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超长基础底板施工中后浇带的留置有利于解决超长结构温度应力及高低层差异沉降应力导致底板裂缝,但影响结构安全及防水质量。实际施工中,后浇带浇筑质量也很难保证。因此,尽量减少后浇带的留置对结构是有利的,单靠设置后浇带不足以解决混凝上收缩和温度变化问题时,可以考虑采用补偿收缩混凝土,在适当位置设置膨胀加强带。采用这种方法,不仅可以进一步增大伸缩缝最大间距,而且可以用膨胀加强带取代部分施工后浇带,从而实现混凝土的连续浇筑即无缝施工。
Adopting post-pouring tape in the construction of the extra-long foundation floor is conducive to solving the temperature and stress of the ultra-long structure and the differential settlement stress in the upper and lower floors, which causes cracks in the floor floor, but affects the structural safety and waterproof quality. The actual construction, after pouring with pouring quality is difficult to guarantee. Therefore, to minimize the post-pouring tape retention is beneficial to the structure, simply by setting the post-pouring tape is not sufficient to solve the problem of shrinkage and temperature changes on the coagulation, consider the use of compensated shrinkage concrete, expansion joints in place. Using this method, not only can further increase the maximum expansion joints, but also with the expansion of the belt to replace some of the tape after construction, so that the continuous pouring of concrete that seamless construction.