CN115041905A - Method for installing pipeline in tunnel - Google Patents

Abstract

The embodiment of the invention provides a method for installing pipelines in a tunnel, and belongs to the field of pipeline engineering. The method for installing the pipeline in the tunnel comprises the following steps: acquiring relevant information of a tunnel, wherein the relevant information comprises curve and straight information, inclination angle information and width information; determining categories corresponding to the tunnels according to the related information, wherein the categories comprise a first tunnel category and a second tunnel category; determining a pipeline installation strategy corresponding to the type according to the corresponding relation between the pre-stored tunnel type and the pipeline installation strategy, wherein the pipeline installation strategy comprises welding in an automatic welding mode, the pipeline installation strategy comprises a first strategy corresponding to the first tunnel type and a second strategy corresponding to the second tunnel type, the first strategy adopts a tunnel external welding mode, and the second strategy adopts a tunnel internal welding mode; and carrying out pipeline installation on the tunnel according to the pipeline installation strategy corresponding to the category. The embodiment of the invention can realize the automatic welding process of the pipeline passing through the tunnel.

Description

Method for installing pipeline in tunnel

Technical Field

The invention relates to the field of pipeline engineering, in particular to a method for installing pipelines in a tunnel.

Background

At present, in the process of installing and constructing pipelines, particularly pipelines in tunnels, a plurality of pipeline sections need to be assembled and welded, the existing welding process usually adopts a manual welding process or a semi-automatic welding process, if the manual welding process is adopted, the construction efficiency is low, and if the semi-automatic welding process is adopted, quality problems such as welding cracks and the like are easy to occur. Therefore, the automatic welding construction process for realizing the pipeline crossing tunnel is in urgent need to be solved.

Disclosure of Invention

An object of an embodiment of the present invention is to provide a method for installing a pipe in a tunnel, which solves one or more of the problems in the prior art.

In order to achieve the above object, an embodiment of the present invention provides a method for installing a pipeline in a tunnel, including:

acquiring relevant information of a tunnel, wherein the relevant information comprises curve and straight information, inclination angle information and width information;

determining the category corresponding to the tunnel according to the related information, wherein the category comprises a first tunnel category and a second tunnel category, the first tunnel category is the tunnel category without a slope change point and a turning point, the inclination angle is smaller than a preset inclination angle and the width is smaller than a preset width threshold, the second tunnel category is the tunnel category with the slope change point and/or the turning point and the width is larger than or equal to the preset width threshold, the slope change point is the position where the tunnel turns in the longitudinal direction, and the turning point is the position where the tunnel turns in the transverse direction;

determining a pipeline installation strategy corresponding to the type according to the corresponding relation between the pre-stored tunnel type and the pipeline installation strategy, wherein the pipeline installation strategy comprises welding in an automatic welding mode, the pipeline installation strategy comprises a first strategy corresponding to the first tunnel type and a second strategy corresponding to the second tunnel type, the first strategy adopts a tunnel external welding mode, and the second strategy adopts a tunnel internal welding mode;

and carrying out pipeline installation on the tunnel according to the pipeline installation strategy corresponding to the category.

In the embodiment of the present invention, the pipeline installation of the tunnel according to the pipeline installation strategy corresponding to the category includes:

determining a pipeline installation strategy corresponding to the category as a first strategy;

the method comprises the following steps that a tunnel portal at one higher position in a tunnel is provided with an assembly welding platform and a first winch, and a tunnel portal at one lower position in the tunnel is provided with a second winch, wherein the inclination angle of the assembly welding platform is equal to that of the tunnel;

sequentially welding the pipe sections on the assembly welding platform in an automatic welding mode to obtain welded pipe sections;

the welded pipe sections are conveyed into the tunnel through the cooperation of the transport vehicle and the first winch and the second winch so as to realize pipeline installation in the tunnel.

In an embodiment of the invention, the transport vehicle comprises a rail vehicle and the bottom of the tunnel is provided with rails.

In an embodiment of the present invention, before the welded pipe section is transported into the tunnel by the rail car cooperating with the first hoisting machine and the second hoisting machine, the method further includes:

and performing at least one of welding seam detection, corrosion prevention joint coating and sand blasting rust removal on the welded pipe section.

In the embodiment of the present invention, the preset inclination angle is 15 °.

In the embodiment of the invention, the length range of the assembly welding platform comprises 28-75 m, the height of the assembly welding platform does not exceed 6m, and the width range of the assembly welding platform comprises 10-16 m.

In an embodiment of the present invention, a transportation vehicle cooperating with a first winding machine and a second winding machine to transport a welded pipe section into a tunnel includes:

and placing the welded pipe section on a rail car, connecting one end of the rail car with a steel wire rope of a first winch through a first pipe supporting head, connecting the other end of the rail car with a steel wire rope of a second winch through a second pipe supporting head, and starting the first winch and the second winch to drag the rail car into the tunnel along the rail.

In the embodiment of the present invention, the pipeline installation of the tunnel according to the pipeline installation strategy corresponding to the category includes:

determining the pipeline installation strategy corresponding to the category as a second strategy;

determining that the tunnel comprises a slope changing point or a turning point;

arranging pipe inlet platforms at two ends of the tunnel respectively, wherein each pipe inlet platform comprises a winch, and a track is laid at the bottom of the tunnel;

conveying a steering joint into the tunnel from one end of the tunnel by matching a rail car with a winch until the steering joint reaches a slope changing point or a turning point;

sequentially conveying the pipe sections from the two ends of the tunnel to the two sides of the steering joint through a rail car;

and after the pipe sections completely reach the tunnel, the pipe sections are welded in an automatic welding mode so as to realize the pipeline installation in the tunnel.

