岩石质量指标对隧道稳定性的影响研究  

Study on the Influence of Rock Quality Designation on Tunnel Stability

作　　者：宋鹏飞 张程 李智 刘广 熊斌 范兵 周应权 蒋金宏 SONG Pengfei;ZHANG Cheng;LI Zhi;LIU Guang;XIONG Bin;FAN Bing;ZHOU Yingquan;JIANG Jinhong(China Construction Tunnel Co.,Ltd.,Chongqing 401320,China;School of Civil Engineering,Chongqing University,Chongqing 400045,China;Chongqing Jiangnan Urban Construction and Development(Group)Co.,Ltd.,Chongqing 400000,China)

机构地区：[1]中建隧道建设有限公司,重庆401320 [2]重庆大学土木工程学院,重庆400045 [3]重庆市江南城市建设发展(集团)有限公司,重庆400000

出　　处：《施工技术（中英文）》2024年第21期90-95,共6页Construction Technology

基　　金：中建五局重点课题:钻爆法隧道喷射混凝土降耗及变断面快速施工关键技术研究与应用(cscec5b-2022-28)。

摘　　要：为研究岩石质量指标(RQD)变化对隧道稳定性的影响,依托江南隧道工程,采用数值模拟计算方法,分析了隧道发生岩爆时不同RQD值和节理倾角下围岩环向应力、动能及最大速度变化规律。研究结果表明,不同RQD值和节理倾角下,初始地应力为75MPa时的围岩环向应力峰值、最大动能均较初始地应力为55MPa时大;围岩破坏程度随着节理倾角的增大而增大;围岩动能基本随着RQD值的增大逐渐减小,随着地应力的增大逐渐增大;当初始地应力为55,75MPa时,围岩最大速度在RQD值为62,72,82时存在极值,在RQD值为92时存在最小值。In order to study the influence of rock quality designation(RQD)on tunnel stability,based on the Jiangnan Tunnel project,numerical simulation calculation methods were used to analyze the circumferential stress,kinetic energy and maximum velocity of surrounding rock under different RQD values and joint dip angles during rock burst in the tunnel.The research results show that under different RQD values and joint dip angles,the peak circumferential stress and maximum kinetic energy of surrounding rock at an initial geostress of 75MPa are higher than those at an initial geostress of 55MPa.The degree of surrounding rock damage increases with the increase of joint dip angles.The kinetic energy of surrounding rock gradually decreases with the increase of RQD values and increases with the increase of geostress.When the initial geostress is 55,75MPa,the maximum velocity of the surrounding rock has extreme values at RQD values of 62,72,82,and a minimum value at RQD value of 92.

关 键 词：隧道 围岩 环向应力 节理倾角 稳定性 

分 类 号：U45[建筑科学—桥梁与隧道工程]