JP4258792B2 - Catamaran cruise support device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a catamaran caisson rounding support device used when a caisson used for construction of a harbor structure such as a breakwater, a pier, a seawall, etc. is towed from a manufacturing site to an installation site.
[0002]
[Prior art]
Conventionally, caisson used to construct harbor structures such as breakwaters, piers, revetments, etc. are manufactured on land caisson production yards or floating docks called floating docks.・ Installed.
[0003]
At the time of this rounding, in the case of a vertically long caisson or the like, the stability is poor, and on the contrary, if a large amount of ballast or the like is added for stability, the draft is lowered and it is difficult to make a safe rounding.
[0004]
In addition, depending on the sea weather conditions of the rounding route, the rounding operation is restricted due to the waves, which affects the construction process of the port structure and delays the construction period. In particular, it is often affected by weather conditions when it is necessary to sail away from the caisson production yard, such as port construction on a remote island.
[0005]
In such a case, a method is generally used in which a crane ship is used and the caisson is lifted and the influence of waves is reduced.
[0006]
[Problems to be solved by the invention]
However, the use of a crane ship is very expensive and has problems with voyage safety, and is not suitable for long-distance round trips.
[0007]
SUMMARY OF THE INVENTION The present invention has been made in view of such a conventional problem, and an object of the present invention is to provide a twin-bottle caisson cruise support device that can safely and inexpensively navigate even when some marine weather conditions are poor.
[0008]
[Means for Solving the Problems]
In order to solve the conventional problems as described above and achieve the intended object, the feature of the invention described in claim 1 is that a pair of buoyancy bodies having a space where an upper part of a caisson can be inserted, and the buoyancy body A connecting beam that connects between the buoyant bodies, a fender that can be expanded and contracted by air pressure, and a buoyant body spacing regulating member that regulates the spacing between the buoyant bodies, The connecting beam is formed in a gate shape with a vertical member raised upward from each buoyant body and a horizontal member connecting the vertical members, and a caisson hanging means is provided on the horizontal member of the connecting beam, insert the upper part of the caisson between the buoyant body, so as to sandwich the caisson between the two fenders in a state of suspended by the suspension means, the plane of the caisson in which the two buoyant body is trying to help rounding Formed approximately the same length as before and after the caisson It is each to outer side buoyancy space restricting member to the catamaran type caisson Tow support apparatus comprising installed.
[0009]
The invention according to claim 2 is characterized in that, in addition to the structure of claim 1, the lower end of the caisson suspension means is attached to the upper end of the caisson, and the suspension bar material embedded in the caisson so that the upper end protrudes from the upper surface of the caisson. The suspension bar horizontal movement blocking means for blocking the horizontal movement relative to the caisson on the upper end side of the hanging bar material is provided, and the hanging bar material horizontal movement blocking means is connected to the upper end of the hanging bar material. A connecting bracket is provided, and a tensile force is applied to the hanger bar by pushing up the hanger in a direction away from the upper surface of the caisson with a bolt, and the horizontal movement of the hanger bar is prevented by the reaction force of the tensile force. It is to have done.
[1000]
According to a third aspect of the present invention, in addition to the structure of the first aspect, the lower end of the caisson suspension means is attached to the upper end of the caisson and the upper end of the caisson is protruded from the upper surface of the caisson. The suspension bar horizontal movement blocking means is arranged to prevent the horizontal movement relative to the caisson on the upper end side of the hanging bar material, and the hanging bar material horizontal movement blocking means has the hanging bar material inserted in the center. Protecting the shingle by having a shingle protection metal fitting whose bottom surface extends widely around the suspender material, and interposing a friction material such as hard rubber between the bottom surface of the shingle protection metal fitting and the upper surface of the caisson. The suspension bar material and the caisson suspension means are connected to the metal fitting, and the bottom surface of the protective metal fitting is pressed against the upper surface of the caisson by the rotational moment generated in the suspension reinforcement material by a horizontal load. In that so as to prevent.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of a catamaran caisson turning support apparatus according to the present invention will be described with reference to the drawings.
[0012]
In the figure, reference numeral 1 denotes a caisson rounding support device, and 2 denotes a caisson that intends to support rounding.
