JP2005009070A - Installation method for structure on water and pontoon used in it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an installation method for a structure on water and a pontoon used in it for transporting and installing the structure without receiving restriction of height, ensuring stability and safety when transporting and installing it, and performing efficient work when constructing facility on water such as a pier. <P>SOLUTION: In this installation method for the structure on water, structures such as bridge pier, caisson, and jacket manufactured on the ground in advance are transported to an installation section by the pontoon while at least part of them is immersed in water and then installation work is performed. Consequently, transportation and installation work are performed without being restricted so much in height as in a conventional method, and safety is ensured without necessitating a measure for suppressing swing of the structures in long distance transportation such as tour on the ocean. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an installation method for installing a floating structure such as a pier constituting a pier, a bridge, or the like at a predetermined installation location, and a trolley used therefor.
[0002]
[Prior art]
In recent years, when constructing water facilities such as piers and bridges, structures such as piers, caissons, and jackets that make up these are manufactured in advance on the ground, and suspended by a hoist ship (for example, see Patent Document 1) Alternatively, it is widely used a method of loading on a trolley, transporting it to an installation site at a construction site, and installing it at the site.
[0003]
However, in such a method, the height of the structure itself or the hoist that lifts the structure is specified by the Aviation Law, for example, the height of the bridge existing on the route during transportation, or when the route or installation location is near the airport. The height limit may be exceeded. Further, when the structure is suspended by a hoist ship and crushed in the open ocean for transportation, a measure for suppressing the shaking of the structure as described in Patent Document 1 is required.
[0004]
Usually, at the construction site of such a floating facility, an anchor is installed on the bottom of the water, a wire is pulled out from the anchor, and the wire is connected to the ship to guide the ship transporting the structure to a predetermined installation location. ing. Here, in the case of the conventional hoist ship and trolley as described above, since the structure suspended by the hoist is projected and installed in front of the ship, the wire connecting the anchor and the hull becomes long, There is a problem that it is difficult to handle and that the wire itself may damage the temporary piles and existing structures provided on the bottom of the water.
[0005]
Furthermore, when transporting by the conventional hoist ship or trolley as described above, a work ship provided with a pile driving device is separately required in order to perform the pile driving work for fixing the installed structure.
[0006]
[Patent Document 1]
Japanese Patent No. 2758568 [0007]
[Problems to be solved by the invention]
In view of the above-described problems of the prior art, the present invention enables the structure to be transported and installed without excessive height restrictions, and provides stability and safety during transportation and installation work. It is an object of the present invention to provide a method for installing a floating structure and a trolley used therefor, which can also ensure efficient operation.
[0008]
[Means for Solving the Problems]
For these purposes, the method for installing a floating structure according to the present invention is:
When installing a floating structure,
Transporting the prefabricated structure to a place where the structure is installed while supporting at least a part of the structure in a state of being submerged by a trolley;
And a step of installing the structure at the installation location.
[0009]
The method for installing a floating structure according to the present invention further includes a pile driving step for fixing the structure by a pile driving means provided on the carriage.
[0010]
The trolley used in the method for installing a floating structure according to the present invention is:
An accommodating part for accommodating the structure in a state where at least a part of the structure is submerged in water;
Means for supporting the structure;
It is something that has.
[0011]
The trolley used in the method for installing a floating structure according to the present invention is such that the accommodating portion is an opening provided in front of the hull.
[0012]
Moreover, the trolley used in the method for installing a floating structure according to the present invention further includes a driving means for moving to the installation location of the structure.
[0013]
Furthermore, the trolley used in the method for installing a floating structure according to the present invention further comprises a pile driving means for fixing the structure.
[0014]
【The invention's effect】
The method for installing a floating structure according to the present invention is such that when a structure such as a pier, caisson, jacket, etc., manufactured in advance on the ground is transported by a carrier, at least part of the structure is submerged in water and transported to the installation location. After that, installation work will be performed.
[0015]
As a result, unlike conventional methods, transportation and installation work can be performed without much height restrictions, and the structure can be prevented from shaking during long-distance transportation such as when sailing in the open ocean. Therefore, safety can be ensured without the need for measures. In addition, the structure can be transported at a level approximately equal to the water surface height when installed at the installation location, and the installation work can be performed more efficiently.
[0016]
Moreover, the installation method of the floating structure by this invention is good also as providing the pile driving | operation process for providing a pile driving means in the trolley which transports a structure, and fixing the structure after installation. As a result, it is possible to perform an efficient construction work on the water facility without requiring a pile driving work boat or the like.
[0017]
The trolley used in the method for installing a floating structure according to the present invention shall transport the structure to be transported to an installation location with at least part of it submerged in water, and the structure can be unloaded at the installation location. Yes. As a result, transportation and installation work can be performed without excessive height restrictions as in the case of using conventional hoist ships and trolleys, and safety during transportation can be sufficiently ensured. . In addition, since the structure can be transported at a level substantially equal to the water surface height when installed at the installation location, the installation work can be performed more efficiently.
