KR100540581B1 - The work device for weld under water and weld method to use it - Google Patents

Abstract

The present invention is a PC-House (PC HOUSE) is installed for the installation of piers during the construction of the offshore structure, after attaching the bracket to the steel pipe pile to support the PC-House, the operation for welding the bracket on the top By forming a sphere separately, simplifying the installation of the work zone, and thus the work period, required equipment and scale, the integrated work tool for dry welding of underwater welding, which improved the reliability and quality of the bracket through welding work, and the underwater welding dry work using the same It is about public law.

Offshore bridge, offshore bridge construction, offshore structure construction, temporary bridge

Description

Integrated work tool for dry work of underwater welding and the underwater welding dry work method using the same {The work device for weld under water and weld method to use it}

1 is a flow chart showing a dry welding operation in the water by the integrated work tool according to the present invention.

Figure 2 is a side view briefly illustrating a process of installing a piers or similar structures during the construction of marine (water) structures (year bridge, training bridge, etc.).

Figure 3 is a perspective view showing a work tool used for performing a dry welding operation underwater in the present invention.

4 is an exploded perspective view showing an upper work tool and a lower band for dry welding in water;

Figure 5 is a partially cutaway perspective view showing an upper work tool and workbench for dry welding in water.

Figure 6 is a side view showing the mounting of the upper work tool after the lower band assembly.

Figure 7 is a side view showing the welding of the bracket through the internal watering operation, after welding the bolts of the lower band and the upper work tool.

Figure 8 is a side view showing the lifting of the upper work tool and the lower band.

Figure 9 is a side view showing the installation of the PC-HOUSE (PC-HOUSE) in the structure installation position after the welding operation of the bracket in the method of the present invention.

10 is a side view showing a work tool for a dry welding operation using a tube capable of injecting air instead of the lower band in another embodiment of the present invention.

11 is a side view showing the air injection into the lower tube and the discharge of water (sea water, etc.) of the work tool after the work tool is mounted on the steel pipe pile for dry welding work.

12 is a side view showing the removal of air in the tube and the filling of water (sea water, etc.) inside the working tool after installing the bracket on the steel pipe pile by the dry welding operation.

<Explanation of symbols for the main parts of the drawings>

1. Work Tool 10. Work Table 11. Scaffolding

13. Vertical member 14. Circular member 20. Upper work tool

21. Upper jaw 22. Lower jaw 23. Hook

24. Reinforcement support 25. Vertical support 26. Mounting support

27. Vertical reinforcement 28. Horizontal reinforcement 29. Moving railing

31. Hook 32. Wire rope 40, 40 '. valve

50. Bottom band 51. Bottom rest 51a, 51b. Fixed piece

51c. Binding plate 51d. Bolt Insert 51e. ring

52. Bolts 53. Attachments 54. Supports

55. Watertight 56. Fixing Wedge 60. Bracket

61. Top plate 62. Louver 70. Work table

71. Rubber tube 72. Tube receiving part 73. Lower jaw

74. Fixed piece 75. Drain hole 76. Air inlet pipe

77. Drainpipe

The present invention relates to a method for installing bridge piers or similar structures during offshore (water) construction, and more specifically, PC-house (PC HOUSE) at the installation site for installing structures such as bridge piers on the sea. ) Is installed, and after attaching the bracket to the steel pipe pile to support the PC-House, and relates to the integrated work tool for dry work of underwater welding for welding the bracket on the upper portion and the underwater welding dry work method using the same.

Figure 2 is a simplified view showing a conventional bridge pier installation, the bridge pier is generally constructed at the construction site first to construct a steel pipe pile (P) on the floor, the PC-house (PC-HOUSE) 80 is seated After the concrete is poured into the seated PC house to form the foundation of the bridge, the bridge is formed on the upper portion 81.

At this time, in order to seat the PC house on the steel pipe pile, underwater welding of the PC house support bracket is performed on the upper side wall of the steel pipe.

In order to solve this problem, a temporary coating method using a dry caisson and a tube is performed. The dry caisson method using the dry caisson and tube is a dry steel caisson and tubing in close contact with the structure or the ground when repairing, reinforcing and new construction of the bridge's underwater structure (water well) to maintain the watertightness to dry damage parts It is a method of repairing, reinforcing, or establishing a new one.

