新岩滑坡成因机制及抗滑桩桩土效应研究

发布时间：2019-01-07 09:03

【摘要】：新岩滑坡是汪延一级公路新岩路段高填方路堤滑坡，，由于滑坡岩土体具有膨胀性，属于膨胀性软岩滑坡。由于对滑坡成因机制研究不足，多年来经过多次治理，至今仍无法根治，严重威胁汪延高速公路的正常通车和安全运营。论文根据新岩滑坡工程地质条件和滑体特征，研究分析新岩滑坡成因机制和治理设计，并利用二维模型反演模拟新岩滑坡形成过程，针对抗滑桩土拱效应，建立新岩滑坡整体三维模型，研究桩截面形式和双排桩布置方式对桩间土拱效应的影响，优化抗滑桩设计。论文共分八章，第1章为绪论，介绍了选题依据和研究意义，总结了膨胀土、滑坡治理及桩间土拱效应研究的国内外现状，并介绍了论文的主要内容和技术路线以及论文的创新点。第2章从自然地理概况、地形地貌、地层岩性、地质构造、水文地质、物理地质现象和地震介绍了新岩滑坡工程地质概况。第3章分析研究新岩滑坡区的老滑坡及新岩滑坡的地质特征。第4章介绍对新岩滑坡区域岩土体物理力学试验及相关参数。第5章研究分析新岩滑坡的成因机制，进行滑体稳定性评价，并针对性的提出锚索、抗滑桩和反压坡脚三种治理设计。第6章采用FLAC3D数值模拟软件，建立二维平面模型，反演模拟新岩滑坡成因机制，进一步研究新岩滑坡的成因机制。第7章介绍土拱效应，以新岩滑坡为例，建立整体三维模型，研究桩体截面形式和双排桩布置方式对桩间土拱效应的影响。第8章结论与展望，总结了论文所有结论。
[Abstract]:Neo-rock landslide is a kind of high fill embankment landslide in new rock section of Wang Yan first class highway. Because the landslide rock and soil is expansive, it belongs to expansive soft rock landslide. Because of the lack of research on the cause mechanism of landslide, after many years of treatment, there is still no cure, which seriously threatens the normal traffic and safe operation of Wang Yan expressway. According to the engineering geological conditions and sliding body characteristics of new rock landslide, this paper studies and analyzes the genetic mechanism and control design of new rock landslide, and uses two-dimensional model to simulate the forming process of new rock landslide, aiming at the effect of anti-slide pile and soil arch. The integral 3D model of Xinyan landslide is established to study the influence of pile cross-section and double-row pile arrangement on the soil arch effect between piles and to optimize the design of anti-slide pile. The thesis is divided into eight chapters. The first chapter is the introduction, which introduces the basis and significance of the research, summarizes the research status of expansive soil, landslide treatment and soil arch effect between piles at home and abroad. The main content and technical route of the paper and the innovation of the paper are also introduced. In chapter 2, the general situation of engineering geology of new rock landslide is introduced from natural geography, landform, stratigraphic lithology, geological structure, hydrogeology, physical geological phenomenon and earthquake. In chapter 3, the geological characteristics of old landslide and new rock landslide in Neyan landslide area are analyzed and studied. Chapter 4 introduces the physical and mechanical test of rock and soil in the area of Neo-rock landslide and related parameters. In chapter 5, the genetic mechanism of new rock landslide is studied and analyzed, and the stability of sliding body is evaluated, and three kinds of control design, Anchorage cable, anti-slide pile and anti-pressure slope foot, are put forward. In chapter 6, using FLAC3D numerical simulation software, the two-dimensional plane model is established, and the genetic mechanism of neolitic landslide is further studied. In chapter 7, the soil arch effect is introduced. Taking the new rock landslide as an example, the integral three-dimensional model is established to study the influence of the cross-section of pile body and the arrangement of double-row piles on the soil arch effect between piles. Chapter 8, conclusion and prospect, summarize all the conclusions of the paper.
【学位授予单位】：吉林大学
【学位级别】：博士
【学位授予年份】：2014
【分类号】：P642.22;U418.55

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