by 1.
General requirements 1.1 the scope of application of aluminum alloy formwork is particularly applicable to concrete structure buildings with more than 25 standard floors and external walls designed as internal insulation.
The floor height should be less than 3.3m.
1.2 scope not suitable for application of aluminum alloy formworks 1.3 the supporting external frame form is particularly suitable for cooperating with the attached lifting scaffold (i.e.
climbing frame), which can effectively reduce the structural holes, organize the interpenetration construction of each process (the construction of doors and windows, railings, putty, etc.
of the external wall from bottom to top with the main body), realize the external wall without plastering, improve the project quality, speed up the construction period and improve the image of the construction site.
When the aluminum alloy formwork is used for supporting the external scaffold of section steel cantilevered steel pipe, it is necessary to re configure the formwork at the cantilevered layer, which reduces the integrity of the aluminum alloy formwork, and the concrete forming effect is poor.
The aluminum formwork processing requires high precision of the reserved position of I-beam, which is difficult to construct and affects the construction period.
Moreover, the external wall is of full concrete wall structure, and it is not easy to set wall connecting parts, steel wire rope unloading and other measures, which will affect the structural construction, And it is not conducive to construction quality control and safety assurance.
Therefore, it is not recommended to use the external scaffold of section steel cantilevered steel pipe.
2.
The work flow of aluminum formwork implementation shall be arranged in a compact manner, and timely communicate with the construction unit, design unit and aluminum alloy formwork subcontractor.
Some work shall be inserted in advance or carried out synchronously.
The aluminum mold unit generally takes about 45 days from structural optimization to aluminum mold transportation to the site.
2.1 aluminum alloy formwork subcontracting inspection should select large-scale and experienced aluminum alloy formwork manufacturers, and aluminum alloy formwork companies that have cooperated with the construction unit of the proposed project should be given priority.
Inspect the factories and projects under construction of aluminum alloy formwork manufacturers.
Focus on the investigation of the manufacturer’s strength, aluminum material, plate forming, production process, design optimization ability, processing quality, supply capacity, actual quantity qualification rate of concrete forming and technical service, to understand its production and processing cycle, product price, recovery residual value rate, accessory supporting form, and consider the transportation distance.
2.2 joint review of construction drawings the construction unit, the design unit, the general contractor and the aluminum alloy formwork subcontractor shall jointly review the drawings and make corresponding image data and records.
The structure, architectural design and building delivery standards can not be modified or adjusted after being determined by all parties.
Once changed, the construction period and cost will be greatly affected.
2.3 drawing optimization project department shall cooperate with the design department of aluminum alloy formwork subcontractor to optimize the original construction drawing.
Conduct in-depth docking with the door and window unit, railing unit and water and electricity installation unit to ensure that each detail can be properly docked, and timely confirm with the construction unit, design unit and supervision unit.
2.4 the contract shall be signed in accordance with the company’s aluminum alloy template subcontract model, supplemented with corresponding special terms, and the contract shall be signed in time and the advance payment shall be paid.
2.4.1 special terms requiring contract interpretation 1) scope of contract; 2) construction period; 3) specify the model of aluminum alloy, the date when the aluminum alloy formwork enters the construction site and the product quality; 4) define the delivery time, detailed design and production cycle of drawing joint review; 5) define the support and reinforcement system in the quotation; 6) define the scope, quantity, specification and model of auxiliary materials, such as the quantity of release agent, embedded parts and split screw sleeve; 7) commitment to reuse times; Provide professional guidance of the manufacturer and disclosure and training of workers; 8) modification cost of aluminum formwork after change; Recovery and treatment of aluminum alloy formwork after use; 9) payment proportion of phased funds; 10) Quality standard and acceptance of raw materials; 11) Pre assembly quality standard and acceptance; 12) Site installation quality standards and acceptance; 13) The quality standard of the finished concrete shall be indicated to ensure the acceptance of the coating unit; 14) Scope and duration of warranty for aluminum alloy formwork; 15) Definition of auxiliary labor such as mortar plugging, hole plugging, wrong platform repair, surveying and setting out, etc.
2.5 mold matching design and review: the aluminum alloy formwork subcontractor shall be responsible for professional design and reasonable mold matching.
The chief engineer of the project shall track the design content and design progress in time, and organize joint review.
The chief engineer of the branch shall be responsible for approval.
2.6 the formwork processing and manufacturing project department shall arrange professional personnel to track, and timely feed back the surface treatment form (electrostatic powder spraying), production quality, progress and trial assembly effect to the project department and the construction and supervision units.
2.7 trial assembly and acceptance: the aluminum mold unit shall conduct trial assembly of the aluminum mold in the factory according to the ratio of 1:1.
Except for partial distribution nails, other components (diagonal braces and embedded parts, vertical back ribs, upright rods, transfer ports, and split screws) shall be assembled in full accordance with the site implementation requirements.
Attached with the inspection and acceptance form, the project department shall organize the relevant personnel of the construction unit, the supervision unit, the design unit, the technical center of the group company, the engineering management center and the branch company to conduct acceptance on the site.
The aluminum mold unit shall timely rectify and adjust according to the acceptance opinions.
After the re inspection is qualified, all parties shall sign for confirmation and retain the relevant acceptance image data.
2.8 the aluminum mold unit that transports to the site shall number the aluminum molds that pass the trial assembly acceptance, pack them according to the on-site installation sequence, timely transport them to the project department in combination with the project schedule and deployment, and organize the acceptance of materials according to the list.
The general contractor shall reasonably plan the stacking site to avoid material loss.
The project department shall plan the access route and formwork stacking site in advance.
The stacking height of materials on the site shall not exceed two layers, and square timber shall be set at the bottom.
The project department shall provide a warehouse for auxiliary materials and accessories to prevent material loss.
3.
Structural optimization 3.1 in order to meet the requirement of no plastering, the external wall structure shall be designed as a full cast-in-situ concrete wall to avoid masonry.
(cooperate with the climbing frame to realize the reverse construction of external wall) 3.2 the walls of elevator shaft and staircase should be designed as full shear wall structure..
