中文摘要：

近年来,随着全球能源消耗的增加,对新能源的开发和利用日益重要。地热资源作为一种清洁环保的新能源已经开始引起广泛的关注,对岩土材料的热性质研究也逐渐受到国内外学者的重视。土的热性质包括热传导系数、热扩散系数和比热容。其中,热传导系数作为其中最重要的性质,它不仅决定了热量在土体中的传播速度和土体温度场的分布,同时也是各种地热泵、能量桩等建筑热工结构设计中需要考虑的主要参数之一。首先介绍了土热传导系数的工程背景和研究意义,描述了土中的热量传播方式和类型,阐述了热传导系数的概念,并分析了土热传导系数的各种影响因素（含水率、密度、矿物成分、温度等）。在此基础上,总结了目前国内外土热传导系数模型的研究现状,并对各个模型的优缺点进行了简要的分析和评价。最后,提出了对土传导系数及模型研究的建议和展望。

英文摘要：

In recent years, the demand of exploiting and utilizing new resources is increasing significantly as the consumption of traditional energy resources increases. As a result, the study of thermal properties of geotechnical materials has drawn more attention because geothermal energy is a kind of clean, sustainable and renewable energy resource. Soil thermal property consists of thermal conductivity, thermal diffusivity and heat capacity. Thermal conductivity is the most important soil thermal property, and it not only determines the speed of heat conduction and temperature field in soils, but also is a primary design parameter for various kinds of geothermal heat pumps, geothermal energy piles and other geothermal related structures. The engineering background and research motivation of soil thermal conductivity is firstly introduced, and followed by the definition of soil thermal conductivity and the analysis of its influence factors including moisture content, density, mineral component, temperature, etc. Based on the literature review, the summary of soil thermal conductivity prediction models is also presented. Model assessments including the advantages, disadvantages and applicability of each model are also presented afterward. Finally, some recommendations and suggestions have been provided for future research regarding geothermal applications.