CN115370171A - Construction method for in-situ suspension protection of power pipeline - Google Patents
Construction method for in-situ suspension protection of power pipeline Download PDFInfo
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- CN115370171A CN115370171A CN202210904775.6A CN202210904775A CN115370171A CN 115370171 A CN115370171 A CN 115370171A CN 202210904775 A CN202210904775 A CN 202210904775A CN 115370171 A CN115370171 A CN 115370171A
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- Prior art keywords
- truss
- steel
- pipeline
- fixedly connected
- steel plate
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/24—Safety or protective measures preventing damage to building parts or finishing work during construction
- E04G21/30—Safety or protective measures preventing damage to building parts or finishing work during construction against mechanical damage or dirt, e.g. guard covers of stairs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/60—Rope, cable, or chain winding mechanisms; Capstans adapted for special purposes
- B66D1/74—Capstans
- B66D1/7442—Capstans having a horizontal rotation axis
- B66D1/7447—Capstans having a horizontal rotation axis driven by motor only
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
- G08B21/182—Level alarms, e.g. alarms responsive to variables exceeding a threshold
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/06—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for laying cables, e.g. laying apparatus on vehicle
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Laying Of Electric Cables Or Lines Outside (AREA)
Abstract
The invention belongs to the technical field of rail engineering, and particularly relates to a construction method for in-situ suspension protection of a power pipeline, which comprises a truss and support columns, wherein the two sides of the bottom of the truss are fixedly connected with the support columns, the two sides of the top of the truss are fixedly provided with servo motors, the outer ends of transmission shafts of the servo motors are fixedly connected with winches, a steel plate is arranged right below the truss, the two sides of the top of the steel plate are fixedly provided with hanging rings, the outer wall of each winch is wound with a steel rope, the tail end of each steel rope penetrates through the truss and is fixedly connected with the corresponding hanging ring, the bottom of each steel plate is fixedly connected with a pressure sensor, and the bottom of each pressure sensor is fixedly connected with a bearing plate. According to the invention, the steel structure supporting columns are erected on two sides of the pipeline at the construction position, then the supporting columns are used for supporting the truss, so that the pipeline is supported by using the steel plates and then lifted in situ, and therefore, the in-situ protection is realized, the normal power transmission of the pipeline is not influenced, meanwhile, the construction period is short, the construction is convenient, and the method is more economical than the conventional power pipeline in terms of change.
Description
Technical Field
The invention relates to the technical field of rail engineering, in particular to a construction method for in-situ suspension protection of a power pipeline.
Background
The rail transit is a type of transportation means or transportation system in which an operating vehicle needs to travel on a specific rail, and the most typical rail transit is a railway system consisting of a traditional train and a standard railway.
Along with the continuous division of worker construction of underground track engineering, often meet open cut construction in the construction, cross conflict is obvious with present power pipeline in the work progress, the unable normal excavation construction in power pipeline below, the existing is through taking out the pipeline, then excavate, but the troublesome poeration, and the engineering is huge moreover to influence the power transmission of pipeline, thereby each side has all caused great trouble, for this reason, need design new technical scheme and give the solution.
