地震荷載作用下抗滑樁加固邊坡動力穩(wěn)定性分析
[Abstract]:Slope engineering is an important project related to the safety and security of human beings. The disasters caused by slope instability bring huge losses to human each year, so slope stability research has become an important subject in the field of geotechnical engineering. Earthquake is an important factor causing slope instability. Anti-slide pile, as an effective reinforcement measure, has been widely used in slope engineering. However, the research of anti-slide pile on the effect of anti-slide pile on slope seismic reinforcement has just begun, so it is necessary to carry out in-depth research. In this paper, a generalized soil slope model is used to study the influence of reinforcement parameters of anti-slide pile on the dynamic response and stability of the slope. FLAC3D is used to simulate the slope response under various seismic conditions. It provides reference for theoretical research and engineering practice. The main work of this paper is as follows: through the comparative analysis of slope dynamic response under different amplitude, different time, different frequency of earthquake, from the displacement, strain, The effects of three important ground motion parameters, amplitude and frequency on slope dynamic response are discussed in four aspects of acceleration and velocity, and the dynamic response law of slope under various earthquake conditions is summarized. The influence of pile parameters (pile length, pile position, pile spacing) on the dynamic response of slope supported by anti-slide pile under different seismic conditions is studied. Acceleration and speed show the influence of different anti-slide pile reinforcement methods on the reinforcement effect. This paper describes the basic principle of the strength reduction method, discusses the judging method of slope instability, and puts forward the judging flow of slope instability state in this paper. The dynamic stability coefficient calculated by strength reduction method and instability determination method is verified by pseudostatic method based on Bishop (Bishop), and the slope dynamic stability coefficient of different pile length and pile position anti-slide pile reinforcement method is obtained by using this method. Compared with the unreinforced slope, the reinforcement effect of anti-slide pile under seismic condition was evaluated according to the dynamic stability factor.
【學(xué)位授予單位】:西南交通大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2017
【分類號】:TU753
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