Numerical Analysis Of The Soft Soil Foundation Supporting And The Application In Design And Construction Management

The finite element method can solve nonlinear problems, Simulate a variety of complex material constitutive, Solve a variety problems of complex boundary conditions, And comparison and optimization of various programs. Precisely because of these characteristics, geotechnical applications become more and more attention in recent years. However, due to the particularly complex problem of three-dimensional space, subject to the limitations of computer hardware, it takes a lot of time:very difficult to determine soil constitutive model selection and parameter uncertainty due to soil engineering geological parameters; lot of theoretical and practical engineering problems need to be solved and perfected. In this paper, we have a three-dimensional numerical simulation analysis to the Xian Lin soft soil deep foundation excavation by the ABAQUS software, Analog pit design conditions, comparative analysis and engineering practice. And by changing the model parameters set, To optimize design of the pit design and construction, Provide a reference for actual engineering design and construction, Also provide a useful reference for future soft soil area excavation engineering design and construction. This paper studies the content is as follows:Through the analysis of practical engineering design and construction conditions, and select a certain period of the project, establish a three-dimensional model by the finite element software ABAQUS. Analyzed the pit deformation, surrounding settlement and envelope structure system; analyzed impact to the surrounding settlement and envelope structure system by different excavation methods, than compared with the actual engineering monitoring data. The results show that the use of three-dimensional finite element numerical simulation analysis method can better reflect the actual construction process, similar to the actual construction monitoring data.Through the analysis of practical engineering design and construction conditions by the finite element software ABAQUS, change the settings for the model parameters of the three-dimensional space. Analyzed pile diameter and spacing, Support system for the size and structure of the form, Excavation sequence and scope and other factors how to affect the the surrounding settlement and envelope structure system. The results show that:the increasing pile diameter, change the pile spacing can effectively restricted pit deformation, reasonable and effective optimization of the design and construction of the pit design.We proposed oppression construction method based on the three-dimensional finite element numerical simulation. By the principle of big pit, small excavation, layer and section, symmetrical balance, limited support to dynamic design and information construction. To reduce the pit not support retaining exposure to the time and space. During excavation effectively reduce the impact on the surrounding environment, provide a useful reference for the design and construction of deep foundation pit in the soft soil area in the future.