砌石铁路隧道典型病害下安全性研究  

Safety research of masonry railway tunnel under typical disease

作　　者：王薇[1] 邓俊[1] 姚勇[2] 尹俊涛[1] 

机构地区：[1]中南大学土木工程学院,湖南长沙410075 [2]成都铁路局,四川成都610081

出　　处：《铁道科学与工程学报》2016年第1期131-137,共7页Journal of Railway Science and Engineering

基　　金：湖南省科技计划资助项目(2010GK3173);成都铁路局重点资助项目(X1314)

摘　　要：基于川黔线砌石隧道的现场检测结果,针对砌石衬砌隧道空洞和砂浆脱落2种典型病害,利用ANSYS有限元分析软件,分别建立对应不同病害的有限元模型,展开对不同宽度、深度空洞以及不同深度砂浆脱落下衬砌结构安全性分析。通过对典型危险截面的结构安全系数验算以及灰缝截面的抗拉抗剪验算,找出不同规模病害下衬砌结构安全性的变化规律。研究发现宽度尺寸为2.0 m的空洞对衬砌结构影响较1.5 m空洞大得多,同时为保障砌石隧道结构安全,建议将砂浆脱落深度控制在5 cm以内。Based on detection result of the masonry tunnels of Chuanqian line, two typical diseases, the tunnel lining cavity and masonry mortar fell, are identified. Finite element models corresponding to different diseases have been established in ANSYS to analyze the safety of lining under different cavity widths, depths and degrees of mortar fell. With the calculation for dangerous section and analyzing tensile shear of mortar joint section, the variation for tunnel lining safety of different diseases have been figured out. Finally, it is found that the influence of cavity dimension of 2 m is much higher than that of 1.5 m. in order to make sure a safety status of stone tunnel structures, it is suggested that the depth of mortar fell should be controlled within 5 cm.

关 键 词：砌石隧道 空洞 砂浆脱落 安全性研究 

分 类 号：U457[建筑科学—桥梁与隧道工程]