高填方路堤破坏成因及处治分析

发布时间：2018-01-12 00:26

本文关键词：高填方路堤破坏成因及处治分析　出处：《河南工业大学》2014年硕士论文　论文类型：学位论文

【摘要】：近年来，由于全球地质运动及极端气候条件的影响，我国发生的滑坡及边坡破坏较多，造成了较大的人员伤亡与财产损失。目前边坡及滑坡分析及处治的方法较多，通过对济邵高速K280段抢险工程进行分析，，对各种稳定性方法计算安全系数、确定滑动面所在的位置和形状等进行了对比，并对抗滑桩处治中的一些规律做出了总结。主要工作有：首先，通过对滑坡地段的工程勘察、稳定性监测、理论计算、有限元分析等手段，分析济邵高速K280段路面及边坡破坏的原因及滑坡变形发展的现状，比较各种方法分析过程及所得结论的异同，分析其中的原因，比较各种方法的优缺点。通过工程勘察与滑坡稳定性监测工作采集数据并对结果进行分析整理，初步确定了济邵高速K280破坏原因。高边坡自身由于受到降水影响，抗剪强度值降低，边坡安全系数较低，稳定性不足，路基出现了不均匀沉降，高速公路整体沿路堤与原地面交界处产生滑动。其次，通过理论计算，描述了边坡的高度、边坡坡度、土体抗剪强度指标等取值对于边坡稳定性的影响，考虑不同安全系数的定义对于滑坡推力计算的影响。对比极限平衡法中的瑞典法、Bishop法和Janbu法等计算方法所得到结果的差异，分析出现差异的原因以及影响计算结果的因素，并采用极限平衡法对济邵高速进行计算分析，验证了工程勘察和监测工作的结论。通过有限元分析计算，进一步验证了济邵高速K280段滑动面位于填方路基和原地面的交界处以及高边坡自身稳定性存在不足的结论。最后，简单介绍了目前常用的加固边坡和处理滑坡的常用措施，对济邵高速K280段抢险方案进行评价。通过理论计算，对抗滑桩桩间距变化以及端头是否施加预应力锚索而引起的桩身的弯矩、剪力、桩顶的位移值及土反力的变化规律做了总结。通过有限元计算，进一步印证理论计算的结果，比较计算结果的差异以及对出现的原因进行了分析。
[Abstract]:In recent years, due to the influence of global geological movement and extreme climatic conditions, more landslides and slope damage occurred in China. At present, there are many methods to analyze and treat the slope and landslide. Through the analysis of the rescue project of Ji-Shao High-speed K280 Section, the safety factor is calculated by various stability methods. The position and shape of the sliding surface are compared, and some rules in the treatment of the anti-slide pile are summarized. The main work is as follows: Firstly, by means of engineering investigation, stability monitoring, theoretical calculation, finite element analysis and so on, the causes of pavement and slope failure and the present situation of landslide deformation are analyzed. This paper compares the analysis process of various methods and the similarities and differences of the conclusions, analyzes the causes, compares the advantages and disadvantages of the various methods, and analyzes and collates the results through engineering investigation and landslide stability monitoring. The reason for the failure of Ji-Shao high-speed K280 is preliminarily determined. Due to the influence of precipitation, the shear strength of the high slope decreases, the slope safety coefficient is low, the stability is insufficient, and the subgrade is unevenly settled. The whole expressway along the embankment and the original ground to produce a slip at the junction. Secondly, the influence of slope height, slope gradient and soil shear strength on slope stability is described by theoretical calculation. Considering the influence of different definitions of safety factor on the calculation of landslide thrust, the difference between the results obtained by the Swedish method Bishop method and the Janbu method is compared in the limit equilibrium method. This paper analyzes the causes of the difference and the factors influencing the calculation results, and uses the limit equilibrium method to calculate and analyze the Ji-Shao High Speed, which verifies the conclusion of the engineering investigation and monitoring work, and calculates by the finite element analysis. The conclusion that the sliding surface of Ji-Shao high-speed K280 section is located at the junction between the embankment and the original ground and the stability of the high slope itself is proved to be insufficient. Finally, the paper briefly introduces the commonly used measures of slope reinforcement and landslide treatment, and evaluates the rescue plan of Ji-Shao High-speed K280 Section. The theoretical calculation is carried out. In this paper, the variation of pile bending moment, shear force, displacement value of pile top and soil reaction force caused by the change of pile spacing and whether the end head is subjected to prestressed anchor cable is summarized. The finite element method is used to calculate the bending moment, shear force, displacement value of pile top and soil reaction force. The results of theoretical calculation are further confirmed, the differences of calculation results are compared and the causes of occurrence are analyzed.
【学位授予单位】：河南工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U418.5

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