渠道衬砌结构冻胀特性模拟分析  

Simulation Analysis of Frost Heare Characteristics of Channel Lining Structures

作　　者：张永玲 肖让 付俊科 ZHANG Yongling;XIAO Rang;FU Junke(College of Civil Engineering,Hexi University,Research Institute of Water Resources Protection and Utilization in Hexi Corridor,Zhangye 734000,China)

机构地区：[1]河西学院土木工程学院河西走廊水资源保护利用研究所,甘肃张掖734000

出　　处：《河南科技》2024年第11期53-56,共4页Henan Science and Technology

基　　金：甘肃省高等学校创新基金项目“季节性冻土区农田冬灌回归水入渗对垫层混凝土渠道冻胀的诱发机理研究”(2021A-118);甘肃省教育厅高等学校创新基金项目“不同断面结构明渠信息化精确量水关键技术研究”(2020B-212);甘肃省级大学生创新训练计划项目(S202110740046);横向课题“山丹县马营河大型灌区、寺沟河中型灌区农田灌溉水有效利用系数测算分析”(H2023005)。

摘　　要：【目的】通过建立渠道混凝土衬砌结构数值计算模型,深入了解渠道混凝土衬砌结构和渠基土壤在冻胀条件下的温度变化和变形特征。【方法】利用有限元软件建立包含渠道衬砌结构和渠基土壤的数值模型,并考虑渠基土壤温度影响,模拟计算渠道底部温度和衬砌结构的冻胀位移。【结果】研究结果表明,无论是衬砌结构和渠基土壤,考虑接触还是未考虑接触,渠基土壤温度不同深度温度变化均相同,在考虑接触的衬砌结构中,阴坡和阳坡的冻胀变位较渠底更大。【结论】衬砌结构接触或未接触条件下,渠基土壤温度分布规律是一致的,衬砌结构的阴坡和阳坡在顶部冻胀位移和变形存在明显差异。研究成果对渠道衬砌结构的抗冻胀能力方面的研究有一定的参考价值。[Purposes]This study aims to establish a numerical calculation model for the concrete lining structure of the channel,in order to gain a deep understanding of the temperature changes and deforma-tion characteristics of the concrete lining structure and the soil of the channel foundation under frost heave conditions.[Methods]A numerical model was established using finite element software,which in-cludes the channel lining structure and the soil of the channel foundation.The influence of soil tempera-ture on the channel foundation was considered,and the temperature at the bottom of the channel and the frost heave displacement of the lining structure were simulated and calculated.[Findings]The results show that regardless of whether the lining structure and the canal foundation soil consider contact or not,the temperature change of the canal foundation soil is the same at different depths.In the lining structure considering contact,the frost heave displacement of the shaded and sunny slopes is greater than that of the canal bottom.[Conclusions]The distribution pattern of soil temperature in the canal foundation is consistent under the contact or non-contact conditions of the lining structure,and there are significant differences in frost heave displacement and deformation at the top between the shaded and sunny slopes of the lining structure,which has certain reference value for improving the frost heave resistance of chan-nel lining structures.

关 键 词：渠道衬砌 数值模拟 冻胀特性 

分 类 号：TV698.26[水利工程—水利水电工程]