华中科技大学学报（自然科学版）2017，Vol.45Issue(1)：35-40,6.DOI:10.13245/j.hust.170107
铺设保温板的多年冻土边坡水热力耦合分析
Coupling analysis of moisture heat and stress fields of forzen soil slope with insulation board
摘要
Abstract
In order to provide the design basis for the protection of permafrost slope with insulation board ,coupling analysis model of permafrost slope with insulation board was established based on the coupling theory of moisture ,heat and stress ,the multi field ,which was solved by using the finite ele‐ment method and the calculation program was compiled by Matlab .The temperature ,moisture ,stress and displacement of slope with differently thick insulation board was analyzed .The calculation results of a practical project show that insulation board is paved at the end of winter and the thickness is se‐lected at 5~7 cm .At the end of the melt season ,the unfrozen water and shear stress reach the maxi‐mum in freezing‐thawing interface ,the distribution of shear stress is a band and the horizontal dis‐placement is an entasis .With the increasing thickness of insulation board ,both horizontal displace‐ment and the thickness of soil with unfrozen water content significantly decrease ,while maximum shear stress increases .The distribution of horizontal displacement of the slope with insulation board is a dumping at the end of the freezing period .Insulation board has a positive effect on preventing the upper limit of permafrost slope dow n ,w hich can improve the stability of slope .关键词
多年冻土边坡/保温板/水热力耦合/冻融作用/数值分析Key words
frozen soil slope/insulation board/coupling of moisture/freezing and thawing/numerical analy sis分类
建筑与水利引用本文复制引用
董旭光,董建华,何天虎..铺设保温板的多年冻土边坡水热力耦合分析[J].华中科技大学学报（自然科学版）,2017,45(1):35-40,6.基金项目
国家自然科学基金资助项目（51268037）；甘肃省杰出青年基金资助项目（145RJDA330）；陇原青年创新人才扶持计划资助项目（LYRC2014002）；兰州理工大学红柳杰出人才计划资助项目（J201403）． （）
