JPS5851517B2 - Floating box joining method at sea - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a method for joining floating boxes at sea, and in particular, a method for joining two floating boxes together using a tension member made of steel wire, etc. At the same time, a jack is interposed between the thick-walled boxes, and, contrary to the action of the tension material, the jack applies force in the direction of widening the gap between the thick-walled boxes, thereby applying force in both directions. After correcting the position of the thick-walled box due to the balance and temporarily fixing their relative positions, a bonding material is filled between the thick-walled boxes, and the expansion force due to jacking is released, and the thick-walled box is strengthens the bond between

Generally, offshore structures are dry work t at docks.
After being constructed in this manner, the vessel is towed to a predetermined ocean location.

However, as the scale of the structure increases, the cost of constructing a dock to accommodate it increases, resulting in cost constraints. Since the structure is subjected to a significantly large vertical bending moment, the design cross section must be made thicker, which is disadvantageous in terms of stress.

Therefore, if the structure is divided into an appropriate number of units in advance and the individual divided units are joined together at sea,
The above problems are solved.

However, when joining floating bodies at sea, the sea conditions such as wave pressure, wind pressure, and tidal currents are even more severe than those on the seabed, so conventional techniques for joining submerged boxes underwater must be used as is. It cannot be applied.

Therefore, there has been a demand for the development of an offshore joining method that can overcome these harsh construction conditions and can be performed with high precision, high efficiency, and economically.

In particular, construction of offshore airports, offshore cities, offshore nuclear power plants, offshore plant bases, etc. is expected to occur in the near future, and construction methods for constructing such large offshore structures economically, easily, and quickly have been developed. The demand for this is increasing.

This inventor came up with this invention in view of such problems.

An object of the present invention is to provide a method for joining floating bodies at sea in which the effects of sea conditions such as wave pressure, wind pressure, and tidal currents are reduced as much as possible. It is an object of the present invention to provide a method for joining floating bodies at sea in which a series of joining processes can all be performed by dry work, and an object of the present invention is to provide a method for joining floating bodies at sea in which the joining can be performed firmly. A further object of the present invention is to provide a method for joining floating bodies at sea, which can be widely applied regardless of the material, shape, size, etc. of the floating body.

That is, the present invention provides a joint surface 3 of two floating boxes 1 and 2,
3 facing each other, the tension material 4 stretched between the boxes 1 and 2 on both banks is temporarily tensioned, and the joint surfaces 3 and 3 of the boxes 1 and 2 on both sides are interposed with an elastic water-stopping material 5. At the same time, a jack 6 extending in the anti-tensioning direction of the tension material 4 is interposed at an appropriate position between the thick-walled boxes 1 and 2, so that the tension force by the tension material 4 and the expansion by the jack 6 in the counter-tension direction are interposed. While balancing the opening force, the positions of the boxes 1 and 2 on both banks are corrected and their relative positions are temporarily fixed.
A specific invention provides a method for joining floating bodies at sea, which is characterized in that a binding material is filled between the spaces between the floating boxes and the binding material, and after the binding material has hardened, the spreading force by the jacks 6 is released and the tensioning material 4 is fully tensioned. At the same time, as a combined invention, the peripheral edges of the end faces of the floating boxes 1 and 2 are made to protrude, and the surface of this protruding part 7 is used as the joint surface 3, and the joint surfaces 3 and 3 of the two floating boxes 1 and 2 are provided. The tension material 4 stretched between the boxes 1 and 2 on both sides is temporarily tensioned, and the joint surfaces 3 and 3 of the boxes 1 and 2 on both sides are covered with an elastic water stop material 5.
At the same time, a hollow portion 8 partitioned by the overhang 1 is formed between the boxes 1 and 2 on both banks, and the inside of the elastic water stop material 5 in the boxes 1 and 2 on both banks is crimped. After draining the water, the hollow part 8 is used as a working room, and a jack 6 is installed at an appropriate position between the boxes 1 and 2 on both banks, and extends in the direction opposite to the tension of the tension material 4.
to correct the positions of the boxes 1 and 2 on both sides and temporarily fix their relative positions by balancing the tension force by the tension material 4 and the expansion force by the jacks 6 in the counter-tension direction, Next, a binding material is filled between the bonding surfaces 3 and 3 of the boxes 1 and 2 on both banks, and after the binding material hardens, the expansion force by the jack 6 is released and the tension material 4 is fully tensioned. The present invention provides a method for joining floating bodies at sea.

