JPH0544519B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for sinking a submerged box and a work boat for carrying out the method.

[Prior art and its problems] In order to construct a tunnel under water by sinking a box, a work boat is moved to the place where the box is to be sunk, the work boat is fixed with an anchor, and the crane of the work boat is moved. The submerged box construction method, in which the box is sunk in the required location, was often adopted.

However, this conventional construction method requires an anchor space to secure the work boat, and has the disadvantage that it requires a lot of manpower and time to center the work boat.

That is, when working on a workboat in a river or ocean, the vessel is shaken by waves, moved horizontally by currents, and moved vertically by the ebb and flow of the tide, making it difficult to determine the sinking position of the box. Therefore, the work of immersing the immersed box adjacent to the existing one was troublesome.

[Object of the Invention] Therefore, an object of the present invention is to provide a method for sinking a submerged box that allows relatively accurate positioning and submersion of the submerged box, and that does not require much manpower and time, and a work boat that implements the method. is to provide.

[Means for Solving the Problem] According to the present invention, a work boat equipped with a floater bag is moved and positioned to the submerged location of the box, and the legs of the work boat are lowered by a lifting device to fix the work boat. , suspend the new box, remove the air from the floater bag, lower the work boat using the lifting device, lower the new box adjacent to the existing box, and fine-tune the center alignment with the existing box. After adjusting the horizontal direction and aligning the center of the existing box with the center of the new box, set the new box on the sent existing box.

Further, according to the present invention, there is provided a pair of work boat floating box frames on the left and right which are provided with a large number of floater bags and are spaced apart from each other at a predetermined interval, and the work boat floating box frames are provided with a plurality of floater bags at a predetermined interval. They are connected by a pair of front and rear work boat connection frames that are separated from each other, and at the intersection of the work boat floating box frame and the work boat connection frame, a leg and a lifting device for raising and lowering the leg are provided. Each work boat connecting frame is provided with a traveler equipped with a box lifting jig that runs sideways along the work boat connecting frame and suspends the box, and the box lifting jig is directed downward. It consists of a pair of hanging rods that are inclined so as to converge and are connected to the hanging hardware of the box at the lower end, and a center hole jack that changes the length of the hanging rods.

[Operations and Effects of the Invention] According to the present invention, the work boat is equipped with legs and a lifting device, and the legs are lowered by the lifting device to fix the work boat, so no anchor space is required. In addition, the newly constructed box is suspended using a box lifting jig that also serves as a box delivery mechanism installed on the work boat, fine adjustment of center alignment with the existing box is made, and vertical adjustments are made using a lifting device or a box lifting jig. By adjusting the length of the hanging rod of the body lifting jig, and horizontal adjustment is done by moving the traveler equipped with the box lifting jig, the new box can be attached to the existing one. center alignment, that is, positioning of the newly installed box, can be done easily and quickly, and the sending of the newly installed box is done by changing the length of the two hanging rods of the box lifting jig. Therefore, it can be done easily and reliably.

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

First, a description will be given of the work boat A that implements the submerged box submersion method according to the present invention.A pair of left and right work boat floating box frames 1, 1 are provided with a space apart
A large number of floater bags 2 are provided in each work boat floating box frame 1. Air is supplied to the floater bag 2 from an air compressor (not shown) provided on the work boat, and air is discharged from the floater bag 2.

The work boat floating box frames 1, 1 are connected by a pair of front and rear work boat connecting frames 3, 3, and there are legs 4 and lifts at the four corners where the work boat floating box frame 1 and the work boat connecting frame 3 intersect. A device 5 is provided. The leg 4 is raised and lowered by this lifting device 5, and the leg 4 is lowered to fix the work boat A, and the air in the floater bag 2 is removed. is raised and lowered by the legs 4 and the lifting device 5.

