路基溶洞加固的离散元方法数值模拟研究

摘要

The discrete element model of subgrade with karst cave is established and the response of the model under load effect is simulated in this paper.The contact force distribution and displacement vector between grains of subgrade model before and after reinforcement are separately provided.Displacement of grain in 6 vertical positions of karst carve is monitored.The result shows that grain displacement significantly reduced from 0.040em to 0.014cm after reinforcement, which is also the largest reduction.%通过建立含溶洞路基的离散元模型数值模拟了荷裁作用下模型的响应,给出了采取加固措施前后组成路基模型颗粒间的接触力分布及位移矢量,监测了溶洞竖向六个位置颗粒的位移变化.结果表明,加固后颗粒的位移明显减小,由0.040 cm减至0.014 cm为最大减小范围.