【摘要】 为了解在遭遇地震的情况下,穿黄隧洞的抗震安全性能,选取穿黄隧洞地基饱和砂土为样本,进行了室内饱和固结不排水动三轴试验,研究循环动荷载作用下饱和砂土的动强度特性和孔隙水压力特性,给出了循环动荷载的大小对动强度特性和孔隙水压力特性的影响规律。结果表明:静应力状态、动应力幅及其循环次数和试样密实程度等是影响穿黄工程隧洞段地基饱和砂土动强度特性和孔隙水压力特性的主要因素。更多还原

【Abstract】 In order to investigate the anti-seismic safety performance of the tunnel crossing Yellow River when an earthquake occurs,we adopt the saturated sandy soil of the foundation as samples,and performed laboratory CIU-test to study the characteristics of dynamic strength and pore water pressure of the saturated sandy soil under cyclic dynamic load.The influential laws of cyclic dynamic load on characteristics of dynamic strength and pore water pressure are obtained.The results show that the static stress state,dynamic stress amplitude and its cyclic times and compactness of the samples are the main influential factors of dynamic strength and pore water pressure of saturated sandy soil of tunnel crossing Yellow River.更多还原