JPH0342119Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention is designed to prevent corrosion from occurring in the pile head, splash zone, and tidal zone of an underwater steel pipe pile. This relates to an open-top work box for underwater steel pipe piles that can be installed to drain water and dry parts above the tidal zone for investigation, repair, inspection, corrosion protection, and other work.

(Prior art) Submerged steel pipe piles are destined to undergo severe corrosion due to seawater, etc. If left untreated, the original function of the pier may deteriorate, and even become unusable. Repairs are urgently needed.

In order to perform these operations, conventionally, a cylinder with a bottom is divided into two halves 1a, 1 as shown in FIG.
b is connected with a hinge 2 and a flange 3, and an open-top work box 1 with cylindrical floats 4, 4... attached to the outer circumferential surface is used, and this is attached to an underwater steel pipe pile 5 with the required water drop. , Drain the inside to dry the part of the underwater steel pipe pile 5 above the tidal zone, and carry out anti-corrosion treatment of the underwater steel pipe pile 5 in the work box 1.
Performed maintenance and repair work (Jetko Kouko 46-4190
issue).

(Problems to be solved by the invention) In such a conventional work box, floats are simply attached to the outer surfaces of each of the halves 1a and 1b, and the work of attaching the boxes to the underwater steel pipe piles 5 is carried out by floating them above the water. Therefore, the height relative to the underwater steel pipe pile 5 during installation work will change depending on the tide level, and in order to install it at the desired height, either wait until the required tide level is reached, or apply a load. It required work such as sinking it or lifting it up using jacks or a crane, which caused problems with workability.

In addition, since the outer circumference of the work box was made of a single layer, if a floating object or the like collided with the work box during work, water would immediately enter the work box, making the work highly dangerous.

In view of these conventional problems, the present invention aims to provide a work box for underwater steel pipe piles that is easy to work with during installation and is highly safe after installation.

(Means for solving the problem) The gist of the present invention to achieve the above-mentioned purpose is to combine a plurality of vertically divided units each having a bottomed cylindrical shape vertically divided into a bottomed cylindrical shape. It is assembled, has a steel pipe pile insertion hole in the center of the bottom plate through which the underwater steel pipe pile is inserted while keeping it watertight, and is provided with pile holding means for holding the underwater steel pipe pile inserted into the steel pipe pile insertion hole inside. In the working box for underwater steel pipe piles, the peripheral wall portion of the vertically divided unit is made into a double wall, and a float tank is formed between the double walls, and water can be freely poured into the float tank, and the vertical A part of the split units is hinged,
The work box for underwater steel pipe piles is characterized in that it can be opened and closed freely around the hinge joint part.

(Function) When using this submersible steel pipe pile work box, the inside of the float tank is filled with water to adjust the buoyancy and the entire work box is at the desired height.The double vertically divided unit is opened around the hinge, and the new Alternatively, after moving it so as to cover the outside of the existing steel pipe pile, close both vertically divided units, insert the steel pipe pile into the center of the work box, and clamp and fix it. After that, the water in the work box is drained to create a dry work space, where work such as rust prevention, corrosion prevention, and reinforcement of the underwater steel pipe piles is carried out.

(Example) Next, an example of the present invention will be described with reference to the drawings.

As shown in FIG. 1, this work box has a cylindrical case 10 with a bottom. This box 10 is divided into two vertically divided units 11, 1.
1 are connected to each other by a hinge 12 at one side edge so as to be openable and closable. Double vertical division unit 1
Although not shown in the figure, between 1 and 11, they are connected to each other with watertightness through a water-stop gasket, and the opposite edge of the hinge 12 can be opened by fixing means such as bolting. By tightening, the bottomed cylindrical form is maintained.

Each vertically divided unit 11, 11 has its outer peripheral wall 11a.
An inner circumferential wall 11b is provided concentrically on the inside of the tank to form a double wall structure, and a float tank 13 is formed between both walls 11a and 11b. A submersible pump 14 is installed in each of the float tanks 13, and the lower end of the pump piping 15 is connected to each submersible pump 14, and the submersible pump 14 is operated to pump the inside of the float tank 13 through the pump piping 15. I'm trying to drain it.

As shown in FIG. 2, hydraulic cylinders 17 are provided radially at the bottom of the top-open working chamber 16 formed by the inner circumferential wall 11b and the bottom wall 11c, and the hydraulic cylinders 17 are provided at the inward ends. The work box 10 is attached to the underwater steel pipe pile 5 by tightening the underwater steel pipe pile 5 with a chuck part 19 equipped with a packing 18.

When using the work box for underwater steel pipe piles constructed in this way, each submersible pump 14 is operated near the underwater steel pipe pile 5 to which the work box is to be attached, and the float tank 13 is filled with water to adjust the buoyancy. and levitate to the desired height. In this state, the vertically divided units 11, 11 are opened and moved around the hinge 12, and the underwater steel pipe pile 5 is inserted between both vertically divided units 11, 11. Thereafter, both vertically divided units 11, 11 are closed, each hydraulic cylinder 17 is operated to tighten the underwater steel pipe pile 5 by the chuck portion 19, and the work box 10 is fixed to the pile 5.
After drying, the water in the work box 10 is drained to form a dry work chamber 16.

In addition, both vertically divided units 11, 11 of the work box 10
As shown in FIG. 3, a hydraulic cylinder 20 may be interposed between the two vertically divided units 11, 11 at the back of the hinge 12, and the opening/closing operation may be performed by expanding and contracting the hydraulic cylinder 20. be.

(Effect of the invention) The work box for underwater steel pipe piles of the present invention is constructed as described above, and the peripheral wall of the vertically divided unit is doubled to form a float tank, and water can be freely poured into the tank to adjust the buoyancy. This makes it easier to adjust the height when attaching to underwater steel pipe piles, improving work efficiency. At the same time, even if a ship collides with a work box being worked on inside, it will not immediately invade the work room. This reduces the amount of water spilled and improves safety.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an embodiment of the present invention, FIG. 2 is a plan view of the chuck portion, FIG. 3 is a perspective view of another embodiment, and FIG. 4 is a perspective view of a conventional example. 5... Underwater steel pipe pile, 10... Box, 11... Vertical division unit, 11a... Outer peripheral wall, 11b... Inner peripheral wall, 12... Hinge, 13... Float tank,
14... Submersible pump, 15... Pump piping.

Claims (1)

[Scope of utility model registration request] It is assembled into a cylinder with a bottom by combining a plurality of vertically divided units in the shape of a vertical cylinder with a bottom, and has a steel pipe pile insertion hole in the center of the bottom plate through which an underwater steel pipe pile is inserted while maintaining watertightness. In the work box for underwater steel pipe piles, the work box for underwater steel pipe piles is provided with a pile holding means for holding the underwater steel pipe pile inserted into the steel pipe pile insertion hole, wherein the peripheral wall portion of the vertically divided unit is a double wall, and the double wall is A float tank is formed between the walls, water can be freely poured into the float tank, and a part between the vertically divided units is hinged, and the float can be opened and closed around the hinge joint. A work box for underwater steel pipe piles.