SU1588872A1 - Method and apparatus for constructing tunnel lining with metal insulation - Google Patents

Abstract

The invention relates to tunneling and reduces the labor intensity and metal consumption in the construction of metal insulating lining (MI) 2. When MI 2 is installed, a space is formed between its surface and the walls of the tunnel. Inside the tunnel place the spacer, perceiving the load of MI 2 and concrete. Concrete is laid in the space between MI 2 and the walls of the tunnel. In the process of placing concrete, tool 14 with a measuring ruler 16 measures the deformation of MI 2. In accordance with the magnitude of the deformation, auxiliary thrust elements 19, hinged between the support thrust elements, are brought into contact with MI 2. At the same time, the area of their contact is changed by installing interchangeable liners 22. Elements 19 are made in the form of light hydraulic cylinders. After the concrete has gained the necessary strength, the spacer is set free, brought to the transport position and moved to the next work site. 2 sec. f-ly, 4 ill.

Description

I. The invention relates to a tunnel structure, namely, to methods for building metal insulating lining and devices for building such objects; delok.

: The aim of the invention is to reduce the laboriousness of the process and the consumption; metal in the construction of lining with me-: taloizol drink.

h Figure 1 shows the mounted; metal insulated and spacer I in transport position, general view; . on FIG. 2 - the same section; : in FIG. 3, a lining with metal insulation and a spacing device put in contact with it are constructed, in general:; view; figure 4 - node 1 fig.Z,

The essence of the proposed method consists in the following. : By means of fasteners, for example, anchors 1, staples 2 of metal insulation are mounted. When installing metal insulation in other conditions, for example, inside prefabricated metal lining, fastening fittings 1 may be strips on a welded or bolted joint. .

When metal and metal erection 2 is installed, a space 3 between the walls of the tunnel and metal insulation 2 is set to the required size. After the metal insulation 2 is fixed along the marker marks, a spacer device is inserted, positioned and fixed with respect to the tunnel axis along the marker marks and entered into contact with the metal plate The thrust elements of the spacer. Then, concrete is fed into space 3, measuring the deformation of metal insulation and increasing, if necessary, the area of contact of the spacer with metal insulation due to the periodic introduction of auxiliary stop elements.

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for example, small hydraulic jacks placed on a spacer. A device for implementing the proposed method includes a portal frame 4 mounted on carriages 5, some of which are driven, and having hydraulic cylinders 6 for lifting the upper part of the frame. The frame moves along track 7 and also carries thrust elements 8 to interact with metal insulator 2, which are fastened with a common longitudinal beam 9. The thrust elements have the form of arches and are hingedly fastened with the spacer cylinders 10, and the upper part 11 of the thrust elements is separated by a movable connection 12 from the side parts. The device is controlled from the console 13,

To control the metal deformation, the device is equipped with devices 14, which can be made either on the basis of known remote measuring devices using a light beam (either electromagnetic or sound waves), or on the basis of contact mechanical measuring devices. In this case, the devices 14 for direct measurement of metal deformation are fixed on the hinge axes 15 on both sides of the spacer. These devices are made of two retractable rails having a gauge 16, which is in contact with metal insulation when measuring

Nearby, the resistors of the device are rigidly connected to each other by means of crosses 17 — for absorbing loads from metal alloys and concrete. To eliminate the metal-bending deflection in the space 18 between adjacent thrust elements (or between the cross beams 17), the device is equipped with a set of additional auxiliary thrust

elements 19, mounted on the hinge axis x 20. Auxiliary thrust elements are made in the form of light hydraulic cylinders, the stem of which is connected to metal metallurgy through a connecting node 21, such as a hinge axis.

The implementation of the proposed method and the operation of the p-: controversial device are as follows.

Metal insulation 2 is mounted on the mounting fittings 1 by means of known lifting devices (not shown) and secured by surveying measurements, leaving the necessary space 3 between the tunnel walls and metal insulation. The spacer is brought into the transport position, for which it is lowered by hydraulic cylinders 6 the upper part 11 of the thrust elements and their side parts are pressed against the housing 4 of the portal frame by hydraulic cylinders 10, and the auxiliary thrust elements 19 are lowered by means of hinges 20 and 21. Then the spacer devices o by means of carriages 5 along the track 7 are introduced into the tunnel and fixed about

The stop elements 8 and I1 are brought into contact with metal insulation 2 by means of hydraulic cylinders IO and 6 and are fixed by surveying. The measuring bars 16 of the devices 14 for measuring the deformations of the metal insulation 2 are brought into contact with the latter, and the distance from the reference point (for example, the tunnel axis) to the metal insulation surface 2 is fixed after fixing it and the distance measuring device by surveying.

Then space 3 is filled with concrete according to a known technology, i.e. by feeding concrete through the concrete line introduced into the end of space 3 and fixed on the auxiliary technological carriage.

When concrete is filled with space 3 (and after filling with concrete before setting), deflections are measured, i.e. deformation of metal insulation 2 in spaces 18, i.e. between adjacent stop elements 8 and between their crossings 17. Measurement is carried out by means of devices 14 In the presence of deflections, metal insulation 2, the values of which exceed the values allowed by the norms, change the mode of laying of concrete

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on, i.e. (as shown by ka) the laying of the concrete layer 23 on the left side is stopped and layer 24 is started to be laid on the right side of the tunnel. At the same time, the contact area of the spacer with metal insulation 2 is also changed. To do this, auxiliary stop elements 19 are brought into contact with metaploisation 2 at those points where the metal insulation deflection begins to exceed the allowable values. The local increase in the contact area and the removal of metal insulations 2 into overall dimensions is combined with the process of placing concrete into space 3.

Claims (2)

After the concrete has gained the necessary strength, the spacer is set free, brought to the transport position and moved to the next work site. Claim 1. Method for constructing a lining of a tunnel with metal insulation, including installation of reinforcement and metal insulation with the formation of the space between its surface and the walls of the tank, placement of a spacer inside the tunnel that absorbs the load from the metal insulation and concrete, and laying concrete into the space between the walls of the tunnel and metal insulation, characterized in that 4TOj, in order to reduce the laboriousness of the process and reduce the consumption of metal, metal deformation is measured in the process of laying concrete and according to etstvii with the strain amount is brought into contact with metalloizol tion auxiliary stop elements, thus alter the area of contact by the plug-chocks 2. Arrangement dp for lining a tunnel with metal insulation, including a portal frame mounted on rail cars, hydraulic jacks tarnished with a portal frame and supporting thrust elements in the form of arches x in the upper part of the portal frame, and additional stop elements made in the form of hydraulic cylinders, hinged between the bearing stop elements and having interchangeable liners 1 Fig.b / / / / X