KR20080065333A - Caisson device for under water structure - Google Patents

Abstract

A caisson device for an underwater structure is provided to control the buoyancy of a housing according to changes in the sea water level at high tide or low tide by installing a ballast tank to the bottom of a housing, to move a housing conveniently without using heavy equipment, and to assemble and disassemble housings rapidly by forming two housings to rotate on a hinge. A caisson device for an underwater structure includes two housings(10) manufactured in the identical structure and coupled with each other by bolts by surrounding an underwater structure(P) at a certain distance from the outside diameter of the underwater structure, wherein a working space(22) is formed to the inside of the housing as much as the distance from the underwater structure and used for a worker to execute maintenance work for the underwater structure, and many support frames are installed between the housing and the underwater structure horizontally to fix the housing on the underwater structure to prevent the housing installed to the underwater structure from shaking or moving by waves or other external stress, and a rubber pad is installed to the end of the support frame contacted with the underwater structure to prevent the support frame from slipping. In addition, a ballast tank(24) is formed to the inside of the housing to prevent the housing installed on the underwater structure from floating or descending artificially, as a device for making seawater flow inward according to the movements of a valve and a pump(30) installed to the housing or discharging the seawater to the outside, thereby controlling the buoyancy of the housing, wherein a rubber packing(25) is installed to the inside of the ballast tank to cut off a gap between the underwater structure and the inside of the ballast tank and to prevent the leakage of seawater to the housing, and a bilge well(32) is formed on the outer circumferential surface of a partition plate(20) formed on one of the housings to store up waste water standing on the bottom of the working space and provided with an auxiliary flexible hose(34) connected to the pump to discharge the stored waste water by the pump.

Description

Caisson device for construction of coastal underwater structures

The present invention relates to a caisson device for the construction of underwater structures, and more particularly, by installing a ballast tank on the bottom surface of the housing to adjust the buoyancy of the housing according to the change in the sea level during high tide or low tide, and additional heavy equipment The present invention relates to a caisson device for construction of a coastal underwater structure which enables the housing to be moved even when not in use.

In general, bridges that support bridges at sea are one of the representative underwater structures, which are usually made of concrete or steel pipe piles.

However, the above-mentioned underwater structures require frequent repairs due to corrosion, wear, or erosion in the process of prolonged exposure to seawater, but these repairs are difficult to precisely work as most of them are underwater. There was a problem that work and construction could not be performed smoothly because the work time waiting, air delay, cost increase due to the difference between sea water.

Therefore, in recent years, a caisson device is installed around the underwater structure to proceed with the repair work.

1 is a view showing a conventional caisson device for general underwater structure construction.

As shown, the conventional caisson device for underwater structure construction consists of a housing 110 which is separated into two and is installed in a state surrounding the circumferential surface of the underwater structure (P), the working space 120 in the housing 110 After removing the existing seawater to make the dry state, and put the worker into the working space 120 to perform the maintenance work.

However, the housing 110 constituting the conventional underwater structure caisson device is made of a metallic material in consideration of durability, and thus the housing 110 of the metallic material 110 in the process of assembling and dismantling the housing 110 to the underwater structure (P). ) Has a disadvantage in that the work is difficult and cumbersome as the assembly and dismantling of the housing 110 must be performed by mobilizing a separate crane equipment by its own weight.

In particular, the sea level (S) of the sea surface is different at the time of high tide and low tide, so that the housing 110 installed in the underwater structure (P) is artificially floated by buoyancy as much as the level at high water On the contrary, at low tide, it does not receive the buoyancy of the reduced level, so that it cannot bear its own weight and artificially fall.

An object of the present invention for solving the problems as described above, by installing a ballast tank on the bottom surface of the housing to adjust the buoyancy of the marine underwater structure construction caisson device that can adjust the buoyancy of the housing according to the water level change during high tide or low tide In providing.

Another technical problem to be achieved by the present invention is to provide a caisson device for the construction of a coastal underwater structure to move the housing conveniently even without using a separate heavy equipment.

Another technical problem to be achieved by the present invention is to provide a caisson device for constructing a coastal underwater structure that can quickly perform the assembly and disassembly work of the housing by configuring the two housings to rotate around the hinge.

According to an aspect of the present invention, there is provided a caisson apparatus for constructing an underwater aquatic structure, comprising two housings which are installed to surround the underwater structure at a predetermined distance from an outer diameter of the underwater structure. The work space and the ballast tank are respectively formed in between, and the ballast tank is characterized in that the buoyancy of the housing can be adjusted by allowing the seawater to flow in and out according to the driving of the valve and the pump installed in the housing. It is done.

A hinge is fastened to one side of the two housings, and the housings are pivotally rotated around the hinge to be configured to be open to the outside or to be pressed inward.

On the outer peripheral surface of the diaphragm formed in any one of the housings, it is preferable that the bilge well for storing sewage accumulated in the housing is recessed.

