对于严寒地区寒潮是大体积混凝土产生裂缝的主要原因。
In cold region, crevices emerged on the surface of mass concrete because of cold waves.
混凝土顶板长期处于大气环境中，产生内应力致使混凝土产生裂缝。
Leading to cracks is producing the internal stress which the concrete roof being at the atmosphere environment for a long-term.
论述了拱坝混凝土产生裂缝的危害性及其原因，并针对性地提出多种温控防裂措施。
It expounds harmfulness and cause of crack of concrete of arch DAMS, and measures of crack prevention in such structures are suggested.
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