高陡边坡扶壁式支挡结构的空间作用研究

发布时间：2018-07-03 18:02

本文选题：高陡边坡 + 扶壁式支挡结构　；参考：《广州大学》2015年硕士论文

【摘要】：随着城市建设用地日趋紧张,大量商业住宅楼盘建设在山坡地上,为此必然要因地制宜的采用安全可靠的结构措施进行支挡,扶壁式支挡结构是边坡治理防护有效而经济的方式之一。土地成为稀缺资源,寸土必争,在边坡治理过程中会时常面临所预留的施工作业空间受限的情况。因此,怎样在有限的空间范围内既能保证坡体的安全稳定,又能使支挡结构占用的空间最小化是值得深入研究的。于是,分析坡体与支挡结构的协同作用以及对支挡结构各要素(构件)进行优化设计就具有一定的现实意义和工程价值。本文运用MIDAS/GTS有限元分析软件,以广州某高陡边坡多级扶壁式支挡防护工程实例为研究背景,分析了不同挡土墙高度、平台宽度、扶壁间距对上、下级支挡结构之间的作用规律。本文的具体研究内容可概括为以下几个方面:1、抓住扶壁式支挡结构的工作机理,结合现场监测实时分析得到的土压力模型,应用于库仑土压力理论,得出考虑支挡结构位移影响的库仑土压力计算模型。2、采用网格搜索法对扶壁式支挡结构进行优化设计,以扶壁式支挡结构单位长度方向上所占用的施工作业空间为目标函数,将墙面板、扶壁、踵板及趾板的截面尺寸当作设计变量,再以规范对构造要求的规定和结构的强度、稳定性等要求作为约束条件建立数学模型,运用MATLAB语言程序分析,得出在有限空间范围内扶壁式支挡结构各要素(构件)的优化设计方法。3、结合工程实例,以MIDAS/GTS有限元分析软件建立的数值模型为基础,通过调整挡墙高度、平台宽度、扶壁间距等影响因素,分析不同影响因素变化对多级扶壁式支挡结构之间的土压力传递、内力、位移以及坡体整体稳定性的影响,并将数值分析结果与相关现场监测数据进行了对比分析。
[Abstract]:With the increasing shortage of urban construction land, a large number of commercial residential buildings are built on the hillside, so it is necessary to adopt safe and reliable structural measures to support them. Supporting retaining structure is one of the effective and economical ways to control and protect slope. Land becomes a scarce resource, and every inch of land will be contested. In the process of slope treatment, it will often face the limited construction space reserved for construction. Therefore, how to ensure the safety and stability of slope body and minimize the space occupied by retaining structure in the limited space is worthy of further study. Therefore, it is of practical significance and engineering value to analyze the synergistic effect of slope and retaining structure and to optimize the design of various elements (components) of retaining structure. In this paper, using Midas / GTS finite element analysis software, taking the example of a high and steep slope in Guangzhou as the research background, the action law of different retaining wall height, platform width, the distance between the upper and lower retaining structures is analyzed. The concrete research contents of this paper can be summarized as follows: 1, grasping the working mechanism of the buttress retaining structure, combining with the earth pressure model obtained by the real time analysis of the field monitoring, applying to the Coulomb earth pressure theory. The calculation model of Coulomb earth pressure considering the displacement of retaining structure is obtained. The grid search method is used to optimize the design of the supported retaining structure. The construction work space occupied by the unit length direction of the supported retaining structure is taken as the objective function. Taking the cross section size of wall panel, support wall, heel plate and toe plate as design variable, and then taking the specification of construction requirements and the requirements of structure strength and stability as the constraint conditions, the mathematical model is established and analyzed by MATLAB program. The optimum design method of every element (component) of buttress retaining structure is obtained in the limited space. Combined with engineering example, based on the numerical model established by Midas / GTS finite element analysis software, the height of retaining wall and the width of platform are adjusted. The influence of different factors on the earth pressure transfer, internal force, displacement and the overall stability of the slope is analyzed, such as the distance between the supporting walls, and the influence of different factors on the earth pressure transfer, internal force, displacement and the overall stability of the slope body. The numerical analysis results are compared with the related field monitoring data.
【学位授予单位】：广州大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU432

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