Beam reinforcement binding is one of the important links in reinforcement engineering, its quality directly affects the safety and stability of the building structure. Therefore, it is very necessary to supervise and accept the beam reinforcement binding work. This article will introduce the operation requirements, common quality problems and prevention measures of beam reinforcement binding, and summarize the key points of supervision and acceptance of beam reinforcement binding.
Process flow: Check the model, specification and quantity of the finished steel bar Clean up the template Elastic steel bar position line Binding the ground beam reinforcement (first the lower layer of the bottom plate, and then the upper layer of the bottom plate, and ensure the position, spacing and thickness of the protective layer of the upper and lower layers of steel bars) Binding the frame beam reinforcement (same ground beam) Binding the roof reinforcement (upper and lower layers) Fixing the cantilever member reinforcement and ensuring the position According to the requirements of the specification, the cushion block and the stool are padded Hidden inspection Enter the next process.
Operational Points:(1) Check the model, specification and quantity of the finished steel bar to ensure that the diameter and spacing of the steel bar meet the design and specification requirements.
2) Clean the template to ensure that there is no debris in the template, and rinse the surface of the template with water.
3) According to the design requirements of the drawings, pop up the position line of the reinforcement, and pay attention to the position relationship between the primary and secondary beams and the upper and lower reinforcements.
4) The binding sequence of the ground beam reinforcement is the lower layer first, and then the upper layer, and the position, spacing and thickness of the protective layer of the upper and lower layers of steel bars should be ensured.
5) The binding sequence of the frame beam reinforcement is the same as the ground beam, first anchor the lower reinforcement in the column or ground beam as required, and then place the upper reinforcement in place and fix it as required.
6) Attention should be paid to the spacing between the upper and lower layers of steel bars and the thickness of the protective layer when the roof steel bar is tied, and the cushion blocks and stools should be reasonably arranged in accordance with the requirements of the specification.
7) The position of the reinforcement of the cantilever member should be accurate, so as not to affect the structural safety and use function.
1. The longitudinal stress of the beam is misaligned
phenomenon: The upper and lower positions of the longitudinal stressed steel bars are incorrect;or the number of joints in the same section exceeds the specification.
Prevention and control measures: Reasonably arrange the position of the longitudinal stressed reinforcement of the beam in the support and the middle of the span;Ensure that the location and number of fittings meet the requirements of the specification. In the construction process, the supervision of formwork support and pouring concrete should be strengthened to avoid dislocation and overconnection of the first behavior.
2. The beam stirrup encryption area does not meet the requirements of the specification
phenomenon: The length of the encryption zone does not meet the requirements of the specificationThe number of stirrups in the encryption zone is insufficient.
Prevention and control measures: Familiar with the provisions of the code for the stirrup infill area of frame beams, secondary beams and beams with seismic requirements;Construction in strict accordance with the drawings, if the design is not clearly stipulated, according to the requirements of the specification. During the construction process, inspection and supervision should be strengthened to ensure that the length of the infill area and the number of stirrups meet the design and specification requirements.
3. The longitudinal reinforcement configuration of the upper part of the beam is too much or too little
phenomenon: The net distance is insufficient due to the excessive configuration of longitudinal reinforcement in the upper part of the beam;Or the layer of protection is too large due to too little configuration.
Prevention and control measures: In the design stage, the configuration of the upper longitudinal reinforcement should be reasonably controlledIn the construction stage, the reinforcement binding and protective layer control should be carried out in strict accordance with the drawings and specifications. If you find that there is too much or too little configuration, you should communicate with the design unit in time to make adjustments.
1. Check the model, specification and quantity of the finished steel bar to ensure that it meets the design and specification requirements.
2. Clean up the formwork and rinse it, and bounce the position line of the steel bar.
3. Carry out the binding of beam reinforcement according to the requirements of the specification, and pay attention to the position relationship between the primary and secondary beams and the upper and lower reinforcements.
4. Strengthen the position control of the steel bars of the cantilever members to ensure the safety of the structure and the use function.
5. Strictly control the position and number of joints of the longitudinal stressed steel bars of the beam to ensure that they meet the requirements of the code.
6. Check whether the length of the encryption area and the number of stirrups meet the specifications and design requirements.
7. Strengthen the inspection and supervision of the construction process to ensure that the construction quality meets the requirements.