RU2474694C2 - Device for connection of shafts of underground facilities of subway - Google Patents

Abstract

FIELD: mining.

SUBSTANCE: device for connection of shafts of underground facilities includes an adapter tubing ring installed between cast-iron and concrete liners and consisting of normal, adjacent and key tubings, which are made in the form of box-shaped cast-iron casting of rectangular shape in plan view. Tubings are connected to each other through openings in vertical walls with bolted connections with water-proof and hold-down washers. On inner surface of each cast-iron casting there are internal circumferential and vertical stiffeners with formation of internal caissons. In the centre of each of the above tubings there made is a backfill hole with reinforcement for a threaded blanking plug, and in the middle circumferential rib - four rigging holes located at equal distance from vertical symmetry axis of the tubing. In lower circumferential wall of each tubing of the adapter ring there are bolted holes which are uniformly distributed along its diameter and serving for connection of the above ring to cast-iron tubing liner. In upper circumferential wall of each tubing there is one inclined bolted hole serving for connection of the tubing of the adapter ring to concrete liner. On vertical and circumferential walls of tubings of the adapter ring, and embossed groove is made for a sealing element.

EFFECT: improving the quality and reliability of connection between concrete and tubing liners of transient tunnels of subways.

3 cl, 12 dwg

Description

The invention relates to a tubing lining of shafts of underground tunnels that are passable by the caisson method in the construction of subways, and in particular, to devices for interfacing and joining cast-iron tubing rings with concrete lining with an outer diameter of 6 or more meters installed in distillation tunnels and tunnels of the metro with waterproofing of connected seams between the lining links.

Known for the tubing support of mine shafts, including tubing laid in a tubing column, while gaskets for waterproofing the supports are attached to the sides of the tubing (German patent No. 1253746, class 19F 5/04, 1967). However, this lining has a complex design of waterproofing seams, which, in addition to continuous gaskets glued to the sides of the tubing, also has a waterproof cord, welded into special grooves in the tubing.

The existing cast-iron tubing lining, assembled from tubing rings interconnected by bolted joints with sealing elements, secures the production in the ground, protects the interior of the tunnel from water ingress and accepts the loads provided for by SNiP II-40-80. Despite the positive qualities of the existing tubing lining, it also has drawbacks consisting in uneven design and the lack of reliable sealing of joints between elements of cast-iron lining.

Closest to the proposed device for pairing and docking shafts of underground structures (prototype) is the well-known lowering support of mine shafts made of supporting reinforced concrete and metal rings, interconnected by bolted connections (as USSR AS No. 1055763, class E21D 5 / 08, 1955).

The disadvantages of this design of the lowering supports made of joined metal and concrete rings include significant labor costs associated with ensuring equal strength and tightness of the joints between the rings, as well as the difficulty in ensuring the joints of the metal tubing lining with a monolithic concrete lining and the lack of complete sealing of their joints.

The basis of the claimed invention is the task of creating an equal-strength construction of the assembled parts of the underground shafts, ensuring reliable coupling of the metal tubing lining with concrete lining, improving the sealing of joints between the tubing in the tubing ring, ensuring the high strength characteristics of the latter.

The problem is solved in that the claimed device for pairing and docking trunks of underground metro structures, including a cast-iron lining of the trunk, assembled from a number of interconnected metal tubing rings, a concrete lining made in the form of a monolithic concrete ring, sealing and fastening elements, equipped installed between the cast-iron and concrete lining transitional tubing ring, consisting of normal, adjacent and key tubing, each made in the form of a box oh iron casting rectangular shape in plan. The tubing is interconnected through holes in the vertical sides by bolted joints with waterproofing and clamping washers. Moreover, on the inner surface of each cast iron casting, internal circular and vertical stiffeners are made, forming internal caissons. In the center of each of the mentioned tubings with reinforcement for the threaded plug-plug, a grouting hole is made, and in the middle circular rib there are four rigging holes equidistant from the vertical axis of symmetry of the tubing. In the lower circular side of each tube of the adapter ring, bolt holes are made evenly distributed over its diameter and used to mate the specified ring with a cast-iron tubing lining, and in the upper circular side of each tube there is one inclined bolt hole used to interface and dock the tube of the adapter ring with concrete lining. Moreover, on the vertical and circular sides of each of the transition ring tubings, in addition to the embossing groove, additional grooves are made for sealing the joints between the cast iron tubing and the concrete lining connected with them. Moreover, the thickness of the circular side of the transitional tubing ring, paired with a concrete lining, exceeds the thickness of the side, paired with a cast-iron tubing lining.

