The FEM Analysis Of Soil Nailing Wall In Construction Process And Earthquake Action

In these years, more and more soil nailed retaining structures have been used in foundation pit excavations. However, the relevant theoretical study on such retaining structure far behind the engineering practice. For example, many Finite Element Analysis methods of soil nailed retaining structure regard it as a plane problem or a partial spatial one, but the whole three dimensions analysis method is seldom found. Furthermore the study of the behavior and mechanism of the soil nailed wall of the excavations in northwest loess zone should be strengthened. Especially the FEM analysis of the dynamic response of the soil nailed wall which subjected to earthquake, the retaining structure coupled pore pressure are studied rarely.Firstly with the help of the finite element software ADINA, which is especially useful to civil engineer, this paper demonstrates an actual soil nailed retaining structure. The horizontal displacement of the soil nailed wall, settlement of ground surface, and the tensile force variation principles of nails were calculated and analyzed. And the working principle and tensile force performances of soil nail are concluded.Subsequently, parametric studies are applied to examine the effects of several factors on the deformation and nail tension by FEM calculating on the basic of above. These factors include the soil nail length, horizontal spacing and the properties of soil. The effect principle is discussed and generalized.At last, the dynamic response of the soil nailed wall is analyzed and discussed. And the variation principles of the soil nailed wall which subjected to the earthquake, and the earthquake coupled with pore pressure, are demonstrated respectively.