Common quality defects in reinforcement engineering
First, raw materials:
(a) the inspection and storage of materials do not meet the requirements
(2) Corrosion and pollution of steel bars
Second, the steel processing:
1, wrong specification;
2. The blanking length is not enough;
3. The stirrup size is wrong, the hook degree is wrong, and the straight line length of the hook is not enough;
4, hook length can not meet the requirements of anchorage;
5. The thread length of sleeve connection is not enough;
6. The height of the horse stool is not enough;
7. Determine the relationship between complex nodes that are not complete in space;
8, size, angle difference, not straight, bending point is not allowed, hook is short;
9, different grades of steel bars and imported steel bars, do not pay attention to different bending radius requirements;
10. The deformation during transportation and stacking has not been corrected.
Three, steel binding and installation common fault
1, deviation of main reinforcement and irregular spacing;
2. The protective layer thickness of main reinforcement is not enough. Or the protective layer is too thick;
3, the main reinforcement lap position is wrong, the lap length is not enough, and the lap rate of the lap section exceeds the standard;
4, welding is not standardized, lap welding length is not enough;
5. The specifications and models of the main reinforcement are wrong, too small or the strength grade is insufficient;
6. The length of beam and column encryption area is not enough;
7, cantilever reinforcement anchorage length is not enough, cantilever reinforcement in the wrong direction;
8. The place where the bending steel bar is added is not added, and the beam side needs to be added with additional encryption hoops;
9, beam waist reinforcement is not set, beam anti-torsion waist reinforcement anchorage length is wrong;
10, column stirrups at beam-column joints are not set;
1 1. There is no horizontal reinforcement at the intersection of shear wall and structural beam or concealed beam;
12, the row spacing of multiple rows of steel bars is incorrect;
13, the negative reinforcement of the plate is not fully tied, and it is tied into a splayed buckle;
14, for intersecting beams and columns with the same section size, the main reinforcement of the beam does not bend into the column, which leads to the reduction of the effective section size of the beam;
15, the column rebar is not bent when inserted into the foundation such as pile cap, and the column rebar in the foundation is not stirrup;
16, the stirrup at the lap joint of beam-column reinforcement is not encrypted;
17, steel anchorage does not meet the specification requirements:
18, the main reinforcement is not tied in place (the four corners of the main reinforcement do not stick to the stirrup angle, and the middle main reinforcement does not stick to the stirrup);
19, the position of main reinforcement is reversed (tension and compression are reversed, especially for cantilever beams and slabs);
20. Without stirrups, the main reinforcement moves seriously;
2 1, steel binding buckle, missing buckle and loose buckle do not meet the specification requirements;
22, stirrup spacing is uneven, binding is not firm, not stick to the main reinforcement;
23, column main reinforcement hook and plate main reinforcement hook in the wrong direction;
24, reinforced joint is good;
25, reinforced protective layer thickness does not meet the requirements;
26, there are welding requirements of steel welding test;
27. The welder has no post certificate of special operators, or the welder does not meet the welding conditions;
28, not according to the provisions of the specification on-site interception test specimens.
29, covered electrode, flux does not meet the requirements:
30, welding quality does not meet the requirements;
3 1, the welded joint does not meet the requirements;
32, threaded joint does not meet the requirements.
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