[0013]
The caisson cruise assisting apparatus 1 includes a pair of buoyancy bodies 3 and 3 arranged at an interval at which the upper part of the caisson 2 can be inserted, a connecting beam 4 connecting the buoyancy bodies 3 and 3, and both buoyancy bodies 3 and 3. Are provided with fenders 5 and 5 that can be expanded and contracted by air pressure, and buoyancy body spacing regulating members 6a and 6b that regulate the spacing between both buoyancy bodies 3 and 3, respectively.
[0014]
The buoyancy body 3 is formed in the shape of a hollow rectangular parallelepiped, and the length in the longitudinal direction is the plane length of the caisson 2, that is, the horizontal length of the surface of the caisson 2 that is to be held by the buoyancy bodies 3 and 3. The length is almost the same. Moreover, in the hollow part 7 of the buoyancy body 3, water can be taken in and out by the pouring / draining device 7a, and thereby the buoyancy of the buoyancy body 3 can be adjusted. That is, by adjusting the buoyancy of the buoyancy body 3, it is possible to adjust the draft of the entire cruise assistance device 1.
[0015]
The pouring / draining device 7a includes a pump 7b and pouring / draining pipes 7c, 7c. The pouring / draining pipe 7c communicates with the hollow portion 7 of the buoyant body 3, and the other pouring / draining pipe 7c is provided inside the caisson. Communicate with. By being configured in this way, the pouring / draining control inside the buoyancy body 3 can be performed, and the pouring / draining control inside the caisson can also be performed.
[0016]
Further, a plurality of fenders 5, 5... Are provided on the opposing surfaces of the buoyancy bodies 3, 3, that is, the inner side surface 3 a of the buoyancy body 3, and this fender 5 supplies and discharges air. By doing so, its width can be expanded and contracted.
[0017]
The connecting beam 4 includes vertical members 8 and 8 raised upward from both buoyancy bodies 3 and 3 and a horizontal member 9 connecting the vertical members 8 and 8. The gate member is configured with the transverse member 9.
[0018]
The vertical member 8 is provided with a plurality of vertical steel members 10, 10... Fixed at the lower end to the buoyant body 3 at right angles to the buoyant body 3 at a predetermined interval, and a horizontal steel member between the vertical steel members 10 and 10. 11, 11... Are bridged at predetermined intervals, and steel members 12 and 12 are diagonally bridged at four corners of a quadrangle formed by the vertical member 10 and the horizontal steel member 11 to form a truss structure, and the entire vertical member 8 is rigid. It is formed to become.
[0019]
The transverse member 9 has long steel members 13, 13... That are long in the same direction as the longitudinal direction of the buoyancy body 3 arranged at a predetermined interval, and the connecting steel members 14, 14. The steel members 15 and 15 are bridged diagonally at the four corners of the quadrangle formed by the longitudinal steel member 13 and the connecting steel member 14 to form a truss structure, and the entire horizontal member 9 is formed as a rigid body. In addition, a deck portion 16 is provided in the central portion of the upper surface of the transverse member 9, and the deck portion 16 is provided with a generator 17 for supplying electric power for driving each driving device or a mooring support device. Used winches 18, 18... Are used.
[0020]
Further, the transverse member 9 is provided with a suspending means comprising a chain 19 for suspending the caisson 2, and the lower end thereof is connected to a suspending material 20 embedded in the caisson 2 via a connector 21. As a result, the caisson 2 is suspended and supported by the transverse member 9.
[0021]
Buoyant body interval regulating members 6a and 6b are respectively hung on the lower ends of the front and rear end portions of the connecting beam 4, and the buoyant body interval regulating members 6a on the rear end side are rear end portions of both longitudinal members 8 and 8. The ends of the steel material 24 are fixed to the lower ends, respectively, so that the distance between the buoyant bodies 3 and 3 is not fluctuated, and the buoyant body interval restricting material 6b on the front end side is A receiving portion 26 is provided at the lower end of the front end portion, and a band steel plate 25 is spanned over the connecting portion 26a so that the position of the connection pin 26a of the receiving portion 26 can be adjusted. The interval is not changed.
[0022]
By configuring in this way, the caisson cruise assisting apparatus 1 holds the caisson 2 with the pair of buoyant bodies 3 and 3 via the fenders 5 and 5, and has the chain 19 with the lateral member 9 of the connecting beam 4. With the caisson 2 suspended, it can be crushed by dredgers.
[0023]
Next, a method for turning the caisson 2 using the above-described caisson turning support device 1 will be described.