Unlike the above method for dry welding and cutting work of the offshore steel pipe pile of the present invention, it is used for repairing and reinforcing the well exposed wall and for seismic reinforcing the bottom of the well. Over several months), many flat pants, cranes, high pressure pumps, generators, water pumps, etc. are difficult to install and are only used for large-scale temporary curtains.

In addition, the conventional method for installing the bracket of the offshore structure construction is a conventional method of welding in the water can not guarantee the quality and reliability of the welding work deterioration, and due to the difficulty of welding, The cost of construction rises. In addition, problems occurred in terms of safety management and environmental management.

The present invention simplifies the installation difficulties and working periods, the required equipment and the construction scale pointed out as a problem in the dry caisson and tube cladding method used for large-scale cladding, etc. It is an object of the present invention to provide an integrated work tool for dry work of underwater welding and underwater welding dry work method using the same to improve the reliability and quality of the bracket through welding work.

In the present invention, in the welding operation of the bracket (60) for supporting the PC-house (PC HOUSE) is installed when constructing the offshore structure, the upper work tool 20 is fixed to the steel pipe pile (P) is installed To install the lower band 50, coupled to the lower band 50 installed in the steel pipe pile (P) and the upper work tool 20 lifted by the crane, the lower band 50 and the upper work tool ( After completion of the assembly of the work tool by combining 20), the water in the work tool (1) to remove the water in the work tool 20, and after the water work, the bracket for mounting the PC-house ( 60), and after the welding operation, the operation of injecting water into the work tool for dismantling the work tool, and the work of dismantling and lifting the lower band 50 and the upper work tool 20 Underwater welding dry work method using the integrated work tool for dry work of underwater welding The upper jaw 21 and the lower jaw 22 formed in the upper part and the lower part, the engaging piece 23 provided in the upper jaw 21, and the reinforcing support member 24 installed in the lower part of the upper jaw as "+". ), A vertical support piece 25 attached to the tip of the reinforcing supporter 24 and the inside of the steel pipe pile, and a steel pipe mounting support mounted on the steel pipe pile at the bottom of the vertical support piece 25 is "+". Is attached, the vertical reinforcing bar 27 and the horizontal reinforcing bar 28, the moving railing 29 and the wire rope 32 is installed on the inner wall for the movement of the worker is connected to the inside of the upper work tool 20 An upper working tool 20, which is a connecting ring 51e, a valve 40 and a 40 'provided with a phase difference on the outside, and a footrest fixed to the upper jaw 21 of the upper working tool 20 ( 11) a workbench 10 formed of a vertical member 13 extending upwardly, an outer member 14 surrounding the outside of the vertical member 13, and a piece divided into two to three on the outer side of the footrest; The lower band 50 of the coupling is fixed to the coupling plate 51c at the front end of the piece is bolted to the outside to engage the lower support plate 51 and the lower jaw 22 to support the upper work tool 20 The curved "┓" ruler piece 51a is attached in the circumferential direction, and the lower jaw 22 is fitted to the fixing piece 51a to fix the fixing wedge 56, and the "┓" ruler piece 51a bent inwardly. ) Is attached in the circumferential direction to insert the watertight agent (55) to fix the fixing wedge with (56), the upper surface of the lower support plate to the wire rope 32 connected to the ring 31 of the upper work tool (20) The present invention relates to an integrated work tool for dry operation of underwater welding, characterized by comprising a ring 51e to be connected.

Hereinafter, with reference to the accompanying drawings "integral work tool for dry work of underwater welding and underwater welding dry working method using the same" according to the present invention will be described in detail as follows.

1 is a flow chart showing a dry working method using the integrated work tool (1) for dry operation of underwater welding according to the present invention, the work tool (1) is a work table 10, the upper work tool 20, the lower band It consists of 50. Since the integrated work tool is manufactured on land, precision manufacturing is possible, and it is possible to mount and dismantle in a short time (2 to 3 hours) by using a small barge and a crane.

The lower band 50 of the work tool 1 is installed on the steel pipe pile (P) driven on the bottom surface, and prevents water from entering the upper work tool 20, the inner side of the lower band 50 and the steel pipe As for the side wall of the pile P, the watertight agent 55 which can maintain the watertightness is fixed by the fixing wedge 56. As shown in FIG.

When the installation of the lower band 50 is completed, the upper work tool 20 equipped with a workbench is attached to the upper surface of the lower band 50, the upper work with a fixing wedge 56 for recycling of the work tool (1) The sphere 20 and the lower band 50 is combined.

