RU2718861C1 - Method of filling binder with material between pipeline and protective shell thereof at trenchless pipeline laying and device for implementation thereof - Google Patents

Abstract

FIELD: pipelines.

SUBSTANCE: group of inventions relates to pipelines for fluids. Method of filling binder with material between pipeline and its protective shell during trenchless pipeline laying includes well preparation technology and placement of protective shell in it, technology of input into inner cavity of protective shell of pipeline with uniform filling of annular space with binding material along whole length of section of trenchless pipeline laying. Device for filling binder with material between pipeline and its protective shell during trenchless pipeline laying includes head with two connected to it pipelines, bridges for rigid attachment of the head on the plug, which is rigidly connected to the pipeline, rope, stop for pulling the rope and solution ducts into the well.

EFFECT: invention can be used in construction and/or reconstruction of sections of pipelines laid in tunnels (micro tunnels) and protective cases, including at pipeline crossings through natural and artificial obstacles.

2 cl, 2 dwg

Description

The invention relates to the field of pipelines for fluids (various networks of engineering and technical support, as well as oil and oil pipelines) and can be used in the construction and / or reconstruction of sections of pipelines laid in tunnels (microtunnels) and protective cases, including at the transitions of pipelines through natural and artificial obstacles.

When laying pipelines in areas with non-standard distances from buildings and structures, at intersections with water bodies, protective structures, various transport communications, in rough and swampy terrain, there is a need to increase their load-bearing capacity and tightness by filling the space between the pipeline and its protective material with cementing material a shell, which is understood as a lining of a tunnel (microtunnel) or a protective case, when trenchless laying a pipeline, under which Niemann viscous mass consisting of one or more substances and having the property of hardening by certain physical-chemical processes.

When considering the technical literature, a number of technical solutions related to this issue were identified.

A known method of repairing a culvert under an embankment, including filling the annulus with concrete solution, mounting sections with a certain pitch of the control pipes protruding into the annulus, initial filling concrete annulus through windows located in the upper part of the side walls of the section to the lower level windows and a window plug, filling the ceiling part of the annular space with concrete through the first tube until concrete exits in the second tube, plugging in the first tube and feeding the concrete through the second conduit to its exit into the next tube and implementation of successive similar operations on all the sections (patent RU 2341612, cl. E01F 5/00, publ. 21.12.2008, the bulletin №35).

A known system for crossing a trunk pipeline through a road and a method for manufacturing it, comprising a fill manifold of a protective casing, which is formed in a protective casing together with an output collector mounted on top of the protective casing, a plastic mass based on synthetic high molecular weight compounds, filling the annulus with liquid and plastic mass under pressure by injection molding (patent for invention RU 2426930, class F16L 7/00, published on 08/20/2011, Bulletin No. 23).

The disadvantages of these technical solutions are:

limited area of application, which does not allow their use in trenchless pipelines and at crossings over water barriers

the difficulty of ensuring the filling of the annulus with binder without the formation of voids.

Closest to the claimed utility model is a method of filling the annular space with solutions when laying the main pipelines in the casings and tunnels, containing two injection pipelines that are fed into the annular space from one of the ends of the tunnel junction, roller or roller-free bearing guide rings of the injection pipelines to ensure unhindered displacement of discharge pipelines in the annulus, auxiliary pit for machine installation supplying injection pipelines to the annulus, a solution having a density of more than 1100 kg / m3, viscosity (according to Marsh) of not more than 80 s and setting time of not less than 98 hours (application for invention RU 2426930, class F16L 1/028, publ. June 27, 2017, Bulletin No. 18)

The disadvantages of this technical solution are:

the difficulty of ensuring the filling of the annulus with cementitious material in the descending sections of the tunnel passage without the formation of voids;

insufficient use of traction forces necessary to move the pipeline inside the containment at the ascending sections of the tunnel passage, due to the need to additionally overcome the gravity of the solution and water, which pre-fill the inner cavity of the containment.

