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发明授权
CN107881894B 严寒地区混凝土伸缩缝施工养护方法 有权

严寒地区混凝土伸缩缝施工养护方法
摘要：
本发明公开了属于建筑技术领域的一种严寒地区混凝土伸缩缝施工养护方法。具体包括如下五方面的措施：(1)混凝土浇注前伸缩缝底部清洁程度保障措施；(2)新拌混凝土的入模温度保障措施；(3)浇注入模混凝土的保温养护措施；(4)浇注入模混凝土的加热养护措施；(5)养护设施移除方法；本发明采用的严寒地区混凝土伸缩缝施工养护的五项措施，有效的克服严寒条件下的混凝土伸缩缝施工面临的技术挑战：(1)低温导致的混凝土冻融破坏；(2)强度发展缓慢；(3)开挖的伸缩缝基础部位积雪、冰块或异物导致的施工缺陷；有效的提升严寒地区混凝土伸缩缝的制备水平，保证施工进度和路桥质量。
摘要（英）：

The invention discloses a concrete expansion joint construction and maintenance method in a severe cold area and belongs to the technical field of buildings. The method specifically comprises the following measures in five aspects: (1) supporting measures of expansion joint bottom cleanliness degree before concrete pouring; (2) molding-in temperature supporting measures of fresh mixed concrete; (3) heat preservation maintaining measures of poured and molded-in concrete; (4) heating maintenance measures of poured and molded-in concrete; and (5) a maintenance facility removal method. With the adoption of the five measures for concrete expansion joint construction and maintenance method in the severe cold area, the following technological challenges faced by the concrete expansion joint construction under severe cold conditions are effectively overcome: (1) concrete freeze-thaw damage caused by a low temperature; (2) slow strength development; and (3) construction deficiency caused by snow cover, ice blocks or foreign matters on excavated expansion joint foundation parts. Moreover, the preparation level of the concrete expansion joints in the severe cold area is effectively improved,and the construction progress and road and bridge quality are ensured.

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