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题名	地震荷载下碎石土滑坡抗滑桩的受力特性和嵌固深度研究
作者	孙峰
学位类别	博士
答辩日期	2012-05-31
授予单位	中国科学院研究生院
授予地点	北京
导师	孔纪名
关键词	地震荷载 碎石土滑坡 抗滑桩 受力特性 嵌固深度
学位专业	岩土工程
中文摘要	我国是滑坡灾害严重的国家，碎石土滑坡是一种常见的滑坡类型。在滑坡灾害的防治中，抗滑桩是一种主要的灾害防治形式。由于不同碎石土滑坡岩土的强度差异，碎石土滑坡防治中抗滑桩的嵌固深度是防治设计的关键问题。就目前的抗滑桩设计标准而言，嵌固深度还是一种经验设计，抗滑桩嵌固深度设计的理论问题还没有解决。同时，我国强震分布广。汶川地震等大型地震（及其余震）往往造成抗滑桩支护结构遭到不同程度的破坏。因此，抗滑桩在地震作用下的动力响应和抗震稳定问题是岩土地震工程中研究的焦点问题之一。目前，在地震作用下的抗滑桩受力特性和嵌固深度的研究基本还处于空白，若能在震前经济、合理地确定抗滑桩嵌固深度，并以此进行抗滑桩的抗震设计，将会增强其抗震性能和大大节约工程投资。论文研究通过野外调查，选取典型的公路滑坡抗滑桩工程为典型对象，建立地震荷载下碎石土滑坡抗滑桩的受力特性的地质力学模型，通过建立地质力学试验模型和物理试验模型，进行地震荷载下碎石土滑坡抗滑桩的受力特性和不同嵌固深度的物理模拟试验，获得试验数据，分析抗滑桩受力特性和嵌固深度对地震作用的动力响应特点。同时，选用大型有限元软件ANSYS进行数值模拟分析，并对两种方法的结果进行对比分析，研究地震荷载下碎石土滑坡抗滑桩的受力特性和嵌固深度问题，建立了地震作用下不同类型碎石土滑坡抗滑桩嵌固深度的经验判别式和计算模型，并运用理论解析得出的计算模型进行应用和验证。通过本文研究为碎石土滑坡的抗震加固分析及抗震设计提供借鉴和参考。
英文摘要	Landslide hazards is serious in China, with mostly debris soil. anti-sliding pile isa major form of disaster prevention. Due to the debris landslide of the different strength for the rock and soil, anti-sliding piles of debris landslide for the embedded depth control design, that is the key issue. As far as the current design standards for anti-sliding piles, the embedded depth is the experience design, design theory of anti-sliding piles for the embedded depth has not been solved. At the same time, strong earthquakes is wide distribution in China. The large earthquakes such as Wenchuan earthquake (include aftershocks) that often result in anti-sliding pile for the retaining structures, that it is subjected to varying degrees of damage. Therefore, anti-sliding piles for the earthquake dynamic response and seismic stability is one of the focal issues in geotechnical earthquake engineering. At present, the anti-sliding piles in seismic stress characteristics and study on the embedded depth that is blank, if the economy, reasonably to determine the embedded depth of anti-slide piles before the quake, it will be enhanced its seismic performance and greatly reduce engineering investment. The papers foe the research that is by the field investigation, and it select the typical of Highway landslide for the anti-sliding pile engineering that is for the typical object, and it established earthquake load of the debris landslide for the anti-sliding pile, that is the force characteristics of geomechanical model, and by established geomechanical test model and physical test model, earthquake load of debris landslide for the anti-sliding pile that the force characteristics and the different embedded depth of physical simulation test, to get test data, analysis on anti-sliding pile stress characteristics and dynamic response and the embedded depth of the earthquake. At the same time, it selects the large numerical simulation of finite element software for ANSYS, to analysis and comparative the results of the two methods, that reasearch on the characteristic of the stress and embedded depth of the anti-slide piles reinforced in the debris landslide subjected to earthquake load, that it establishes the different types of gravel soil under the earthquake of the embedded depth for the empirical formula and calculation models, and theoretical analysis that calculation the model for the application and validation. In order to provide seismic reinforcement of debris landslide and earthquake resistant design for reference.
语种	中文
公开日期	2013-01-14
内容类型	学位论文
源URL	[http://192.168.143.20:8080/handle/131551/4804]
专题	成都山地灾害与环境研究所_山地灾害与地表过程重点实验室
推荐引用方式 GB/T 7714	孙峰. 地震荷载下碎石土滑坡抗滑桩的受力特性和嵌固深度研究[D]. 北京. 中国科学院研究生院. 2012.

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