深基坑桩锚支护设计与数值模拟

发布时间：2018-05-06 02:32

本文选题：深基坑 + 桩锚支护　；参考：《河北工程大学》2014年硕士论文

【摘要】：近几十年来，我国的经济得到了飞速发展，我国的城市化已成为必然趋势，城市化用地相对紧张。显然基坑工程受到周围环境的制约进一步升级，而且环境对基坑变形控制的要求也更加的严格。桩锚支护结构对施工空间有较小的需求，并能有效地控制基坑变形，因此在基坑开挖与支护过程中已被广泛应用。本文以邯郸市某基坑工程为例，在详细的介绍了桩锚支护设计理论和土压力计算理论的基础上，对该基坑进行了理论计算和稳定性分析，并利用MAIDAS/GTS软件，对基坑的开挖与支护进行数值模拟，详细分析了基坑和桩体的位移，通过改变支护桩的间距，，研究不同间距下支护桩以及土体的位移情况。主要研究内容如下：（1）对研究的背景、意义以及国内外深基坑的研究现状进行了论述，随后介绍了本课题的研究内容与方法；（2）介绍了桩锚支护的工作机理以及变形特点等，然后桩锚支护的设计与计算方法，并结合工程实例，利用理正分析软件计算出本工程包括支护桩弯矩、位移、剪力等计算结果，根据相应的结果并根据已有的理论知识分析。为实际工程下一步计划提供可行性建议；（3）首先对MIDAS/GTS做简要的阐述包括流程、主要分析功能等。随后，利用MIDAS/GTS对邯郸市某深基坑建立了模型，利用迈达斯MIDAS/GTS对实际工程进行数值模拟，从土体应力、变形、桩体的变形、锚杆的轴力等方面进行分析，并通过更改支护桩的桩间距对深基坑桩锚支护设计进行了对比分析。通过对实际工程运用理正软件计算，并且利用MIDAS/GTS做数值模拟得出以下结论：MIDAS/GTS可以用于桩锚支护结构做数值模拟分析，并且MIDAS/GTS做桩锚支护数值模拟的结果是可以被采纳的。
[Abstract]:In recent decades, the economy of our country has been developing rapidly, the urbanization of our country has become an inevitable trend, and the land for urbanization is relatively tight. It is obvious that foundation pit engineering is further restricted by the surrounding environment, and the environmental requirements for foundation pit deformation control are more stringent. The pile-anchor supporting structure has less demand for construction space and can effectively control the deformation of foundation pit, so it has been widely used in the excavation and support process of foundation pit. Taking a foundation pit project in Handan city as an example, based on the detailed introduction of the design theory of pile and anchor support and the calculation theory of earth pressure, the theoretical calculation and stability analysis of the foundation pit are carried out, and the software MAIDAS/GTS is used to analyze the stability of the foundation pit. Numerical simulation of excavation and support of foundation pit is carried out, and displacement of foundation pit and pile body is analyzed in detail. By changing the spacing of supporting pile, the displacement of supporting pile and soil under different spacing is studied. The main contents of the study are as follows: 1) the background, significance and research status of deep foundation pit at home and abroad are discussed, and then the research contents and methods of this subject are introduced. This paper introduces the working mechanism and deformation characteristics of pile-anchor support, and then the design and calculation method of pile-anchor support are introduced. In combination with engineering examples, the calculation results of this project including bending moment, displacement and shear force of supporting pile are calculated by using the software of rational and positive analysis. According to the corresponding results and according to the existing theoretical knowledge analysis. To provide feasible advice for the next step plan of actual project; First of all, a brief description of the MIDAS/GTS, including the flow, the main analysis functions and so on. Then, the model of a deep foundation pit in Handan city is established by MIDAS/GTS, and the actual engineering is simulated by Midas MIDAS/GTS. The stress of soil, deformation of pile, deformation of pile body, axial force of anchor rod are analyzed from the aspects of soil stress, deformation of pile body, axial force of anchor rod and so on. The pile anchor support design of deep foundation pit is compared and analyzed by changing the pile spacing of supporting pile. By using the straightening software to calculate the actual engineering, and using MIDAS/GTS to do the numerical simulation, the following conclusions can be drawn: 1. Midas / GTS can be used for the numerical simulation and analysis of the pile-anchor support structure, and the results of the pile-anchor support numerical simulation made by MIDAS/GTS can be adopted.
【学位授予单位】：河北工程大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU753

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