閩西北山區(qū)公路滑坡災(zāi)害成因分析和防治策略研究
發(fā)布時間：2018-10-31 15:27
【摘要】：隨著我國社會經(jīng)濟(jì)的迅速發(fā)展,山區(qū)公路建設(shè)也日益加快,而在建設(shè)過程中不可避免的會破壞原有的地質(zhì)結(jié)構(gòu),進(jìn)而帶來種種的地質(zhì)災(zāi)害。其中滑坡是山區(qū)公路最常見的一種地質(zhì)災(zāi)害,在各類對山區(qū)公路造成破壞的地質(zhì)災(zāi)害中,滑坡幾乎是對山區(qū)公路的交通暢通以及人們的生命財產(chǎn)安全影響最大的。根據(jù)有關(guān)資料的報道,在福建省內(nèi),閩西北山區(qū)公路滑坡災(zāi)害相對嚴(yán)重,對福建省的社會經(jīng)濟(jì)造成了很大的損失。因此,正確有效的分析閩西北山區(qū)公路滑坡成因并提前對不穩(wěn)定邊坡進(jìn)行防護(hù),是山區(qū)公路建設(shè)的一項重要內(nèi)容。本文以閩西北山區(qū)公路滑坡為研究對象,采取有限元強(qiáng)度折減法對閩西北典型滑坡進(jìn)行穩(wěn)定性分析,然后選取幾個典型滑坡路段分析其滑坡的成因,并提出相對應(yīng)的防治措施,具體研究內(nèi)容及結(jié)果如下:通過收集大量相關(guān)資料對該地區(qū)的滑坡類型以及破壞模式進(jìn)行歸納總結(jié),得出閩西北山區(qū)公路邊坡穩(wěn)定性影響因素主要可分為兩大類:自然因素(地層與巖性、地質(zhì)構(gòu)造、降水、震動、植被)和人為因素(公路選線方案、邊坡結(jié)構(gòu)設(shè)計、公路排水設(shè)計、施工組織設(shè)計與方法、植被的人為破壞)。閩西北山區(qū)公路滑坡的主要滑體類別可分為剝落、崩塌、塌滑、傾倒、滑動和蠕動。詳細(xì)闡述了閩西北山區(qū)公路常見滑坡類型及產(chǎn)生原因、主要防治措施及其適用條件和工藝要求等,對各防護(hù)模式的基本原理、特征、施工方法等進(jìn)行了歸納總結(jié)。針對龍巖東風(fēng)亭滑坡和松溪至建甌高速公路ZK60+200～+600段滑坡的成因分析得出滑坡的產(chǎn)生通常是在多種不利因素下共同長期作用下導(dǎo)致的。在此基礎(chǔ)上根據(jù)不同的滑坡因素,提出相應(yīng)的治理策略,為閩西北地區(qū)其它類似滑坡治理提供參考。最后結(jié)合工程實例,以永安至武平高速公路K184+150～K184+260段中某一典型邊坡剖面為例,利用Ansys有限元軟件建立滑坡有限元模型,然后用有限元強(qiáng)度折減法先對典型滑坡進(jìn)行穩(wěn)定性分析,模擬邊坡變形失穩(wěn)的全過程。根據(jù)分析的結(jié)果和相關(guān)工程技術(shù)人員的建議,提出了五種治理方法,并利用層次分析法、專家群體決策方法及yaahp層次分析軟件對治理方案進(jìn)行綜合評價,獲得各方案的權(quán)重排序,進(jìn)而得到最佳的治理方案。根據(jù)計算結(jié)果的方案排序為D3D2D4D1D5,得出針對此滑坡治理的最優(yōu)方案是方案三,即:錨噴鎖固+排水工程,對今后閩西北山區(qū)公路滑坡治理方案的優(yōu)選有一定的借鑒意義。
[Abstract]:With the rapid development of social economy in our country, the highway construction in mountainous area is also speeding up day by day, and in the process of construction, it will inevitably destroy the original geological structure and bring all kinds of geological disasters. Landslide is the most common geological hazard of mountain highway. Among all kinds of geological disasters, landslide has the greatest influence on the traffic of mountain highway and the safety of people's life and property. According to the related data, in Fujian Province, the highway landslide disaster is relatively serious in the northwestern Fujian Province, which has caused great losses to the social economy of Fujian Province. Therefore, it is an important content of highway construction in mountain area to analyze the cause of highway landslide and to protect the unstable slope in advance. This paper takes highway landslide in western and northern mountain area of Fujian province as the research object, adopts finite element strength reduction method to analyze the stability of typical landslide in northwestern Fujian Province, then selects several typical sections of landslide to analyze the cause of formation of landslide, and puts forward corresponding prevention measures. The specific research contents and results are as follows: through collecting a large number of relevant data, the landslide types and failure patterns in this area are summarized and summarized. It is concluded that the influencing factors of highway slope stability in the northern mountain area of western Fujian can be divided into two categories: natural factors (strata and lithology, geological structure, precipitation, vibration, vegetation) and human factors (highway route selection scheme, slope structure design, etc. Highway drainage design, construction organization design and method, artificial destruction of vegetation). The main landslide types of highway landslide in the northern mountain area of western Fujian can be divided into spalling, collapsing, sliding, sliding and creeping. This paper expounds in detail the common landslide types and causes, main prevention measures, applicable conditions and technological requirements of highways in the northwestern mountain area of Fujian Province, and summarizes the basic principles, characteristics and construction methods of each protective mode. Based on the genetic analysis of Dongting landslide in Longyan and the landslide in ZK60 200 ~ 600 section of Songxi to Jianou expressway, it is concluded that the landslide is usually caused by the long-term action of various unfavorable factors. On this basis, according to different landslide factors, the corresponding control strategies are put forward to provide reference for other similar landslide treatment in Northwest Fujian. Finally, taking a typical slope section in the K184 150~K184 260 section of Yongan to Wuping Expressway as an example, the finite element model of landslide is established by using Ansys finite element software. Then the finite element strength reduction method is used to analyze the stability of typical landslide and simulate the whole process of slope deformation and instability. According to the results of the analysis and the suggestions of the related engineers and technicians, five kinds of governance methods are put forward, and the comprehensive evaluation of the governance scheme is carried out by using the analytic hierarchy process, expert group decision making method and yaahp analytic hierarchy process software. Get the weight ranking of each scheme, and then get the best governance scheme. According to the result of calculation, the order is D _ 3D _ 2D _ 4D _ 1D _ 5, and the optimal scheme for this landslide treatment is the third scheme, that is, anchoring and shotcrete locking and drainage project, which has certain reference significance for the future selection of the landslide treatment scheme in the northwestern mountain area of Fujian Province.
