SU1350297A1 - Forms for erecting solid ferroconcrete floors - Google Patents

Abstract

The invention relates to the construction and can be used in the construction of flat ribbed or coffered reinforced concrete floors with supporting structures in the form of metal beams used as rigid reinforcement. The purpose of the invention is the reduction of labor costs for analytical works. The formwork is made with a device for mounting and dismounting in the form of a horizontal plate 18 with vertical ribs 19 with holes 20 and an inclined slot 21 and a support plate located between the vertical edges with which it is connected with bolts 27. 2 3, p. f-ly, 12 ill. i (Л years ОО СП о о со vr 13 f Iff 5 3 Риг.

Description

The invention relates to construction and can be used in the construction of flat ribbed or coffered floors.

The purpose of the invention is to reduce the material and labor costs of formwork,

FIG. 1 shows a ribbed formwork with metal beams as rigid reinforcement; 2 - the same, without rigid reinforcement; in FIG. 3, a flat slab formwork with non-metallic metal beam1 and; in fig. 4 and 5 - section A-A, respectively, in FIG. 1 and 2; on .fig. 6 is a section bb of FIG. 3; in fig. 7 - section on fig. 1; Fig, 8-section G-Gnafig.Z; in FIG. 9, node I in FIG. 3; in fig. 10 a section dd in fig. 9; in fig. 11 - cross section along a bent-backed section of flat slab in the initial stage of dismantling the shuttering bar; Fig. 12 - cross section on a bent-finished section of flat slab in the final stage of dismantling the shuttering board.

Ribbed slab formwork includes extreme 1 and middle 2 formwork boards containing vertical 3 and horizontal 4 formwork planes attached to the top 5 and bottom 6 frames of the spatial rigid frame 7 formwork board

The flat slab formwork consists of shuttering boards 8 made in the form of a rigid frame .9 and a shuttering plane 10 fixed to it 10. The outer vertical face of the 9 frames of these shutters are secured by the clamps 11 of the working position of the deck elements 12, which are mounted around the entire formwork perimeter cells and gaps between shields. The clamps 11 of the working position of the stripping elements 12 in the formwork of ribbed floors are rigidly fixed to the spatially rigid frame 7 of both the extreme 1 and medium-2 formwork boards around the perimeter of the mounting joints between the boards "

The lower frames 6 of the spatially rigid frames 7 of the formwork panels 1 and 2, with ribbed overlap, are made with holes 13, into which pallets 14 are inserted to form the formwork of the bottom of the beams, palms 14, pressing against the formwork board 15 of the bottom of the ball0

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ki The same holes serve for bolting the shuttering boards 1 and 2 into one shuttering plane of the shuttering cell, which is done by installing the bolts 16 into the opposite openings of the frame beams of the adjacent shuttering boards. In the same way, the individual formwork boards are joined into one formwork cell plane with a flat floor.

Each shield is equipped with four detachable overhead assembly and disassembly devices 17, each of which consists of a horizontal plate 18, two vertical ribs 19 attached to it with a hole 20 and an inclined slot 21 in each edge, united in a rigid mounting ring. loop 22, having a groove 30 on the outer surface fixed between the ribs 19, as well as the eccentric support plate 23 with two openings 24, the support pad 25 and the mounting loop 26 installed in the jur between the ribs 19. Eccentric support pl Steen 2E is pivotally secured to the ribs 19 by bolts 27, of rehydrating the hole 20 and the slot 21, the ribs 19, - combined with the apertures 24 of the support plate 23.

With mounted formwork, each pair of adjacent mounting and dismantling devices 17 located on the same support is fenced off by a sleeve 28 with a conical outer surface and mounting loops 29.

The formwork works as follows.

Before mounting the formwork panel into working position, the eccentric support plates 23 of detachable overhead assembly and disassembly devices 17 are transferred to the uppermost position by turning around the bolt 27 installed into the hole 24 of the support plate; - the tires 23 combined with inclined slots 21 in the fins 19 Then, using a crane or other lifting mechanism, for the mounting hinges 22, the formwork panel serves to a mark slightly higher than the mark of the bottom of the concreted slab. In this state of the shield, the eccentric support plates 23 are turned around. nesemnph previously installed bolts 27 are in the translation work horizontal polozheniej

which is fixed by installing in each mounting and demounting device 17 removable bolts 27 into holes 24 in eccentric support plates 23 aligned with holes 20 in vertical ribs 1. After that, the formwork panel is lowered onto the supporting structures (beams, walls or pillars).

