【摘要】：隨著我國(guó)交通事業(yè)的發(fā)展,在凍土地區(qū)修建的公路越來(lái)越多,而工程修筑不可避免的對(duì)多年凍土產(chǎn)生擾動(dòng),導(dǎo)致多年凍土融化,發(fā)生道路凍脹和融沉等病害,因此在凍土地區(qū)修建構(gòu)筑物時(shí),需要進(jìn)行詳細(xì)的工程勘察。電阻率法很好適用于凍土地區(qū)勘察,研究?jī)鐾恋碾娮杪侍匦詫?duì)于認(rèn)清凍土的電性特征及根據(jù)勘探成果反演成像對(duì)凍土地區(qū)勘探測(cè)試結(jié)果做出較合理的判斷與評(píng)估具有重要意義。本文通過(guò)凍土電阻率模型的推導(dǎo)建立和室內(nèi)試驗(yàn)研究,對(duì)凍土電阻率特性進(jìn)行深入研究,將凍土電阻率試驗(yàn)結(jié)果和理論推導(dǎo)的凍土電阻率模型對(duì)比,驗(yàn)證凍土電阻率模型的合理性,主要內(nèi)容如下：首先,在已有的電阻率模型基礎(chǔ)上,結(jié)合凍土特性,將凍土導(dǎo)電通道分為土顆粒、冰水混合物及土顆粒.冰水混合物三種導(dǎo)電通道,建立凍土導(dǎo)電模型,根據(jù)導(dǎo)電模型推導(dǎo)凍土電阻率模型,并理論分析凍土電阻率影響因素。其次,根據(jù)土電阻率測(cè)試方法和凍土特性,確定凍土電阻率室內(nèi)試驗(yàn)測(cè)試儀器、方法及方案；對(duì)不同溫度、不同含水率、不同干密度及不同土類(lèi)的凍土電阻率進(jìn)行試驗(yàn),分析溫度、含水率、干密度及土的種類(lèi)對(duì)凍土電阻率影響,揭示各因素對(duì)凍土電阻率影響機(jī)理。最后,將凍土電阻率試驗(yàn)結(jié)果和凍土電阻率模型進(jìn)行對(duì)比,驗(yàn)證了凍土電阻率模型的合理性。
[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.
【學(xué)位授予單位】：東北林業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：U416.168;U412.221

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相關(guān)期刊論文 前1條

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本文編號(hào)：2276860