摘要
在我国北方的季节性冻土地区,冻害是防渗衬砌渠道面临的难题之一,其中冻胀破坏最为严重,分布比较广泛且对输水工程的危害程度较大,因此研究渠道冻胀的破坏机理和防治措施是亟待解决的重要工程技术问题。本试验通过在内蒙古临河地区南边分干渠做聚氨酯保温板的防冻胀试验,分析各种保温板厚度下各层基土的地温、冻深、含水率和冻胀量等影响冻胀变化因素的规律及其特征,总结出了该地区素混凝土衬砌渠道中聚氨酯保温材料的防冻胀破坏方案。结果显示:采用聚氨酯保温板防冻胀技术可以有效地减少冻胀作用对渠道刚性衬砌材料的破坏,确保衬砌的稳定,渠道安全地运行,同时也为后续刚性衬砌渠道中聚氨酯保温材料厚度施工设计提供了技术支持。
In China's seasonal frozen soil region,frostheaving,a tough problem encountered by concrete lining canal,is widely distributed and does great harm to water conveyance project. To explore its damage mechanism and control measures is of great importance. Through the site test on polyurethane thermal insulation plate in the south canal of Lin-he,Inner Mongolia,this paper explores the changing rules and features of the ground temperature,frozen depth,moisture content and frost heave amount with treatments of boards of different thickness,with the anti-freeze expansion plan for the concrete lining channel in this region. The results showed that polyurethane thermal insulation plate could effectively reduce the frost heave damage to rigid lining material of canal,ensure the stability of lining and the safety of canal,which will be of value for the selection of thickness of insulation materials in the rigid lining canal.
出处
《干旱地区农业研究》
CSCD
北大核心
2017年第2期195-200,共6页
Agricultural Research in the Arid Areas
基金
内蒙古自治区自然科学基金项目(2013MS0717)
水利部公益性行业科研专项经费项目(201301094)
关键词
聚氨酯保温板
内蒙古临河南边渠
保温试验
应用研究
polyurethane thermal insulation plate
the south canal of Lin-he
Inner Mongolia
thermal insulation test
application research
