超深基坑桩锚支护结构GTS模拟与对比分析

发布时间：2018-06-23 14:09

本文选题：超深基坑 + 桩锚支护　；参考：《河北工程大学》2013年硕士论文

【摘要】：随着经济的发展,城市化的进程越来越快,对地下空间的开发的需求也越来越大。越来越多的超深基坑在岩土工程界诞生。超深基坑在进行设计时不仅要确保在施工中,基坑的稳固安全,还要尽可能的节约材料,这样能够很大程度上节约成本。本文主要研究的超深基坑中一种常见的支护结构——桩锚支护结构。文章主要结合石家庄槐底村二期改造的超深基坑工程中的一个典型桩锚支护区域进行展开的,具体主要研究内容如下： (1)对国内深基坑的研究现状以及有限元数值模拟方法在基坑设计方面的应用进行了阐述和总结,随后介绍了本课题的研究内容与方法； (2)介绍桩锚支护体系的特点,工作机理以及破坏模式及原因,同时,通过查阅相关资料分析总结了桩锚支护结构体系的设计计算方法,并结合工程实例,利用理正分析软件及相应的计算公式计算出了工程实例的桩锚支护结构桩体位移、土压力、剪力等等,根据计算结果进行了相应的总结分析。为工程提出一些可行性建议； (3)对MIDAS/GTS做了简单的介绍,然后从操作过程、软件的分析功能以及材料模型上对MIDA/GTS进行了阐述。随后,利用MIDA/GTS对石家庄某超深基坑建立了模型,利用有限元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、剪力及弯矩,锚杆的轴力等方面进行了全面的分析与研究,并且结合监测数据进行对比分析,得出相应的结论。对研究的实际工程的设计与施工提出了可行性的建议。通过对实际工程的计算与研究得出结论：与理正计算和实际监测的结果相比,MIDAS/GTS用于桩锚支护的模拟结果是可靠的。采用MIDAS/GTS对桩锚支护结构进行模拟设计是可行的。
[Abstract]:With the development of economy, the process of urbanization is getting faster and faster. More and more ultra-deep foundation pit is born in geotechnical engineering field. In the design of ultra-deep foundation pit, we should not only ensure the stability and safety of the foundation pit in construction, but also save the material as much as possible, which can save the cost to a great extent. In this paper, a common supporting structure-pile-anchor support structure in ultra deep foundation pit is studied. This paper mainly combines with a typical pile-anchor supporting area in the ultra-deep foundation pit reconstruction of Huaidi Village, Shijiazhuang. The main research contents are as follows: (1) the research status of deep foundation pit in China and the application of finite element numerical simulation method in foundation pit design are expounded and summarized, and then the research content and method of this subject are introduced. (2) the characteristics, working mechanism, failure mode and reason of pile anchor support system are introduced. At the same time, the design and calculation method of pile anchor support structure system is analyzed and summarized by consulting relevant data, and combined with engineering example. The pile displacement, earth pressure and shear force of pile-anchor supporting structure are calculated by using the software of positive analysis and the corresponding calculation formula, and the corresponding summary and analysis are carried out according to the calculation results. Some feasible suggestions for the project are put forward. (3) the MIDas / GTS is introduced briefly, and then the midas / GTS is described from the operation process, the analysis function of the software and the material model. Then, the model of a super deep foundation pit in Shijiazhuang was established by Mida / GTS. The finite element MIDAS-GTS was used to simulate the actual project. The stress, deformation, shear force and bending moment of the pile were analyzed in terms of soil stress, deformation, pile deformation, shear force and bending moment. The axial force of the bolt is analyzed and studied comprehensively, and the corresponding conclusions are obtained by comparing and analyzing the monitoring data. Some feasible suggestions on the design and construction of the actual project are put forward. Through the calculation and research of practical engineering, it is concluded that the simulation results of MIDAS-GTS used in pile-anchor support are reliable compared with the results of direct calculation and actual monitoring. It is feasible to use midas / GTS to simulate and design pile-anchor support structure.
【学位授予单位】：河北工程大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU473.2

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