Next, the present invention will be explained according to illustrated embodiments.

Figure 1 shows the end face of the floating box 1, and Figure 2 shows the floating box 1,
2 is a vertical cross-sectional view in the joining direction of No. 2.

The floating boxes 1 and 2 here have their peripheral edges protruded at their end faces, and the surface of the protruding portion 7 serves as the joint surface 3.

A sheath hole 9 through which a steel wire serving as a tendon material 4 is inserted passes through both joint surfaces 3, 3 with a packing 10 around the surface thereof.

Furthermore, an elastic water-stopping material 5 made of a rubber gasket is attached to at least one of the joint surfaces 3, 3 of the both-bank boxes 1.2, and among the end surfaces of the both-bank boxes 1, 2, A watertight area 11 is attached to at least one of the sides,
The inside and outside of the floating box are connected.

According to this embodiment, the floating box 1 is provided with an elastic water-stopping material 5 and a watertight area 11.

Furthermore, fitting guides 12.1 are provided on the end faces of the boxes 1 and 2 on both banks.
3 is formed.

The fitting guide includes a concave fitting guide 12 and a convex fitting guide 13.
, both sides of the box 1 have a tapered surface.
, 2, the concave and convex portions are guided by the taper and fit together, thereby making it possible to position the joint break 3 on both sides of the boxes 1 and 2 in the plane direction.

In addition, the sheath holes 9 of the floating boxes 1 and 2 below the intake water level are provided with water stop plugs at the openings inside the floating boxes 1 and 2.

The floating bodies 1 and 2 are joined together on the ocean as shown in FIGS. 3 to 7.

First, the floating boxes 1 and 2 are floated on the ocean and towed to a predetermined position, their joining surfaces 3 and 3 are closely opposed to each other, and the anchor wire 14 is stretched with an appropriate margin. ，
2 at a predetermined position.

Next, a pulling wire 15 is stretched over the upper surface between the boxes 1 and 2 on both sides (FIG. 3).

The winch 1 installed on the deck of the boxes 1 and 2 on both banks
At step 6, the wire 15 is pulled up from its end and wound up, thereby drawing the floating box relatively toward each other (FIG. 4).

Furthermore, the wire 15 is gradually tensioned, and the fitting guide 12
, 13 are fitted together, thereby bringing together the joining surfaces 3, 3 via the elastic water stop material 5.

Then, the crimping force at the upper part I of the joint surfaces 3, 3 is applied to the wire 1.
5, and on the other hand, by injecting seawater into the ballast tank 17 provided inside the floating boxes 1 and 2 on the opposite side of the joint surfaces 3 and 3 of the floating boxes 1 and 2, a so-called hogging moment is created. The outer sides of the boxes 1 and 2 on both sides are lowered, and by repeating both steps, the joint surfaces 3 and 30 are aligned.

As a result, the boxes 1 and 2 on both sides are preliminary joined by compressing the elastic water stop material 5.

Instead of pouring water into the ballast tank 17, a weight may be placed on the deck.

Next, the tension material 4 is inserted into the opposing sheath holes 9 of the joint surfaces 3, 3, and stretched between the floating boxes 1, 2, and both ends of the tension material 40 are attached to the floating box 1. , 2 is connected to the jack (as shown in the figure).

It is advantageous to use a coated steel wire as the tension member 4 because it can prevent water from entering through the sheath hole 9 and corrosion due to seawater.

Then, while pulling the tension material 4 from both ends by the jerk, a constant tension is applied to tension the boxes 1 and 2 on both banks.

The steel wire used here is inserted through appropriately selected sheath holes 9 facing each other.

When the floating boxes 1 and 2 approach each other, the fitting guides 12 and 13, which are provided opposite to each other on the end surfaces thereof, come into contact with each other, and the taper of the unevenness is guided to the other side. Due to the fit, the mating surfaces 3.3 are brought into approximately normal position.

Then, the accumulated water contained in the hollow part 8 defined by the overhang part 1 is discharged (FIG. 5).

The hollow part 8 from which the accumulated water is discharged becomes a working chamber.

A worker then enters the work room through the watertight door 11 and sets jacks 6, which extend and retract in the directions of the boxes 1 and 2, at appropriate positions between the end faces of the boxes 1 and 2 on both sides.

The hollow portion 8 may be drained before the first tensioning between the boxes 1°2 on both sides by the tensioning material 4 is performed.

Furthermore, although four jacks 6 are used in this embodiment, the number may be increased or decreased.

