Comparative study on derivation algorithm of rebound recompression deformation of pump station structure based on computer finite element modeling

This project is the extension project of Baisha Zai flood drainage station, which aims to meet the flood drainage requirements of Jinshan Lake area and provide flood drainage safety guarantee for the construction of Jinshan New City. The foundation pit excavation model of pumping station was established based on computer finite element software, and the calculation method of rebound and recompression deformation of standard formula was compared. At the same time, different construction stages of excavation unloading and late loading were considered to solve the law of foundation soil rebound and recompression deformation under excavation unloading and reloading conditions. At the same time, the elastic and recompression deformation data of foundation soil after excavation are recorded, and the deformation rule is analyzed by organizing the data and the finite element software calculation results. On this basis, the empirical formula for calculating the elastic and recompression deformation of foundation soil at the bottom of sandy pebble foundation pit is proposed, which provides theoretical and empirical basis for the analogy of engineering design in the future.