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GB 50628-2010: Code for quality acceptance of the concrete filled steel tubular engineering
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Code for quality acceptance of the concrete filled steel tubular engineering
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GB 50628-2010
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Basic data | Standard ID | GB 50628-2010 (GB50628-2010) | | Description (Translated English) | Code for quality acceptance of the concrete filled steel tubular engineering | | Sector / Industry | National Standard | | Classification of Chinese Standard | P25 | | Word Count Estimation | 63,620 | | Date of Issue | 2010-11-03 | | Date of Implementation | 2011-10-01 | | Quoted Standard | GB 50204; GB 50205; GB 50300; GB/T 3323; GB 11345 | | Regulation (derived from) | Bulletin of the Ministry of Housing and Urban No. 810 | | Issuing agency(ies) | Ministry of Housing and Urban-Rural Development of the People's Republic of China; General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China | | Summary | This Chinese standard applies to the construction steel concrete construction quality acceptance. | GB 50628-2010: Code for quality acceptance of the concrete filled steel tubular engineering---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
1 General
1.0.1 In order to strengthen the construction quality management of construction projects, unify the acceptance of the construction quality of steel pipe concrete projects, and ensure the project quality, this specification is formulated.
1.0.2 This code is applicable to the acceptance of construction quality of concrete filled steel pipe works in construction projects.
1.0.3 This specification shall be used in conjunction with the current national standard GB 50300 "Unified Standard for Construction Quality Acceptance of Construction Engineering".
1.0.4 The acceptance of the construction quality of steel pipe concrete projects shall not only comply with this specification, but also comply with the provisions of the current relevant national standards.
2 terms
2.0.1 Steel tubular concrete filled member
A structural member in which concrete is poured in a steel pipe and the steel pipe and the concrete in the pipe work together.
2.0.2 concrete in the steel tube
Concrete poured in steel pipes with certain work performance requirements.
2.0.3 through-type steel tubular joint
At the joints between the concrete-filled steel tube columns and the reinforced concrete beams, the steel tube columns on the upper and lower floors adopt the column-beam joints of concrete-filled steel tubes that directly penetrate the core area of the column-beam joints.
2.0.4 part-through type steel tubular joint
At the joint between the concrete-filled steel tube column and the reinforced concrete beam, the steel tube columns on the upper and lower floors do not directly pass through the core area of the column-beam joint, but use small-diameter thick-walled steel tubes, steel plate fins, etc. to connect the upper and lower concrete-filled steel tube columns at the core area of the column-beam joint, The converted column-to-beam junction is reached. Also known as a transition connection node.
2.0.5 Steel plate fin fin
In the non-penetrating joints of steel tube columns at the joints of steel tube concrete columns and reinforced concrete beams, the steel tube columns do not penetrate the core area of the column beam joints, and are used for the steel plate ribs for the conversion connection of the upper and lower steel tube concrete columns.
3 Basic Regulations
3.0.1 The construction of concrete filled steel pipe projects shall be undertaken by enterprises with corresponding qualifications. The construction quality inspection of concrete filled steel pipe projects should be undertaken by institutions with engineering structure inspection qualifications.
3.0.2 The construction drawing design documents of concrete filled steel pipe shall be reviewed and approved by the organization with the construction drawing design review permit. The detailed design documents of the construction unit shall be confirmed by the original design unit.
3.0.3 Before the construction of the concrete filled steel pipe project, the construction unit shall prepare a special construction plan, which shall be confirmed by the supervision (construction) unit. During winter, rainy and high temperature construction, seasonal construction technical measures should be formulated.
3.0.4 The materials of steel pipes, steel plates, steel bars, connecting materials, welding materials and concrete filled steel pipes shall comply with the design requirements and the current relevant national standards.
3.0.5 The manufacture of steel pipe components shall comply with the relevant provisions of the current national standard "Code for Construction Quality Acceptance of Steel Structure Engineering" GB 50205.Components leaving the factory shall undergo acceptance inspection according to regulations, and form a factory acceptance record. If pre-assembly is required, it shall be pre-assembled and recorded.
