非饱和红壤土降雨入渗与强度变化特征试验研究

发布时间：2018-03-24 10:44

  本文选题：非饱和土　切入点：渗透性　出处：《东华理工大学》2015年硕士论文

【摘要】：本文以江西省域范围内典型非饱和红壤土雨水入渗特征为研究对象,在前人对降雨条件下土质滑坡灾变机理、灾害处治措施的研究基础上,结合非饱和土力学相关强度理论,探讨了降雨工况下非饱和红壤土渗透特性、各因素对非饱和红壤土土—水特征曲线的影响效应以及雨水入渗后非饱和红壤土强度变化等科学问题,并在研究过程中设计了非饱和红壤土渗透性试验、非饱和红壤土土—水特征试验和非饱和红壤土强度特性试验,开展的具体研究工作如下:(1)利用自主设计的渗透性试验装置,开展了四组不同的非饱和红壤土的渗透性试验,分析了非饱和土含水率、干密度、渗透时间以及静置时效等因素对非饱和红壤土渗透特性的影响规律。(2)通过制备重塑红壤土试样,利用FLSY-10型应力应变控制式非饱和土三轴仪,实施了非饱和土土—水特征曲线试验、分析了基质吸力与含水量之间的关系、初始含水量(饱和度)和初始干密度对土—水特征曲线的影响规律,并在大量数据支撑的情况下绘制了土—水特征曲线,为进一步揭示非饱和红壤土强度衰减规律奠定了理论基础。(3)通过实施重塑红壤土饱和、非饱和三轴试验,结合前人研究成果,利用Origin软件构建了反应非饱和状态下基质吸力与黏聚力之间关系的数学模型。(4)在前人研究成果的基础上,参阅相关土质滑坡灾害治理方面的资料提出了红壤土质边坡防滑措施,探讨了滑坡灾害防治应急预案编写的内容、方式及基本框架,可为滑坡灾害防治提供参考。
[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.
【学位授予单位】：东华理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P642.2

【参考文献】

中国博士学位论文全文数据库 前1条

1 温铭生;哀牢山区降雨型滑坡预警理论与方法研究[D];北京交通大学;2014年

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本文编号：1657962