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中文摘要：
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。
英文摘要：
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.
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