Physical model test and application of 3D printing rock-like specimens to laminated rock tunnels  

作　　者：Yun Tian Weizhong Chen Hongming Tian Xiaoyun Shu Linkai He Man Huang 

机构地区：[1]School of Civil Engineering,Shaoxing University,Shaoxing,312000,China [2]Key Laboratory of Rock Mechanics and Geohazards of Zhejiang Province,Shaoxing,312000,China [3]State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan,430071,China [4]College of Civil and Transportation Engineering,Hohai University,Nanjing,210024,China

出　　处：《Journal of Rock Mechanics and Geotechnical Engineering》2024年第11期4625-4637,共13页岩石力学与岩土工程学报（英文）

基　　金：support from the National Natural Science Foundation of China (Grant No.42207199);Zhejiang Provincial Postdoctoral Science Foundation (Grant Nos.ZJ2022155 and ZJ2022156).

摘　　要：Weak structural plane deformation is responsible for the non-uniform large deformation disasters in layered rock tunnels,resulting in steel arch distortion and secondary lining cracking.In this study,a servo biaxial testing system was employed to conduct physical modeling tests on layered rock tunnels with bedding planes of varying dip angles.The influence of structural anisotropy in layered rocks on the micro displacement and strain field of surrounding rocks was analyzed using digital image correlation(DIC)technology.The spatiotemporal evolution of non-uniform deformation of surrounding rocks was investigated,and numerical simulation was performed to verify the experimental results.The findings indicate that the displacement and strain field of the surrounding layered rocks are all maximized at the horizontal bedding planes and decrease linearly with the increasing dip angle.The failure of the layered surrounding rock with different dip angles occurs and extends along the bedding planes.Compressive strain failure occurs after excavation under high horizontal stress.This study provides significant theoretical support for the analysis,prediction,and control of non-uniform deformation of tunnel surrounding rocks.

关 键 词：Bedding plane Three-dimensional(3D)printing Physical model test Non-uniform deformation Digital imaging correlation(DIC) 

分 类 号：U455.7[建筑科学—桥梁与隧道工程]