张掖大满灌区渠道冻胀现状与防治对策

Current situation and countermeasures of canal frost heave damage in Da Man irrigation area of Zhangye

针对张掖大满灌区骨干渠道存在冻胀问题,通过选择具有代表性渠道破坏段,开展实地调查,对其冻害类型及其成因进行具体分析,部分渠段渠坡现浇混凝土板隆起、滑塌、勾缝材料脱落较为普遍,参照SL 23—2006渠系工程抗冻胀设计规范中的相关规定,针对性的提出了大满灌区骨干渠道冻胀破坏问题的防治对策,为张掖市防治渠道冻胀破坏问题提供理论支持和技术指导。

According to the Zhangye Da Man irrigation area backbone channels exist heave problems, representative channel failure section by selecting, carry out field investigation, detailed analysis of the types and causes of damage, part of the channel of the channel slope of cast-in- situ concrete slab uplift, collapse, jointing materials fall off is more common, according to the Frost H e a v e Resistance Design Specification（ SL 23-2006） of the relevant provisions, specific countermeasures put forward full irrigation channel backbone frost damage, provide theoretical support and technical guidance for frost prevention in Zhangye city channel failure problem.