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.

In order to ensure that the construction period and construction cost control meet the target requirements, special countermeasures and measures need to be formulated for the construction links such as shear wall formwork support, frame column formwork support, frame beam formwork support and roof formwork support. ① Determine the support method of the shear wall formwork support system: take a formwork and erect it by two workers. The inner and outer walls are erected together. A total of two people are required to put on the through wall screw, which is sleeved with PVC pipe to connect the inner and outer plates. Draw the secondary back ridge to the net height of the wall, take the secondary back ridge at the butt joint of the remaining space of the large board as the benchmark, place a secondary back ridge every 200mm and fix it with ordinary nails. The first main back edge is 200mm upward from the ground and fixed on the through wall screw, which is clamped with bow fasteners. The internal and external walls are carried out at the same time and fixed with nuts. The butt joint is used for the butt joint between the double pipe main back edge and the double pipe main back edge to install and fix the main back edge of the whole room. ② Determine the support method of the frame column formwork support system: erect the formwork around the column and fix it with nails. A secondary back ridge shall be placed at both ends of each side. After it is fixed with ordinary nails, the spacing shall be 300mm. The double pipe main back ridge is used, the through wall screw is used on the outside of the formwork, and the outer ends of the formwork at both ends of the main back ridge are clamped with through wall screw. Diagonal tie rod: one for each of the two adjacent surfaces. ③ Determine the support method of the beam formwork support system: clamp the 1.5m steel pipe on the support top rod of the top plate with a cross buckle to support the beam bottom formwork. The spacing between the steel pipe and the steel pipe is 1.2m, and level the steel pipe and lay the beam bottom. One main back edge is used at both ends of the formwork. After the shear wall formwork and roof formwork are fixed, the beam bottom formwork is laid. ④ Determine the support method of the roof formwork support system: after the main keel stretches the adjustable main keel of the roof formwork to the appropriate size according to the required size of the room, tighten the locking screws, and install the supporting top rod on the main keel through the butterfly lock on the bar body at a certain distance according to the requirements of the drawing. After fixing, erect the main keel.

The new building formwork support structure has the advantages of energy saving, material saving, cost saving, ensuring project quality and improving construction efficiency. It can be recycled, has high strength, and has good verticality and flatness of concrete. It has implemented the basic national policy of energy conservation and emission reduction.