CAJ | 학술논문

利用长弧氙灯模拟太阳辐射，通过调节灯罩与土样间的高度产生不同的辐射强度，通过控制光照时间模仿自然环境中的日照状态，通过设定恒温、恒湿环境获得单因素的控制条件，对阳光辐射下原状膨胀土的湿-热耦合性状及降雨蒸发效应进行分析。研究结果表明：当太阳辐射、降雨等气象现象发生后，膨胀土水分迁移和温度变化呈现不同的状态，随着土体水分的往复迁移，浅层土体趋于破碎，疏松，在太阳辐射作用下，土体含水率变化幅度增加，从而进一步加剧土体裂隙的拓展。对于膨胀土，裂隙性和膨胀性是它内在的秉性，而大气作用是诱因，在大气与土壤之间的水分和能量交换过程中，膨胀土的工程性质逐渐发生改变。采用自制的太阳辐射模拟装置，针对大气作用下原状膨胀土的湿热耦合性状以及降雨蒸发效应展开分析，相关经验也可应用到其他土类的研究。针对膨胀土工程性质，可进一步开展太阳辐射对膨胀土水分迁移机制影响的量化分析。
이용장호선등모의태양복사，통과조절등조여토양간적고도산생불동적복사강도，통과공제광조시간모방자연배경중적일조상태，통과설정항온、항습배경획득단인소적공제조건，대양광복사하원상팽창토적습-열우합성상급강우증발효응진행분석。연구결과표명：당태양복사、강우등기상현상발생후，팽창토수분천이화온도변화정현불동적상태，수착토체수분적왕복천이，천층토체추우파쇄，소송，재태양복사작용하，토체함수솔변화폭도증가，종이진일보가극토체렬극적탁전。대우팽창토，렬극성화팽창성시타내재적병성，이대기작용시유인，재대기여토양지간적수분화능량교환과정중，팽창토적공정성질축점발생개변。채용자제적태양복사모의장치，침대대기작용하원상팽창토적습열우합성상이급강우증발효응전개분석，상관경험야가응용도기타토류적연구。침대팽창토공정성질，가진일보개전태양복사대팽창토수분천이궤제영향적양화분석。
Xenon long-arc lamp is used to simulate solar radiation. Deferent radiation intensities are acquired by adjusting lampshade height. Sunshine state is acquired by controlling the illumination time. Single factor controlling condition is achieved by constant temperature and humidity environment. Then, moisture-heat coupling behavior and rainfall-evaporation effect of undisturbed expansive soil sample in solar radiation are studied. When solar radiation and rainfall occur, the moisture migration and temperature variation present different states. With the to-and-fro moisture migration, the shallow soil tends to the fractured and loosened. In the solar radiation, the amplitude of moisture content variation increases, which aggravates the fissure development. To expansive soil, the characteristics of swelling and fissure are inner being, and atmospheric action is incentive. The behavior of expansive soil is changed gradually in the exchange progress of moisture and energy between atmospheric and soil. The simulating device on solar radiation is used to study the moisture-heat coupling behavior and rainfall-evaporation effect of undisturbed expansive soil. And the experience in research could be applied to the study of other soil types. In view of the engineering properties of expansive soil, the quantitative analysis of moisture migration mechanism of expansive soil could be further developed in the influence of solar radiation.