Combined with the upper work tool 20 performs a water extraction to remove the water inside the work tool (1) blocked from the outside.

When the water discharge work in the working tool is completed, the bracket 60 supporting the PC house mounted on the steel pipe pile P is welded to the side wall of the steel pipe pile P in the circumferential direction. Before welding the bracket 60, the rust of the side wall of the steel pipe pile P is removed, and the bracket 60 supporting the vertical load of the PC house is welded. When the welding is completed, the contact area with the PC house 80 is completed. Attach the upper iron plate 61 to enlarge the, and then attach the louver (Rubber) (62) on the upper surface of the upper iron plate 61 to complete the bracket 60 welding operation.

Since the upper steel plate 61 is placed in the circumferential direction of the steel pipe pile, the inner circumference is formed to have an outer circumference of the steel pipe pile (P).

When the welding operation is completed, it is necessary to remove the work tool (1) installed for the dry welding of the bracket (60). Since the work tool 1 has different pressures on the outside and the inside, the valve 40 'provided at the outside of the upper work tool 20 is opened to alleviate the impact when the work tool is removed. ) Inflow.

When the inflow of sea water is completed, the fixing wedge 56 for fixing the upper work tool 20 and the lower band 50 is released, and after removing the bolt fixing the lower band 50, the upper work tool 20 is lifted. Underwater welding dry work method using the integrated work tool for dry work of underwater welding to complete the bracket 60 welding.

3 is a perspective view showing the operation (1) used for the dry welding operation, the work tool 1 is composed of the upper work tool 20 and the lower band 50 to which the work table 10 is attached.

The workbench 1 is provided with a scaffold 11 to provide a working space for the contractor and a guard rail to prevent the contractor from falling outside the work tool.

The scaffold 11 is fixed and attached to the upper jaw 21 of the upper work tool, and the outer side of the scaffold 11 has a vertical member 13 extending upward and a circular member 14 surrounding the outside of the vertical member 13. ) Is formed by the combination of

The upper work tool 20 is a hollow cylindrical tube, the upper and lower portions of the upper and lower sides of the upper jaw 21 and the lower jaw 22 are formed.

The upper jaw 21 is provided with a plurality of engaging pieces 23 for lifting the work tool 1, the reinforcing support 24 is attached to the "+" to increase the rigidity of the upper work table 20 At the end of the reinforcing supporter, a vertical support piece 25 is attached to prevent the reinforcing supporter 24 from sagging downward.

Steel pipe mounting support 26 is attached to the bottom of the vertical support piece 25 so that it can be mounted on the top of the steel pipe pile (P) with "+".

Inside the upper work tool 20, a plurality of vertical reinforcing bar 27 and horizontal reinforcing bar 28 is provided to reinforce the structure of the work table 1, and installs a handrail 29 for the contractor or worker to move. On the outside, valves (40, 40 ') for inflow of water (sea water, etc.) are provided separately. The valves 40 and 40 'are installed in the lower and middle of the upper workbench, and when the upper work tool 20 is installed, the lower valve 40 is opened to facilitate the inflow of water (sea water, etc.), and the upper work tool ( At the time of dismantling, the upper valve 40 'is opened to facilitate the inflow of water (sea water, etc.).

In addition, the fixing ring 31 is attached to the inner surface of the upper work tool 20, the hook 31e and the wire rope 32 attached to the lower support 51 of the lower band 50 of the ring 31. Connected.

The lower band 50 which is fastened by the lower jaw 22 and the fixing wedge 56 of the upper work table 20 is coupled to a plurality of pieces having the same shape and size to form a lower band 50.

The number of pieces is preferably 2 to 3 for the convenience of construction, the lower pedestal 51 for supporting the upper work table 20 and the "┓" ruler (51a) for coupling with the lower jaw 22 ( 51b) is circumferentially attached to the outer side and the inner side. At this time, the fixing piece 51a installed on the outside is bent to the outside, and the fixing piece 51b installed on the inside is bent to the inside, and the outer fixing piece 51a is fitted to the lower jaw of the upper work tool 20. , The gap between the lower jaw 22 and the fixing piece 51a is coupled to the fixing wedge 56. The inner fixing piece 51b fixes the gap between the watertight agent 55 and the fixing piece 51b so as to prevent the watertight agent 55 from being separated after the watertight agent is inserted.