【學(xué)位授予單位】：福建農(nóng)林大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：U418.55
本文編號：2302693
[Abstract]:With the rapid development of social economy in our country, the highway construction in mountainous area is also speeding up day by day, and in the process of construction, it will inevitably destroy the original geological structure and bring all kinds of geological disasters. Landslide is the most common geological hazard of mountain highway. Among all kinds of geological disasters, landslide has the greatest influence on the traffic of mountain highway and the safety of people's life and property. According to the related data, in Fujian Province, the highway landslide disaster is relatively serious in the northwestern Fujian Province, which has caused great losses to the social economy of Fujian Province. Therefore, it is an important content of highway construction in mountain area to analyze the cause of highway landslide and to protect the unstable slope in advance. This paper takes highway landslide in western and northern mountain area of Fujian province as the research object, adopts finite element strength reduction method to analyze the stability of typical landslide in northwestern Fujian Province, then selects several typical sections of landslide to analyze the cause of formation of landslide, and puts forward corresponding prevention measures. The specific research contents and results are as follows: through collecting a large number of relevant data, the landslide types and failure patterns in this area are summarized and summarized. It is concluded that the influencing factors of highway slope stability in the northern mountain area of western Fujian can be divided into two categories: natural factors (strata and lithology, geological structure, precipitation, vibration, vegetation) and human factors (highway route selection scheme, slope structure design, etc. Highway drainage design, construction organization design and method, artificial destruction of vegetation). The main landslide types of highway landslide in the northern mountain area of western Fujian can be divided into spalling, collapsing, sliding, sliding and creeping. This paper expounds in detail the common landslide types and causes, main prevention measures, applicable conditions and technological requirements of highways in the northwestern mountain area of Fujian Province, and summarizes the basic principles, characteristics and construction methods of each protective mode. Based on the genetic analysis of Dongting landslide in Longyan and the landslide in ZK60 200 ~ 600 section of Songxi to Jianou expressway, it is concluded that the landslide is usually caused by the long-term action of various unfavorable factors. On this basis, according to different landslide factors, the corresponding control strategies are put forward to provide reference for other similar landslide treatment in Northwest Fujian. Finally, taking a typical slope section in the K184 150~K184 260 section of Yongan to Wuping Expressway as an example, the finite element model of landslide is established by using Ansys finite element software. Then the finite element strength reduction method is used to analyze the stability of typical landslide and simulate the whole process of slope deformation and instability. According to the results of the analysis and the suggestions of the related engineers and technicians, five kinds of governance methods are put forward, and the comprehensive evaluation of the governance scheme is carried out by using the analytic hierarchy process, expert group decision making method and yaahp analytic hierarchy process software. Get the weight ranking of each scheme, and then get the best governance scheme. According to the result of calculation, the order is D _ 3D _ 2D _ 4D _ 1D _ 5, and the optimal scheme for this landslide treatment is the third scheme, that is, anchoring and shotcrete locking and drainage project, which has certain reference significance for the future selection of the landslide treatment scheme in the northwestern mountain area of Fujian Province.
【學(xué)位授予單位】：福建農(nóng)林大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：U418.55
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