[0024]
First, as shown in FIG. 5 (A), the caisson 2 made of a production yard or a floating dog is launched and brought upright in a stable state by water injection.
[0025]
Next, as shown in FIG. 5B, the caisson turning support apparatus 1 is moved so that the caisson 2 is sandwiched between the buoyancy bodies 3 and 3. At this time, the caisson turning support device 1 is moved so that the caisson 2 is sandwiched between the buoyancy body interval regulating members 6a and 6b.
[0026]
When the caisson turning support apparatus 1 moves to a predetermined position, water is poured into the buoyancy bodies 3 and 3 to lower the draft, and the caisson turning support apparatus 1 is lowered relative to the caisson 2.
[0027]
When the caisson turning support device 1 is lowered to a predetermined position, a chain 19 suspended from the transverse member 9 of the connecting beam 4 is projected from the upper surface of the caisson 2 as shown in FIG. The caisson 2 is held between the buoyant bodies 3 and 3 by being connected to the suspending bar material 20 and the buoyant body spacing regulating member 6b and by injecting compressed air into the fender and expanding it.
[0028]
And as shown in FIG.5 (D), while the caisson rounding assistance apparatus 1 and the caisson 2 are united, water is discharged from the buoyancy body 3, and the water in a caisson is poured by the pouring / draining device 7a. In a state where the balance is adjusted so that it is suitable for towing, it is towed by a tugboat or the like.
[0029]
When the caisson 2 is installed, the operations described above are performed in the reverse order.
[0030]
First, water is poured into the buoyancy body 3 and the caisson 2 by the pouring / drainage device 7a, and the draft is lowered to the caisson settling position in a state where the navigation support device 1 and the caisson 2 are integrated, and the caisson 2 is set down. Then, the air in the fenders 5 and 5 is evacuated, and the buoyancy body interval regulating member 6b and the chain 19 are removed.
[0031]
And the water in the buoyancy bodies 3 and 3 is discharged | emitted, the draft of the navigation assistance apparatus 1 is raised, the navigation assistance apparatus 1 is moved in the state, and the installation (sinking) work of the caisson 2 is completed.
[0032]
In the above-described embodiment, the case where the buoyancy body has a rectangular parallelepiped shape has been described. However, as long as sufficient buoyancy and the draft position can be adjusted, other shapes such as a columnar shape may be used regardless of the rectangular parallelepiped shape. In addition, in the above-described embodiment, the case where only the front buoyancy body interval regulating member 6 is adjustable in length has been described, but a structure in which the length can be adjusted in both the front and rear is also possible.
[0033]
In addition, when the caisson 2 is supported by the cruise support device in a state where the caisson 2 is suspended by connecting the chain 19 to the hoisting bar material 20, if the swinging occurs at the time of berthing and the hauling, the hoisting bar material 20 embedded in the caisson 2 is A horizontal load will act. If this horizontal load exceeds a certain level, the concrete around the hanger bar 20 may be damaged.
[0034]
In order to prevent the breakage of the concrete, it is preferable to install hanging bar material horizontal movement blocking means 28 for preventing the protruding part of the hung bar material 20 from moving relative to the caisson 2 in the horizontal direction.
[0035]
For example, as shown in FIG. 6 to FIG. 8, the hanging bar member horizontal movement preventing means 28 is interposed between a connecting bracket 29 that connects the hanging bar member 20 and the chain 19, and between the connecting bracket 29 and the upper surface of the caisson. The H-shaped steel 30 is used, and the lower surface of the H-shaped steel 30 is provided with a friction material 30b made of hard rubber for preventing slipping.
[0036]
The connection fitting 29 is passed through the connection hole 29a, and the lower end of the chain is supported at the upper portion, and the upper end of the suspension bar material is pivotally supported at the lower portion using the pivot support pin 31. Also, bolt screwing protrusions 32 and 32 are provided at the lower edge of the connection fitting 29, and the bolt screwing protrusion 32 is provided with a screwing hole 32a having a female thread at the center. A push-up bolt 33 is screwed into the screw hole 32a.
[0037]
By tightening the push-up bolt 33 so that a force twice as large as the expected lifting load W is applied, the bolt tip is pressed against the seat plate 30a provided integrally with the H-shaped steel 30 against the tension of the reaction force. Thus, the connecting metal fitting 29 is lifted from the H-shaped steel 30 and a tensile force of 2 W is applied to the hanger 20 by that amount.
