山岭隧道高水压下衬砌结构平面数值分析  

Plane numerical analysis of mechanical behaviors of lining structure under high hydraulic pressure in mountain tunnel

作　　者：高新强[1] 仇文革[1] 高扬[2] 

机构地区：[1]西南交通大学土木工程学院,四川成都610031 [2]铁道第二勘测设计院桥隧处,四川成都610031

出　　处：《岩土力学》2005年第3期365-369,共5页Rock and Soil Mechanics

基　　金：铁道部科技发展计划项目(NO.2001G009-2);西南交通大学博士研究生创新基金项目。

摘　　要：采用平面有限元数值模型分析高水压作用下衬砌结构受力特征和围岩稳定性,研究了水压力大小、注浆加固圈厚度、水压力折减系数对衬砌结构受力和围岩塑性区的影响。研究结果表明:衬砌内力与塑性区随着外水压力折减系数的增大明显增大,随着总水压力的增加而增大,随着加固圈厚度的增大而减小;外水压力折减系数是影响衬砌内力和围岩塑性区的重要因素。Mechanical behaviors of lining structure and stability of surrounding rock under high hydraulic pressure are analyzed with plane finite element numerical model. The values of hydraulic pressure, thickness of inject grouting area and the influences of reduction coefficient of external hydraulic pressure on mechanical behavior of lining structure and plastic zone of surrounding rock, are studied. The results show that the lining internal force and plastic zone increase remarkably with the increase of reduction coefficient of external hydraulic pressure; and increase with the increase of total hydraulic pressure; and decrease with the increase of thickness of inject grouting area. The reduction coefficient of external hydraulic pressure is an important factor, which influence on internal force of lining and plastic zone of surrounding rock.

关 键 词：山岭隧道 高水压 衬砌结构 数值分析 

分 类 号：U451[建筑科学—桥梁与隧道工程]