In the embodiment of the invention, the inclination angle ranges of the sub-tunnels on two sides of the slope changing point or the turning point of the tunnel respectively comprise 0-28 degrees and 0-15 degrees.

In the embodiment of the present invention, after the pipe sections are sequentially transported from both ends of the tunnel to both sides of the knuckle by the rail car, the method further includes:

temporary supports are arranged below the pipe sections to support the pipe sections, and the rail car is withdrawn before the next temporary support is installed until the pipe distribution of all the pipe sections is completed.

In the embodiment of the present invention, the method further includes: and after the pipe sections are completely welded, arranging pipe supports at preset intervals in the tunnel to support the pipes.

In the embodiment of the invention, the range of the preset distance comprises 15-25 m.

The method for installing the pipeline in the tunnel obtains the relevant information of the tunnel, wherein the relevant information comprises the curve straight information, the inclination angle information and the width information, determining the corresponding category of the tunnel according to the related information, wherein the first tunnel category is the tunnel category without the slope changing points and the turning points, the inclination angle is smaller than the preset inclination angle and the width is smaller than the preset width threshold value, the second tunnel category is the tunnel category with the slope changing points and/or the turning points and the width larger than or equal to the preset width threshold value, and determining the pipeline installation strategy corresponding to the type according to the corresponding relation between the pre-stored tunnel type and the pipeline installation strategy, wherein the pipeline installation strategy comprises welding in an automatic welding mode, the first tunnel type corresponds to the first strategy, the second tunnel type corresponds to the second strategy, and then pipeline installation is performed on the tunnel according to the pipeline installation strategy corresponding to the type. According to the scheme, the type of the tunnel is determined according to the characteristics of the tunnel, and then the corresponding pipeline installation strategy is selected according to the type of the tunnel, the pipeline installation strategy adopts a full-automatic welding mode for welding, so that the problems of low construction efficiency caused by manual welding and welding cracks caused by semi-automatic welding process welding can be avoided, the construction efficiency and the engineering quality are improved, the construction period is shortened, and the full-position automatic welding process that the pipeline passes through the tunnel is realized.

Additional features and advantages of embodiments of the invention will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the embodiments of the invention without limiting the embodiments of the invention. In the drawings:

fig. 1 is a schematic flow chart showing a method of installing a pipe in a tunnel according to an embodiment of the present invention;

FIG. 2 is a schematic diagram illustrating the manner in which the pipe is installed by welding the pipe outside the hole and then sending it into place in one embodiment of the present invention;

FIG. 3 is a schematic diagram illustrating a pipe installation process performed by pipe laying in a hole and then assembly welding according to an embodiment of the present invention;

FIG. 4 is a schematic illustration of a pipe transportation rail according to an embodiment of the present invention;

figure 5 shows schematically a pipe running block according to an embodiment of the invention;

FIG. 6 is a schematic illustration of an intake platform in accordance with an embodiment of the present invention;

FIG. 7 schematically illustrates a pipeline hoisting pipeline using an arc-shaped moving gantry in an embodiment of the present invention;

FIG. 8 is a schematic representation of the plan of the pipe run in the tunnel according to one embodiment of the present invention;

FIG. 9 schematically illustrates a schematic view of a conduit support in an embodiment of the invention;

figure 10 schematically illustrates a tunnel with conduits in place according to an embodiment of the invention.

Description of the reference numerals

1 first type tunnel 2 two-to-one pipeline

3 group welding platform 4 guide pulleys

5 steel wire rope 6 hoist

7 ground anchor 10 tunnel of the second kind

20 pipeline 30 first advances a tub platform

40 second pipe feeding platform 50 guide pulley

60 wire rope 70 hoist

80 track 90 rail car

510 pipe clamp 520 pipe

710 arc removes gallows 720 nylon davit area

730 hook 740 hand hoist

750 pipeline 760 pier

810 door style of calligraphy tubing hanger 820 fortune pipe dolly

1001 tunnel 1002 pipe support

1003 temporary support 1004 jack

1005 pipeline assembly welding

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating embodiments of the invention, are given by way of illustration and explanation only, not limitation.

Fig. 1 schematically shows a flow chart of a method for installing a pipe in a tunnel according to an embodiment of the present invention. As shown in fig. 1, in the embodiment of the present invention, a method for installing a pipeline in a tunnel is provided, which may be described by taking the method as an example for being applied to a processor, and specifically may include the following steps:

step S102, acquiring relevant information of the tunnel, wherein the relevant information comprises curve and straight information, inclination angle information and width information.

And step S104, determining the corresponding category of the tunnel according to the related information, wherein the category comprises a first tunnel category and a second tunnel category, the first tunnel category is the tunnel category which has no slope changing point and turning point, the inclination angle is smaller than the preset inclination angle and the width is smaller than the preset width threshold, the second tunnel category is the tunnel category which has the slope changing point and/or the turning point and the width is larger than or equal to the preset width threshold, the slope changing point is the position where the tunnel turns in the longitudinal direction, and the turning point is the position where the tunnel turns in the transverse direction.

