The Function Of Grading And Placing Slope In Soil Nailing Support Of Deep Foundation Pit

Soil nailing structure was invented in the early 70 s of the last century.It has been widely promoted because of its low manufacturing price and good service performance.Many countries in the world have studied and applied it.However,because of the use of soil nailing technology in our country,compared with other developed countries,the study of soil nailing technology is relatively backward,and the form of combination of various soil nailing and other structures does not appear.Therefore,there are still some deficiencies in the research of soil nailing.On the basis of previous studies,this paper summarizes the development of various soil nailing at home and abroad.The form of platform in soil nailing is discussed,and the form and rule of the combination are summarized,so as to accumulate experience for the design and support of foundation pit.This paper first introduces the concept of soil nailing,the form of damage,and briefly introduces the characteristics of several other forms of support,and summarizes the present situation of the development of soil nailing at home and abroad.Secondly,soil nailing,stress mechanism and soil pressure calculation method of soil nailing,and discusses the setting of soil nailing support changes in stress mechanism and support calculation of soil pressure,and gives the corresponding changes according to the formula,and the calculation formula of internal force of soil nail and the formula discussed.Finally,in a single layer and multiple layers,based on the theory of finite element simulation platform by using ABAQUS software,the height and width of the supporting structure and slope angle displacement of foundation pit,the influence of vertical displacement and internal force of soil nail.And with weak foundation pits under layer is simulated,and then simulate the effect on internal and external stability by using Lizheng software.