JP5210985B2 - Joining method and material for jacket structure and pile - Google Patents

Description

The present invention relates to a joining method and a joining material for a jacket structure and a pile that are installed in a water area to construct a structure.

When constructing a structure on water, it is common to use a jacket structure.
Here, as shown in FIG. 5, the jacket structure 1 is a three-dimensional steel pipe truss structure in which a group of vertically arranged exterior pipes a are joined by diagonal materials b and horizontal materials c.
The jacket structure 1 manufactured at the factory is coupled and fixed to a steel pipe foundation pile 2 installed on the seabed to construct the jacket structure 1.
On this jacket structure 1, another structure is constructed.
A method of joining the jacket structure 1 and the foundation pile 2 in that case is disclosed in Patent Document 1.

In this method, first, an anti-slip material is welded and attached in a circumferential direction at a position above the lower end of the outer tube that is a steel pipe of the jacket structure.
Then, the outer periphery of the foundation pile is surrounded by the wrapping sheet from a position above the anti-slip material, and the wrapping sheet is fastened and fixed from the outer periphery by a band at a position above the anti-slip material.
On the other hand, in the vicinity of the lower edge of the wound sheet, the outer periphery of the foundation pile is fixed by tightening the sheet from the outer periphery with a band.
In this way, the top of the sheet is fixed to the outer tube and the lower is fixed to the foundation pile, and in that state, the filler is filled between the outer insertion tube and the foundation pile.

JP-A-2005-256416.

The invention described in the patent document has the following problems.
<1> The wrapping sheet was attached to the outer intubation tube after the jacket structure was installed on the foundation pile, and then underwater by a diver.
<2> Therefore, it is difficult to adhere the surface adhesives at both ends of the wound sheet in the sea, and there is a possibility that leakage of the filled mortar occurs from a portion that is not completely bonded.
<3> The work of tightening the fixing band by the diving work in the sea is not easy, and its management is difficult.
<4> Since all the attaching work of the wrapping sheet is work in the sea by a diver, the diving time of the diver is long, and there is a problem in attachment accuracy and safety.
<5> The lower end of the jacket tube of the jacket structure and the wound sheet may be pinched or contacted. In that case, the sheet may be damaged and the mortar may leak.

In order to solve the above problems, the method for joining a jacket structure and a foundation pile according to the present invention is to join a jacket structure for constructing a structure in water to the head of the foundation pile installed on the bottom of the water. In this case, the outer tube constituting the legs of the jacket structure is joined to a foundation pile installed on the bottom of the water and having an outer diameter smaller than the inner diameter of the outer tube. At the upper position, an anti-slip material is attached in the circumferential direction. From the position above the anti-slip material, the outer periphery of the foundation pile is surrounded by a wrapping sheet. The outer periphery is fixed by tightening the winding sheet from the outer periphery with a fixing band, and in the vicinity of the lower edge of the winding sheet, the outer periphery of the foundation pile is loosely connected between the ends with a temporary fixing rope , Simply reciprocating the handle By squeezing the clamping tool that, wrapped and fixed by tightening the sheet from the periphery, the winding sheet and the jacket structure performed by filling the filling material into the enclosed space between the outer intubation the foundation pile and joining the foundation pile Features a method.

In addition, the joint member of the jacket structure and the foundation pile according to the present invention constitutes the legs of the jacket structure when joining the jacket structure for constructing the structure in water to the head of the foundation pile installed on the bottom of the water. This is a joining member used when fitting the extrapolation tube to the foundation pile installed on the bottom of the water and having an outer diameter smaller than the inner diameter of the extrapolation tube. When the wrapping sheet is attached to the outer periphery of the extrapolation tube, it is composed of a wrapping sheet that surrounds from the position above the anti-slip material attached in the direction to the outer periphery of the foundation pile. , A fixing band located above the anti-slip material , and a squeeze that is located in a position surrounding the outer periphery of the foundation pile in the vicinity of the lower edge of the wrapping sheet and is loosely connected between the ends with a temporary fixing rope Structure by wire The one in which was characterized by joining members of the jacket structure and the foundation pile.

