软土地基上路堤拓宽工程的稳定性分析及处理对策

Stability Analysis of Embankment Widening Project on Soft Ground and Improvement Measures

结合某湖滨路的拓宽改造工程,采用数值分析软件分析了软土地基上进行新路堤填筑对沉降的影响,并采用强度折减法研究其整体稳定性.数值分析结果反映出加宽后路堤的整体稳定的安全储备不足,新老路堤的差异沉降明显,需要采取加固处理措施.对两种不同的加固措施进行了研究,计算结果表明,采用水泥搅拌桩等进行软基处理能有效地提高路堤的整体稳定性.本文的实例研究对于类似工程可以起到参考和借鉴的作用.

The settlement caused by embankment widening on the soft soil condition of road widening project is analyzed by using numerical simulation;and the strength reduction method is used to study the global stability.The numerical analysis indicates that after road widening the stability of embankment is not enough;and the differential settlement of embankment is obvious;thus reinforcement measures are used to increase its safety.Through studying two improvement measures,i.e.geogrid and cement mixing piles,some useful conclusion is obtained.The cement mixing piles can reduce the differential settlement and improve the stability of road embankment significantly.The case study can provide reference and illustration for similar projects.