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透明砂土休止角和起动流速基本特性试验研究
引用本文:殷峰,周航,丁选明,陈胜利,裴安青,李佑. 透明砂土休止角和起动流速基本特性试验研究[J]. 土木与环境工程学报, 2022, 44(1): 28-35
作者姓名:殷峰  周航  丁选明  陈胜利  裴安青  李佑
作者单位:重庆大学 土木工程学院;山地城镇建设与新技术教育部重点实验室, 重庆 400045;重庆市城市建设投资(集团)有限公司, 重庆 400023
基金项目:国家自然科学基金(52027812);重庆市技术创新与应用发展专项(cstc2019jscx-msxmX0107)
摘    要:人工合成透明土材料结合粒子图像处理技术在模型试验中已得到广泛应用,但使用该技术研究桩基冲刷问题还需对其开展更多特性研究.基于熔融石英砂与正十二烷和15#白油混合液制备成透明砂土,通过室内试验研究透明砂土的基本物理特性、休止角和起动流速.结果 表明:透明砂土的透明度除1~2 mm粒径组显著较差外,其余相差不大;各粒径组透...

关 键 词:透明砂土  物理特性  休止角  起动流速
收稿时间:2021-01-27

Experimental study on basic characteristics of angle of repose and initiation velocity of transparent sand
YIN Feng,ZHOU Hang,DING Xuanming,CHEN Shengli,PEI Anqing,LI You. Experimental study on basic characteristics of angle of repose and initiation velocity of transparent sand[J]. Journal of Civil and Environmental Engineering, 2022, 44(1): 28-35
Authors:YIN Feng  ZHOU Hang  DING Xuanming  CHEN Shengli  PEI Anqing  LI You
Affiliation:School of Civil Engineering;Key Laboratory of New Technology for Construction of Cities in Mountain Area, Chongqing University, Chongqing 400045, P. R. China;Chongqing City Construction Investment(Group) Co., Ltd, Chongqing 400023, P. R. China
Abstract:Artificially synthesized transparent soil materials combined with particle image processing technique has been widely used in model testing. However, further study of pile foundation scour and research on its characteristics is essential. Based on the transparent sand prepared by the mixture of fused silica sand, twelve alkane and 15# white mineral oil, the basic physical properties, angle of repose and starting velocity of the transparent sand were studied through laboratory experiments. The results show that the transparency of the mixture is not much different except for the 1-2 mm particle size group which is significantly worse; the bulk density of transparent sand in each particle size group is of slight difference; the bulk density of transparent sand in each particle size group is also of neglectable difference; dry bulk density increases first and then decreases with the increase of particle size; the pore liquid shear rate and shear stress show a good linear relationship, which is a typical Newtonian fluid; the submerged angle of repose increases with increase of the median diameter; the initiation velocity of transparent sand with a particle size group of 0.1-0.2 mm increases with increase of liquid depth, fitting by Shamov''s formula, indicating the better anastomosis effect.
Keywords:transparent sand  physical characteristics  angle of repose  initiation velocity
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