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加拿大丹尼尔约翰逊坝是世界上最大的连拱坝,坝高214米,1981年在混凝土坝的13个拱座中,有10个拱座出现了裂缝。裂缝可能是由于温度骤降产生的。在约12米厚的坝后,水温保持相对稳定,而坝面的气温却能降至-50℃。86年中,蒙特利尔工程公司所属SNC公司和ABBDL公司提出了一份报告,其修复费用超过2.52亿美元,修复计划也较大,因而受到各国坝工设计人员,施工人员,运行人员的关注,对我国严寒地区薄壳坝体结构温度控制及修复加固工程,亦有实际参考价值。
Canada’s Daniel Johnson Dam is the largest arch dam in the world with a height of 214 meters. In 1981, cracks were found in 10 of the 13 abutments of the concrete dam. Cracks may be caused by a sudden drop in temperature. After a dam about 12 meters thick, the water temperature remained relatively stable while the temperature at the dam surface was reduced to -50 ° C. In 1986, SNC Corporation and ABBDL Corporation, a subsidiary of Montreal Engineering Company, submitted a report that paid more than 252 million U.S. dollars for repairing and repairing plans. As a result, they were concerned by dam designers, constructors and operators in various countries. China’s cold region thin-shell dam body temperature control and repair and reinforcement project, there are practical reference value.