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对盾构隧道联络通道的设置对主隧道结构的抗震性能的影响(包括应力和位移)进行了分析和研究。将整个场地加速度大小规定为随时间呈余弦曲线变化作用在沿联络通道轴线的方向,以简化实际地震中复杂的加速度-时间曲线,同时隧道结构被简化为连续介质。研究表明,联络通道的存在对主隧道在场地加速度作用下的应力和位移有较大影响,影响范围大致是联络通道两侧各2.5倍联络通道直径的距离。
The influence of the setting of shield tunnel connecting channel on the seismic performance of the main tunnel structure (including stress and displacement) is analyzed and studied. The overall site acceleration is defined as a cosine curve change over time acting along the axis of the connecting channel to simplify the complex acceleration-time curve in actual earthquakes while the tunnel structure is simplified as a continuous medium. The research shows that the existence of communication channel has a great influence on the stress and displacement of the main tunnel under the acceleration of the site, and the influence range is roughly the distance of 2.5 times of the diameter of each communication channel on both sides of the communication channel.