Disclosure of Invention
The invention aims to provide a construction method for in-situ suspension protection of a power pipeline, which solves the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: the construction method for in-situ suspension protection of the power pipeline comprises a truss and support columns, wherein the support columns are fixedly connected to two sides of the bottom of the truss, servo motors are fixedly mounted on two sides of the top of the truss, winches are fixedly connected to the outer ends of transmission shafts of the servo motors, a steel plate is arranged right below the truss, lifting rings are fixedly mounted on two sides of the top of the steel plate, steel cables are wound on the outer wall of each winch, the tail ends of the steel cables penetrate through the truss and are fixedly connected with the corresponding lifting rings, the bottom of the steel plate is fixedly connected with a pressure sensor, the bottom of the pressure sensor is fixedly connected with a bearing plate, a controller and a wireless module are fixedly mounted on one side of the top of the truss, an alarm is fixedly mounted at one end of the truss, first fixing pieces are fixedly connected to two ends of the steel plate, first fixing buckles are fixedly mounted at the bottoms of the truss corresponding to the tail ends of the first fixing pieces, second fixing pieces are fixedly connected to two side walls of the bearing plate, and second fixing pieces are fixedly mounted at the bottoms of the truss corresponding to the second fixing pieces;
the construction method comprises the following steps:
the method comprises the following steps: firstly, planning and testing the actual position of a cable duct bank, manufacturing steel structure supporting columns on two sides of a pipeline, and enabling the supporting columns to be firmly fixed on the ground;
step two: the method comprises the following steps of building trusses on the tops of two supporting columns, fastening the trusses by using steel connecting pieces, enabling the supporting columns and the truss integral mechanism to be stable, fixing servo motors on two sides of the tops of the trusses, arranging a plurality of identical trusses and supporting columns on a construction road section, and meanwhile installing a controller, a wireless module and an alarm on the top of one truss;
step three: put into the loading board of steel sheet intercommunication steel sheet bottom in pipeline bottom and together arrange the pipeline below in, utilize steel cable and rings to connect, then utilize servo motor to the steel cable rolling to make the loading board drive the pipeline lifting, and utilize first mounting and first fixed knot to connect, second mounting and the fixed knot of second are connected simultaneously, thereby make the lifting pipeline protect, and can keep firm.
In a preferred embodiment of the present invention, the signal output terminal of the pressure sensor is connected to the signal input terminal of the controller, and the signal output terminal of the controller is connected to the signal input terminal of the alarm.
As a preferred embodiment of the present invention, the signal output terminal of the controller is connected to the signal input terminal of the external device through the wireless module.
As a preferred embodiment of the invention, the top of the steel plate is fixedly glued with a rubber pad with an adaptive anti-slip texture.
As a preferred embodiment of the invention, the tail end of the supporting column is fixed with a steel pile to improve the connection stability of the supporting column and the ground.
As a preferred embodiment of the present invention, the number of the hanging rings is four, and the four hanging rings are respectively located at four corners of the top of the steel plate.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the steel structure supporting columns are erected on two sides of the pipeline at the construction position, then the supporting columns are used for supporting the truss, so that the pipeline is supported by using the steel plates, and then the original position is lifted, so that the original position protection is realized, the normal power transmission of the pipeline is not influenced, meanwhile, the construction period is short, the construction is convenient, and the moving and changing economy is higher than that of the traditional power pipeline;
the controller synchronously controls a plurality of servo motors to synchronously wind the steel ropes so as to ensure synchronous lifting operation of a plurality of pipelines, thereby avoiding the condition of pipeline traction abrasion caused by inconsistent lifting and avoiding the condition of pipeline excessive breakage due to stretching;
pressure sensor through loading board top can monitor steel sheet bearing pipeline, thereby can be at the in-process of original position protection, monitoring pipeline and steel sheet whether have the risk of tenesmus, when the tenesmus appears, pressure sensor feeds back the pressure numerical value of controller and surpasss the threshold value, the controller can start the alarm and report to the police this moment, simultaneously timely give the staff with the signal feedback, make the staff very first time carry out professional processing, thereby avoid lasting the tenesmus and take place great dangerous condition easily, the pipeline has been effectually protected.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a schematic diagram of an in-situ suspension protection structure for an electrical power line according to the present invention;
fig. 2 is a system operation diagram of the construction method for in-situ suspension protection of the power pipeline.
In the figure: 1. a truss; 2. a support pillar; 3. a steel plate; 4. a pressure sensor; 5. a carrier plate; 6. a hoisting ring; 7. a servo motor; 8. a winch; 9. a steel cord; 10. a first fixing member; 11. a first fixing buckle; 12. two fixed parts; 13. a second fixing buckle; 14. a controller; 15. a wireless module; 16. an alarm; 17. and (4) external equipment.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, are used in the orientations and positional relationships indicated in the drawings, which are based on the orientations and positional relationships indicated in the drawings, and are used for convenience of description and simplicity of description, but do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can, for example, be fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. For those skilled in the art, the specific meaning of the above terms in the present invention can be understood in specific situations, the model of the electrical appliance provided in the present invention is only referred to, and different models of electrical appliances with the same function can be replaced according to the actual use situation.
