1. The formwork support system is divided into constructive steel pipe support system. The construction of this system is not particularly environmental friendly and inflexible. At the same time, the loss degree is very large. The main reason is that this system is not particularly safe and the stability performance is relatively poor.

2. In addition, there are bowl button steel pipe support system, portal frame steel pipe support system, disc button steel pipe support system, socket keyway steel pipe support system, ordinary independent rigid support system and so on.

3. New formwork support system

The new formwork support system lays the formwork according to the design scheme (when laying the formwork from one side to the other, or from the middle to both sides, the elevation of the column head plate shall be leveled with the laying. Never adjust the elevation after the formwork is laid, and there shall be no gap between the column head plate and the top plate);

With the continuous development of social economy, science and technology, there are more and more exquisite and beautiful buildings, the structural forms of buildings are more and more complex, and the corresponding forms of formwork support are more and more. However, in recent years, support frame accidents have occurred frequently, causing huge losses to the state and individuals. Formwork support system is produced and developed with the requirements of building construction. It is an essential technical means and equipment in construction operation. The optimization of cast-in-situ concrete formwork support system is a key content in current construction engineering.

Building construction is an industry that consumes a lot of resources. In addition to the consumption of physical structural materials, the consumption of non physical turnover materials is also amazing, especially in wood square, multilayer board, frame rod and other materials for structural construction. At present, the mainstream formwork and support system of cast-in-situ frame shear wall structure adopts bamboo formwork, square timber and fastener scaffold support system. The structural construction of a large and medium-sized project usually consumes thousands of cubic meters of wood, and piles of wood are the most common on the construction site; Basically, the "fastener scaffold", which dominates the structural construction support system, has large steel consumption per unit area, many erection workers and poor working conditions on the working surface, which is not conducive to inspection and acceptance after erection. In the current environment with many construction enterprises but few engineering projects, with the increase of labor cost, the development of the construction industry must adopt advanced construction technology and materials to improve efficiency, so as to reduce labor input and material loss and adapt to the highly competitive market environment. At the same time, the State advocates energy conservation and consumption reduction and green construction. Wood resources are becoming increasingly scarce. Alternative products will become the inevitable trend of cast-in-situ concrete construction in the future. Through the research, discussion and innovative practice of formwork support system, a new support system is applied to make it safe and reliable, easy to operate, shorten the construction period and reduce the construction cost.

Advantages and disadvantages of the scheme to solve the above problems: in scheme I, the wooden square is embedded in the formwork support system of I-shaped steel wood composite beam, which is convenient for nailing when the formwork is erected. The steel plate of peripheral I-shaped beam effectively protects the embedded wooden square and greatly reduces the loss of wooden square. The stress of the I-shaped beam is greatly improved, the spacing between the main and secondary beams of the roof formwork is greatly increased, which saves a lot of materials of the main and secondary beams, has strong applicability and high turnover times, Reduced cost input. In scheme 2, the square steel keel formwork support system has high bearing capacity, large stiffness and small deformation, greatly improves the bearing capacity, greatly increases the spacing between the main and secondary beams of the roof formwork, greatly saves the materials of the main and secondary beams, has high turnover and use times, and reduces the one-time amortization cost. Scheme III component formwork support system the formwork has standardized and modular components, complete accessories, strong applicability, simple and convenient operation, avoids the phenomenon of "formwork running and formwork expansion", and improves the appearance quality of concrete. All products are assembled with small components, with light weight and easy handling. The number of turnover use is high, which reduces the one-time amortization fee. For the above three schemes, on the basis of qualitative demonstration, further comprehensive evaluation is carried out from four aspects: operability, economic rationality, construction period and safety. The final scheme III is recognized by the construction contractor.