JP5421805B2 - Suspension and pile bracket - Google Patents

Description

  The present invention relates to a hanging tool suspended from a tip portion of a crane, and a pile bracket that can be engaged and disengaged.

  Foundation work will be undertaken in order to support the wind turbine tower of the offshore wind power plant, etc. When placing a pile in this foundation work, a hanging tool suspended from the tip of the crane is connected to the pile and the pile is moved to the seabed or underground placement position. If the pile is detached from the hanger, there is a possibility of causing a serious accident, so the hanger needs to be firmly connected to the pile.

  Therefore, various inventions have been proposed in the past for firmly connecting the suspension tool to the pile. Examples of this type of invention include a connection cylinder fixed around the pile and a balance between the connection cylinder and the connection cylinder. A pile suspension device that has a plurality of fixed connection portions and connects a connection tool such as a wire or a hook to the connection portions to hold the pile in a suspended state (see Patent Document 1), Attach the ring to the end of the lifting wire, attach the ring attached to the end of the wire to the hole in the pair of brackets attached to the outer periphery of the upper end of the upper pile, and hang the wire on the crane hook. A steel pipe pile connection method for connecting the lower end portion of the upper pile to the upper end portion of the lower pile while hanging and holding the pile is known (see Patent Document 2).

Japanese Patent Laid-Open No. 11-190023 JP-A-8-158359

  However, in the conventional pile suspension device and the steel pipe pile connection method described above, not only the operation of attaching the crane suspension to the connection portion or the bracket, but also the removal operation is performed by the operator directly touching the suspension. In addition, it was necessary to remove the lifting tool, which was a work at a high place. Therefore, there is a problem that it takes time to remove the lifting tool, a problem that it is difficult to secure the safety of the work, and a problem that the temporary work for securing the scaffolding of the worker is necessary, which increases the construction cost. There was.

  The present invention has been made to solve the above-described problems, and the removal of the suspension is achieved by performing the removal work of the suspension only by operating the crane without the operator directly touching the suspension. An object of the present invention is to provide a hanging tool and a pile bracket capable of simplifying work and improving work safety and reducing the construction cost.

  In order to achieve the above-described object, the present invention is a hanging tool that is suspended from the tip of a crane, and includes two cross members provided at the top and bottom and a winch that is suspended at the center of the upper cross member. A winding wire that can be wound up by the winch, a lifting wire that branches from the lower end of the winding wire to both sides and hangs downward from the lower cross member, and is connected to the lower end of the lifting wire And a guide wire that is folded back below the elevating member, and winds up the hoisting wire with the winch. The elevating member rises along the guide wire, and a space surrounded by the elevating member and a lower portion of the guide wire is configured to expand.

  In the hoist according to the present invention, the lifting wire includes an upper lifting wire that connects the winding wire and both ends of the lower cross member, and both ends of the lower cross member. A lower elevating wire for connecting the elevating members, and the guide wire is connected to both ends of the upper cross member and may not be connected to the lower cross member.

  Further, in the hanging tool according to the present invention, the lifting wire is inserted through vertical holes formed at both end portions of the lower cross member, and the guide wire is connected between both end portions of the upper and lower cross members. An upper guide wire to be connected to each other, and a lower guide wire that is connected to both ends of the lower cross member and is suspended may be provided.

  Furthermore, in the hanger according to the present invention, a guide portion is formed at the end of the elevating member along the guide wire that extends downward through the vertical hole of the elevating member. preferable.

  The present invention also relates to a bracket for a pile in which the above-described hanging tool can be engaged and disengaged, and a protrusion protruding at a position facing the radial direction of the outer peripheral portion of the pile, and a hook-like shape at the tip of the protrusion It is characterized by having a collar part formed in the above.

  According to the present invention, it is possible to achieve various excellent effects such as simplification of the removal work of the lifting tool and improvement of work safety and reduction of construction cost. .