The proposed device for pairing and docking trunks of the subway is illustrated by drawings, which depict:

figure 1 - General view of the device Assembly;

figure 2 - type A (transitional tubing ring);

figure 3 is a section bB in figure 1;

figure 4 is a cross-section bb in figure 1 (the connection element of the cast iron lining and the adapter ring);

in Fig.5 is a section GG in Fig.1 (an element for connecting a concrete lining and a transition ring);

figure 6 - remote element D in figure 2 (elements of the connection and sealing of the adapter ring);

in Fig.7 is a view of E in Fig.2 (box-shaped cast-iron casting of a rectangular outline in plan);

on Fig - view W in Fig.7;

figure 9 is a cross-section ZZ in Fig.7;

figure 10 is a section II in figure 7;

figure 11 is a cross section KK in Fig;

Fig.12 is a cross-section LL in Fig.7.

The claimed device for interfacing and docking underground shafts includes a transitional tubing ring 3 installed between a cast-iron tubing lining 1 and a concrete lining made in the form of a monolithic concrete ring 2. The transition ring 3 consists of normal, adjacent and key tubings, each of which is made in the form of a box-shaped cast iron casting M of rectangular shape in plan. The indicated tubes of the adapter ring 3 are interconnected along the vertical sides by bolted connections 4 with waterproofing 5 and clamping 6 washers. On the inner surface of each cast iron casting M, internal circular 7 and vertical 8 stiffeners are made, forming internal caissons N. In the center of each of the above tubing with reinforcement for the threaded plug, a plug 9 is made, in the middle circular rib 7 there are four rigging holes 10 equidistant from the vertical axis of symmetry of the tubing, and in the vertical rib 8 there are three additional rigging holes.

In the lower circular board of each casting M (tubing) of the adapter ring 3 there are bolt holes 11 (at least 45 holes in the adapter ring) uniformly distributed over its diameter and used to interface the ring with a cast-iron tubing lining 1. And in the upper circular board of each the adapter ring tubing 3 has one inclined bolt hole 12 (a total of 12 holes in the adapter ring), which is used to interface and dock the adapter ring tubing with concrete lining 2.

On the vertical and circular sides of each of the tubings of the adapter ring 3, in addition to the embossing groove 13, additional grooves 14 are made for sealing the joint by means of gaskets 15. Moreover, the thickness n of the circular side of the adapter tube 3 connected to the concrete lining 2 exceeds the thickness m its side, associated with a cast-iron tubing lining 1.

The assembly of the tubing lining of the shafts of underground metro structures is as follows.

To the installation site of the subway trunk, where the monolithic concrete ring 2 is located, tubings (normal, adjacent and key) of the adapter ring 3 are fed for their pairing and docking with the concrete ring. At the beginning, the lower normal tubing is lowered and joined with the concrete ring 2 by combining the holes 12 and installing bolted joints in them with sealing and clamping washers. Then, the second and subsequent tubings are docked both with the concrete ring 2 and with each other by combining the holes 11 and installing botanical connections in them. The key tubing is installed last, mating and joining it through the indicated holes 11 and 12. Then all bolted joints are tightened, preliminary installing the gaskets 15, after which the necessary sealing ring elements are installed and the mating part of the adapter ring 3 is connected with the cast-iron tubing lining 2.

Thus, the use of a transitional tubing ring allows for high-quality and reliable joining between concrete and tubing lining of the transition tunnels of the subways with full sealing of joints between all elements of the lining.

Claims (3)

1. A device for connecting and docking trunks of underground metro structures, including a cast-iron lining of the trunk, assembled from a number of interconnected metal tubing rings, a concrete lining made in the form of a monolithic concrete ring, sealing and fastening elements, characterized in that it is equipped installed between cast iron and concrete lining transitional tubing ring, consisting of normal, adjacent and key tubing, each made in the form of a box-shaped cast iron of a rectangular shape in plan and interconnected through holes in the vertical sides by bolted connections with waterproofing and pressure washers, on the inner surface of each cast iron casting, circular and vertical stiffening ribs are made with the formation of internal caissons, in the center of each of these tubing with reinforcement for a screw plug - the plug has a grouting hole, and in the middle circular rib - at least four rigging holes equidistant from the vertical axis of symmetry tubing, while in the lower circular side of each tubing of the adapter ring there are bolt holes uniformly distributed over its diameter and used to mate the specified ring with a cast-iron tubing lining, and in the upper circular side of each tubing there is one inclined bolt hole used for mating and docking the adapter ring tubing with concrete lining, and on the vertical and circular sides of each adapter ring tubing, a chased groove is made for the sealing element. 2. The device according to claim 1, characterized in that on the vertical and circular sides of each of the tubes of the adapter ring, additional grooves are made to seal the joints between the cast-iron tubing and the concrete lining associated with them. 3. The device according to claims 1 and 2, characterized in that the thickness of the circular side of the transitional tubing ring mated with concrete lining exceeds the thickness of the side mated with cast-iron lining.

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