What Is Steel Formwork?

Steel formwork is a steel formwork used for concrete casting. In addition to steel formwork, there are also wood formwork and plywood formwork. Steel formwork has been widely used in construction projects due to its many uses, beautiful appearance of concrete casting and so on.

Steel formwork can be replaced
According to the use of steel formwork, it can be divided into: civil construction (house construction) steel formwork,
Advantages of steel formwork: reinforced system, high component strength, large combined stiffness, high plate manufacturing accuracy, tight seams, not easy to deform, good formwork integrity and strong seismic resistance.
Disadvantages of steel formwork: the formwork is heavy, mobile installation requires lifting machinery, and the cost is high. Introduction to the construction technology of construction project formwork, clean water formwork and early removal formwork system.

Steel formworker requirements

1. The operators of each station during the processing of the steel formwork must be processed according to the steel plate processing technology and the material model specifications and size requirements of the construction drawings.
2. In the processing process, the processing of the next process should be stopped immediately for the parts that are unclear in the construction. The technical staff at the work site must be clarified in time before the next process can be performed.
3. Welding of important and critical parts, processes, stations, and the stressed parts of the steel formwork during the processing of the steel formwork must be held to the individual. For the processes and parts that often have quality problems, necessary precautions must be taken during the processing to prevent Unnecessary quality rework occurs.
4. During the processing of the steel formwork, the operators at each station should pay attention to the accidental damage of the construction personnel, processing equipment and processed semi-finished products and accessories, and take precautions beforehand. [1]

Steel Formwork Acceptance Reference Standard

1. The acceptance of the steel formwork is based on the "Technical Specifications for Highway Bridge Construction" JTJ041-2000 formwork, brackets and arches 9.1 "Quality Inspection and Evaluation Standards for Highway Engineering" JTJ071-2005, and refers to the processing and manufacturing technical requirements provided by the client as inspection standards Combine and group the finished steel formwork for the finished steel formwork, and inspect the sections in turn.
2. The technology, procedures and the entire process of the steel template processing process must strictly follow the national technical standards (combined steel template technical specifications) GB50214-2001 corresponding technical standards.
3, in accordance with the technical details of Party A, strictly in accordance with the requirements of processing, the quality standards for processing control regardless of the combination of standards must use a higher standard for processing standards, unauthorized reduction of processing quality control standards is strictly prohibited.

Process control of steel formwork

1. The steel used for the processing of the steel template must meet the specifications of the steel used in the steel template construction drawing, and the steel material must meet the national standard ordinary carbon steel Q235a.
2. The material used for the steel mold panel must have a flat surface with a smooth surface without damage and deformation, and the thickness of the entire panel must be within the national standard range.
3. It is strictly forbidden to use plate surface rusting (pits and pits), pitted surface or secondary board with rubbing plate corners and edges (shearing board torn edges) for the working panel parts of the sheet used for steel template processing.
4. The angled channel steel and other sections of the combined rib plate must be straight and without deformation (deformed bend). The ribs at the main stress must be selected from the whole material. For the parts with irregular corners and arcs that cannot be used, the material must be strictly operated .
5. The steel mold should be reserved for welding shrinkage when discharging and unloading the part with a large amount of welding. The assembly and processing of the steel template assembly should be processed according to the given dimensions of the drawing. The coordinate position of the center hole is accurate. The combination accuracy of the steel template and the interchangeability of the assembly process must be guaranteed.

Steel template combination welding

1. Mold fan production; construction must be performed on a certain rigid tire mold. Grouped welding of shaped ribs-correction of ribs-tack welding of skeleton assembly-welding of panels to panels and welding.
2. The steel template must be constructed on the tire mold. For bolt holes for assembly, the bolts should be tightened in advance to prevent misalignment of the dimensions of the bolt holes or other adjacent parts during assembly.
3, steel template rib skeleton mesh reinforcement welding can be welded under the tire mold, the rib skeleton mesh reinforcement welding must be corrected before the tire mold combined steel mold panel.
4. The upper tire of the steel mold panel must be straightened and trimmed, the ribs of the combined ribs are fixed in position, and the edges of the panel and the ribs are welded smoothly. The steel mold frame mesh is welded to the panel assembly with ribs and panels using symmetrically spaced welding.

Application scope of steel formwork

1. The various types of steels required for the processing and production of molds; the appearance quality and the material of the steels must comply with the national standard of genuine steels, and the carbon content of the steels should be strictly controlled if necessary.
2. For the processing of the panel corners during the processing of the steel template, it is preferred to use the bending machine to bend. When there is no requirement for the corner radius, the bending radius shall be 1.5 times the thickness of the steel plate. [2]

Steel formwork structure

1. Steel formwork combination; the combined height of each section is 1200mm, the semi-circular edge of the side of the pier body is combined with the standard block, and the tray and the pier cap are disassembled and combined. Height) 86mm.
2. The preparation of ribs for steel template processing; the ribs with special-shaped corners and faces must be welded on the card mold and must be shaped repeatedly. It is strictly prohibited to make by hand.
3. The combined frame of the steel template processing is processed into the shape of a daughter-in-law button.
4. Standard combined sections of steel formwork; 8 pairs of bolt holes are reserved for each segment during the machining process; / 5, the total length of each weld at the joint of the steel plate internal rib cross combination weld is 70% of the rib width. [3]

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