烟囱施工控制的重点及常见质量问题的防控

烟囱作为高耸构筑物，其中心桩的测量控制、大体积砼基础的施工、筒壁中心线垂直度的控制及滑升、调径、模板收分和抽拔均是施工控制的重点。在筒壁滑模施工中易出现筒壁混凝土坍落、混凝土筒壁表面存在局部裂缝及滑禚施工中易出现偏扭等现象，施工如果控制不利，将造成筒体倾斜、筒身混凝土强度降低等质量问题，严重的可能造成质量事故。

The Key to Chimney Construction Control and the Prevention of Common Defects

As a high-rising structure, chimneys shall be built under the key points of construction control of the surveil- lance of king pile, construction of mass concrete, control of＇ verticality of wall center and climbing, adjusting contracting and extracting of the formwork. During the construction of the slip framework of the wall, slumps of concrete, cracks of the wall and twists during construction of the slip framework can be happen, which can cause tilt of the body and lack of strength of the concrete or even more serious quality incidents.