Project name of the construction unit Project name Cast-in-place frame structure steel binding? The disclosure is 6 pages in total. Organizer or team organizer: Disclosure unit or department:? Disclosure: 1. Project Overview This project is a four-story industrial building, with a dynamic compaction foundation and independent column concrete foundation. The main body is a cast-in-place reinforced concrete frame structure, with a seismic fortification of seven degrees and a frame seismic grade of three. The construction drawing of this project is designed and made according to the standard atlas 96G 10 1 Rules for Legal Drawing and Structural Detail Drawing of Concrete Structure Construction Drawing, which should be used in combination with site construction. Second, construction preparation materials and main machines and tools: 1. Steel bar: It shall have the factory certificate, and the mechanical properties shall be reinspected as required. When special circumstances such as brittle fracture occur during processing, it is necessary to carry out chemical composition inspection. Steel bars shall be free of old rust and oil stain. 2. Molded reinforcement: It must conform to the specifications, size, shape and quantity of the construction drawing. 3. Iron wire: No.20 ~ No.22 iron wire (burnt wire) or galvanized iron wire (lead wire) can be used. The cutting length of iron wire should meet the use requirements. 4. Pad: made of cement mortar, 50mm square, with the same thickness as the protective layer, and 20~22 fire wires are embedded in the pad. Or use plastic cards, braces, and support rods. 5. Main machines and tools: steel hook, crowbar, wrench, binding frame, wire brush, trolley, chalk, ruler, etc. Operating conditions: 1. After reinforcement comes into play, check whether there is factory certificate and retest report, and pile them with stow-wood according to the position specified in the construction plan, specification, use position and number. 2. Before steel binding, check whether there is rust, and transport it to the binding site after rust removal. 3. Be familiar with the drawings, and check whether the specifications, shapes and quantities of the processed steel bars are correct according to the design requirements. 4. Do a good job of leveling, and play the horizontal elevation lines, columns and skin-filling dimension line. 5. According to the played skin dimension line, check the position, quantity and length of the lower reserved lap reinforcement. Do not meet the requirements, should be dealt with. Before binding, straighten out the overlapping reinforcement extending from the lower layer, and remove dirt such as rust and cement mortar. 6. According to the elevation, check whether the elevation of the concrete surface (column top and wall top) where the lower layer extends out of the lap steel bar meets the requirements of the drawings. If there is any looseness or falsehood, it should be removed and cleaned up. 7. The template is installed and pre-checked, and the impurities in the template are cleaned up. 8. Set up scaffolding as required. 9. According to the requirements of design drawings and process standards, make technical disclosure to the team. Three. Operation technology: binding column rebar: 1. Technological process: setting column stirrups, overlapping and binding vertical reinforced bars, drawing stirrup spacing lines and binding stirrups. 2. Setting column stirrups: According to the spacing required by the drawings, calculate the number of stirrups for each column. First, put the stirrups on the overlapping steel bars protruding from the lower layer, then tie the column bars at least three times within the overlapping length, and tie the buckles at the center of the column. 3. Lapping and binding of vertically stressed steel bars: After the main reinforcement of the column is installed, the lap length of the binding joint should meet the design requirements. If there is no design requirement, it shall be adopted according to the following table. What is the lap length of the binding joint of tensile reinforcement? Tendon? Class? Type I concrete strength grade C20 C25C30 1 first-class reinforcement 35D3D25D2 second-class reinforcement (crescent) 4540D3 third-class reinforcement (crescent) 5550D45Note: 1. When the first and second grade rebar D >: 25mm, the lap length should be increased by 5d according to the values in the table. ? 2. When the diameter of the threaded steel bar is [25mm], the lap length of the tensile steel bar shall be reduced by 5d according to the values in the table. 3. In any case, the lap length shall not be less than 300mm. The positions of binding joints shall be staggered. From the center of any binding joint to the section with overlapping length of 1.3 times, the percentage of the cross-sectional area of steel bar with binding joint to the total cross-sectional area of steel bar: the tensile area shall not exceed 25%; The compression zone shall not exceed 50%. When welded joints are used, from the center of any welded joint to the section with the length of 35 times the diameter of steel bar and not less than 500mm, the area of welded steel bar accounts for the percentage of the total area of steel bar: the tensile area should not exceed 50%; The compression zone is not limited. 4. Draw the stirrup spacing line: draw the stirrup spacing line with chalk on the vertical bar of the column that has been erected. 