新岩滑坡成因机制及抗滑桩桩土效应研究
[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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