A rail 6 extending in the longitudinal direction of the frame 3 shown in FIG. 8 moves horizontally to finely adjust the box in the horizontal direction. Traveler 8 has center hole jack 9 and its jack 9
A pair of hanging rods 10 whose length can be changed by
It is equipped with a box lifting jig that also serves as a box delivery mechanism, and the hanging rods 10, 10 are inclined so as to converge downward, and the newly installed box is opened at the lower end. It is connected to the hanging hardware 11 of the body B, and suspends the box B. The box B is sent out by changing the length of the hanging rod 10 using the center hole jack 9. In addition, fine adjustments in the vertical direction of the box B can be made using the lifting rod 1 together with the lifting device 4 mentioned above.
This is done by adjusting the length of 0.

The work boat A is provided with an upper deck 12, and is also provided with an air compressor, a generator, a control device, and various other necessary equipment, although not shown.

Next, the procedure for sinking the box using the work boat A will be explained.

Using the buoyancy of floater bag 2, move and position work boat A to the location where the new box will be sunk.
The work boat A is fixed by lowering the leg 4 using the lifting device 5. Note that the positioning is performed with accuracy within the adjustment range of the traveler 8, which will be described in detail later (FIG. 1).

The newly installed box B is pulled into the work boat A, and the box is suspended using a box lifting jig. That is, as shown in Fig. 5, the lower ends of the hanging rods 10, 10 are connected with bolts or the like to the hanging hardware 11 attached to the newly installed box B by welding or the like, and the box B is suspended (second
figure,).

Remove the air from the floater bag 2, and lift the lifting device 5.
is activated to lower work boat A using leg 4, and sink box B suspended from work boat A. Fine adjustment in the vertical direction (level) is then performed by adjusting the length of the lifting device 5 or the hanging rod 10 using the center hole jack 9.
Match the level of the newly installed box B to the level of B'. In addition, the traveler 8 is moved horizontally to make fine adjustments in the horizontal direction between the existing box B' and the new box B (Fig. 3,
).

In FIG. 5, by changing the length of the hanging rods 10, 10 using the center hole jack 10, a new box B is sent out and set on the existing box B' (FIG. 4).

Thereafter, the same operation is performed to sink the submerged box and construct a tunnel under the water surface.

[Summary] As described above, according to the present invention, a new box can be correctly positioned and set with respect to an existing box, the work is simple, and work efficiency can be improved.

[Brief explanation of the drawing]

Figures 1 to 4 are a perspective view and a plan view showing the procedure for sinking the box, and Figure 1 shows the movement, positioning, and lowering of the legs to fix the workboat. Figure 2 shows the state of the box being pulled in and suspended by the box lifting jig, Figure 3 shows the state of removing the air from the floater bag and sinking the box and aligning the centers. The state in which the box is sent out and set into the existing box is shown. FIG. 5 is a sectional view of a traveler equipped with a box hanging jig that also serves as a box delivery mechanism. A...Work boat, B...New box, B'...Existing box, 1...Floating box frame, 2...Floater bag, 3...Connection frame during work, 4...Leg, 5
... Lifting device, 6 ... Rail, 8 ... Traveler,
9...Center hole jack, 10...Hanging rod, 11...Hanging hardware.

Claims (1)

[Scope of Claims] 1. A work boat equipped with a floater bag is moved to and positioned at the location where the box is to be sunk, the legs of the work boat are lowered by a lifting device to fix the work boat, and the newly installed box is suspended. Let the air out of the floater bag, lower the work boat using the lifting device and sink the new box adjacent to the existing box, make fine adjustments to align the center with the existing box, make horizontal adjustments, and lower the work boat to the existing box. A method for submerging a submerged box, which is characterized in that after the center of the box and the center of the newly installed box match, the newly installed box is sent out and set on the existing box. 2. It has a pair of work boat floating box frames on the left and right that are equipped with a large number of floater bags and are spaced apart from each other by a certain distance; They are connected by a pair of front and rear work boat connection frames, and a leg and a lifting device for raising and lowering the leg are provided at the intersection of the work boat floating box frame and the work boat connection frame, and each work boat connection frame is equipped with a traveler equipped with a box lifting jig that travels along the work boat connection frame and suspends the box, and the box hoisting jig converges as it moves downward. 1. A work boat characterized by comprising a pair of hanging rods that are inclined as shown in FIG.