双控动力固结技术开发与应用

Development and application of double control dynamic consolidation method

双控动力固结法是一种将电渗法和强夯法有机结合起来进行软粘土地基处理方法。文章介绍了双控动力固结法的作用机理、设计方法和施工工艺,并通过工程实例证明了该项技术的适用性。电渗降水能快速降低夯前地下水位和软粘土含水量,显著降低强夯产生的超孔隙水压力以及加快超孔隙水压力的消散,达到提高单点夯最佳夯击能,故而利用双控动力固结法可达到显著的加固效果。

Double control dynamic consolidation method is a ground treatment method, combining electro osmotic dewatering with dynamic consolidation organically. In this paper, we discuss the action mechanism, design method and construction process of the double control dynamic consolidation method, and then its adaptability is proved by an engineering example. Electro osmotic dewatering can decrease greatly underground water level and water content of soft clay soil, so as to depress sharp growth of excess pore water pressure during dynamic compaction, and promote quick dissipation of excess pore water pressure. Therefore, optimum ramming energy can be increased clearly, so that improvement effectiveness is more remarkable.