季节冻土区混凝土渠与玻璃钢渠体防冻效益对比研究

发布时间：2018-12-06 08:21

【摘要】：为了研究季节性冻土区不同保温措施下渠道冻胀变化规律,在一个冻融周期内对河套灌区杨家河南边干渠进行现场测试,针对不同保温措施下的冻深与冻胀量进行了分析。结果表明,阳坡与阴坡聚氨酯和聚苯乙烯保温措施条件下6 cm厚的保温效果均优于4 cm厚的保温效果,阳坡4 cm厚的聚氨酯保温效果优于4 cm厚的聚苯乙烯保温效果,而阴坡4 cm厚的聚氨酯保温效果劣于4 cm厚的聚苯乙烯保温效果。从水力条件、节水效益、投资成本等方面对比分析混凝土渠道与玻璃钢渠道的应用性,玻璃钢渠道可减少拆除重建费与保温措施费等费用,且综合投资与混凝土渠道相差不多,随着水资源需求量的急剧增大,玻璃钢渠道具有较好的应用前景。
[Abstract]:In order to study the variation law of channel frost heaving under different thermal insulation measures in seasonal frozen soil region, a field test was carried out on the Yangjia Henan side main canal in Hetao Irrigation area during a freezing and thawing period, and the freezing depth and frost heave quantity under different thermal insulation measures were analyzed. The results showed that the thermal insulation effect of 6 cm thickness was better than that of 4 cm thickness on sunny slope and shade slope, and that of polyurethane with 4 cm thickness on Yangpo was better than that of polystyrene with 4 cm thickness. However, the thermal insulation effect of polyurethane with 4 cm thickness of shady slope is worse than that of polystyrene with 4 cm thickness. From the aspects of hydraulic condition, water saving benefit, investment cost and so on, the application of concrete channel and FRP channel are compared and analyzed. The FRP channel can reduce the cost of demolition and reconstruction and the cost of heat preservation measures, and the comprehensive investment is not much different from that of concrete channel. With the rapid increase of water demand, FRP channel has a good application prospect.
【作者单位】：内蒙古科技大学建筑与土木工程学院;中冶交通建设集团有限公司;
【基金】：内蒙古自治区自然科学基金项目(2013MS0717)
【分类号】：TV698.26

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