头道沟松散堆积层滑坡稳定性评价及其发展趋势分析
发布时间：2018-09-04 06:12
【摘要】：我国山地的面积约占土地总面积的三分之二,是世界上发生滑坡地震灾害较多的国家之一。泥石流、崩塌、滑坡等地质灾害频繁的发生,对区域的地质环境往往起到了破坏性的作用,同时威胁了人们的生命安危,损害了人们的财产安全,这必然严重影响到了工程建设活动的安全和社会经济的可持续发展。因此,对于滑坡的研究分析是一项十分重要的内容。头道沟松散堆积层滑坡是—中型浅层土质滑坡,它直接威胁了头道沟下游矿山选矿车间以及矿区道路的安全使用,并且在暴雨季节有发生泥石流的可能性,直接经济损失巨大,潜在经济损失无法估量。这给当地人们的生命和财产造成了严重威胁。因此对头道沟松散堆积层滑坡形成的地质环境背景、特征、稳定性进行研究,并预测其发展趋势以及提出治理方案,不但能够为该地区人们的防灾减灾工作提供有效的理论依据,而且也能为其他地质环境类似地区的滑坡研究提供一定的依据。本论文以头道沟松散堆积层滑坡为研究对象,首先论述了该滑坡形成的的地质环境背景,进而对滑坡的基本特征、岩土体的物理力学特征、变性特征及形成原因进行了分析,并在此基础了采用定性分析与定量分析相结合的方法,对该滑坡的稳定性进行了分析与评价,最后对其发展趋势进行了分析及预测,提出了三种治理方案,并采用模糊综合评判的方法对其进行了优选。主要得到了以下结论:(1)头道沟松散堆积层滑坡为一中型牵引式滑坡,平面形态呈舌型,滑体长约745m,宽约30-80m,厚3-30m,体积约90×104m3,滑体物质以第四系松散堆积物为主;滑带为堆积碎石土底部和下伏基岩顶面的接触带,倾向近正北;滑床为泥盆系硅质板岩,风化强度中度;在滑坡中部可见多条拉张裂缝,走向与滑向垂直,勘察期间仍处于扩展延伸阶段。(2)通过对头道沟松散堆积层滑坡的稳定性进行分析得出:在天然状态下,该滑坡处于基本稳定状态;在饱和状态下,该滑坡处于不稳定性状态,滑坡失稳下滑的可能性较大;在地震作用下,滑坡整体处于不稳定状态,滑坡失稳下滑的可能性极大。(3)在对该滑坡发展趋势进行分析的基础上,提出三种具体的治理方案:截排水+抗滑支挡+坡改梯+生物固土方案、分级微型桩+锚索挡墙+截排水+生物固化方案和分级刷方+铅丝笼挡墙+截排水+生物固化方案。最后运用模糊评判方法对其进行优化选择,得出截排水+抗滑支挡+坡改梯+生物固土方案为治理该滑坡的最优方案。
[Abstract]:The mountainous area of our country accounts for about 2/3 of the total land area, and it is one of the countries with more landslide and earthquake disasters in the world. The frequent occurrence of debris flows, landslides, landslides and other geological disasters has often played a destructive role in the regional geological environment. At the same time, it has threatened the lives of people and damaged the safety of people's property. This must seriously affect the safety of engineering construction activities and the sustainable development of social economy. Therefore, the research and analysis of landslide is a very important content. The loose accumulation layer landslide in Tudaogou is a medium shallow soil landslide, which directly threatens the safe use of mine dressing workshop and mining road in the lower reaches of Tudaogou, and has the possibility of debris flow in the torrential rain season, and the direct economic loss is huge. Potential economic losses are incalculable. This poses a serious threat to the lives and property of the local people. Therefore, the geological environment background, characteristics and stability of the landslide formed in the loose accumulation layer of Tudaogou are studied, and the development trend is forecasted and the treatment scheme is put forward. It can not only provide effective theoretical basis for people's disaster prevention and mitigation in this area, but also provide certain basis for landslide research in other similar geological environment areas. This paper takes the Tudaogou loose accumulation layer landslide as the research object, first discusses the geological environment background of the landslide formation, and then analyzes the basic characteristics of the landslide, the physical and mechanical characteristics of the rock and soil, the denaturation characteristics and the causes of formation. On this basis, the stability of the landslide is analyzed and evaluated by combining qualitative analysis with quantitative analysis. Finally, the development trend of the landslide is analyzed and predicted, and three control schemes are put forward. The method of fuzzy comprehensive evaluation is used to select it. The main conclusions are as follows: (1) Tudaogou loose layer landslide is a medium type traction landslide with a tongue shape, about 745m in length, 30-80m in width, 3-30m in thickness and 90 脳 104m3 in volume. The slip zone is the contact zone between the bottom of the deposited gravel and the top of the lower voluminous rock, and tends to be near the north, and the sliding bed is the Devonian siliceous slate with moderate weathering intensity. In the middle of the landslide, there are many extensional fractures, and the strike is vertical to the sliding direction. During the survey period, the landslide is still in the extended extension stage. (2) through the analysis of the stability of the loose accumulation layer landslide in the Tudaogou, it is concluded that the landslide is basically stable in the natural state, and the landslide is in the unstable state in the saturated state. Under the earthquake action, the landslide is in an unstable state, and the landslide instability and slide is very likely. (3) based on the analysis of the development trend of the landslide, Three specific treatment schemes are put forward: the biological soil consolidation scheme of intercepting drainage anti-slide retaining slope changing ladder, the bio-solidifying scheme of intercepting drainage of classified micro-pile anchor cable retaining wall and the bio-solidification scheme of graded lead-cage retaining wall. Finally, the fuzzy evaluation method is used to optimize the selection, and it is concluded that the biological soil consolidation scheme of blocking slope with anti-slide support is the best scheme for the treatment of the landslide.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P642.22
