It is crucial to prevent underground tunnel structure from cracking and improve durability of concrete.
地下隧道结构防止混凝土开裂和提高混凝土的耐久性是至关重要的一环。
Considering the specialty and importance of underground structure, it is a very meaningful work to study the reliability of tunnel lining structure.
鉴于隧道与地下结构所具有的特殊性和重要性，对其开展可靠性研究是一项非常有意义的工作。
During concrete pouring for the tunnel of underground transmitting water system, the concrete structure was cracked by the difference in temperature inside and outside.
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。
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