Design And Application Study On Strengthening Soft Soil Subgrade By Vacuum-surcharge Preloading Method

Along with the rapid developments of expressway construction in China, thestudy on reasonable and reliable method of soft ground treatment has become a veryurgent research subject in the geographical distribution of soft soil highwayconstruction. Vacuum-surcharge preloading method, as a new effective soft soilfoundation treatment method, which has a short time, low cost, smallpost-construction settlement of advantages, has wide application prospects in softsoil subgrade treatment. But the mechanism research is still behind the engineeringpractice, there are a lot of theoretical problem has not been solved. Therefore, thisarticle about vacuum-surcharge preloading method studies on the reinforcementmechanism, settlements, environmental effect and so on.Based on the former researchers’ achievement, combined soft soil foundationengineering example by vacuum-surcharge preloading method in Sifang districtQingdao, through the theoretical analysis, field monitoring and indoor experimentcontrast, research the deformation law of soil reinforcement, depth and caused by theenvironmental effect, evaluation reinforcement effect.The results show that the vacuum-surcharging preloading method can speed upthe rate of foundation settlement, shorten the construction period. Thevacuum-surcharging preloading method reduces horizontal displacement andimproves the stability of the foundation. As a new type of foundation treatmentmethod, vacuum-surcharge preloading method, which is a kind of economic,environmental and effective in soft ground treatment, is worth promoting method inJiaozhou Bay.