冬施条件下大体积混凝土“跳仓法”施工及质量控制

WINTER CONSTRUCTION OF MASSIVE CONCRETE BY "ALTERNATIVE BAY METHOD" AND QUALITY CONTROL

针对实际工程中在冬期施工的不利环境下,基础底板大体积混凝土承受应力、收缩变形及受温度变化影响较大等特点,对混凝土的变形裂缝采取措施,采用"跳仓法"施工,取消了原有设计后浇带,保障了在冬施环境下的大体积混凝土的施工质量,避免基础底板混凝土承受应力及收缩变形产生有害裂缝而产生渗漏,取得了良好的效果。

Considering that winter construction of massive concrete foundation slab under severe conditions suffers from obvious influences of stress, shrinkage deformation and temperature fluctuation, measures are taken to prevent deformation crack on concrete, 'alternative bay' construction method is adopted and after-pouring belt in the original design is cancelled to ensure the winter construction quality of massive concrete and to avoid harmful crack and leakage due to stress and shrinkage deformation of concrete foundation slab. Favorable construction effects are realized.