铁道科学与工程学报2016，Vol.13Issue(11)：2133-2141,9.
宝兰客专泥岩隧道受力特性试验研究
Test study on the mechanical characteristics of mudstone tunnel on Baoji-Lanzhou PDL
摘要
Abstract
Based on the engineering background of Anding mudstone tunnel on Baoji-Lanzhou Passenger Dedi-cated Lines,the physical properties of mudstone and the change over time and the distribution law of the parame-ters such as surrounding rock pressure,stress in steel arch,stress between the first linings and the second lin-ings,steel axis force in the secondary lining,concrete stress,etc were studied through comprehensive on-site monitoring and geotechnical tests.The results show that the swelling property of mudstone ranges from no swelling to weak swelling,but there is a certain disintegration of mudstone with presence of water.The surrounding rock stress grows over time,the surrounding rock pressure of inverted arch is the maximum,which all tends to be sta-ble in the end.The value of stress in steel arch is not stable,even with large fluctuation.The stress in steel arch of side wall foundation is also the maximum,however,it tends to be stable in the end.The stress between first linings and second linings is larger overall with large fluctuation,and the stress of side wall foundation is the maximum,increases over time and finally tends to be stable.The steel axis force in the secondary lining is com-pressive,the value in steel axis force of both inside and outside is approximate.Concrete stress is relatively gen-erally large,where the stress in right arch springing appear to be tensile stress,and the stress in left arch spring-ing are larger than those in the right side.关键词
泥岩隧道/监控量测/围岩压力/钢拱架应力/软化Key words
mudstone tunnel/monitoring measurement/surrounding rock pressure/stress in steel arch/soften分类
交通工程引用本文复制引用
张钦鹏,梁庆国,孟博文,王新东..宝兰客专泥岩隧道受力特性试验研究[J].铁道科学与工程学报,2016,13(11):2133-2141,9.基金项目
国家自然科学基金资助项目（41562013，41262010）；长江学者和创新团队发展计划资助项目（IRT1139）；甘肃省基础研究创新群体资助项目 （）
