CAJ | 학술논문

为了研究裂隙膨胀土渗气规律，采用自行设计加工的气体渗透测试装置，对人工制备裂隙膨胀土试样进行渗气试验。结果表明：压实膨胀土中气体渗透符合达西定律；试样完全切开且未夹纸条时，试样中仍然存在贯通裂隙，此时气体渗透系数相比压实膨胀土试样中的渗透系数提高了1倍；土中裂隙的存在为气体运移提供便利通道，改变气体原有运移路径，形成“优势流”现象；对比达西理论和非达西理论分析结果，土体中出现贯通人工裂隙时，采用非达西理论分析更合适。
위료연구렬극팽창토삼기규률，채용자행설계가공적기체삼투측시장치，대인공제비렬극팽창토시양진행삼기시험。결과표명：압실팽창토중기체삼투부합체서정률；시양완전절개차미협지조시，시양중잉연존재관통렬극，차시기체삼투계수상비압실팽창토시양중적삼투계수제고료1배；토중렬극적존재위기체운이제공편리통도，개변기체원유운이로경，형성“우세류”현상；대비체서이론화비체서이론분석결과，토체중출현관통인공렬극시，채용비체서이론분석경합괄。
A series of gas permeability tests were carried out in order to study its permeability on expansive soil with artificial fissures using self-designed and made apparatus. The results show that Darcy's law expresses the gas flow in the compacted expansive soil. When the soil sample is cut up completely, there is still a penetrated fissure within it that makes the permeability coefficient doubles. The fissures change the original gas flow path providing a convenient channel for it flows, consequently the “gas preferential flow” phenomenon could be observed in the fissured expansive soil. Comparing the theoretical analysis results of Darcy with that of non-Darcy, it is indicated that the non-Darcy theory is better than Darcy theory to analyze the gas permeability when there are artificial fissures in the soil.