考虑孔隙水作用的盾构倾斜隧道开挖面可靠性分析  

Reliability Analysis of Inclined Shield Tunnel Face Considering Pore Water Pressure

作　　者：张晗秋 周标 周飞 刘云龙 曾林海 朱远嫘 王森 ZHANG Hanqiu;ZHOU Biao;ZHOU Fei;LIU Yunlong;ZENG Linhai;ZHU Yuanlei;WANG Sen(Nanchang Rail Transit Group Co.,Ltd.,Nanchang 330200,China;The First Engineering Co.,Ltd.,China Railway No.5 Engineering Group,Changsha 410117,China;School of Resources,Environment and Safety Engineering,Hunan University of Science and Technology,Xiangtan 411201,China)

机构地区：[1]南昌轨道交通集团有限公司,江西南昌330200 [2]中铁五局集团第一工程有限责任公司,湖南长沙410117 [3]湖南科技大学资源环境与安全工程学院,湖南湘潭411201

出　　处：《矿业工程研究》2024年第3期20-28,共9页Mineral Engineering Research

摘　　要：为研究倾斜隧道开挖面在孔隙水作用下的稳定性,将孔隙水作为外力引入倾斜隧道开挖面计算模型中,运用极限分析法求解孔隙水作用下倾斜隧道开挖面支护力的解析解,并通过序列二次规划(Sequence Quadratic Programing,SQP)算法求解得到支护力上限解.根据可靠度理论,构建倾斜隧道开挖面极限状态方程,分析隧道倾角、孔隙水压力系数、水位线高度和Hoek-Brown参数对隧道开挖面失效概率的影响以及不同安全等级下支护力的合理范围.结果表明:孔隙水及隧道倾角对隧道的稳定性有显著的影响,隧道开挖面失效概率随孔隙水压力系数的增加而增加.研究结果可为孔隙水作用下倾斜隧道支护提供理论支撑.To study the stability of inclined tunnel face under the action of pore water,the pore water is introduced to the calculation model of inclined tunnel excavation face as an external force,and the analytical solution of the support force under the action of pore water is solved by using limit analysis method,and the upper limit solution of the support force is obtained by solving the Sequence Quadratic Program(SQP)algorithm.According to the reliability theory,the limit state equation of inclined tunnel excavation face is established,and the influence of tunnel inclination Angle,pore water pressure coefficient,water level height and Hoek-Brown parameters on the failure probability of tunnel excavation face,and the reasonable range of support force under different safety grades are analyzed.Pore water and tunnel inclination angle have significant effects on tunnel stability.The failure probability of tunnel excavation face increases with the increase of pore water coefficient.It has provided theoretical support for inclined tunnel support under the action of pore water.

关 键 词：孔压效应 倾斜隧道 极限分析法 失效概率 

分 类 号：TU43[建筑科学—岩土工程]