高铁对近接矿区深主井的动静载影响

Dynamic and static influence of high- speed rail train on the neighbouring deep vertical shaft

将列车和路基视为超载,分析合肥-福州客专对邻近矿区主竖井衬砌的静力影响;根据动力学理论建立考虑山体、竖井、合福客专的数值模型,分析模型的自振频率和振型特性,研究列车对竖井衬砌的位移、应力的影响;并提出竖井回填方案.结果表明,合福客专对竖井的影响范围可达到井口下方的260 m;列车振动主要在竖井中产生竖向位移沉降,其次为竖向隆起;在竖井顶部靠近山表的位置,列车荷载引起的附加动位移和动应力都较大;主井回填采用自下而上的方式进行.

Static effect of Hefei- Fujian passenger dedicated line on the neighboring deep vertical shaft was analyzed by considering trains and roadbed as overloaded. A simulation model was built to study vibration frequency and mode,including displacement and stress of shaft lining. Backfill program was proposed. Result shows the influence scope of the Hefei- Fujian passenger dedicated line on the shaft ranges up to 260m; train vibration leads to vertical settlement and uplift in the shaft lining; the additional dynamic displacement and dynamic stress are larger at the top of the shaft for the freedom surface; the shaft is backfilled by a bottom- up approach.