The construction method of synchronously dismantling the lower formwork system and the surrounding support formwork after telescopic post-casting

Abstract

The invention discloses a construction method for synchronously dismantling the lower formwork system of the telescopic post-casting belt and the surrounding formwork supports, comprising the following steps: arching according to the specifications when installing the beam end formwork on both sides of the post-casting belt; binding the steel bars in the beam and the plate Form a steel bar frame; pre-embed high-strength bolts at the end of the post-casting belt of the steel bar in the beam, and the upper end of the high-strength bolt protrudes from the upper side of the steel bar frame; pour concrete, and level the top of the beam before the initial setting of the concrete; After the maintenance is qualified, the steel structure load-bearing members are connected to the beam end top surface on both sides of the post-casting belt through pre-embedded high-strength bolts; the lower formwork system and surrounding formwork of the post-casting belt are removed. That is, during the construction of the beams and floors on both sides of the telescopic post-casting belt, steel structural load-bearing members are installed between the beam ends and top surfaces on both sides of the post-casting belt through pre-embedded bolts, and the original structural beams are replaced by steel structural bearing members The shear force and bending moment at the post-casting belt, so when the supporting formwork around the post-casting belt is removed, the lower formwork system of the post-casting belt can be removed at the same time.

Description

technical field [0001] The invention belongs to the field of building construction, and in particular relates to a construction method for synchronously dismantling the lower formwork system of the telescopic post-casting belt and the surrounding support formwork. Background technique [0002] According to the requirements of current relevant codes, when the concrete strength of the floor slab reaches the formwork removal strength, the lower support formwork of the floor slab can be removed, and the post-casting belt should be closed after the main structure is completed for 60 days and the settlement is stable. Therefore, the lower formwork system of the post-pouring belt must be retained, and cannot be removed together with the lower formwork of the surrounding floor slabs, and the rear roof must not be removed first, so as to avoid uneven settlement and affect structural safety. [0003] However, the demolition time of the lower formwork system of the post-cast belt and t...

AI Technical Summary

Problems solved by technology

[0004] (1) Long-term backlog of turnover materials such as formwork, frame pipes, fasteners, etc., occupying funds and increasing rental costs; (2) Since the formwork is generally made of bakelite formwork, and the weather resistance of bakelite formwork is poor, it should not be shelved after one use, otherwise it will be bonded The glue is easy to age and fall off, which greatly reduces the turnover times of the template;

[0005] (3) The formwork system under the post-pouring belt is not dismantled in time, occupying space, seriously affecting the horizontal transportation of materials on the same layer, and also affecting construction safety and civilized construction image

Images