Study on Choice of Creep Model Parameters for Mica-Quartzose Schist
详细信息
- 责任者：Chen Wenling (School of Geological Engineering and Surveying ; Chang’an University ; Xi’an 710054 ; China) ; Zhao Fasuo
- 刊名：Journal of Earth Sciences and Environment
- 出版年：2010
- 卷期：32(2)
- 关键词：片岩 ; schist ; 三轴试验 ; triaxial tests ; 蠕变 ; creep
- 页码：p.200-204
- 图表：4 illus., 2 tables, 13 refs.
- 分类号：1702
- issnNo：ISSN1672-6561
- isbnNo：CN61-1423/P
摘要
A seven-component linear viscoelastic plastic creep model of mica-quartzose schist was built according to the characteristic of triaxial creep test curve.Creep compliance-time curve and strain-time curve were fitted by means of least squares method,and then the parameters of creep model were obtained.The impact factors of obtaining parameters of creep model and the rationality and availability of those parameters were discussed.The result showed that the parameters obtained by the fitting of two curves were diverse from each other because of rating load times,primary load stress value and load time;creep model of mica-quartzose schist was significantly nonlinear;the parameters obtained by the fitting of creep compliance-time curve were not introduced,and the pattern of the parameters obtained by the fitting of strain-time curve was not significant in different stress levels;comprehensive identification method was suggested to replace any one single method which was incompletely used to obtain the parameters of creep model,and it could guarantee the rationality of the result of creep numerical analysis and the safe reliability of construction design in geotechnical engineering.
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