And S106, determining a pipeline installation strategy corresponding to the type according to the corresponding relation between the pre-stored tunnel type and the pipeline installation strategy, wherein the pipeline installation strategy comprises welding in an automatic welding mode, the pipeline installation strategy comprises a first strategy corresponding to the first tunnel type and a second strategy corresponding to the second tunnel type, the first strategy adopts a tunnel external welding mode, and the second strategy adopts a tunnel internal welding mode.

And S108, installing the pipeline of the tunnel according to the pipeline installation strategy corresponding to the category.

It can be understood that the tunnel, i.e. the tunnel to be constructed, i.e. the tunnel in which the pipeline needs to be installed, the relevant information of the tunnel to be constructed may specifically include curve and straight information of the tunnel (i.e. whether there is a slope change point and/or a turning point), inclination angle information of the tunnel (i.e. slope information), width information in the tunnel, etc., where the slope change point is a position where the tunnel turns in the longitudinal direction, and the turning point is a position where the tunnel turns in the transverse direction, i.e. the curve and straight condition of the tunnel includes both the curve and straight condition in the longitudinal direction and the curve and straight condition in the transverse direction. The preset width threshold is a preset width value in the tunnel with automatic welding construction conditions, such as 20 meters. The preset inclination angle is a preset maximum tunnel inclination angle corresponding to the first tunnel type, for example, 16 °.

Specifically, the processor may obtain relevant information (including curve and straight information, inclination information, and width information) of the tunnel, and may further determine a category corresponding to the tunnel according to the relevant information, if there is no slope change point and turning point in the tunnel, the inclination is smaller than a preset inclination, and the width is smaller than a preset width threshold (i.e., no automatic welding construction condition is provided), the tunnel may be determined as a first tunnel category, if there is a slope change point and/or a turning point in the tunnel, and the width is greater than or equal to a preset width threshold (i.e., an automatic welding construction condition is provided), the tunnel may be determined as a second tunnel category, and further may determine a corresponding pipeline installation policy according to a specific tunnel category according to a pre-stored correspondence between the first tunnel category and a first policy, and a correspondence between the second tunnel category and a second policy, where regardless of the first tunnel category or the second tunnel category, all adopt the mode of automatic welding to weld the pipeline section, the mode of automatic welding can be for example through full-automatic welding machine or welding robot to weld the pipeline section after the group to can carry out the pipeline installation to the tunnel according to the pipeline installation tactics that correspond, the treater can be based on the corresponding actuating mechanism of pipeline installation tactics control promptly and go to carry out specific pipeline installation action.

The method for installing the pipeline in the tunnel acquires the relevant information of the tunnel, wherein the relevant information comprises the curve information, the inclination angle information and the width information, determining the corresponding category of the tunnel according to the related information, wherein the first tunnel category is the tunnel category without the slope changing points and the turning points, the inclination angle is smaller than the preset inclination angle and the width is smaller than the preset width threshold value, the second tunnel category is the tunnel category with the slope changing points and/or the turning points and the width larger than or equal to the preset width threshold value, according to the pre-stored corresponding relation between the tunnel type and the pipeline installation strategy, the pipeline installation strategy corresponding to the type is determined according to the type, the pipeline installation strategy comprises welding in an automatic welding mode, the first tunnel type corresponds to the first strategy, the second tunnel type corresponds to the second strategy, and then pipeline installation is carried out on the tunnel according to the pipeline installation strategy corresponding to the type. According to the scheme, the type of the tunnel is determined according to the characteristics of the tunnel, and then the corresponding pipeline installation strategy is selected according to the type of the tunnel, the pipeline installation strategy adopts a full-automatic welding mode for welding, so that the problems of low construction efficiency caused by manual welding and welding cracks caused by semi-automatic welding process welding can be avoided, the construction efficiency and the engineering quality are improved, the construction period is shortened, and the full-position automatic welding process that the pipeline passes through the tunnel is realized.

In one embodiment, the pipeline installation of the tunnel according to the pipeline installation strategy corresponding to the category includes: determining a pipeline installation strategy corresponding to the category as a first strategy; the method comprises the following steps that a tunnel portal at one higher position in a tunnel is provided with an assembly welding platform and a first winch, and a tunnel portal at one lower position in the tunnel is provided with a second winch, wherein the inclination angle of the assembly welding platform is equal to that of the tunnel; sequentially welding the pipe sections on the assembly welding platform in an automatic welding mode to obtain welded pipe sections; the welded pipe sections are conveyed into the tunnel through the cooperation of the transport vehicle and the first winch and the second winch so as to realize pipeline installation in the tunnel.

Understandably, the assembly welding platform can be used for assembling and welding the pipe sections, the inclination angle of the assembly welding platform is equal to that of the tunnel, and the welded pipe sections are conveniently sent into the tunnel.

