深大基坑开挖分析及对邻近铁路的影响研究

发布时间：2018-05-26 13:16

本文选题：深基坑工程 + 开挖设计方案　；参考：《湖北工业大学》2017年硕士论文

【摘要】：在深大基坑工程实施的过程中,如何在对基坑的变形进行科学有效的控制的同时,又使得工程在安全以及经济方面有一定的保证,这是一个让人们一直在深入研究的重要问题。本文以长大屋路(东新东路—石桥路)在道路施工过程中的深基坑工程作为研究的案例,对深基坑工程进行过程中的支护框架结构的变形情况进行细致分析研究,使用有限元软件(MIDAS/GTS)对工程中的框架结构所受到的内力或者位移场作用情况进行数据分析,对支护结构的变形情况和诱发因素进行细致探讨分析,得到结论如下:(1)以该项目为背景,采用理论分析模式以及现场监测相结合,对深基坑中的变形机理进行分析探讨,对现场监测的相关数据进行计算分析,获得整个深基坑工程中支护结构的变形情况,并推断出变形规律,用以对整个工程的支护结构进行优化。(2)运用Midas/GTS软件建立三维数值模型,利用该模型对深基坑的实施情况进行数值模拟,对施工过程中的各个方面受力情况进行模拟分析,包括砖孔灌注桩所受内力、钢支撑轴力等。三维数据模型的建立,能够对基坑的稳定性以及施工过程中各方面数据统计研究,避免发生错误施工等方面起到一定的有利作用。(3)基坑开挖对邻近铁路的影响研究,通过上文提到的三维数据模型,可对数据实行动态模拟,模拟结果与实际情况基本一致。通过对模拟出的数据信息进行计算分析,分析出基坑工程实施中可能发生变形的多次情况,在实际施工过程中尽量避免这些情况的发生。模拟分析结果表明:在深基坑开挖的时候,无法保证其变形不会发生,因此会引起铁路轨道中的位移,所以在基坑开挖的时候就要尽量减少对相邻铁路轨道的影响,并对具体措施进行分析设计。
[Abstract]:In the process of deep and large foundation pit engineering, how to control the deformation of foundation pit scientifically and effectively, and at the same time make the project secure in safety and economy, this is an important problem that people have been studying deeply all the time. Taking the deep foundation pit engineering in the course of road construction as a case study, the deformation of supporting frame structure in the course of deep foundation pit engineering is analyzed and studied in detail in this paper. The finite element software Midas / GTS is used to analyze the data of the internal force or displacement field of the frame structure in engineering, and the deformation and the induced factors of the supporting structure are analyzed in detail. The conclusions are as follows: (1) based on this project, the deformation mechanism in deep foundation pit is analyzed and discussed by combining theoretical analysis model and field monitoring, and the relevant data of field monitoring are calculated and analyzed. The deformation of the support structure in the whole deep foundation pit engineering is obtained, and the deformation law is inferred, which is used to optimize the supporting structure of the whole project. The three-dimensional numerical model is established by using Midas/GTS software. The model is used to simulate the implementation of deep foundation pit, and to simulate and analyze the stress of various aspects in the construction process, including the internal force of cast-in-place pile with brick hole, the axial force of steel bracing and so on. The establishment of 3D data model can play a certain beneficial role in the stability of foundation pit, the statistical study of all aspects of data in the construction process, and the avoidance of wrong construction, etc.) the influence of foundation pit excavation on adjacent railways is studied. Through the three dimensional data model mentioned above, the data can be simulated dynamically, and the simulation results are basically consistent with the actual situation. Through the calculation and analysis of the simulated data information, it is found out that many times of deformation may occur in the implementation of foundation pit engineering, and the occurrence of these situations can be avoided in the actual construction process as far as possible. The simulation results show that during the excavation of deep foundation pit, there is no guarantee that the deformation will not occur, so the displacement of railway track will be caused, so the influence on adjacent railway track should be minimized during excavation of foundation pit. And the concrete measure carries on the analysis design.
【学位授予单位】：湖北工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU753;U211

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