考虑黏聚力及地震力的浅埋偏压隧道围岩压力  

Rock pressure of shallow unsymmetrical-loading tunnels considering the cohesion and earthquake action

作　　者：张治国[1,2,3] 姜蕴娟[1] 刘明[2] 宫剑飞[4] ZHANG Zhiguo;JIANG Yunjuan;LIU Ming;GONG Jianfei(School of Environment and Architecture,University of Shanghai for Science and Technology,Shanghai 200093,China;State Key Laboratory for Geomechanics and Deep Underground Engineering,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China;Engineering Research Center of Rock Soil Drilling and Excavation and Protection,Ministry of Education,Wuhan,Hubei430074,China;China Academy of Building Research,Beijing 100013,China)

机构地区：[1]上海理工大学环境与建筑学院,上海200093 [2]中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏徐州221116 [3]岩土钻掘与防护教育部工程研究中心,湖北武汉430074 [4]中国建筑科学研究院,北京100013

出　　处：《中国矿业大学学报》2018年第4期780-790,共11页Journal of China University of Mining & Technology

基　　金：国家自然科学基金项目(41772331);中国矿业大学深部岩土力学与地下工程国家重点实验室基金项目(SKLGDUEK1707);岩土钻掘与防护教育部工程研究中心项目(201705)

摘　　要：通过地震力偏角的旋转,在考虑水平、竖向地震综合作用下,采用拟静力法提出了黏聚力和内摩擦角分算的浅埋偏压隧道围岩压力解,通过与规范及既有文献比较,验证了计算结果的合理性,并探讨了浅埋偏压隧道围岩压力的影响因素.结果表明:竖向地震力较小时,随水平地震效应增加,围岩压力、浅埋侧下滑力及深埋侧压力呈上升趋势,深埋侧下滑力及浅埋侧压力呈下降趋势;随竖向地震力增加,围岩压力先下降后上升;内摩擦角提高及黏聚力降低,均会引起围岩压力明显提高,同时双侧下滑力及压力有所降低.另外当地震力较小时,围岩级别越高,围岩压力、双侧下滑力和正压力值越小;随地震力增加,所得结果有不同程度的突变.By rotating the deflection angles of earthquake force,an analytical solution of rock pressure for shallow unsymmetrical-loading tunnels under horizontal and vertical earthquake action was derived using the quasi-static method,and the layering calculation for the internal friction angle and the cohesive force was considered.The verification on the rationality of the solution was conducted through comparisons with the normative method and existing literatures.Discussions on the factors were also carried out.It is found that when the vertical earthquake is tiny,the rock pressure,sliding force on the shallow side and pressure on the deep side have an upward trend with the increasing of horizontal earthquake,while the others are on the contrary.As the vertical earthquake force gradually increases,the rock pressure appears up-ward after the decline.The increasing of internal friction angle and decreasing of the cohesion both have positive effect on the rock pressure but negative effect on the others.Additionally,when the earthquake force is small,the higher the level of surrounding rock,the lower the rock pressure,the sliding force and positive pressure on both sides.With the increase of earthquake force,the results will develop mutations in varying degrees.

关 键 词：浅埋偏压隧道 水平地震力 竖向地震力 黏聚力 围岩压力 

分 类 号：U25[交通运输工程—道路与铁道工程] TU91[建筑科学—建筑理论]