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1 引 言普通混凝土在水下浇注施工时 ,因水洗作用 ,会造成材料离析、水泥流失 ,无法保证混凝土中材料的均匀性、接缝的可靠性和钢筋握裹力等 ,从而导致施工质量下降及环境污染等问题 .传统的水下混凝土施工主要是靠尽量隔离混凝土拌和物与水的接触 ,为此 ,施工单位通常采用围
1 Introduction Common concrete pouring construction under water, due to the role of washing, will result in material segregation, loss of cement, can not guarantee the uniformity of the material in the concrete, the reliability of the joints and the reinforcement of the bond, resulting in decreased construction quality and Environmental pollution and other issues.Traditional underwater concrete construction is mainly to try to isolate the concrete mix and water contact, therefore, the construction unit usually used Wai