冻土电阻率模型及其试验研究
发布时间：2018-10-17 13:49
【摘要】：随着我国交通事业的发展,在冻土地区修建的公路越来越多,而工程修筑不可避免的对多年冻土产生扰动,导致多年冻土融化,发生道路冻胀和融沉等病害,因此在冻土地区修建构筑物时,需要进行详细的工程勘察。电阻率法很好适用于冻土地区勘察,研究冻土的电阻率特性对于认清冻土的电性特征及根据勘探成果反演成像对冻土地区勘探测试结果做出较合理的判断与评估具有重要意义。本文通过冻土电阻率模型的推导建立和室内试验研究,对冻土电阻率特性进行深入研究,将冻土电阻率试验结果和理论推导的冻土电阻率模型对比,验证冻土电阻率模型的合理性,主要内容如下：首先,在已有的电阻率模型基础上,结合冻土特性,将冻土导电通道分为土颗粒、冰水混合物及土颗粒.冰水混合物三种导电通道,建立冻土导电模型,根据导电模型推导冻土电阻率模型,并理论分析冻土电阻率影响因素。其次,根据土电阻率测试方法和冻土特性,确定冻土电阻率室内试验测试仪器、方法及方案；对不同温度、不同含水率、不同干密度及不同土类的冻土电阻率进行试验,分析温度、含水率、干密度及土的种类对冻土电阻率影响,揭示各因素对冻土电阻率影响机理。最后,将冻土电阻率试验结果和冻土电阻率模型进行对比,验证了冻土电阻率模型的合理性。
[Abstract]:With the development of transportation in our country, more and more highways are built in frozen soil areas, and the engineering construction inevitably disturbs permafrost, which leads to thawing of permafrost, causing frost heaving and thawing of roads, etc. Therefore, detailed engineering investigation is needed when building structures in permafrost regions. The resistivity method is very suitable for the investigation of frozen soil area. The study of resistivity characteristics of frozen soil is of great significance for recognizing the electrical characteristics of frozen soil and making reasonable judgment and evaluation of the result of exploration and test in frozen soil area based on the inversion imaging of exploration results. In this paper, through the derivation of the resistivity model of frozen soil and the experimental study in laboratory, the resistivity characteristics of frozen soil are deeply studied, and the results of resistivity test of frozen soil are compared with the resistivity model of frozen soil derived in theory. The main contents are as follows: firstly, based on the existing resistivity model and the characteristics of frozen soil, the conductive channel of frozen soil is divided into soil particle, ice water mixture and soil particle. Three kinds of conductive channels of ice water mixture were used to establish the conductive model of frozen soil. According to the model, the resistivity model of frozen soil was deduced, and the influencing factors of resistivity of frozen soil were analyzed theoretically. Secondly, according to the resistivity test method and characteristics of frozen soil, the laboratory test instrument, method and scheme of frozen soil resistivity are determined, and the resistivity of frozen soil is tested at different temperature, different moisture content, different dry density and different soil type. The effects of temperature, moisture content, dry density and soil type on the resistivity of frozen soil are analyzed, and the influence mechanism of each factor on the resistivity of frozen soil is revealed. Finally, the rationality of the frozen soil resistivity model is verified by comparing the results of the frozen soil resistivity test with the frozen soil resistivity model.
【学位授予单位】：东北林业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U416.168;U412.221
本文编号：2276860
[Abstract]:With the development of transportation in our country, more and more highways are built in frozen soil areas, and the engineering construction inevitably disturbs permafrost, which leads to thawing of permafrost, causing frost heaving and thawing of roads, etc. Therefore, detailed engineering investigation is needed when building structures in permafrost regions. The resistivity method is very suitable for the investigation of frozen soil area. The study of resistivity characteristics of frozen soil is of great significance for recognizing the electrical characteristics of frozen soil and making reasonable judgment and evaluation of the result of exploration and test in frozen soil area based on the inversion imaging of exploration results. In this paper, through the derivation of the resistivity model of frozen soil and the experimental study in laboratory, the resistivity characteristics of frozen soil are deeply studied, and the results of resistivity test of frozen soil are compared with the resistivity model of frozen soil derived in theory. The main contents are as follows: firstly, based on the existing resistivity model and the characteristics of frozen soil, the conductive channel of frozen soil is divided into soil particle, ice water mixture and soil particle. Three kinds of conductive channels of ice water mixture were used to establish the conductive model of frozen soil. According to the model, the resistivity model of frozen soil was deduced, and the influencing factors of resistivity of frozen soil were analyzed theoretically. Secondly, according to the resistivity test method and characteristics of frozen soil, the laboratory test instrument, method and scheme of frozen soil resistivity are determined, and the resistivity of frozen soil is tested at different temperature, different moisture content, different dry density and different soil type. The effects of temperature, moisture content, dry density and soil type on the resistivity of frozen soil are analyzed, and the influence mechanism of each factor on the resistivity of frozen soil is revealed. Finally, the rationality of the frozen soil resistivity model is verified by comparing the results of the frozen soil resistivity test with the frozen soil resistivity model.
【学位授予单位】：东北林业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U416.168;U412.221
【参考文献】
相关期刊论文 前1条
1 严明良;电阻率法在岩土工程中的应用[J];水利水电科技进展;2004年02期
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