RU2647257C2 - Method for production of encased pipe with cable-conduit - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: steel pipe with an anticorrosive coating is installed on the assembly stand. Along its surface, a reinforcing cage is constructed, consisting of longitudinal and annular reinforcement bars. On the frame the cable-conduit is placed in the form of a protective tube. The tube is placed in a mould and a concrete mix is poured into the space between the tube and the mould. After the concrete strength is set, the tube is removed from the mould.

EFFECT: high reliability associated with the placement of the cable-conduit in the thickness of the concrete coating of the pipeline and the technology of its fastening.

9 cl, 1 dwg

Description

The invention relates to pipeline technology, to pipes with ballast coating, used when laying pipelines on sea shelves, waterways, in flooded or wetlands, as well as in underground or above-ground pipelines in permafrost, seasonally frozen and slightly bearing soils.

When designing pipeline crossings, the pipeline often accompanies a satellite cable located parallel to the pipeline and designed to monitor and control various processes associated with the operation of the pipeline using specialized signal transformations of communication channels (telemechanization). By appointment, telemechanization means include telecontrol devices (control of operating modes, ensuring reliable functioning), telealarm systems (for transmitting emergency and warning signals), telemetry (for measuring pressure, temperature, vibrations, stress-strain state, corrosion state of a pipeline, etc.) .

Laying a satellite cable, which is a communication channel with the above purpose and located parallel to the pipeline, requires additional costs of materials, labor and time.

A known method of restoring a pipeline, where the placement of the cable channel is made directly in the pipeline. At the same time, a section of the existing pipeline is cleaned, after which a perforated (with holes in the thickness of the pipe wall) pipeline of smaller diameter is dragged into the pipe. Then, the perforated pipeline is centered relative to the existing pipeline using hydraulic system elements, after which cement mortar is pumped into the annulus between the existing and perforated pipeline. Further, a communication cable — JPH 02120589 (a), 1990, is mechanically pulled into the hole of the perforated pipe.

The known method of equipping a concrete pipe with a communication channel has the following disadvantages.

Limited application due to the fact that the installation of a perforated pipeline with a cable channel and its concreting are performed only when restoring an existing pipeline, but not during the construction of a new one.

The process of concreting a perforated pipe is carried out under route conditions, which can create difficulties when performing all technology operations (including quality control operations).

The cable channel is a hole in the thickness of the wall of the perforated pipe, it is protected by a layer of concrete only from the outside and in case of damage to the perforated pipe from the inside, for example, when it is worn, the cable channel is also damaged, resulting in a risk of cable damage.

The dimensions of the cable channel are determined by the standard size of the perforated pipe and the dimensions of the existing pipeline, which requires the manufacture of perforated pipes to the appropriate size of the restored pipeline.

In connection with these shortcomings, the technical problem solved by the invention is to create a method for producing a concrete pipe with a cable channel, which is used in the manufacture of sections of a new pipeline in the factory, has high reliability associated with the placement of the cable channel in the thickness of the concrete coating of the pipeline , as well as universality, as does not require the use of high-tech additional elements (in a known solution, these are perforated pipes). In this case, the cable channel is intended for laying a communication cable, and / or signaling, and / or monitoring.

This problem is solved in a method of manufacturing a concrete pipe with a cable channel, in which the pipe is placed on an assembly stand, a reinforcing cage consisting of longitudinal and annular reinforcement rods is installed along its surface, the cable channel is placed in the form of a protective tube on the frame, the pipe is placed in the concrete mixture is pumped into the mold and into the space between the pipe and the mold, after the concrete has set strength, the pipe is removed from the mold.

In addition, specific process steps are proposed, comprising the following:

- use metal, or polymer, or metal-plastic, or composite pipes; when using a metal pipe, an anti-corrosion coating is applied to it;

- the protective tube of the cable channel is made of polymer, or composite, or metal;

- the protective tube of the cable channel is corrugated or perforated;

- the reinforcing cage is centered relative to the pipe using clamps; the frame is made of steel or composite reinforcement;

- the concrete mixture is reinforced with fiber;

- an additional thermo-waterproofing coating is applied to the pipe. The method is illustrated by the device implementing it.

The drawing shows a view of a pipe with a reinforcing cage placed on its surface and a cable channel in the form of a protective tube on the surface of the cage.

The device comprises a pipe 1, which may be metal, or polymer, or metal-plastic, or composite. The drawing shows the location of the pipe 1 in the form 2 for subsequent pouring with concrete mixture, which when reinforced with fiber acquires additional strength, durability, water resistance and frost resistance. Along the surface of the pipe 1, a reinforcing cage 3 is installed, consisting of longitudinal and annular reinforcement rods, which are centered relative to the pipe 1 with the help of clamps 4.

On the frame 3, from its inner or outer side, there is a cable channel in the form of a protective tube 5 made of polymer, or composite, or metal. When using a cable channel for signaling, the protective tube 5 is corrugated or perforated.

The placement of the cable channel in the form of a protective tube 5 on the reinforcing cage 3 gives the strength of the entire structure, thereby increasing its reliability.

After the process of pouring concrete mixture into mold 2 and building up concrete strength, pipe 1 is removed from mold 2, which is used for concrete coating of subsequent pipes.

When using metal pipes, they are coated with an anticorrosion coating to prevent corrosion and, additionally, a heat-waterproofing coating is used to reduce heat and energy losses of the transported substance, and when laid in permafrost soils, to prevent thawing of permafrost.

Thus, in the proposed method for producing a concrete pipe in a horizontal manner in the form, the problem of placing the cable channel in the thickness of the concrete coating of the pipe using a reinforcing cage is solved. At the end of the whole process, the pipe has an external coating in the form of exposed concrete. This method allows to obtain pipes with a cable channel for laying communication cables, and / or signaling, and / or monitoring, with high reliability, strength and versatility in use.

Claims (9)

1. A method of manufacturing a concrete pipe with a cable channel, in which the pipe is placed on an assembly stand, a reinforcing cage consisting of longitudinal and annular reinforcement rods is installed along its surface, the cable channel is placed in the form of a protective tube on the frame, the pipe is placed in a mold and concrete mixture is pumped into the space between the pipe and the mold, after the concrete has set strength, the pipe is removed from the mold. 2. The method according to p. 1, wherein metal, or polymer, or metal-plastic, or composite pipes are used. 3. The method according to p. 2, in which an anti-corrosion coating is applied to a metal pipe. 4. The method according to p. 1, in which the protective tube of the cable channel is made of polymer, or composite, or metal. 5. The method according to p. 1, in which the protective tube of the cable channel is corrugated or perforated. 6. The method according to p. 1, in which the reinforcing frame is centered relative to the pipe using clamps. 7. The method according to claim 1, wherein the reinforcing cage is made of steel or composite reinforcement. 8. The method according to p. 1, in which the concrete mixture is reinforced with fiber. 9. The method according to p. 1, in which an additional thermo-waterproofing coating is applied to the pipe.

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