Since the method for joining the jacket structure and pile and the joining material of the present invention are as described above, the following effects can be obtained.
<1> Since work such as attaching a wrapping sheet is performed on land, it is possible to perform a careful and highly accurate work.
<2> Safety is improved because the working hours of divers in the sea are significantly reduced.
<3> Since the accuracy of work such as attachment of a winding sheet is improved, leakage of mortar and the like does not occur.
<4> If a reinforcing cloth is attached to the inner side of the wound sheet, the possibility that the wound sheet hits the jacket or the foundation pile will be reduced.

Explanatory drawing of the Example of the material for joining which joins the jacket structure and pile of this invention. Explanatory drawing of the state which attached the winding sheet | seat to the outer tube of a jacket structure. Explanatory drawing of the Example of the extratubation tube which wound the winding sheet | seat. Explanatory drawing of the state which lowered | wrapped the winding sheet | seat and surrounded the circumference | surroundings of the pile. Explanatory drawing of the joining method of a general jacket structure and a pile.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

<1> Extratubation and foundation pile. (Fig. 5)
The jacket structure 1 is a three-dimensional steel pipe truss structure in which an extrapolation pipe 11 that is a vertical member made of a steel pipe is coupled with a diagonal member or a horizontal member.
On the other hand, the foundation pile 2 used as a foundation is configured by placing a steel pipe having an outer diameter smaller than the inner diameter of the outer insertion tube 11 on the bottom of the water.
And the extrapolation tube 11 which comprises the jacket structure 1 is fitted to the head of the foundation pile 2, the mortar is filled in the clearance gap between the outer insertion tube 11 and the foundation pile 2, and the jacket structure 1 and the foundation pile 2 is integrated.

<2> Anti-slip material. (Figure 1)
An anti-slip material 12 is attached to the outer periphery of the outer tube 11 at a position above the lower end so as to make a round in the circumferential direction.
The anti-slip material 12 can be used by welding a reinforcing bar, for example, but a material other than the reinforcing bar or a discontinuous material can also be used.
Since the anti-slip material 12 is attached to the outer periphery of the outer tube 11 in the circumferential direction, when the wound sheet 3 is attached to the outer tube 11, which will be described later, the wound sheet 3 slides down due to the weight of mortar or the like. Can be prevented.

<3> A wound sheet. (Figure 1)
The wound sheet 3 is a rectangular sheet in a developed state.
The wound sheet 3 can surround the range from the position above the anti-slip material 12 of the outer tube 11 of the jacket to the periphery of the foundation pile 2 in a cylindrical shape.
For example, a polyester sheet is used as the material.
A band-shaped surface adhesive 31 is attached to both edges of the rectangular shape of the wound sheet 3, that is, to the short sides of the rectangle.
The surface adhesive 31 is attached to the outer surface at one end of the wound sheet 3 and attached to the rear surface at the other end, so that when the wound sheet 3 is wound around the outer insertion tube 11 or the foundation pile 2, Can be easily glued.
Further, a winding belt 32 is attached to a plurality of locations on one edge of the winding sheet 3.
This is for winding up the winding sheet 3 before fitting the outer insertion tube 11 to the outer periphery of the foundation pile 2, as will be described later, and any material can be used if it is a string material. Further, a reinforcing cloth 37 can be attached to the inside of the wound sheet 3.

<4> Drawing wire.
On the outside of the rectangular wrapping sheet 3, a drawing wire 33 is attached over the entire length in parallel with the edge in the longitudinal direction at a position close to the edge in the longitudinal direction.
In order to prevent the squeezing wire 33 from falling off, the wire passage 33a is arranged at an appropriate position and penetrated through the wire passage 33a. Alternatively, a long bag-shaped drawn wire insertion bag may be attached to the outer surface of the wound sheet 3.
When the winding sheet 3 is formed in a cylindrical shape, the squeezing wire 33 may be rotated only once around the outer periphery thereof.

