某滑坡稳定性分析和防治 - 图文

2014届本科毕业论文

某滑坡稳定性分析及其防治研究

学 院 土木工程学院 专业班级 10地质1班 学 号 10201070129 学生姓名 李 华 波 指导教师 汪 东 林 提交日期 2014年06月

摘 要

滑坡是一种地质灾害，我国滑坡灾害每年至少造成800人死亡。据估计，全国共发育有特大型崩塌50多处、滑坡140多处、泥石流150多处，较大型崩塌 3000多处、滑坡2000多处、泥石流2000多处。每年因崩塌、滑坡、泥石流等灾害所造成的直接经济损失约200亿元人民币，间接损失更是难以估计，危害程度仅次于地震。

某滑坡形成于2007年雨季，共发育两处滑坡，分别命名为H1滑坡和H2滑坡。受2010年“7.16”强降雨影响，于2010年7月17日零晨，H1、H2滑坡均又发生了较大规模的滑动，滑坡的体积分别为2.805×104m3和3.08×104m3，均属小型土质浅层推移式滑坡。目前，该两处滑坡的变形迹象主要分布在滑坡中后部，以滑坡后缘出现明显的下错裂缝（地面沉降）和拉张裂缝为主，滑坡前缘局部出现树木歪斜、电杆歪斜和小范围垮塌现象。该两处滑坡自2007年形成以来，每至雨季均有不同规模的变形破坏，以2010年7月17发生的变形破坏最为严重。因此，某H1、H2滑坡在天然状况下处于稳定～基本稳定状态；尽管如此，滑坡的变形破坏仍然是不可低估的，尤其在未来的强降雨或连续降雨的影响下继续变形而处于欠稳定～不稳定状态，进而发生整体失稳，对坡体下方居民的生命财产、通讯线路安全及上方公路和行人安全造成极大的威胁和危害。

本文以某滑坡进行滑坡的稳定性评价和推力计算，为防治方案的确定及防治工程初步设计提供建议。

关键词：滑坡；稳定性分析；推力计算；滑坡防治

Abstract

Landslide is a kind of geological hazards, each year, 800 people were killed by landslide at least. It is estimated that, there were more than 50 giant collapses, more than 140 giant landslides and more than 150 giant mud-rock flows all over our country, also, more than 3000large collapses, more than 2000 large landslides and more than 2000 large mud-rock flows.Every year, about 20 billion Yuan direct economic loss caused by collapses, landslides and mud-rock flow, not to mention indirect economic losses. The degree of geological disasters is only less than the earthquake hazard. Therefore, researches on prediction of landslide hazards have great significance.

This landslide in the rainy season in 2007,Development of two landslide,Were named H1 and H2 landslide landslide.By 2010, \heavy rainfall,On July 17, 2010 midnight, H1, H2 landslide took place in both large-scale slide,Landslide volume was 2.805 × 104m3 and 3.08 × 104m3,Are small Shallow soil goes landslide. Currently, the two signs of landslide landslide deformation is mainly distributed in the rear,In landslide has obvious after fault (land subsidence) and tensile cracks is given priority to,Preceding the local trees askew, pole skewed and small scale collapse phenomenon. The two landslide formed since 2007,Each have different sizes of deformation damage to the rainy season,July 17 in 2010, the worst of deformation and destruction.Therefore, H1, H2 landslide under natural conditions in a state of stability to basic stability;Even so, the landslide deformation and failure is still cannot be underestimated,Especially heavy rainfall or continuous rainfall in the future to continue under the influence of deformation and in unstable to unstable state,Then overall instability occurs,Of life and property safety of residents communication lines beneath the slope And above the highway and pedestrian safety and harm caused great threat.

This paper takes a certain landslide stability evaluation and landslide thrust calculation,For the preliminary design scheme of prevention and cure and prevention and control engineering.

Key words: Landslide; Stability analysis; The landslide thrust calculation；The

landslide prevention and control of

目 录

第一章 绪论........................................................................................................ 1

1.1 研究背景............................................................................................... 1 1.2 国内外研究现状................................................................................... 1 1.3 滑坡防治的工程现状........................................................................... 4 第二章 某滑坡区地质环境.................................................................................. 5

2.1 自然地理条件......................................................................................... 5

2.1.1位置与交通................................................................................... 5 2.1.2气象与水文情况........................................................................... 6 2.1.3植被............................................................................................... 6 2.1.5区域经济状况............................................................................... 6 2.2 地质环境条件......................................................................................... 7

2.2.1地形地貌....................................................................................... 7 2.2.2地层岩性....................................................................................... 8 2.2.3地质构造....................................................................................... 9 2.2.4新构造运动与地震..................................................................... 10 2.2.5水文地质条件............................................................................. 11 2.2.6不良地质现象............................................................................. 11 2.2.7人类工程活动............................................................................. 11

第三章 某滑坡基本特征.................................................................................... 13

3.1滑坡边界、规模、形态特征................................................................ 13

3.1.1滑坡边界特征............................................................................. 13 3.1.2滑坡规模和形态特征................................................................. 14 3.2滑体土特征............................................................................................ 15

3.2.1滑体物质组成及结构特征......................................................... 15 3.2.2地下水的活动状态及滑体土的渗透性..................................... 16 3.3滑床特征................................................................................................ 16 3.4滑动带特征............................................................................................ 17 3.5滑坡岩土体物理力学参数.................................................................... 17

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