Double Pile Pit Supporting Structure Deformation Mechanism And Simplified Calculation Method

Double pile retaining structure is a new type of structure, the current structure tosimplify the calculation of the deficiencies, stress analysis of the structure of the line,draw simplified calculation methods. By engineering examples to verify thereasonableness of simplified calculation, and with the literature[51]solution, ANSYSfinite element software to do comparative analysis, analysis of the results showed that:(1) A paper analyzing the double Piles to potential slip surface to the boundary,calculate the potential slip surface above earth pressure with Rankine earth pressuretheory and earth pressure effects influence coefficients, the following potential slipsurface rectangular earth pressure distribution, soil resistance potential slip surfacebelow the spring simulation, and use a combination of elastic foundation beamdeflection force method equations pile moment, shear force, displacement valuedifferential equations.(2) The paper analytical solutions and the literature[51]comparing solutions to showthat this simplified method to calculate the resulting bending moment, shear force,displacement values compared with the literature[51]solution is small, mainly due to thesimplified calculation method this paper considers the rear pile-soil potential slipsurface body, taking into account the role of soil between piles on the front row of thepile.(3) Compared to this paper analytical solutions and numerical solutions of ANSYSshow that the bending moment, shear force, displacement values calculated by thesimplified method in this article than the ANSYS numerical solution is too large. Sincethis article does not consider the nature of the simplified calculation of potential slipsurface soil less and loads of potential slip surface was assumed that rectangulardistribution is not very accurate. In this paper, the difference of overall surface momentanalytical solutions and numerical solutions of ANSYS, shear force, displacement aresmall, indicating a reasonable simplification paper analyzes the structure of double-rowpiles.Finally, the results of this research enriches the simplified calculation method of double-row piles retaining structure for some existing analysis to complement thetheoretical calculation and design of double-row piles supporting structure has a certainreference value.