地震作用下地铁隧道与邻近建筑相互影响研究

以西安地铁某区间隧道侧穿学校公寓为研究对象,利用MIDAS GTS数值模拟软件进行时程分析。重点研究了地震作用下地铁隧道与邻近建(构)筑物间的相互影响。研究结果表明,隧道结构刚度较周围地层大,对周围地层变形存在约束性,使隧道周围地层的整体刚度有所提高,隧道结构的修建不会造成周围地层及邻近建筑所受地震作用增大,而邻近建筑的存在会造成隧道结构所受的地震作用增大。根据研究结果,针对隧道邻近建(构)筑物提出了抗震构造措施,为类似工程提供参考。

On the Mutual Effects of Earthquake Action on Subway Tunnels and the Adjacent Buildings

Taking a section tunnel crossing alongside the university apartment as the case,MIDAS GTS numerical simulation software is used to take a time-history analysis,the mutual effects of subway tunnels and the adjacent buildings under earthquake action are mainly studied.The result of this research shows that tunnel structure is characterized by greater stiffness than that of the surrounding strata,which exerts certain binding force on the stratum deformation.At the same time,the tunnel will strengthen the stiffness of the surrounding strata,but not increase the earthquake action on the surrounding strata and the surrounding buildings.To the contrary,the surrounding buildings will increase the earthquake action on tunnel structure.Based on this study,the seismic structural measures of the buildings adjacent to tunnels are proposed,so as to provide a reference for similar projects.