地铁车站深基坑开挖对临近建筑物影响的监测及数值模拟研究

发布时间：2018-05-02 14:03

本文选题：深基坑 + ANSYS　；参考：《石家庄铁道大学》2014年硕士论文

【摘要】：近年来，我国的许多城市正在逐步建立和规划着建设城市地铁工程项目，随之而来的会产生大量的深基坑施工过程中的问题，并与深基坑开挖深度和规模逐步扩大有着密切的关联，这也将是许多新的土木工程需要解决的问题。尤其是在我国的城市，建筑物所处位置相对比较集中的区域，地下管道分布比较密集复杂的地段，施工条件要求较高的交通要道的区段，深基坑开挖过程中的安全性和稳定性、施工过程中影响周围环境以及由此产生的问题所造成的城市环境建设和交通管理问题已成为地铁工程项目建设的重点和难点问题。本文以无锡市河埒口地铁车站深基坑开挖过程为例，通过有限元软件ANSYS，对于深基坑开挖过程对周围临近建筑物的影响以及现场监测数据分析的结果进行了讨论，通过大量地搜集有关无锡市河埒口地铁车站的设计资料以及周围的水文地质资料，来得到与建模相关的计算参数，通过对深基坑的开挖过程进行了分析，对在不同施工工况的情况之下，应用ANSYS仿真数值模拟的方法，，建立了地下连续墙、钢筋混凝土支撑、钢支撑、土层以及周围临近建筑物作为一个整体系统的有限元模型，分析在深基坑开挖过程开挖过程中土层的变形、地下连续墙变形和受力情况以及内支撑的应力分布。与此同时，对河埒口地铁车站深基坑现场监测数据进行分析：主要分析居民楼竖向位移、居民楼附近地表竖向位移、居民楼附近墙体深层水平位移、居民楼附近土体深层水平位移、混凝土支撑轴力、钢支撑轴力。然后将这些现场监测数据与数值仿真模拟结果进行对比分析。得出两个数据基本一致，这就可以对于数值仿真模拟过程所得出的结果进行验证，这就可以为以后的地铁车站深基坑的安全施工提供了一定的理论依据以及实践指导性的现实意义。
[Abstract]:In recent years, many cities in our country are gradually establishing and planning urban subway projects, which will lead to a large number of problems in the construction process of deep foundation pit. It is closely related to the depth and scale of deep foundation pit excavation, which will also be a problem to be solved in many new civil engineering projects. Especially in the cities of our country, where the buildings are relatively concentrated, where the underground pipelines are distributed in dense and complex areas, where the construction conditions are higher, the sections of the main roads, the safety and stability of the deep foundation pit during the excavation process, The problems of urban environmental construction and traffic management caused by the influence on the surrounding environment and the resulting problems in the construction process have become the key and difficult problems in the construction of subway engineering projects. Taking the excavation process of deep foundation pit of Heyukou subway station in Wuxi as an example, the influence of excavation process on nearby buildings and the results of field monitoring data analysis are discussed by means of finite element software ANSYS. By collecting a large number of design data and hydrogeological data about Heyukou subway station in Wuxi City, the calculation parameters related to modeling are obtained, and the excavation process of deep foundation pit is analyzed. Under different construction conditions, the finite element model of underground continuous wall, reinforced concrete bracing, steel bracing, soil layer and adjacent buildings as a whole system is established by using the method of ANSYS simulation numerical simulation. The deformation of soil layer, deformation and stress of underground continuous wall and stress distribution of inner support during excavation of deep foundation pit are analyzed. At the same time, the field monitoring data of deep foundation pit of Hechuankou subway station are analyzed: the vertical displacement of residential building, the vertical displacement of surface near residential building, the deep horizontal displacement of wall near residential building, Deep horizontal displacement of soil around residential building, axial force of concrete support and axial force of steel support. Then the field monitoring data and numerical simulation results are compared and analyzed. It is concluded that the two data are basically the same, which can be used to verify the results of the numerical simulation process. This can provide a certain theoretical basis and practical significance for the safe construction of deep foundation pit of subway station in the future.
【学位授予单位】：石家庄铁道大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U231.3;TU196

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