基于某工程CFG桩复合地基的沉降计算及有限元分析

发布时间：2018-02-06 04:09

本文关键词： CFG桩复合地基沉降变形有限元法　出处：《河北大学》2017年硕士论文　论文类型：学位论文

【摘要】：随着技术的发展及复合地基的广泛应用,CFG桩复合地基在理论研究方面和工程实践方面均取得了较大的进展。复合地基沉降变形在理论方面的研究,一定程度上,仍落后于工程实践。目前应用广泛的复合地基沉降的几种计算方法,为工程实践提供了一定的理论基础,但是这些沉降计算方法和理论公式均存在不同的问题和难点。因此,研究CFG桩复合地基的沉降变形具有重要的现实意义。本文以唐山市某工程的CFG桩复合地基为研究对象,利用有限元软件ANSYS建立了CFG桩复合地基的沉降计算模型,分析了参数改变对CFG桩复合地基沉降的影响。本文主要研究内容如下:应用有限元软件ANSYS建立了CFG桩复合地基沉降计算的数值模型,并对其进行了模拟运算,将计算结果与实际测量结果进行对比,验证了模型的准确性;根据建立的有限元模型,研究了参数改变:桩长、桩径、桩距、桩体强度,对CFG桩复合地基沉降以及CFG桩桩身应力的影响。采用数值模拟的方法,针对本工程的CFG桩复合地基设计方案做出改变,对不同的设计方案进行比较,对比得到的结论,得出基于实际工程的优化建议。
[Abstract]:With the development of technology and the wide application of composite foundation, great progress has been made in theory research and engineering practice of CFG pile composite foundation. To some extent, it still lags behind engineering practice. At present, several calculation methods of composite foundation settlement are widely used, which provide a certain theoretical basis for engineering practice. However, these settlement calculation methods and theoretical formulas have different problems and difficulties. It is of great practical significance to study the settlement and deformation of CFG pile composite foundation. This paper takes the CFG pile composite foundation of a project in Tangshan city as the research object. The settlement calculation model of CFG pile composite foundation is established by using finite element software ANSYS. This paper analyzes the influence of parameter change on the settlement of CFG pile composite foundation. The main contents of this paper are as follows: the numerical model of settlement calculation of CFG pile composite foundation is established by using finite element software ANSYS. The simulation results are compared with the actual measurement results, and the accuracy of the model is verified. According to the established finite element model, the effects of parameter changes, such as pile length, diameter, distance, strength of pile, on settlement of CFG pile composite foundation and stress of CFG pile body, are studied by numerical simulation method. According to the change of the CFG pile composite foundation design scheme of this project, the paper compares the different design schemes, compares the conclusions, and draws the optimization suggestions based on the actual engineering.
【学位授予单位】：河北大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU473.1

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