【摘要】 利用FLAC3D软件建立了铁路煤矸石路堤数值分析模型,在强度折减法的基础上,按M-C强度理论分析煤矸石填料不同饱水时间正常地基和含软弱土层地基对路堤稳定性的影响。模拟结果表明:对正常和含有淤泥质黏土层的软弱地基,随着路堤填料煤矸石饱水时间的增加,路堤安全系数逐渐降低,说明稳定性逐渐变差。在相同的饱水时间,在边坡坡度、路堤高度、荷载相同的条件下,软弱地基的安全系数比正常地基的有所下降。该研究可为沉陷区煤矸石路堤加固治理提供参考。更多还原

【Abstract】 The numerical analysis model of coal gangue embankment was built using FLAC3 D software. Based on the strength reduction method,the effect of soaking time on stability of embankment constructed on homogeneous foundation and the foundation with soft soil layer was analyzed according to M-C strength theory. The numerical simulation results show that for the homogeneous foundation and the foundation with soft soil layer,the safety factor gradually decreases with the increase of the soaking time,indicating that stability of embankment decreases with the increase of soaking time. At the same soaking time,the safety factor of the embankment constructed on foundation with soft soil layer is lower than that of the homogeneous foundation under the same slope,height and load. The research in this paper can provide references for reinforcement and treatment of coal gangue embankment in subsidence area.更多还原