5. Column stirrup binding: a. According to the drawn stirrup position line, move the set stirrup upward and bind it from top to bottom, and it is advisable to bind it with buckles. B stirrups should be perpendicular to the main reinforcement, the intersection of stirrup corner and main reinforcement should be bound, and the intersection of main reinforcement and stirrup non-corner part should be staggered and bound into a plum blossom shape. C the hook lap of stirrups should be staggered along the vertical reinforcement of the column, and tied firmly. D In areas with seismic requirements, the stirrup end of the column should be bent into 1350, and the length of the straight part should not be less than 10d(d is the stirrup diameter). When 900 lap joints are used for stirrups, lap joints shall be welded, and the length of single-sided welded joints shall not be less than 5d. E stirrups at the upper and lower ends of the column should be encrypted, and the length and spacing of stirrups in the encrypted area should meet the requirements of design drawings. If the design requires stirrups to be provided with lacing bars, the lacing bars should be hooked on the stirrups. F. The protective layer thickness of column rebar should meet the specification requirements. The protective layer thickness of main rebar is 25mm, and the pad should be tied to the column vertical rebar, and the spacing is generally 1000mm (or plastic card is used on the lateral vertical rebar) to ensure the accurate protective layer thickness of main rebar. When the column section size changes, the column should be bent in the plate, and the bending size should meet the design requirements. Binding shear wall reinforcement: 1. Technological process: erect 2~4 vertical bars, draw the spacing of horizontal bars, tie the horizontal bars at the binding position, and tie other horizontal and vertical bars. 2~4 vertical bars: tie the vertical bars with overlapping bars protruding from the lower layer, draw horizontal bar grading marks on the vertical bars, tie two horizontal bars at the lower part and chest level for positioning, draw vertical bar grading marks on the horizontal bars, and then tie the rest vertical bars. Transverse reinforcement should meet the design requirements on the inside or outside of vertical reinforcement. 3. Three horizontal steel bars shall be bound at the lap of vertical steel bars and extended lap steel bars, and the lap length and position shall meet the design requirements. If there is no requirement in the design, the construction shall be carried out according to the following table. Project steel? Tendon? Class? Class I concrete strength grade C20 C25 C30 1 I reinforcement 35d(30d) 30d(25d) 25d(20d)2 II reinforcement (crescent) 45d 40d 35d3 III reinforcement (crescent) 55d 50d 45d? 4. Shear wall reinforcement shall be bound point by point, bracing or supporting reinforcement shall be bound between double rows of reinforcement, and the vertical and horizontal spacing shall not be greater than 600mm, and the reinforcement sheath shall be bound with pad or plastic card. 5. At the joint of shear wall and frame column, the horizontal bar of shear wall should be anchored in the frame column, and its anchoring length should meet the design requirements. For example, when pouring column concrete first and then binding shear wall reinforcement, it is necessary to reserve connecting reinforcement in the column or embed iron pieces in the column as the connection when dismantling column and binding wall reinforcement. Its reserved length should comply with the provisions of the design or specification. 6. The anchorage length of horizontal reinforcement of shear wall at both ends, corners, cross joints, coupling beams and surrounding reinforcement of the hole should meet the design seismic requirements. 7. After closing the mold, the protruding vertical steel bar should be trimmed, and a transverse steel bar should be tied at the lap joint for positioning. When pouring concrete, there should be special personnel to take care of it, and it should be adjusted again after pouring to ensure the accurate position of steel bars. Beam reinforcement binding: 1. Technological process: In-mold binding: draw the stirrup spacing between primary and secondary beams, put it into the stirrup of primary and secondary beams, pass through the longitudinal bars at the bottom of primary and secondary beams, bend the steel bars, fix them with stirrups, vertically erect the steel bars at the upper part of primary and secondary beams, bind the longitudinal bars at the upper part of secondary beams according to the stirrup spacing, and bind them outside the mold according to the stirrup spacing (first, tie them at the upper mouth of beam formwork and then put them into the mold): draw the stirrup spacing, put a number of cross bars at the upper mouth of primary and secondary beams, and pass through the lower part of secondary 2. Draw the stirrup spacing on the beam side formwork and place the stirrup. 3. First, pass through the longitudinal stress reinforcement and bending reinforcement at the lower part of the main girder, and separate the stirrups one by one according to the drawn spacing; Wear the longitudinal stressed steel bars and bent steel bars at the lower part of the secondary beam, and set stirrups; Put the scissors of primary and secondary beams; Tie up the installation stud and stirrup at regular intervals; Adjust the stirrup spacing to meet the design requirements, tie the vertical reinforcement, then tie the main reinforcement, and coordinate the primary and secondary beams. 4. The upper longitudinal reinforcement of the frame beam should run through the middle node, and the anchorage length of the lower longitudinal reinforcement of the beam should meet the design requirements. The anchorage length of longitudinal reinforcement of frame beam at the node moving in the wind should also meet the design requirements. 