对抗渗性有严格要求的大体积混凝土 ,要求其与成型混凝土同样对待 ,施工缝处裂缝的开展宽度不得大于 0 .3mm。要做到这一点 ,除借鉴以往施工经验 ,加强混凝土温度控制、质量控制、提高混凝土均匀密实度和抗裂能力外 ,还须在工艺上采用从施工缝处开始向远方布料 ,加强施工缝处混凝土振捣、表面处理、养护 ,在垂直施工缝处增设温度钢筋 ,保持施工缝处湿润等措施 The impermeability of the strict requirements of the mass concrete, requiring the same treatment with the molding of concrete, construction joints at the crack width of not more than 0 .3 mm. To do this, in addition to drawing on past experience in construction, to strengthen the concrete temperature control, quality control, to improve the uniform density of concrete and crack resistance, but also must be used in the process from the construction joints to the distant fabric, strengthen the construction joints Vibration concrete, surface treatment, conservation, in the vertical joint construction of additional temperature reinforcement, to keep the construction joints at the wetting and other measures