The problem solved in the invention is to eliminate these drawbacks by applying a method that ensures uniform filling of the annular space with binder along the entire length of the trenchless pipeline section and reduces traction required to move the pipeline inside the protective sheath in its ascending and horizontal sections.

The technical result of the invention is to increase the efficiency of trenchless laying of the pipeline with filling with the cement material the space between the pipeline and its protective sheath.

The problem is solved, and the technical result is achieved as a result of the fact that according to the invention, the method of filling with a binder material the space between the pipeline and its protective shell during trenchless laying of the pipeline is that:

- before starting the drilling of a well to ensure the input of a device for filling with a binder material the space between the pipeline and its protective sheath during trenchless laying of the pipeline, an emphasis with a cable is rigidly attached to the tunnel equipment, to the cable

two solution pipelines are connected, the cable is placed together with the pipelines in the inner cavity of the containment shell and the well is drilled with the simultaneous introduction of the containment and the rope with the pipelines into it;

- after completion of the drilling of the well and the introduction of the protective sheath and the cable with the solution pipelines into it, the cable is disconnected from the stop, the solution pipelines are disconnected from it and connected to the injection unit, the freed end of the cable is connected to the traction mechanism, the opposite ends of the cable and solution pipelines are fixed on the head in front of the initial section wells;

- at the end of the pipeline, placed in a protective sheath, the cap is rigidly fixed and rigidly attached to it using jumpers head;

- simultaneously with the tension of the cable, the binder through the pipelines is fed into the space between the tip and the plug installed on the pipeline, thereby ensuring uniform filling of the space between the pipe and its protective shell by the binder and reducing the friction force when moving the pipe inside the protective shell.

The problem is solved, and the technical result is also achieved as a result of the fact that according to the invention, a device for filling with cementitious material the space between the pipeline and its protective shell during trenchless laying of the pipeline includes a head with two mortar pipes connected to it, jumpers for rigidly fastening the head to the plug, rigidly attached to the pipeline, cable, emphasis for pulling the cable and mortar lines into the well, and:

- the emphasis has a rigid connection with the tunneling equipment, which ensures the pulling of the cable and mud pipelines simultaneously with the development of the well;

- jumpers have a length at which the distance between the end part of the tip and the plug is approximately 0.5 of the inner diameter of the protective sheath;

- the tip has a diameter of approximately 0.9 of the inner diameter of the containment.

The invention is illustrated in FIG. 1 and 2.

In FIG. 1 shows a schematic diagram of filling the space between the pipeline and its protective shell with a binder during trenchless laying of the pipeline in the development stage of the well for the protective shell with a binder.

In FIG. 2 shows a schematic diagram of filling the space between the pipeline and its protective shell with a binder during trenchless laying of the pipeline in the stage of dragging the pipeline inside the protective shell.

In FIG. 1 and 2 the following notation is used:

1 - well;

2 - emphasis;

3 - tunneling equipment;

4 - cable;

5 - a protective shell;

6 - pipeline;

7 - tip;

8 - mortar line;

9 - jumper;

10 - a stub.

The method of filling with a binder material the space between the pipeline and its protective shell during trenchless laying of the pipeline and a device for its implementation are implemented as follows.

Before starting the drilling of the well 1, the tunneling equipment 3 is prepared by rigidly attaching a stop 2 to its rear end surface, to which the end of the cable 4 is attached. The ends of two solution lines 8 are connected to the cable 4 and the cable 4 with solution lines 8 is placed in the inner cavity of the protective shell 5. Perform drilling a well with the simultaneous introduction of a protective sheath 5 and a cable 4 with mud pipelines into it 8. At the end of the device of a well 1 and introducing a protective sheath 5 and a cable 4 with mud ducts 8, the cable 4 is disconnected from the stop 2, disconnect the ends of the solution lines 8 attached to it from the cable 4 and connect them to a discharge unit (not shown). The freed end of the cable 4 is attached to a traction mechanism (not shown).

