Everyone knows the important role of steel skeleton in concrete, so let's not talk about it here, just say that it is accepted for acceptance after inspection.
1. Familiar with the drawings, specifications and evaluation standards, which is the basis for judging that the steel bar cage is unqualified upon acceptance.
2. Look at the steel cage to be accepted from a distance, and write down the awkward places in your heart, which is the key point to pay attention to when you accept it in detail.
3. First of all, the geometric size of the steel skeleton is measured, and the details are accepted after passing the qualification.
4. Check the quantity, length, spacing and position according to the reinforcement number of the drawing one by one, especially the inspection of the embedded parts. If the embedded parts are forgotten, it will have a greater impact on the subsequent process.
5. Check the number, position, interface and integrity of the bellows.
The above is basically no problem for the team in the dry beam field in recent years, because the fetal membrane is now used, and the corresponding steel bars and prestressed bellows are notched, and it will not be wrong to use a little dim sum).
Here's what often goes wrong:
6. Whether the steel bar binding wire head is held into the skeleton, and the specification stipulates that the binding wire head shall not extend into the protective layer. In order to facilitate the rapid binding of steel bars, the lashing workers often do not hold back, so they must let the construction unit rectify and develop good habits in the early stage.
7. Binding of stirrups. For binding, it is advisable to adopt a figure-8 method that changes the direction of the wire winding point by point, and for steel bars with a diameter of 25mm or more, it is advisable to tie them in a double diagonal cross-shaped way. The rebar intersections at the corners of the structure or members should be fully tied (this is not possible with many units).;The intersection of the straight part in the middle can be staggered, but the intersection of the binding should account for more than 40% of the total intersection. (Welding is generally checked in the machining area.) ）
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