Then, within the elastic limit of the elastic water stop material 5, the jacks 6 are extended to balance the tension force by the tension material 4 and the spreading force between the boxes 1 and 2 on both sides by the jacks 6. The positions of the shore boxes 1 and 2 are corrected, and their relative positions are fixed.

In this way, after temporarily fixing the boxes 1 and 2 on both banks, the joint surfaces 3,
3 is filled with mortar as a binding material, and after the mortar hardens, the spreading force by the jack 6 is released.

When filling with mortar, a rubber water stop material or inner formwork 18 is installed from the working chamber toward the space between the joint surfaces 3 and 3.

The expansion force is maintained by the jacks 6, because if the jacks 6 lack the capacity, the jacks 6 alone will not be sufficient to temporarily fix the boxes 1 and 2 on both banks. A steel material may be interposed between 1 and 2, and the reaction force may be transferred from the jack 6.

After the mortar hardens, when the expanding force by the jack 6 is released, the reaction force of the jack 6 is added to the tensioning force by the tendon material 4 that was applied between both joint surfaces 3 and 3 while the jack 6 was interposed. , the compressive force of the joint surfaces 3, 3 against the mortar as a binding material increases, and the joint between the floating boxes 1, 2 becomes strong.

If the tension material 4 that is tensioned between the boxes 1 and 2 on both sides is not inserted through the entire sheath hole 9, the tension material 4 is further inserted into the cases on both sides through the sheath hole 9 that has not been inserted yet. 1,2
I feel nervous in between.

This tensioning is done simultaneously with the release of the expansion force by the jack 6.

In this way, the boxes 1 and 2 on both banks are joined and fixed (FIG. 7).

Finally, the sheath hole 9 is grouted.

The floating boxes 1 and 2 shown in FIGS. 8 and 9 have a joint surface 3 formed on the surface of the peripheral protrusion 7 on the end face, as in FIGS. However, the overhanging portions 7 are provided on the outer periphery of the end face and at eight locations on the inner side thereof, and the joint surfaces 3 are formed on the surfaces of the overhanging portions 7 at eight inner locations.

An elastic water-stopping material 5 is attached to the outer projecting portion γ, and
A mortar packing 19 is attached to the outer periphery of the joint surface 3 of the inner projecting portion 7.

The other configurations are substantially the same as the floating boxes 1 and 2 of FIGS. 1 and 2.

Furthermore, the floating boxes 1 and 2 shown in FIGS. 10 and 11 are not provided with the above-mentioned protruding parts, and the entire end surfaces thereof serve as the joint surfaces 3, 3.

Therefore, since no hollow portion 8 is formed between the thick-walled boxes 1 and 2, the jack 6 must be operated within one of the floating boxes.

Therefore, since it is not suitable to use a known jack as the jack 6, a jack for tensioning the tendon material 4 is used here.

This jack 6 is shown in cross section in FIG.

That is, the jack 6 consists of a rotating rod 20 and a nut 21.

The rotating rod 20 has a screw 22 carved around it, a contact portion 23 for contacting the other floating box 2 at the tip, and a rotation operating portion 24 at the base end, so that the end surface of the floating box 1 It is penetrated into the wall that forms the.

Further, the nut 21 is fixed to a wall forming the end face of the floating box 1, and is screwed into the screw 22 of the rotating rod 20.

The rotation operating portion 24 of the rotary rod 20 has a rectangular cross section and is configured to rotate and hang the rotary rod 20 using a spanner or the like.

25 is a casing pipe, and 26 is a flange of the pipe 25.

In addition, the contact portion 23 here consists of a cap 27 with a spherical head attached to the tip of the rotating rod 20.
A steel plate 28 is attached to the side of the floating box 2 that comes into contact with the floating box 2 .

Therefore, this jack 6 can be operated from inside the floating box 1.
This is done by rotating the rotation operating section 24.

As is clear from the above, according to the present invention, when two floating boxes are joined via an elastic water-stopping material, the tension between the thick boxes due to the tension material and the reaction in the opposite direction are reduced. In order to balance the expansion force of the boxes on both banks due to the jacks extending in the tension direction, the boxes on both banks are securely fixed while reducing the influence of sea conditions as much as possible.

In other words, if only the tension between the thick-walled boxes is caused by the tension material, since there is an elastic water-stopping material between them, the water-stopping material of the boxes on both banks will be elastically deformed due to the influence of waves, etc. , allowing relative rocking.

Therefore, the area between the joint surfaces of the boxes on both sides will expand and contract repeatedly, so the binding material filled there will be
The bonding ability is inevitably reduced.