Referring to fig. 1-2, the present invention provides a technical solution: the construction method for in-situ suspension protection of the power pipeline comprises a truss 1 and support columns 2, wherein the support columns 2 are fixedly connected to two sides of the bottom of the truss 1;
in the technical scheme, servo motors 7 are fixedly mounted on two sides of the top of a truss 1, the outer end of a transmission shaft of each servo motor 7 is fixedly connected with a winch 8, a steel plate 3 is arranged right below the truss 1, lifting rings 6 are fixedly mounted on two sides of the top of each steel plate 3, a steel rope 9 is wound on the outer wall of each winch 8, and the tail end of each steel rope 9 penetrates through the truss 1 and is fixedly connected with the corresponding lifting ring 6;
in the technical scheme, the winch 8 can be driven by the servo motor 7 to wind the steel rope 9, so that the steel plate 3 can be driven to be communicated with the pipeline to be lifted, and meanwhile, the servo motors 7 on the tops of the trusses 1 are synchronously operated, so that the pipeline can be lifted synchronously at multiple points, and the condition of traction damage is avoided;
in the technical scheme, two ends of a steel plate 3 are fixedly connected with a first fixing piece 10, the bottom of a truss 1 is fixedly provided with a first fixing buckle 11 corresponding to the tail end of the first fixing piece 10, two side walls of a bearing plate 5 are fixedly connected with second fixing pieces 12, and the bottom of the truss 1 is fixedly provided with a second fixing buckle 13 corresponding to the second fixing pieces 12;
in the technical scheme, the first fixing piece 10 is connected with the first fixing buckle 11, so that the steel plate 3 can be fixed at the bottom of the truss 1, and meanwhile, the second fixing piece 12 is connected with the second fixing buckle 13, so that the bearing plate 5 is stable and firm
In the technical scheme, the bottom of a steel plate 3 is fixedly connected with a pressure sensor 4, the bottom of the pressure sensor 4 is fixedly connected with a bearing plate 5, one side of the top of a truss 1 is fixedly provided with a controller 14 and a wireless module 15, one end of the truss 1 is fixedly provided with an alarm 16, a signal output end of the pressure sensor 4 is connected with a signal input end of the controller 14, a signal output end of the controller 14 is connected with a signal input end of the alarm 16, and a signal output end of the controller 14 is connected with a signal input end of an external device 17 through the wireless module 15;
in the technical scheme, the steel plate 3 bearing pipeline can be monitored through the pressure sensor 4, so that whether the pipeline and the steel plate 3 have a falling risk or not can be monitored in the original position protection process, when falling occurs, the pressure value fed back to the controller 14 by the pressure sensor 4 exceeds a threshold value, at the moment, the controller 14 can start the alarm 16 to give an alarm, and meanwhile, signals are fed back to the external equipment 17 of a worker in time, so that the worker can perform professional treatment at the first time, the situation that the continuous falling is easy to cause a large danger is avoided, and the pipeline is effectively protected;
the construction method comprises the following steps:
the method comprises the following steps: firstly, planning and testing the actual position of a cable duct bank, manufacturing steel structure supporting columns 2 on two sides of a pipeline, and enabling the supporting columns 2 to be fixed on the ground;
step two: the truss 1 is built on the tops of the two support columns 2 and fastened by using steel connecting pieces, so that the overall mechanism of the support columns 2 and the truss 1 is stable, the servo motors 7 are fixed on two sides of the top of the truss 1, a plurality of identical trusses 1 and support columns 2 are arranged on a construction road section, and a controller 14, a wireless module 15 and an alarm 16 are mounted on the top of one truss 1;
step three: putting into the loading board 5 that steel sheet 3 intercommunication steel sheet 3 bottom at the pipeline bottom and putting in the pipeline below together, utilizing steel cable 9 and rings 6 to connect, then utilizing servo motor 7 to the rolling of steel cable 9 to make loading board 5 drive the pipeline lifting, and utilize first mounting 10 and first fixed knot 11 to connect, second mounting 12 and the fixed knot 13 of second are connected simultaneously, thereby make the lifting pipeline protect, and can keep firm.
