山体隧道洞口段应力特征研究  

Stress Characteristics Analysis of a Mountain Tunnel Portal

作　　者：魏元杰 魏亚楠[2] 汤秀峰 屈欣[1] 

机构地区：[1]河南理工大学土木工程学院,河南焦作454000 [2]辽宁工业大学土木工程学院,辽宁锦州121000

出　　处：《洛阳理工学院学报（自然科学版）》2014年第4期17-21,26,共6页Journal of Luoyang Institute of Science and Technology：Natural Science Edition

基　　金：河南省教育厅自然科学研究计划项目(2009B130003);河南省高等学校深部矿井建设重点学科开放实验室开放基金(2012KF-04);河南理工大学博士基金(B2009-13)

摘　　要：隧道开挖必然导致洞口段原岩应力重新分布,针对洞口段围岩应力复杂变化及隧道支护受力情况,采用ANSYS有限元三维模拟,并结合现场试验,对浙江某山体隧道进行整体分析。直观地展示了围岩仰坡段受隧道开挖及山体地形地貌影响下应力变化特征,并表明坡趾是阻止失稳破坏的关键位置,衬砌内力与其自身刚度成正比关系等。对该隧道洞口段应力变化情况进行分析,以期对其他类似工程的研究提供借鉴意义。Tunnel excavation will inevitably lead to original rock stress redistribution.Based on the complex surrounding rock stress changes of tunnel portal and tunnel support stress,an overall analysis has been carried out of a mountain tunnel in Zhejiang through ANSYS finite element 3D simulation and field test.In visualizing the slope stress changes of surrounding rock under the effect of tunnel excavation and mountain terrain,it shows that the bottom slop is a key position to prevent loss of buckling failure and internal force of tunnel lining is proportional to its stiffness,etc..Through the analysis of the stress changes in this tunnel portal,it expects to offer some reference to similar project studies.

关 键 词：围岩 应力 ANSYS有限元 现场试验 

分 类 号：U451.2[建筑科学—桥梁与隧道工程]