1. Reinforcement engineering
Ground beam reinforcement binding:
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Standard of Practice:
1. The elastic line controls the spacing between the main reinforcement and the stirrups;
2. The bottom is made of cement cushion blocks, and the thickness of the protective layer is controlled by plastic or other cushion blocks on both sides of the beam;
3、 绑扎丝朝向梁内侧弯曲。
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Quality Standards:
1. The specifications and quantity of steel bars meet the design requirements;
2. The allowable deviation of the stressed steel bar spacing ± within 10mm, the allowable deviation of the row spacing within ±5mm, the allowable deviation of stirrup spacing within ±20mm, and the allowable deviation of the thickness of the protective layer within ±5mm;
3. There is no leakage in the binding of the wire buckle, and the wire is bent inward.
Bottom plate reinforcement binding template:
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Standard of Practice:
1. Stretch the line on the ground to control the spacing of the main reinforcement;
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Quality Standards:
1. The specifications, quantity and spacing of steel bars meet the design requirements;
2. The thickness deviation of the protective layer shall not be greater than ±10mm, and the steel bar shall not be in contact with the bottom plate or side mold to prevent water seepage and corrosion;
3. The allowable deviation of the length and width spacing of the stressed steel mesh ±is within 10mm, the allowable deviation of the mesh size is within ±20mm, and the allowable error of stirrup spacing is ± within 20mm;
4. Use a level to measure the flatness of the upper row of steel bars not more than 5mm/2m to ensure the thickness of the protective layer of steel bars;
5. There is no leakage in the binding of the wire buckle, and the wire is bent inward.
Rebar sleeve connection template:
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Standard of Practice:
1. The steel bar is cut by a toothless saw, and the end face is straight;
2. The steel sleeve is qualified, the steel bar thread processing is full, and there are no defects such as broken teeth and bald teeth. After the threading is completed, it should be protected by a protective cover;
3. The sleeve connection is connected by torque wrench, and the tightening torque value meets the requirements of the specification;
4. Check one by one, and mark the paint after passing the mark.
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Quality Standards:
1. The end of the steel bar should be perpendicular to the axis, and there should be no horseshoe shape or deflection;
2. The tightening torque value of the torque wrench meets the specifications or design requirements, and the accuracy of the torque wrench is ±15%;
3. After connection, each end should not be exposed more than one complete filament;
4. The two interconnected steel ribs should be in a straight line.
Second, the formwork project
Wood formwork installation template:
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Standard of Practice:
1. The joints of the formwork should not leak slurry;
2. The template should be coated with a separator before use;
3. The deviation of template installation should be in accordance with the specifications.
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Quality Standards:
1. Check all the seams of the template and the brushing of the release agent;
2. Check the allowable deviation of the template after the template is installed: the axis position is within 5mm, and the cross-sectional size: +4mm to -5mm;
3. The allowable deviation of the height difference of the surface of the adjacent template is less than 2mm, and the surface flatness cannot be greater than 5mm;
4. The roof template needs to be arched according to the span of 1/1000~3/1000.
Template bottom support template:
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Standard of Practice:
1. The steel pipe fasteners used must have a quality certificate;
2. The specifications and spacing of the primary and secondary keels at the bottom of the template meet the design requirements;
3. The roof pole should be kept in the same straight line;
4. When the pole is set up, in order to prevent the concrete of the lower floor from being crushed, the bottom of the pole must be padded with a square wooden cushion block;
5. The vertical rod and horizontal rod should meet the design requirements;
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Quality Standards:
1. All kinds of steel pipes are welded steel pipes with an outer diameter of 48mm and a wall thickness of 3.5mm, and have quality certificates;
2. The steel pipe used shall not have defects such as deformation, open welding, cracks, etc., and shall be treated with anti-rust;
3. The fasteners used shall be fully inspected, and there shall be no pores, sand holes, cracks, slippery wires and other defects and quality certificates;
4. The bottom sweeping rod is generally controlled within 500mm from the ground, and the upper cross bar is set at the top, and the waist bar is set in the middle to prevent the vertical rod from being unstable;
5. According to the calculation results, in the large span or the main beam position, in order to prevent local instability, scissor braces should be arranged;
6. The cushion block at the bottom of the pole is made of 50mm×100mm short wooden square, and the length is greater than 20cm.
3. Concrete engineering
Reinforced concrete beam-column joint model:
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Standards of practice
1. The strength grade of structural concrete must meet the design requirements;
2. The structural dimensions must be consistent with the design drawings and change negotiations;
3. The specimens used to check the concrete strength of structural components should be randomly selected at the pouring site of the concrete, and the sampling and retention of the specimens should conform to the specifications.
