The Analysis Of Internal Forces And Deformation Of Deep Foundation About Combined Retaining Structure

Based on the worker cultural activities center which is a comprehensive renovation project in taiyuan railway, aiming at the complex adverse factors such as large deep foundation pit excavation area, adjacent to buildings, the strict environment and supporting structure. The analysis is made on the internal forces and deformation of deep foundation about combined retaining structure.Using Flac3 d three-dimensional finite difference software and Moore coulomb constitutive model, we simulate the crown beam, reinforced concrete piles, and the combination of the steel pipe support support form. And we use entity unit to simulate reinforced concrete piles, set up a contact surface between soil pile friction into consideration. Crown Beam and steel pipe support is used to simulate beam element.The paper expounds with Flac3 d three-dimensional finite difference method of retaining structure software to create complex, introduced solid elements to create arbitrary place piles method and the method of connection is established between different structural unit. Moore cullen elastic-plastic three-dimensional excavation calculation model is established, analyzes the combination supporting structure internal force and deformation law problems and analyses the influence on surface subsidence laws of foundation pit excavation. Is obtained for the design of basic principles of the foundation pit and foundation pit deformation mechanism, to provide the reference for the construction of the similar deep foundation pit engineering.