【摘要】 随着我国铁路网建设的高速发展,穿越季节性冻土区的铁路数量及行车速度都在不断提高,由于高铁路基沉降所引发的危害也愈加严重。在考虑季节性冻土结构性、冻融循环的基础上建立了高速列车荷载长期作用下沉降量预测模型,给出了具体计算步骤;通过将模拟划分为若干个过程,实现了土体力学特征值的动态控制,避开了振波对土体应变影响的复杂性,使预测结果更加精确。更多还原

【Abstract】 With the speedy construction of railway network in our country,the number of trains that run through the seasonal frozen earth area and their driving speeds are increasing accordingly;meanwhile the harms triggered by roadbed subsidence are growing even more serious.A predictive model of the roadbed subsidence under long-term load action of the high-speed trains is established considering the constitutive property of seasonal frozen earth and the freezing and thawing circle;concrete computation steps are presented;by dividing the simulation into several processes,dynamic control of the soil’s mechanical characteristic values is obtained and the complex influence of vibrational wave on soil strain is avoided,which will leave the predictive result to be more precise.更多还原