摘要
为了探究浅埋偏压隧道软硬交互水平层状围岩压力的分布情况。依托四川省某高速公路建设项目,结合公路隧道设计规范引入软硬互层围岩参数简化方法,改进现有的均质围岩压力计算理论,得到了基于极限平衡法的水平软硬互层隧道围岩压力解析解。并将计算结果与数值模拟结果、规范法计算结果进行对比验证了其正确性。分析了硬岩与软岩层厚比p对隧道围岩压力分布的影响规律,对水平软硬交互围岩浅埋偏压隧道的支护提出了建议。
In order to explore the distribution of soft and hard interactive horizontal layered surrounding rock pressure in shallow buried unsymmetrical pressure tunnels.Based on a highway construction project in Sichuan Province and combined with the design specifications of highway tunnels,a method for simplifying the parameters of soft and hard interbedded surrounding rock was introduced,and the existing method based on the calculation theory of homogeneous surrounding rock pressure was improved,The analytical solution of the surrounding rock pressure of the horizontal soft and hard interbedded tunnel based on the limit equilibrium method was obtained.The calculation result was compared with the numerical simulation result and the calculation result of the standard method to verify its correctness.The influence of the thickness ratio p of hard and soft rock on the pressure distribution of the tunnel surrounding rock was analyzed,and suggestions were made for the support of shallow asymmetric tunnels with horizontal soft and hard surrounding rock.
作者
刘杰
王俊杰
郭建军
LIU Jie;WANG Jun-jie;GUO Jian-jun(State Key Lab of Mountain Bridge and Tunnel Engineering, Chongqing Jiaotong University, Chongqing 400074, China;Diagnostic Technology on Health of Hydraulic Structures Engineering Research Center of Chongqing Education Commission of China, Chongqing Jiaotong University, Chongqing 400074, China)
出处
《科学技术与工程》
北大核心
2022年第4期1649-1655,共7页
Science Technology and Engineering
基金
重庆市研究生导师团队建设项目(JDDSTD2018008)
重庆市技术创新与应用发展专项重点项目(cstc2019jscx-gksbX0072)。
关键词
软硬互层
围岩压力
浅埋偏压隧道
理论计算
soft and hard interbedded
surrounding rock pressure
shallow buried tunnel with unsymmetrical pressure
theoretical calculation
