一·前言渡槽工程是渠系主要建筑物之一。据吉林省乃至黑龙江省的抽样调查[1],在冻害严重地区,渡槽的受害率达70～80%。几经处理和重建,未能根本解决问题,造成不少浪费,且成为工程存在的主要问题。 I. Introduction Aqueduct is one of the major structures in the canal system. According to the sample survey conducted by Jilin Province and even Heilongjiang Province [1], the damage rate of the aqueduct was 70-80% in areas with severe frost damage. After several treatment and reconstruction, it failed to solve the problem fundamentally, resulting in a lot of waste and becoming a major problem existing in the project.