摘要
Abstract
In order to study the frost heave characteristics of the lining structure of a reservoir hydraulic tunnel under the coupling of water and heat,based on the theory of water and heat balance equations,the stress,displacement,and temperature field temporal variation characteristics of the tunnel lining structure were analyzed through frost heave simulation calculation.Research has shown that there is a significant difference in the temporal sensitivity of large and small principal stresses in the lining structure,with significant variations in different parts.The large principal stresses on the inner side of the lining are higher than those on the outer side,while the small principal stresses on the outer side have strong temporal sensitivity.The small principal stresses on the inner side of the arch and bottom are relatively stable,ranging from-0.39MPa to-0.37MPa.The main stress on the inner side of the lining structure is highly correlated with the sensitivity of the temperature field,while the outer side has no significant correlation with it,which is related to the hydration heat of the lining material.The temporal sensitivity of horizontal displacement on the top and bottom outer sides of the arch is weak,while the horizontal displacement on the inside and outside of the arch waist is similar,with vertical displacement higher than horizontal displacement and synchronous contraction effect at the arch waist.The displacement distribution characteristics of the lining structure are consistent at time series nodes,and the frost heave at the arch top and bottom poses the greatest harm.The paper can provide reference for studying the frost heave characteristics of hydraulic tunnel lining structures.关键词
水热力耦合/隧洞/衬砌/冻胀Key words
hydro-thermal coupling/tunnel/lining/frost heave分类
建筑与水利
