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在混凝土施工过程中,为保证混凝土表面光洁,模板牢固和混凝土成形尺寸,对模板加固时,一般采用对拉螺栓(φ12或φ14的光圆钢筋两端过丝)加固,拆模后,将钢筋用手持切割机割除,这样处理后,螺栓端部外露于混凝土表面,经过一段时间钢筋生锈,影响混凝土外观质量,同时对于有防水要求的墙体,不利于防水。在燕山水库泄洪洞工程混凝土施工过程中,对模板的加固同样采用对拉螺栓进行加固,并在此基础上有所改进:在对拉螺栓端部靠近模板3cm位置处,焊一直径
In the process of concrete construction, in order to ensure the concrete surface smooth, solid formwork and concrete forming dimensions, the template reinforcement, the general use of the pull bolt (φ12 or φ14 light round bar at both ends of the wire) reinforcement, demolition of the mold, the reinforcement Cut with a hand-held cutting machine, so that after treatment, the exposed end of the bolt on the concrete surface, after a period of rust steel, affecting the appearance of concrete quality, while for walls with waterproof requirements, is not conducive to waterproof. In Yanshan Reservoir Spillway Tunnel project in the process of concrete construction, the reinforcement of the template is also used to reinforce the bolt, and on this basis to improve: at the end of the bolt near the template 3cm position, welding a diameter