摘要
岩体质量Q系统未考虑隧道上覆不同地质条件岩土体位置关系的相互影响。阐述了岩体质量Q系统在进行围岩分级时存在的问题,基于摩尔-库伦强度准则,提出了计算隧道围岩松动区和承载区的公式,得出当隧道围岩等级越高,即围岩稳定性越差时,松动区外半径、承载区外半径以及塑性区外半径越大;通过将理论分析方法与数值模拟方法相结合,求出了隧道围岩重要性系数,提出了一种隧道围岩分级新计算公式。
The rock mass Q-system does not take into account the mutual influence of positional relation about the rock masses of the different geological conditions that overlying on the tunnel.The problems of rock mass Q-system in the classification of surrounding rock was expounded,and based on Mohr-Coulomb strength criterion,the formula of calculating the loose zone and bearing zone of tunnel surrounding rock was put forword,it was concluded that when the surrounding rock grade of the tunnel is higher,which means the surrounding rock stability is worse,the outer radius of the loose zone,the outer radius of the bearing zone and the outer radius of the plastic zone are larger.By combining theoretical analysis method with numerical simulation method,the importance coefficient of tunnel surrounding rock was obtained and a new calculation formula of tunnel surrounding rock classification was proposed.
作者
刘灯凯
饶军应
陈凯
谢财进
梁中勇
聂崇欣
LIU Deng-kai;RAO Jun-ying;CHEN Kai;XIE Cai-jin;LIANG Zhong-yong;NIE Chong-xin(School of Civil Engineering,Guizhou University,Guiyang 550025,China)
出处
《科学技术与工程》
北大核心
2019年第13期254-259,共6页
Science Technology and Engineering
基金
国家自然科学基金(51608141)资助
关键词
隧道工程
围岩分级
岩体质量Q系统
松动区半径
围岩压力
tunnel Engineering
classification of surrounding rock
rock mass Q-system
radius of loose area
surrounding rock pressure
