铁道科学与工程学报2016，Vol.13Issue(11)：2204-2210,7.
循环荷载下地铁隧道基底软岩动力变形试验研究
Dynamic deformation of soft rock under cyclic loading in subway tunnel basal
摘要
Abstract
Weathered-conglomerate is a low-strength soft rock formed by intense weathering of a subway tunnel basement.Using dynamic triaxial cyclic loading test,the law of development of dynamic strain for weathered con-glomerate under cyclic loading was studied,while the influence degree of dynamic stress amplitude,static devia-tor stress,confining pressure impact and loading frequency on dynamic strain for weathered conglomerate was an-alyzed.The results showed that,the deformation development of weathering conglomerate could be divided into two categories,i.e.,stable and failure.Under cyclic loading,the significant factors affecting plastic dynamic strain were the dynamic stress and static deviator stress amplitude,whereas confining pressure and load frequency were secondary factors.The rock deformation increased with the axial dynamic stress and static deviator stress, and greater number of load applications is needed for reaching stable state.关键词
循环荷载/隧道/全风化砾岩/动力变形Key words
cyclic loading/tunnel/weathered-conglomerate/dynamic deformation分类
建筑与水利引用本文复制引用
赵丹,曹前,黄娟..循环荷载下地铁隧道基底软岩动力变形试验研究[J].铁道科学与工程学报,2016,13(11):2204-2210,7.基金项目
国家自然科学基金资助项目（51508575，51108461）；长沙市建设科技资助项目 （）