And, the lower band 50 made of a plurality of pieces of the lower band 50 with bolts in the bolt insertion hole 51d formed in the coupling plate 51c extending upward for the coupling of the lower band 50 at the end thereof. To combine.

The inner side of the lower pedestal 51 is in close contact with the steel pipe pile (P) 53 extends vertically, downwards, the support 54 is the outer side of the close contact portion 53 and the lower portion of the lower pedestal 51 When attached to the steel pipe pile (P), after inserting the watertight agent (55) to the inner fixing piece (51b) combines a plurality of lower band pieces.

The plurality of lower band pieces consists of an integrated work tool 1 for dry operation of underwater welding as a lower band 50 for fastening the coupling plate 51c to which each lower band 50 abuts with a bolt.

The underwater welding dry working method using the integrated work tool (1) for the dry operation of the underwater welding is as follows.

6 to 9 is a side view of the underwater welding dry working method according to the present invention, the lower band 50 for installing the work tool (1) is installed on the steel pipe pile installed on the bottom surface.

The lower band 50 is connected in pieces divided into a plurality, each fastening the coupling plate (51c) abutting with a bolt.

After installing the lower band 50 on the steel pipe pile (P), the water-tight agent 55 is inserted into the inner fixing piece (51b) of the lower band 50, and then the fixing wedge (56) for fixing the correct position It prevents the separation of the watertight agent 55 is inserted.

When the installation of the lower band 50 is completed, the upper work tool 20, in which the actual dry welding operation is performed, is combined with the lower band 50.

The upper work tool 20, which is hooked to the upper work tool 20, the lifting piece 23 for lifting by a marine crane, is lifted by the lower band 50 and the lower support plate 51 first attached to the steel pipe pile P. After inserting the lower jaw 22 of the upper work tool 20 to the outer fixing piece (51a) formed in the fixing wedge 56 to fix the position of the upper work tool (20).

The steel pipe mounting support 26 formed in the upper work tool 20 is mounted on the steel pipe pile to prevent the safety accident that the upper work tool 20 falls to the lower part even when the work tool 1 is separated from the lower band 50. do. In addition, in order to fix the position of the work tool 1 with respect to the steel pipe pile P, a fixing plate 26a extending below the steel pipe mounting support 26 is closely attached to the steel pipe pile P at the lower portion of the steel pipe mounting support 26. To fix the position.

When combining the lower band 50 and the upper work tool 20, it is preferable to use a waterproofing agent made of waterproof silicone or rubber material to prevent the inflow of water (sea water, etc.) between the lower jaw 22 and the lower support 51. desirable.

When the installation of the upper work tool 20 is completed, after the draining work of water (sea water, etc.) inside the work tool is carried out, the welding work of the bracket 60 is performed.

The welding operation of the bracket 60 removes rust formed on the side wall of the steel pipe to which the bracket 60 is attached, and welds and fixes the bracket 60. The bracket 60 is formed on the side wall of the steel pipe pile (P) a plurality, the upper side of the bracket 60, the upper steel plate 61 is mounted in the circumferential direction of the steel pipe pile (P), after the PC house 80 On the upper surface of the upper plate 61 is placed a louver (rubber) (62) for preventing the inflow of water (sea water, etc.) is attached.

When the welding of the bracket 60 and the mounting of the upper steel plate 61 are completed, after removing the fixing wedge 56 of the inner fixing piece 51b of the lower band 50, the watertight agent 55 is removed, and Remove the fixing wedge 56 fitted in the lower jaw 22 of the work tool 20 and the outer fixing piece 51a of the lower band 50. After the fixing wedge 56 is removed, the upper work tool 20 is lifted upward by using a marine crane, and then the bolts fitted to the lower band 50, the coupling plate 51c are removed, and then the upper work tool ( When the 20 is lifted, the lower band 50 connected by the upper work tool 20 and the wire rope 32 is lifted together, and the bracket 60 attachment work is completed.

At this time, if the upper work tool 20 is suddenly removed, an impact is applied to the welding part, and thus, the valve 40 'provided on the side wall of the upper work tool 20 is opened before the upper work tool 20 is removed. ) Is introduced, the upper work tool 20 is preferably lifted.

9 is after mounting the PC house 80 to the installation position of the structure after the welding of the bracket 60, the concrete is poured into the PC house 80 to form a pier foundation, the bridge pier for the bridge construction on the top (81) 1 is a side view showing the installation.

