【摘要】 河南省浅层地温能资源具有分布广泛、资源量丰富、开发利用方便等特点,发展前景广阔。通过对河南省主要城市的地质、水文地质条件和岩土体结构特征等浅层地温能赋存特征的分析,采用数理统计和对比分析等综合研究的方法,对比研究了不同地貌类型城市200m以浅的岩土体热物性特征、浅层地温场分布特征和岩土热响应特征等的异同及其分布与变化规律。结果显示:河南省主要城市浅层地温能的赋存层位主要为第四系及新近系上部的各类松散堆积物,这些松散的堆积物和储存于其孔隙内的地下水为浅层地温能的载体;岩土导热系数会随着孔隙率的增加而减小,随岩性颗粒变粗而增大;城市地层综合导热系数和换热能力与地下水径流条件呈正相关;位于盆地和山前地带水文地质条件优越的城市或地段,浅层地温能开发利用宜采用地下水换热方式,松散堆积物厚度较大且以细粒相沉积为主的城市或地段,宜采用竖直地埋管换热方式。更多还原

【Abstract】 The shallow geothermal energy resources in Henan Province are characterized by wide distribution, abundant resources and convenient exploitation and utilization. A great deal of geological data and test data are studied by means of comprehensive research, such as mathematical statistics and comparative analysis. Based on the analysis of the occurrence characteristics of shallow geothermal energy, such as geological and hydrogeological conditions, geotechnical structure characteristics of rock and soil mass in major cities of Henan Province, the authors compare and study the similarities and differences of the thermal characteristics of rock and soil mass at above 200 m depth, the distribution characteristics of shallow geothermal field and the Geotechnical thermal response characteristics between cities with different geomorphological types, as well as their distribution and variation law. The results show that the occurrence horizon of shallow geothermal energy in major cities of Henan Province is mainly composed of various loose deposits in the upper part of the Quaternary and Neogene Systems.These loose deposits and groundwater stored in the pores are carriers of shallow geothermal energy; the thermal conductivity of rock and soil decreases with the increase of porosity and increases with the thickening of lithologic particles; the comprehensive thermal conductivity and heat transfer capacity of urban strata are positively correlated with the groundwater runoff conditions.For cities or regions located in basins and piedmont areas with superior hydrogeological conditions, underground water heat transfer should be adopted in the exploitation and utilization of shallow geothermal energy; buried vertical pipe heat transfer should be adopted for cities or regions with thick loose deposits and mainly fine-grained facies sedimentation.更多还原