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根据动力学理论,建立考虑山体、竖井、合福客专的数值模型,研究高铁列车运营下竖井衬砌的位移、应力的响应特性。结果表明:随着列车速度的降低,竖井衬砌竖向位移、水平位移及应力都减小,只是沿着竖井深度方向减小的幅度不一样;同时降低车速,对降低竖井衬砌的附加动竖向位移和附加动竖向应力更有效。在竖井顶部靠近山表的位置,此处为自由表面,水平位移、竖向位移等动力响应较大。列车交会下的竖井衬砌的竖向位移和竖向应力较单线行车下有显著的增大,特别是竖井井口及其以下200m深度的范围。
According to the dynamics theory, a numerical model considering the mountain, shaft and Hefei passenger is established to study the response characteristics of the displacement and stress of shaft lining under the operation of high-speed rail. The results show that as the train speed decreases, the vertical displacement, horizontal displacement and stress of the shaft lining decrease, but the decreasing amplitude along the shaft depth is different. At the same time, the vehicle speed is reduced, Displacement and additional vertical and vertical stress more effective. In the top of the shaft close to the location of the mountain table, here is a free surface, horizontal displacement, vertical displacement and other dynamic response larger. The vertical displacement and vertical stress of the shaft lining under the train rendezvous show a significant increase compared with that under the single-line operation, especially in the range of 200m below the vertical shaft wellhead.