浅埋双侧偏压小净距隧道围岩压力计算与监测分析  

Theoretical calculation and monitoring on rock pressure of shallow-buried bilateral bias neighborhood tunnel

作　　者：钟祖良[1,2,3] 刘新荣[1,2] 刘元雪[3] 张建[1] 

机构地区：[1]重庆大学土木工程学院,重庆400045 [2]重庆大学山地城镇建设与新技术教育部重点实验室,重庆400045 [3]后勤工程学院建筑工程系,重庆400041

出　　处：《重庆大学学报（自然科学版）》2013年第2期63-68,共6页Journal of Chongqing University

基　　金：重庆市科委自然科学基金资助项目(CSTC,2009BB6350);国家自然科学基金资助项目(51108485),国家自然科学基金李晓红创新群体基金资助项目(50921063)

摘　　要：为了研究浅埋双侧偏压小净距隧道围岩压力的大小及分布规律,针对该类型隧道的特点,建立了浅埋双侧偏压小净距围岩压力荷载计算的力学模型,并结合公路隧道设计规范中有关成果,推导出能够考虑隧道左、右洞先后施工过程的隧道围岩压力计算理论。依托忻保高速钻钱门隧道工程对双侧偏压小净距隧道围岩与初期支护间接触压力进行现场监测,获得了该类型隧道围岩压力随时间和后行洞开挖影响的变化规律。由理论计算与现场监测结果对比分析可知,隧道各关键点围岩压力监测值均小于理论值,且其分布规律与理论成果相接近,表明计算模型合理。为该类型隧道设计与衬砌荷载的计算奠定了理论基础。In order to research the tunnel rock pressure and its distribution, the mechanical model of tunnel rock pressure of shallow-buried bilateral bias neighborhood tunnel is set up based on series assumptions. The calculation theory of tunnel rock pressure is deduced, in which the construction processes of twin tunnels can be considered. Furthermore, the contact pressure between tunnel lining and surrounding rock is monitored on site at Zuan Qianmen Tunnel of Xinbao expressway, and the change law of contact pressure corresponding with time and construction processes is obtained. Meanwhile, the comparison analysis has been made between field monitoring value and theoretical value, and the result shows that the tunnel rock pressure＇s mechanical model and calculation theory of shallow-buried bilateral bias neighborhood tunnel is rational, which will provides the theory foundation to tunnel design and tunnel rock pressure calculation of shallow-buried bilateral bias neighborhood tunnel.

关 键 词：监测 围岩压力 力学模型 双侧偏压隧道 小净距隧道 

分 类 号：U456[建筑科学—桥梁与隧道工程]