垂直地埋管换热器周围非饱和土壤的特性对埋管换热具有重要影响,目前地埋管换热器设计中多假设岩土为均匀介质,并未深入考虑非饱和岩土对埋管换热的影响。基于岩土的非饱和特性,通过数值模拟,对比分析岩土非饱和特性下温度响应的变化,为地埋管换热器设计提供更为准确模型。 The characteristics of unsaturated soils around vertical borehole heat exchangers have an important influence on the heat exchange and heat transfer of buried pipes. At present, the design of buried heat exchangers is mostly based on the assumption that rock and soil are homogeneous media, and the influence of unsaturated soil on buried pipe Effect of heat exchange. Based on the unsaturated characteristics of geomaterials, the change of temperature response under non-saturation of geomaterials is compared by numerical simulation to provide a more accurate model for the design of buried pipe heat exchangers.