In an alternative embodiment, the top of the steel plate 3 is glued with a rubber pad with an adaptive anti-skid texture.
It should be noted that the rubber pad is arranged, so that the steel plate 3 can avoid the sliding condition when the pipeline is carried, the pipeline is protected, and the pipeline can be protected at intervals by using the protecting sleeve, so that the mutual abrasion is avoided.
In an alternative embodiment, the tail end of the supporting column 2 is fixed with a steel pile to improve the stability of the connection between the supporting column 2 and the ground.
It should be noted that the arrangement of the steel piles enables the degree of stability of the supporting column 2 to be significantly improved.
In an alternative embodiment, the number of the hanging rings 6 is four, and the four hanging rings 6 are respectively arranged at four corners of the top of the steel plate 3.
It should be noted that four lifting rings 6 are provided, so that the stability is high in the process of lifting and avoiding side turning.
In addition, the components included in the construction method for in-situ suspension protection of the power pipeline are all universal standard components or components known by technicians in the field, the structure and the principle of the construction method are known by technicians in the field through technical manuals or conventional experimental methods, all the electric devices in the device are connected with a power element, the electric devices, an adaptive monitoring computer and a power supply through leads at the idle position of the device, the specific connection means refers to the following working principle, the electric connection is completed between the electric devices in sequence, the detailed connection means is known in the field, the following main working principle and process are described, and the electric control is not explained.
While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present specification describes embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and it is to be understood that all embodiments may be combined as appropriate by one of ordinary skill in the art to form other embodiments as will be apparent to those of skill in the art from the description herein.
Claims (6)
1. The construction method for in-situ suspension protection of the power pipeline comprises a truss (1) and a support column (2), and is characterized in that: two sides of the bottom of the truss (1) are fixedly connected with supporting columns (2);
the steel plate steel truss structure is characterized in that servo motors (7) are fixedly mounted on two sides of the top of the truss (1), the outer end of a transmission shaft of each servo motor (7) is fixedly connected with a winch (8), a steel plate (3) is arranged under the truss (1), hanging rings (6) are fixedly mounted on two sides of the top of each steel plate (3), a steel rope (9) is wound on the outer wall of each winch (8), and the tail end of each steel rope (9) penetrates through the truss (1) and is fixedly connected with the corresponding hanging ring (6);
the bottom of the steel plate (3) is fixedly connected with a pressure sensor (4), and the bottom of the pressure sensor (4) is fixedly connected with a bearing plate (5);
a controller (14) and a wireless module (15) are fixedly installed on one side of the top of the truss (1), and an alarm (16) is fixedly installed at one end of the truss (1);
the two ends of the steel plate (3) are fixedly connected with first fixing pieces (10), the bottom of the truss (1) is fixedly provided with a first fixing buckle (11) corresponding to the tail end of the first fixing piece (10), the two side walls of the bearing plate (5) are fixedly connected with second fixing pieces (12), and the bottom of the truss (1) is fixedly provided with a second fixing buckle (13) corresponding to the second fixing piece (12);
the construction method comprises the following steps:
the method comprises the following steps: firstly, planning and testing the actual position of a cable duct bank, manufacturing steel structure supporting columns (2) on two sides of a pipeline, and enabling the supporting columns (2) to be stable on the ground;
step two: the truss (1) is built on the tops of the two supporting columns (2) and fastened by using steel connecting pieces, so that the supporting columns (2) and the truss (1) are stable in overall mechanism, servo motors (7) are fixed on two sides of the top of the truss (1), a plurality of identical trusses (1) and supporting columns (2) are arranged on a construction road section, and a controller (14), a wireless module (15) and an alarm (16) are arranged on the top of one truss (1);
step three: putting into steel sheet (3) intercommunication steel sheet (3) bottom at the pipeline bottom and putting in together pipeline below in, utilize steel cable (9) and rings (6) to connect, then utilize servo motor (7) to steel cable (9) rolling, thereby make loading board (5) drive the pipeline lifting, and utilize first mounting (10) and first fixed knot (11) to connect, second mounting (12) and second are fixed to detain (13) to connect simultaneously, thereby make the lifting pipeline protect, and can keep firm.
