SU998693A1 - Form for erecting monolithic ferroconcrete structure - Google Patents

Description

The invention relates to construction and can be used for the construction of walls and strip-foundation of monolithic reinforced concrete.

A known form for erecting monolithic concrete linear structures is a type of strip footings, including side shields and connecting elements, one of which is. lateral shields rigidly mounted transverse beam with offset from the longitudinal axis of the formwork in the direction of the opposite locking shield earring connected to the shield through a system of levers 1}.

The disadvantage of this formwork is the difficulty of dismantling due to the small forces of separation of the shields created by a system of levers.

A formwork for erecting monolithic concrete structures such as strip foundations, building walls, etc., is also known, which includes side panels and connecting elements connected to the lifting mechanism in the form of U-shaped frames with boards mounted on them 2.

However, this opaluezka does not provide an effective detachment of the shields during its dismantling, and the labor intensity

The separation of the shields is quite high, since it is done largely by hand, and the use of other known methods of demolding is difficult.

The aim of the invention is to reduce labor costs in formwork.

The goal is achieved by

10 that the formwork for erecting a monolithic reinforced concrete structure, including shields and connecting elements in the form of U-shaped frames, is equipped with T-shaped beams fixed to the boards with shelves and edges of variable height and stops mounted on the U-shaped frames, and the shelves of the beams placed between the stops with the possibility of movement.

20

Fig, 1 shows the formwork,

cross section; in FIG. 2 - then

same, side view; in fig. 3 - the same

axonometrics; at aig. 4 - view A-A

in fig. one.

25

The formwork contains shields 1 and a connecting element in the form of U-shaped frames 2.

Vertical beams of 3 T-shaped Form are rigidly attached to the boards 1,

30 and the height of the edge 4 beams done

on variable height of shields, minimum in its upper part and maximum in the lower.

Shelves 5 of the beams are located between the supports 2 and 8 fixed to the lateral planes of the uprights of the frames 2, the stops come into contact with the inner side of the shelf 5, and the stops 8 come into contact with the outside. In this case, the beams 3 can freely move relative to the stops 7 and 8 in a vertical position. The lower part of the frame 2 is provided with a stop 9, and in the upper part there are sling loops 10 for the sling of the lifting mechanism. The upper position of the shields 1 relative to the frames 2 is fixed by the pin 11.

The formwork works as follows.

Formwork crane mounted on the frame of the concreted structure. In this case, the shields 1 are in the upper position relative to the frames 2 and fixed with pins 11.

After concreting and partially setting the concrete, before removing the pins, the pins 11 are removed. Stoppers for loops 10 raise the frame 2. The stops 7 and 8 begin to slide along shelf 5. Since shelf 5 is set inclined to shield 1 due to the variable height of rib 4, then when the fingers are further sliding onto the shelf, the forces of detachment of boards 1 from the concrete surface will act . The magnitude of these forces is in direct linear dependence on the angle of inclination of the shelf 5 and can be adjusted.

After the detachment of the shields 1 from the concrete surface, the latter are lowered relative to the frames 2 to the limiter 9.

During the subsequent installation of the formwork on a new area of concrete casting, the frame 2 is lowered down relative to the boards 1 supported on the base, which occupy the top position with the design thickness of the concrete structure to be ensured.

The use of the proposed formwork in the construction of vertical linear structures, mainly walls and foundations, allows a 15–20% reduction in labor costs for formwork works.

Claims (2)

1. USSR Author's Certificate No. 289179, cl. E 04G, 11/20, 1971. 2. Author's certificate of the USSR 5 No. 613059, cl. E 04 G 11/28, 1976 (prototype). } About i Jl // / /. , . V ". Lv J v-i . -o-ts ./ .: D. p. q) ut 2 -four J 7 FIG 4