振动液化排水法在大面积吹填粉土地基处理中的应用

Application of Vibrating Liquefaction Drainage Method in the Treatment of Large Area Hydraulic Fill Silt Foundation

根据饱和粉土在动荷载作用下易液化的特性,通过试验方法探索出吹填疏浚粉土地基的处理方法,即振动液化排水法。先采用水上挖掘机和陆上挖掘机对吹填疏浚粉土地基进行振动液化排水处理,振动液化后的粉土颗粒在自重作用下产生沉降且重新排列,再根据吹填疏浚粉土地基的厚度情况选用其他方法进一步进行地基处理,处理后的地基承载力特征值与回弹模量均满足要求。

Saturated silty soil can easily become liquified when subjected to dynamic load effects. According to this characteristics, this paper explored a new method for the treatment of saturated silty soil foundation by test, i.e. vibrating liquefaction drainage method. In this method, the hydraulic fill dredging silt foundation is firstly treated by vibrating liquefaction drainage treatment method using above- water and onshore excavators. Silt particles settle and realign under dead weight effect after vibrating liquefaction. Further foundation treatment is implemented with appropriate methods depending on the depth of hydraulic fill dredging silt foundation. Test results show that both the characteristic value of subgrade bearing capacity and the resilient modulus can meet the design requirement.