高寒区供水渠道冻害机理分析及防治措施研究

Mechanism analysis and control measures of freezing damage of water supply channel in high attitude and cold regions

针对高寒区渠道冻胀问题,首先总结了渠道混凝土衬砌冻害的发生机理及冻胀破坏形式,论述了当前渠道冻害的三种研究方法理论分析、现场调查和模型试验的优缺点和适用性。其次分析了渠道冻害的三个必备条件,即易冻胀的土质条件、土的含水条件及温度条件,提出了消除或削弱其中的一个条件即可避免冻胀的发生或减轻冻害程度的观点。最后根据渠道的冻害机理及主要影响因素提出了渠道防冻胀措施并对将来的研究方向提出了展望。

In view of the frost heaving problem of the channel in high attitude and cold regions,the occurrence mechanism and damage form of the frost heaving in concrete of the channel was summarized in the paper.It discussed the advantages/disadvantages and applicability of the three current research methods of the frost damage of the channel,including theoretical analysis,field investigation and model test.The three necessary conditions of frost damage in channel were discussed,which were soil condition,water content and temperature.The view that eliminating or weakening one of the conditions can avoid the occurrence of frost heave or reduce the damage was put forward.According to the mechanism of frost damage and the main influencing factors,the measures of frost heaving were put forward and the future research direction was prospected.