[0018]
Further, the trolley used in the method for installing a floating structure according to the present invention has an opening formed in front of the hull, and the structure is accommodated and transported in the opening. Therefore, the hull itself can be guided close to the installation location of the structure, the wire for guidance can be shortened, the wire can be easily routed, and the temporary support pile by the wire or the existing structure The possibility of damaging objects is also reduced.
[0019]
Furthermore, the trolley used in the method for installing a floating structure according to the present invention may be provided with a driving means for moving to the installation location of the structure, thereby transporting the structure to the installation location accurately and reliably. This makes it possible to perform more efficient construction work on the water facility, and it is possible to shorten the construction period and reduce the construction cost.
[0020]
In addition, the pontoon used in the method for installing a floating structure according to the present invention may further include a pile driving means for fixing the structure, whereby the structure transported to the installation site is immediately available on the spot. It can be fixed by stakeout, and it is possible to perform more efficient construction work without using other stakeout work vessels, etc., which can contribute to shortening the construction period and reducing construction costs It becomes.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
[0022]
1 to 3 show a trolley used for an installation method according to the present invention. FIG. 1 is a side view, FIG. 2 is a plan view, and FIG. 3 is a front view. The trolley 1 shown in the figure is a non-self-propelled type that does not have a means for navigating by itself, and is navigated by being pushed by a pusher 3 (two in the figure) connected to the hull 2. Further, the figure shows a state where a structure 4 having a flat upper surface called a jacket, which is used for a pier or a marine road, is transported.
[0023]
An opening 5 is formed in front of the illustrated boat 1. The opening 5 is a housing portion for housing the structure to be transported (here, the jacket 4) in a state where at least a part of the lower portion is submerged in water. Are provided with jacks 6 (three on the left and right in the figure), and these jacks support the jacket 4 during transportation. In the figure, the jacket 4 is transported together with the foundation pile 7 when the jacket 4 is fixed to the installation location. In addition, it goes without saying that the stroke height of the jack 6 can be adjusted by the height of the structure to be transported and the depth of the channel, but from the viewpoint of improving the efficiency of the installation work, the structure of the structure to be transported It is preferable to match the height from the water surface at the installation location.
[0024]
The winch 8 provided on the hull 2 is a driving means for guiding the carriage 1 to the installation location of the jacket 4 as will be described later, and is used for feeding / rewinding the wire. A side thruster 9 is provided on the side of the hull. This side thruster 9 is also used to move the carriage 1 to the installation location of the jacket 4 as a driving means.
[0025]
Further, the main boat 1 is equipped with a pile driving crane 10. The crane 10 is a pile driving means for fixing the jacket 4 to the installation location, and is for driving the pile 7 after the jacket 4 is installed. In the figure, two cranes 10 are depicted, but one crane may be used, or three or more cranes may be mounted. The hull 2 is further provided with a standby floor 11 for waiting the crane 10 during transportation and a folding bridge 12 connecting the jacket 4 and the standby floor 11. Needless to say, the standby floor 11 is provided so that the height of the upper surface thereof is equal to the height of the upper surface of the jacket 4.
[0026]
Next, FIG. 4 to FIG. 9 show the installation process of the jacket 4 using the above-described carriage, that is, the procedure of the installation method according to the present invention. Hereinafter, each procedure will be described with reference to these drawings.
[0027]
First, as shown in FIG. 4, the jacket 4 manufactured in advance on the ground is lifted from the quay 13 using an existing hoist ship 12 (which is a non-self-propelled type here). Next, as shown in FIG. 5, the hoist ship 12 is towed by the dredger 14 and moved to a delivery place for delivering the jacket 4 to the carrier 1 according to the present invention. Here, the hoist ship 12 is used for transferring the jacket 4 to the water. The hoist that can lift a large and heavy structure, such as the jacket 4, is based on the size and weight of the hoist itself. Usually, it cannot be installed on the ground, and usually the water depth near the quay is shallow.
[0028]
When arriving at the delivery place, the hoist ship 12 is moored as shown in FIG. 6, while the carriage 1 moves toward the hoist ship 12. Next, as shown in FIG. 7, the jacket 4 and the carrier 1 are connected with a lead-in wire (not shown) while being suspended by the hoist vessel 12, and the carrier 4 is moved to move the jacket 4 to the opening 5. The jacket 4 is supported by the jack 6. Then, the jacket 4 is separated from the hoist ship 12. Thereby, the loading of the jacket 4 onto the carriage 1 is completed.
