森林工程2025，Vol.41Issue(3)：629-635,7.DOI:10.7525/j.issn.1006-8023.2025.03.019
冻结法施工中围岩的冻胀应力、冻胀应变和冻胀潜势
Freezing method construction of surrounding rock freezing expansion stress freezing expansion strain and freezing expansion potential
摘要
Abstract
To predict and control the frost heave behavior of surrounding rock in freezing construction,based on the theory of accumulated deformation energy in elastoplastic materials with expansion tendencies,this study analyzed that frozen soil with expansion tendencies under constraints possessed such deformation energy,which manifested as frost heave stress and frost heave strain when the constraints were insufficient or released.Therefore,this paper proposed the concept and expression of frost heave potential on the basis of the theory of elastic deformation energy.This concept,with frost heave stress and frost heave strain functions as parameters,represented the deformation energy accumulated in the soil due to freezing of the surrounding rock.Based on this,a series of frost heave tests were conducted on silty clay along a subway line.Calculations yielded frost heave stress and frost heave strain at different temperatures.When the freezing temperature was-10℃,the frost heave stress,frost heave strain,and frost heave rate were 0.338 MPa,0.446%,and 3.13%,respectively.The calculated results were in good agreement with the actual engineering require-ments.Frost heave potential can be used to describe the overall frost heave behavior of rock and soil masses and provides a new perspective and approach for enriching and developing frozen soil theory and freezing method technology.关键词
冻结法施工/冻胀应力/冻胀应变/冻胀潜势/冻胀率Key words
Freezing method construction/frost heave stress/frost heave strain/frost heave potential/frost heave rate分类
建筑与水利引用本文复制引用
张帅伟,李顺群,陈立航,闫心怡,张丙坤,杨长松,冯洪川..冻结法施工中围岩的冻胀应力、冻胀应变和冻胀潜势[J].森林工程,2025,41(3):629-635,7.基金项目
国家自然科学基金项目(52478354) （52478354）
甘肃省重点研发计划项目(23YFGA0038) （23YFGA0038）
天津市研究生科研创新项目资助(2022SKYZ329). （2022SKYZ329）
