CAJ | 학술논문

湿陷性黄土模型试验相似材料一直是地质力学模型试验相似材料研究的瓶颈，限制着湿陷性黄土地区模型试验的应用。采用空中自由下落法，通过大量配比试验，成功研制湿陷性黄土模型试验相似材料，该材料选用重晶石粉和砂作为无黏性材料，工业盐、石膏和膨润土作为黏结性材料，加水均匀拌合，润湿24 h后采用空中自由下落法制成试样，50℃恒温条件下烘干试样，模拟风成黄土的沉积方式和形成条件。通过湿陷试验，得到该相似材料具有和天然湿陷性黄土相似的湿陷特征，浸水产生强烈湿陷；通过直剪试验，得到该材料的强度参数也与天然黄土相似，而且可调节的容重范围广，是一种比较理想的湿陷性黄土模型试验相似材料。
습함성황토모형시험상사재료일직시지질역학모형시험상사재료연구적병경，한제착습함성황토지구모형시험적응용。채용공중자유하락법，통과대량배비시험，성공연제습함성황토모형시험상사재료，해재료선용중정석분화사작위무점성재료，공업염、석고화팽윤토작위점결성재료，가수균균반합，윤습24 h후채용공중자유하락법제성시양，50℃항온조건하홍간시양，모의풍성황토적침적방식화형성조건。통과습함시험，득도해상사재료구유화천연습함성황토상사적습함특정，침수산생강렬습함；통과직전시험，득도해재료적강도삼수야여천연황토상사，이차가조절적용중범위엄，시일충비교이상적습함성황토모형시험상사재료。
The model test material of collapsible loess is the bottleneck of similar materials model research in geomechanics,which has limited the application of model tests in loess area. A model test material for collapsible loess is successfully developed after a lot of compounding tests by airfall method. This similar material is firstly mixed with barite powder and sand as non-cohesive material,and industrial salt,gypsum and bentonite as cohesive material. Then the material is mixed with water evenly. After wetted for 24 hours,the samples are produced by airfall method. At last,the samples are maintained at constant temperature of 50℃,which simulates the deposition mode and formation conditions of eolian loess,to obtain the targeted model test material. Odometer collapse test results show that this artificial material have similar collapsibility with natural loess;and also produce significant collapse when wetted. Shear test results indicate that shear strength parameters of the similar material are much close to natural loess. Since the density of the similar material can be adjusted widely,the model test material developed by the above method would be an ideal model test material for collapsible loess.