On the other hand, the underwater structure to be described below refers to the steel pipe pile or concrete pile corresponding to the piers.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

2 to 4 are views showing the configuration of the caisson device for the construction of marine underwater structures to be implemented in the present invention.

As shown, the caisson device for construction of marine underwater structures includes two housings 10.

The housings 10 are manufactured in the same structure and are bolted to each other in a state in which the underwater structure P is wrapped to be spaced apart from the outer diameter of the underwater structure P by a predetermined distance. At this time, the interior of the housing 10 forms a workspace 22 as much as the distance from the underwater structure (P), the operator is put into the workspace 22 to maintain the maintenance of the underwater structure (P) The construction will be carried out. In addition, a plurality of support frames 36 are horizontally installed between the housing 10 and the underwater structure P, and the support frames 36 are installed in the underwater structure P by waves or other external stresses. The housing 10 is fixed on the underwater structure P so that the 10 does not shake or flow. As the support frame 36 used here, it is most preferable to use a turnbuckle. In addition, it is preferable to prevent the sliding of the support frame 36 by installing a rubber pad 38 at the end of the support frame 36 in contact with the underwater structure (P).

Representing the structure of one housing 10 of the two housings 10, the housing 10 has a semi-cylindrical shape, the top of which is open and the bottom of the housing 10 is closed.

The distal end of the housing 10 is formed to be bent at an angle to the expansion pipe 12 outward, this expansion pipe 12 is the sea water due to the wave in the working process to the working space 22 in the housing 10 To prevent inflow.

On the expansion portion 12 of the housing 10, a pad eye 14, which is a binding means for connecting the housing 10 with the land and a rope (not shown), is further provided.

In addition, flanges 16a and 16b are further extended at both ends of the housing 10, respectively, and the flanges 16a and 16b are provided when the two housings 10 are installed at the outer diameter of the underwater structure P. The flanges 16a and 16b formed at both ends of the surface 10 are in surface contact with each other and fastened by bolts to couple the two housings 10. At this time, it is preferable to further install the rubber packing 17 on the front surface of each flange (16a, 16b) so that sea water does not leak between the contact surface in the surface contact process with the other flange (16a, 16b).

Steps 15 are further provided on the inner circumferential surface of any one of the housings 10.

Meanwhile, hinges 18 are fastened to one of the flanges 16a which are in surface contact with each other, as shown in FIG. 4, and the two housings 10 rotate around the hinge 18 and open outwardly. It can be easily assembled or disassembled on the underwater structure (P).

That is, the housing 10 of the present invention is not a structure in which the two are completely separated as in the prior art, by fastening the hinge 18 to the flange 16a which is in surface contact with each other at one end of the two housings 10, the hinge ( 18) is rotated about the center of the assembly, during the assembly operation, the two housings 10 fastened to the hinge 18, the outwardly open position in the underwater structure (P), and then inwardly fold the flanges at both ends By assembling the bolt to (16a) it is possible to perform the assembly work, and also to be able to perform the disassembly work only by the fastening of the bolt can realize the ease of assembly and disassembly work.

On the other hand, in the housing 10 having the above-described configuration, the work space 22 and the ballast tank (Ballast Tank) 24 are each formed with the diaphragm 20 therebetween.

The ballast tank 24 adjusts the buoyancy of the housing 10 by introducing seawater or by discharging the introduced seawater to the outside according to the operation of the valve 26 and the pump 30 installed in the housing 10. As a means, the housing 10 installed on the underwater structure P through the ballast tank 24 is not artificially raised or lowered.

In general, the sea level is the difference between the water level (S) occurs during high tide and low tide, the housing 10 installed in the underwater structure (P) due to the high water level during the high tide will rise, and also reduced during low tide The water level causes the housing 10 to be lowered by its own weight. As such, when the position of the housing 10 is changed up and down on the underwater structure P according to the high tide and the low tide, the housing 10 may not be installed at a loading place to be maintained and repaired. Therefore, the present invention can lower the buoyancy of the housing 10 through the weight of the seawater by introducing the seawater into the ballast tank 24 during high water to prevent the housing 10 from rising, the ballast tank ( By discharging the seawater stored in the 24 to the outside to minimize the weight of the housing 10 to increase the buoyancy to prevent the falling of the housing 10.

In addition, the ballast tank 24 is used for convenience of movement when assembling and disassembling the housing 10. That is, the housing 10 is submerged in water according to its own weight, so when moving the housing for assembly and disassembly, the housing must be transported in a lifted state using heavy equipment such as crane, but the present invention By discharging the seawater in the ballast tank 24 to the outside to increase the buoyancy of the housing 10 as much as possible, the housing 10 floats on the water surface, even if no separate heavy equipment is used.

