Internal force and deformation calculation of chair retaining structure

Based on the traditional design and calculation theory of pile row, a calculation method suitable for the chair retaining structure was proposed, and the initial soil pressure distribution coefficient between the front and back piles of the chair retaining structure was improved. The chair retaining structure analysis program CRSA was compiled by Mathematica software, and the double-row pile retaining structure was calculated and compared by Lizheng deep foundation pit support design software. The analysis results show that the CRSA program is correct and can be used for practical engineering calculation and analysis. According to the concrete project, the internal force and deformation of the chair retaining structure with three different slope sections were calculated and analyzed. The analysis results show that the bending moment of the chair retaining structures was the largest at the joint of the front pile and the connecting beam. When designing the structure, the reinforcement amount at this location should be increased. The maximum value of pile shear was located at the front pile below the foundation pit bottom, and the maximum value of horizontal displacement was located at the top of the front pile. Attention should be paid to the internal force and deformation of the structure to meet the relevant requirements during design.