路基强夯处理孔隙水压力监测及参数确定

Monitoring of Pore Water Pressure and Determination of Parameter for Roadbed Dynamic Compaction

强夯法所具有的优点,使其在许多地基处理工程中都有广泛的应用。然而对于高饱和度的粉粘土地基,需谨慎而行。但如果采用一定的工艺后,强夯法对饱和粉粘土地基也可达到较好的处理效果。文中以某工程的饱和粉土路基处理为例,开展强夯试验研究:分别进行了1、2遍单点夯及全过程孔隙水压力监测。通过监测结果分析:确定第1、2遍强夯的施工参数;第1与第2遍的间歇周期及第2遍两次夯的间歇周期。根据检测以此确定的施工参数在该工程取得了良好的处理效果。

Dynamic compaction is widely used method for subgrade treatment. Dynamic compaction would not be effective for saturated soft foundation, unless some technological process is adopted. This article presents example of dynamic compaction test in a road project. The pore water pressure during the first run, the second run and the all process of the compaction is monitored. Based on the analysis of the monitoring, the working parameter and intermission cycle of the first and the second run dynamic compaction is defined. Constructed with the parameters determined by test, the project has gained a very good result.