公路边坡表面变形监测及工程应用

发布时间：2018-01-17 12:48

本文关键词：公路边坡表面变形监测及工程应用　出处：《重庆交通大学》2015年硕士论文　论文类型：学位论文

【摘要】：随着我国基础建设的不断完善,公路交通的不断发展,高等级公路、新建公路及改建公路过程中难免产生大量的边坡,但由于受自然地质构造和人工活动的影响,边坡失稳破坏日趋增加。如何对边坡进行监测分析其稳定性,最终对边坡变形趋和失稳破坏势进行预测,从而降低或者避免边坡失稳破坏带来的人员伤亡以及经济损失显得非常重要。论文的主要研究内容:采用激光测距技术进行了边坡表面位移变形监测,基于位移监测结果建立数学模型分析边坡变形趋势,结合GTS软件模拟边坡位移动态以综合分析边坡稳定性。主要研究成果及工作如下:①对比分析基于激光测距监测技术与其他变形监测技术的优缺点,得到基于激光测距技术在公路边坡表面变形监测中更具优势。②归纳了公路边坡的分类、变形破坏影响因素以及破坏机理,对公路边坡变形破坏特征进行了系统的总结。利用边坡的基本信息结合日常检查分析边坡表面变形风险。③利用有限元软件GTS模拟边坡表面变形位移以及改进的强度折减法计算出不同折减系数对应模拟位移值,结合实际位移监测值进行对比分析。④根据变形监测数据建模分析预测变形趋势以及运用数值模拟分析了边坡安全系数并结合边坡工程的实际情况综合分析了边坡状态。研究结果表明,将边坡表面变形位移与有限元数值模拟分析方法相结合,可以根据位移值分析边坡动态,并结合数学模型分析变形趋势能很好的应用在边坡的稳定性分析中。
[Abstract]:With the continuous improvement of our country's infrastructure and the continuous development of highway traffic, a large number of slopes are inevitably produced in the process of high-grade highway, new highway and highway reconstruction. However, due to the influence of natural geological structure and artificial activities, slope instability is increasing day by day. How to monitor and analyze the slope stability, and finally predict the slope deformation trend and instability failure potential. Therefore, it is very important to reduce or avoid the casualties and economic losses caused by slope failure. The main research content of this paper is: laser ranging technology is used to monitor the displacement and deformation of slope surface. Based on the results of displacement monitoring, a mathematical model is established to analyze the trend of slope deformation. Combined with GTS software to simulate slope displacement dynamics to comprehensively analyze slope stability. The main research results and work are as follows: 1. The advantages and disadvantages of laser ranging monitoring technology and other deformation monitoring technology are compared and analyzed. Based on laser ranging technology in monitoring the surface deformation of highway slope, the classification of highway slope, the influence factors of deformation and failure and the failure mechanism are summarized. 2. The characteristics of deformation and failure of highway slope are systematically summarized. The risk of slope surface deformation is analyzed by using the basic information of slope combined with daily inspection. 3. 3. The finite element software GTS is used to simulate the surface deformation displacement of slope and its modification. The forward strength reduction method calculates different reduction coefficients corresponding to the simulated displacement values. Based on the data of deformation monitoring, the deformation trend is analyzed and the slope safety factor is analyzed by numerical simulation, and the edge is analyzed synthetically according to the actual situation of slope engineering. Slope state. The results show that. By combining the surface deformation of slope with the finite element numerical simulation method, the slope dynamics can be analyzed according to the displacement value, and the deformation trend can be well applied to the stability analysis of the slope combined with the mathematical model.
【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】：U416.14

【参考文献】