發(fā)布時間：2018-04-15 06:36

  本文選題：長安區(qū) + 滑坡崩塌��； 參考：《西北大學》2015年碩士論文

【摘要】：西安市長安區(qū)地形地貌多樣,山、川、塬皆俱。秦嶺北坡及黃土臺塬邊緣滑坡崩塌地質(zhì)災害發(fā)育,其分布廣、危害嚴重,是陜西省地質(zhì)災害較嚴重的區(qū)之一�；�坡崩塌地質(zhì)災害嚴重威脅著本區(qū)人民生命和財產(chǎn)安全,影響著本地區(qū)經(jīng)濟社會的發(fā)展。本文以長安區(qū)為研究區(qū)域,在充分搜集長安區(qū)自然地理、氣象水文、區(qū)域地質(zhì)環(huán)境條件等資料的基礎上,通過野外地質(zhì)調(diào)查,結(jié)合長安區(qū)滑坡崩塌地質(zhì)災害點的實際調(diào)查資料,對長安區(qū)的滑坡崩塌地質(zhì)災害發(fā)育特征及分布規(guī)律進行了詳細分析；運用GIS地學信息圖譜和確定性系數(shù)CF法研究了長安區(qū)滑坡崩塌災害的孕育規(guī)律,并應用模糊綜合評判法對長安區(qū)滑坡崩塌災害的易發(fā)性進行區(qū)劃,得到易發(fā)性分區(qū)圖。本文研究的主要內(nèi)容有：(1)通過野外地質(zhì)調(diào)查,結(jié)合長安區(qū)滑坡崩塌地質(zhì)災害點的實際調(diào)查資料,從物質(zhì)組成、力學性質(zhì)、誘發(fā)因素和滑體規(guī)模等多個方面對研究區(qū)滑坡和崩塌災害進行了分類統(tǒng)計；詳細地總結(jié)了長安區(qū)滑坡崩塌災害發(fā)育現(xiàn)狀：長安區(qū)滑坡崩塌總共103處,其中滑坡點67處,占災害總數(shù)的65%,崩塌點36處,占災害總數(shù)的35%；(2)通過GIS軟件繪制了研究區(qū)的滑坡崩塌災害分布圖,結(jié)合實際調(diào)查資料,詳細分析了長安區(qū)滑坡崩塌空間分布規(guī)律：由于長安區(qū)地貌多樣,地形地貌差異大,故滑坡崩塌災害的分布極不均勻�；�坡崩塌災害有聚集性的特點,發(fā)育在南部秦嶺山區(qū)和東部黃土臺塬區(qū)和山前洪積扇區(qū),而地形平坦的西部渭河沖積平原區(qū)地質(zhì)災害不發(fā)育；發(fā)育滑坡崩塌災害點數(shù)量較多街道辦有王莽,王曲,韋曲和子午；在時間分布上與降雨因素密切相關。(3)運用GIS地學信息圖譜,從地面高程、坡度、坡向、工程地質(zhì)巖組、與道路的距離、年均降雨量、與斷裂的距離、與水系的距離等八個方面系統(tǒng)地研究了長安區(qū)滑坡崩塌地質(zhì)災害的成災條件和孕育規(guī)律：滑坡崩塌災害主要發(fā)育于以黃土及松散粘性碎石土為主的工程地質(zhì)巖組中。在小于1350m高程范圍,坡度在10°-30。范圍,坡向向南,滑坡密集發(fā)育；在高程450-900m、坡度15-30。的緩坡范圍內(nèi),崩塌發(fā)育密集；在距離道路1000m的范圍,距離斷裂1000m的范圍,距離水系500m的范圍,滑坡崩塌發(fā)育明顯。(4)在對長安區(qū)滑坡崩塌地質(zhì)災害孕育規(guī)律研究的基礎上,以灰色系統(tǒng)理論確定影響因子權(quán)重,以梯形函數(shù)確定定量因子隸屬度的基礎上采用模糊綜合評判法對長安區(qū)滑坡崩塌地質(zhì)災害進行易發(fā)性區(qū)劃,得到具體的區(qū)劃結(jié)果。長安區(qū)滑坡崩塌易發(fā)性分區(qū)分為6個高易發(fā)區(qū)域(A1, A2, A3, A4, A5, A6),3個中易發(fā)區(qū)(B1,B2,B3),1個低易發(fā)區(qū)(C)和1個不易發(fā)區(qū)(D)。
[Abstract]:Xi'an Changan District topography is diverse, mountains, rivers, tableland are all.The landslide collapse on the northern slope of the Qinling Mountains and the margin of the Loess Plateau is one of the most serious geological hazards in Shaanxi Province, with its wide distribution and serious hazards.The landslide collapse geological disaster seriously threatens the people's life and property safety, and affects the economic and social development of the area.In this paper, taking Changan district as the research area, on the basis of fully collecting the data of natural geography, meteorology and hydrology, regional geological environment conditions and other data in Changan District, through field geological investigation, combined with the actual investigation data of landslide collapse geological hazard site in Changan District,The development characteristics and distribution of landslide collapse in Changan district are analyzed in detail, and the gestation law of landslide collapse in Changan area is studied by means of GIS geological information map and deterministic coefficient CF method.The vulnerability of landslide collapse in Changan district was zoned by fuzzy comprehensive evaluation method, and the map of vulnerability zoning was obtained.The main contents of this paper are as follows: (1) through field geological survey, combining with the actual investigation data of landslide collapse geological hazard site in Changan District, from the material composition and mechanical