Summary of aluminum alloy formwork system
The traditional construction industry is transforming towards the direction of "environmental protection and speed". By promoting the construction of aluminum alloy formwork, the construction environment can be improved, the process quality and environmental protection can be improved. The implementation of aluminum alloy formwork construction requires stable design drawings, which also promotes the standardization process of products in reverse.
Aluminum formwork is an aluminum alloy formwork system, which consists of a panel system, a support system, a fastening system and an accessory system. The panel system is made of extruded aluminum alloy profiles, replacing the traditional wooden formwork, with high-strength steel support and fastening system and hardware latches and other accessories. It has the characteristics of light weight, high strength, overall stability, convenient assembly and disassembly, and repeated use. The aluminum formwork panel system can meet the needs of building various building components through lofting design. In the lofting design, the method of "80% standard parts + 20% non-standard parts" is usually used to achieve flexible combination and improve the turnover rate.
一. Advantages of aluminum formwork:
1. The construction environment of aluminum alloy formwork is clean and tidy, which can enhance the humanistic care for workers. There is less waste after construction, and the formwork materials are renewable, which conforms to the concept of green environmental protection and can bring good social benefits.
2. The early demolding support system is adopted. Through the combination of a panel system + three support systems, the construction progress of one floor can be achieved in 4 days. For a 33-story building, it can save about one month of construction time compared with traditional wooden formwork construction.
3. The aluminum alloy formwork is quick to install and disassemble, which can effectively shorten the construction period. The installation and disassembly operation is simple, and the technical requirements for workers are not high, which can solve the problem of shortage of technical workers on site.
4. The aluminum alloy formwork has high strength and good stability. The concrete surface is flat and precise after demolding, which can avoid surface cleaning and save costs.
5. Small-sized secondary components such as staircase structural columns, door and window lintels, water stop reverse edges, and caisson reverse sills can be formed at one time with good results, which can effectively solve the leakage problems of exterior walls, doors and windows, and toilets.
6. Due to the improvement of the quality and precision of concrete engineering, the exterior wall door and window engineering can save the time of on-site re-measurement and directly arrange production and installation according to the design drawings. After the exterior doors and windows are installed in advance, a place is provided for interior decoration, so that the "civil construction-door and window installation-interior decoration" can be overlapped and constructed simultaneously in the building, greatly shortening the delivery time.
7. Compared with traditional wooden formwork, aluminum alloy formwork has advantages in economic factors such as construction efficiency, construction cycle, maintenance cost, personnel requirements, machinery requirements and number of reuses. In addition, through residual value recovery and increased turnover times, the overall cost of aluminum formwork can be equal to or even lower than that of traditional wooden formwork system, bringing better economic benefits. For high-rise residential buildings with a height of about 33 floors, the cost of using aluminum alloy formwork is lower than that of traditional wooden formwork; if it can be replicated between buildings, the comprehensive economic benefits of aluminum alloy formwork will be more obvious.
二, Aluminum formwork deepening
Similar to the in-depth design of steel structure, aluminum alloy formwork needs to have a in-depth formwork design process according to the construction drawings. From in-depth design, production scheduling to on-site trial assembly, the cycle is about 2 months. In order to make the concrete components formed in one time and reduce the large amount of water and electricity hole and groove work in the later stage, the aluminum alloy formwork needs to provide a complete set of civil engineering, water and electricity, and fine decoration construction drawings for formwork layout design, reserved hole and pipeline positioning, and door and window openings, anti-sill and other detailed large-scale layout design. If there is complete construction data, the formwork design process is equivalent to an in-depth review process, which can find the "errors, omissions, collisions and deficiencies" of various professional design drawings early, avoid rework, and save construction time. After the aluminum alloy formwork is scheduled and assembled and debugged on site, design changes are not allowed, otherwise it will affect the construction efficiency and cause material waste.
First, the key design requirements for aluminum alloy formwork construction are not the unification of products, but the unification of design standards and the specification of design management processes, and design pre-positioning is required. If the product positioning is not determined in advance, the early design time will be compressed and the drawings cannot be produced in advance. In the later stage, there will be more design changes, and a large number of aluminum formwork construction cannot be realized. Therefore, to implement aluminum formwork construction, first of all, all departments need to unify their thinking, form a stable development and design idea, and do not engage in "three-side projects".
Second, the implementation of aluminum alloy formwork brings many benefits to the fine decoration delivery, but because its water and electricity pre-buried position cannot be changed in the future, before the aluminum formwork matching design begins at the stage of building design completion, the water and electricity pre-buried reserved points required by the indoor fine decoration design must be determined. This requires the decoration design drawings to intervene as early as possible and complete the design in advance.
Third, to complete the design faster, realize the design pre-position and design stability, promoting product design standardization is undoubtedly an effective way. Through standardization, rapid design and rapid replication can be achieved, which can greatly shorten the design cycle and achieve a stable set of upper civil engineering, equipment, and decoration construction drawings before the basement construction is completed. Create the necessary conditions for aluminum formwork construction.
In summary, aluminum alloy formwork construction is environmentally friendly, has a high turnover rate, and has a high residual value. It has a great cost advantage for high-rise residential buildings with a large number of standard floors. At the same time, aluminum alloy formwork construction can achieve the entry of decoration projects before the structure is capped, shorten the delivery time, and bring good time economic benefits. Through the advancement of construction technology, the advancement of design standardization can be promoted.