3.0.6 Welders must pass the examination and obtain the qualification certificate, and the certified welders must perform welding within the scope specified in the qualified items of the examination and the qualification certificate
3.0.7 The primary and secondary welds that require full penetration in the design shall be inspected for internal defects of the welds by ultrasonic flaw detection, and radiographic flaw detection shall be used when the defects cannot be judged by ultrasonic flaw detection. The internal defect classification and flaw detection shall comply with the relevant provisions of the current national standards "Manual ultrasonic flaw detection methods and flaw detection results classification of steel welds" GB 11345 and "Radiography of Metal Fusion Welded Joints" GB/T 3323.The quality grade and defect classification of the first and second grade welds shall comply with the provisions in Table 3.0.7
3.0.8 The hoisting sequence of concrete-filled steel tube members and the pouring sequence of concrete inside the steel tube shall meet the requirements of structural strength and stability.
3.0.9 Before the construction of the concrete in the steel pipe, the mix ratio design should be carried out, and the pouring process test should be carried out; the pouring method should be compatible with the structural form.
3.0.10 After the steel pipe components are installed, anti-corrosion and fire-proof coating should be carried out according to the design requirements. Its quality requirements and inspection methods shall comply with the relevant provisions of the current national standard "Code for Construction Quality Acceptance of Steel Structure Engineering" GB 50205.
3.0.11 The construction quality acceptance of concrete filled steel pipe projects shall be checked and accepted by the supervision (construction) unit on the basis of the construction unit's own inspection and assessment. The procedures should be checked and accepted according to the current national standard "Unified Standard for Construction Quality Acceptance of Construction Engineering" GB 50300.Concrete filled steel tube sub-divisions shall be divided into sub-projects according to the provisions in Table 3.0.11.
4 Quality acceptance of concrete filled steel pipe sub-projects
4.1 Inspection and acceptance of steel pipe components
master project
4.1.1 The acceptance of steel pipe components should be carried out when they enter the site, and the quality of their processing and manufacturing should meet the design requirements and the contract.
Inspection Quantity. Full inspection.
Inspection method. check the factory acceptance record.
4.1.2 When steel pipe components enter the site, the quantity of components and accessories shall be checked according to the installation process.
Inspection Quantity. Full inspection.
Inspection method. Check the number of components and accessories according to the installation process list.
4.1.3 The specification and quantity of steel plate fins, stiffening ribs, studs and pipe wall openings on steel pipe members shall meet the design requirements.
Quantity to be inspected. 10% of the same batch of components shall be randomly inspected, and no less than 3 pieces.
Inspection method. scale inspection, observation inspection and inspection of factory acceptance records.
General project
4.1.4 There should be no deformation, paint peeling, etc. caused by transportation and stacking of steel pipe components.
Quantity to be inspected. 10% of the same batch of components shall be randomly inspected, and no less than 3 pieces.
Inspection method. observation inspection.
4.1.5 When the steel pipe member enters the site, the size deviation of the member shall be randomly checked, and the allowable deviation shall comply with the provisions in Table 4.1.5.
Quantity to be inspected. 10% of the same batch of components shall be randomly inspected, and no less than 3 pieces.
Inspection method. see Table 4.1.5.
4.2 On-site assembly of CFST members
master project
4.2.1 When the CFST members are assembled on site, the specifications, positions and quantities of the various accessories of the CFST members shall meet the design requirements.
Inspection Quantity. Full inspection.
Inspection method. observation inspection, ruler inspection.
4.2.2 The assembly method, procedure and welding method of CFST components shall comply with the design and special construction plan requirements.
Inspection Quantity. Full inspection.
Inspection method. observation inspection, inspection of construction records.
4.2.3 The welding consumables for welding concrete-filled steel tube members should match the base metal, and should meet the design requirements and the relevant provisions of the current national standard "Code for Construction Quality Acceptance of Steel Structure Engineering" GB 50205.
Inspection Quantity. Full inspection.
Inspection method. Check the construction records.
4.2.4 The weld quality of the assembled and welded steel pipe concrete members shall meet the design requirements and the relevant provisions of the current national standard "Code for Construction Quality Acceptance of Steel Structure Engineering" GB 50205.The primary and secondary welds required by the design shall comply with the provisions of Article 3.0.7 of this code.
