现代地质2011，Vol.25Issue(6)：1187-1194,8.
影响北京地区粉质粘土和细砂的热导率因素统计分析
Statistical Analysis of Factors Affecting the Thermal Conductivity of Silty Clay and Fine Sand in Beijing Area
摘要
Abstract
With shortages of energy and increasing awareness of environmental protection, the limited resources of shallow underground space have been rapidly developed and utilized. It is very important to master the variation of thermal physical parameters of rock and soil for using limited underground thermal energy efficiently and reasonably. Based on the thermal physical properties test of rock and soil in the geological prospecting projects of Beijing plain shallow geothermal energy resources, this paper analyses statistically the factors affecting the thermal conductivity of the silty clay and fine sand. The statistical results show that the average thermal conductivity of silty clay is 1. 74 W/( m-K) , and the average thermal conductivity of fine sand is 1. 55 W/( nvK) and that the variation trend of these thermal conductivity rates is clear with the variation of the natural water content, natural density and porosity, with increasing water content the thermal conductivity decreases. The variation trends are listed as following;the thermal conductivity increases with increasing density;the thermal conductivity reduces with increasing porosity;the best thermal conductivity is of about 20% water content in silty clay and 15% in fine sand;because the differences of samples in geological structural position, sedimentary environment , sedimentary history, material composition of rock and soil and composition microstructure affect the com-bination of the heat transfer, the thermal conductivity and water content in different areas, even in the same areas , have different fitting equations but the same variation trend.关键词
粉质粘土/细砂/热物理性质/天然含水率/北京地区Key words
silty clay/fine sand/thermal physical property/rate of natural water content/Beijing area分类
天文与地球科学引用本文复制引用
栾英波,卫万顺,郑桂森,季鑫楠..影响北京地区粉质粘土和细砂的热导率因素统计分析[J].现代地质,2011,25(6):1187-1194,8.基金项目
北京市地质矿产勘查开发局"北京市优秀人才培养资助"计划项目(2010D00201100000) （2010D00201100000）
北京平原区浅层地温能资源地质勘查项目(2006-000-043289). （2006-000-043289）
