本文選題：花崗巖殘積土 + 力學(xué)特性　； 參考：《廈門大學(xué)》2014年碩士論文

【摘要】：我國東南沿海經(jīng)濟(jì)開放區(qū)主要分布在花崗巖風(fēng)化殼上,該區(qū)域殘積土厚度較大,其中在閩粵沿海地區(qū)一般為20-35m。福建省地處東南沿海,位于亞熱帶東南季風(fēng)氣候區(qū),中低山和丘陵占全省面積的80%,氣候濕熱,臺風(fēng)暴雨頻繁,降雨集中,巖土滲流強(qiáng)度大,丘陵山地風(fēng)化與侵蝕作用強(qiáng)烈,導(dǎo)致花崗巖殘積土廣泛覆蓋,其中50%分布在閩東南丘陵、沿海平原等地,其中廈門地區(qū)最厚達(dá)50-7m。因此,花崗巖殘積土在東南部省份普遍存在,工程中所遇的山地、丘陵、剝蝕準(zhǔn)平原上都分布著殘積土,是大部分工程建設(shè)的地基基礎(chǔ)和地質(zhì)環(huán)境重要介質(zhì)。福建省正在實(shí)施海峽西岸經(jīng)濟(jì)區(qū)發(fā)展戰(zhàn)略,填海造地、高速公路和鐵路、海港碼頭、福州地鐵、廈門地鐵等巖土工程空前繁榮。因此,東南沿海地區(qū)殘積土安全穩(wěn)定性、工程力學(xué)特性和降雨引發(fā)滑坡等地質(zhì)災(zāi)害規(guī)律等研究是福建省實(shí)現(xiàn)新一輪跨越式發(fā)展中面臨的重要而緊迫的研究課題,對預(yù)防控制重大巖土工程事故和滑坡等嚴(yán)重地質(zhì)災(zāi)害具有重大的理論和現(xiàn)實(shí)意義。 論文以福建省自然科學(xué)基金項(xiàng)目“強(qiáng)降雨條件下松散巖土體發(fā)生滑坡、泥石流地質(zhì)災(zāi)害的相態(tài)演變機(jī)理研究”為依托,以廈門地區(qū)分布廣泛的花崗巖殘積土為代表性土樣,通過室內(nèi)試驗(yàn),降雨滑坡模擬試驗(yàn)、巖土細(xì)觀檢測分析、巖土細(xì)觀成像分析與數(shù)字處理等研究技術(shù)手段,主要開展以下研究工作： 1.通過查閱國內(nèi)外文獻(xiàn),總結(jié)分析了巖土含水率對巖土體力學(xué)性質(zhì)的關(guān)系及其作用機(jī)理,為制定該試驗(yàn)研究方案提供基本依據(jù)和參考。 2.采集廈門地區(qū)花崗巖殘積土為代表性土樣,配制成5種不同含水率的試樣,通過直剪試驗(yàn),測試試樣含水率與內(nèi)部粘聚力、內(nèi)摩擦角的相互關(guān)系,從而揭示含水率對殘積土力學(xué)性能的影響規(guī)律。 3.以土體邊坡坡度、降雨強(qiáng)度為控制變量,設(shè)計了16種降雨滑坡模擬試驗(yàn)方案。在不同降雨強(qiáng)度條件下對不同角度的土體邊坡模型進(jìn)行了降雨滑坡模擬試驗(yàn),并對試驗(yàn)結(jié)果進(jìn)行統(tǒng)計對比分析,從宏觀角度對土體失穩(wěn)破壞的規(guī)律進(jìn)行探討,并在此基礎(chǔ)上,總結(jié)目前土體失穩(wěn)破壞的原型試驗(yàn)及調(diào)查結(jié)果,驗(yàn)證模型試驗(yàn)結(jié)果的合理性； 4、采用巖土細(xì)觀變化圖像采集和分析系統(tǒng),采集大量細(xì)觀變化圖像和照片,通過圖像處理技術(shù),結(jié)合計算機(jī)語言編寫圖像處理程序,進(jìn)行計算和處理,獲得土體顆粒團(tuán)的細(xì)觀運(yùn)動數(shù)據(jù)信息和運(yùn)動軌跡,經(jīng)過統(tǒng)計對比分析,從細(xì)觀角度揭示降雨滑坡土體失穩(wěn)破壞的細(xì)觀演變規(guī)律,揭示土體失穩(wěn)宏觀破壞形式與細(xì)觀運(yùn)動演變的之間的關(guān)系。
[Abstract]:The open area of southeast coastal economy of China mainly distributes on the weathering crust of granite, and the thickness of residual soil in this area is relatively large, which is 20-35 m in the coastal area of Fujian and Guangdong. Fujian Province is located in the southeast coast, located in the subtropical southeast monsoon climate area. The middle and low mountains and hills account for 80 percent of the province's area. The climate is humid and hot, the typhoon rainstorm is frequent, the rainfall is concentrated, the seepage intensity of rock and soil is large, and the weathering and erosion of hilly areas are strong. As a result, granite residual soil is widely covered, 50% of which are distributed in hilly areas of southeast Fujian and coastal plains, among which the thickest is 50-7 m in Xiamen area. Therefore, granite residual soil is widely found in southeast provinces. The mountainous, hilly and denuded quasi plain, which are encountered in the engineering, are all distributed in the residual soil, which is an important medium for the foundation and geological environment of most projects. Fujian Province is implementing the development strategy of the economic zone on the west side of the strait, reclamation, highway and railway, port wharf, Fuzhou subway, Xiamen subway and other geotechnical engineering prosperity unprecedented. Therefore, the research on the safety and stability of residual soil, engineering mechanical properties and landslide induced by rainfall in southeast coastal area is an important and urgent research topic in Fujian province to realize a new round of leapfrog development. It is of great theoretical and practical significance to prevent and control serious geological disasters such as major geotechnical accidents and landslides. Based on the project of Fujian Natural Science Foundation, "study on the mechanism of phase evolution of landslide in loose rock mass and geological hazard of debris flow under heavy rainfall", the paper takes granite residual soil widely distributed in Xiamen area as representative soil sample. Through laboratory test, rainfall landslide simulation test, geotechnical mesoscopic detection and analysis, geotechnical mesoscopic imaging analysis and digital processing, the main research work is as follows: 1. By consulting the literature at home and abroad, this paper summarizes and analyzes the relationship between soil moisture content and the physical properties of rock and soil and its mechanism of action, which provides the basic basis and reference for the formulation of the experimental research scheme. 2. The granite residual soil in Xiamen area was collected as the representative soil sample, and five samples with different moisture content were prepared. The relationship between moisture content and internal cohesion, internal friction angle was tested by direct shear test. Thus, the effect of moisture content on the mechanical properties of residual soil is revealed. 3. Taking slope of soil slope and rainfall intensity as control variables, 16 kinds of rainfall landslide simulation test schemes were designed. Under the condition of different rainfall intensity, the model of soil slope with different angles is simulated, and the statistical analysis of the test results is carried out, and the law of soil instability and failure is discussed from the macroscopic point of view, and on the basis of this, The prototype test and investigation results of soil failure are summarized to verify the rationality of the model test results. 4. A large number of images and photographs are collected by using the geotechnical mesoscopic change image acquisition and analysis system. Through image processing technology and computer language, the image processing program is compiled to calculate and process the mesoscopic motion data and track of soil particles. From the view of meso, the law of microcosmic evolution of soil mass instability and failure of rainfall landslide is revealed, and the relationship between the macroscopic failure form of soil mass instability and the evolution of mesoscopic motion is revealed.
【學(xué)位授予單位】：廈門大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：P642.22;TU43

