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成昆铁路北段粘性泥石流浆体流变参数的时间效应
Alternative TitleTIME EFFECT ON RHEOLOGIC PARAMETERS OF VISCOUS DEBRIS FLOW SLURRY AT THE NORTHERN SECTION OF CHENGDU-KUNMING RAILWAY
赵惠林
Corresponding Author赵惠林
1990
Source Publication山地研究
ISSN1008-2786
Volume8Issue:2Pages:125-129
Other Abstract 对成昆铁路北段一些粘性泥石流浆体所作的剪切试验结果表明,流变参数[含:表观粘度η和屈服应力(极限静切力)τ]随时间推移而变化。粘性泥石流浆体的流变参数具有时间依赖效应,随剪切时间推移而递增。粘性泥石流浆体呈现出反触变性的流变行为,随时间推移而变稠,就此越发变得不易流动。 
; Viscous debris flow slurry is a solid-liquid mixture with high concentration. It is of high concentration and unit weight,wide range of grain-size,as well as complex rheologic behaviour.The shear test for viscous debris flow slurry at the northern section of Chengdu-Kunming Railway by the rotating cylinder vicometer RV 12 shows: the rheologic parameters ( apparent viscosity η. and yield stress τ(?) ) pressnt time-dependent effect, i. e. viscosity-time relations.η, decreases with increase of shear rate,but it would increase with increase of shear time. As Fig. 2,while rotor speed n=512r/min,shear stress τincreases 12. 60pa and η. 27mpa·s in shear time of 18 minutes.τy, is the structure strength of slurry, τy, increases with increase of sheaf time. As Fig. 3,in the processes of shear rate variation,τy, rises from 8. 40pa to 79. 60pa. Therefore,the variation shows the time-dependent effect of slurry structure to time.Viscous debris flow slurry is of the rheologic behavious for negative-thixotropy. It thickens with increase of time. The rheologic parameter increases with increase of time,but time-dependent effect of slurry may weaken with increase of time. 
Keyword粘性泥石流 浆体 流变参数 时间依赖效应
Indexed ByCSCD
Language中文
CSCD IDCSCD:935953
Citation statistics
Cited Times:1[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/7225
Collection成都山地所知识仓储(2009年以前)
Affiliation中国科学院水利部成都山地灾害与环境研究所
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
赵惠林. 成昆铁路北段粘性泥石流浆体流变参数的时间效应[J]. 山地研究,1990,8(2):125-129.
APA 赵惠林.(1990).成昆铁路北段粘性泥石流浆体流变参数的时间效应.山地研究,8(2),125-129.
MLA 赵惠林."成昆铁路北段粘性泥石流浆体流变参数的时间效应".山地研究 8.2(1990):125-129.
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