【作者】 孙秋；

【导师】 洪宝宁；

【作者基本信息】 河海大学 ， 岩土工程， 2007， 硕士

【摘要】 本文对现有微细结构测试系统和微细结构分析软件存在的不足进行了总结分析，并在此基础上，开展了全自动三维跟踪光学测试系统的研制和调试工作。运用改进后的微细结构测试系统进行了生态土的微细结构试验，观测了生态土在连续荷载作用下微细结构的变化情况，研究了结构特征参数变化规律，并与水泥土，粘性土的结构参数变化规律进行了对比分析；为了了解生态土的抗侵蚀性，通过化学溶蚀试验，研究了生态土发生化学反应的过程及微观结构参数变化的规律，从而解释和把握生态土基于微细观结构层次上的工程特性。论文主要内容如下： 1．在阅读大量国内外微细结构定量分析方法和实验手段相关文献的基础上，将微细结构静态光学测试系统，改造为岩土微细结构全自动三维跟踪光学测试系统，使之可进行多种工况下土体微细结构的试验研究。 2．利用小波变换的多分辨率技术，解决了放大倍数与景深问题，提高了获取结构特征参数的精度和可靠性。 3．借助改造后的岩土微细结构全自动三维跟踪光学测试系统，对生态土的原状样和扰动样分别进行单轴荷载和三轴荷载作用下的微细结构试验，得到了土样在连续荷载作用下的微细结构量化信息，寻求特征参数的变化规律，及其宏观力学的响应关系。 4．对比生态土、水泥土和粘性土连续加载过程中微观结构特征参数演化规律。 5．定量分析受化学溶蚀的生态土的质量损失率，离子种类、质量变化，推断化学反应过程的离子方程式。 6．通过定量分析了生态土化学溶蚀前后的微细结构的变化，研究了生态土化学溶蚀下的微细结构演化规律及其对土体宏观力学特性的影响。更多还原

【Abstract】 Abstract: Based on summarization and analysis on the lack of microstructures test system and analyse software, the text developed the development and debugging of Autometic 3D Tracking Optic Test System (ATOTS). By means of the ameliorative microstructure test system, experimentalized microstructures of Smart Soil, observed the diversification of microstructures of Smart Soil under continuous loads, investigated the change law of configuration character parameter and be a contrast to the change law of configuration parameter of soil cement and clayey soil. In order to know the resist of Smart Soil, investigated the chemical reaction process of Smart Soil and the parameter change law of microstructure by means of the chemical erosion test, thereby the engineering characteristic of Smart Soil in the microstructure level was explained and known. The major coverage of this paper as follows:1. Based on reading a great deal of literature relative to the quantitative analysis method of microstructure and experiment means at home and abroad, the micro structural static optical test system was evolved into ATOTS, by doing so, multi-condition researches of soil microstructure can be taken.2. Figured out the problem of magnification times and depth of field by means of high resolving power technology based on wavelet transform, and improved the accuracy and reliability of structural characteristic parameter.3. By using reconstructed ATOTS of soil microstructures, test the undisturbed and disturbed specimen of the microstructures of Smart Soil under uniaxial load and three axial load respectively, gained the quantitative information of microstructure of soil specimen under continuous loads, seek the change law of characteristic parameter, and response relation of macroscopical mechanics.4. Contrasted the characteristic parameter evolution law of microstructure of Smart Soil under continuous loads with cement soil and clayey soil.5. Quantitative analyzed the mass loss rate, ionic species, quality change of Smart Soil under chemical erosion actions, deduced the ionic equation of chemical response process.6. By quantitative analyzing the transformation of the microstructure of Smart Soil before and after chemical erosion, investigated the evolution law of the microstructure of Smart Soil under chemical erosion and its infection relative to the macroscopical mechanics characteristic of soil.更多还原