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深圳红树西岸地下室1层的面积约50000m2,平面复杂,长度超过300m,不设永久伸缩缝,为一超长、超宽大面积混凝土结构,温差收缩效应在该类结构中更为复杂突出,仅通过构造措施难以解决。在对国内外温差计算分析研究基础上,参照文献[1]提出的温差效应计算新方法,首次对复杂超大型项目地下室顶、底板的温差收缩效应进行了完整的有限元计算分析。计算分析结果表明,文献[1]提出的温差效应计算方法及温差效应施工模拟、地基或桩基的有限约束刚度,计及混凝土收缩徐变、计及后浇带影响等理念可广泛应用于大型地下室及超长混凝土结构实际工程中,具有很好的可操作性。并在此基础上提出了解决超大面积混凝土结构温差效应的针对性措施,对面广量大的大体量混凝土结构设计有一定的参考价值。
The area of the basement of the west bank of Shenzhen mangrove west bank is about 50000m2. The plane is complex and the length is more than 300m. There is no permanent expansion joint. It is an ultra-long and ultra wide-area concrete structure. The shrinkage effect of temperature difference is more complicated and prominent in this kind of structure. Difficult to solve through structural measures. Based on the calculation and analysis of the temperature difference at home and abroad, a complete finite element analysis of the temperature shrinkage effect of the basement floor and the floor of the complex super-large project is made for the first time with reference to the new method of temperature difference effect calculation proposed in [1]. The calculation and analysis results show that the calculation method of temperature difference effect and temperature difference construction simulation proposed in [1], the finite constraint stiffness of foundation or pile foundation, considering the shrinkage and creep of concrete, considering the effects of post-pouring zone can be widely applied to large scale Basement and super-long concrete structures in the actual project, with good operability. On this basis, some measures are put forward to solve the temperature difference effect of super-large-area concrete structures, which is of certain reference value for the design of large-volume and large-volume concrete structures.