克拉2气田盐水沟隧道地震响应特性分析

Analysis on Characteristics of Seismic Response at Yanshuigou Tunnel in Kela-2 Gas Field

通过对克拉2气田盐水沟山岭隧道震害调查分析,发现了洞口段和洞身段的裂缝较为密集。因此,借助连续介质离散元软件CDEM,研究了在高烈度地震区地震情况下隧道的整体地震响应特性和隧道进出口段、围岩改变及山岭隧道埋深变化的洞身段的地震响应特性,并在此基础上分析了隧道产生大量裂缝的震害机理。

With the investigation and analysis on the seismic damage to the mountain tunnel at Yanshuigou in Kela-2 Gas Field, it was found that the cracks was intensive in the sections of the tunnel portal and trunk. Therefore, by use of CDEM, a continuum-based discrete element software, this paper studied the overall seismic response characteristics of the tunnel on the condition of earthquake in high-intensity earthquake region, and the seismic response characteristics of both the tunnel entrance/ exit and the tunnel trunk where the surrounding rock and the buried depth thereof have variations ; and on this basis, the mechanism of seismic damage caused by a large number of crack arising at the tunnel, was analyzed.