【摘要】：為研究不同土樣類型對(duì)土壤熱濕遷移規(guī)律的影響,搭建了一維土柱實(shí)驗(yàn)臺(tái),選取礫砂、粗砂、中砂、細(xì)砂、粉砂、黏土6種土樣類型作為研究對(duì)象,分別進(jìn)行了熱濕遷移規(guī)律的實(shí)驗(yàn)研究。實(shí)驗(yàn)結(jié)果表明:在初始含水率為5%、熱源溫度為30℃、擊實(shí)功為20J實(shí)驗(yàn)工況下,6種土樣在加熱過(guò)程中熱遷移表現(xiàn)出差異性,粉砂、細(xì)砂和黏土熱遷移效果最佳,礫砂和粗砂次之,中砂熱遷移效果最差。在熱影響半徑內(nèi),土體中熱量的傳導(dǎo)與含水率的傳遞相互作用,互為驅(qū)動(dòng):愈靠近熱源,溫度梯度愈成為水分在土樣中運(yùn)移的主要驅(qū)動(dòng)力;愈遠(yuǎn)離熱源,濕度梯度愈成為溫度傳導(dǎo)的主要驅(qū)動(dòng)力。得到的不同土樣類型在熱濕遷移規(guī)律上的差異性及非飽和土樣熱濕遷移驅(qū)動(dòng)機(jī)理可以為解決工程中所遇到的不同土質(zhì)熱濕遷移問(wèn)題提供一定的參考依據(jù)。
[Abstract]:In order to study the effect of different soil sample types on soil heat and moisture migration, a one-dimensional soil column test bench was set up. Six types of soil samples, gravel, coarse sand, medium sand, fine sand, silt and clay, were selected as research objects. The experimental study on the laws of heat and moisture transfer was carried out respectively. The experimental results show that under the conditions of initial moisture content of 5, heat source temperature of 30 鈩，

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