JP3790984B2 - Underwater installation method and apparatus for sheet-like material - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an underwater installation method and apparatus for a sheet-like material to be laid on the bottom of a water for, for example, water shielding necessary for a bottom bottom sand-capping method.
[0002]
[Prior art]
In general, sheets such as water shielding sheets for preventing sucking of rubble foundations for underwater structures such as breakwaters, preventing sediment runoff from underwater structures, and bag materials used as containers for placing concrete on the bottom of the water A shape is laid on the bottom of the water.
[0003]
Conventionally, when this type of sheet-like material is laid on the bottom of the water, it is sunk in the bottom of the water in a folded state so as not to be washed away, and is developed by a diving operation by a diver and moved to a predetermined position for positioning.
[0004]
As another method, a method is adopted in which a sheet-like object with a weight is wound around a drum at the rear of the work boat and is set in a predetermined position while moving.
[0005]
[Problems to be solved by the invention]
However, in the conventional techniques as described above, the work of unfolding and moving the sheet-like material at the bottom of the water has a great resistance, so that a method that relies on manual work by a diver would impose heavy labor on the diver. There is a problem that workability is poor and many workers are required, and the cost is inevitably high.
[0006]
Further, in the case of sunk by a work ship, there is a problem that wrinkles and uneven loads are likely to occur on the seat, and it is difficult to install at a precise position.
[0007]
The present invention has been made for the purpose of installation at an accurate position and improvement of construction quality in view of such a state of the art.
[0008]
[Means for Solving the Problems]
The feature of the underwater installation method of the sheet-like material according to the present invention for solving the conventional problems as described above and achieving the intended purpose is that the sheet-like material to be installed in the water such as the bottom of the water has an internal A water injection bag that expands into a predetermined shape by injecting water and expresses shape retention and a floating bag that expresses buoyancy by injecting gas are attached integrally or detachably, and water is added to the water injection bag. Injecting gas into the floating bag, the sheet-like material is expanded to a predetermined shape and floated, and in that state, moved to a sheet-like material installation position , according to the installation of the sheet-like material. A plurality of sinking sinkers installed on the bottom surface of the water, a guide rope that is fixed to the sinking sinker at the lower end and is fixed to the float or the like and is tensioned in the vertical direction, and attached to the sheet-like object Using a settling means having a number of engagement hooks, the engagement hook is engaged with the guide rope, and the floating bag is removed or the gas in the floating bag is discharged to reduce buoyancy. In this state, the sheet-like object is sunk at an installation position along the guide rope .
[0009]
In addition, after the sheet-like material is set, it is preferable that the sheet-like material is pulled evenly from each direction so that the sheet-like material is stretched.
[0010]
In addition, the feature of the underwater installation device for sheet-like material according to the present invention is that the sheet-like material to be installed in water such as the bottom surface of water is inflated into a predetermined shape by injecting water into the inside and expresses shape retention. A water injection bag and a floating bag that expresses buoyancy by injecting gas are integrally or detachably attached, and water is injected into the water injection bag, and gas is injected into the floating bag, respectively. And a moving means for moving the sheet-like object to a sheet-like object installation position and a sinking means for sinking the sheet-like object, the setting means comprising a sheet-like object. A plurality of sinkers for sinking installed on the bottom of the water in accordance with the installation of the guide rope, a guide rope that has a lower end fixed to the sinking sinker and an upper end fixed to a float, etc. And a plurality of engagement hooks attached to sheet, the guide rope engaged with the engaging hook, that has been adapted to sinking the installation position of the sheet along the guide rope is there.
[0011]
Incidentally, after the sinking of the sheet, it is preferable with a stretched means pulling the sheet evenly from each direction, stretched means comprises a stretched for sinker disposed around the sheet,該展Zhang A spreading wire with a turnbuckle connecting the sinker and the edge of the sheet-like material, and connecting the edge of the sheet-like material to the spreading sinker with the spreading wire, and the turnbuckle It is preferable that the sheet-like material is stretched by tightening.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of a sheet-like underwater installation device according to the present invention will be described with reference to FIGS.
[0013]
1 to 3 show an embodiment in the case of installing a sheet-like object composed of a water-impervious sheet for vacuum consolidation. In the figure, 1 is a sheet-like object to be laid on the bottom of the water, 2 is a water injection bag Reference numeral 3 denotes a floating bag, and a water injection bag 2 and a floating bag 3 are detachably attached to the sheet-like material 1 in advance.
