摘要
目前南水北调中线干线京石段衬砌板出现了不同程度的冻胀、裂缝等破坏现象。究其原因大致可以归为施工工艺技术、地质环境、日常保养等。但是也正因为这些小的裂缝，再加上时间的积累，雨水的灌入，冻胀的加剧、密封胶条的不断老化，使得渠道衬砌板进入了一个恶性循环。针对渠道衬砌板的裂缝问题笔者进行以下简单的探究。
Abstract
At present,the Beijing-Shijiazhuang section of middle route of South-to-North Water Transfer Project lining plate suf-fered different degrees of frost heaving, cracks and other damage phenomenon.The reason can be roughly classified into construction technology, geological environment,daily maintenance etc. But precisely because of these smal cracks,coupled with the accumulation of time,the rain pouring,frost heaving continuous aging intensifies,sealing strip, it entered a vicious spiral. According to the author explored crack problem of canal lining board.
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