5. Tie the stirrups of longitudinal reinforcement on the upper part of the beam, and tie them by buckle method. 6. The stirrup hooks at the lap joint are bound in the beam in a staggered way, with the stirrup hooks being 1350 and the length of the straight part being 10d. If the closed hoop is made, the length of one-sided weld is 5d. 7. The first stirrup at the beam end should be set 50mm away from the edge of the column node. The stirrup at the joint of beam end and column should be encrypted, and its spacing and encryption zone length should meet the design requirements. 8. Cushion blocks (or plastic cards) should be placed under the stressed steel bars of the main beam and the secondary beam to ensure the thickness of the protective layer. When the stressed steel bars are in double rows, short steel mesh can be used between the two layers of steel bars, and the row spacing of steel bars should meet the design requirements. 9. Lapping of beam reinforcement: When the diameter of the stressed reinforcement of the beam is equal to or greater than 22mm, welded joints shall be adopted; When it is less than 22mm, a binding joint can be adopted, and the lap length should comply with the regulations. The distance between the end of the lap length and the bend of the steel bar should not be less than 10 times the diameter of the steel bar. The joint should not be located at the maximum bending moment of the member. In the tension zone, the end of the binding joint of Grade I steel bar should be hooked (Grade II steel bar is not required to be hooked), and the lap joint should be fastened at the center and both ends. The positions of the joints should be staggered. When binding lap joints are used, the percentage of the total cross-sectional area of the reinforced bar with joints on any section with specified lap length should not be greater than 50%. Plate reinforcement binding: 1. Technological process: clean the formwork, draw lines on the formwork, tie the reinforced bar under the slab, and tie the reinforced bar with negative bending moment. 2. Clean up the sundries on the template, draw the main reinforcement on the template with chalk, and distribute the spacing of reinforcement. 3. According to the planned spacing, put the main reinforcement first, and then put the distribution reinforcement. Embedded parts, electrical conduits and reserved holes shall be installed in time. 4. When the cast-in-place slab has a slab beam, the slab beam reinforcement shall be bound first, and then the slab reinforcement shall be placed. 5. Plate reinforcement is generally tied with straight buckle or splayed buckle. Except for the intersection of two steel bars at the periphery, other points can be bound alternately (the intersection of two-way slabs must be bound completely). If the floor is a double-layer reinforced bar, a reinforced horse stool should be added between the two layers of reinforced bars to ensure the position of the upper reinforcement. Each intersection of negative moment reinforcement shall be bound. 6. The reinforced bar shall be padded with mortar pads with the spacing of 1.5m, and the thickness of the pads shall be equal to the thickness of the protective layer, which shall meet the design requirements. When there is no requirement in the design, the thickness of the protective layer of the plate should be 15mm, and the requirements for the lap length and lap position of steel bars are the same as those of the beam mentioned above. Stair reinforcement binding: 1. Process flow: 2. Draw the position lines of main reinforcement and distribution reinforcement on the stair floor. 3. According to the direction of main reinforcement and distribution reinforcement in the design drawings, tie the main reinforcement first and then the distribution reinforcement, and tie each intersection. If there is a stair beam, tie the beam first, and then tie the slab reinforcement. Plate reinforcement should be anchored in the beam. 4. After the bottom plate reinforcement binding is completed, after the step template is hoisted, the step reinforcement is bound. The number and location of main reinforcement joints shall comply with the provisions of construction specifications. Iv. quality standard guarantee project: 1. The variety and quality of steel bars must meet the design requirements and the provisions of relevant standards. 2. The surface of the steel bar must be clean. After derusting, it is forbidden to use the reinforcement with granular or flaky old rust and pockmarks according to the original specifications. Steel surface should be kept clean. 3. The specification, shape, size, quantity, anchorage length and joint position of reinforcement must meet the design requirements and construction specifications. 4. The results of mechanical properties of welded joints of steel bars must conform to the special provisions on welding and acceptance of steel bars. Basic item: 1. The number of missing buttons and loose buttons shall not exceed 10% of the number of tied buttons, and shall not be concentrated. 2. The hook orientation should be correct, the binding joint should comply with the provisions of the construction specification, and the lap length should not be less than the specified value. 3. The number of stirrups should meet the design requirements. When the seismic requirements are met, the hook angle is 1350 and the straight line length of the hook is