However, according to this invention, the space between the joint surfaces of the boxes on both banks can be secured by jacking, and the expansion and contraction can be prevented, so that the binding material filled between the joint surfaces is reliably hardened and Join the boxes.

Furthermore, after curing, the expansion force of the jack is released, so
The tension of the tendon is increased between the joint surfaces, and the joint of the thick-walled bodies is strengthened.

In addition, according to this invention, all of the process of joining floating boxes can be carried out by dry work, which ensures safety and ease of work, and can be applied to a wide variety of floating boxes regardless of their material, shape, size, etc. This effect can be applied to the joining of floating boxes.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a side view showing an example of the end face of a floating box, FIG. 2 is a front sectional view showing a joined state of the floating box, and FIGS. Figure 7 shows the process of joining the floating boxes. Figure 3A is a plan view of the floating boxes with their joining surfaces facing each other closely, Figure B is a plan view of A, and Figure 4 is the , Fig. 5 is a front sectional view showing a state in which the boxes on both banks are pulled together by a pulling wire, and Fig. 5 is a front sectional view showing a state in which a hogging moment is applied to the drawn boxes on both sides to join the joint surfaces. Figure 6 is a front cross-sectional view showing a state in which the thick-walled boxes are tensioned by a tension material and an expansion force is applied by jacks; Figure 7 is a front cross-sectional view showing a state in which the floating boxes have been joined; Fig. 8 is a side view showing another example of the end face of the floating box, Fig. 9 is a front sectional view showing the joined state of the floating box in Fig. 8, and Fig. 10 is a side view showing another example of the end face of the floating box. 11 is a front sectional view showing a joined state of the floating box shown in FIG. 10, and FIG. 12 is an enlarged sectional view of the jack used in FIG. 10. In addition, in the figure, 1 and 2 are floating boxes, 3 is a joint surface, 4 is a tension material,
5 is an elastic water-stopping material, 6 is a jack, 7 is an overhanging portion, 8 is a hollow portion, 20 is a rotating rod, 21 is a nut, 22 is a screw, 23 is a contact portion, and 24 is a rotation operating portion.

Claims (1)

[Claims] The joint surfaces of the 12 floating boxes are made to face each other, and the tension material stretched between the thick boxes is temporarily tensioned, and the joint surfaces of the thick boxes are interposed with an elastic water-stopping material. At the same time, a jack extending in the direction opposite to the tension of the tension material is interposed at an appropriate position between the thick boxes to balance the tension force due to the tension material and the expansion force due to the jack in the counter tension direction. Then, the position of the thick-walled box is corrected and its relative position is temporarily fixed, and then a bonding material is filled between the joint surfaces of the thick-walled box, and after the bonding material hardens, the expansion force due to the jacking is 1. A method for joining floating boxes at sea, characterized by releasing the tension members and fully tensioning the tension members. 2 A penetrating label and a screw are carved around the wall forming the end face of one of the floating boxes, and an abutting part for the other floating box is formed at the tip, and a rotation operating part is provided at the base end. A jack consisting of a rotary rod, which is attached to the wall, and a nut which is integrally formed with the wall or is fixed to the wall and is screwed into the screw of the rotary rod, is operated by rotating the rotary rod inside one of the floating boxes. Claim 1 characterized in that
Method for joining floating bodies at sea as described in Section 1. 3. Extend the peripheral edge of the end face of the floating box, use the surface of this overhang as the joint surface, make the joint surfaces of the two floating boxes face each other, and temporarily tension the tension material stretched between the thick boxes. Then, the joining surfaces of the thick-walled boxes are crimped to each other with an elastic water-stopping material interposed therebetween, and a hollow section defined by the overhang is formed between the thick-walled boxes. Water is drained from the inside of the elastic water-stopping material, the hollow part is used as a working chamber, and a jack extending in the direction opposite to the tension of the tension material is interposed at an appropriate position between the thick boxes to prevent tension by the tension material. By balancing the force and the expansion force due to jerking in the anti-tension direction, the position of the thick-walled box is corrected and its relative position is temporarily fixed.
Next, a bonding material is filled between the joint surfaces of the thick-walled box, and after the bonding material hardens, the expansion force caused by the jacking is released and the tensioning material is fully tensioned. Method. 4. A method for joining floating boxes at sea according to claim 3, characterized in that a known jack is installed between the thick-walled boxes in a working room, and the jacking operation is carried out in the working room.