基于抛物线型Mohr强度准则的隧洞弹塑性分析  

Elastoplastic analysis of tunnels based on parabolic Mohr strength criterion

作　　者：罗小艳[1] 刘伟平[2] 

机构地区：[1]江西科技师范学院建筑工程学院,江西南昌330013 [2]南昌大学建筑工程学院,江西南昌330031

出　　处：《水利水电科技进展》2011年第3期34-35,94,共3页Advances in Science and Technology of Water Resources

基　　金：江西省教育厅科技计划(s00164)

摘　　要：基于具有抛物线型Mohr强度准则,分析渗流作用下隧洞的弹塑性力学行为。通过考虑和不考虑渗流场影响的实例对比分析,结果表明:考虑渗流场时所得塑性区半径比不考虑时大,而且随着孔隙水压力的增大,渗流场的影响越来越显著;隧洞径向应力和切向应力都与渗流场密切相关。所得结果可为强度包络线近似于二次抛物线的围岩隧洞设计提供理论依据。Based on the Mohr strength criterion with parabolic failure envelope,an elastoplastic analysis of tunnels under seepages was given.Comparative analysis of an example with and without consideration of seepages indicates that the radius of the plastic zone considering influence of seepage fields is larger than that without considering it.With the increase of the pore water pressure,the influence of seepage fields is more and more significant.The seepage fields have close relation with the radial and tangential stresses of the tunnels.It may provide theoretical supports for the design of tunnels whose strength envelopes similarly take the form of quadratic parabolas.

关 键 词：隧洞 抛物线型Mohr强度准则 渗流场 弹塑性分析 

分 类 号：TV223.4[水利工程—水工结构工程]