10d.4. Butt-welded joints of rebar, I, II and III rebar have no burns and transverse cracks, and the welding package is uniform. The bending of the welded joint is not more than 40, and the deviation of the steel bar axis at the welded joint is not more than 0. 1d and not more than 2mm. Allowable deviation project Cast-in-place frame steel binding allowable deviation component project allowable deviation (mm) inspection? Testing? Fang? Method 1 length and width of measuring net 6 10 foot. 2. Measure the grid size of three consecutive files by 620 feet, and take the maximum value of 3. Measure the width and height of the bone at 65 feet. 4. Measure the length of bone 6 10 5. Measure the distance 6 10 foot between the reinforced bars at both ends and in the middle. The maximum distance of 6 rows is 65 7, and the distance between the stirrup and the structural reinforcement is 620 feet. The maximum distance of 8 is 20 feet to check the displacement of the bending starting point of the reinforcement, 9 is to check the displacement of the center line of the welded embedded parts, 5 is the horizontal height difference +3-0 10, the beam is the reinforcement protection layer, the column is 65, and the wallboard is 63, 5 is the finished product protection. 1 0. After the column reinforcement is bound, trampling is not allowed. 2. After the bent steel bar of the floor is tied with the negative bending moment steel bar, it is not allowed to walk on it. When pouring concrete, assign reinforcement workers to repair it to ensure the correctness of the negative bending moment reinforcement position. 3. When binding reinforcement, it is forbidden to touch the embedded parts and the template of the hole. 4. When the steel formwork is coated with isolation agent, don't pollute the steel bar. 5. When installing electric conduits, heating pipes or other facilities, steel bars shall not be cut and moved arbitrarily. 6. Attention should be paid to the quality of 1. Before pouring concrete, check whether the position of reinforcement is correct, and prevent it from touching the reinforcement when vibrating concrete. After pouring concrete, immediately trim the position of reinforcement on the left side to prevent the displacement of column reinforcement and wall reinforcement. 2. The size of the beam reinforcement skeleton is smaller than the design size: stirrups should be calculated according to the endothelial size. 3. The stirrups in the core areas of beams and columns should be encrypted and familiar with the construction drawings as required. 4. The end of stirrup should be bent into 1350, and the length of straight part is 10d. 5. The length of the main beam reinforcement should meet the design requirements, and the position of the bent reinforcement should be accurate. 6. The position of the bent steel bar and negative bending moment steel bar of the plate shall be accurate, and the following shall not be trampled during construction. 7. When the steel bars of the plate are tied, draw lines with a ruler. When binding, look straight at any time to prevent the steel bar from being straight and out of position. 8. When binding the vertical reinforced bar, it should be hung upright, and the overlapping parts should be tied with three buttons, and the straight buttons in the same direction cannot be used. When the storey height is more than 4m, erection and binding shall be carried out, and measures shall be taken to fix the reinforcement to prevent the column and wall reinforcement skeleton from being vertical.
9. Pay attention to ingredients when processing steel bars. When there are butt joints at both ends, the overlapping range should be avoided to prevent the butt joints from mixing into the binding joints. Seven. Safety measures 1. Ten disciplines of safety production must be observed when entering the site. 2. Steel bar cutting, batching and bending should be carried out on the ground, and aerial work is not allowed. 3. Pay attention to whether there are obstacles, overhead wires and other temporary electrical equipment nearby when carrying steel bars, so as to prevent the steel bars from colliding with wires or getting an electric shock accident when rotating. 4. When binding independent column reinforcement, it is not allowed to stand on the steel hoop for binding, and it is not allowed to wear wood, pipes and templates as vertical plates in the steel hoop. 5. When hoisting steel bars, the specifications must be uniform, uneven length is not allowed, and hoisting is not allowed at all. It is forbidden to stand below, and the reinforcement is allowed to approach when it drops below the formwork 1 m, and the hook can be unhooked only after the support is in place. 6. Before using the machine, you must check whether the machine is running normally and whether there is any leakage. The power cord must be connected to the leakage switch, and flammable items are not allowed to pile up behind the cutting machine. 7. The steel picking should be cleaned in time, the finished products should be neatly stacked, the workbench should be stable, and the lighting of the steel barrack must be covered with a net. 8. When working high above the ground, steel bars shall not be concentrated on the formwork and scaffolding, and tools, steel hoops and short steel bars shall not be placed on the scaffolding at will, so as not to slide down and hurt people. 9. When there is a thunderstorm, outdoor operation must be stopped to prevent lightning strike on steel bars. ? 65438+ ? 1 1. Don't place tools, stirrups or short steel bars on the scaffold at will, so as not to place them unsteadily, and the steel bars of tools will fall and hurt people. ? 12. When binding overhangs, external walls and side columns, an outer frame and a safety net shall be erected, and the safety belt shall be hung when binding. ? 13. There should be enough lighting for construction at night. Lamps and lanterns are not allowed to be hung on erected steel bars or other metal components, and wires should be overhead.