Studies on Aseismatic Performance of a Typical Subway Tunnel with Initial Defects Caused by Construction of New Down-Through Tunnels
For the engineering background of subway tunnel with initial defects caused by the construction of new down-through tunnels, the aseismatic performance of the existed tunnel is studied so as to reveal the mechanism of seismic dynamic response by using finite difference method.Numerical simulation shows that the tunnel is deforming in its entirety since such physical variables as velocity, displacement and stress in its all key weak points have same dynamic tendency under influence of approaching construction of tunnels, and these variables are much larger than those without any influence.After down-through construction, much influences of aseismatic performance are mainly taking place at both the side wall and the upper arch, and the shearing damage are mainly doing in surrounding soil mass.Due to widely shearing damage after down-through construction, it is suggested that grouting reinforcing should be applied so as to make them much stiffness as a whole.
Existed tunnel Initial defects Seismic dynamic analysis Approaching construction
Wei Ze SUN Jun Dong Yu Ping CUI Fei Dong
School of Civil Engineering and Traffic Engineering,Beijing University of Civil Engineering and Arch Road and Bridge Consultants Co.Ltd,CCCC,Beijing,100029,China
国际会议
上海
英文
972-975
2012-10-19（万方平台首次上网日期，不代表论文的发表时间）