SU1740592A1 - Adjustable block centering - Google Patents

Abstract

Use: in construction for the erection of buildings from solid concrete. SUMMARY OF THE INVENTION: The inner shields of the formwork are made in the form of a single duct, inside of which are mounted mobile support posts, passed through the upper deck of the duct and having cantilever beams at the ends, (hinged to the cantilever projections of the outer shields. 1 Cf f-ly, 1 il.

Description

The invention relates to the construction and can be used for the construction of buildings of monolithic concrete.

A permuted formwork is known, comprising shuttering boards connected in a block and flexible corner elements, a stripping mechanism.

The closest to the technical essence of the invention is a mobile formwork, which includes external formwork panels, internal boards with a upper deck, lifting and stripping mechanisms.

The disadvantage of the known solution is the considerable consumption of materials and the laboriousness of the process of demoulding due to the internal formwork of individual sections, and the assembly and movement of the formwork require significant installation and adjustment operations.

The purpose of the invention is to reduce material consumption and simplify the process of stripping.

The goal is achieved due to the fact that the inner boards of the formwork are made in the form of a one-piece box, equipped with supporting movable racks installed inside it, passed through the upper deck of the box and connected by means of cantilever beams with outer shells of the formwork, which are provided with cantilever projections hinged to cantilever beams , and the stripping mechanism is located between the ends of the cantilever beams and the cantilever projections of the outer shields. At the same time on the lower edge of the inner shield around the perimeter of the box can be fixed smoothing pads of elastic waterproof material.

The drawing shows a diagram of the block adjustable formwork.

The formwork unit contains an internal formwork 1, made in the form of a single box, and mounted inside the movable uprights 2, skipped with a slide through the holes 3 ver

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of the deck 4, and the guide bracket 5, with wiping the pillars 2 onto the base plate 6, the upper end of the pillars 2 are rigidly fixed to the cantilever beams 7, on which the outer shield 9 of the formwork and the jacketing 10 of the formwork, located between cantilever protrusion 11 of the outer shield 9 and a cantilever beam 7 rack 2.

At the bottom of the box 1 are installed rods 12, passed through the holes 13. The holes t3 are made in plastic liners 14, laid in a concrete wall 15.

The outer surface of the walls are made with a slope.

Inside the formwork unit to its walls fixed console supports 16, connected to the housing 17 of the hydraulic cylinder 18, the stem of which is mounted on the support base 6.

On the outer surfaces of all the walls of the formwork box 1, a layer 20 of moisture-consuming, renewed after each molding, putty 3-4 mm thick is applied, and on the lower edge 21 of all the walls of the box 1 a smoothing pad 22 of elastic moisture-proof material is fixed around the perimeter. In the upper deck 4, a hatch 23 is arranged with a lattice hinged opening lid 24 for lighting inside the unit and a ladder 25. To the deck 4 there are fastening loops 26.

The outer surface of the wall 19 is made with a slope of 0.04-0.06%. The indicated slope is a negative slope with a reference from the top of the block. Slope is required to evenly distribute the moisture-based putty on the surfaces of the molded walls of the building.

The slope limits of 0.04-0.06% are given directly depending on the thickness of the moisture-absorbing putty of 3-4 mm with a floor height of 2.8-3.0 m. With the indicated slope limits, the putty removed from the walls of the building when extending into the bottom the walls of the smoothing pad 22 are not placed on the cutting surface of the molded wall, are distributed in the upper part of the wall, compensating for the inclination of the wall plane to the vertical plane.

Formwork lifting and moving block works as follows.

On the outer surface of the walls 19 of the box 1, a layer 20 of moisture-intensive renewable putty is applied, 3-4 mm thick. After this, box 1, together with the shield 9, is set to the level of concreting of the first floor (floor) of the building together with adjacent blocks by a lifting mechanism

a distance equal to the thickness of the interior of the building stack. After installation of reinforcement cages (not shown) in the cavity between the duct 1 and the outer shields 9 of the formwork, the concrete mix is laid to the required mark.

The concrete mix during the laying process releases excess water, which dilutes the moisture-absorbing putty layer 20, which absorbs water from the concrete walls. After a certain exposure of the concrete walls, oil is fed into the hydraulic cylinders 18 alternately, either into the sub-piston or into the piston cavities of the hydraulic cylinders, and their pistons are brought up by 3–4 mm to the lifting-lowering mode.

In this case, the housings 17 of the hydraulic cylinders 18 transfer loads from the box 1 to the base 6, and the box 1 performs reciprocating movement by 3-4 mm, 0 relative to the concrete laid in the walls.

Due to the thinning of the layer 20 putty his resistance to shear drops sharply.

During the reciprocating movement of the inner box 1, the outer shield 9 of the formwork remains stationary, as the pillars 2 supported on the base 6 are passed through the opening 3 of the upper deck 4 and the guide bracket 5 with the possibility of 0 slip.

After curing the walls with concrete, the anchor is removed and with the help of the house of the multiple mechanism 10, the formwork shield 9 is retracted from the outer wall surface of the building, and 5 hydraulic cylinders 18 are activated for lifting the box 1.

8, the process of moving the duct 1 to a smoothing pad 22 smoothes the surface of the layer of putty remaining on the 0 concreted molded building wall.

When removing the box from the molded

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through loops 26 and rearranged to

5 new grab with case transfer 17

hydraulic cylinders 18 to its original position.

In the new grab, the layer 20 of moisture-absorbing putty remaining on box 1 is restored to a thickness of 3-4 mm with the help of a putty applicator.

The cycle of the formwork overhead unit is repeated.

Thus, the use of a box for internal formwork reduces the consumption of metal by 8-10 times, the combination of wall molding and puttying operations is achieved, which reduces the labor intensity of subsequent finishing works.

Claims (2)

The implementation of the internal formwork box solid eliminates the use of the mechanism of stripping, which simplifies its design and reduces material consumption. Claim 1. Block-mounted formwork, including formwork outer shields, upper deck internal shields, lifting and dismantling mechanisms, characterized in that, in order to reduce material consumption and simplify the stripping process, the formwork inner shields are made in the form of a single duct fitted with inside it are supporting movable racks, passed through the upper deck of the box and connected by means of cantilever beams to the outer shields of the formwork, which are provided with cantilever projections pivotally connected to the cantilever beams, and the stripping mechanism is placed between the ends of the cantilever beams and the cantilever projections of the outer shields. 2. The formwork according to claim 1, characterized in that smoothing pads of resilient waterproof material are fixed on the lower edge of the inner shields around the perimeter of the box.