Talking about the all-glass curtain wall construction quality control

Talking about the all-glass curtain wall construction quality control Talking about the all-glass curtain wall construction quality control Abstract: The engineering characteristics of the glass curtain wall, we are strengthening the glass curtain wall project including design, materials, construction, engineering, full acceptance of the following four aspects of quality control analysis of the issue discussed on this basis, the current work on a number of recommendations. Glass curtain wall will protect the wind outside the building, Zhe Yu, lighting, thermal insulation and other wall decoration and building use function combined to form a melt building technologies, architectural art as one of the building perimeter retaining structure has been in our senior and widely used in high-rise building. However, glass curtain wall structure of the 1 special nature of the material in many kinds of high technical requirements, which requires both the correct design and calculation, standard process, but also have matching high-quality processing equipment and the construction team, and therefore the glass curtain wall the whole process of quality control engineering point of control is more important, this article briefly describes the full range of glass curtain wall construction quality control in a few key points. First, the design quality control Curtain Wall Design to give the production, installation, supervision and other aspects of officers without any explanation to fully understand the case, therefore, drawings should be complete, detailed, expression should be standardized. Glass curtain wall construction is now usually done by construction enterprises on their own designs, drawings without the original structure design unit audit, although some approved, only from the overall plan, elevation effect rough look at the trial, did not play a technical audit and 2 checking. Therefore, the design drawings were highly irregular and insufficient depth of common design drawings, design drawings incomplete phenomenon: the non-construction drawing instructions and construction requirements, the lack of nodes bulk sample map, the lack of embedded parts, anchoring the node basis, the curtain wall frame in vertical load keel , horizontal loads of stress and deformation calculation; lightning, fire prevention, drainage, inappropriate measures designed to determine the wall did not pass their own lightning protection grounding system set distribution pinout of the material and cross-section size and the main structure of lightning protection system, a reliable connection, and In the design, large sample map clearly marked, while the direct use of curtain wall with the main structure of the connection to connect to ground lightning body; design embedded items are not marked location, ignoring three-dimensional adjustment processing. In addition, some projects have lagged behind the main glass curtain wall designed to progress, the structure is not based embedded parts, so that the glass curtain wall and the main structure of the connection, inappropriate measures affecting a reliable connection. Also some of the works the outer edge of the floor 3 under the window there is no physical wall, but did not set the crash required railings, all of which have glass walls left varying degrees of quality and safety hazard. 2, material quality control Wall with the profile should be consistent with current national standard “aluminum alloy extruded profiles for architecture” GB/T5237 provided for high-precision-level requirements, anodic oxide film thickness should not be below the “anodized aluminum and aluminum alloy anodic oxide film of the general norm” GB8013 set forth in AA15-level, structural parts profile thickness of not less than 3mm. Structural adhesive must have good tensile strength, peel strength, tear strength and elastic modulus, it also played the role of shock absorbers. Structural silicone sealants and silicone sealant weathering material supply must be provided by the product quality assurance limited to the quality of proof of age and structural silicone sealant and contact materials 4 compatibility and adhesion test reports, and should pay attention to the same batches of rubber quality and stability of the structure shall not use more than the period of structural silicone adhesive, sealant and structural adhesive can not substitute each other, especially as the weather may not be structural adhesive glue used; hardware should meet the design requirements may not be used easily rust stainless steel materials, welding of stainless steel to take shelter when the response measures to prevent the welding sparks splashed on stainless steel caused by rust; strictly in accordance with regulatory requirements, fire-resistant rating of A or B1 of the material, when the fire rating of materials is not clear, it should be tested samples . Third, the construction quality control Glass curtain wall project construction quality control mainly in two aspects: First, embedded connectors making installation; second is the production and installation of construction components. Concrete can be controlled from 5 the following aspects: (1) curtain wall with the main connection, when there are no conditions for use of embedded parts, connections, connections with other reliable measures, but must pass the node strength test to determine their carrying capacity and bearing capacity of the pilot project by the design decisions. Embedded parts, connectors must be installed firmly, the location is correct, weld quality, in line with “Building steel welding procedures” JGJ81-91 requirements, and by the anti-corrosion treatment. (2) curtain wall joints should be three-dimensional adjustable cushion, adjustable range of each, 40mm, and has anti-loosening measures to force the rivet and bolt not less than 2 per Division. 6 (3) The structure plus curtain wall column should be used to connect large tube form, column stretching from pillar to connect core pipe column at each end of the cavity height is not less than two times the column and core tubes should be movable with the upper and lower gap width of the column should not be less than 10mm, and apply the sealant seal. (4) column and beam ends of a connection should be an additional application of flexible rubber gasket and sealant filling tight. Reposted elsewhere in the paper for free download (5) glass shall not be in direct contact with the elements, glass groove at the end of four weeks and structures should maintain a certain gap, the lower part of each piece of glass 7 should be located not less than two flexible positioning pads, pads of width and notch width should be the same for every block length of not less than 100mm. Glass and components of the gap should be filled using the elastic material may not be filled with the gas hard materials. (6) glass surrounded by a solid non-slip rubber inlay, four corners to be diagonal disconnect, disconnect Department and the middle of application of adhesive bonded firmly. (7) The hidden frame, semi-hidden frame curtain wall structure of plastic injection to fight against on-site. (8) structural adhesive, sealant injection should be uniformly flat playing straight, tight and firmly bonded, no bubbles, sealants shall not be bonded on three sides. Structural adhesive thickness and width of the junction determined 8 according to design calculations at the same time, the structure should not be less than the thickness of adhesive junction 6mm, and should not be larger than 12mm, the width of not less than bonded 7mm; construction sealant should be greater than the thickness of 3.5mm, the width of not less than 2 times the thickness of the construction. (9) Full glass curtain wall of glass and glass, glass and glass, the gap between the rib structure of silicone sealant should be used to fill embedded tight slit width of not less than 6mm. 4, engineering, quality control and acceptance 5 Conclusion and recommendations The glass curtain wall construction quality control should select qualified and strong construction with a capacity of 9 professional construction team began to strictly audit the glass curtain wall design of the project, for materials, components manufacture and installation to set the appropriate quality control point, the construction process is strictly Click the “glass curtain wall engineering and technical norms” JGJ102-96 and other technical standards for control, elimination of quality and safety problems, to ensure the structural safety of the glass curtain wall and an important use function. Reposted elsewhere in the paper for free download 10