水石流概化水槽试验相似律的探讨  

Physical modeling of debris flow in the experimental flume

作　　者：徐永年[1] 梁志勇[1] 苏晓波[1] 王力[1] 

机构地区：[1]中国水利水电科学研究院,北京100044

出　　处：《自然灾害学报》2000年第4期105-110,共6页Journal of Natural Disasters

基　　金：国家自然科学基金!(49831010);国家重大科学基金;水利部联合资助项目!(59890200)

摘　　要：针对水石流颗粒粗、粘性小的特点，提出了利用水槽进行分段模拟水石流的设想。首次通过几何变率解决难度较大的阻力相似问题，改变了以往过度加糙的方式；通过变粒径比尺的方法消除了模型沙级配不连续相似的问题，较好地实现了固体物质级配相似，达到了泥石流的密度相似和输沙相似。通过水槽概化模型试验实例，对本方法进行了验证。In light of thicker grain and smaller viscosity of debris flow, a segmented simulation of the debris flow with flume is presented. For the first time. more difficult resistance similarity is brought about by geometric rate without excessive coarsing and discontinuous similarity of sand grain composition in model is eliminated with different grain scale. On this basis the density similarity and sand conveying similarity are achived. The method presented is verified through a model test case.

关 键 词：水石流 分段模拟 阻力相似 概化水槽试验 泥石流 

分 类 号：P642.23[天文地球—工程地质学] P694[天文地球—地质矿产勘探]