Thus, the installation of the whole set of formwork panels is carried out. Then, the installation joints 11, which rest on clamps 12, are placed in the installation seams between the boards when placing the formwork of ribbed or caisson slabs, as well as along the perimeter of the formwork cell. When making the formwork of flat slabs, lay the shuttering elements 11. plane by installing in: holes 13 in the frames of adjacent bolt shields 16. Then, the bottom forms of the beams are made by installing the formwork shields 15 on the fingers 14, which are inserted GZ holes in the frames of shields adjacent in the formwork cells. For each pair of adjacent assembly and disassembly devices 17, a sleeve 28 is worn.

Stripping begins by removing the fastening bolts 16, dismantling the formwork of one formwork cell into separate shields, and dismounting fingers 14 and formwork shields 15 bottoms of ribbed floors. When dismantling the flat slab, only bolts 16 are removed.

The removal of the formwork is carried out from the surface of the pre-formed overlap plate as follows.

The formwork panel is attached to the mounting loops 22, so that the lines are not in the tensioned position. The bolts 27 are then dismantled from the holes 20 in the ribs 19 aligned with the holes 24 in the eccentric support plates 23. Thereafter, the eccentric support plates 23 that are opposed in the formwork board are slinged by mounting loops 26, flexible sling slips are placed in the grooves of the 30 mounting loops 22. Forced demolishing of the formwork panel

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when making screw fasteners in which the eccentric support plates 23 rotate towards the center of the panel around bolts 27 installed in the slot 21 of the fins 19 and aligned with the holes 24 in the support plates 23, the bolts 27 slide up through the slot 21, The eccentric ends of the support plates 23 abut against the support plates 18 and, through them, act on the shuttering boards, tear them away from the concrete. This operation can be carried out directly with a crane in case there is sufficient stock of carrying capacity. In this case, the formwork panel is immediately behind the assembly loops 26 of the eccentric support plates 23. After the forced formwork, the end of which is fixed by the upper position of the eccentric support plates 23, the formwork panel is lowered onto the trolley to roll along the underlying overlap to a new planned position when concreting the floor for several steps or to move along the height of the building for concreting the next floor. The sleeves 28, due to the conical outer surface, are pulled out of the concrete by the mounting loops 29, and the holes in the slab formed by them are sealed with concrete.

The presence in the formwork of removable overhead assembly and disassembly devices allows to unify the fastening device for various sizes of formwork boards and formwork cells, and the simplicity of the design solution of the formwork support unit and the possibility of its forced formwork significantly reduce the labor costs of formwork works. The presence of the stripping elements in the joints between adjacent shuttering boards or between the boards and previously made beams ensures the fixation of the horizontal position of the boards during concreting and the possibility of free movement of the shuttering boards down during the stripping and, as a result, reduction of labor costs for the shuttering works.

F, formula of invention

Claims (3)

1. Formwork for the construction of monolithic reinforced concrete floors. containing formwork boards, devices for mounting and dismounting and decking elements, characterized in that, in order to reduce material and labor costs for formwork work, each device for installation and dismantling consists of a horizontal plate with vertical ribs having a hole and an inclination slit, a support plate with holes, fixing pins and loops, the base plate being made with an eccentric, located between the vertical ribs, connected to them by the fixing pins, and mounted and with the ability to move along the inclined slot of the vertical edges to the interaction with stripping with a horizontal plate. ; 2. The formwork according to claim 1, characterized in that the loop for mounting and dismounting the formwork is fixed between the vertical edges and has a groove on the outer surface, and an opening is formed in the support plate to detach the formwork from the concrete during the stripping. 3. The formboard according to claim 1, characterized in that each shield is provided with retainers fixed at its ends, and the stripping elements are located between adjacent boards and come into contact with their ends and retainers. balko Fig. J 3 V 15 7 (Pu.5 Rack 10 9 1827 FIG. 6 iO Ill n 6-5 12  l is 3 7 16 12 13 FIG. 7 . 9 Ultrasound w Pu2.e 16 19 21 2t 27 . K o 18 21 27 2it 12 2S 25 (Pus.9 thirty  r f 27 27 7f-l 26 Fi.y.Y. l: uh e & si 3 OSostBITel V „Rudoy Editor G. Volkov Tekhred L. Serdyukova Corrector L. Patay Order 5236/30 Circulation 667 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35e. Raushsk nab., D, 4/5 Production and printing company, Uzhgorod, st. Project, 4