<5> Fixing band.
As described above, the drawing wire 33 is attached at a position near one edge of the wound sheet 3.
Further, a fixing band 34 is attached in parallel with the edge over the entire length of the wound sheet 3 at a position close to the other edge in the longitudinal direction.
The fixing band 34 is a wide and long strip made of steel in the embodiment shown in the figure, but is not limited to the material, and the winding sheet 3 is wound around the outer tube 11 and attached. Any material that can be used can be used.
In order to secure the position of the fixing band 34, a longitudinal insertion band 34 a that passes the belt is attached to the outer surface of the wound sheet 3.
When the fixing band 32 made of a thin steel plate is used, it can be fixed in a tightened state by winding the end with a dedicated tightening tool.

<6> Attaching the winding sheet.
The winding sheet 3 described above is attached to the outer periphery of the outer intubation tube 11 on land. (Figure 2)
For this purpose, first, the wrapping sheet 3 is wound around the outer periphery of the outer insertion tube 11 to above the anti-slip material 12 protruding from the outer insertion tube.
The attachment position of the wrapping sheet 3 is such that the fixing band 34 of the wrapping sheet 3 comes immediately above the anti-slip material 12.
At that time, if the upper cord 35 is temporarily fixed with the surface adhesive 31 and the upper cord 35 is disposed in parallel with the fixing band 34 at a position above the fixing band 34, the wound sheet 3 is temporarily attached with the upper cord 35. Fix it.
Thereafter, the fixing band 34 is tensioned and fixed with a dedicated tool, whereby the upper edge of the wound sheet 3 can be securely attached to the outer periphery of the outer tube 11 at a position above the anti-slip material 12.
A squeezing wire 33 is loosely wound around the skirt portion of the winding sheet 3 located on the outer periphery of the outer tube 11 in a cylindrical shape through a wire thread 33a.
The ends of the squeezing wire 33 are loosely connected with a temporary fixing rope 37.
Furthermore, the lower string 36 is passed through the skirt portion of the wound sheet 3 over the entire length. The lower string 36 functions as a slip stopper for the drawing wire 33 when the wound sheet 3 is attached to the foundation pile 2.

<7> Winding up the wound sheet.
In the above state, the wrapping sheet 3 is wound around the lower end of the outer insertion tube 11 in a tubular shape, and remains suspended in the tubular shape.
Therefore, there is a possibility that the wrapping sheet 3 is caught and broken when fitted to the foundation pile 2.
Therefore, the wound sheet 3 is once wound up and folded from below, that is, from the drawing wire 33 side.
Then, the wound sheet 3 folded in a bag shape is bound by a winding belt 32 attached to the upper edge thereof. (Figure 3)
As a result, the wound sheet 3 can be wound around the outer periphery of the outer tube 11 in a headband shape and fixed.
The above work is work on land.

<8> Installation of the jacket. (Figure 3)
Next, a method of surrounding the outer intubation tube 11 and the foundation pile 2 with the above-described winding sheet 3 will be described.
As described above, the foundation pile 2 is first installed on the bottom of the water.
Thereafter, the jacket structure 1 is suspended by a crane or the like, and the hollow outer insertion tube 11 constituting the jacket structure 1 is fitted to the head of the foundation pile 2 having an outer diameter smaller than the inner diameter of the outer insertion tube 11.
In that case, the winding sheet 3 folded in a band shape is fixed and attached to the position above the lower end of the outer tube 11 by a winding belt 32.

<9> Release of the wound sheet.
The restraint of the winding belt 32 is released in a state where the lower end of the outer insertion tube 11 is located on the outer periphery of the foundation pile 2.
Then, the wound sheet 3 naturally hangs down by the weight of the squeezing wire 33 and surrounds the periphery of the foundation pile 2 in a cylindrical shape.
In this state, the lower part of the winding sheet 3 is located in the sea.

