發(fā)布時間：2018-08-29 09:38

【摘要】：陜南秦巴山區(qū)多高山峻嶺,地質(zhì)構(gòu)造十分復(fù)雜。秦巴山區(qū)公路邊坡災(zāi)害的誘發(fā)因素十分復(fù)雜,降雨較多且較為集中,每年7-9月是秦巴山區(qū)的雨季,該季節(jié)降雨量大且持續(xù)時間較長,地質(zhì)災(zāi)害時常發(fā)生,秦巴山區(qū)地質(zhì)災(zāi)害的形式為:崩塌,滑坡,泥石流為主。邊坡災(zāi)害造成公路堵塞,對人民生命財產(chǎn)安全造成威脅,因此,對秦巴山區(qū)公路邊坡災(zāi)害的成災(zāi)機(jī)理的研究十分必要。首先,本文通過對十天高速漢中西段151km有隱患的邊坡、棄碴場、涵洞進(jìn)行了調(diào)查和初步研究。重點(diǎn)調(diào)查了37個災(zāi)害點(diǎn),災(zāi)害隱患主要是滑坡、崩塌落石、坍塌、泥石流、棄碴場、涵洞水毀等。調(diào)查內(nèi)容主要包括棄土棄碴場的堆積區(qū)特性、棄碴的處理措施,斜坡的幾何形態(tài)及場地地貌、斜坡的地質(zhì)條件(地層巖性、結(jié)構(gòu)面產(chǎn)狀及特征等)、河道條件等。調(diào)查通過查閱資料、現(xiàn)場調(diào)查、施工單位填寫調(diào)查表等形式,將針對不同的災(zāi)害點(diǎn)和標(biāo)段的基本概況,找出存在的隱患,對該處是否易發(fā)災(zāi)害及易發(fā)何種災(zāi)害作出初評結(jié)論,給出不同的建議和相應(yīng)的措施。其次,通過對十天高速漢中西段邊坡災(zāi)害調(diào)查,根據(jù)土類形成條件的不同,確定邊坡災(zāi)害的主要類型有:坡積層滑坡,堆積層滑塌,膨脹土滑坡,殘積層滑坡,巖質(zhì)邊坡崩塌,巖質(zhì)邊坡滑坡等。通過對現(xiàn)場情況的調(diào)查和研究,結(jié)合秦巴山區(qū)的環(huán)境及氣候特點(diǎn),研究邊坡災(zāi)害的成災(zāi)機(jī)理。最后,研究災(zāi)害發(fā)生的原因有:地形地貌特點(diǎn),降雨及地下水作用,人類工程活動等及地質(zhì)災(zāi)害的成災(zāi)機(jī)理,給出相應(yīng)的設(shè)計(jì)、施工建議。本文通過對十天高速漢中西段公路邊坡災(zāi)害的調(diào)查,結(jié)合現(xiàn)場調(diào)查情況及秦巴山區(qū)地質(zhì)、氣候條件,對邊坡災(zāi)害類型進(jìn)行分類,并對成災(zāi)機(jī)理及致災(zāi)因素進(jìn)行分析總結(jié),并針對不同的災(zāi)害類型給出相應(yīng)的處置對策。
[Abstract]:There are many high mountains in the Qinba Mountains in the south of Shaanxi, and the geological structure is very complicated. The induced factors of highway slope disaster in Qinba Mountain area are very complicated, the rainfall is more and more concentrated. Every July and September is the rainy season in Qinba Mountain area. The rainfall in this season is large and lasting for a long time, and geological disasters often occur. Qinba Mountain area geological hazards in the form of: collapse, landslide, debris flow. Slope disasters cause road blockage and threaten the safety of people's life and property. Therefore, it is necessary to study the mechanism of highway slope disasters in Qinba Mountain area. Firstly, this paper investigates and preliminarily studies the hidden slope, ballast dump and culvert of 151km in the West Hanzhong section of ten days high speed. The main hazards are landslide, collapse, debris flow, ballast dump, culvert damage and so on. The contents of the investigation mainly include the characteristics of the accumulation area of the dump site, the disposal measures, the geometry and geomorphology of the slope, the geological conditions of the slope (stratigraphic lithology, the occurrence and characteristics of the structural surface, etc.), the condition of the river course, and so on. In the form of consulting data, on-the-spot investigation, and construction units filling out questionnaires, the investigation will find out the hidden dangers in view of the basic situation of different disaster spots and segments, and make a preliminary evaluation conclusion on whether and what kind of disasters are likely to occur there. Different suggestions and corresponding measures are given. Secondly, through the investigation of the slope disasters in the west section of Hanzhong section of ten days high speed, according to the different forming conditions of soil, the main types of slope disasters are determined as follows: landslide of slope accumulation layer, landslide of expansive soil, landslide of residual layer, collapse of rock slope. Rock slope landslide etc. Based on the investigation and study of the field situation and the environmental and climatic characteristics of Qinba Mountain area, the mechanism of slope disaster is studied. Finally, the causes of disasters are studied, such as the characteristics of topography and landform, rainfall and groundwater, human engineering activities, and the mechanism of geological disasters, and the corresponding design and construction suggestions are given. Based on the investigation of highway slope disasters in the west section of Hanzhong highway in ten days, combined with the field investigation and the geological and climatic conditions of Qinba Mountain area, the types of slope disasters are classified, and the mechanism of disaster formation and the factors causing disasters are analyzed and summarized in this paper. According to different types of disasters, the corresponding countermeasures are given.
【學(xué)位授予單位】：長安大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U412.22

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本文編號：2210814