The net distance deviation between double-layer reinforcement mesh shall not be greater than 3mm; 6.
Quality standard: 1.
Snap lines on the ground to control the spacing of main reinforcement; 2.
The allowable deviation of the spacing of stressed reinforcement is within ± 10mm, and the allowable deviation of row spacing is within ± 5mm; 3.
The deviation of formwork installation shall comply with the specifications.
Quality standard: 1.
Quality standard: 1.
The top formwork support of ladder reinforcement shall be painted with antirust paint.
The straight edge controls the position and spacing of stirrups; 3.
The binding wire is bent towards the inner side of the beam.
5.
Binding practice standard of wall reinforcement: 1.
After the thread is processed, it shall be protected with a protective cover; 3.
The thickness deviation of the protective layer shall not be greater than ± 10mm, and the reinforcement shall not contact the bottom plate or side formwork to prevent water seepage and corrosion; 3.
The specification, quantity and spacing of reinforcement meet the design requirements; 2.
Reinforcement blanking adopts toothless saw cutting, and the end face is straight; 2.
The specification and quantity of reinforcement meet the design requirements; 2.
The binding screw thread shall be free of missing binding, and the binding wire elbow shall face inward; 5.
The axis offset at the joint shall not be greater than 0.1 times the diameter of the reinforcement, and shall not be greater than 2mm.
The reinforcement hook faces the inner side of the concrete; 7.
The reinforcement sleeve is qualified, the reinforcement thread processing tooth shape is full, and there are no broken teeth, bald teeth and other defects.
The binding thread shall be free from missing binding, and the binding thread shall be bent inward.
Formwork engineering 1.
2.
Check the allowable deviation of formwork after formwork installation: within 5mm of axis position; Section size: + 4mm to – 5mm; 3.
The allowable deviation of the spacing of stressed reinforcement is within ± 10mm; The allowable deviation of row spacing is within ± 5mm; 3.
Quality standard: 1.
3.
Practice standard of electroslag pressure welding of reinforcement: 1.
6.
The vertical reinforcement hook faces the inner side of the column; 5.
Fully inspect the formwork joints and the application of isolating agent; 2.
Cement cushion block or crushed marble cushion block is used at the bottom, and plastic or other cushion blocks are used at the side to control the thickness of the protective layer; 3.
Check the qualification certificate of welding equipment and flux and the job certificate of construction personnel; 2.
The relative position of horizontal reinforcement and vertical reinforcement shall meet the requirements of the drawing; 5.
Quality standard: 1.
Binding practice standard of ground beam reinforcement: 1.
Quality standard: 1.
No more than one complete wire shall be exposed at each end after connection; 4.
The allowable deviation of height difference between adjacent formwork surfaces is within 2mm; The surface flatness shall not be greater than 5mm; 4.
The welding process and welding parameters shall be formulated in advance before construction; 2.
5.
The flatness of the upper row of reinforcement measured with a level gauge shall not be greater than 5mm / 2m to ensure the thickness of reinforcement protective layer; 5.
The allowable deviation of the spacing of stressed reinforcement is within ± 10mm; The allowable deviation of row spacing is within ± 5mm; The allowable deviation of stirrup spacing is within ± 20mm; The allowable deviation of protective layer thickness is within ± 5mm; 3.
Cement cushion blocks are used at the bottom, and plastic or other cushion blocks are used at both sides of the beam to control the thickness of the protective layer; 3.
Two interconnected reinforcement ribs shall be in a straight line.
Binding practice standard of bottom plate reinforcement: 1.
The end of reinforcement shall be perpendicular to the axis without horseshoe shape or deflection; 2.
The roof formwork shall be arched according to 1 / 1000 ~ 3 / 1000 of the span..
Before welding construction, formulate construction scheme and clarify welding process and parameters; 3.
Control the spacing of wall reinforcement through horizontal and vertical ladder reinforcement; 2.
The allowable deviation of reinforcement cover thickness is within ± 3mm; 4.
5.
The spacing of erection bars shall meet the requirements of the construction scheme to ensure that the upper row of bars will not collapse; 5.
Check one by one and mark with paint after passing the inspection.
The specification and quantity of reinforcement meet the design requirements; 2.
Snap line to control the spacing between main reinforcement and stirrup; 2.
The overlap of stirrup hooks is staggered on the four corner vertical reinforcement; 6.
Determine the upper and lower positions of the upper and lower rows of two-way reinforcement according to the design requirements; 4.
Ladder reinforcement shall be set in the middle of double-layer reinforcement mesh to fix the reinforcement spacing.
If the upper and lower rows of reinforcement are arranged in double layers, a short reinforcement of not less than 25mm shall be placed between the two rows of reinforcement.
The bending angle at the joint shall not be greater than 4 °; 5.
Reinforcement engineering 1.
The corner vertical reinforcement hook forms a 45 ° angle with the formwork, and the middle reinforcement hook forms a 90 ° angle with the formwork.
Determine the position and spacing of hook bars; 4.
There shall be no mortar leakage at the formwork joint; Adopt hard joint; 2.
Cushion blocks are used to control the thickness of the protective layer, and the cushion blocks are arranged in quincunx shape; 3.
The specification and quantity of reinforcement meet the design requirements; 2.
The binding screw thread shall be free from missing binding, and the binding wire elbow shall face inward.
The binding thread shall be free from missing binding, and the binding thread shall be bent inward.
Use cushion block to control the thickness of protective layer; 4.
Practice standard of wood formwork: 1.
The socket connection adopts torque wrench connection, and the tightening torque value meets the specification requirements; 4.
The allowable deviation of reinforcement cover thickness is within ± 5mm; 4.
Reinforcement such as frame beam, corbel and column cap shall be placed inside the longitudinal reinforcement of the column.
The welding package shall be uniform and free from pores, burns and downward flowing of the welding package.
Binding practice standard of column reinforcement: 1.
4.
The binding wire shall not be missed; 6.
The height of the surrounding welding package protruding from the reinforcement surface shall be greater than or equal to 4mm; 4.
The allowable deviation between the length and width of stressed reinforcement mesh is within ± 10mm; The allowable deviation of mesh size is within ± 20mm; The allowable error of stirrup spacing is within ± 20mm; 4.
The reinforcement axis shall not be offset, the reinforcement shall not be bent, and the reinforcement shall not be undercut or not welded; 3.
The binding wire is bent towards the inner side of the wall; 6.
The formwork shall be painted with isolating agent before use; 3.
Control the position of main reinforcement of column through column positioning frame; 2.
Quality standard: 1.
Connection method standard of reinforcement sleeve: 1.
The tightening torque value of torque wrench meets the specification or design requirements, and the accuracy of torque wrench is ± 15%; 3.