Specifically, when the category corresponding to the tunnel is the first tunnel category, it may be determined that the pipeline installation policy is the first policy, and then the assembly welding platform and the first hoisting machine may be disposed at the tunnel entrance at the higher side in the tunnel, the second hoisting machine may be disposed at the tunnel entrance at the lower side in the tunnel, and the pipe segments are sequentially welded on the assembly welding platform in an automatic welding manner, for example, two pipe segments may be prefabricated on the assembly welding platform, the pipe segments after two prefabricated are first transported into the tunnel, and then the other pipe segments after two prefabricated and one prefabricated are second welded with the pipe segments after two prefabricated and entering the tunnel at the tunnel entrance to obtain the welded pipe segments, and such repetition is repeated, and the welded pipe segments may be transported into the tunnel by the transportation vehicle in cooperation with the first hoisting machine and the second hoisting machine, to achieve installation of the pipes in the tunnel, it is understood that the first strategy is a way to tack weld outside the tunnel and then send it into place inside the tunnel.

In one embodiment, the transport vehicle may comprise a rail car, and the bottom of the tunnel is paved with rails.

It will be appreciated that the bottom of the tunnel is provided with rails for the rail cars to travel on the rails, and further that the bottom of the assembly welding platform may also be provided with rails from which the transport cars may travel.

In another embodiment, the transport vehicle can also be a wheel type trolley, at the moment, tracks do not need to be laid at the bottom of the tunnel and/or the assembly welding platform, the pipe sections can be lifted to the wheel type trolley through a crane, and then the welded pipe sections are conveyed into the tunnel through the wheel type trolley. Meanwhile, the installation position of the trolley is planned, and the trolley is prevented from stopping at the position of the pipe pier to influence the construction of the pipe pier.

In one embodiment, before the welded pipe section is conveyed into the tunnel by the rail car matching with the first winding machine and the second winding machine, the method further comprises the following steps: and performing at least one of welding seam detection, corrosion prevention joint coating and sand blasting rust removal on the welded pipe section.

It can be understood that after welding, at least one of the processes of crater detection, corrosion prevention and repair and sand blasting and rust removal needs to be carried out on the welded pipe section so as to control the welding quality.

In one embodiment, the preset inclination angle is 15 °.

It is understood that a tunnel category having a tunnel inclination angle of less than 15 ° and no gradient point or turning point, and a width of less than a preset width threshold may be determined as the first tunnel category.

In one embodiment, the length of the assembly welding platform ranges from 28 m to 75m, the height of the assembly welding platform does not exceed 6m, and the width of the assembly welding platform ranges from 10m to 16 m.

In one embodiment, the method for transporting the welded pipe section into the tunnel by the transport vehicle matched with the first winding machine and the second winding machine comprises the following steps: and placing the welded pipe section on a rail car, connecting one end of the rail car with a steel wire rope of a first winch through a first pipe supporting head, connecting the other end of the rail car with a steel wire rope of a second winch through a second pipe supporting head, and starting the first winch and the second winch to drag the rail car into the tunnel along the rail.

In one embodiment, the pipeline installation of the tunnel according to the pipeline installation strategy corresponding to the category includes: determining the pipeline installation strategy corresponding to the category as a second strategy; determining that the tunnel comprises a slope changing point or a turning point; arranging pipe inlet platforms at two ends of the tunnel respectively, wherein each pipe inlet platform comprises a winch, and a track is laid at the bottom of the tunnel; conveying a steering joint into the tunnel from one end of the tunnel by matching a rail car with a winch until the steering joint reaches a slope changing point or a turning point; sequentially conveying the pipe sections from the two ends of the tunnel to the two sides of the steering joint through a rail car; and after the pipe sections completely reach the tunnel, the pipe sections are welded in an automatic welding mode so as to realize the pipeline installation in the tunnel.

Specifically, when the category corresponding to the tunnel is the second tunnel category, it may be determined that the pipe installation policy is the second policy, further determining the number of the slope changing points or turning points in the tunnel, when one slope changing point or turning point is included in the tunnel, arranging pipe inlet platforms at the two ends of the tunnel respectively, wherein the pipe feeding platform comprises a winch, a track is laid at the bottom of the tunnel, a steering joint is conveyed into the tunnel from one end of the tunnel by a rail car matched with the winch until the steering joint reaches a slope changing point or a turning point, pipe sections are sequentially conveyed to two sides of the steering joint from two ends of the tunnel by the rail car, after all the pipe sections reach the tunnel, the pipe sections are welded in an automatic welding mode to realize the installation of the pipes in the tunnel, and understandably, the second strategy is a mode of arranging the pipes in the tunnel and then welding the pipes in an assembling mode.

In one embodiment, the inclination angle ranges of the sub-tunnels on both sides of the slope-changing point or the turning point of the tunnel respectively include 0-28 degrees and 0-15 degrees.

Understandably, the original tunnel can be divided into two sub-tunnels by the slope changing point or the turning point, and the inclination angles of the two sub-tunnels respectively can be 0-28 degrees and 0-15 degrees.

In one embodiment, after the pipe sections are sequentially conveyed from the two ends of the tunnel to the two sides of the steering joint by the rail car, the method further comprises the following steps: temporary supports are arranged below the pipe sections to support the pipe sections, and the rail car is withdrawn before the next temporary support is installed until the pipe distribution of all the pipe sections is completed.

In one embodiment, further comprising: and after the pipe sections are completely welded, arranging pipe supports at preset intervals in the tunnel to support the pipes.

It will be appreciated that the conduit support is used to support the conduit and the predetermined distance is a preset conduit support spacing distance.

In one embodiment, the predetermined distance is in a range of 15-25 m.