properties,The inductive factors and the scale of landslide body were classified and counted, and the development status of landslide collapse disaster in Changan district was summarized in detail: there were 103 landslide collapses in Changan district, among which 67 were landslide spots.Taking up 65% of the total number of disasters, 36 collapse sites and 35% of the total number of disasters) the distribution map of landslide collapse disaster in the study area has been drawn by GIS software, and combined with the actual investigation data,The spatial distribution of landslide collapse in Changan area is analyzed in detail. Because of the diversity of landform and the difference of landform and geomorphology, the distribution of landslide collapse disaster is extremely uneven.The landslide collapse is characterized by accumulation, which is developed in the southern Qinling Mountains, the eastern loess tableland and the front flood sector, but the geological hazards are not developed in the Weihe River alluvial plain area in the western part of the region with flat topography.The development of landslide collapse disaster sites in the number of streets are Wang Mang, Wang qu, Wei qu and Meridian; and closely related to rainfall factors in time distribution.) using GIS geoscience information atlas, from the surface elevation, slope, slope direction, engineering geological rock formation,Distance from roads, annual rainfall, distance from fractures,In eight aspects, such as the distance from the water system, the formation conditions and gestation rules of the landslide collapse geological hazard in Changan district are systematically studied. The landslide collapse disaster mainly develops in the engineering geological rock formation of loess and loose cohesive gravel soil.In the range of less than 1350m elevation, the slope is 10 擄-30 擄.Range, slope south, landslide dense development; in elevation 450-900m, slope 15-30.In the range of 1000m from the road, 1000m from the fault, 500m from the water system, the development of the landslide collapse is obvious. 4) on the basis of the study on the laws of the geological hazard of landslide collapse in Changan district, the development of the landslide is dense, and the development of the landslide is obvious in the range of 1000m from the road, 1000m from the fault, 500m from the water system.Based on the grey system theory to determine the weight of the influencing factors and the trapezoidal function to determine the membership of quantitative factors, the fuzzy comprehensive evaluation method is used to carry out the risk zoning of the landslide collapse geological hazards in Changan district, and the concrete regionalization results are obtained.The landslide collapse susceptibility zoning in Changan district is divided into 6 high risk areas: A1, A2, A3, A4, A5, A6, B1B2B3, 1 low risk area (C3) and 1 non prone area (DX). The area with low risk of landslide collapse is divided into 6 high risk areas (A1, A2, A3, A4, A5, A6).
【學位授予單位】：西北大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：P642.2

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