JPS61229010A - Off-shore working platform - Google Patents

Abstract

PURPOSE:To improve working efficiency, by a method wherein pontoons for movement are respectively removably mounted to the legs of a platform, and pontoons for mounting and demounting, each removably closing the open port of the engaging notch of the pontoon for movement, are provided. CONSTITUTION:With struts 5 lowered, a working platform A is secured, and after a platform 1 and pontoons 6 for movement are released from coupling, the platform 1 is jacked up with the aid of an elevating device 3. After the pontoon 6 for movement and a pontoon 11 for mounting and demounting are released from coupling and the pontoon 11 is removed, the pontoons 6 for movement are pulled out. After the level of the platform 1 is regulated with the aid of the elevating device 3, piles are driven within a space S, and a given work is completed. Further, after the platform 1 is lowered and the two pontoons 6 and 11 are mounted to the platform 1, the working platform is tugged to a subsequent site.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a marine work platform used for driving piles into the sea.

[Prior Art] Such a workbench is towed to the work site by a tugboat, and at a predetermined position, the supports provided at the four corners of the workbench are lowered to the seabed to secure the workbench, and the workbench is lifted and lowered using the legs. Raise the platform and install it in a fixed position. The piles are driven into the sea from the workspace in the center of the workbench, but because the head of the pile protrudes into the workspace, when the workbench is moved into the water for pile driving, the piles are driven into the sea from the workspace in the center of the workbench. It will interfere.

In order to avoid this interference, the conventional methods were to (a) lift the workbench using a large crane, (b) make the workbench a flat shape with one open corner, or (c) use piles to An overbridge type with a height that would not interfere was used (see Japanese Patent Application Laid-Open No. 1005/1983).

[Problems to be solved by the invention] However, in the case of (a), the workability is poor due to extensive setup, and in the case of (g), the rigidity of the workbench is reduced, and furthermore, in the case of (c) In this case, it will be a large workbench.

Furthermore, in conventional offshore work platforms, the platform and barge are integrated, and therefore a large elevating device must be installed in order to jack up the work platform for pile driving work, etc.

The present invention has been made in order to eliminate the above-mentioned drawbacks of conventional marine work platforms that have a working space in the center. The purpose is to provide a marine workbench that can be made into a minimum shape workbench and has good workability without requiring large steps.The other purpose is to jack up and jack down the workbench (platform). To provide a marine work platform that only needs to be equipped with a small lifting device.

[Means for Solving the Problem] Therefore, according to the present invention, the planar shape is rectangular, a work space is formed in the center, legs extending downward are provided at each corner, and legs are provided at each corner. A platform of the same front shape provided with a lifting device, a column extending through each leg at each corner of the platform where a lifting device is provided, and two engagements that engage with two columns at the front and rear of the column. A pair of left and right moving pontoons are formed with cutouts and are removably connected to the lower ends of the two front and rear legs of the platform, and an engagement notch of the moving pontoons is engaged with the support column. A marine work platform is provided which includes a pontoon that removably fills the opening of the engagement notch while being fixed to the leg of the platform.

[Operations and Effects of the Invention] As described above, in the marine work platform according to the present invention, the platform and the pontoon, that is, the barge, are separate bodies, so when the marine work platform is towed to a work site or when performing work at one location, When moving the offshore work platform after completion of the work, attach the moving pontoon to the platform to give the work platform the necessary buoyancy for towing. Remove from and jack up only the Arabto form. The platform is rectangular in plan, with a work space in the center and a circular front with legs extending downward at each corner. Structures such as piles do not interfere with the platform (workbench) when moving it. Moreover, the only thing that can be jacked up or jacked down is the platform, and a small lifting device may be provided.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

The marine workbench, which is generally indicated by A in Figures 1 to 5, is a front gate-shaped platform that has a rectangular planar shape, forms a workspace S in the center, and has legs 2 extending downward at each corner. 1. This platform 1
A lifting device 3 is provided at each corner of the platform 1, and the platform 1 is provided with a hammer leader and other equipment and devices for driving piles, although not shown.

Four pipes 2a forming legs 2 of platform 1
As shown in FIGS. 8 and 9, four engagement fittings 4 made of plates made of plates for attaching moving pontoons 6 to the platform 1, which will be described later, are fixed in a cross shape to the outer peripheral surface of each of the platform 1. There is.

At each corner of the platform 1 where the lifting device 3 is located, it is provided with a column 5 extending through each l113, which column 5 supports the platform 1 and, in conjunction with said lifting device 3, jacks up or lifts the platform 1. This is to make you feel less nervous.