本文编号：2221249
[Abstract]:The mountainous area of our country accounts for about 2/3 of the total land area, and it is one of the countries with more landslide and earthquake disasters in the world. The frequent occurrence of debris flows, landslides, landslides and other geological disasters has often played a destructive role in the regional geological environment. At the same time, it has threatened the lives of people and damaged the safety of people's property. This must seriously affect the safety of engineering construction activities and the sustainable development of social economy. Therefore, the research and analysis of landslide is a very important content. The loose accumulation layer landslide in Tudaogou is a medium shallow soil landslide, which directly threatens the safe use of mine dressing workshop and mining road in the lower reaches of Tudaogou, and has the possibility of debris flow in the torrential rain season, and the direct economic loss is huge. Potential economic losses are incalculable. This poses a serious threat to the lives and property of the local people. Therefore, the geological environment background, characteristics and stability of the landslide formed in the loose accumulation layer of Tudaogou are studied, and the development trend is forecasted and the treatment scheme is put forward. It can not only provide effective theoretical basis for people's disaster prevention and mitigation in this area, but also provide certain basis for landslide research in other similar geological environment areas. This paper takes the Tudaogou loose accumulation layer landslide as the research object, first discusses the geological environment background of the landslide formation, and then analyzes the basic characteristics of the landslide, the physical and mechanical characteristics of the rock and soil, the denaturation characteristics and the causes of formation. On this basis, the stability of the landslide is analyzed and evaluated by combining qualitative analysis with quantitative analysis. Finally, the development trend of the landslide is analyzed and predicted, and three control schemes are put forward. The method of fuzzy comprehensive evaluation is used to select it. The main conclusions are as follows: (1) Tudaogou loose layer landslide is a medium type traction landslide with a tongue shape, about 745m in length, 30-80m in width, 3-30m in thickness and 90 脳 104m3 in volume. The slip zone is the contact zone between the bottom of the deposited gravel and the top of the lower voluminous rock, and tends to be near the north, and the sliding bed is the Devonian siliceous slate with moderate weathering intensity. In the middle of the landslide, there are many extensional fractures, and the strike is vertical to the sliding direction. During the survey period, the landslide is still in the extended extension stage. (2) through the analysis of the stability of the loose accumulation layer landslide in the Tudaogou, it is concluded that the landslide is basically stable in the natural state, and the landslide is in the unstable state in the saturated state. Under the earthquake action, the landslide is in an unstable state, and the landslide instability and slide is very likely. (3) based on the analysis of the development trend of the landslide, Three specific treatment schemes are put forward: the biological soil consolidation scheme of intercepting drainage anti-slide retaining slope changing ladder, the bio-solidifying scheme of intercepting drainage of classified micro-pile anchor cable retaining wall and the bio-solidification scheme of graded lead-cage retaining wall. Finally, the fuzzy evaluation method is used to optimize the selection, and it is concluded that the biological soil consolidation scheme of blocking slope with anti-slide support is the best scheme for the treatment of the landslide.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P642.22
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