A rubber packing 25 is installed on an inner surface of the ballast tank 24, and the rubber packing 25 blocks a gap between the underwater structure P and the inner surface of the ballast tank 24 during the assembly process, thereby preventing the gap between the housing 10. Work space 22 is prevented from leaking sea water.

Meanwhile, a valve 26 and a pump 30, which are means for forcibly introducing or discharging seawater into the ballast tank 24, are installed in the housing 10.

The valve 26 automatically operates according to a signal of a controller (not shown) when the inflow of seawater is required in the state of being installed on the bottom surface of the housing 10, and introduces the seawater into the tank 24.

The pump 30 is connected to the flexible hose 28 installed in the ballast tank 24, when the discharge of sea water is required, it is automatically driven in accordance with the signal of the controller and pumping seawater inside the ballast tank 24 To be forced out.

On the other hand, a bilge well 32 is recessed in the outer circumferential surface of the diaphragm 20 formed in any one of the housings 10 described above. The bilge well 32 stores the sewage collected when the waves or rainwater introduced into the housing 10 during construction are collected on the bottom of the work space 22. In addition, the bilge well 32 is provided with a separate auxiliary flexible hose 34, the auxiliary flexible hose 34 is connected to the above-described pump 30 is stored through the pumping operation of the pump 30 Waste water is discharged.

Hereinafter, the operation of the caisson device for constructing the coastal underwater structure according to the present invention will be described with reference to FIGS. 5A and 5B.

5A and 5B are views illustrating a state in which the buoyancy of the ballast tank is adjusted according to the change of the seawater level at high tide and low tide.

First, as shown in Figure 5a when the water level (S) at the time of high water is blown to drive a valve 26 through the control unit so that a certain amount of seawater into the ballast tank (24). That is, the housing 10 installed in the underwater structure (P) through the seawater introduced into the ballast tank 24 as described above is heavy due to the weight of the seawater can be lowered buoyancy, thus the water level during high water If you blow, you won't get injured.

On the other hand, when the water level (S) at the time of low water as shown in Figure 5b is driven through the control unit 30 to discharge the seawater stored in the ballast tank 24 to the outside, the housing 10 is discharged It is possible to increase the buoyancy by the amount of seawater, so that even if the water level decreases at low tide, it does not fall to its own weight.

That is, by adjusting the buoyancy of the housing 10 through the ballast tank 24 described above, the housing 10 is installed in a loading place to maintain and repair the underwater structure P regardless of the change in the water level S. I can fix it in a state.

Meanwhile, in order to assemble the housing 10 in the underwater structure P, the housing 10 must be moved to the underwater structure P. In this case, the seawater in the ballast tank 24 is discharged to the outside to provide the housing 10. By increasing the buoyancy of the maximum as the housing 10 is floating on the water surface can be easily moved even without using a separate heavy equipment such as a crane (10).

As described above, the present invention has an effect of preventing the housing from rising or falling in the underwater structure according to the change in the sea level of the water at high or low tide by adjusting the buoyancy of the housing through the ballast tank.

In addition, when assembling or disassembling the housing in the underwater structure, when moving the housing to increase the buoyancy of the housing through the ballast tank as possible to bring the housing on the water surface has the advantage that the housing can be moved more simply and conveniently.

In addition, by configuring the two housings to rotate around the hinge has a synergistic effect that can quickly perform the assembly and disassembly of the housing.

1 is a view showing a conventional caisson device for general underwater structure construction.

Figure 2 is a three-dimensional view showing the structure of the caisson device for the construction of coastal underwater structures in accordance with a preferred embodiment of the present invention.

3 is a side cross-sectional view taken along the line A-A of FIG.

4 is a cross-sectional view taken along the line B-B of FIG.

Figures 5a and 5b is a view showing a state of use of the caisson device for constructing the coastal underwater structure according to the present invention, respectively.

<Description of the symbols for the main parts of the drawings>

10: housing 20: diaphragm

22: Workspace 24: Ballast Tank

26: valve 30: pump

32: bilgewell P: underwater structure

Claims (3)

In the caisson apparatus for marine underwater structure construction, Comprising two housings are installed surrounding the underwater structure at a distance from the outer diameter of the underwater structure; A working space and a ballast tank are respectively formed in the housing with a diaphragm interposed therebetween; The bellows tank is a caisson device for marine underwater structure construction, characterized in that to adjust the buoyancy of the housing by allowing the inflow and discharge of sea water in accordance with the drive of the valve and the pump installed in the housing. The method of claim 1, A hinge is fastened to one side of the two housings, and the housing is rotated around the hinge and the caisson device for marine underwater structure construction, characterized in that it is configured to be spread outwards or to the inside. The method according to claim 1 or 2, The caisson device for marine underwater structure construction, characterized in that the bilge well for storing the sewage accumulated in the housing is formed in the outer peripheral surface of the diaphragm formed in any one of the housings.