SU939692A1 - Form for erecting monolithic ferroconcrete walls simultaneously with lining - Google Patents

Description

(54) FORMWORK FOR THE CONSTRUCTION OF MONOLITHIC

REINFORCED CONCRETE WALLS WITH SIMULTANEOUS

FACING

one

The invention relates to monolithic construction and is intended for the construction of single-layer and laminated walls with simultaneous tiling.

Known sliding formwork, consisting of a jacking frame with a hydraulic jack fixed on it, was circling, shuttering boards and a supporting vacuum shield with vacuum pumps connected to the vacuum pump 1.

With this formwork, walls are built with simultaneous lining. Before concreting the walls in the formwork install facing plates, which are fixed in the desired position with the help of vacuum suction cups. The use of suction cups and a vacuum pump makes the formwork maintenance difficult: dusting the surface of the facing slabs under construction conditions reduces the reliability of the vacuum pump. When thin and porous facing plates are used, the reliability of their retention in the working position by means of vacuum is also reduced.

Formwork for erecting monolithic walls with simultaneous lining, including formwork panels consisting of a deck and a support part 2, is also known.

Fixing of cladding plates in this formwork is carried out by temporary fasteners, the installation and disassembly of which requires considerable labor costs.

The purpose of the invention is to reduce labor costs for formwork work.

The goal is achieved by the fact that in the formwork for the construction of monolithic reinforced concrete walls with simultaneous lining, including inner and outer shields, each of which consists of a deck and a supporting part, the outer shield is equipped with electromagnets, and its deck is made of two elements in thickness. between which electromagnets are installed, one of the elements is made of a diamagnetic material, the other is made of ferromagnetic material, and the formwork is equipped with a device for regulating the voltage applied to the electromagnets.

Claims (2)

FIG. 1 shows the proposed formwork, transverse section; in fig. 2 — node I in FIG. one; in fig. 3 - facing plate, insulation and fasteners, axonometrics; in fig. 4 is a schematic diagram of the device for adjusting the voltage applied to the electromagnets. The formwork consists of an outer shield 1, an inner shield 2, electromagnets 3 and a device 4 for controlling the voltage applied to the electromagnets. The outer shield 1 is made of a support part 5 and a deck consisting of a diamagnetic element 6 and a ferromagnetic element 7, between which electromagnets 3 are installed. element 6 is attached longitudinal strips 13, which serve as supports for facing plates. The device 4 for regulating the voltage supplied to the electromagnets consists of a two-pole circuit breaker 14, a variator 15, a step-down transformer 16 of single-pole and automatic circuit breakers 17, and a voltmeter 18. The formwork is installed as follows. The outer shield 1 of the formwork is set at the design mark, the circuit breaker 14 is turned on, and by turning the knob of the autotransformer 15, an initial voltage of about 20-25 V is applied to the circuit, at which the pulling force. The electromagnets 3 are sufficient to hold the facing plates on the shield and it is possible to move the plates along the surface of the shield (without detachment from it). By alternately turning on the switches 17, they supply power to the electromagnets of individual rows and lay the facing plates on the formwork panel from bottom to top. Before turning on the electromagnets of a given row, the plates of the previous row, etc., are laid. Before pouring the concrete mixture with an autotransformer, the voltage is increased to a limiting value (30-36 V) in order to increase the attracting force and prevent the facing plates from falling out during vibration. Then install the inner shield 2 and pour the concrete mixture into the space between the two shields. At the end of concreting, the switches 17 are turned off and the power is removed by turning off the switch 14. After the concrete has been hardened and stripped, a monolithic laminated wall with lining is obtained. Claims. Formwork for the erection of monolithic reinforced concrete walls with simultaneous lining, including internal and external shields, each of which consists of a deck and a support part, with the help of that. that, in order to reduce labor costs for formwork, the outer shield is equipped with electromagnets, and its deck is made in thickness of two elements between which electromagnets are installed, one of which is made of diamagnetic material, and the other is made of ferromagnetic material. 2. The formwork according to claim 1, characterized in that it is provided with a device for regulating the voltage applied to the electromagnets. Sources of information taken into account during the examination 1. USSR author's certificate No. 490923, cl. E 04 G 11/22, dated 1975 2. USSR author's certificate number 648706, cl. E 04 G 11/00, 1978, (prototype). I 1 hr 9 W TO 12 5 VXAjA: :: 15