It is a top view which shows the temporary lead frame used in the monopile type foundation construction method which uses the hanging tool and bracket of a pile which concern on embodiment of this invention. It is a side view which shows one process of the monopile type foundation construction method which uses the hanging tool and bracket of a pile which concern on embodiment of this invention. It is a top view which shows the main lead frame used in the monopile type foundation construction method which uses the hanging tool and bracket of a pile which concern on embodiment of this invention. It is a side view which shows the following one process of the monopile type foundation construction method which uses the hanging tool and bracket of a pile which concern on embodiment of this invention. It is a side view which shows the further next process (building of a foundation pile, placement process) of a monopile type foundation construction method using the hanging tool and pile bracket which concern on embodiment of this invention. It is a front view which shows the pile which has the bracket of the pile which concerns on embodiment of this invention. It is a schematic diagram which shows the hanging tool which concerns on embodiment of this invention. It is a schematic diagram which shows the modification of the hanging tool which concerns on embodiment of this invention. It is a schematic diagram which shows the further modification of the hanging tool which concerns on embodiment of this invention. It is a side view which shows the following one process of the monopile type foundation construction method which uses the hanging tool and bracket of a pile which concern on embodiment of this invention. It is a side view which shows the following one process of the monopile type foundation construction method which uses the hanging tool and bracket of a pile which concern on embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Here, FIG. 1 is a plan view showing a temporary guide frame used in a monopile-type foundation construction method using the suspension tool and the pile bracket according to the embodiment of the present invention, and FIG. 2 is the suspension tool and the pile bracket. FIG. 3 is a plan view showing a main lead frame used in the monopile foundation construction method using the lifting device and the bracket of the pile, and FIG. FIG. 5 is a side view showing a further next step of the monopile foundation construction method using the lifting tool and the bracket of the pile, and FIG. 5 is a further next step of the monopile foundation construction method using the lifting tool and the bracket of the pile. FIG. 6 is a front view showing a pile having a pile bracket according to the embodiment of the present invention, and FIG. 7 is a suspension according to the embodiment of the present invention. Schematic diagram showing the tool FIG. 8 is a schematic view showing a modification of the suspension, FIG. 9 is a schematic view showing a further modification of the suspension, and FIG. 10 is a monopile using the suspension and a pile bracket according to the embodiment of the present invention. FIG. 11 is a side view showing a further next step of the monopile type foundation construction method using the lifting tool and the pile bracket. In addition, in the following description, the case where the monopile type foundation construction of an offshore wind power plant is constructed using the hanging tool and the pile bracket according to the embodiment of the present invention will be described as an example.

  First, as a preparatory work, the temporary guide frame 1 is assembled on land. As shown in FIG. 1, the temporary guide frame 1 is formed by joining an H steel 2 in a box shape. For example, the outer diameter is 8.0 m × 8.0 m × 8.0 m. It has a cubic shape. A rectangular parallelepiped foundation pile driving space 3 is formed in the center of the temporary guide frame 1, and rectangular parallelepiped guided pile placing spaces 4a, 4b, 4c, and 4d are formed at four corners around the foundation pile placing space 3, respectively. Is formed.

  Next, as shown in FIG. 2, the first crawler crane 5 (for example, 450 t) installed on the coastal land is used to lift the temporary guide frame 1 and install it at a predetermined position on the seabed in the coastal water area. At this time, if the sea bottom is not flat, level adjustment is performed so that the temporary guide frame 1 is in a horizontal posture with H steel or the like interposed between the sea bottom and the temporary guide frame 1.

  Then, using this temporary guide frame 1 as a guide, H steel (for example, H-300) is driven into the required location (for example, the black circled portion in FIG. 1) to investigate the obstacle, and then the first crawler. The crane 5 is used to install guide piles 6a, 6b, 6c, and 6d (for example, steel pipes with a diameter of 800 mm) in the guide pile placing spaces 4a, 4b, 4c, and 4d of the temporary guide frame 1, respectively. Lead piles 6a, 6b, 6c, 6d are driven.

  Next, using a second crawler crane 8 (for example, 750 t) installed on the coastal land, the temporary guide frame 1 is lifted and removed from the seabed. And as shown in FIG. 3, while extending the steel material 26 (for example, H-400) so that each upper part of each guiding pile placement space 4a, 4b, 4c, 4d of this temporary guiding frame 1 may be crossed, a foundation The temporary guide frame 1 is processed again into the main guide frame 9 by attaching the roller 27 to the upper part of the portion facing the pile placing space 3 and attaching the guide (not shown) to the lower part. Thereafter, as shown in FIG. 4, the second crawler crane 8 is used to lift the main guide frame 9, place each steel material 26 on the guide piles 6 a, 6 b, 6 c, 6 d, and a dedicated bracket for steadying Then, the guide piles 6a, 6b, 6c, 6d are fixed to the steel materials 26, and the main guide frame 9 is installed at a predetermined position on the seabed.

