地下连续墙在深大基坑支护中的优化设计

发布时间：2018-01-08 20:22

本文关键词：地下连续墙在深大基坑支护中的优化设计　出处：《海南大学》2013年硕士论文　论文类型：学位论文

【摘要】：随着国内城市建设的持续发展,人们对地下空间的开发和利用越来越重视,城市建筑工程中涌现出越来越多的深基坑,因此,深基坑支护工程优化设计具有十分重要的经济和社会效益。本文针对地下连续墙在深基坑支护工程中的应用,建立优化分析模型,以南航三亚总部基地综合楼基坑地下连续墙支护设计为对象分析了嵌固深度、墙体厚度、支撑位置等参数变化对墙身内力、变形及周边环境的影响。得出了以下结论： (1)依据土压力理论和弹性杆系有限单元法原理,建立了地下连续墙设计计算中的土压力理论和结构受力的有限单元法分析模型。简要介绍了最优化设计理论和求解方法。 (2)对基坑开挖中地下连续墙的受力、变形以及基坑周边地表沉降进行分析,通过改变地下连续墙的设计参数(嵌固深度、墙体厚度、支撑位置等),对地下连续墙设计参数和其受力变形的关系进行了探讨。 (3)通过地下连续墙的优化评价模型,对现有地下连续墙设计方案进行优化,通过Matlab优化工具箱,计算出地下连续墙设计参数的最优取值。对比分析了优化前后的地下连续墙的受力和变形情况,得出优化后的地下连续墙方案的优越性,证明了评价模型的优越性和可行性。 (4)建立优化前后地下连续墙方案的整体三维模型,对比分析了优化前后的地下连续墙整体受力和位移情况,在变形控制满足相应规范要求的前提下,优化后的地下连续墙受力更加合理,对材料的利用率也更好,经济效益更加突出。
[Abstract]:With the continuous development of city construction, development of underground space and the use of more and more attention, city construction emerged more and more deep excavation, therefore, deep foundation pit engineering optimization design has very important economic and social benefits. According to the underground continuous wall in deep foundation pit engineering application establishment, optimization analysis model, a comprehensive building in southern Sanya headquarters base excavation of underground continuous wall supporting design as the object to analyze the embedded depth, wall thickness, position change of supporting parameters on wall internal force, deformation and affect the environment around. Draw the following conclusions:
(1) according to the earth pressure theory and the elastic link finite element method, the earth pressure theory and the finite element analysis model of the structural force under the calculation of diaphragm wall are established. The optimal design theory and solving method are briefly introduced.
(2) of the underground continuous wall in foundation pit excavation in the stress analysis and settlement deformation of foundation pit surface, by changing some design parameters of underground continuous wall (embedded depth, wall thickness, support position, etc.) on the design parameters of underground continuous wall and the force deformation relations are discussed.
(3) through the optimization and evaluation of underground continuous wall model of existing underground continuous wall design is optimized by Matlab optimization toolbox, calculate the optimal values of design parameters of underground continuous wall. Comparative analysis of the underground continuous wall before and after optimization of the stress and deformation of the underground continuous wall, the superiority of the optimized plan the feasibility and superiority of the evaluation model.
(4) the whole three-dimensional model of underground continuous wall before and after the optimization scheme, comparison and analysis of the underground continuous wall before and after the optimization of the overall stress and displacement, the deformation control to meet the corresponding standard under the premise, the underground continuous wall after optimization is more reasonable stress, the material utilization rate is better, economic benefits more prominent.

【学位授予单位】：海南大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU753

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