JP2689253B2 - Workboat - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a work pontoon used for constructing a concrete or steel structure such as a caisson used as a breakwater.

(Prior Art) Conventionally, as shown in FIG. 5, when constructing a concrete structure C such as a caisson, the construction work is performed by bottoming a work pontoon 1'on a mound G.

(Problems to be solved by the invention) Therefore, when manufacturing a caisson in a deep water place, a large amount of stone or sand is laid on the water bottom G ′ to raise the mound G to make the water depth shallow, or a workbench. It was necessary to raise the side wall of the ship 1'and to use a large work table ship, which required a large amount of cost. In addition, when a large work pontoon was used, it was necessary to tow deep water at the time of launching the caisson, which required time and expense.

The present invention has been proposed in view of the above points, and an object thereof is to increase the mound even at a deep water location or to make the side wall of a work table ship correspond to the water depth and perform complicated work. Work that is highly versatile and can be used even in places with low or deep water, without the need for raising or using a large work table boat, and that saves time and money The purpose is to provide a barge.

(Means for Solving the Problems) According to the present invention, a floatable and unsinkable internal pontoon having a work floor on the upper surface, and a vertically movable body formed to surround the internal pontoon and having a size of a lower portion of the inner wall And an outer body that is smaller than the size of the upper part of the outer wall of the inner ship, and the outer body is a side wall integrated with the inner ship in the upward movement position with respect to the inner ship. doing.

(Operation) The work pontoon of the present invention has the internal pontoon 4 that has the internal floating body 3 and can float freely, and the shape that surrounds the internal pontoon 4 and the size that does not come out upward, that is, the size of the lower part of the inner wall. Has a size smaller than the size of the upper part of the outer wall of the internal pontoon 4 and is vertically movable, and when integrated with the internal floating body 3, an external body that functions as a bulky side wall is provided. , Water is injected into the internal floating body to increase the weight of the internal pontoon and sink it, and then the external body is moved upward, fixed tightly to the internal pontoon and stopped to stop the discharge of the work pontoon. Since it becomes larger and the height of the side wall also becomes higher, it is possible to make a large caisson, and it is not necessary to raise the mound to a large extent, and when launching the caisson, the height of the work pontoon is one internal pontoon. Since it can be set to a high height, it can be launched even in places with a relatively shallow water depth. Noh.

(Example) Hereinafter, the present invention will be described with reference to the drawings.

FIGS. 1 (a) to 1 (e) show a first embodiment of the present invention. In FIGS. 1 (a) and 1 (b), reference numeral 1 denotes a work pontoon. A main body 2 which is a work floor 2a for construction, and an internal pontoon 4 which is a closed internal floating body 3 in which a lower portion of an inner side surface is fixedly provided around the main body 2 and which rises toward an upper side of a slope. And an external body 5 that is a separate structure and is floatable / sinkable outside the internal floating body 3 provided on the internal pontoon 4 and vertically movable with respect to the internal floating body 3. In this case, the outer body 5 has the same shape as the inner body 3 and is configured to surround the inner body 3.
Is a separate body from the internal floating body 3, but when it is located above the internal floating body 3, it functions as a side wall of the work platform 1 together with the internal floating body 3, but the internal floating body 3 alone serves as a structure at a shallow water depth. When C is small, it can be used as a side wall. The working floor 2a of the main body 2 is flat, has a strength capable of withstanding the load of the structure C, and has a rectangular shape as a planar shape, if necessary.
A polygonal shape, a circular shape or the like is appropriately adopted.

Thus, the internal floating body 3 has a hollow chamber sealed inside, and can supply and drain water into and from the hollow chamber by means of a water supply / drainage pipe, a pump, etc., as is well known, although not shown. Further, although the shape of the internal floating body 3 is a square shape in this embodiment, it may be a circular shape or another shape.

On the other hand, the outer body 5 located outside the inner pontoon 4 has the same structure as the inner floating body 3. Further, the shape of the lower portion of the inner side surface thereof is substantially the same as the shape of the upper portion of the outer side surface of the internal floating body 3. Therefore, the inner barge 4 is sunk and the outer body 5
Since the size of the outer wall upper portion a of the inner pontoon 4 is configured to be slightly larger than the shape of the inner wall lower portion b of the outer body 5, the outer body 5 does not slip out and both sides are The inner floating body 3 and the outer body 5 are integrated with each other to function as a side wall by contacting and stopping water. Further, in the present embodiment, as described above, the size of the outer wall upper part a of the inner pontoon 4 is formed to be slightly larger than the shape of the inner wall lower part b of the outer body 5 so that the outer body 5 does not come out. Since it is configured as described above, a member for preventing the external body 5 from coming off is not necessary, and the structure is simple. In this case, it is needless to say that the water-stopping property can be improved more by sticking a water-stopping rubber or the like on the contact surfaces or on one of the contacting surfaces.

In addition, in the figure, G is a bottoming mound, W'is water injected into the inner floating body 3, and W "is water injected into the outer body 5.

Next, a method of launching the work platform 1 in this embodiment will be described.

