不同防排水方式下富水隧道受列车振动荷载动力影响分析
Analysis of dynamic influence of train vibration load on water rich tunnel under different water proof and drainage ways

为研究富水隧道在列车循环动载下承受的动水压问题，针对石马寨隧道在国内首次应用的仰拱下设排水沟防排水方式，对比传统的仰拱填充内设排水沟方式，基于结构动力学理论，建立动力—流体耦合模型，分析在列车动载作用下结构的动力学响应和地层渗流场变化，评价列车运营时2种防排水方式的防排水效果及适应性。研究结果表明：仰拱下设防排水方式能保证仰拱底部较小水压力，且有效削弱列车动载对地下水压力的影响。研究结果可为富水隧道防排水提供参考。
For the study of the dynamic water pressure on the water rich tunnel under the cyclic dynamic load of the train, based on the first water proof and drainage application that set drainage ditch under the inverted arch in Shimazhai Tunnel, compared with the traditional drainage ditch in invert arch filling, based on the theory of structural dynamics, the dynamic fluid coupling model, analysis of dynamic loads and the dynamic response of structure and seepage field changes under dynamic train loads, and evaluation on the water proof and drainage effect and adaptability of two ways when train operates were conducted. The result shows that the water proof and drainage way under inverted arch can guarantee the low water pressure under inverted arch, and effectively weaken the effect on groundwater pressure under dynamic train load. And the results can be reference for water rich tunnel