RU69155U1 - END FENCING FOR CONSTRUCTION OF A LAYER OF CONCRETE FASTENERS BY APPLIANCES - Google Patents

Abstract

The end guard is made of a sleeve-shell placed between the formwork and the contour of the development of the sleeve-shell from a filtering liquid material. The manufacture of a sleeve-shell from a non-woven synthetic material or from several layers of burlap simplifies the design, increases the speed of construction of the end fence and the quality of the seal outside the formwork space. 2 ill.

Description

The utility model relates to mining and can be used when attaching underground mine workings with the formation of a layer of concrete lining.

There is a method of erecting lining of mine workings (see copyright certificate SU No. 1027400, IPC 7 E21D 11/00), including the erection of a layer of concrete facing bearing shell behind formwork. To prevent the hardening material of the shell from flowing out, an end guard (end wall) is installed on the formwork. Typically, such an end wall is made of a set of scraps of boards of various lengths, which is very laborious and does not prevent the outflow of part of the hardening material.

A device for attaching mine workings is known (see patent RU No.2010975, IPC 7 E21D 11/00), which is an end guard of the formwork space in the form of a sleeve-shell of a waterproof material with a shutoff pipe.

When filling the sleeve-shell with a liquid mixture of hardening material, the latter is bursting between the formwork and the output circuit, after which the liquid concrete mixture is supplied for the formwork.

The disadvantages of the known device is the accumulation of the liquid phase of the concrete mixture in the upper part of the sleeve-shell, which, when erecting the next support lug, represents a relatively fragile section

lining, as well as the fact that the sleeve-shell of a waterproof material must be a certain length.

The purpose of the utility model is to simplify the design and accelerate the construction of the end fence.

In the proposed utility model, including well-known features: a sleeve-shell installed between the formwork and the working loop, a nozzle with a shut-off valve, the goal is achieved in that the sleeve-shell is made of a liquid-filtering material.

Figure 1 shows the end guard, General view.

Figure 2 shows a section of a sleeve-shell.

The end guard for erecting a layer of concrete lining with fittings consists of a sleeve 3 made of a liquid filtering material placed between the formwork 1 and the working loop 2. The pipe 4 serves to feed into the sleeve a liquid hardening material (concrete mortar).

End guard works as follows.

After installing the formwork 1, under the loose working space at the edge of the formwork, a sleeve 3 of liquid-filtering material is laid. Then in the upper part of the sleeve 3 through the pipe 4 serves hardening material (solution) with a certain water-cement ratio. The solid phase of the solution settles in the lower parts of the sleeve 3, and the liquid phase of the solution (water with an insignificant amount of cement) is filtered through the walls of the sleeve and flows to the working soil. In this case, the sleeve 3 overlaps the space between the formwork 1 and the output circuit 2, repeating its shape. After filling the sleeve 3 with the mortar, the pipe 4 is blocked (bandaged), and mortar or concrete is supplied to the formwork space from the side of the previously erected support lining, the hardened sleeve 3 at the end of the formwork prevents its outflow.

The use of 3 non-woven synthetic materials or several layers of burlap for the sleeve 3 simplifies its design and increases the speed of erecting the end fence.

Claims (1)

An end guard for erecting a layer of concrete lining with inserts, including a sleeve-shell placed between the formwork and the working loop with a nozzle for supplying mortar, characterized in that the sleeve-shell is made of a liquid-filtering material.