materials are used to simulate layered rock masses. The biaxial loading test system is adopted to explore the creep properties of layered rocks during tunnel excavation in the case of different horizontal stress. The mesoscopic deformation field and failure evolution mechanism of the layered surrounding rocks are revealed using digital image correlation technology. The test results are verified with the numerical simulation method. The shear displacement and plastic strain zone of surrounding rocks in the case of different layer dip angles are studied, and the plastic failure region is given. This paper provides significant experimental and theoretical guidance for the excavation and support of layered soft rock tunnels.