In a specific embodiment, as shown in fig. 2 and 3, the method for installing a pipeline in a tunnel may specifically include the following steps:

for the first type of tunnel 1 (i.e. the first tunnel type, as shown in fig. 2), the pipeline installation is performed by welding the tunnel outside the hole and then sending it into place. The first type of tunnel is a tunnel without a slope change point or a turning point in the tunnel, the slope is less than 15 degrees, the construction space in the tunnel is narrow, and the tunnel does not have automatic welding construction conditions (for example, a double-pipe laid tunnel is built, automatic welding construction is not considered during original tunnel design, and the clearance width of the two sides of a pipeline to be constructed after pipe arrangement of the tunnel is less than 0.8 m). In addition, the terrains outside the tunnel mouths on the two sides of the first type of tunnel have the conditions of building construction prefabricated platforms and installing construction hoisting equipment, namely, platforms or gentle slopes with the length not less than 30m and the width not less than 20m are arranged on the extension lines of the tunnel mouths on at least one side.

For the second type of tunnel 10 (i.e., the second tunnel type, as shown in fig. 3), the pipeline installation is performed by laying pipes in the hole and then assembling and welding the pipes. Here, the second type tunnel 10 is a tunnel in which a slope-changing point or a turning point exists in the tunnel and the construction space in the tunnel has automatic welding construction conditions (for example, a tunnel in which the clearance width between both sides of the pipeline to be constructed and the tunnel wall is not less than 0.8m after the pipe arrangement is completed). In addition, the slope changing point or the turning point refers to that the tunnel is turned longitudinally or transversely, and a prefabricated bent pipe needs to be installed when the pipeline construction is carried out.

In an exemplary embodiment, as shown in FIG. 2, the installation of the pipe by welding out of hole and then sending it into place may include:

the assembly welding platform 3 and the first winch are arranged on one side of the tunnel, the second winch is arranged on the other side of the tunnel, and a track (not shown in figure 2) is laid on the bottom of the tunnel in the whole course. Here, the welding platform 3 and the first hoisting machine are usually arranged on the upper side of the first type of tunnel. The first winch and the second winch respectively comprise a winch 6, a steel wire rope 5 and a corresponding guide pulley 4. In addition, the first winch and the second winch can be respectively provided with a ground anchor 7 so as to be better fixed on the ground.

And (3) performing two-to-one prefabrication on the back dragging pipe section on the assembling and welding platform 3 in advance, and performing two-to-one welding on the prefabricated two sections of pipelines at the tunnel portal to obtain a two-to-one pipeline 2 during formal back dragging.

The two-by-one pipe 2 is fed into the tunnel by means of a rail car (not shown in fig. 1) in conjunction with a first hoist and a second hoist. Specifically, the pipeline after two-in-one connection can be placed on a rail car on the assembly welding platform 3, one end of the pipeline 2 after two-in-one connection is connected with a steel wire rope of a first winch, the other end of the pipeline is connected with a pipe supporting head, the pipe supporting head is connected with a steel wire rope of a second winch, and the first winch and the second winch are started to drag the pipeline into a tunnel along a rail. And repeating the operation sequence to install the pipelines until the installation of the pipelines in the whole first type of tunnel is completed.

In an exemplary embodiment, the tunnel-in-pipe installation method may further include: before the pipelines are sent into the tunnel, the two-to-one pipelines are subjected to processes of weld joint detection, corrosion prevention joint coating, sand blasting, rust removal and the like.

In an exemplary embodiment, the length of the assembly welding platform can be 28-75 m, the height can be no more than 6m, and the width can be 10-16 m. In the exemplary embodiment, the inclination angle of the first type tunnel may be 0-15 °, and the inclination angle of the assembly welding platform is the same as that of the first type tunnel. The following describes the construction process of automatic welding pipeline for the first type of tunnel in detail:

1. pipeline installation is carried out in a mode of firstly welding outside a hole and then sending in place

1.1 preparation of tunnel portal welding construction site

The assembly welding outside the tunnel requires that the inlet and the outlet of the tunnel are wide, and sufficient space is provided for a welding construction site. For the situation that the site of the tunnel portal has a slope, the adopted solving methods are as follows:

1) incorporate tunnel design with tunnel portal welding place, before tunnel construction, dig to the tunnel portal place and fill out and level, be favorable to tunnel construction promptly, also guaranteed welding construction needs.

2) For a field with a small gradient, a welding prefabricated platform with the length of 65m and the width of 15m can be formed by adopting a filling pile, and the flatness of a pipeline at a welding section is ensured.

Facilities such as a temporary pipe piling field, a tool shed, a duty room, a film washing room (arranged according to needs) and the like are required to be arranged in the welding field.

1.2 prefabrication of pipes

At least one full-automatic welding machine set and one detection machine set are arranged in each tunnel, 4-5 welding craters are welded every day, nondestructive testing is carried out immediately after welding is finished, and the pipe is dragged into the tunnel after the detection is qualified. For example, the full-automatic machine set configuration can be 1 internal welding machine + double-torch full-automatic welding machine.

Here, the crater detects and should follow the welding progress, and the welding is carried out on the same day and is detected, sandblast rust cleaning and anticorrosive processes such as in order to avoid the condition that the unit nest worker appears.

