相似材料试验研究  

Research on similar material of slope simulation experiment

作　　者：左保成[1] 陈从新[1] 刘才华[1] 沈强[1] 肖国峰[1] 刘小巍[1] 

机构地区：[1]中国科学院武汉岩土力学研究所,湖北武汉430071

出　　处：《岩土力学》2004年第11期1805-1808,共4页Rock and Soil Mechanics

摘　　要：结合反倾岩层边坡失稳破坏机理的相似模型研究,对灰岩的相似材料进行了试验,研究了相似材料中骨料与胶结物的配比、胶结物中胶结材料的配比及不同的养护方式对试块强度的影响规律。实验结果表明,用石英砂、石膏和水泥来模拟岩体介质是可行的。无论采用何种养护方式,石膏样的强度与砂胶比呈双曲线关系,而混合样的强度变化规律则呈抛物线变化。石膏样或混合样烘干后的强度均比烘干后放置一段时间的强度高。对于石膏样,其风干的强度随着时间的增加而逐渐增大,而对于混合样,其风干的强度随着时间呈现无规律的变化。这些研究成果为岩石力学相似模型试验提供了依据。Combining with the research on losing mechanics of inversely oblique terrane slope, tests of similar materials of limestone are performed. The influences of sand-binder ratio, different binders proportion, and different maintain measures on sample strength are studied. The test results indicate that it is feasible to use sand, plaster and cement to simulate rock body. It is shown that the curves between the strength of plaster sample and the sand-binder ratio are hyperbolic, but that the curves between the strength of mixed sample and the sand-binder ratio are parabola. For both plaster and mixed samples, the bake-dry strengths will decrease with increasing time. The air-dry strength of plaster sample increases with time increasing. But the strength of mixed sample changes irregularly with time increasing. These results provide useful references for rock mechanics simulation experiments.

关 键 词：物理模型试验 砂胶比 骨料 胶结物 混合样 养护方式 

分 类 号：TU457[建筑科学—岩土工程]