摘要
近年来世界各地广泛发展地下能源工程,地热能源的开发日益重要,而准确的获得土壤的热物性参数是开展地下能源工程的先决条件。现阶段测量土壤热物性参数的方法主要分为室内和现场原位测试,室内实验有成本低、测试速度快等优点,但是由于脱离现场环境,测量精度低;现场原位测试基于土体的现场环境,能够综合分析土性、地下水等因素的影响,对地下能源工程的开展具有很大的指导意义、但存在耗时长,精度低等问题,而热传导CPTU探头克服了室内和原位测试的一些缺点,可以跟快速精确的得到土体热力学性质。本文总结和具体分析了现阶段热传导CPTU探头的测试理论和实验装置的发展,并指出了不足和对热传导CPTU探头测试方法的发展展望。
With the growth of recent geothermal engineering applications,the development of energy is more important.The ability to accurately and easily quantify soil thermal properties is precondition to the engineering applications.Soil thermal properties are generally evaluated by laboratory and in-situ tests.The determination of thermal properties in the laboratory requires soil sample extraction,transportation,and careful handling which is generally quit costly and time consuming.In-situ tests,instead,allow determining the soil thermal properties under actual field conditions.The result of tests,which includes hydrologic condition and geological conditions,is valuable to geothermal engineering applications,but the main drawback of in-situ methods is the long time,and the result of testing is not precision enough.But the thermal conductivity penetration testing overcomes most of the drawbacks observed in current in-situ or laboratory techniques used to determine the thermal properties of soil.In this paper,thermal conductivity penetration testing has been reviewed and analyzed,and some deficiency and expectation of testing have been proposed.
作者
张文伟
蔡国军
刘松玉
Zhang Wenwei;Cai Guojun;Liu Songyu(Institute of Geotechnical Engineering,Southeast University,Nanjing 210096,P.R. China;Jiangsu Key Laboratory of Urban Underground Engineering and Environmental Safety,Southeast University,Nanjing 210096,P.R. China)
出处
《地下空间与工程学报》
CSCD
北大核心
2018年第S2期737-744,共8页
Chinese Journal of Underground Space and Engineering
基金
国家重点研发计划项目课题(2016YFC0800200)
国家自然科学基金(41672294
41877231)
关键词
热传导系数
原位测试
研究现状
展望
thermal conductivity
in-situ tests
review
expectation
