【作者】 崔宪丽；

【导师】 贺可强；

【作者基本信息】 青岛理工大学 ， 岩土工程， 2010， 硕士

【摘要】 堆积层滑坡是指发生在第四系及近代松散堆积层的一类滑坡,它包括一切土层滑坡、山区各类堆积物滑坡以及由构造、卸荷、风化等次生作用形成的各类松散破碎岩土体的滑坡,它分布广、规模大、突发性强、且危害性严重。为此,如何对该类滑坡进行有效防治具有深远的理论意义和巨大的经济效益。本文以国家自然科学基金项目“水诱发堆积层滑坡的加卸载响应比参数与位移动力学预测研究（项目编号:40672182）”和“堆积层滑坡位移矢量角动力学参数与位移多源信息综合预测（项目编号:40872184）”为依托,在对长江三峡库区龙王庙滑坡调查研究和对三峡库区堆积层边坡基本特征和滑坡发展变形的位移动力学特征系统分析研究的基础上,运用MIDAS/GTS和FLAC^3D国际知名岩土工程专业分析计算软件,进行了数值模拟分析与验证。本文主要研究情况如下:（1）本文针对目前堆积层滑坡治理还没有足够重视基岩面对坡体稳定性的影响的现状,通过协调坡面与基岩面两者之间关系及“正负地形理论”,提出了改变坡面形状（即坡形改造）以提高斜坡稳定性的边坡治理措施。（2）本文采用建模相对简单的MIDAS/GTS仿真模拟分析软件,以龙王庙滑坡为例,建立了滑坡体坡形改造的计算模型,采用在边坡稳定性分析中应用最为广泛且适宜于处理非线性大变形工程问题的FLAC^3D模拟软件进行数值模拟研究。研究过程综合考虑了坡体自重应力、水动力因素以及施工动荷载等影响因素。（3）本文在确定最优坡形改造设计方案过程中,分别采用了经验类比法和力学函数法进行研究分析,最终确定出最佳的边坡形状和边坡角的设计方案。最优坡形设计方案的提出综合考虑了多方面因素,提出了“体积不变”的原则。并将得出的最优坡形设计方案应用到后文的工况模拟设计中,通过模拟分析验证了坡形改造治理措施对边坡稳定性的影响。（4）本文针对龙王庙滑坡设计了5种不同工况的坡形改造方案,并对其进行模拟研究,通过分析不同方案对边坡其稳定性影响的关系规律,得出了龙王庙滑坡的最优坡形改造设计方案。最后以黄腊石滑坡为例对其进行了验证,验证结果进一步说明治理堆积层滑坡也可通过改变坡体形状来实现,坡形改造在治理滑坡工程中具有非常好的应用前景。更多还原

【Abstract】 Debris landslide, which includes all of the soil layer landslides, the accumulation landslides in mountainous district, and the loose accumulation landslides caused by constructing, unloading and weathering takes place in the Quaternary System and recent loose accumulation distributed. It has the characteristics of the broad distribution, the big scale, the strong burst and the serious destructiveness. Therefore, it will have a profound theoretical significance and vast economic profit to carry out the scientific prediction and control of this kind of landslides.Supported by the projects of National Natural Science Foundation of China-“Responding Ratio Parameter to loading & unloading and Displacement Dynamic Prediction of the Debris Landslides”（Code No: 40672182） and“Dynamic Parameter to Displacement vector angle and Displacement Integrated forecast in polyphyletic information of the Debris Landslides”（Code No: 40872184）, and based on the fieldwork for the Three Gorges region and the system analysis on the basic feature and the displacement dynamic features of Longwangmiao landslide, the numerical simulation is carried on the Longwangmiao landslide by the famous geotechnical engineering analysis software Midas/GTS and FLAC3D. This article mainly the following circumstances :（1）This article is currently not colluvial landslide enough attention to the face of rock slope stability of the status quo, through the coordination of the slope and the relationship between the bedrock surface and the "theory of positive and negative terrain," presented change the slope shape （ie slope shape transformation） to improve the slope stability of the slope treatment measures.（2） In this paper, modeling of relatively simple MIDAS / GTS simulation analysis software to Longwangmiao landslide as an example, the establishment of a landslide slope shape transformation model, the slope stability analysis using the most widely used and suitable for projects dealing with the problem of nonlinear large deformation simulation software FLAC^3D numerical simulation. Considering the course of the study slope gravity stress, hydrodynamic factors, and influencing factors such as construction of dynamic load.（3） In this paper, the optimal design of slope shape transformation process, has adopted the mechanical analogy and experience research and analysis function, and ultimately to determine the best shape and slope angle of slope design. Optimal shape design of the proposed slope took into account various factors, proposed the "constant volume" principle. And draw the best slope shape design applied to simulate the working conditions later in the design, simulation analysis is verified by slope shape transformation of governance measures on slope stability.（4） This slide is designed for Longwangmiao 5 different conditions of slope shape rehabilitation programs, and its simulation study, by analyzing the different options on the slope of the relationship between the stability of law, obtained a landslide Longwangmiao Optimal design of slope shape reconstruction. Finally, an example Huanglashi landslide was carried out verification, verify that the results of further accumulation of Debris landslide control can also be changed to achieve the shape of the slope, slope shape modification in Landslide Engineering has a very good prospect of application.更多还原