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对地下水位以下较深的饱和粉土地基处理,经过方案比选,采用明沟降水,并进行部分换填加基坑内强夯的处理方法。地基处理试验进行了单点夯及群夯试验,研究表明:大能量的点夯会引起粉砂地基的高度液化,是不利于地基处理的,合理的夯击能可以得到较好的处理效果。通过施工后的载荷试验、标贯试验、干密度试验等检测,以试验所确定强夯的参数处理后的地基土体满足设计要求,处理取得良好的效果。
The groundwater level below the deeper saturated silt foundation treatment, through the program comparison, the use of open ditch rainfall, and part of the replacement pit plus dynamic consolidation of the pit approach. The results of single point ram and group ram test show that the high energy rammer will cause high liquefaction of silt foundation, which is unfavorable to foundation treatment. Reasonable ramming energy can get better treatment effect. After the construction of the load test, standard test, dry density test and other tests to determine the dynamic compaction parameters of the test after the foundation soil to meet the design requirements, the treatment achieved good results.