1.3 pipe-in-place protocol

1.3.1 pipe in place

The pipe may be in place in two ways:

1) the method is characterized in that a wheel type trolley is adopted, each steel pipe is provided with the wheel type trolley, the height of a pipeline loaded by the trolley is slightly higher than that of a pipe pier, and after the pipeline is completely pulled in place, the pipe pier in the tunnel is constructed. And after the pipe pier is maintained, the pipeline is supported by using the jack, the trolley is removed, and the jack is put down to enable the pipeline to fall on the pipe pier, so that the pipeline is in place. The method requires that the ground in the hole is level, the central line is placed in the hole, and the walking deviation of the control pipeline is measured at any time in the traction process so as to reduce the difficulty of adjusting the position of the pipeline left and right when the pipeline is in place. Meanwhile, the installation position of the trolley is planned, and the trolley is prevented from stopping at the position of the pipe pier to influence the construction of the pipe pier.

2) The rail car can be adopted, the rail car supports the pipeline to run on a pre-installed rail, the pipeline runs in the mode without deviation, and the deviation of the center line of the pipeline in place can be guaranteed to be within an allowable error range. The track and rail car may be incorporated into the design as a permanent facility for the pipe support. If wheeled equipment is used for traction, the trolley is prone to left-right deviation, once deviation occurs, the position correcting difficulty is high, and in order to guarantee the center line deviation of the pipeline in position, a track method is generally adopted for dragging the pipeline in position.

In addition, the traction pipeline uses a winch with an independent large rope capacity winding drum, when the rope length exceeds the capacity of the winding drum, the rope capacity of the winding drum can be changed into an empty winding drum by cutting off a steel wire rope when the rope capacity of the winding drum reaches the limit, so that the problem of the rope capacity of the winch in the long-distance tunnel is solved.

In the exemplary embodiment, as shown in fig. 3, the installing the pipeline by laying the pipe in the hole and then assembling and welding may include:

a first pipe feeding platform 30 and a second pipe feeding platform 40 are arranged at two ends of a second type of tunnel, the first pipe feeding platform 30 and the second pipe feeding platform 40 respectively comprise a winch 70, a guide pulley 50 and a steel wire rope 60, and a track 80 is laid at the bottom of the tunnel in the whole course.

The rail car 90 is matched with the winch 70 to convey the steering elbow into the tunnel from one end of the tunnel, the steering elbow is arranged after the steering elbow reaches a specified position, and then the pipeline is conveyed into the tunnel and the straight-line-segment pipelines on two sides of the steering elbow are arranged respectively through the pipe inlet platforms at two ends of the tunnel.

And after the pipe distribution is finished, performing assembly welding, weld joint detection and anticorrosion joint coating construction, and finishing the installation of the pipelines in the tunnel from inside to outside and from the middle to two sides.

In one embodiment, the inclination angles of the two ends of the second type tunnel curve can be respectively 0-28 degrees and 0-15 degrees.

In an exemplary embodiment, transporting the conduit into the tunnel may include:

the pipeline 20 is loaded on a rail car 90 of the pipeline feeding platform by a crane, the pipeline is placed in place by a winch 70 in a tail sliding mode, a pipeline support is arranged below the pipeline to support the pipeline, the rail car is withdrawn before the next pipeline support is installed, and the steps are repeated until all pipeline arrangement is completed.

In an exemplary embodiment, the automatic welding construction method further comprises the step of installing stainless steel support pipe clamps at intervals of 15-25 m in the tunnel after the pipeline welding is completed.

The following describes the automatic pipeline welding construction process for the second type of tunnel in detail:

2. pipeline installation is carried out by arranging pipes in holes and then assembling and welding

2.1 track layout

And paving light rails on the pipe inlet platform and in the tunnel in a full length manner for the passing of rail cars. Here, a number 10 channel steel can be adopted on the second type of tunnel bottom plate to arrange temporary tracks along the tunnel, the track center line is consistent with the designed pipeline center line, and the track width is 800-1200 mm. For example, the track pitch may be 0.8m, the tracks may be welded together by full welding with a steel plate of 16mm thickness every 2m, and the tracks may be connected to the concrete floor by expansion bolts, and the track pitch deviation may not exceed 2mm as the pipe transportation track, as shown in fig. 4.

Here, the rail car can be refitted by adding steel wheels on the pipeline bracket. The track car has the wheel track of 0.8m and the wheel diameter of 0.3m, the chassis can adopt 14# channel steel, the car length is 0.65m, the car width is 1m, and the pipeline is hooped by adopting a self-made pipe hoop, as shown in figure 5.

When the rail is installed, the adjustment and the fixing position can be carried out through the sleeper gasket and the sizing block. In order to ensure the safety of the track, D20 steel bars can be welded at the lower edge of the track every 2m to stabilize the track. The length of the reinforcing steel bars is preferably not to obstruct the running of the rail car.

And after the steel rail is installed, measuring the central line of the line, the elevation of the steel rail, the gauge and the curve alignment vector so as to accurately adjust the alignment of the steel rail. And then, at the pre-embedded sizing block, firmly welding the rail and the sizing block together according to the design requirement, wherein the height of a welding line is not less than 10 mm.