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 陳禎;;土壤含水量、容重、光譜反射率之間相伴變化關(guān)系研究[J];安徽農(nóng)業(yè)科學(xué);2011年17期

2 仵彥卿;地下水與地質(zhì)災(zāi)害[J];地下空間;1999年04期

3 邊加敏;王保田;;含水量對非飽和土抗剪強(qiáng)度參數(shù)的影響研究[J];地下空間與工程學(xué)報;2011年01期

4 王清,王鳳艷,肖樹芳;土微觀結(jié)構(gòu)特征的定量研究及其在工程中的應(yīng)用[J];成都理工學(xué)院學(xué)報;2001年02期

5 印文東;三軸剪切試驗(yàn)中孔隙水壓力的特性探討[J];城市道橋與防洪;2005年03期

6 趙景波;邵天杰;�？〗�;;西安白鹿塬黃土滲透性與含水條件[J];地理研究;2009年05期

7 周萃英;土體微觀結(jié)構(gòu)研究與土力學(xué)的發(fā)展方向——若干進(jìn)展與思考[J];地球科學(xué);2000年02期

8 簡文星;殷坤龍;羅沖;姚林林;張超;;三峽庫區(qū)萬州安樂寺滑坡滑帶特征[J];地球科學(xué)(中國地質(zhì)大學(xué)學(xué)報);2008年05期

9 畢慶濤;姜國萍;丁樹云;;含水量對紅粘土抗剪強(qiáng)度的影響[J];地球與環(huán)境;2005年S1期

10 嚴(yán)春杰,唐輝明,孫云志;利用掃描電鏡和X射線衍射儀對滑坡滑帶土的研究[J];地質(zhì)科技情報;2001年04期

相關(guān)博士學(xué)位論文 前5條

1 蘇志滿;泥石流災(zāi)變控制與模型化分析方法[D];中南大學(xué);2011年

2 賀匯文;秦嶺變質(zhì)巖區(qū)巖體結(jié)構(gòu)特征及公路邊坡穩(wěn)定性研究[D];長安大學(xué);2009年

3 何淑軍;陜西寶雞市渭濱區(qū)地質(zhì)災(zāi)害風(fēng)險評估研究[D];中國地質(zhì)科學(xué)院;2009年

4 邱恩喜;道路軟巖邊坡設(shè)計研究[D];西南交通大學(xué);2009年

5 繆海波;三峽庫區(qū)侏羅系紅層滑坡變形破壞機(jī)理與預(yù)測預(yù)報研究[D];中國地質(zhì)大學(xué);2012年

，

本文編號：2011417