唐山时代广场深基坑边坡稳定性的数值模拟应用研究

发布时间：2018-02-02 16:08

本文关键词： 边坡稳定性数值模拟支护 ANSYS　出处：《河北联合大学》2014年硕士论文　论文类型：学位论文

【摘要】：21世纪的今天，人们对地下空间的利用不断激增，深基坑工程的规模不断向更深、更大的方向的发展，在开挖基坑过程中必然会引起土层的位移变形。因此研究基坑在开挖过程中土体的变形及土体与支护结构的稳定性已经成了至关重要的问题，对预测基坑开挖可能造成的影响具有十分重要的意义。系统介绍了常用的基坑支护方法及一般使用范围，分析了基坑工程中常用的土压力方法，介绍了大型岩土工程有限元分析软件ANSYS，并以唐山时代广场基坑工程实例为背景，在基坑开挖过程中，利用ANSYS，建立了唐山时代广场基坑开挖与支护工程的有限元分析模型。采用软件的Druck-Prager本构模型对土体进行模拟分析，同时设置了六个开挖工况，来模拟与分析基坑的真实开挖和支护的全过程，分析基坑开挖过程中基坑侧壁土体应力，，水平位移，剪切应力以及围护桩锚轴力的变化。通过分析，总结出基坑开挖和支护的过程中，基坑支护结构受力以及基坑侧壁土体水平位移的一般规律，为今后相类似基坑工程设计、施工及支护提供了一定的指导意义。
[Abstract]:In twenty-first Century, people's use of the underground space continues to surge, deep foundation pit engineering scale becomes deeper and deeper, more development direction, in the excavation process will cause soil displacement. Therefore study on excavation deformation of the soil and the soil and supporting structure stability has become a crucial the problem has very important significance to predict the effect of pit excavation may cause.
The system introduces the common foundation pit supporting method and the general scope of use, the analysis of soil pressure method commonly used in foundation pit engineering, introduces the finite element analysis software of geotechnical engineering, ANSYS, and the Tangshan Times Square excavation project as the background, the use of ANSYS in the excavation process, and the establishment of the Tangshan Times Square excavation finite element analysis and support engineering model. Using Druck-Prager software to simulate and analyze the soil constitutive model, and set up six excavation conditions to simulate and analysis the real foundation excavation and support of the entire process, analysis of foundation pit excavation wall soil stress, horizontal displacement, change of shear the stress and the axial force of the anchor pile.
Through analysis, the general rule of foundation pit supporting structure and horizontal displacement of foundation pit side wall during excavation and supporting is summarized, which provides a guiding significance for similar foundation pit engineering design, construction and support in the future.

【学位授予单位】：河北联合大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU473.2

【参考文献】