2.2 Rust removal and protection of pipe orifices

And (3) carrying out sand blasting and rust removing treatment on the pipe orifice of the steel pipe, and sealing and protecting the pipe orifice by using articles such as adhesive tapes and the like after the sand blasting and rust removing reach the grade so as to prevent oxidation and rust.

2.3 pipeline transportation and hoisting

1) The anti-corrosion pipe transport vehicle should adopt rubber plate gasket measures, and rubber plates or other soft material gaskets should be added at the contact positions of the binding ropes and the pipes.

2) The pipes must be tied up firmly in the transportation process, 2 binding devices are adopted to be fixed on the transport vehicle, and steel plate baffles with the thickness of 10mm and the height of 500mm are welded at the front end and the rear end of the transport vehicle in order to prevent the pipelines from being damaged and from rolling and shooting.

3) The special sling is used for loading and unloading the anti-corrosion pipe, the surface which is in contact with the pipe is lined with rubber or other soft materials, the rough loading and unloading operation is strictly forbidden, and special attention is paid to the protection of the pipe orifice.

2.4 making platform for entering pipe at two ends of tunnel

In order to facilitate the pipeline to enter and exit the tunnel portal, a special pipe inlet platform is erected at the exit of the tunnel at two banks by adopting steel pipes and steel plates, the platform can be provided with railings as shown in figure 6, and the slope angles of the platform are respectively consistent with those of the tunnel. Before the platform is built, the original simple work shed is dismantled.

2.5 hoist and wire rope selection

According to the stress condition of the steel pipe in the tunnel, 15T electric windlasses can be selected as windlasses at two ends of the tunnel, and a guide pulley block is arranged at a slope changing point in the tunnel. The wire rope specification is 6 multiplied by 19S + FC, and the diameter phi is 18 mm.

2.6 piping

And (4) loading the pipeline into the rail car of the pipeline inlet platform by using a crane, and unloading the pipeline by using the crane after the pipeline is bound and fixed and the winch is started in place. In order to ensure that the pipe smoothly enters the tunnel, a winch and a tail are adopted to be matched for transportation, careful operation is carried out, the pipe is placed at a constant speed, stable walking is realized, after the pipe reaches the position, the pipe is pulled to the position through a winch, a pipe clamp is loosened after the pipe is in the position, a gantry crane and a chain block are adopted to hoist the pipe to vertically lift a single pipe to a certain height, then the pipe is temporarily supported and supported by adopting a rail as the pipe below, the central line of a temporary support of the pipe is consistent with the central line of the pipe, horizontal displacement is not needed, and the schematic diagram of the pipe hoisted by an arc-shaped moving gantry can be as shown in figure 7. And a 10mm rubber is padded on the support to protect the anticorrosive coating. The rail car is withdrawn before the second pipe support is installed. Repeating the steps until the steel pipes are distributed. The gantry crane is manufactured according to the size of the tunnel, 4 wheels are mounted at the bottom of the gantry crane and used for moving in the tunnel, and the distance between the gantry crane and the tunnel wall is at least 200mm and the distance between the gantry crane and the steel pipe is at least 300 mm.

The temporary pipe pier is arranged on the pipeline design installation axis, and sleepers are used as the temporary pipe pier, so that the work load of secondary hoisting of the pipeline in place is reduced.

The steel pipe is placed and is supported on two wooden interim pipe piers, the top surface height of wooden interim pipe pier should be higher than design nonrust steel pipe card arcwall face inboard 100mm, and the interim pipe pier must avoid design pipe pier position, and the pipeline transports the planar schematic diagram of cloth pipe in the tunnel can be as shown in fig. 8.

2.7 pipe pairing

After the pipeline reaches the assembly position, the pipeline to be assembled is respectively hoisted by two gantry cranes, and the pipeline is finely adjusted by moving a hand-operated block on the gantry cranes, so that the pipeline reaches the assembly requirement. When the pair is paired, operators are required to be arranged on the left side and the right side of the pipeline, and the left side and the right side of the pipeline respectively need operation space which is at least more than 500 mm.

2.8 welding, detecting and repairing the mouth

And starting welding operation from the middle part of the tunnel, and synchronously carrying out welding operation outwards by the two welding machine sets in a back-to-back mode until the whole pipeline is welded and other working procedure operations are completed.

2.9 pipe clamp installation

Before the pipeline installation in the tunnel, it is smooth to guarantee the tunnel bottom plate, need pour certain thickness concrete cushion in the tunnel bottom and satisfy the smooth requirement of tunnel bottom plate like the unevenness. Then, pre-burying a steel plate base of a stainless steel support on the tunnel bottom plate at an interval of 20 m.

The stainless steel support and the steel plate base are connected by welding or bolts. The pipeline is installed on a stainless steel support and fixed by a pipe clamp, as shown in fig. 9.

As shown in fig. 10, after the pipeline is completely welded and installed in place, hydraulic jacks (2 units 70T) with different strokes are adopted to jack the pipeline, so that the pipeline section is suspended and separated from the temporary pipe pier, the pipeline steel support is installed in place according to the design requirement, the temporary pipe pier is removed, then the inverted chain falls back at a constant speed until the steel pipe falls on the installed steel support, then the upper operation is repeated until the temporary pipe pier is completely removed, and the support is completely installed.

