Gsps, Soft Base Reinforcement System Mechanism And Applied Research In Chengdu Ring Expressway

With the rapid development of the construction of high level highways, more and more highways are built on the soft foundation. The quality of SFT (soft foundation treatment) directly affects the quality and the time limit of the project. So the research of new technologies of SFT has become an imminent task.In this paper a new consolidation system named GSPS( geogrid stone pile system) is advanced, which is a generic term of the three treatments of geogrid stone piles, sand underlay and ribbed base. The GSPS system has been tested in A branch road of N contracted part of ChengDu express way. Meanwhile, the mechanics of GSPS system was researched in this paper through the method of FEM(Finite Element Method). On the foundation of the experiment datum and the related materials, put up a design method of GSPS by subside criterion and carrying capacity of roadbed. It can be seen from the experiment that the method is successful. It can shorten construction time, lower the cost and get better results with less equipments.