摘要
在寒旱地区刚性衬砌防渗渠道由于冬季负温常常遭受不同程度的冻害破坏,严重影响渠道的正常运转及防渗效果。针对内蒙古临河地区混凝土衬砌渠道严重冻胀破坏问题,提出在该地区渠道混凝土衬砌下面铺设不同厚度的聚氨酯保温板来解决此问题,进行了现场试验,并采用有限元分析软件ADINA分析了不同厚度保温板下的冻胀规律。结果表明:该地区阴坡渠道下部采用6 cm厚的聚氨酯保温板可削减冻胀量11.4 cm,冻胀削减率达到81%;阳坡渠道下部采用5 cm厚的聚氨酯保温板可削减冻胀量3.2 cm,冻胀削减率达到68%,有效地阻止冻胀破坏,为后续渠道衬砌施工中聚氨酯保温板厚度设计提供了技术支持。
In seasonal frozen soil regions, rigid material lining seepage channels often suffer from varying degrees of frost damage due to neg-ative temperature in winter. This affects the normal operation of channels and the effect of seepage control seriously. Targeted at the problemof channel concrete lining frost heaving damage in Lin-he area, Inner Mongolia, this paper offers a solution to laying different thicknesses pol-yurethane insulation boards under the channel concrete lining. We conduct a field test and utilize ADINA to analyze the law of frost heave indifferent positions of the canal. The results show that a thickness of 6 cm polyurethane insulation board cuts the frost heave amount of 12.5 cmand cut frost heave rate of 81% in yin slope of channels and a thickness of 5 cm polyurethane insulation board cuts the frost heave amount of3.2 cm and cut frost heave rate of 68% in slope of channels. This can prevent frost heave damage and provide technical support for the thick-ness of polyurethane board in the lining canal construction effectively.
出处
《中国农村水利水电》
北大核心
2016年第12期130-134,共5页
China Rural Water and Hydropower
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
渠道
防冻胀试验
数值模拟
polyurethane insulation hoard
canal
anti-frost test
numerical simulation