<10> Winding of the sheet. (Fig. 4)
First, the lower string 36 is squeezed by a diver and is tightened from the outer periphery of the foundation pile 2 to function as a slip stopper for the squeezing wire 33.
Next, the squeezing wire 33 around the hem of the winding sheet 3 is tensioned, and the winding sheet is wound around the outer periphery of the foundation pile 2.
In that case, a commercially available fastening tool such as a chain block is interposed between both ends of the squeezing wire 33 loosely wound around the hem portion of the winding sheet 3, and the handle is reciprocated to tighten the squeezing wire 33. Then, the skirt portion of the winding sheet 3 is attached in a state in which the outer periphery of the foundation pile 2 is tightened.
Although this work is a work in the sea, since it is a simple work in which the tool handle is simply reciprocated, the work can be performed reliably even in the sea where it is polluted and has no visibility.

<10> Filler injection.
A part of the outer tube 11 is provided with a filling port 13 for the filler 5 such as cement milk.
A filler is injected from the filling port 13 and cured.
As a result, the jacket structure 1 and the foundation pile 2 are firmly integrated by filling the gap between the outer insertion tube 11 and the foundation pile 2 that is completely surrounded by the wrapping sheet 3 with the filler. Can do.

1: Jacket structure 11: Extrapolation tube 12: Non-slip material 2: Foundation pile 3: Winding sheet 31: Surface adhesive body 32: Winding belt 33: Drawing wire 34: Fixing band 35: Upper string 36: Lower string

Claims (4)

When joining the jacket structure for constructing the structure in the water to the head of the foundation pile installed on the bottom of the water,
It is a method of fitting and joining an outer tube constituting the legs of the jacket structure to a foundation pile installed on the bottom of the water and having an outer diameter smaller than the inner diameter of the outer tube,
At the position above the lower end of the extratubation tube, attach a non-slip material in the circumferential direction,
From the position above the non-slip material, surround the outer periphery of the foundation pile with a wrapping sheet,
At the position above the anti-slip material, the outer periphery of the outer cannula is fixed by fastening the winding sheet from the outer periphery with a fixing band,
Near the lower edge of the wrapping sheet,
The outer periphery of the foundation pile
A squeezing wire that is loosely connected between the ends with a temporary rope
By simply squeezing with a tightening tool that reciprocates the handle , the winding sheet is fixed from the outer periphery,
Fill the space surrounded by the wrapping sheet, extrapolation tube and foundation pile with filler.
Joining method for jacket structure and foundation pile. When joining the jacket structure for constructing the structure in the water to the head of the foundation pile installed on the bottom of the water,
A joint member used when the outer tube constituting the legs of the jacket structure is fitted to a foundation pile having a smaller outer diameter than the inner diameter of the outer tube, which is installed at the bottom of the water,
Constructed by a wrapping sheet that surrounds the outer periphery of the foundation pile from the position above the anti-slip material attached in the circumferential direction above the lower end of the extrapolation tube,
When the wrapping sheet is attached to the outer periphery of the outer tube,
A fixing band located above the anti-slip material in the vicinity of the upper edge of the wound sheet;
In the vicinity of the lower edge of the wound sheet, it is located at a position that surrounds the outer periphery of the foundation pile , and is constituted by a drawn wire that is loosely connected between the ends with a rope for temporary fixing ,
Joint member for jacket structure and foundation pile. In the middle position of the wound sheet,
Along the entire circumference of the wound sheet,
Install multiple sets of intermediate belts,
By tightening this intermediate belt,
It is characterized by shortening the interval of a part of the wound sheet,
The method for joining a jacket structure according to claim 1 and a foundation pile. In the middle position of the wound sheet,
Along the entire circumference of the wound sheet,
Install multiple sets of intermediate belts,
By tightening this intermediate belt,
It is characterized by shortening the interval of a part of the wound sheet,
The joint member of the jacket structure of Claim 2 and a foundation pile .

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