SU928024A1 - Prefabricated ferroconcrete tunnel lining - Google Patents

Description

(54) PRECAST CONCRETE COATING OF TUNNELS

one

The invention relates to tunnel and metro construction.

It is known to connect the blocks to each other by means of linings and fl anchor bolts.

. The disadvantage of this connection is the limited scope, since it can be used only when connecting the joints of the profile beams of limited types of blocks.

The closest to the technical essence and the achieved effect is a prefabricated reinforced concrete lining of the tunnel, consisting of rings, which are connected to each other tray and normal reinforced concrete blocks with liners in the castle part 2

A disadvantage of the known lining is that it has practically no connection between the tray blocks and the adjacent normal ones, as in the transverse ones. and in the longitudinal direction. Therefore, during the operation of the tunnels, built in sandy water-saturated soils.

there may be cases of communication failure between the chute and adjacent normal ring blocks, and the lining is sealed by opening the joints due to the drawdown of the chute block, which causes water to flow in the B tunnel with soil removal. The purpose of the invention is to increase the rigidity of the crater of the reinforced concrete lining and ensure the tightness of the joints.

This chain is achieved by the fact that the tray and adjacent normal blocks are interconnected by means of a reinforcement cage connected to them by beams on anchor bolts, and the beams are installed so that the lining rings can be connected along the tunnel axis.

Claims (2)

FIG. 1 shows the lining of the tunnel, a general view; in fig. 2 - the fastening unit of the tray and adjacent to the nor.mal block. The ring 1 of the team lining of the tunnel contains a tray block 2, normal blocks 3, which are fixed between themselves using mounting pins 4, inserts 5. Tray block 2 and each of normal blocks 3 adjacent to it are interconnected as well rings, reinforcing cages 6, which are fixed by one side on the tray blocks 2, and the other on the normal blocks 3 adjacent to the tray 2 blocks using longitudinal links of channels) 7 attached to blocks 2 and 3 using anchor bolts 8, are forgotten drilled in blocks of drill holes 9. The order of mounting the team lining is not normal. The tray block 2 is placed close to the previously mounted lining ring 1, then the blocks 3 and the remaining blocks with studs 4 and liners 5 are alternately connected to it. and adjacent normal blocks 3, holes 9, install anchor bolts 8 in them and fill them with cement-sand mortar M-200, put reinforcement cages 6, attach them to the tray 2 and normal blocks 3 with longitudinal links (channels) 7 when using anchor) No. 1x of bolts 8. After 30 m, breaks in the reinforcement cages 6 and longitudinal links (channels) are provided. 7. The reinforcement cage was concreted simultaneously with the laying of track concrete. The developed lining design provides increased rigidity and resistance of block joints in the tray section, tunnel lining erected in water-saturated sands, during operation from dynamic loads during train movement. The present invention allows to extend the field of application of precast concrete lining, i.e. apply it in sandy, water-saturated soils instead of cast iron. Claims of the Invention Prefabricated reinforced concrete lining of tunnels, consisting of rings, including tray and normal blocks, on T.L. interconnected by means of a reinforcement cage connected to them by means of beams on. anchor bolts, with the beams installed with the possibility of connecting the lining rings, along the tunnel axis. Sources of information taken into account in the examination 1.Patent of Germany No. 18163 2, cl. E 211) 11/22, published. 1974. 2. A typical project for the construction of precast reinforced concrete lining of metropolitan distilleries. M., Metrogiprotrans, Kom TS-84, 1978 (prototype). KH ,