In summary, the beneficial effects of the embodiment of the present invention may include the following: the problems that only a semi-automatic welding process can be adopted in the tunnel crossing construction of the mountain section of the high-steel-grade and large-caliber long-distance pipeline at present, welding cracks are prone to occur, construction efficiency is low, construction period is long, and welding quality is low are solved, the full-process automatic welding operation of the tunnel crossing construction of the mountain section of the high-steel-grade and large-caliber long-distance pipeline is achieved, welding quality and construction efficiency are improved, and construction period is shortened.

The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims (12)

1. A method of installing a pipe in a tunnel, comprising:

acquiring relevant information of a tunnel, wherein the relevant information comprises curve and straight information, inclination angle information and width information;

determining the category corresponding to the tunnel according to the related information, wherein the category comprises a first tunnel category and a second tunnel category, the first tunnel category is a tunnel category without a slope change point and a turning point, the inclination angle is smaller than a preset inclination angle, and the width is smaller than a preset width threshold, the second tunnel category is a tunnel category with a slope change point and/or a turning point, and the width is larger than or equal to the preset width threshold, the slope change point is a position where the tunnel turns in the longitudinal direction, and the turning point is a position where the tunnel turns in the transverse direction;

determining a pipeline installation strategy corresponding to a tunnel type according to a pre-stored corresponding relation between the tunnel type and the pipeline installation strategy, wherein the pipeline installation strategy comprises welding in an automatic welding mode, the pipeline installation strategy comprises a first strategy corresponding to the first tunnel type and a second strategy corresponding to the second tunnel type, the first strategy adopts a tunnel external welding mode, and the second strategy adopts a tunnel internal welding mode;

and carrying out pipeline installation on the tunnel according to the pipeline installation strategy corresponding to the category.

2. The method according to claim 1, wherein the pipeline installation of the tunnel according to the pipeline installation strategy corresponding to the category comprises:

determining the pipeline installation strategy corresponding to the category as the first strategy;

the method comprises the following steps that a tunnel portal at one higher position in a tunnel is provided with a group welding platform and a first winch, and a tunnel portal at one lower position in the tunnel is provided with a second winch, wherein the inclination angle of the group welding platform is equal to that of the tunnel;

sequentially welding the pipe sections on the assembly welding platform in an automatic welding mode to obtain welded pipe sections;

and the welded pipe sections are conveyed into the tunnel through the cooperation of a transport vehicle and the first winch and the second winch so as to realize the pipeline installation in the tunnel.

3. The method of installing pipes inside a tunnel according to claim 2, wherein the transportation vehicles comprise rail cars, and rails are laid on the bottom of the tunnel.

4. The method of installing a pipe in a tunnel according to claim 2, wherein before the welded pipe section is transported into the tunnel by engaging the first hoist and the second hoist with a rail car, the method further comprises:

and carrying out at least one of welding seam detection, corrosion prevention joint coating and sand blasting rust removal on the welded pipe section.

5. The method of installing a pipe within a tunnel according to claim 1, wherein the preset inclination angle is 15 °.

6. The method of installing a pipe in a tunnel according to claim 2, wherein the length of the assembly welding platform is in the range of 28-75 m, the height of the assembly welding platform is not more than 6m, and the width of the assembly welding platform is in the range of 10-16 m.

7. The method of installing a pipe within a tunnel of claim 3, wherein the transporting the welded pipe section into the tunnel by a transport vehicle engaging the first hoist and the second hoist comprises:

and placing the welded pipe sections on the rail car, wherein one end of the rail car is connected with a steel wire rope of the first winch through a first pipe supporting head, the other end of the rail car is connected with a steel wire rope of the second winch through a second pipe supporting head, and the first winch and the second winch are started to drag the rail car into the tunnel along the rail.

8. The method for installing pipelines in a tunnel according to claim 1, wherein the step of installing pipelines in the tunnel according to the pipeline installation strategy corresponding to the category comprises the following steps:

determining the pipeline installation strategy corresponding to the category as the second strategy;

determining that the tunnel comprises a grade change point or a turning point;

arranging pipe inlet platforms at two ends of the tunnel respectively, wherein each pipe inlet platform comprises a winch, and a track is laid at the bottom of the tunnel;

conveying a steering joint into the tunnel from one end of the tunnel by matching a rail car with the winch until the steering joint reaches the position of the slope changing point or the turning point;

sequentially transporting pipe sections from both ends of the tunnel to both sides of the steering joint by the rail car;

and after the pipe sections completely reach the tunnel, welding the pipe sections in an automatic welding mode to realize the pipeline installation in the tunnel.

9. The method of installing a pipe inside a tunnel according to claim 8, wherein the ranges of the inclination angles of the sub-tunnels at both sides of the change point or the turning point of the tunnel include 0 to 28 ° and 0 to 15 °, respectively.

10. The method of installing pipes in a tunnel according to claim 8, wherein the step of sequentially transporting pipe segments from both ends of the tunnel to both sides of the knuckle by the railcar further comprises:

and arranging a temporary support below the pipe section to support the pipe section, and withdrawing the rail car before the next temporary support is installed until the pipe distribution of all the pipe sections is completed.

11. The method of installing a pipe within a tunnel according to claim 8, further comprising: and after the pipe sections are completely welded, arranging pipe supports at preset intervals in the tunnel to support the pipe.

12. The method of installing a pipe within a tunnel according to claim 11, wherein the predetermined distance is in a range including 15 to 25 m.

Images