2. The construction method for in-situ suspension protection of the power pipeline according to claim 1, characterized in that: the signal output end of the pressure sensor (4) is connected with the signal input end of the controller (14), and the signal output end of the controller (14) is connected with the signal input end of the alarm (16).
3. The construction method for in-situ suspension protection of the power pipeline according to claim 1, characterized in that: and the signal output end of the controller (14) is connected with the signal input end of an external device (17) through a wireless module (15).
4. The construction method for in-situ suspension protection of the power pipeline according to claim 1, characterized in that: and the top of the steel plate (3) is fixedly glued with a rubber pad with an adaptive anti-skid pattern.
5. The construction method for in-situ suspension protection of the power pipeline according to claim 1, characterized in that: the tail end of the support column (2) is fixed with a steel pile, and the connection stability of the support column (2) and the ground is improved.
6. The construction method for in-situ suspension protection of the power pipeline according to claim 1, characterized in that: the number of the lifting rings (6) is four, and the four lifting rings (6) are respectively arranged at four corners of the top of the steel plate (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210904775.6A CN115370171B (en) | 2022-07-29 | 2022-07-29 | Construction method for in-situ suspension protection of electric power pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210904775.6A CN115370171B (en) | 2022-07-29 | 2022-07-29 | Construction method for in-situ suspension protection of electric power pipeline |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115370171A true CN115370171A (en) | 2022-11-22 |
| CN115370171B CN115370171B (en) | 2023-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210904775.6A Active CN115370171B (en) | 2022-07-29 | 2022-07-29 | Construction method for in-situ suspension protection of electric power pipeline |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115929399A (en) * | 2023-02-07 | 2023-04-07 | 中交四航局第一工程有限公司 | Construction protection device and construction protection method for electric power tunnel |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110578343A (en) * | 2019-09-26 | 2019-12-17 | 殷茜东 | Suspension protection structure and method for high-voltage power pipeline at top of deep foundation pit |
| CN113863367A (en) * | 2021-09-16 | 2021-12-31 | 中电建铁路建设投资集团有限公司 | In-situ protection suspension method for existing underground pipeline |
| US20220033234A1 (en) * | 2020-07-31 | 2022-02-03 | Bruce Creed | Truss lifter |
| CN215928643U (en) * | 2021-05-10 | 2022-03-01 | 中国建筑第六工程局有限公司 | Foundation ditch truss apron braced system convenient to below pipeline normal position protection |
-
2022
- 2022-07-29 CN CN202210904775.6A patent/CN115370171B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110578343A (en) * | 2019-09-26 | 2019-12-17 | 殷茜东 | Suspension protection structure and method for high-voltage power pipeline at top of deep foundation pit |
| US20220033234A1 (en) * | 2020-07-31 | 2022-02-03 | Bruce Creed | Truss lifter |
| CN215928643U (en) * | 2021-05-10 | 2022-03-01 | 中国建筑第六工程局有限公司 | Foundation ditch truss apron braced system convenient to below pipeline normal position protection |
| CN113863367A (en) * | 2021-09-16 | 2021-12-31 | 中电建铁路建设投资集团有限公司 | In-situ protection suspension method for existing underground pipeline |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115929399A (en) * | 2023-02-07 | 2023-04-07 | 中交四航局第一工程有限公司 | Construction protection device and construction protection method for electric power tunnel |
| CN115929399B (en) * | 2023-02-07 | 2024-01-23 | 中交四航局第一工程有限公司 | Construction protection device and construction protection method for electric power tunnel |
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| Publication number | Publication date |
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| CN115370171B (en) | 2023-06-30 |
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