As shown in FIG. 1 (a), first, when water W'is put into the inner floating body 3 of the inner pontoon 4 and allowed to sink, the outer body 5 is now floating on the water, so The entire height of 1 is raised, and the inner pedestal 3 and the outer body 5 are fixed by bolt connection or pin connection (not fixed). Further, when water W ″ is put into the inside of the outer body 5, the entire work pontoon 1 sinks and bottoms on the mound G.

Then, in this state, the structure C is built on the work floor 2a.

Next, as shown in FIG. 1C, the water W ′, W ″ in the inner floating body 3 and the outer body 5 is drained to the outside, and the work pontoon 1 ′ carrying the structure C is mounted on the mound G. Then, the ship is towed to a predetermined position by a towing ship (not shown).

Then, as shown in FIG. 1 (d), when the water is launched into the structure C, water W ″ is injected into the outer body 5,
The work W is injected into the main body 2 and the internal floating body 3 while being separated from the internal floating body 3 and infiltrating the water W into the internal pontoon 4 having the structure C. Let it sink. In this case, the water W enters the inside of the internal pontoon 2 through the space between the outer body 5 and the inner floating body 3, and the sinking of the internal berth 4 is promoted.

When the work platform 1 is sunk, the structure C is shown in FIG. 1 (e).
As shown in, the work floor 2a is detached and floats. Next, the work platform 1 is pulled out from directly under the structure C. In this case, since the outer body 5 is moving downward, the height of the work pontoon 1 can be set to about half the height when the caisson was manufactured, so that it can be pulled out even at a shallow water depth (see FIG. )reference). In the figure, S is, for example, a cushioning material and a seal provided on the internal floating body 3 side.

FIG. 2 shows a second embodiment of the present invention. In this embodiment, another second outer body 6 having the same shape but large size is provided outside the outer body 5. The feature is that it can be applied to deeper water. Thus, it is possible to provide n external bodies as needed.

In this embodiment, the height of the entire body can be selected only by lifting and lowering the outer bodies 5 and 6, so that the range of water depth that can be utilized by one unit is widened, which is economical.

 Other configurations and operations are similar to those of the above-described embodiment.

FIG. 3 shows a third embodiment of the present invention, in which only the overlapping portions of the inner floating body 3 and the outer body 5 are formed with slopes 3a, 5a protruding from each other, and the inner floating body 3 and the outer body 5 are formed. The side surface of the work table 1 is formed in a substantially vertical shape to prevent the plan view of the work pontoon 1 from becoming large.

FIG. 4 shows a fourth embodiment of the present invention. In this example, a proper number of outer bodies 7 surrounding the outer circumference of the inner floating body 3 are provided, and these outer bodies 7 are moved up and down by a lifting device 8 as needed. The side wall having a desired height can be obtained.

That is, the hoisting device 8 includes a column 9 projecting from the internal floating body 3, a winch support 10 projecting outward from the upper part of the column 9, and a winch support 10
A predetermined number of winches 11 provided corresponding to the outer body 7 and for moving the outer body 7 up and down.
A side wall having a desired height can be configured by driving the outer body 7 by driving the. In this case, the contact portion between the outer bodies 7 has a sloped structure as in the embodiment shown in FIG. Further, the lifting device 8 may be configured to use hydraulic pressure or a pneumatic jack.

In addition, in the said 1st-4th Example, the pump which injects and drains inside the internal floating body 3 and the external bodies 5 and 6 may be provided in itself, or may be provided on land or on the water. . The compressor equipment for supplying air to the inside of a floating body submerged in water is similar to a pump.

(Effects of the Invention) As described above, according to the present invention, an internal pontoon that has a work floor on its upper surface and is freely floatable and retractable; An outer body having a size smaller than the size of the upper part of the outer wall of the inner pontoon, and the outer body being a side wall integrated with the inner pontoon in the upward movement position with respect to the inner pontoon. Since the drainage of the work pontoon is large and the height of the side wall can be made extremely easy, it is possible to make a large size, and it is not necessary to greatly raise the mound even in a deep water place and the external body There is no need for a member to prevent the slip-out, and the structure is simple.

Further, when launching the caisson, the height of the work pontoon can be set to the height of one internal pontoon by lowering the outer body, so that the caisson can be launched even at a relatively shallow water depth.

Further, it can be used even in a place with low water depth without moving the external body upward, and has the advantage of high versatility.

[Brief description of the drawings]

1 (a) to (e) are the first embodiment of the present invention.
(A), (c), (d), (e) are explanatory views showing the outline of the working process, (b) is a plan view, FIG. 2 is a second embodiment of the present invention, and FIG. 3 is the present invention. 4 is a fourth embodiment of the present invention, and FIG. 5 is a conventional example. 1 ... Work pontoon, 2a ... Work floor, 2 ... Main body, 3 ... Internal floating body, 4 ... Internal pontoon, 5-7 ... External body, 8 ... Lifting device, 9 ... Post, 10 ... winch support, 11 ...
... winches, C ... concrete structures, G ... mounds, G '... water bottom.

Claims (1)

(57) [Claims] 1. A floatable and sunk internal pontoon having a work floor on its upper surface, and an upper and lower outer wall of the internal pedestal, which is formed so as to surround the internal pontoon and is vertically movable. And an outer body smaller than the size of the inner carrier, the outer member being a side wall integrated with the inner carrier in the upward movement position with respect to the inner carrier.