The quality control analysis of vacuum preloading in soft soil foundation treatment

Vacuum preloading is an effective method of soft soil foundation treatment.The quality control of vacuum preloading plays a decisive role on the quality and duration of foundation treatment.Through many years practice experience for soft soil foundation treatment,the main problems existed in soft soil foundation treatment are put forward,for instance:sand cushion obstruction caused by plastic-flow silt,mis-measurement of underground water level,and the boundary foundation strength influenced by lateral displacement,etc..To solve these problems,specific methods are proposed for each problem respectively,such as the improvement of sand cushion construction technology,new measurement of underground water level,and protection measures of pile and excavation on the base of analyzing the damage of lateral displacement.These methods have achieved good effect in engineering practice and can provide reference for similar engineering constructions.