Discussion on technical work after installation of alloy aluminum plate

In the construction project, after the installation of aluminum alloy plate, the elevation and verticality of the wall column should be adjusted, and the wall column formwork should be fastened at the same time, so that the whole aluminum alloy formwork system can form a whole with high strength and rigidity. Use laser leveler to adjust the elevation of wall column for the second time, and the error is controlled within 5 mm. Adjust a wall column and reinforce it in time. According to the drawings, install back stare blankly, counter-pulling screw and brace in turn, and the installation of back stare blankly, counter-pulling screw and brace shall be close together, and it shall not be too loose or too tight. If it is too loose, formwork expansion may occur when pouring concrete, and if it is too tight, it will cause local deformation of back powder, which will affect the flatness and vertical degree of wall columns in this position of each layer in the future; The back stare blankly is fixed by the opposite screw and gasket, and the diagonal brace is fixed on the floor by the expansion butterfly bolt, and the side brace can prevent the displacement of the wall column in the concrete pouring process; The last product, the reed chain, is tied to the formwork of the outer wall and the middle stairwell wall to realize the combination of top and pull, which can control the verticality and flatness of the wall column. The gourd chain is fixed on the floor with pre-treated iron rings. After each fastening test piece is installed, adjust the verticality of the wall column for the last time, and generally adjust the tightness of the diagonal brace and the opposite screw to control the verticality of the wall column within 4 mm.

After the aluminum alloy plate is assembled, the beam and slab reinforcement shall be bound and the electromechanical embedded work shall be carried out, and the concrete can be poured after it is accepted by the supervision engineer. Because the aluminum alloy plate is tightly spliced, the bubbles in the concrete are not easy to be discharged, and it is easy to form pits on the surface of the structure. In order to avoid this phenomenon, the concrete ratio is optimized to reduce the occurrence of bubbles, and the vibration is strengthened when pouring concrete to keep the bubbles in the concrete exhausted. At the same time, during the concrete pouring, two workers will be assigned to check the connection of the pin pieces and bolts and nuts around the formwork, and timely repair will be found if it falls off. At this time, the construction of the aluminum alloy formwork on one floor is completed as a whole, and the aluminum alloy formwork can be dismantled and transported to the next floor after the concrete reaches the corresponding strength.

Analysis on the advantages and key points of construction operation of alloy aluminum plate

(1) Design the layout of alloy aluminum plate according to the drawing, standardize the factory production and have high dimensional accuracy.

(2) The aluminum alloy formwork system does not need skilled workers. After the formwork is made in the factory, the workers should assemble it in advance in the processing plant to train the workers. At the same time, the skilled workers or technicians should check whether there is any room for improvement.

(3) Alloy aluminum formwork and accessories are finished products. After being transported to the site and checked with the packing list, they can be classified according to the specific construction operation requirements and transported to the construction site for construction. Store every small accessory, connector and tool properly, distribute it when it is needed, and store and register the remaining templates and accessories for future modification and replacement. There is no need for formwork yard or processing yard, but only a small warehouse, which is suitable for projects with narrow construction sites.

(4) Procedure and key points for installing alloy aluminum plate:

After each layer of concrete is poured, it is necessary to ensure the levelness of the peripheral guard plate of the flat die first, so as to maintain the lead sag of the template; Concrete leveling and leveling correction work, more than 8mm above the datum, must be polished to the correct levelness; Pay-off shall continuously pass through openings, external angles, etc. for at least 150rm, so as to control the correct position of formwork before pouring. When the wall formwork and the beam bottom formwork form a closed structure, the supporting plate girder for supporting the plate formwork is installed, followed by the plate formwork, generally starting from the corner of the wall, and the plate formwork is coated with release agent after being installed. Each template is numbered. As long as the number is right, the installation becomes modular and procedural, the installation quality is stable, and the management can be normalized.

(5) Maintenance during concreting, the alloy aluminum plate system organically integrates several self-supporting systems such as wall formwork, top formwork and support, and completes the whole formwork assembly at one time, and realizes one-time pouring. During concrete pouring, it is necessary to check whether the pin steel wedge is loose, whether the support is slipping, whether the cover plate at the opening of the window is covered and whether the concrete overflows. Because the pin and steel wedge are exposed, it is easier to observe the changes.

(6) The dismantling sequence and points for attention of formwork generally include non-bearing formwork first, bearing formwork later, side plate first and bottom plate later. Generally, the wall formwork is removed after 12 hours, and the floor slab can be removed after 36 hours, but it will be faster after calculation according to the specific conditions of the project.

Precautions for form removal: ① It is forbidden to place alloy aluminum plate face down; It is forbidden to lay the template flat unless the stacked alloy aluminum template is collected; It is forbidden to use templates as slopes, bridge decks or treads. (2) classify and reasonably pile up aluminum templates, and make clear signs, so as to facilitate the construction of the next floor as soon as possible. (3) collect small materials in time, otherwise it is easy to lose a lot. (4) removed alloy aluminum template to clean immediately, especially the floor template.

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