不同加固方案在软土路基处治中的应用效果比较

Application Effect Comparison of Different Reinforcement Plan on Soft Ground Treatment

某段一级公路路基为软弱土层,地质条件差,路堤填方高,因此在大面积施工前,选取了代表性路段进行粉喷桩、砂桩和袋装砂井3种处治方案的比较。通过对各方案施工过程中地基孔隙水压力和路基沉降的观测结果分析,表明3种处治方案均具有可行性。结合经济性和地基固结情况分析,推荐采用袋装砂井处理方案。

A representative part of an arterial highway foundation, which is soft soil, is chosen for reinforcement treating by three methods, such as cement-soil mixing pile, sand compaction pile and sand bag well. The monitoring results of the pore pressure and settlement show that although the three methods are all feasible, the sand bag well method is proposed as the treatment plan in view of the project cost and the consolidation degree.