Anti-falling construction method for adjustable head

The invention relates to an anti-falling construction method for a movable head, which comprises the following steps of: before pouring a concrete top beam, pre-burying an embedded plate on which a steel square tube is welded to a corresponding position of the top beam; the steel square strips on the supporting units are inserted into the steel square pipes; mounting a middle section steel pipe support; after effective support replacement construction of the foundation pit is completed and the design requirement is met, the steel supports are dismantled; compared with an existing adjustable head end anti-falling measure, constraint and anti-falling of the end of the steel support are met, welding damage to the end of the adjustable head is reduced, and the steel support can be conveniently dismantled in the later period; and meanwhile, the steel square strip can be repeatedly used. 本发明涉及一种活络头的防坠落施工方法，包括以下步骤：在混凝土冠梁浇筑前，将焊接有钢方管的埋板预埋至冠梁处对应位置；将支撑单元上的钢方条插设于钢方管内；安装中间节段钢管支撑；待基坑有效换撑施工完成并达到设计要求后，拆除钢支撑；与现有活络头端防坠落措施相比，满足