山西省黃土崩塌地質(zhì)災(zāi)害的現(xiàn)狀及水敏感性分析
[Abstract]:Taking the loess collapse disaster of Shanxi Province as an example, it is concluded that the geological environment in Shanxi province is complicated and the loess geological hazard has many kinds, The distribution is wide and the frequency is high, in which the collapse is the main and the number of collapse accounts for more than 73% of the total number of geological disasters in the loess area. and with the development of Shanxi's economy, the impact of human activities on the geological disasters is becoming more and more serious; in addition to the geological disasters that have taken place, a large number of potential hidden danger points of the loess collapse in Shanxi are also existed, The hidden danger of these disasters poses a great threat to the lives and property of the people. 2. The occurrence of loess collapse is the result of the comprehensive effect of various factors, including the self-factors of loess soil and the external trigger factors. Among them, the external trigger factors of loess collapse are rainfall, soil freeze-thaw, groundwater erosion, river erosion, human activities and biological activities. The effect of rainfall and freeze-thaw on the collapse of loess is the most serious. In the early stage of the disaster, the water content of the soil is rapidly increased, the shear strength of the soil is continuously reduced, and the self-weight is continuously increased, and the shear strength between the soil bodies is not sufficient to maintain the self-gravity and the soil mass can fall, And the collapse hazard is formed. In view of the water sensitivity analysis of the collapse of the loess, the field sampling is carried out on the disaster points of three geological disasters, namely, Jixian, Yongand and Linxian, and the experimental results of the shear strength of the indoor direct shear under different water content are carried out on the original undisturbed soil samples. The relationship between the cohesive force and internal friction angle of the soil and the water content were analyzed. The results show that the experimental rules of the soil samples in Jixian and Yongand two counties are similar, and the results show that the shear strength of the loess reaches the maximum in the limit water content, and the water content of the two counties is respectively (17-2.00)% and (15-2.00)% respectively. In the event of collapse, the water content of soil is much higher than the water content of this limit, and the shear strength decreases sharply with the increase of water content. The water content of this limit can be used as the early warning value of the disaster area. The experimental results of Linxian County are as follows: the experimental law of Jixian and Yonghe is different, and the shear strength decreases with the increase of the water content, and the difference is that the water content in the natural state of the loess in Linxian is low and the porosity is large, which is the large-pore loess of the support. The strength of the soil skeleton is less than that of the structural strength, and the structural strength depends on the properties of the interparticle bond and the crystal structure. The soluble salts and some of the organic matter in these materials can be dissolved in water, and the cement and the crystal structure in the loess are broken and the cohesion is lost; and the water content of the permanent and loess in the Jixian County is high, the void rate is low, and the strength is mainly determined by the cementation effect between the strength of the skeleton and the particles, When the water content of the soil is very low, the bonding force between the soil and the soil can not fully play its role, and the cohesive force of the soil is low; and as the water content is increasing, the binding force of the soil is increased, and the cohesive force of the soil is increased.