[0038]
When the caisson 2 is lifted in this state, if a lifting force of W further acts on the hanger 20, a pulling force of 3 W acts on the hanger 20, but the connecting bracket 29 is still H-shaped steel with a W force. Even when a horizontal load is applied, the connecting metal fitting 29 does not move relative to the H-shaped steel 30, and the H-shaped steel 30 is pressed against the upper surface of the caisson via the friction material 30b. Therefore, it does not move against the horizontal load.
[0039]
Note that the H-shaped steel may be provided for each suspending bar material, or may be an integrated type common to a plurality of suspending bar materials.
[0040]
In addition, the suspension bar horizontal movement preventing means 28 may have the structure shown in FIGS. 8 to 9. In this example, the suspension bar member 20 is inserted in the center and the bottom surface of the suspension bar member is a suspension bar member. A hanging bar protection metal fitting 34 having a shape projecting widely is provided, and a friction material 35 such as hard rubber is interposed between the bottom surface of the metal fitting 34 and the upper surface of the caisson.
[0041]
The suspending bar protection fitting 34 has a chain connecting part 37 in which the lower end part of the chain 19 is connected to the upper end part by a pivot pin 36, and the upper end part of the suspending bar member 20 is located below the chain connecting part 37. A suspension bar connecting portion 38 connected by a pivot pin 36 is provided, and a chain 19 and a suspension bar 20 are connected to each.
[0042]
With this configuration, when a horizontal load is applied to the upper end of the hoist bar protection metal fitting 34, a rotational moment is generated around the base of the protruding portion of the hoist bar material 20, and the bottom surface of the hoist bar protection metal fitting 34 is generated by this rotation moment. Is pressed against the caisson surface, and the movement of the horizontal direction is prevented by the resistance of the friction material 35.
[0043]
【The invention's effect】
As described above, the twin-bottle caisson turning support apparatus according to the present invention includes a pair of buoyancy bodies that are spaced apart from each other so that the upper part of the caisson can be inserted, a connecting beam that connects the buoyancy bodies, and the buoyancy bodies. Provided with a fender that can be expanded and contracted by air pressure, and a buoyant body spacing regulating member that regulates the spacing between the two buoyant bodies, and the connection beam rises upward from each buoyant body A vertical member and a horizontal member for connecting the vertical members, and a caisson suspension means is provided on the horizontal member of the connecting beam, and the upper part of the caisson is inserted between the buoyant bodies, Since the caisson is sandwiched between the fenders in a state of being suspended by the suspension means, even if the caisson is long in the vertical direction, a small amount of sea conditions can be obtained without adding a large amount of ballast. In bad weather conditions, it is cheap enough It can keep the state, it is possible to secure rounding, also, it can be operated at a low cost because it does not use a crane ship that takes a lot of cost.
[0044]
In addition, both buoyancy bodies are formed to have substantially the same length as the plane length of the caisson to be supported for cruise, and the entire structure is strengthened by installing buoyancy body spacing regulating materials on the outer sides of the front and rear ends of the caisson. At the same time, buoyancy increases and a higher sense of stability is obtained.
[0045]
Further, the buoyancy body spacing regulating member is provided with an adjusting means for adjusting the spacing between both buoyancy bodies, at least one of which is regulated by the adjusting means to regulate the buoyancy body spacing, and expand by supplying air to the fender. Thus, the caisson is sandwiched between the fenders of both buoyancy bodies, so that the caisson is favorably supported and the stability is improved.
[0046]
Moreover, the buoyancy body has a hollow portion formed therein, and is equipped with a pouring / draining device capable of taking in / out the water in the hollow portion. In addition, by controlling the pouring / draining of the caisson by the pouring / draining device, the draft of the entire device can be adjusted by adjusting the buoyancy of the buoyant body, and the water in the caisson can be drained. By allowing the caisson to be freely inserted and removed, the caisson can be preferably suspended, and the caisson position can be lowered by pouring water into the buoyant body and the caisson while the caisson is suspended, so that the caisson can be preferably laid.
[0047]
In addition, the lower end of the caisson hanging means is connected to the upper end of the caisson, and the lower end of the caisson hanging means is connected to the hoisting bar material embedded in the caisson and projecting the upper end from the upper surface of the caisson. By providing the suspension bar horizontal movement blocking means for blocking the movement, it is possible to protect the portion of the upper end of the caisson where the suspension bar is embedded, prevent breakage, and safely suspend the caisson.
