A Deformation Analysis Of Internal Supporting Foundation Pit Adopting Suspended Diaphragm Wall

This paper takes the excavation engineering of Yuancun Station of the 21 st line of Guangzhou metro as the research object. It makes an analysis of the deformation law of the excavation which locates at the dual-structure strata with upper soil and nether rocks and adopts suspended diaphragm wall as well as internal supporting. The major contents of this paper are listed as follows:(1) Analyze the design pattern of suspended diaphragm wall. Divide the suspended diaphragm wall into two parts based on the bottom of the wall as the boundary and then analyze these two parts respectively. Introduce some special construction technology of suspended diaphragm wall.(2) Summarize the deformation law of the excavation at Yuancun Station of the 21 st line. Utilize finite element software to make a simulation analysis so as to get the deformation law of the excavation adopting suspended diaphragm wall. Make a comparison between the actual deformation values and simulated ones to find the differences.(3) Select different soil parameters for excavation with suspended diaphragm wall. Change the rock-socketed length, rock shoulder width and the prestressing force of the anchor rope of the suspended wall. Change the size of the supporting structure. Analyze the influence of overloaded ground to the deformation of the excavation with suspended wall. Through the measures mentioned above, this paper expects to obtain the deformation laws of the excavation with suspended diaphragm wall and internal supporting system in the circumstances of various parameters.(4) Make a comparison between the schemes of respectively adopting common diaphragm wall and suspended diaphragm wall at the same excavation. Analyze the differences between the deformation tendencies and maximum deformations of these two situations.