【學(xué)位授予單位】:太原理工大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2016
【分類號】:P642.21
【相似文獻(xiàn)】
相關(guān)期刊論文 前10條
1 吳子榮;;黃土與氣候[J];第四紀(jì)研究;1989年02期
2 景可;黃土與黃土高原[J];大自然;2005年01期
3 卞敬玲;高原黃土動(dòng)力特征研究[J];青海師范大學(xué)學(xué)報(bào)(自然科學(xué)版);2002年03期
4 李書慶;;靜寧地區(qū)的黃土[J];西北地質(zhì);1975年04期
5 岳樂平;染色有機(jī)玻璃黃土結(jié)構(gòu)薄片制作方法[J];西北大學(xué)學(xué)報(bào)(自然科學(xué)版);1978年03期
6 劉祖典;李靖;;黃土的物理力學(xué)性質(zhì)和變形特性[J];第四紀(jì)研究;1986年01期
7 李曉輝;杜艷霞;李廣;;關(guān)中地區(qū)黃土的動(dòng)力性質(zhì)[J];地球與環(huán)境;2005年S1期
8 王朝陽;倪萬魁;蒲毅彬;;三軸剪切條件下黃土結(jié)構(gòu)特征變化細(xì)觀試驗(yàn)[J];西安科技大學(xué)學(xué)報(bào);2006年01期
9 袁中夏,王蘭民,鄧津;電鏡圖像在黃土結(jié)構(gòu)性研究中應(yīng)用的幾個(gè)問題(英文)[J];西北地震學(xué)報(bào);2005年02期
10 李蘭,王蘭民,劉旭;極震區(qū)黃土微結(jié)構(gòu)的試驗(yàn)研究[J];中國地震;2005年03期
相關(guān)會(huì)議論文 前9條
1 劉祖典;郭增玉;陳正漢;;陜西黃土的變形特性[A];中國土木工程學(xué)會(huì)第四屆土力學(xué)及基礎(chǔ)工程學(xué)術(shù)會(huì)議論文選集[C];1983年
2 劉祖典;郭增玉;;黃土的工程地質(zhì)特征及分類命名[A];巖石力學(xué)新進(jìn)展與西部開發(fā)中的巖土工程問題——中國巖石力學(xué)與工程學(xué)會(huì)第七次學(xué)術(shù)大會(huì)論文集[C];2002年
3 李曉輝;杜艷霞;李廣;;關(guān)中地區(qū)黃土的動(dòng)力性質(zhì)[A];中國地質(zhì)學(xué)會(huì)工程地質(zhì)專業(yè)委員會(huì)、貴州省巖石力學(xué)與工程學(xué)會(huì)2005年學(xué)術(shù)年會(huì)暨“巖溶·工程·環(huán)境”學(xué)術(shù)論壇論文集[C];2005年
4 田堪良;張慧莉;駱亞生;張伯平;羅碧玉;;黃土的結(jié)構(gòu)強(qiáng)度及其定量分析方法[A];巖石力學(xué)新進(jìn)展與西部開發(fā)中的巖土工程問題——中國巖石力學(xué)與工程學(xué)會(huì)第七次學(xué)術(shù)大會(huì)論文集[C];2002年
5 鄧洪亮;謝向文;郭玉松;尹金寬;;黃土浸水破壞機(jī)理研究[A];第14屆全國結(jié)構(gòu)工程學(xué)術(shù)會(huì)議論文集(第二冊)[C];2005年
6 石堅(jiān);李敏;賀建輝;王毅紅;;黃土的彈塑性帽蓋模型[A];第14屆全國結(jié)構(gòu)工程學(xué)術(shù)會(huì)議論文集(第二冊)[C];2005年
7 夏旺民;郭增玉;;黃土彈塑性損傷本構(gòu)模型[A];第三屆全國巖土與工程學(xué)術(shù)大會(huì)論文集[C];2009年
8 楚華棟;裴章勤;馬周全;熊志文;魏佳中;;黃土的工程特性、筑路技術(shù)和病害處理[A];中國鐵道工程地質(zhì)世紀(jì)成就論文集[C];2005年
9 王存玉;;某工程黃土的工程地質(zhì)性質(zhì)及自穩(wěn)能力研究[A];第五屆全國工程地質(zhì)大會(huì)文集[C];1996年
相關(guān)博士學(xué)位論文 前10條
1 程大偉;單變量黃土結(jié)構(gòu)勢參數(shù)及其與增濕變形系數(shù)、振陷系數(shù)關(guān)系研究[D];西北農(nóng)林科技大學(xué);2014年
2 夏旺民;黃土彈塑性損傷本構(gòu)模型及工程應(yīng)用研究[D];西安理工大學(xué);2005年
3 馬棟和;黃土公路邊坡坡面沖刷的水—土力學(xué)耦合機(jī)制及模型研究[D];吉林大學(xué);2012年
4 姚濤;基于三軸土樣變形數(shù)字圖像測量的黃土變形和強(qiáng)度研究[D];大連理工大學(xué);2008年
5 林斌;考慮損傷效應(yīng)的黃土流變模型研究[D];長安大學(xué);2005年
6 李宏儒;結(jié)構(gòu)性黃土破損變形發(fā)展演化特性的研究[D];西安理工大學(xué);2009年
7 何青峰;延安Q_2黃土的力學(xué)及流變特性研究[D];長安大學(xué);2008年
8 劉海松;考慮沉積環(huán)境和應(yīng)力歷史的黃土力學(xué)特性研究[D];長安大學(xué);2008年
9 鄧津;黃土微觀結(jié)構(gòu)的區(qū)域成土環(huán)境與震害機(jī)理研究[D];蘭州大學(xué);2009年
10 胡再強(qiáng);黃土結(jié)構(gòu)性模型及黃土渠道的浸水變形試驗(yàn)與數(shù)值分析[D];西安理工大學(xué);2000年
相關(guān)碩士學(xué)位論文 前10條
1 楊朝旭;壓實(shí)黃土強(qiáng)度和變形各向異性試驗(yàn)研究[D];西安建筑科技大學(xué);2015年
2 趙亞楠;基于損傷理論的黃土及黃土邊坡漸進(jìn)破壞研究[D];西北農(nóng)林科技大學(xué);2015年
3 呂萌;山西省黃土崩塌地質(zhì)災(zāi)害的現(xiàn)狀及水敏感性分析[D];太原理工大學(xué);2016年
4 李小波;黃土暗穴對公路的危害及其致災(zāi)機(jī)理研究[D];長安大學(xué);2004年
5 袁仁愛;銅延一級公路黃土滑坡穩(wěn)定性分析與評價(jià)[D];西安科技大學(xué);2006年
6 郭靖;中國典型黃土結(jié)構(gòu)性試驗(yàn)研究[D];西北農(nóng)林科技大學(xué);2009年
7 楊重存;黃土固化技術(shù)在公路工程中的應(yīng)用及試驗(yàn)研究[D];長安大學(xué);2000年
8 駱亞生;中國典型黃土動(dòng)力特性及其參數(shù)的試驗(yàn)分析[D];西安理工大學(xué);2000年
9 李濱;晉西黃土暗穴成因及其對公路危害研究[D];長安大學(xué);2006年
10 胡仲有;不同地區(qū)黃土的動(dòng)力特性及其結(jié)構(gòu)性研究[D];西北農(nóng)林科技大學(xué);2008年
,本文編號:2438964
本文鏈接:http://www.sikaile.net/kejilunwen/diqiudizhi/2438964.html