Specification requirements for lap joint of wall column reinforcement and construction standard of wall column reinforcement

1. First of all, the steel bars at the bottom of the wall column must be cleaned up if there is cement mortar. At the same time, the distance between the first stirrup and the two walls needs to be controlled within 5 mm, and the requirements for the vertical arrangement of steel bars in the wall column should be guaranteed to be three. At the same time, the binding range should not be less than three fasteners, the staggered distance should not be less than the lap length, and encryption should be carried out in the lap area.

2. When binding, it is necessary to adopt the method of staggered binding. Stirrups and studs should be kept vertical, and the thread heads should face inward. The net buckle is splayed, and the size of the hook should reach 135 degrees, and its straight length should not be less than 1 days.

Construction standard of wall column reinforcement

1. In the binding construction of wall column reinforcement, positioning is needed first, the bending angle of the joint should be within 4 degrees, and if there is an axis at the joint, the deviation cannot exceed a certain range. For example, it can't be more than 2mm. When the joint is welded, arc welding is generally adopted. It is necessary to ensure that the welding is uniform and full, and no blowholes can be generated. The welding length also needs to meet the requirements of the specification.

2. When binding, stirrups should be uniform, and the spacing between them must be set reasonably. When binding beams and columns, stirrups must be arranged in place at the handover place.

3, column steel binding, need to set up a good protection block, and generally choose the block pipe manufacturers finalize the design.

what are the main types of steel bars in wall columns?

according to the different distribution, there are two categories, one is longitudinal stress, and the other is stirrup. The longitudinal steel bars can bear the axial pressure, while the stirrups can play the role of positioning, and combine with the longitudinal steel bars to form a skeleton, which plays the role of bearing and can bring the effect of shear resistance.

Specification requirements for lap length of column rebar

1. The lap length of rebar generally refers to the lap length of rebar binding connection. Rebar lap refers to the fact that two rebar have a certain overlap length with each other, and the connection method with wire binding is suitable for rebar connection with smaller diameter. Generally, it is used for the reinforcement mesh in concrete, which is evenly arranged in warp and weft, without welding, and only needs to be fixed with iron wire.

2. The joints in the same component should be staggered in batches, and the horizontal net spacing of each joint should not be less than the diameter of the steel bar, and should not be less than 25mm.

3. The length of the joint connection section is 1.3 times of the overlapping length, and all joints whose midpoint is within the length of the connection section belong to the same connection section.

4. The lap length can be calculated from the smaller diameter of the two interconnected steel bars, and the lap length should be calculated in accordance with the relevant regulations of the architectural atlas.

5, reinforced lap beam, plate and wall components, should not exceed 25%, foundation raft should not exceed 5%.

6, reinforced lap column components, should not be more than 5%; If it is really necessary to increase the percentage of joint area in engineering, it should not be greater than 5% for beam members, and it can be relaxed for other members according to the actual situation on site.