是否存在不均匀收缩？
三峡工程永久船闸地下输水遂洞在洞室浇筑衬砌一段时期内，结构混凝土受到内外温差的影响，因不均匀收缩产生裂缝。
During concrete pouring for the tunnel of underground transmitting water system, the concrete structure was cracked by the difference in temperature inside and outside.
在现代建筑施工中，为了解决混凝土收缩、不均匀沉降等问题往往设置了后浇带。
The latter cast belt is usually set up in order to resist the contraction and uneven settlement of concrete in modern construction.
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