黄河冲积平原(鲁西北)浅层岩土体综合热导率研究--以临清市为例

Study on comprehensive thermal conductivity of shallow rock and soil in alluvial plain of the Yellow River(Northwest Shandong)--Taking Linqing City as an example

现场热响应试验测试是获取换热深度内岩土体综合热导率最直接的方法,能够快速、直观的体现岩土体换热能力。通过分析研究临清市钻探获取的地质、水文地质参数,结合热响应试验成果资料,分析在一定条件下岩土体综合热导率与初始地温、含水层厚度、渗流速度、地下水位埋深等相互关系,发现综合热导率与初始地温、含水层厚度、渗流速度正相关,与地下水位埋深反相关。在黄河冲积平原(鲁西北)地埋管地源热泵系统开发利用应选择初始地温较高、含水层厚度大(古河道带)、地下水位埋深浅、地下水径流条件好的区域。

The field thermal response test is the most direct method to obtain the comprehensive thermal conductivity of rock and soil within the heat transfer depth,which quickly and directly reflects the heat transfer capacity of rock and soil.Based on the analysis of geological and hydrogeological parameters obtained through drilling in Linqing City,the results of the thermal response test,and the relationship between comprehensive thermal conductivity of rock and soil mass and initial ground temperature,aquifer thickness,seepage velocity and groundwater depth under certain conditions,this paper finds that the comprehensive thermal conductivity is positively correlated with initial ground temperature,aquifer thickness and seepage velocity,but negatively correlated with groundwater depth.In the alluvial plain of the Yellow River(northwestern Shandong Province),the development and utilization of ground source heat pump system should select the area with high initial ground temperature,large aquifer thickness(ancient river belt),shallow groundwater level and good groundwater runoff conditions.