Inspection Quantity. Full inspection.
Inspection method. check construction records and weld inspection reports.
General project
4.2.5 Control measures such as flatness and control lines of the assembly site of concrete filled steel tube members shall meet the requirements of the special construction plan.
Inspection Quantity. Full inspection.
Inspection method. perception inspection, ruler inspection.
4.2.6 The appearance quality of the secondary and tertiary welds for on-site assembly and welding of CFST members shall comply with the provisions in Table 4.2.6.
Quantity to be inspected. 10% of the same batch of components shall be randomly inspected, and no less than 3 pieces.
Inspection method. observation inspection, ruler inspection.
4.2.7 The butt weld and fillet weld reinforcement and misalignment allowable deviation of CFST members shall comply with the provisions in Table 4.2.7.
Quantity to be inspected. 10% of the same batch of components shall be randomly inspected, and no less than 3 pieces.
Inspection method. weld gauge inspection.
4.2.8 The permissible deviation of on-site assembly of CFST members shall comply with the provisions in Table 4.2.8.
Quantity to be inspected. 10% of the same batch of components shall be randomly inspected, and no less than 3 pieces.
Inspection method. see Table 4.2.8.
4.3 Anchorage of steel tube concrete column foot
master project
4.3.1 The structure, embedding depth and concrete strength of the embedded concrete-filled steel tube column foot shall meet the design requirements.
Inspection Quantity. Full inspection.
Inspection method. observation inspection, scale inspection, inspection of concrete specimen strength report.
4.3.2 The structure of the end-supported concrete-filled steel tube column foot and the type, specification, quantity and location of the connecting anchors shall meet the design requirements. The quality of stud bolt connection and welding shall comply with the design requirements and the relevant provisions of the current national standard "Code for Construction Quality Acceptance of Steel Structure Engineering" GB 50205.
Inspection Quantity. Full inspection.
Inspection method. observe and inspect, check the acceptance record of the pre-embedded steel plate at the base of the column.
General project
4.3.3 When the column foot of the embedded concrete-filled steel tube column has anchor reinforcement in the pipe, the length and hook of the anchor reinforcement shall meet the design requirements.
Inspection Quantity. Full inspection.
Inspection method. check the construction records and concealed project acceptance records.
4.3.4 After the foot of the end-supported concrete-filled steel tube column is installed in place and the anchor bolts are tightened, the grouting under the end plate shall be carried out in time according to the design requirements.
Inspection Quantity. Full inspection.
Inspection method. observation inspection, inspection of construction records.
4.3.5 The permissible installation deviation of the column foot of the steel tube concrete column shall comply with the provisions in Table 4.3.5.
Quantity to be inspected. Randomly inspect 10% of the components in the same batch, and not less than 3 places.
Inspection method. ruler inspection.
4.4 Installation of CFST members
master project
4.4.1 The sequence of hoisting and concrete pouring of CFST components shall comply with the design and special construction plan requirements.
Inspection Quantity. Full inspection.
Inspection method. observation inspection, inspection of construction records.
4.4.2 Before the concrete-filled steel tube member is hoisted, the concrete strength of the foundation shall meet the design requirements. The hoisting of the concrete-filled steel tube members in the upper section of the multi-storey structure should be carried out after the concrete in the lower section of the steel tube meets the design requirements.
Inspection Quantity. Full inspection.
Inspection method. Check the report of the same condition curing test block.
4.4.3 Before the concrete-filled steel tube member is hoisted, the center line and elevation datum point of the steel-filled steel tube concrete member shall be marked completely; the setting of lifting points and temporary support points shall meet the requirements of the design and special construction plan.
Inspection Quantity. Full inspection.
Inspection method. observation inspection.
4.4.4 After the concrete-filled steel tube members are hoisted in place, they should be corrected and fixed firmly in time.
Inspection Quantity. Full inspection.
Inspection method. observation inspection.
4.4.5 The quality of welding and fastener connections of CFST components shall meet the design requirements and the relevant provisions of the current national standard "Code for Construction Quality Acceptance of Steel Structure Engineering" GB 50205.
Inspection Quantity. Full inspection.
