基于RFPA模拟深基坑边坡滑动机理分析

发布时间：2018-04-01 04:15

本文选题：边坡　切入点：RFPA软件　出处：《大连理工大学》2015年硕士论文

【摘要】：随着国民经济的高速增长,建筑工程及其他建设项目更加高速地发展。深基坑工程作为各种建设工程的前期和基础性工作,对于建筑工程能否顺利实施起到决定性的作用。通过工程技术人员和科技工作者共同努力,以及计算机技术已达到一个新的水平,工程质量也不断提高。本文以天津市某银行综合业务楼项目为模型,研究深基坑开挖后的边坡变形问题。通过RFPA软件模拟与实际观测进行对比、得以更加准确详细地分析。这样,有助于积累类似工程的经验,进而应用科学的方法进行现代化建设。通过RFPA软件进行模拟,直观地得到坡体滑移破坏面,并求得安全系数。由即得的边坡潜在破坏面和稳定安全系数对基坑工程稳定性进行判断,评定支护措施发挥的作用。经过与实际监测情况的对比,判断RFPA软件模拟对于边坡稳定性分析是否实用。本文主要采用RFPA强度折减法的基本原理,这类方法具有非常突出的优点,不必预先假设滑动破坏面的方位和形状,采用不断降低岩土体自身强度的方式,最终是坡体模型发生破坏,一般发生在边坡模型强度最薄弱的环节,用此种方法来确定遭受剪切力破坏的部位,最终根据相应的剪切滑动面来分析对应的边坡稳定安全系数。因此,以此项目的地质勘察报告的数据作为参数的来源,以基坑的变形观测报告的实际数据作为基准,根据现场参数进行RFPA软件模拟。经过模拟边坡支护与无边坡支护的边坡失稳过程,有助于加深对边坡破坏过程的理解。通过理论与具体施工项目的比较,进行经验的积累,有助于类似的项目工作更加顺利地开展,进而节约整个社会的时间成本和经济成本。
[Abstract]:With the rapid growth of the national economy, construction projects and other construction projects are developing at a higher speed. Play a decisive role in the smooth implementation of construction projects. Through the joint efforts of engineering technicians and scientific and technological workers, and computer technology has reached a new level, The engineering quality is also improving continuously. This paper takes a comprehensive business building project of a bank in Tianjin as a model to study the problem of slope deformation after deep foundation pit excavation. The simulation results are compared with the actual observation by RFPA software. In this way, it will be helpful to accumulate experience of similar engineering and to use scientific methods to carry out modernization construction. The slip failure surface of slope body can be obtained intuitively by simulation with RFPA software. The safety factor is obtained. The stability of foundation pit engineering is judged by the potential failure surface and the stability factor of the slope, and the function of supporting measures is evaluated. In this paper, the basic principle of RFPA strength reduction method is used to determine whether the RFPA software simulation is useful for slope stability analysis. This kind of method has very outstanding advantages and does not need to presuppose the orientation and shape of the sliding failure surface. In order to reduce the strength of rock and soil continuously, the failure of slope model is the final one, which usually occurs in the weakest link of slope model. This method is used to determine the site of shear failure. Finally, according to the corresponding shear slip surface, the corresponding slope stability safety factor is analyzed. Therefore, the data of the geological survey report of the project is taken as the source of the parameters, and the actual data of the deformation observation report of the foundation pit is taken as the benchmark. According to the field parameters, the RFPA software is used to simulate the slope failure process, which is helpful to the understanding of the slope failure process. Through the comparison between the theory and the concrete construction project, the experience is accumulated. Help similar projects to work more smoothly, thereby saving the time and economic costs of the whole society.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P642.22;TU473

【参考文献】