深基坑综合支护结构的数值模拟分析与优化设计

发布时间：2018-03-11 15:05

本文选题：深基坑　切入点：排桩　出处：《河北工程大学》2013年硕士论文　论文类型：学位论文

【摘要】：近三十年来，我国各个领域都进入了快速发展时期，基础设施建设更是我国现阶段社会主义建设的重要组成部分。高层超高层建筑也在这样的时代背景下越来越多，而这些建筑能够从蓝图变为实物，其中一个重要的方面就是提供一个安全稳定的基坑，以便其顺利的进行上部结构的施工是。目前，国内外越来越多的学者通过理论分析和工程实践，提出了大量理论分析模型和各种支护方法，并在大量实验的基础上得到了很多可靠的实验数据。然而由于深基坑支护具有不确定性，复杂性及区域性的特点，该领域尚有许多待研究和讨论的问题，需要我们不断地完善和发展。对深基坑支护结构及合理的参数设计的研究是一个有价值的课题。本论文结合北京广华新城617地块的基坑支护工程，进行了深基坑工程的理论研究，然后对基坑支护结构在开挖过程进行了数值模拟，最后进行了基坑变形分析以及支护结构的优化设计等方面的工作。主要内容包括以下几个方面：（1）总结了桩锚支护、土钉支护结构的相关理论和计算方法，并对本工程的分析方法进行了阐述，提出了该领域尚待解决研究的问题。（2）针对北京地区土质情况及工程特性，分析其在深基坑支护中的影响，结合桩锚支护和土钉支护形式的设计理论和计算方法，对综合支护形式（上部土钉墙+桩锚支护形式）的理论和计算方法进行探讨，并对综合支护形式的整体稳定性的两种计算方法进行了比较。（3）利用理正7.0软件进行了支护结构的设计计算，同时结合有限元基本理论，采用有限元软件MIDAS-GTS建立了土钉—桩锚综合支护结构的三维模型，并将两种方法进行了比较，找出其中的差异。（4）把迈达斯GTS（整体计算方法）和理正7.0（分算法）得出的结果进行比较，通过两者之间的差距，找出方案优化的大体范围，以简化优化过程。
[Abstract]:In the past three decades, our country has entered a period of rapid development in all fields, and infrastructure construction is an important part of our socialist construction at the present stage. And these buildings can go from blueprints to physical objects, and one of the important aspects is to provide a safe and stable foundation pit so that it can proceed smoothly with the superstructure. More and more scholars at home and abroad put forward a large number of theoretical analysis models and various supporting methods through theoretical analysis and engineering practice. On the basis of a large number of experiments, many reliable experimental data have been obtained. However, due to the uncertainty, complexity and regional characteristics of deep foundation pit support, there are still many problems to be studied and discussed in this field. It is necessary for us to perfect and develop continuously. It is a valuable subject to study the support structure and reasonable parameter design of deep foundation pit. Based on the foundation pit support engineering of Beijing Guanghua Xincheng block 617, this paper studies the theory of deep foundation pit engineering, and then carries on the numerical simulation to the foundation pit support structure in the excavation process. Finally, the deformation analysis of foundation pit and the optimization design of supporting structure are carried out. The main contents include the following aspects:. 1) the related theories and calculation methods of pile-anchor support and soil-nailing support structure are summarized, and the analysis methods of this project are expounded, and the problems that remain to be solved in this field are put forward. (2) according to the soil quality and engineering characteristics in Beijing area, this paper analyzes its influence on deep foundation pit support, and combines the design theory and calculation method of pile anchor support and soil nailing support. This paper discusses the theory and calculation method of comprehensive support form (pile anchor support form of upper soil nailing wall), and compares two calculation methods of overall stability of comprehensive support form. In this paper, the design and calculation of the supporting structure are carried out by using the software of Lizheng 7.0. At the same time, combined with the basic theory of finite element, the three-dimensional model of the soil nail-pile-anchor comprehensive supporting structure is established by using the finite element software MIDAS-GTS, and the two methods are compared. Find out the difference. 4) comparing the results obtained by Midas GTS (Global Computation method) with that obtained by Reads7.0. through the difference between them, we find out the general range of scheme optimization, so as to simplify the optimization process.
【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

【相似文献】