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3-D Finite Element Simulation of Deep Foundation Pit Excavation and Supporting

Author: ChenZhiMing
Tutor: LuPeiYi
School: Tianjin University
Course: Structural Engineering
Keywords: Excavation Engineering Three-dimensional elastic-plastic Measured Contact surfaces Support system Elastic foundation beam method
CLC: TU473.2
Type: Master's thesis
Year: 2010
Downloads: 246
Quote: 0
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Abstract


In recent years, the pit of the plane shape and form of support increasingly complex with the development of excavation engineering has become increasingly evident effect of pit space , the conventional pit analysis and design methods can not meet the engineering requirements , the paper in depth discussion of the advantages and disadvantages of the pit design elastic foundation beam analysis methods based on a three-dimensional finite element analysis methods by considering soil structure interaction . Instance of a concrete foundation pit engineering for the Tianjin region , with strong nonlinear analysis capabilities of ABAQUS software , the overall three - dimensional finite element model considering the soil envelope structure and support system together , Moore model - Coulomb elastoplastic model to simulate the soil , using the contact element to simulate the contact between the soil and the building envelope , to simulate the whole process of the foundation pit excavation and support through the life and death cell function . Analyzed the distribution of internal forces and deformation of the envelope and the support system under various conditions of soil pressure distribution , through the comparison of the calculated and measured values ??, verify the reasonableness of this calculation model based on finite element results and applicability. Then by changing the finite element model , this paper using single factor analysis method to study the role of the contact between the soil and the building envelope , soil modulus , the stiffness of the building envelope and buried depth the impact of the pit internal forces and deformation been some useful conclusions . Article last pit design method of elastic foundation beam plane finite element calculation and analysis , internal forces and deformation values ??of the comparison of two analytical methods PILE and support system to analyze the causes of differences and discuss the respective Engineering applicability . The analysis methods and conclusions of this article is to provide some reference similar the excavation engineering analysis design .

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CLC: > Industrial Technology > Building Science > Soil mechanics,foundation engineering > Foundation > Pile foundation and deep foundation > Deep Foundation
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