  Next, as shown in FIG. 5, using the second crawler crane 8, the foundation pile 10 (for example, a φ3500 mm steel pipe) is lifted and built in the foundation pile placing space 3 at the center of the main guide frame 9. .

  As shown in FIG. 6, a bracket 30 is fixed to the outer peripheral portion of the foundation pile 10 at a radially opposed position. The bracket 30 includes a cylindrical protrusion 31 and a protrusion 31. It is comprised by the circular plate-shaped collar part 32 formed in collar shape at the front-end | tip.

  Further, a hanging tool 40 is suspended from the tip of the second crawler crane 8 used at this time. As shown well in FIG. 7, the lifting tool 40 includes two cross members 41, 42 provided on the top and bottom, a winch 45 suspended from the center of the upper cross member 41, and a winch 45. A winding wire 46 that can be wound up, upper lifting wires 43 and 44 that branch from the lower end of the winding wire 46 to both sides and are connected to both ends of the lower cross member 42, and the lower cross member 42 Lower elevating wires 49 and 50 that are connected to both ends and hang downward from the lower cross member 42, and a pair of elevating members 51 and 52 connected to the lower ends of the lower elevating wires 49 and 50, The vertical holes 53, 54, 55, 56 formed at the ends of the elevating members 51, 52 are connected to both ends of the upper cross member 41 and not connected to the lower cross member 42. Insert and fold in a U-shape below the elevating members 51 and 52 It is constituted by a guide wire 57, 58 to be.

  Further, guide portions 59, 52 are provided at the ends of the elevating members 51, 52 along guide wires 57, 58 that extend downward through the vertical holes 53, 54, 55, 56 of the elevating members 51, 52. 60 is formed.

  FIG. 7 is a schematic diagram for easily showing the configuration of the hanging tool 40, and does not accurately show the appearance of the hanging tool 40. Actually, the lower cross member 42 in FIG. The guide wires 57 and 58 and the elevating members 51 and 52 shown below are arranged along a direction perpendicular to the arrangement direction of the upper and lower cross members 41 and 42 (that is, the direction perpendicular to the paper surface of FIG. 7). ing.

  When the suspension tool 40 having such a configuration is connected to the foundation pile 10, the operator manually operates on land, and the portions below the lifting members 51 and 52 of the guide wires 57 and 58 are projected from the projections of the brackets 30. After being hooked on 31, the elevating members 51 and 52 are lowered and tightened. At this time, since the collar portion 32 is formed at the tip of the protrusion 31, it is possible to prevent the guide wires 57 and 58 from being detached from the protrusion 31.

  On the other hand, when removing this lifting tool 40 from the foundation pile 10, the winch 45 is driven by remote operation, the winding wire 46 is wound up, the upper lifting wires 43 and 44, the lower cross member 42, and the lower lifting The elevating members 51 and 52 are lifted along the guide wires 57 and 58 through the wires 49 and 50, and the guide wires 57 and 58 are lifted and lowered from the outer diameter of the flange portion 32 provided on the outer peripheral portion of the foundation pile 10. The space S surrounded by the elevating members 51 and 52 and the lower portions of the guide wires 57 and 58 is expanded so that the length of the lower portion is longer than the members 51 and 52. Thereafter, when the operator of the second crawler crane 8 lowers the wire that hangs the hanger 40 with this crane 8 and slightly swings the tip end portion of the crane 8, the lower portions of the guide wires 57 and 58 are moved to both sides. It can be easily removed from the bracket 30. In this manner, the removal work of the suspension tool 40 from the bracket 30 can be performed only by operating the second crawler crane 8 without the operator directly touching the suspension tool 40 with his / her hand. The work can be simplified and the work safety can be improved, and the construction cost can be reduced.