[0029]
Thereafter, as shown in FIG. 8, the carriage 1 is moved to the installation location of the jacket 4 (that is, the construction site of the water facility). Here, since the trolley 1 is a non-self-propelled type, it is pushed by the pusher 3 and sails. And when it arrives at an installation location as shown in FIG. 9, the jacket 4 is installed on the provisional pile (not shown) previously installed in the water bottom by operation | movement of the jack 6. FIG. Next, the folding bridge 12 (see FIGS. 1 and 2) is tilted to connect the jacket 4 and the standby floor 11, the pile driving crane 10 is moved from the standby floor 11 onto the jacket 4, and the foundation pile 7 is grounded. Place to a predetermined depth inside. After the placement of the foundation pile 7 is completed, the base boat 1 and the jacket 4 are completely separated by operating the jack 6 and adjusting the ballast of the hull 2, and the base boat 1 is further moved from the installation location. Thereby, the installation work of the jacket 4 is completed.
[0030]
FIG. 10 is a view of the installation work of the jacket 4 as viewed from above. Here, it is assumed that a water facility (for example, a pier, a marine road, etc.) in which a large number of jackets 4 are arranged in a horizontal direction is constructed.
[0031]
The carrier 1 that has transported the jacket 4 to the construction site first needs to approach this installation location in order to install the carried jacket 4 at a predetermined installation location. Therefore, the wire 16 drawn out from the anchor 15 installed at the bottom of the water is wound up / rolled out by the winch 8 and moved in the direction indicated by the arrow in the figure. In addition, a side thruster 9 provided on the side of the hull 2 is also operated.
[0032]
As described above, in the case of the main ship 1, the hull 2 can be brought closer to the installation location of the jacket 4, in other words, the existing jacket 4, as compared with the case where a conventional hoist ship or a carrier ship is used. Therefore, the length of the wire 16 can be shortened, the handling of the wire becomes easy, and the possibility of damaging the temporary piles and the existing structure by the wire is reduced.
[0033]
In addition, since the side thruster 9 is provided in the hull 2, the carriage 1 can be moved by the operation of the side thruster 9, so that the carriage 1 can be installed on the jacket 4 without being guided by the wire 16. It is also possible to move up to.
[0034]
As a result, the installation work time for each jacket 4 can be shortened, and the construction period can be shortened.
[0035]
As described above, according to the method for installing a floating structure according to the present invention and a trolley used for the method, in the construction of a floating facility such as a pier and a bridge, transportation of structures such as piers and caissons constituting these can be performed. Installation can be performed efficiently, and the construction period can be shortened and the construction cost can be reduced. In particular, when it is constructed by a combination of a large number of structures such as a pier, the effect is greatly exerted.
[0036]
In addition, this invention is not limited to embodiment mentioned above, A various form is possible within the scope of the present invention. For example, in the above-described embodiment, the jacket is transported and installed as an example. However, the present invention can be applied to the transportation and installation of other structures such as piers and caissons, and the carriage may be self-propelled. Needless to say.
[Brief description of the drawings]
FIG. 1 is a side view showing a trolley used for an installation method according to the present invention.
FIG. 2 is a plan view showing a trolley used for an installation method according to the present invention.
FIG. 3 is a front view showing a trolley used for an installation method according to the present invention.
FIG. 4 is a diagram showing a procedure of an installation method according to the present invention.
FIG. 5 is a diagram showing a procedure of an installation method according to the present invention.
FIG. 6 is a diagram showing a procedure of an installation method according to the present invention.
FIG. 7 is a diagram showing a procedure of an installation method according to the present invention.
FIG. 8 is a diagram showing a procedure of an installation method according to the present invention.
FIG. 9 is a diagram showing a procedure of an installation method according to the present invention.
FIG. 10 is a top view of a jacket installation operation according to the present invention.
[Explanation of symbols]
1 Ship 2 Ship 1 Hull 3 Pusher 4 Jacket 5 Opening 6 of Hull 2 Jack 7 Foundation Pile 8 Winch 9 Side Thruster 10 Pile Crane 11 Crane Standby Floor 12 Folding Bridge 13 Wharf 14 Dredger 15 Anchor 16 wires

Claims (6)

When installing a floating structure,
Transporting the prefabricated structure to a place where the structure is installed while supporting at least a part of the structure in a state of being submerged by a trolley;
A step of installing the structure at the installation location, and a method of installing the floating structure. The method of claim 1, wherein
A method for installing a floating structure, further comprising a pile driving step for fixing the structure by a pile driving means provided on the carriage. A trolley used in the method according to claim 1 or 2,
An accommodating portion for accommodating the structure in a state in which at least a part thereof is submerged in water;
Means for supporting the structure;
A trolley with In the trolley according to claim 3,
A trolley used for a method for installing a floating structure, wherein the housing portion is an opening provided in front of the hull. In the trolley according to claim 3 or 4,
A trolley for use in a method for installing a floating structure, further comprising drive means for moving to the installation location of the structure. In the trolley of any one of Claims 3-5,
A trolley for use in a method for installing a floating structure, further comprising a pile driving means for fixing the structure.

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