RU144480U1 - FORMWORK FOR CONSTRUCTION OF CONCRETE FASTENERS OF TUNNELS - Google Patents

Abstract

Formwork for the erection of concrete tunnel supports, including formwork-cladding and end formwork-sealer, made in the form of an elastic inflatable chamber with a sponge gasket fixed on the outside of the inflatable chamber and in contact with the working surface, characterized in that in the outer end part of the formwork - Facings are located supporting skis.

Description

The claimed technical solution relates to mining, in particular, to the conduct of mine workings, fixed with concrete support. The inventive utility model can be used in coal and ore mines, as well as in the construction of tunnels for various purposes.

A known formwork for concreting a tunnel lining, adopted as a prototype, consisting of a formwork-cladding and an end formwork made in the form of an elastic inflatable chamber, on the outer surface of which there is a sponge material gasket for pressing against the walls of the excavation and sealing the formwork space filled with concrete (ed. St. No. 1180513 of the USSR, E21D 11/00 Formwork for concreting the tunnel lining / V. F. Ilyushin, V. M. Nasberg. 35).

A disadvantage of the known formwork-cladding for concreting the tunnel lining is that when it is installed in the required position, the outer end rests on the soil produced by the end formwork, made in the form of an elastic inflatable chamber, on the outer surface of which a sponge gasket is fixed. In this case, under the influence of the weight of the formwork of the cladding, crushing will occur, and possibly the destruction of the elastic inflatable chamber. In this case, there will be a violation of the alignment of the formwork-cladding with the mine working and sealing of the formwork space intended for filling with concrete will not be ensured, which, ultimately, will not provide high-quality construction of the concrete roof support of the tunnel.

The technical result of the utility model is to increase the efficiency and ensure the quality of the construction of concrete tunnel supports.

The specified technical result of the claimed technical solution is achieved by the fact that the formwork for the erection of concrete roof support for tunnels, including the formwork-cladding and the end formwork-sealer, made in the form of an elastic inflatable chamber with a sponge material fixed from the outside of the inflatable chamber and in contact with the surface of the mine , according to the utility model, in the outer end part of the formwork-cladding are supporting skis.

The inventive utility model is illustrated by drawings, where in FIG. 1 shows the position of the formwork for erecting concrete support for tunnels, and in FIG. 2 - view of the formwork from the side of its outer end.

The inventive formwork for the construction of concrete lining of tunnels includes a formwork-cladding 1 (Fig. 1 and 2), on the outer end of which there is an end formwork-sealant 2, made in the form of an elastic inflatable chamber with a sponge material fixed from the outside of the inflatable chamber and contacting the surface of the mine, and support skis 3.

The inventive utility model works as follows.

After cementing section of tunnel 4 with concrete (Fig. 1), formwork 1 moves to the position of the next fixed section, then compressed air is supplied to the inflatable chamber of the end formwork-sealant 2, which expands by pressing the sponge material against the surface of the walls of the mine working, sealing the formwork space, where concrete mixture is then fed.

In this case, the support skis 3 located on the outer end of the formwork 1 prevent the lowering of the outer part of the formwork on the excavation soil, thereby ensuring the alignment of the formwork 1 with the mine working 4 and eliminating the possibility of crushing the end formwork-sealant 2.

The advantages of the proposed technical solution are that, in the outer end part of the formwork 1 there are supporting skis 3, which create support points and ensure alignment conditions of the formwork 1 and the fixed tunnel 4 when it is installed for concreting the next section of the tunnel, and eliminating the possibility of crushing the end formwork-sealant 2, made in the form of an elastic inflatable chamber, which, ultimately, ensures the quality of the construction of concrete lining of tunnels and the durability of the formwork.

The effectiveness of the proposed formwork for the construction of concrete lining of tunnels is evaluated by:

- the presence of supporting skis in the outer end of the formwork;

- elimination of skew and misalignment of the formwork and mining;

- preventing crushing of the end formwork-sealant, made in the form of an elastic inflatable chamber;

- improving the quality of concreting and the durability of the formwork.

Claims (1)

Formwork for the erection of concrete tunnel supports, including formwork-cladding and end formwork-sealer, made in the form of an elastic inflatable chamber with a sponge gasket fixed on the outside of the inflatable chamber and in contact with the working surface, characterized in that in the outer end part of the formwork - Facings are located supporting skis.