反倾岩质边坡的变形破坏分析及其支护技术研究

发布时间：2018-01-26 13:44

本文关键词： 反倾岩质边坡破坏机理预应力锚杆（索）锚索框架　出处：《西安科技大学》2014年硕士论文　论文类型：学位论文

【摘要】：边坡的防护与治理是岩土工程中比较常见的技术问题，涉及到国防、公路、铁路、水利、工民建和市政等各个领域。以往对边坡的研究主要是针对顺层边坡，，而对反倾边坡的岩移机理和滑坡模式研究较少。反倾边坡是指具有反倾结构面（即边坡的倾向与结构面的倾向相反）的边坡。反倾结构面的存在及其特征对于边坡的变形和破坏方式具有决定性的控制作用。因此研究反倾边坡具有非常重要的理论和实际意义。论文以某公路边坡为分析课题，系统的研究了反倾岩质边坡的变形破坏规律，提出了一个较为合理的反倾岩质边坡稳定性分析方法及支护技术。主要研究内容及结论有：（1）系统研究影响反倾岩质边坡稳定性的主要因素，采用迈达斯GTS分析了这些因素对反倾岩质边坡稳定性的影响程度；（2）根据反倾岩质边坡稳定性的影响因素分析反倾岩质边坡的破坏类型，认为反倾岩质边坡的破坏主要是倾覆破坏和剪切滑移破坏；（3）建立不同破坏模式下反倾岩质边坡破坏的力学模型，采用经典力学理论对反倾岩质边坡的破坏机理进行分析，认为反倾岩质边坡的破坏机理主要是“悬臂叠合梁”的倾倒，反倾岩质边坡具有结构承载调整—结构强度弱化—结构失稳的变形破坏规律。（4）根据反倾岩质边坡的力学分析结果，开展反倾岩质边坡的支护技术研究，提出采用预应力锚索（杆）框架来对反倾岩质边坡进行加固的处理措施；（5）以某公路边坡为工程实例，介绍反倾岩质边坡的监测技术，并对该反倾岩质边坡进行加固处理和稳定性评价。
[Abstract]:Slope protection and treatment is a common technical problem in geotechnical engineering, involving national defense, highway, railway, water conservancy, civil construction and municipal. However, there are few studies on the mechanism of rock movement and landslide model of reverse slope, which refers to the slope with reverse inclined structural plane (that is, the inclination of slope is opposite to that of structural plane). The existence and characteristics of the reverse inclined structural surface play a decisive role in controlling the deformation and failure mode of the slope, so it is of great theoretical and practical significance to study the reverse slope. In this paper, a highway slope is taken as the analysis subject, and the law of deformation and failure of anti-dip rock slope is studied systematically. In this paper, a reasonable method of stability analysis and supporting technology of anti-dip rock slope is put forward. The main research contents and conclusions are as follows: 1) the main factors affecting the stability of anti-dip rock slope are systematically studied, and the influence degree of these factors on the stability of anti-dip rock slope is analyzed by Midas GTS. (2) based on the analysis of the factors affecting the stability of the backdip rock slope, the failure types of the backdip rock slope are analyzed, and it is considered that the failure of the reverse dip rock slope is mainly caused by overturning failure and shear-slip failure; 3) to establish the mechanics model of reverse dip rock slope failure under different failure modes, and to analyze the failure mechanism of reverse dip rock slope by classical mechanics theory. It is considered that the failure mechanism of backdip rock slope is mainly the toppling of cantilever composite beam, and the reverse dip rock slope has the deformation and failure law of structural load-bearing adjustment, structural strength weakening and structural instability. (4) according to the results of mechanical analysis, the supporting technology of anti-dipping rock slope is studied, and the treatment measures of reinforcement of anti-dipping rock slope with prestressed anchor cable (rod) frame are put forward. Taking a highway slope as an engineering example, this paper introduces the monitoring technology of the anti-dip rock slope, and carries on the reinforcement treatment and the stability evaluation to the anti-dip rock slope.
【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U418.52

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