浅埋偏压隧道掘进围岩压力解析  

Calculation of Surrounding Rock Pressure in Shallow and Biased Tunnel

作　　者：赵海涛 胡宇[2] 刘丙宇 张彦龙 张小军[2] 高文学[2] ZHAO Haitao;HU Yu;LIU Bingyu;ZHANG Yanlong;ZHANG Xiaojun;GAO Wenxue(BCEG Road and Bridge Construction Group Co.,Ltd.,Beijing 100123,China;Faculty of Architecture,Civil and Transportation Engineering,Beijing University of Technology,Beijing 100124,China)

机构地区：[1]北京建工路桥集团有限公司,北京100123 [2]北京工业大学城市建设学部,北京100124

出　　处：《施工技术（中英文）》2023年第12期37-42,62,共7页Construction Technology

基　　金：爆破工程湖北省重点实验室开放基金(BL2021-23)。

摘　　要：为分析浅埋双侧偏压隧道施工过程中围岩压力分布规律,基于极限平衡理论,分析并推导了分离式隧道掘进时对两洞间围岩压力、衬砌结构互不影响的净距临界值;结合公路隧道设计规范,通过引入围岩压力折减系数,对不同净距、不同施工阶段下的双侧偏压小净距隧道围岩压力进行解析,建立了浅埋双侧偏压隧道掘进围岩压力计算力学模型。依托国道109新线高速公路清水2号隧道工程,基于现场监控量测,获取该隧道先行洞不同施工阶段围岩压力变化规律,并将理论解析值与监测数据进行对比分析,误差较小,验证了该计算模型的正确性。In order to analyze the distribution law of surrounding rock pressure during the construction of shallow and double-sided biased tunnel,based on the theory of limit equilibrium,the critical value of clear distance which has no influence on the surrounding rock pressure and lining structure between two tunnels is analyzed and deduced.Combined with the design specification of highway tunnel,the surrounding rock pressure of double-sided biased tunnel with different clear distances and different construction stages was analyzed by introducing the reduction coefficient of surrounding rock pressure,and the mechanical model of surrounding rock pressure calculation in shallow and double-sided biased tunnel was established.Based on Qingshui No.2 tunnel project of the new line of National Highway 109,the surrounding rock pressure variation law of the tunnel in different construction stages was obtained based on the field monitoring and measurement,and the theoretical analytical value was compared with the monitoring data,which proved the correctness of the calculation model.

关 键 词：隧道工程 浅埋偏压 围岩压力 极限平衡理论 监测 

分 类 号：U451.2[建筑科学—桥梁与隧道工程]