云南某矿山粗碎站边坡稳定性分析与治理措施研究

发布时间：2018-02-28 19:55

本文关键词： 边坡稳定性分析抗滑桩极限平衡计算土拱效应数值模拟　出处：《昆明理工大学》2013年硕士论文　论文类型：学位论文

【摘要】：随着我国人口的高速增长和城镇建设的飞速发展,作为不可再生资源的土地资源越来越难以满足人们对生活生产的需求。如何在防止滑坡灾害的基础上充分利用有限的土地资源成为现代社会不可忽视的现实问题,而抗滑桩本身具有的抗滑能力强、适用范围广、施工安全简便、速度快、工程量小、投资少、不会进一步恶化滑坡环境且能有效核实地质条件并及时调整设计方案等优点使其越来越受到岩土工程界的广泛关注。本论文以云南华联锌铟公司曼家寨采场粗碎站边坡稳定性及支护措施研究课题为背景,结合前人在边坡工程中所得的研究成果,列举了一些人们在研究边坡工程过程中常用到的一些边坡稳定性分析方法以及抗滑桩支护加固边坡和土拱理论的研究现状。在论文中,运用了边坡稳定性分析中的极限平衡分析法对研究对象进行稳定性评价并根据计算结果提出了具体的边坡加固治理措施。在探讨抗滑桩设计参数对抗滑桩土拱效应的影响时选用了数值模拟方法(FLAC3D法)。本论文的主要内容可总结为以下四个方面： 1、简单介绍了边坡工程中主要边坡稳定分析方法的发展史以及一些国内外研究现状,抗滑桩支护研究的历史、现状和存在的问题以及关于土拱理论的一些研究现状。 2、介绍了该论文研究课题的工程背景及主要地质条件,包括工程地质条件、气象及水文地质条件、不良地质作用及地震效应。同时详细介绍了该边坡的工程概况。 3、介绍了桩土相互作用机理—土拱效应,通过根据边坡实际情况建立的FLAC3D数值分析模型,分析研究抗滑桩加固边坡时改变其桩间距和桩截面尺寸对抗滑桩土拱效应产生的影响,通过对比发现了当改变这两方面参数时抗滑桩支护效果随之发生的一系列改变并据此总结出变化规律,得到了对实际工程有益的结论。 4、通过选用理正软件进行边坡的极限平衡计算,论证了对边坡进行支护加固的必要性,同时确定抗滑桩作为支护手段。通过试算确定了抗滑桩的位置,桩长以及桩的截面尺寸,之后在土拱效应的基础上得出了抗滑桩最大桩间距的计算公式。
[Abstract]:With the rapid growth of population and the rapid development of urban construction, Land resources, as non-renewable resources, are becoming more and more difficult to meet the needs of daily life. How to make full use of limited land resources on the basis of landslide prevention has become a realistic problem that can not be ignored in modern society. However, the anti-slide pile has the advantages of strong anti-slide ability, wide range of application, simple and safe construction, high speed, small amount of engineering and less investment. The advantages of not further deterioration of landslide environment and effective verification of geological conditions and timely adjustment of design plan make it more and more concerned by geotechnical engineering circles. This paper takes the research subject of slope stability and supporting measures of Manjiazhai stope of Yunnan Hualian Zinc-indium Company as the background, combined with the research results obtained by predecessors in slope engineering. This paper enumerates some methods of slope stability analysis that are often used in the research of slope engineering, as well as the research status of anti-slide pile supporting and strengthening slope and soil arch theory. The limit equilibrium analysis method in slope stability analysis is used to evaluate the stability of the research object. According to the calculation results, concrete measures of slope reinforcement and treatment are put forward. The design parameters of anti-slide pile are discussed to resist the soil arch effect of slide pile. The FLAC3D method is used to simulate the effect of the method. The main contents of this paper can be summarized as follows:. 1. The development history of main slope stability analysis methods in slope engineering, the research status at home and abroad, the history, status quo and existing problems of anti-slide pile support, and the research status of soil arch theory are briefly introduced. 2. The engineering background and main geological conditions, including engineering geological conditions, meteorological and hydrogeological conditions, adverse geological effects and seismic effects, are introduced, and the engineering situation of the slope is introduced in detail. 3. The pile-soil interaction mechanism, soil arch effect, is introduced. Through the FLAC3D numerical analysis model established according to the actual condition of the slope, the influence of changing the pile spacing and the pile cross-section size to resist the soil arch effect of sliding pile is analyzed and studied. A series of changes in the support effect of anti-slide pile are found when the two parameters are changed and the law of change is summed up, and the beneficial conclusions for practical engineering are obtained. 4. The necessity of supporting and strengthening the slope is demonstrated through the calculation of the limit equilibrium of the slope with the help of the leveling software, and the anti-slide pile is determined as the supporting means. The position, length and section size of the anti-slide pile are determined by trial calculation. On the basis of soil arch effect, the formula for calculating the maximum pile spacing of anti-slide pile is obtained.
【学位授予单位】：昆明理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：P642.2;TU753.8

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