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Quality Standards:
1. The appearance of concrete has no quality problems such as exposed ribs, honeycomb, holes, slag inclusions, looseness, cracks, and shape defects;
2. Allowable deviation of structural dimensions: axis: 5mm, verticality: 8mm ≦5m, 10mm >5m, elevation: ±10mm, cross-sectional size: +8mm, -5mm, surface flatness: 8mm.
Reinforced concrete shear wall model:
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Standard of Practice:
1. The strength grade of structural concrete must meet the design requirements;
2. The structural dimensions must be consistent with the design drawings and change negotiations;
3. The specimens used to check the concrete strength of structural components should be randomly selected at the pouring site of the concrete, and the sampling and retention of the specimens should conform to the specifications.
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Quality Standards:
1. The appearance of concrete has no quality problems such as exposed ribs, honeycomb, holes, slag inclusions, looseness, cracks, and shape defects;
2. Allowable deviation of structural size: axis: 5mm, verticality: ≦5m, allowable deviation 8mm, perpendicularity>5m, allowment: ±10mm, cross-sectional size: +8mm, -5mm, surface flatness: 8mm.
Fourth, the basement membrane waterproofing
Basement membrane waterproofing sample:
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Standard of Practice:
1. Base treatment, coating of base oil;
2. Set up additional layers according to the requirements of the specification;
3. Roll laying;
4. After the coil is paved, the protective layer is poured in time to ensure the quality of the finished product.
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Quality Standards:
1. The base layer is firm, smooth, no floating dust, the bottom oil is evenly brushed, and there is no flow and exposed bottom;
2. The width of the additional layer ≥50cm, which is arranged at the yin and yang corners and the root of the pipe;
3. The lap length of the long and short sides of the coil is ≥10cm, and the lap seam is tight, without wrinkles, warping edges and hollow drums;
4. The thickness of the protective layer meets the design requirements.
5. Masonry structure
Aerated concrete block wall model:
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Standard of Practice:
1. Before masonry, all kinds of bricks need to be moistened with water in advance according to the corresponding requirements;
2. Control the position of masonry with elastic line, and control the number of layers of masonry with skin number rod;
3. The masonry ash joints are full, and the top oblique bricks are dense;
4. The bottom platform is built with sintered ordinary bricks or porous bricks, and the bottom platform of the bathroom, kitchen and other rooms with waterproof requirements needs to be poured with concrete.
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Quality Standards:
1. Allowable deviation of masonry axis displacement: 10mm, masonry verticality: 5mm, surface flatness: 8mm;
2. Mortar fullness: horizontal seam: ≥90%, vertical seam ≥80%;
3. Width of ash joint: 8mm~12mm, ash crack of pressurized steam block: horizontal: 15mm, vertical: 20mm;
4. The height of the platform should not be less than 200mm.
5. The extension of the tie bar into the wall should not be less than 1000mm.
Structural Column Template:
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Standard of Practice:
1. The retention position, steel bar specification and spacing of the structural column meet the design requirements;
2. The structural column should be poured densely, and the strength should meet the requirements of the specification;
3. The masonry of the structural column brick shall be set up with a horse tooth chauffeur according to the specified requirements.
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Quality Standards:
1. The size of the wall retreat at the position of the structural column is 6cm;
2. The double-sided tape should be pasted along the position of the horsetooth to prevent slurry leakage, and the structural column template should be connected by a tie rod at the structural column, and the masonry hole is prohibited;
3. There are no quality defects such as exposed ribs and honeycomb surface on the concrete surface of the structural column.
Prefabricated lintel sample:
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Standard of Practice:
1. The length, cross-sectional size, steel bar specifications and spacing of prefabricated lintels should meet the design requirements;
2. The prefabricated lintel should be poured densely, and the strength should meet the requirements of the specification;
3. The lintel should be controlled and positioned during installation.
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Quality Standards:
1. Before the installation of the lintel, the strength of the lintel should be tested to meet the design requirements;
2. Skids should be added at both ends of the lintel to prevent damage to the components;
3. When installing the lintel, the positioning size should be controlled by elastic lines at both ends of the lintel, and the length of the supporting points at both ends should be consistent and meet the design requirements;
4. When installing lintels and beam pads, their elevation, position and model must be accurate, and the ash is full, such as when the thickness of the ash is more than 2cm, it is necessary to pave the mat with bean stone concrete.
The pictures and texts are from the Internet and are for reference only