抗滑桩嵌固深度的研究
发布时间：2019-06-01 17:20
【摘要】：随着我国城市、交通、矿山、环保等行业的高速发展，滑坡治理成为一项越来越重要的工程。抗滑桩作为滑坡地质灾害治理中的一种主要方法，在工程中被广泛推广应用。而嵌固深度是抗滑桩设计的重要指标之一，直接影响抗滑工程的抗滑效果，对抗滑桩嵌固深度的研究显得尤为重要。 本文主要通过理论分析和FLAC3D数值模拟相联系的研究方法，再结合实际工程，对抗滑桩嵌固深度进行了研究，主要研究工作如下： ①分析了抗滑桩的失效机理及失效形态，通过对抗滑桩桩顶位移计算公式的推导及理论分析，提出了确定桩顶允许变形的方法，并对抗滑桩桩顶允许变形进行了理论分析，最后通过工程实例，验证了确定桩顶允许变形方法的合理性。 ②分析了抗滑桩嵌固段桩前岩体的破坏模式，考虑滑动楔体的自重作用，详细推导了襟边深度的计算公式，通过算例，对襟边深度的影响因素进行了分析。 ③以有限差分理论为基础，通过FLAC3D软件对抗滑桩及桩前嵌固段岩体的位移和应力进行分析，结合数值模拟的计算结果，对抗滑桩嵌固深度的影响因素进行分析，最后通过工程实例，选取典型剖面，采用FLAC3D软件对实际滑坡体进行模拟计算。依据襟边深度的计算公式，同时考虑桩顶允许变形的控制要求，对工程实例的嵌固深度进行计算确定，，对抗滑桩的工程设计有一定的指导意义。
[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.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU473.1
本文编号：2490449
[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.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU473.1
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