Study On Deformation Of Supporting Structure In Deep Foundation Pit Based On Finite Element Method

For the case of deep foundation pit, firstly, this paper makes detailed analysis and summarizing. Secondly, researches on using FEM method to analysis the deep excavation and support system has been done. Finally, a case study has been done by using FEM method. The main contents and results are as following:1. Different methods, which contains the common calculation means and soil pressure problems, about the supporting and designs of deep excavation are analyzed and contrasted, and the advantages and disadvantages of each method are concluded.2. Makes detailed analysis about the 16 data of construction monitoring from the case of deep excavation named Jiu Long International underground carbarn which lies in LianYungang, and plots different construction monitoring points' curves of horizontal displacement values and time, then a comparative analysis is made and the result is got that number 1,2 and 5 have bigger values than others. Advises are made that reducing the speed in those dangerous areas and strengthens supporting in those three areas, such as properly increases supporting stiffness.3. In order to make the model calculation constringency and both of soil and peg are harmonious with transmutation, the model is simplified properly and the Young's modulus of soil is amended in the course of simulating the case of deep excavation, the results approve that it is rational.4. It indicates that the final values of horizontal displacement from simulating the case of deep excavation are smaller than the data of construction monitoring prevalently. The most important factor is that without regarding to circumstance around the deep excavation besides the error of building model.