The opposite ends of the cable 4 and mortar lines 8 are fixed on the head 7, which is installed in front of the initial section of the well 1. At the same time, a pipe 6 is mounted on a specially prepared site (not shown) and a plug 10 is rigidly fixed at its initial end, to which it is rigidly connected with jumpers 9 tip 7.

Pipeline 6 is introduced into the inner cavity of the protective sheath 5, for which a cable 4 is pulled by means of a traction mechanism (not shown), at the same time, an injection unit (not shown) is turned on and binder is fed into the space between the head 7 and the pipe a plug 10 and evenly fill with binder material the space between the pipe 6 and the protective sheath 5. This ensures a decrease in the friction force when moving the pipe 6 inside the protective sheath 5. By as the pipeline 6 moves in the inner cavity of the protective sheath 5, the pipelines 8 are removed from the protective sheath 5.

Installation of a device for filling with a binder material the space between the pipeline 6 and its protective sheath 5 during trenchless laying of the pipeline 6 is carried out after extraction from the well 1

sinking equipment 3 and disconnecting the cable 4 with mortars 8 from the stop 2. The head 7 is made in the form of a cone-shaped cylinder with a diameter approximately equal to 0.9 of the inner diameter of the protective sheath 5. In the head 7, two through holes with nozzles are made at an equal distance from its axis (not shown) to ensure the connection of mortar lines 8 and the movement of binder along them. The tip 7 with the help of jumpers 9 is rigidly connected to the plug 10, rigidly fixed to the pipe 6 so that the distance between the end part of the tip 7 and the plug 10 is approximately 0.5 of the inner diameter of the protective shell 5.

Thus, as a result of the implementation of the proposed technical solution, it is possible to increase the efficiency of trenchless laying of the pipeline with filling the space between the pipeline and its protective shell by binder due to the uniform filling of the annular space with binder along the entire length of the trenchless laying of the pipeline and reducing traction required to move the pipeline inside the containment at its ascending and horizontal sections.

Claims (9)

1. The method of filling with a binder material the space between the pipeline and its protective shell during trenchless laying of the pipeline, which consists in the fact that: - before starting the drilling of a well, to ensure the introduction of a device for filling with a binder material the space between the pipeline and its protective shell during trenchless laying of the pipeline, an emphasis with a cable is rigidly attached to the tunnel equipment, two solution pipelines are attached to the cable, the cable is placed together with the solution pipelines in the inner cavity of the protective shell perform well drilling with simultaneous introduction of a protective sheath and a cable with mud pipelines into it; - after completion of the drilling of the well and the introduction of a protective sheath and a cable with solution pipelines into it, the cable is disconnected from the stop, the solution pipelines are disconnected from it and connected to the injection unit, the freed end of the cable is connected to the traction mechanism, the opposite ends of the cable and solution pipelines are fixed on the head in front of the initial section wells; - at the end of the pipeline, placed in a protective sheath, the cap is rigidly fixed and rigidly attached to it using jumpers head; - simultaneously with the tension of the cable, the binder through the pipelines is fed into the space between the tip and the plug installed on the pipeline, thereby ensuring uniform filling of the space between the pipe and its protective shell by the binder and reducing the friction force when moving the pipe inside the protective shell. 2. A device for filling with a binder material the space between the pipeline and its protective shell during trenchless laying of the pipeline, including a head with two mortar pipes connected to it, jumpers for rigidly fastening the head on a plug rigidly attached to the pipeline, a cable, an emphasis for pulling the cable and mortar pipes into well, moreover: - the emphasis has a rigid connection with the tunneling equipment, which ensures the pulling of the cable and mud pipelines simultaneously with the development of the well; - jumpers have a length at which the distance between the end part of the tip and the plug is approximately 0.5 of the inner diameter of the protective sheath; - the tip has a diameter of approximately 0.9 of the inner diameter of the containment.

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