Formwork clamp replacing formwork-penetrating split bolts and construction clamps for reinforcement

Abstract

The invention discloses a formwork clamp replacing formwork-penetrating split bolts and construction clamps for reinforcement. The formwork clamp comprises a cast-in-place beam casting space formed bybeam side formworks, a beam bottom formwork and plate bottom formworks, a plurality of pairs of side formwork main keels are mounted on each beam side formwork, the two side formwork main keels in each pair are connected through an M12 full-thread screw rod, the upper part of each side formwork main keel is connected with an adjustable lead screw through an M16 bolt, each adjustable lead screw comprises a lead screw body and an adjusting nut matched with the lead screw body, steel pipe supporting rods are arranged on the positions, at the lower ends of the adjusting nuts, of the outer sides of the lead screw bodies and comprise seamless steel pipes, through screw holes are formed in the upper parts of the seamless steel pipes, and M8 nuts are welded to the positions, at the through screwholes, of the two sides of the seamless steel pipes correspondingly. The construction safety, quality and working efficiency of a cast-in-place structure are ensured fundamentally, the construction procedure is simplified, the construction cost is lowered, and the construction progress is accelerated.

Description

technical field [0001] The invention relates to the technical field of installation and construction of cast-in-place beam formwork, and in particular relates to a formwork fixture that replaces formwork-through tension bolts and step-by-step reinforcement. Background technique [0002] In the current conventional cast-in-place frame and frame-shear wall structure systems, the production and installation of formwork engineering occupies a very large proportion in building construction, and an average of 4 to 5m2 formwork is required for each cubic concrete component. The resources consumed by the formwork project, in the general beam, frame and slab wall structure, the cost accounts for about 30% of the total cost of the concrete structure project, and the labor input accounts for 28-45%. important. At the same time, the concrete structure is directly in contact with the formwork and is shaped by the formwork system. The quality of the formwork system and installation direc...

AI Technical Summary

Problems solved by technology

[0005] 1. The use of pull bolts must drill bolt holes on the beam side formwork every time the formwork is installed. Repeated drilling not only increases the labor cost, but also destroys the integrity and tightness of the panel, resulting in grout leakage during concrete pouring. Affects the look and feel effect of the component after forming, and at the same time leads to low turnover times of the side formwork and high material loss rate; and the sawdust residue generated by the formwork drilling is not easy to clean inside the formwork, forming structural defects and directly affecting the quality of the concrete component

[0006] 2. The pull screw is buried inside the concrete and cannot be taken out. The material consumption for one-time use is huge, and the formwork removal process is very difficult, and the formwork is easily damaged, resulting in waste of materials. If the pull bolt needs to be used for turnover, a PVC sleeve must be added in the beam However, after taking out the pull screw, a through hole is formed in the component. The inner wall of the PVC casing is smooth and has poor adhesion to the concrete.

[0007] 3. For the basement and outdoor cast-in-place beam formwork, water-stop type pull bolts must be used, and the screw is a one-time investment, which increases the amount of materials

[0008] 4. Using step-by-step tightening to reinforce the formwork is likely to cause insufficient reinforcement and cause mold expansion and grout leakage. It is basically feasible for beams with small cross-sectional dimensions, but for beams with a cross-sectional height of 700mm or more, it cannot ensure sufficient concrete lateral pressure. It is difficult to effectively guarantee the structural safety and reinforcement quality, and it is not easy to find problems when they occur

[0009] 5. The step-by-step tightening only clamps the lower-level keel of the beam side formwork, and the reinforcement area and range are small, and because the step-by-step tightening at the bottom of the beam is suspended below, there is a lack of effective knot fixing measures. During the concrete vibration process The generated vibration is likely to cause step-by-step tightening and loosening failure, resulting in quality accidents caused by the expansion of the bottom of the side mold

[0010] 6. The main keel of the side formwork generally adopts double ￠48*3.5mm steel pipes or 50*100mm square wood. Short steel pipes are usually leased, which requires a large amount of on-site use and high rental costs; the square wood is easy to lose after sawing short, and the loss rate is high , and cannot be used for other components, resulting in material waste

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