岩土力学2018，Vol.39Issue(4)：1236-1244,9.DOI:10.16285/j.rsm.2016.1099
冻土离心模型试验相似准则分析
Dimensional analysis of centrifugal modeling of frozen soil
摘要
Abstract
Compared with the traditional physical model test,centrifugal test can simulate the long term process of soil freezing with full-scale stress in a short time.However,there are few researches on the centrifuge modeling of cold regions engineering.At present,scaling laws and similarity conditions of thermal dynamics of freezing soil in geotechnical centrifugal modeling are still not completed,which has become an uncertain factor in quantitative analysis of frost heave by centrifugal technique.Based on hydro-thermal-mechanical interaction process in saturated freezing soil,dimensionless variables have been established by Butterfield dimensional analysis method.The scale factors of the pore pressure,thermal diffusion,pore water migration,consolidation of freezing soil in centrifugal modeling have been derived.In centrifugal test,the effect of water migration,thawing soil consolidation and heat diffusion have the unified time factor 1/N2 of the prototype model,and the scale of velocity of unfrozen water is N above the prototype model.In addition,an application of centrifugal modeling of frozen-thawing process about canals has been carried out by cold regions engineering centrifugal modelling facility.关键词
寒区工程/冻土/离心模型试验/量纲分析Key words
cold regions engineering/frozen ground/centrifugal modeling test/dimensional analysis分类
建筑与水利引用本文复制引用
张晨,蔡正银,徐光明,黄英豪..冻土离心模型试验相似准则分析[J].岩土力学,2018,39(4):1236-1244,9.基金项目
国家重点研发计划(No.2017YFC0405100) （No.2017YFC0405100）
水利部技术示范项目(No.SF-201704) （No.SF-201704）
自然科学基金项目(No.51709185) （No.51709185）
中央公益性科研院所基本科研专项(No.Y316023).This work was supported by the National Key Research and Development Program (2017YFC0405100),the Technical Demonstration Project of China Ministry of Water Resource(SF-201704),the National Natural Science Foundation of China (51709185) and the Fundamental Research Funds for Central Institutes of China (Y316023). （No.Y316023）