[Brief description of the drawings]
FIG. 1 is a front view showing an example of implementation of a catamaran caisson turning support apparatus according to the present invention.
FIG. 2 is a plan view of the same.
FIG. 3 is a side view of the above.
4 is an enlarged sectional view taken along line AA in FIG. 3. FIG.
FIGS. 5A to 5D are front views showing the installation procedure of the catamaran caisson turning support apparatus according to the present invention. FIGS.
FIG. 6 is a partially enlarged cross-sectional view showing another embodiment of the present invention.
7A is a front view showing a protective connecting portion of the above example, and FIG. 7B is a sectional view taken along line BB.
FIG. 8 is a partially enlarged front view showing a mounting state of the above-described push-up bolt.
9A is a front view showing another embodiment of the protective connecting portion, and FIG. 9B is a sectional view taken along the line CC.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Caisson rounding assistance apparatus 2 Caisson 3 Buoyant body 4 Connection beam 5 Shaft material 6 Buoyant body space | interval regulation material 7 Hollow part 7a Pouring / draining device 7b Pump 7c Pouring / draining pipe 8 Vertical member 9 Horizontal member 10 Vertical steel material 11 Horizontal steel material 12 Steel material DESCRIPTION OF SYMBOLS 13 Long steel material 14 Connection steel material 15 Steel material 16 Deck part 17 Generator 18 Winch 19 Chain 20 Hanging bar material 21 Connection tool 24 Steel material 25 Band steel plate 26 Receiving part 28 Hanging bar horizontal movement prevention means 29 Connection metal fitting 29a Connection hole 30H Type steel 30a Seat plate 30b Friction material 31 Pivot pin 32 Bolt screw projection 33 Push-up bolt 34 Suspension protection metal fitting 35 Friction material 36 Pivot pin 37 Chain coupling portion 38 Suspension reinforcement material coupling portion

Claims (3)

A pair of buoyancy bodies spaced apart so that the upper part of the caisson can be inserted; a connecting beam for connecting the buoyancy bodies; and a fender that is installed on an opposing surface of each buoyancy body and whose width can be expanded and contracted by air pressure. A buoyant body spacing regulating member that regulates the spacing between the two buoyant bodies, and the connecting beam is a gate type having a vertical member raised upward from each buoyant body and a lateral member connecting the vertical members The caisson suspension means is provided in the transverse member of the connecting beam, the upper part of the caisson is inserted between the buoyant bodies, and the caisson is suspended by the suspension means between the two fenders. The two buoyancy bodies are formed to have a length substantially the same as the planar length of the caisson to be supported for cruise, and the buoyancy body spacing regulating members are respectively installed outside the front and rear end portions of the caisson. Type caisson rounding support device. At the upper end of the caisson, the lower end of the caisson suspending means is connected to the hoisting bar material embedded in the caisson and projecting the upper end from the upper surface of the caisson. The hanger bar horizontal movement blocking means includes a hanger bar horizontal movement blocking means, and the hanger bar horizontal movement hinder means has a connection fitting connected to the upper end of the hanger bar material, and pushes the connection fitting up in a direction away from the caisson upper surface by a bolt. 2. The twin-trunk caisson turning support device according to claim 1 , wherein a tensile force is applied to the suspending material, and a horizontal movement of the suspending material is prevented by a reaction force of the tensile force . At the upper end of the caisson, the lower end of the caisson suspending means is connected to the hoisting bar material embedded in the caisson and projecting the upper end from the upper surface of the caisson. The hanger bar horizontal movement blocking means is provided with a hanger bar horizontal movement hindering means having a hanger bar protection metal fitting having a shape in which a hanger bar material is inserted at the center and the bottom surface is extended widely around the hanger bar material. Further, a friction material such as hard rubber is interposed between the bottom surface of the suspending bar protection metal fitting and the upper surface of the caisson, and the suspending bar material and the caisson suspending means are connected to the suspending bar protection metal fitting, and the suspension bar material is applied by a horizontal load. catamaran type caisson round of claim 1, the bottom surface of the protective metal fitting by rotation moment is so as to prevent the horizontal movement of the hanging muscle material by being pressed against the upper surface of the caisson occurring Support device.

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