地铁隧道埋深岩层介质安全效应机理研究
发布时间：2018-11-15 06:32
【摘要】：由于城市人口不断增加以及迅猛发展的城市化进程,城市的建设将面对更大的挑战。交通是城市发展进步的重中之重,一个城市想要得到长期的可持续发展的未来,必须注重交通的发展。交通问题如果不能妥善的解决,就有可能致使城市的崩溃。这时大力发展轨道交通就能促使城市建设朝着更好的方向发展。但是,大量修建地铁隧道会使地层受到扰动,引发四周的地层产生移动及应力重分布。由于地铁隧道存在埋深的问题,那么怎样规划隧道的埋深是一项重要的任务。其次,隧道在城市中的开挖会对建筑物造成影响,那么对隧道和建筑物进行风险评估就非常重要。本文进行的主要工作如下:①本文深入地分析了隧道施工过程中开挖引起的地层移动与变形的几个方面,包括:衬砌的变形、施工过程中造成的地层损失、土体四周孔隙水变化的情况以及在剪力破坏下的土体再固结。这里面地层的损失与地层排水引发的地层表面的移动及变形是最重要的。②本文还对造成地表移动的几个因素(开挖的深度、开挖的断面大小及开挖所处的地层条件)分别做了阐述和分析。③地层是隧道和上部结构联系的唯一介质,建筑物状态的好与坏完全由地层状况和其产生的支承作用决定。隧道—土体—建筑物动态相互作用是十分复杂的,三者构成了一个包含多元结构、多因素的综合体系。④对隧道和建筑物之间的相互影响进行了分析,包括偏移距离、埋置深度、围岩的级别,基础的刚度等因素。通过分析可以发现,隧道和建筑物存在相互作用的时候,隧道的最不利的位置为在建筑物边缘的时候,并不是处于建筑物正下方的时候。⑤提出了风险的相关概念,阐明了风险的产生的过程及风险控制的基本思路,并提出了运用风险的突变分析理论对隧道风险进行分析。
[Abstract]:With the increasing of urban population and the rapid development of urbanization, urban construction will face more challenges. Traffic is the most important part of urban development and progress. If a city wants to obtain long-term sustainable development, it must pay attention to the development of traffic. If the traffic problem can not be solved properly, it may lead to the collapse of the city. At this time, the development of rail transit can promote urban construction towards a better direction. However, a large number of subway tunnels will disturb the strata and cause the surrounding strata to move and stress redistribution. How to plan the depth of subway tunnel is an important task because of the problem of buried depth in subway tunnel. Secondly, the tunnel excavation in the city will have an impact on the building, so it is very important to assess the risk of the tunnel and the building. The main work of this paper is as follows: 1 this paper deeply analyzes several aspects of stratum movement and deformation caused by excavation during tunnel construction, including: deformation of lining, formation loss caused during construction, The change of pore water around soil and the soil reconsolidation under shear failure. The loss of the stratum and the movement and deformation of the stratum surface caused by the drainage are the most important. 2 the paper also analyzes several factors that cause the surface movement (the depth of the excavation, the depth of the excavation). (3) the stratum is the only medium for the connection between the tunnel and the superstructure, and the good or bad state of the building is completely determined by the formation condition and its supporting function. The dynamic interaction between tunnel, soil and building is very complicated, and the three constitute a comprehensive system with multiple structures and many factors. 4 the interaction between tunnel and building is analyzed, including the offset distance. Buried depth, surrounding rock grade, foundation stiffness and other factors. From the analysis, we can find that when there is interaction between tunnel and building, the most disadvantageous position of tunnel is at the edge of the building, not when it is directly below the building. This paper expounds the process of risk generation and the basic idea of risk control, and puts forward the analysis of tunnel risk by using the catastrophe analysis theory of risk.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU45;U231.3
本文编号：2332395
[Abstract]:With the increasing of urban population and the rapid development of urbanization, urban construction will face more challenges. Traffic is the most important part of urban development and progress. If a city wants to obtain long-term sustainable development, it must pay attention to the development of traffic. If the traffic problem can not be solved properly, it may lead to the collapse of the city. At this time, the development of rail transit can promote urban construction towards a better direction. However, a large number of subway tunnels will disturb the strata and cause the surrounding strata to move and stress redistribution. How to plan the depth of subway tunnel is an important task because of the problem of buried depth in subway tunnel. Secondly, the tunnel excavation in the city will have an impact on the building, so it is very important to assess the risk of the tunnel and the building. The main work of this paper is as follows: 1 this paper deeply analyzes several aspects of stratum movement and deformation caused by excavation during tunnel construction, including: deformation of lining, formation loss caused during construction, The change of pore water around soil and the soil reconsolidation under shear failure. The loss of the stratum and the movement and deformation of the stratum surface caused by the drainage are the most important. 2 the paper also analyzes several factors that cause the surface movement (the depth of the excavation, the depth of the excavation). (3) the stratum is the only medium for the connection between the tunnel and the superstructure, and the good or bad state of the building is completely determined by the formation condition and its supporting function. The dynamic interaction between tunnel, soil and building is very complicated, and the three constitute a comprehensive system with multiple structures and many factors. 4 the interaction between tunnel and building is analyzed, including the offset distance. Buried depth, surrounding rock grade, foundation stiffness and other factors. From the analysis, we can find that when there is interaction between tunnel and building, the most disadvantageous position of tunnel is at the edge of the building, not when it is directly below the building. This paper expounds the process of risk generation and the basic idea of risk control, and puts forward the analysis of tunnel risk by using the catastrophe analysis theory of risk.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU45;U231.3
【参考文献】
相关期刊论文 前2条
1 刘波;陶龙光;李希平;唐孟雄;;地铁盾构隧道下穿建筑基础诱发地层变形研究[J];地下空间与工程学报;2006年04期
2 毛儒;隧道工程风险评估[J];隧道建设;2003年02期
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