Inspection method. scale inspection, inspection of final torque records of high-strength bolts, construction records and weld inspection reports.
4.4.6 The permissible deviation of verticality of CFST members shall comply with the provisions in Table 4.4.6.
Quantity to be inspected. 10% of the same batch of components shall be randomly inspected, and no less than 3 pieces.
Inspection method. see Table 4.4.6.
General project
4.4.7 Before hoisting concrete-filled steel pipe members, the sundries in the steel pipe should be removed, and the steel pipe mouth should be sealed tightly.
Inspection Quantity. Full inspection.
Inspection method. observation inspection.
4.4.8 The permissible deviation of the installation of CFST members shall comply with the provisions in Table 4.4.8.
Quantity to be inspected. 10% of the same batch of components shall be randomly inspected, and no less than 3 pieces.
Inspection method. see Table 4.4.8.
4.5 Connection between CFST column and reinforced concrete beam
master project
4.5.1 The structure of the core area of the joint between the CFST column and the reinforced concrete beam and the specification, position and quantity of the reinforcement shall meet the design requirements.
Inspection Quantity. Full inspection.
Inspection method. observation inspection, inspection of construction records and concealed project acceptance records
4.5.2 When the steel pipe concrete column and the reinforced concrete beam are connected by steel pipe through joints, the outer wall of the steel pipe in the core area shall meet the design requirements. If there is no design requirement, the outer wall of the steel pipe shall be welded with no less than two closed steel hoops, the diameter, position and welding quality of the hoop steel bars shall meet the requirements of the special construction plan.
Inspection Quantity. Full inspection.
Inspection method. observation inspection, inspection of construction records.
4.5.3 When the steel tube concrete column is connected to the reinforced concrete beam by non-penetrating joint of the steel tube column, the specifications, quantity, position and welding quality of the steel plate fins, thick-walled connecting steel tubes and stiffening ribs shall meet the design requirements.
Inspection Quantity. Full inspection.
Inspection method. observation inspection, ruler inspection and inspection of construction records.
General project
4.5.4 The longitudinal reinforcement of the beam passing through the core area of the CFST column shall meet the following requirements.
1 The position and spacing of the longitudinal reinforcement of the beam shall meet the design requirements;
2 The anchorage length of the longitudinal reinforcement of the side span beam shall meet the design requirements;
3 The longitudinal reinforcement of the beam should directly pass through the core area, and the connecting joints should not be arranged in the core area.
Inspection Quantity. Full inspection.
Inspection methods. observation inspection, measuring inspection and inspection of concealed project acceptance records.
4.5.5 The clear distance of beam longitudinal reinforcement passing through the core area of beam-column joints shall not be less than 40mm, and shall not be less than 1.5 times the particle size of concrete aggregate. The bending degree of the longitudinal reinforcement arranged around the steel pipe shall meet the design requirements.
Inspection Quantity. Full inspection.
Inspection method. observation inspection, ruler inspection.
4.5.6 The permissible deviation of the connection between the CFST column and the reinforced concrete beam shall comply with the provisions in Table 4.5.6.
Inspection Quantity. Full inspection.
Inspection method. see Table 4.5.6.
4.6 Steel skeleton inside the steel pipe
master project
4.6.1 The steel bar type, specification and quantity of the steel bar skeleton in the steel pipe shall meet the design requirements.
Inspection Quantity. Full inspection.
Inspection method. observation inspection, caliper measurement, inspection of product factory certificate and inspection of re-test report after entering the site.
4.6.2 The quality of steel bar processing, steel frame forming and installation shall comply with the provisions of GB 50204 "Code for Construction Quality Acceptance of Concrete Structure Engineering".
Quantity to be inspected. no less than 3 pieces of steel bars of the same type of processing form shall be randomly inspected in each work shift.
Inspection method. observation inspection, ruler inspection.
4.6.3 The position, anchorage length and distance between the reinforced steel bars and the pipe wall shall meet the design requirements.
Inspection Quantity. Full inspection.
Inspection method. observation inspection, ruler inspection.
General project
4.6.4 The size of steel frame and the allowable deviation of installation shall comply with the provisions in Table 4.6.4.
