Experimental Research On Vacuum Pressure Grouting Method To Reinforce Soft Foundation

As Chinese vigorous developed economic and dwindling land resource, we are badly in need of solving scarce land resource problem esp. for coastal areas. The reclamation project is one of the most important solutions for this because it can ease contradiction between people and land, also can optimize ecologic environment by fully utilizing ocean space resource. While reclamation project caused soft oil foundation has to be reinforced in order to put into construction projects. Currently, two main reinforcing methods are vacuum preloading and grouting. But foundation reinforced by either method can hardly meet high-rise buildings’ demands on subsidence and bearing capacity of foundation. This article is to research how to reasonably combine two reinforcing methods to improve bearing capacity of soft oil foundation.By modeling experiments on the mechanism of action of combining vacuum preloading and grouting methods to joint-reinforce soft oil, this article is to research the feasibility of combining two reinforcing methods and improvement solutions for each method required by combining. In the mean time, by presenting theoretical model of combining to provide a theoretical basis for further experiments and construction projects.Based on the results of "experimental research on vacuum pressure grouting method to reinforce soft foundation", to analysis reinforcement mechanism, foundation subsidence rules, maximum pressure of grouting and the best time to vacuum grouting under situation of joint-reinforced soft oil foundation. Thus, to provide field application basis for reinforcing soft foundation by vacuum pressure grouting method.