【摘要】：隨著我國(guó)城市、交通、礦山、環(huán)保等行業(yè)的高速發(fā)展，滑坡治理成為一項(xiàng)越來(lái)越重要的工程。抗滑樁作為滑坡地質(zhì)災(zāi)害治理中的一種主要方法，在工程中被廣泛推廣應(yīng)用。而嵌固深度是抗滑樁設(shè)計(jì)的重要指標(biāo)之一，直接影響抗滑工程的抗滑效果，對(duì)抗滑樁嵌固深度的研究顯得尤為重要。 本文主要通過(guò)理論分析和FLAC3D數(shù)值模擬相聯(lián)系的研究方法，再結(jié)合實(shí)際工程，對(duì)抗滑樁嵌固深度進(jìn)行了研究，主要研究工作如下： ①分析了抗滑樁的失效機(jī)理及失效形態(tài)，通過(guò)對(duì)抗滑樁樁頂位移計(jì)算公式的推導(dǎo)及理論分析，提出了確定樁頂允許變形的方法，并對(duì)抗滑樁樁頂允許變形進(jìn)行了理論分析，最后通過(guò)工程實(shí)例，驗(yàn)證了確定樁頂允許變形方法的合理性。 ②分析了抗滑樁嵌固段樁前巖體的破壞模式，考慮滑動(dòng)楔體的自重作用，詳細(xì)推導(dǎo)了襟邊深度的計(jì)算公式，通過(guò)算例，對(duì)襟邊深度的影響因素進(jìn)行了分析。 ③以有限差分理論為基礎(chǔ)，通過(guò)FLAC3D軟件對(duì)抗滑樁及樁前嵌固段巖體的位移和應(yīng)力進(jìn)行分析，結(jié)合數(shù)值模擬的計(jì)算結(jié)果，對(duì)抗滑樁嵌固深度的影響因素進(jìn)行分析，最后通過(guò)工程實(shí)例，選取典型剖面，采用FLAC3D軟件對(duì)實(shí)際滑坡體進(jìn)行模擬計(jì)算。依據(jù)襟邊深度的計(jì)算公式，同時(shí)考慮樁頂允許變形的控制要求，對(duì)工程實(shí)例的嵌固深度進(jìn)行計(jì)算確定，，對(duì)抗滑樁的工程設(shè)計(jì)有一定的指導(dǎo)意義。
[Abstract]:With the rapid development of cities, transportation, mines, environmental protection and other industries in China, landslide control has become a more and more important project. As a main method in the treatment of landslide geological disasters, anti-slide pile has been widely used in engineering. The embedded depth is one of the important indexes in the design of anti-slide pile, which directly affects the anti-slide effect of anti-slide engineering, and the research on the embedded depth of anti-slide pile is particularly important. In this paper, the embedded depth of anti-slide pile is studied by means of theoretical analysis and FLAC3D numerical simulation, combined with practical engineering, the main research work is as follows: 1 the failure mechanism and failure form of anti-slide pile are analyzed. Based on the derivation and theoretical analysis of the formula for calculating the displacement of the top of the slide pile, the method of determining the allowable deformation of the top of the pile is put forward, and the allowable deformation of the top of the pile is analyzed theoretically. Finally, an engineering example is given. The rationality of the method for determining the allowable deformation of pile top is verified. (2) the failure mode of rock mass in front of pile in embedded section of anti-slide pile is analyzed, and the calculation formula of flap depth is deduced in detail considering the self-weight action of sliding wedge. through an example, the influencing factors of flap depth are analyzed. (3) based on the finite difference theory, the displacement and stress of rock mass in sliding pile and embedded section in front of pile are analyzed by FLAC3D software. Combined with the calculation results of numerical simulation, the influencing factors of embedded depth of anti-slide pile are analyzed. Finally, through an engineering example, the typical section is selected, and the actual landslide body is simulated and calculated by FLAC3D software. According to the calculation formula of flap depth and considering the control requirements of allowable deformation of pile top, the embedded depth of engineering example is calculated and determined, and the engineering design of anti-slide pile has certain guiding significance.
【學(xué)位授予單位】：重慶交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TU473.1

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