浅埋暗挖隧道施工对邻近建筑物的影响规律研究

发布时间：2018-01-16 16:36

本文关键词：浅埋暗挖隧道施工对邻近建筑物的影响规律研究　出处：《福州大学》2014年硕士论文　论文类型：学位论文

【摘要】：当前,我国越来越多的城市快速公路、城际铁路、城市地铁等投入建设,需要开挖越来越多浅埋暗挖隧道。这些浅埋暗挖隧道往往穿越一些住宅密集区,浅埋暗挖隧道施工对地表邻近建筑的影响不可避免。因此,对浅埋暗挖隧道施工引起地表变形以及对邻近建筑物变形的影响规律进行分析,为不同条件下邻近建筑物可能发生的变形进行分析和预测,如何通过有效的手段来减小施工过程中的地表变形和邻近建筑物的变形以及在什么施工阶段建筑物的变形较大已经成为城市地下工程建设中必须解决的一项重要课题。本文在系统查阅了国内外相关研究成果、讨论了不同研究方法的基础上,以穿越住宅密集区的双线浅埋暗挖铁路隧道为例,采用数值分析方法对不同因素下浅埋暗挖隧道的施工对地表变形和邻近建筑变形的影响规律进行分析。得出了不同空间关系(即建筑中线与隧道中线距离不同、隧道埋深不同、建筑长轴线与隧道中线夹角不同)条件下,不同上部荷载和不同建筑基础厚度条件下,采用不同施工方法(三台阶法、CRD法和双侧壁导坑法)条件下,浅埋暗挖隧道施工对邻近建筑的影响规律。文中主要对地表沉降、建筑基础沉降、建筑基础挠曲率和建筑基础扭曲率四个方面的变化规律进行了分析和总结。本文主要内容如下(1)浅埋暗挖隧道施工引起的地表变形及其对邻近建筑影响的理论研究。重点对隧道施工引起临近建筑损伤的机理及临近建筑的主要破坏模式等进行分析和总结。(2)在归纳总结国内外研究成果的基础上,得出评估隧道施工对临近建筑影响的方法、主要评价指标及评估准则。(3)采用数值分析的方法,对建筑与隧道不同空间关系(即建筑中线与隧道中线距离不同、隧道埋深不同、建筑长轴线与隧道中线夹角不同)条件下,隧道施工对临近建筑的影响规律进行研究。(4)采用数值分析的方法,对不同上部荷载和不同建筑基础厚度条件下,隧道施工对邻近建筑的影响规律进行研究(5)采用数值分析的方法,对采用不同施工方法(三台阶法、CRD法和双侧壁导坑法)条件下,隧道施工对邻近建筑的影响规律进行研究。
[Abstract]:At present, more and more urban expressway, inter-city railway, urban subway and other investment construction, need to dig more and more shallow tunneling tunnels, these shallow buried tunnels often pass through some residential areas. The influence of shallow excavation tunnel construction on the surface adjacent buildings is inevitable. Therefore, the law of surface deformation caused by shallow underground excavation tunnel construction and the deformation of adjacent buildings are analyzed. The possible deformation of adjacent buildings under different conditions is analyzed and forecasted. How to reduce the surface deformation during construction and the deformation of adjacent buildings by effective means has become an important problem in the construction of urban underground engineering. Subject. This paper systematically consulted the domestic and foreign related research results. Based on the discussion of different research methods, this paper takes the double-track shallow burying railway tunnel through the dense residential area as an example. The influence of shallow tunneling construction on surface deformation and adjacent building deformation under different factors is analyzed by using numerical analysis method. Different spatial relationships (i.e. the distance between the building center line and the tunnel center line are different) are obtained. Different construction methods (three step method) are adopted under the condition of different buried depth of tunnel and the angle between long axis and middle line of tunnel. Under different upper loads and different thickness of building foundation, different construction methods are adopted. Under the condition of CRD method and double-sidewall tunnel method, the influence of shallow tunneling construction on adjacent buildings is discussed. In this paper, the ground subsidence and foundation settlement are mainly discussed. This paper analyzes and summarizes the variation law of the flexure ratio of building foundation and the distortion rate of building foundation. The main contents of this paper are as follows: 1). Theoretical study on surface deformation caused by shallow excavation tunnel construction and its influence on adjacent buildings. Analysis and summary of the mechanism of adjacent building damage caused by tunnel construction and main failure modes of adjacent buildings etc. (. 2) on the basis of summing up the research results at home and abroad. The method to evaluate the impact of tunnel construction on adjacent buildings, the main evaluation indicators and evaluation criteria. 3) the use of numerical analysis method. Under the condition of different spatial relationship between building and tunnel (that is, the distance between the building center line and the tunnel center line is different, the depth of the tunnel is different, and the angle between the long axis of the building and the center line of the tunnel is different). The influence of tunnel construction on adjacent buildings is studied. (4) numerical analysis method is used to study the different upper loads and different building foundation thickness. The influence of tunnel construction on adjacent buildings is studied 5) numerical analysis method is adopted, and different construction methods (three class method CRD method and double side wall guide pit method) are used. The influence of tunnel construction on adjacent buildings is studied.
【学位授予单位】：福州大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U455;TU196

【相似文献】