永仁县民族中学滑坡治理方案及数值模拟研究

发布时间：2018-04-09 05:17

本文选题：滑坡　切入点：稳定性　出处：《中国地质大学(北京)》2017年硕士论文

【摘要】：本文依托云南永仁县民族中学滑坡治理项目,通过勘察、试验、数值模拟以及变形监测等多种手段,对民族中学滑坡特征、稳定性以及治理方案进行了研究,对滑坡治理中抗滑桩加固机理进行了探讨,主要研究工作和成果如下:1、基于永仁县民族中学滑坡勘查成果,阐述了滑坡地区的自然地质条件、滑坡的形态、规模、结构和变形破坏等特征。利用极限平衡理论,对滑坡三个典型剖面在三种工况下的稳定性进行了分析计算,计算结果表明,滑坡稳定系数都在1.0以下,滑坡处于欠稳定和不稳定状态。2、根据滑坡稳定状态,结合其危害对象的重要性及其分布特征,汲取类似滑坡成功治理经验,拟定2个治理工程方案。通过对治理效果、治理工程量、施工难度及对周围环境影响等方面的分析比较,提出了最佳治理方案,即抗滑桩+挡土墙综合治理方案。通过对抗滑桩加固后的滑坡进行位移监测,各个监测点在监测期间未发生明显水平位移和垂直位移,构筑物垂直方向处于相对稳定状态,采用抗滑桩的加固效果明显。3、运用ABAQUS有限元软件,采用强度折减法对滑坡治理中抗滑桩加固作用进行了数值模拟分析,得到了抗滑桩的应力和应变云图、时间-位移关系曲线等,计算值与现场监测数据进行对比分析较吻合,验证了抗滑桩治理滑坡的有效性和可靠性。
[Abstract]:Based on the landslide control project in Yongren County, Yunnan Province, this paper studies the landslide characteristics, stability and treatment scheme of the middle school by means of survey, test, numerical simulation and deformation monitoring.In this paper, the mechanism of anti-slide pile reinforcement in landslide control is discussed. The main research work and results are as follows: 1. Based on the landslide exploration results of Yongren ethnic middle school, the natural geological conditions, the shape and scale of landslide in landslide area are expounded.Structural and deformation-failure characteristics.Based on the limit equilibrium theory, the stability of three typical sections of landslide under three working conditions is analyzed and calculated. The results show that the stability coefficient of landslide is below 1.0.The landslide is in the unstable and unstable state. According to the stable state of the landslide and the importance and distribution characteristics of the hazard object, two treatment projects are drawn up according to the successful treatment experience of the similar landslide.Based on the analysis and comparison of the effect of treatment, the quantity of construction, the difficulty of construction and the influence on the surrounding environment, the best treatment scheme is put forward, that is, the comprehensive treatment scheme of anti-slide pile retaining wall.Through monitoring the displacement of the landslide strengthened by anti-slide pile, no obvious horizontal displacement and vertical displacement occurred in each monitoring point during the monitoring period, and the vertical direction of the structure was relatively stable.The reinforcement effect of anti-slide pile is obvious by using ABAQUS finite element software and the strength reduction method is used to simulate and analyze the strengthening effect of anti-slide pile in landslide treatment, and the stress and strain cloud diagram of anti-slide pile is obtained.The time-displacement relation curve is in good agreement with the field monitoring data, which verifies the effectiveness and reliability of anti-slide pile in landslide control.
【学位授予单位】：中国地质大学(北京)
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P642.22

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