联络通道冻结温度场发展及围岩冻胀位移分析OA
Analysis of freezing temperature field development and surrounding rock frost heave displacement in connecting passage
针对人工地层冻结法施工中温度场演变及冻胀变形效应问题,以特定地铁联络通道工程为背景,通过数值模拟,研究了积极冻结期内冻结壁温度场的时空分布特性及冻胀效应对地表和隧道结构所在土层变形的影响.结果表明,冻结壁的形成呈现非均匀性,在转角及底部区域扩展相对迟缓;冻结壁完全闭合是地层变形速率的转折点,发生于冻结后约第25 天;冻胀效应对地表及联络通道所在地层均产生显著的隆起作用,其变形曲线呈"钟形"分布并具备明显的时效累积效应;至第45 天积极冻结期结束,地表最大隆起量达6.2 mm,联络通道所在地层最大隆起量为9.5 mm.
To address the issues of temperature field evolution and frost heave deformation in artificial ground freezing(AGF)construction,this paper investigated a metro connecting passage project using numerical simulation.The spatiotemporal distribution characteristics of the frozen wall temperature field during the active freezing period,as well as the influence of frost heave on ground surface and tunnel structure deformation,were analyzed.The results indicated that the formation of the frozen wall exhibited non-uniformity,with slower development at corners and bottom regions.The complete closure of the frozen wall,occurring around the 25th day of freezing,marked a turning point in ground deformation rate.Frost heave induced significant uplift in both the ground surface and the surrounding strata of the connecting passage,with deformation curves following a ＂bell-shaped ＂distribution and demonstrating notable time-dependent accumulation effects.By the end of the 45-day active freezing period,the maximum surface uplift reached 6.2 mm,while the maximum uplift in the connecting passage strata attained 9.5 mm.
席培胜;王京;翟朝娇;钟谨锐;汤杜勇
安徽建筑大学 土木工程学院,合肥 230601||安徽省城市建设与地下空间工程技术研究中心,合肥 230601安徽建筑大学 土木工程学院,合肥 230601安徽建筑大学 建筑结构与地下工程安徽省重点实验室,合肥 230601安徽建筑大学 土木工程学院,合肥 230601安徽建筑大学 土木工程学院,合肥 230601
交通工程
联络通道人工冻结温度场数值模拟冻结壁围岩变形
cross-passageartificial ground freezing(AGF)temperature fieldnumerical simulationfrozen wallground deformation
《哈尔滨商业大学学报（自然科学版）》 2026 (2)
179-185,7
国家自然科学基金(52408351)安徽省高等学校科学研究项目(2024AH050221)
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