Quantity to be inspected. 10% of the same batch of components shall be randomly inspected, and no less than 3 pieces.
Inspection method. see Table 4.6.4.
4.7 Concrete pouring in steel pipes
master project
4.7.1 The strength grade of the concrete inside the steel pipe shall meet the design requirements.
Inspection Quantity. Full inspection.
Inspection method. check the test piece strength test report
4.7.2 The working performance and shrinkage of the concrete inside the steel pipe shall comply with the design requirements and the current relevant national standards.
Inspection Quantity. Full inspection.
Inspection method. Check the construction records.
4.7.3 The total time of concrete transportation, pouring and intermission in the steel pipe shall not exceed the initial setting time of the concrete, and the concrete in the steel pipe shall be poured continuously in the same construction section. When it is necessary to leave construction joints, they should be left according to the special construction plan.
Inspection Quantity. Full inspection.
Inspection method. observation inspection, inspection of construction records.
4.7.4 The pouring of concrete inside the steel pipe shall be dense.
Inspection Quantity. Full inspection.
Inspection method. check the concrete pouring process test report and concrete pouring construction records in the steel pipe.
General project
4.7.5 The setting of concrete construction joints in the steel pipe shall meet the design requirements. If there is no design requirement, it shall be stipulated in the special construction plan, and the steel pipe at the butt joint of the steel pipe column shall be more than 500mm higher than the surface of the concrete pouring construction joint, so as to High temperature affects the quality of concrete when the steel pipe is welded. The treatment of construction joints shall be carried out according to the special construction plan.
Inspection Quantity. Full inspection.
Inspection method. observation inspection, inspection of construction records.
4.7.6 The concrete pouring method in the steel pipe and the retention of pouring holes, jacking holes and vent holes shall meet the requirements of the special construction plan.
Inspection Quantity. Full inspection.
Inspection method. observation inspection, inspection of construction records.
4.7.7 Before the concrete pouring in the steel pipe, the installation quality of the steel pipe should be checked and confirmed, and the dirt on the inner wall of the steel pipe should be cleaned; after the concrete pouring, the pipe mouth should be temporarily closed.
Inspection Quantity. Full inspection.
Inspection method. observation inspection, inspection of construction records.
4.7.8 The curing method and curing time after concrete filling in the steel pipe shall meet the requirements of the special construction plan.
Inspection Quantity. Full inspection.
Inspection method. Check the construction records.
4.7.9 After pouring the concrete in the steel pipe, the pouring holes, jacking holes and vent holes should be blocked according to the design requirements, the surface should be smooth, and the surface should be cleaned and anti-corrosion treated.
Inspection Quantity. Full inspection.
Inspection method. observation inspection.
5 Acceptance of steel pipe concrete engineering quality
5.0.1 The quality acceptance of concrete filled steel pipe subdivision projects shall be checked and accepted according to the procedures of inspection lot, subdivision project and subdivision project.
5.0.2 The quality acceptance of inspection batches shall meet the following requirements.
1 The quality of the main control items and general items has passed the sampling inspection;
2 It has complete construction operation basis and quality inspection records.
5.0.3 Sub-project quality acceptance shall meet the following requirements.
1 The inspection batches contained in the sub-projects shall meet the requirements of qualified quality;
2 The quality acceptance records of inspection batches included in sub-projects should be complete.
5.0.4 The quality acceptance of the concrete-filled steel tube subdivision project shall meet the following requirements.
1 The quality of the sub-projects contained in the sub-divisional projects shall pass the acceptance inspection;
2 Quality control data should be complete;
3 The structural inspection and sampling test results of the CFST subdivision shall comply with the relevant regulations;
4 The acceptance of the visual quality of the steel pipe concrete subdivision project shall meet the requirements.
5.0.5 The quality acceptance records of the concrete filled steel pipe sub-divisions shall meet the following requirements.
1 The inspection batch quality acceptance records can be carried out according to the provisions of Table A.0.1~Table A.0.7 of this specification;
2 The sub-project quality acceptance records can be carried out according to Table B of this specification;
3 Subdivision project quality acceptance records can be carried out in accordance with the provisions of Table C.0.1 ~ Table C.0.4 of this specification.
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