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针对杭州地铁近江段钱塘江冲海积粉土地基,使用Plaxis软件对地铁列车振动荷载作用下隧道结构的动力响应进行数值模拟,分析单洞列车轨道荷载及双洞列车轨道荷载作用下,隧道结构的加速度和速度动力响应规律.研究表明:列车动力荷载作用下在相同埋深下频率越大加速度越大,总速度大频率大于小频率;X方向分速度双洞大于单洞;Y方向的分速度单洞与双洞接近;在频率1 Hz情况下地表沉降量最大,双洞大于单洞的沉降量.数值模拟结果为地铁设计、施工及安全运营提供参考.
Aimed at the Qiantangjiang silty sea silt subsoil of the Hangzhou section of the Hangzhou Metro, Plaxis software was used to simulate the dynamic response of the tunnel structure under the subway train vibration load. The influence of the single-track train load and the double-track train track load on the tunnel structure The results show that under the same depth under the same dynamic load, the greater the frequency, the greater the acceleration, the greater the total frequency and the smaller the frequency. The double-hole velocity in the X direction is larger than that in the single hole. In the Y direction The single-hole speed is close to the double-hole, the settlement of the ground surface is the largest at 1 Hz and the double-hole is larger than that of the single-hole.The numerical simulation results provide reference for the design, construction and safe operation of the subway.