  The lifting device 40 is not limited to the above-described configuration, and various modifications are possible. For example, as shown in FIG. 8, the upper lifting wires 43 and 44 and the lower lifting wire 49 in FIG. , 50 are connected to form one lifting wire 49 ′, 50 ′, and the lifting wires 49 ′, 50 ′ are inserted into the vertical holes 47, 48 formed at both ends of the lower cross member 42, respectively. The guide wires 57 and 58 shown in FIG. 7 are suspended by being connected to upper guide wires 62 and 63 for connecting both ends of the upper and lower cross members 41 and 42 to both ends of the lower cross member 42, respectively. It may be divided into lower guide wires 64 and 65. Further, in this case, as shown in FIG. 9, the ends 61 and 62 of the guide wires 64 and 65 may be fixed to the ends of the elevating members 51 and 52.

  Next, as shown in FIG. 10, using the second crawler crane 8, the yatco 14 is placed on the foundation pile 10, and the first hydraulic hammer 15 is placed on the yatco 14 to drive the foundation pile 10. To do. Thereafter, the main guide frame 9 is lifted and removed from the seabed, and the two guide piles 6a and 6b on the sea side are pulled out. At this time, the two land-side guide piles 6c and 6d are left without being pulled out because they are used as the basis of a management bridge (not shown) used for maintenance after the completion of the wind power plant. Furthermore, as shown in FIG. 11, using the second crawler crane 8, the joining pipe 17 is fitted on the upper end portion of the foundation pile 10 that has been placed.

  Thereafter, although not particularly illustrated, the first crawler crane 5 is used to connect the corridor bridge assembled on land to the foundation pile 10 and hang it between the land and the foundation pile 10. Then, a grout hose is piped on this walkway bridge, and grout (for example, underwater non-separable high-flow non-shrink mortar) mixed on land is filled in the gap between the joint pipe 17 and the foundation pile 10 and then on land. A concrete pump car is installed, and raw concrete is placed in the foundation pile 10 and the joint pipe 17 through the concrete pipe disposed on the corridor bridge. Finally, the anti-corrosion is performed on the foundation pile 10 and the two lead piles 6c and 6d on the land side to complete the construction of the monopile foundation.

  In the above-described embodiment, the case where the monopile foundation construction of the offshore wind power plant is constructed using the lifting tool 40 and the pile bracket 30 according to the present invention is described only as an example. The hanger 40 and the pile bracket 30 according to the present invention can also be applied to foundation work of other structures.

DESCRIPTION OF SYMBOLS 5 1st crawler crane 8 2nd crawler crane 10 Foundation pile 30 Bracket 31 Protrusion part 32 Ridge part 40 Lifting tool 41 Upper cross member 42 Lower cross member 43,44 Upper raising / lowering wire 45 Winch 46 Winding wire 47, 48 Vertical hole 49, 50 Lower lifting wire 49 ', 50' Lifting wire 51, 52 Lifting member 53-56 Vertical hole 57, 58 Guide wire 59, 60 Guide portion 62, 63 Upper guide wire 64, 65 Lower Guide wire S space

Claims (4)

A hanging tool suspended from the tip of the crane,
Two crosspieces provided at the top and bottom,
A winch suspended in the center of the upper cross member;
A winding wire that can be wound by the winch;
An elevating wire that branches from the lower end of the winding wire to both sides and hangs downward from the lower cross member;
A pair of lifting members connected to the lower end of the lifting wire;
A guide wire that is inserted through a vertical hole formed at an end of each of the elevating members and is folded under the elevating member;
With
When the hoisting wire is wound up by the winch, the elevating member rises along the guide wire, and a space surrounded by the elevating member and a lower portion of the guide wire is expanded. Characteristic hanging tool.   The elevating wire includes an upper elevating wire that connects the winding wire and both ends of the lower cross member, and a lower elevating member that connects the both ends of the lower cross member and the elevating members. The suspension tool according to claim 1, further comprising: a work wire, wherein the guide wire is connected to both ends of the upper cross member and is not connected to the lower cross member.   The elevating wire is inserted through vertical holes formed at both ends of the lower cross member, and the guide wire is connected to the upper guide wire that connects both ends of the upper and lower cross members. The suspension tool according to claim 1, further comprising a lower guide wire that is connected to both ends of the lateral member on the side and is suspended.   The guide part of any one of Claims 1-3 in which the guide part is formed in the edge part of the said raising / lowering member along the said guide wire which penetrates the vertical hole of the said raising / lowering member, and is extended below. The hanging tool described in 1.

Images