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三峡永久船闸结构复杂 ,孔洞多 ,受气温变化影响大。三峡地区气候炎热 ,气温骤降频繁 ,极易引起混凝土温度裂缝。同时 ,块体厚度较薄 ,基础约束区设计允许最高温度低 ,混凝土温控防裂有很大难度。为此设计进行合理分缝分块 ,确定混凝土主要设计指标和温度控制标准是十分必要的
The permanent shiplock of the Three Gorges Project is complex in structure with many holes and is greatly affected by temperature changes. The Three Gorges area, hot climate, frequent temperature plunge, can easily cause concrete temperature cracks. At the same time, the block thickness is thin, the basic design constraints allow the maximum temperature is low, concrete temperature control cracking is very difficult. It is very necessary for the design to carry on the reasonable division and subdivision, to confirm the main design index and the temperature control standard of the concrete