It is equipped with a pair of left and right moving pontoons 6 that serve as buoyant bodies when towing the marine work platform A, and this moving pontoon 6 has two engagements that engage with the two front and rear columns 5 of the column 5. A notch 7 is formed. In addition, mobile pontoon 6
As shown in FIG. 5, FIG. 6, FIG. 8, and FIG. The lower ends of the four vibrators 2a constituting the legs 2 of the platform 1 are received by the catch seats 8. As shown in FIGS. 8 and 9, each catch seat 8 is made up of two plates with a distance between them at which the engaging fitting 4 of the pipe 2a constituting the leg 2 of the platform 1 is inserted. The locking metal fittings 9 are fixed in a cross shape. As shown in FIGS. 8 and 9, a vibrator 2 forming the legs 2 of the platform 1
By engaging the engagement fitting 4 on the a side with the locking fitting 9 on the receiving seat 8 side of the moving pontoon 6, and passing the stop pin 10 through the engaging fitting 4 and the locking fitting 9, the moving pontoon 6 is Mounted on platform 1.

Engage the engagement notch 7 of the moving pontoon 6 with the support column 5,
The mobile pontoon 6 is connected to the platform 1 in the manner described above.
As shown in FIGS. 6 and 7, it is equipped with an underwear pontoon 11 that fills the open lower b (FIG. 5) of the engagement notch 7, and this detachable pontoon 11 is inserted into the engagement notch 7. Fit it into the open lower b and fix it with the fixing pin 12.

Next, the manner in which the marine workbench is used will be explained in order.

(a) Mobile pontoon 6 attached to platform 1! ! ! (In the state shown in FIGS. 1 to 3), the workbench generally indicated by A is towed to the work site and positioned.

(b) Lower the support column 5 and secure it to the workbench.

(c) Remove the fixing bin 10 that fixes the platform 1 and the moving pontoon 6.

(d) Judge up the form 1 using the lifting device 3. Since only the platform 1 is jacked up, the elevating device 3 may be small.

(E) Fixed bin 1 that fixes the detachable pontoon 11
Remove 2.

(f) Remove the detachable pontoon 11.

(g) The state shown in FIGS. 4 and 5 when the moving pontoon 6 is pulled out laterally).

(H) Adjust the level of the platform 1 using the lifting device 3.

(S) A pile is driven into the work space S of the platform 1 using, for example, a hammer leader. Prescribed work completed.

(J) Move the moving pontoon 6 from the side toward the platform 1, engage the engaging portion 7a of the engagement notch 7 of the moving pontoon 6 with the support column 7, and move the moving pontoon 6 under the platform 1. Put it in.

(l) Insert the detachable pontoon 11 into the open lower b of the engagement notch 7 of the moving pontoon 6 and fix it with the fixing pin 12.

(E) Lower the platform 1 while guiding it with the struts 5 so that its legs 2 rest on the seats 8 of the moving pontoon 6.

(W) The fixing pin 10 is passed through the engaging fitting 4 on the leg 2 side of the platform 1 and the locking fitting 9 on the receiving seat 8 side of the movable pontoon 6, which are engaged with each other.

(Force) Raise the strut 5 and make the engagement notch 7 of the strut 5. Tow work platform A to the next work site.

At this time, since the platform 1 is circular in front, structures such as piles driven into the work space S of the platform 1 will not interfere with the platform 1.

[Brief explanation of drawings]

The drawings show embodiments of the invention, FIGS. 1, 2 and 3.
The figures are a front view, a side view, and a plan view of the offshore work platform with the mobile pontoon attached to the platform, and Figures 4 and 5 are the front view of the offshore work platform with the mobile pontoon removed from the platform. Figures and plan views, Figures 6 and 7 are diagrams showing the relationship between the moving pontoon and the detachable pontoon, and Figure 6 is the second
FIG. 7 is a cross-sectional view taken along the line A-A in the figure, FIG. 7 is a view taken along the line B-B in FIG. is C-C in Figure 1
The line sectional view, FIG. 9, is a D-DI arrow diagram of FIG. 1... Platform 2... Legs 3... Lifting device 4... Engagement fittings 5... Support column 6...
・Moving pontoon 7...Engagement notch 8...
Catcher 9... Locking metal fitting 10... Fixing pin
11... Detachable pontoon 12... Fixed bin Figure 6 No. 7

Claims (1)

[Claims] A front gate-shaped platform that has a rectangular planar shape, has a work space in the center, has legs extending downward at each corner, and is equipped with a lifting device at each corner, and a platform that lifts and lowers the platform. A strut extending through each leg at each corner where the device is provided, and two engagement notches for engaging with the two front and rear struts of the said strut, the two front and rear legs of the platform being formed. a pair of left and right moving pontoons that are removably connected to the lower end of the moving pontoons; and when the engaging notches of the moving pontoons are engaged with the pillars and fixed to the legs of the platform, the openings of the engaging notches are opened. A marine workbench characterized by comprising a removable pontoon that can be removably inserted.