【作者】 孙柬；

【导师】 莫海鸿；

【作者基本信息】 华南理工大学 ， 岩土工程， 2011， 硕士

【摘要】 抗滑桩作为一种有效的工程措施,在边坡加固工程、滑坡地质灾害防治中得到了广泛应用。但是,抗滑桩的设计仍然存在诸多问题,结果还存在一些不确定性,关于抗滑桩的工作机理、桩-土相互作用规律等问题并没有很好地解决,其设计理论与计算方法,还处于半经验半理论的不成熟阶段,尤其是双排抗滑桩的设计,更加显得不成熟。对于本文所研究的高低双排抗滑桩,目前涉及的研究甚少,明显落后于工程实践。本文的主要研究内容如下:1.归纳整理了现有双排抗滑桩支护结构体系的国内外研究成果,并对其计算理论进行了比较与分析,提出该领域尚待研究的问题,为本文的研究思路及方法提供有益的借鉴。2.简要介绍了抗滑桩的类型和计算方法,特别是有限元求解法的运用。然后,总结了有限元法分析计算双排抗滑桩支护结构体系的基本理论,以及有限元程序MIDAS-GTS对双排抗滑桩支护结构体系的分析方法,它可以通过考虑土体非线性、桩土接触、并可模拟施工过程的影响等,来确保计算结果的精度和质量。3.运用MIDAS-GTS有限元软件建立高低双排抗滑桩支护结构的有限元模型,进行支护结构受力影响因素的分析,包括前后桩桩顶连接方式、边坡填土高度、前后桩排距、前桩桩长和截面等因素。通过对结果的分析,得出了一系列重要结论。4.最后,采用本文所述的方法,分析了一个滑坡治理工程实例,评价该方法合理性和适用型,从而为高低双排抗滑桩支护结构在其它边坡加固和治理工程中的应用与推广提供了有益的参考。更多还原

【Abstract】 As a kind of enginnering measure, anti-slide pile has obtained widely application in slope reinforcement engineering and treatment of landslide geological disasters. However, the design of piles still exist many problems, and the result of the design still has some uncertainties. There are many problems such as the mechanics of anti-slide pile and the interaction effect between pile and soil need to be sloved. The design of anti-slide piles has to depend on the experience of the engineerers, especially the design of double-row piles is more immature. And the research of high-low double-row piles is few, which fall behind the practice.The mail research contents are as follows:1.This article summarizes the existing domestic and foreign research results of the retaining structure of double-row anti-slide piles, and several currently used calculation methods are compared and analyzed. Raise questions that need further study in this field, providing the beneficial reference for this study.2.Briefly introduces the types and calculation method of the anti-slide piles, especially the use of finite element method. Than, summarize the basic theory of using finite element analysis of double-row piles supporting structure and the finite element program MIDAS-GTS, which can be considered non-linear soil, pile-soil contact, and can simulate the impact of the construction process to ensure the accuracy and quality of results.3.3D computation model of high-low double-row anti-slide piles structure is built through MIDAS-GTS for researching.and analyzing the mechanics influencing factors of the high-low double-row anti-slide piles. Such as pile-tip connection method,Slope filling height,the distance between two rows, the length and section of Former pile,and other factors. Through the comparison of the analysis result,some reference results are summarized.4.Finally,using the method described in this paper, a landslide project is analyzed. The rationality and applicability of the model in this project are validated. Thus, the high-low double-row anti-slide piles is worthy of promotion and extensive application in Slope reinforcement and treatment engineering.更多还原