The Static Bearing Performance Research And The Dynamic Response Analysis Of Shaft Diaphragm Wall

Shaft diaphragm wall foundation has a strong carrying capacity, resistance to lateral load capability, easy construction and many other advantages. As a new base form of a bridges, with the conduct of the trials and modeling studies, which compared to other forms of foundation and good economic advantages are increasingly apparent. In this paper, using numerical simulation method under seismic load bearing behavior and basic static shaft diaphragm wall foundation load capacity of liquefaction resistance were explored. The main contents and conclusions are as follows:(1) The development of diaphragm wall, the classification and the application status in the bridge foundation were discussed, and the research course on liquefaction was summarized.(2) The static load performance of shaft diaphragm wall was analyzed by using FLAC3D software, and the study of its vertical loading performance was focused.(3) The influence degree to the bearing capacity of shaft diaphragm wall foundation of the physical and mechanical properties of the soil, such as cohesion, internal friction angle, shear modulus, density and bulk modulus were explored. The results show that:the better the soil, the greater the carrying capacity of the wall, and when the wall increases to a certain size (up to26m deepth wall or7m width), continue to increase in size cannot enhance its carrying capacity.(4) FLAC3D was used to simulate the response of the shaft diaphragm wall foundation under earthquake loads for the first time. Concluded shaft diaphragm wall foundation is capable of protecting the core earth, and blocking the trend of sand liquefaction; Lateral stiffness of the foundation is able to meet the requirements of the wall to resist the lateral seismic action.