The Open Caisson Foundation Space Finite Element Numerical Simulation Analysis

With the rapid development of technology of bridge construction, caisson foundation ismore used in many large-scale bridge structure. However, for the study of the caissonfoundation still no substantial progress in the calculation of the caisson foundation is still inuse approximate calculation, the caisson foundation during the sinking stress analysis is notclear. In view of the above problems, a further in-depth study by the force of the caissonfoundation characteristics specific content be summarized as follows:1、Describes the basic structure as well as an integral part of the caisson. Described thescope of the caisson foundation and the problems encountered during the sinking and thesolution. As background to aspects of the caisson Stress Analysis, Proposed content of thisstudy.2、For caisson sinking construction process forces carried out summary and analysis.Calculated according to the reaction force of the foot blade theory, the establishment of amechanical model system. Using this model and the model predecessors, were analyzed forthe same project, the goodness of fit is better.3、A project, for example, its bearing capacity and stability, and analyzes the caissonfoundation sinking depth with the blade foot reaction force, the relationship of the lateralfriction, verify the calculation result meets " Road and Bridge Foundation Design Code"requirements. Conservative calculations, change the material properties, the bridge to meetthe regulations allow the bearing capacity under the premise of reference for engineeringdesign.4、This project instance, analyzed by finite element modeling to simulate the stress stateof the caisson foundation in the construction process, obtained in different conditions sinkingdepth and foot blade reaction force and lateral friction relationship blade the foot stress at thetrending and analysis of the different strength of concrete caisson foundation by force,different bar diameter caisson foundation by the force of the impact, and put forward in theconstruction process should pay attention to the problem. Standardize the method ofcalculation results with finite element calculations were compared, differences in thespecification method and finite element calculations to verify the specification methodconservative, and gives some of the proposals, for the construction reference.