冻土场下综合管廊的地震响应初探

Preliminary Study on Seismic Response of Utility Tunnel under Frozen Soil

随着经济技术的高速发展,综合管廊这一新兴地下结构越来越多地出现在城市基础建设中。以包头地区综合管廊的实际工程为依托,利用FLAC3D有限差分软件,对冻土场下综合管廊的地震响应进行了初步研究。模拟结果表明,在冻土场下综合管廊的中隔墙及板墙节点处应力最大,冻土层会一定程度地抑制土体及管廊顶板的横向变形位移,初步揭示了冻土场下综合管廊的动力特性,为后续抗震设计提供依据。

With the rapid development of economy and technology,the new underground structure of utility tunnel is continuously applied in urban infrastructure construction.Based on the practical engineering of the utility tunnel in Baotou area,IN this paper a preliminary study on the seismic response of the utility tunnel under frozen soil is carried out by using FLAC3 Dfinite difference software.The results show that the stress of the middle partition wall and plate wall joints of the utility tunnel is the largest in frozen soil,and the frozen soil will restrain the lateral deformation and displacement of the roof of the utility tunnel to some extent.The dynamic characteristics of the utility tunnel under frozen soil are preliminarily revealed,which brings experience to the subsequent seismic design.