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  本文選題：非飽和土　切入點：滲透性　出處：《東華理工大學(xué)》2015年碩士論文

【摘要】：本文以江西省域范圍內(nèi)典型非飽和紅壤土雨水入滲特征為研究對象,在前人對降雨條件下土質(zhì)滑坡災(zāi)變機理、災(zāi)害處治措施的研究基礎(chǔ)上,結(jié)合非飽和土力學(xué)相關(guān)強度理論,探討了降雨工況下非飽和紅壤土滲透特性、各因素對非飽和紅壤土土—水特征曲線的影響效應(yīng)以及雨水入滲后非飽和紅壤土強度變化等科學(xué)問題,并在研究過程中設(shè)計了非飽和紅壤土滲透性試驗、非飽和紅壤土土—水特征試驗和非飽和紅壤土強度特性試驗,開展的具體研究工作如下:(1)利用自主設(shè)計的滲透性試驗裝置,開展了四組不同的非飽和紅壤土的滲透性試驗,分析了非飽和土含水率、干密度、滲透時間以及靜置時效等因素對非飽和紅壤土滲透特性的影響規(guī)律。(2)通過制備重塑紅壤土試樣,利用FLSY-10型應(yīng)力應(yīng)變控制式非飽和土三軸儀,實施了非飽和土土—水特征曲線試驗、分析了基質(zhì)吸力與含水量之間的關(guān)系、初始含水量(飽和度)和初始干密度對土—水特征曲線的影響規(guī)律,并在大量數(shù)據(jù)支撐的情況下繪制了土—水特征曲線,為進一步揭示非飽和紅壤土強度衰減規(guī)律奠定了理論基礎(chǔ)。(3)通過實施重塑紅壤土飽和、非飽和三軸試驗,結(jié)合前人研究成果,利用Origin軟件構(gòu)建了反應(yīng)非飽和狀態(tài)下基質(zhì)吸力與黏聚力之間關(guān)系的數(shù)學(xué)模型。(4)在前人研究成果的基礎(chǔ)上,參閱相關(guān)土質(zhì)滑坡災(zāi)害治理方面的資料提出了紅壤土質(zhì)邊坡防滑措施,探討了滑坡災(zāi)害防治應(yīng)急預(yù)案編寫的內(nèi)容、方式及基本框架,可為滑坡災(zāi)害防治提供參考。
[Abstract]:In this paper, the infiltration characteristics of Rain Water in typical unsaturated red loam in Jiangxi Province are studied. Based on the previous researches on the mechanism of soil landslide disaster and disaster treatment measures under rainfall, combined with the relevant strength theory of unsaturated soil mechanics, this paper studies the characteristics of Rain Water infiltration in typical unsaturated red loam soil in Jiangxi Province. The permeation characteristics of unsaturated red loam under rainfall condition, the effect of various factors on the soil-water characteristic curve of unsaturated red loam and the change of intensity of unsaturated red loam after Rain Water infiltration were discussed. In the course of the study, the permeability test of unsaturated red loam, the soil-water characteristic test of unsaturated red loam and the strength characteristic test of unsaturated red loam are designed. The specific research work is as follows: 1) using the self-designed penetrability test device. The permeability tests of four groups of unsaturated red loam were carried out, and the moisture content and dry density of unsaturated soil were analyzed. The influence of infiltration time and static aging on the permeability characteristics of unsaturated red loam. Through the preparation of remolded red soil samples, the FLSY-10 type stress strain control unsaturated soil triaxial instrument was used to control the permeability of unsaturated red loam. The experiment of unsaturated soil-water characteristic curve was carried out, and the relationship between matrix suction and water content was analyzed, and the influence of initial moisture content (saturation) and initial dry density on soil-water characteristic curve was analyzed. The soil-water characteristic curve is drawn under the condition of a large amount of data support, which lays a theoretical foundation for further revealing the intensity attenuation law of unsaturated red loam soil. The experiment of remolding saturated and unsaturated red loam soil through triaxial test is carried out. Combined with the previous research results, a mathematical model of the relationship between matrix suction and cohesion under reactive unsaturated state was constructed by using Origin software. In this paper, the anti-skid measures of red soil slope are put forward by referring to the relevant data of landslide disaster control, and the contents, methods and basic framework of the emergency plan for landslide prevention and control are discussed, which can provide reference for landslide disaster prevention and control.
【學(xué)位授予單位】：東華理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：P642.2

【參考文獻】

中國博士學(xué)位論文全文數(shù)據(jù)庫 前1條

1 溫銘生;哀牢山區(qū)降雨型滑坡預(yù)警理論與方法研究[D];北京交通大學(xué);2014年

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本文編號：1657962