10 to 12 is another embodiment of the present invention without installing the lower band to install a tube 71 provided separately in the lower portion of the upper work tool 20 'work tool (1') and water (sea water, etc.) Dry welding by blocking the inflow of the inlet, the lower part of the work tool extends under the lower jaw 73, and has a separate tube receiving portion (73a) to accommodate the rubber tube 71, and connected to the external air pump Air is injected or discharged to block the work tool 1 'from the outside, and water (sea water, etc.) formed in the lower part is formed, and discharge holes 75 are formed to adjust water (sea water, etc.) inside the work tool.

After lifting the work tool (1) for dry welding and mounting it on the steel pipe pile (P), the air is injected into the rubber tube (71) through the air inlet pipe (76) to open the outside and the work tool (1 '). Isolate from the outside.

When the injection of air to the rubber tube 71 is completed, after discharging water (sea water, etc.) inside the working tool to the outside with a water pump provided on the outside, the bracket 60 is welded.

After welding of the bracket 60, the air of the rubber tube 71 is removed and the work tool 1 'is lifted to complete the dry welding operation.

The present invention is to reduce the quality and reliability, which is a problem of underwater welding in the process of installing piers or similar structures during offshore structures (Yeon Bridge, Yukyang Bridge, etc.), and to increase the construction period and construction cost, safety management and environmental management. It is to prevent the problem, by using the integrated work tool provided separately, simplify the installation and the work period, the required equipment and the scale, improve the reliability and quality of the bracket through dry welding work and reduce the construction cost underwater It is effective to increase the safety of work by excluding the danger of welding.

Claims (3)

In welding the bracket 60 supporting the PC-House (PC HOUSE) installed when constructing the offshore structure, the lower part for fixing the upper work tool 20 to the steel pipe pile (P) where the PC-House is installed. Installation of the band 50; Combining the upper work tool 20 lifted by the crane with the lower band 50 installed on the steel pipe pile P; After the completion of the assembly of the work tool by combining the lower band 50 and the upper work tool 20, and watering operation in the work tool (1) to remove the water inside the work tool (20); After the flushing operation, welding operation of the bracket 60 for mounting of the PC-house; After the welding operation, injecting water into the working tool for dismantling the working tool; Underwater welding dry working method using the integrated work tool for dry work of underwater welding, characterized in that the lower band 50 and the upper work tool 20 is configured to dismantle, lift The integrated work tool 1 for dry working of underwater welding is according to claim 1, The upper jaw 21 and the lower jaw 22 formed at the upper and lower portions, the engaging piece 23 provided at the upper jaw 21, and the reinforcing support member 24 installed at the lower portion of the upper jaw as "+". ), A vertical support piece 25 attached to the tip of the reinforcing supporter 24 and the inside of the steel pipe pile, and a steel pipe mounting support mounted on the steel pipe pile at the bottom of the vertical support piece 25 is "+". Is attached, the vertical reinforcing bar 27 and the horizontal reinforcing bar 28, the moving railing 29 and the wire rope 32 is installed on the inner wall for the movement of the worker is connected to the inside of the upper work tool 20 An upper work tool 20 formed of a connecting ring 51e and valves 40 and 40 'installed out of phase with each other; The footrest 11 fixed to the upper jaw 21 of the upper work tool 20, a vertical member 13 extending upwardly to the outer side of the footrest, and an outer member 14 surrounding the outside of the vertical member 13 Working table 10; The lower band 50, which is divided into two or three pieces, has a lower plate 50 and a lower jaw 22 for fixing the coupling plate 51c with bolts and supporting the upper work tool 20 at the tip of the piece. "┓" shaped fixing piece 51a bent outward to engage with the circumferential direction, the lower jaw 22 is fixed to the fixing piece 51a to fix the fixing wedge 56, "The magnet fixing piece 51a is attached in the circumferential direction to insert the watertight agent 55, and then fix the fixing wedge with 56, and the upper surface of the lower support plate is connected to the hook 31 of the upper work tool 20. Integral tool for dry work of underwater welding, characterized in that consisting of a hook (51e) connected to the wire rope (32). In the work tool using a rubber tube in which the air inlet pipe 76 is connected to the outside for dry work on the outside of the marine structure, the work tool 20 'extends below the lower jaw 73 to separate the tube receiving portion 73a. A), a rubber tube (71) is inserted into the tube receiving portion (73a), and an integrated work tool for dry operation of underwater welding, characterized in that a water drain hole (75) is formed under the upper work tool.

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