考虑水-力耦合时交通隧道非线性解析  

NONLINEAR ANALYTICAL SOLUTION OF TRAFFIC TUNNELS CONSIDERING THE HYDRAULIC-MECHANICAL COUPLING

作　　者：邹金锋[1,2] 

机构地区：[1]中南大学土木工程学院,长沙410075 [2]湖南省交通规划勘察设计院,长沙410008

出　　处：《工程力学》2011年第12期105-111,共7页Engineering Mechanics

基　　金：高等学校博士点新教师基金项目(20090162120039);博士后科学基金项目(20090461021)

摘　　要：将具有衬砌的圆形隧道各影响因素简化为轴对称问题。考虑水-力耦合、外水压力作用及Hoek-Brown强度准则,求得交通隧道弹塑性非线性解析解。利用数值方法研究各参数对考虑水-力耦合非线性解的影响,分析结果表明:考虑水-力耦合时,应力场、位移场和塑性区半径均较不考虑耦合因素时大,因此隧道开挖时应充分考虑水-力耦合作用。实例分析表明:随着mi的增大,应力和塑性区半径均随之增加,塑性区半径与参数mi为非线性递增关系。An analytical solution for the analysis of tunnels below a groundwater table in plane strain ax-symmetric conditions is presented.The seepage body force and secondary permeability of the rock mass due to the hydraulic-mechanical coupling,and external water pressure are taken into account.The Hoek-Brown empirical strength criterion for the rock mass is used in the analysis.The nonlinear solutions considering hydraulic-mechanical coupling are given in a pressurized flow tunnel.The results show that the stress field,displacement field and the plastic zone radius are larger than those of not accounting for coupling factors when the hydraulic coupling is taken into consideration.Thusly the tunnel excavation should take full account of the water-force coupling.The case analysis shows that the stress and plastic zone radius grows with the increases of mi,the relation between plastic zone radius and parameter mi is non-linear incremental.

关 键 词：水-力耦合 外水压力 HOEK-BROWN强度准则 隧道 渗流 

分 类 号：TV554[水利工程—水利水电工程]