Brief analysis of plate steel binding construction technology?

(1) process flow: clean the formwork → draw lines on the formwork → bind the reinforced bar under the slab → bind the short reinforced bar with negative bending moment.

(2) Plate reinforcement structure requirements:

1) The short-term distribution reinforcement of the slab should be placed below (generally);

2) Double-layer bidirectional reinforcement with negative bending distance shall be bound point by point at the intersection of reinforcement; Others should be tied one by one at the supporting edges of the plate reinforcement at the intersection, and the middle can be picked and tied into a plum blossom shape; When the plate reinforcement is round steel, it should be adopted; Eight-character buckle; Bound, should not be bound;

3) Hook 12d should be set at the anchorage end of the negative bending distance plate, and it is unnecessary to hook when passing through the bearing; The anchorage of reinforcement at the bottom of slab is the same as that of non-frame beam;

4) The distance between the edge plate reinforcement and the beam edge should be 50 mm; ;

5) The additional double-layer bidirectional reinforcing bars added at the four corners of the building shall be in the middle of the original slab reinforcing bars, and the spacing between the reinforcing bars shall meet the requirements of [15mm, d].

6) The stress reinforcement of cantilever plate should be placed on the plate skin, and it is not allowed to be trampled;

7) The reinforcement of the independent column foundation slab is subjected to double bending, and the longitudinal reinforcement should be placed below.

8) The lap length and lap position of steel bars are the same as those of the above beams.

(3) Binding process

1) Clean up the sundries on the template, draw the main reinforcement on the template with chalk, and allocate the spacing of reinforcement.

2) According to the planned spacing, put the stressed main reinforcement first, and then put the distribution reinforcement. Embedded parts, electrical conduits and reserved holes shall be installed in time.

3) When there is a plate beam in the cast-in-place slab, the plate beam reinforcement shall be bound first, and then the plate reinforcement shall be placed.

4) When binding plate reinforcement, straight buckle or splayed buckle is generally adopted. Except for the intersection of two peripheral tendons, other points can be bound alternately (all intersections of two-way slabs must be bound). If the floor is a double-layer reinforced bar, a reinforced horse stool should be added between the two layers of reinforced bars to ensure the position of the upper reinforcement. Each intersection of negative moment reinforcement shall be bound.

5) The reinforcement shall be padded with mortar pads with a spacing of 0.8m, and the thickness of the pads shall be equal to the thickness of the protective layer.

6) Reinforcement measures should be taken at the post-cast strip to ensure that the gluten of the slab is not too big (the horse stool can be padded more).

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