黄陵一矿边坡稳定性分析及预应力锚索框架梁加固效果模拟

发布时间：2018-08-29 15:51

【摘要】：随着我国基础建设的飞速发展,高速公路、房屋建筑、矿产开发等工程建设中出现的人工边坡越来越多,由此造成的边坡灾害也日益增多,因此,如何更加高效、合理的对边坡进行加固治理具有重要的理论实践意义。预应力锚索框架梁作为一种新兴的边坡加固技术,已在工程实践中被大量应用推广,然而其实际应用超前于理论研究,在生产实践中仍存在不少问题,因此对该技术的理论研究具有十分重要的意义。本文以黄陵一号矿四号风井边坡为研究对象,采用传统分析和数值模拟两种方法,对边坡进行了稳定性计算评价,通过模糊综合评判得出最优加固方案,并在有限元软件中对其加固效果进行模拟预测,主要得到以下结论:(1)采用极限平衡法与有限元强度折减法,分别计算黄陵一号矿四号风井边坡稳定性,得出如下评价:在天然工况边坡处于欠稳定状态,暴雨工况处于失稳状态,该边坡需加固治理。(2)比较当前边坡加固各种措施的优缺点及适用条件,运用模糊数学多目标模糊决策法优选出黄陵一号矿四号风井边坡加固最合理方案:预应力锚索框架梁加固措施。(3)在有限元软件GTS NX中对加固设计方案进行建模,模拟得出预应力锚索框架梁加固后边坡应力。应变及塑性区分布云图,计算得出天然工况与暴雨工况下黄陵一号矿四号风井边坡稳定性系数分别为1.382、1.165,达到边坡等级设计安全系数,验证了加固方案合理。
[Abstract]:With the rapid development of our country's infrastructure, more and more artificial slopes appear in the construction of highway, house building, mineral development and other projects, and the resulting slope disasters are also increasing day by day. Therefore, how to be more efficient, It is of great theoretical and practical significance to reinforce and treat the slope reasonably. As a new slope reinforcement technology, prestressed anchor cable frame beam has been widely used in engineering practice. However, its practical application is ahead of theoretical research, and there are still many problems in production practice. Therefore, the theoretical study of this technology is of great significance. In this paper, the slope of No. 4 wind shaft in Huangling No. 1 Mine is taken as the research object. The stability of the slope is calculated and evaluated by traditional analysis and numerical simulation, and the optimal reinforcement scheme is obtained by fuzzy comprehensive evaluation. The results are as follows: (1) the slope stability of No. 4 wind shaft in Huangling No. 1 Mine is calculated by using limit equilibrium method and finite element strength reduction method, respectively. The evaluation results are as follows: the slope is in an unstable state under natural conditions, and the torrential rain condition is in a state of instability. (2) compare the advantages and disadvantages and applicable conditions of various measures of slope reinforcement at present. By using fuzzy mathematics multi-objective fuzzy decision method, the most reasonable scheme for slope reinforcement of No. 4 wind shaft in Huangling No. 1 Mine is selected: reinforcement measures of prestressed anchor cable frame beam. (3) the reinforcement design scheme is modeled in finite element software GTS NX. The slope stress after reinforcement with prestressed anchor cable frame beam is obtained by simulation. According to the distribution of strain and plastic area, the slope stability coefficient of No. 4 wind well in Huangling No. 1 Mine under natural and rainstorm conditions is 1.382 ~ 1.165, respectively. The safety factor of slope grade design is reached, and the reinforcement scheme is proved to be reasonable.
【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD824.7

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