Study Of The Calculation Method And Calculation Model Of Retaining Structure With Double-row Piles Based On Model Of Elastic Brace

Retaining structure with double-row piles, as a type of foundation pit retaining structure, is not completely studied and analyzed, and the calculations of foundation pit supporting system both in domestic and abroad are lack of sufficient consideration of the engineering reality. In this paper, retaining structure with double-row piles is taken as the object of study. Based on the realization of finite bar element by using the model of elastic brace, the effect that different factors cause to the displacement and bending moment of the retaining structure with double-row piles was probed, which provide a good theoretical basis for the design and calculation of the retaining structure with double-row piles. The main research content are as follows:1.Based on the model of elastic brace, the calculation model of retaining structure with double-row piles is established; soil bed modulus and value M are calculated through experience formula method, and the ratio of the liner effective rigidity of soil spring is calculated by M method; the soil pressure is calculated by applying the formula of Rankine soil pressure theory and amendatory Rankine soil pressure theory.2.By applying the finite element software of ANSYS, the finite element model of retaining structure with double-row piles is established.3.Applying the finite element model of retaining structure with double-row piles to analyze the factors that affect the inner force and deformation of retaining structure with double-row piles, which are the stiffness of the supporting pile, the distance between piles and the engineering geological condition.4.By combining engineering examples and applying respectively the three methods which are Rankine soil pressure formula, amendatory Rankine soil pressure formula and requirements of specification, the horizontal displacement of retaining structure with double-row pile is analyzed.