一、前言先张法予制予就力混凝土空心板,目前已在港口建设工程中大批使用。某港采用的予应力混凝土空心板原设计每个空心端部设置10根φ8mm封闭式箍筋,田于该筋绑絷较繁,灌筑混凝土困难;经研究取消了封闭式箍筋,只设置了加密大箍筋,事后发现在板端部的中和轴附近出现水平向纵裂缝。 First, the preamble Zhang prefabricated to the concrete hollow slab, is currently in the port construction projects in large-scale use. In the original design of a prestressed concrete hollow slab used in one port, 10 φ8mm enclosed stirrups were installed at each hollow end, and the fields were bound to the tendons in a more complicated way and the concrete was difficult to fill. After the research, the enclosed stirrups were canceled and only the Encryption of large stirrups, and later found in the end of the plate near the axis of horizontal cracks appear horizontally.