[0014]
A plurality of stretching wires 5, 5... Are attached to the peripheral edge of the sheet-like object 1 as the stretching means 4, and the leading ends of the stretching wires 5 are previously installed at predetermined positions on the water bottom. It is adapted to be locked to the sinker 6 for use. Further, a turnbuckle 5a is interposed in the extending wire 5, and the sheet-like object 1 is stretched by tightening the turnbuckle 5a with the wire tip engaged with the extending sinker 6. Be able to.
[0015]
The water injection bag 2 is formed in a hollow bag shape by a material mainly composed of a flexible material such as rubber, synthetic rubber, or an impermeable canvas sheet, and is inflated by pouring water into the bag to maintain a predetermined shape. It has a structure. The water injection bag 2 is inflated and developed into a predetermined shape, and is attached to the sheet-like product 1 so that the sheet-like product 1 is developed into a predetermined shape by this deployment force.
[0016]
Further, a plurality of engagement hooks 7, 7... Are attached to the peripheral edge portion of the water injection bag 2 via ropes 8, 8. ing.
[0017]
The floating bag 3 is formed into a hollow bag shape by a material mainly composed of a flexible material such as rubber, synthetic rubber, or an impermeable canvas sheet, and can float by injecting gas into the bag. It is like that.
[0018]
Next, the underwater installation method for the sheet-like material according to the present invention will be described.
[0019]
First, as shown in FIG. 4, water is injected into the water injection bag 2 and gas is injected into the floating bag 3 into the water injection bag 2 and the floating bag 3 attached to the sheet 1, respectively. Thus, the sheet-like object 1 is expanded into a predetermined shape, and the shape is maintained as it is, and is floated by the buoyancy of the floating bag 3. In this state, the boat is moved by the moving ship 10 and moved to the installation position.
[0020]
Next, as shown in FIG. 5, a plurality of sinking sinkers 11, 11,... Are installed around the laying position, and the lower end of the guide rope 9 is attached to the sinking sinker 11 and the upper end is attached to a float 12 such as a buoy. To make it tense up and down. The engagement hook 7 is engaged with the guide rope 9 to adjust the installation position of the sheet-like object 1.
[0021]
Next, as shown in FIG. 6, the gas in the floating bag 3 is discharged to reduce the buoyancy, and the sheet-like object 1 is sunk downward along the guide rope 9 with a winch 14 or the like mounted on the work boat 13. .
[0022]
When set to the predetermined position, as shown in FIG. 7, the rope for extension attached to the peripheral portion of the sheet-like object 1 on the plurality of extension sinkers 6, 6... The tip of 5 is locked by a diver's manual work, the turnbuckle 5a interposed in the expansion rope 5 is tightened, and the sheet wire 1 is stretched by applying tension to the expansion wire 5. .
[0023]
When the laying operation is completed, as shown in FIG. 8, the water is discharged from the water injection bag 2, the water injection bag 2 and the floating bag 3 are removed from the sheet-like material 1, and the installation operation is completed as shown in FIG. . The water injection bag 2 and the floating bag 3 are collected and reused.
[0024]
The water injection bag 2 may be fixed to the sheet-like object 1 in a non-removable manner depending on the use of the sheet-like object. After installation, the water is removed and the sheet 1 is installed on the bottom of the water.
[0025]
Similarly, the floating bag 3 may be fixed to the sheet-like material so as not to be removed, and may be installed on the bottom of the water together with the sheet-like material 1 in a state where the gas is completely removed.
[0026]
Moreover, although the above-mentioned Example demonstrated laying | laying of the water-impervious sheet, even if it exists in the bag material used as a formwork when concrete anchors are cast in the water bottom, it can be similarly deployed and installed.
[0027]
【The invention's effect】
As described above, the underwater installation method for a sheet-like material according to the present invention expands to a predetermined shape by injecting water into the sheet-like material to be installed in the water such as the bottom surface of water, and expresses shape retention. The water injection bag and the floating bag that expresses buoyancy by injecting gas are attached integrally or detachably, water is injected into the water injection bag, and gas is injected into the floating bag, respectively, to form the sheet A state in which an object is expanded and floated to a predetermined shape, moved to a sheet-like object installation position in that state, and the buoyancy is reduced by removing the floating bag or discharging the gas in the floating bag By sunk the sheet-like material at the installation position, the work can be performed without relying on many divers, and the workability is improved and the cost is reduced. There hardly wrinkles, can be suitably laid.
[0028]
In addition, a plurality of sinking sinkers installed on the bottom of the water in accordance with the installation of the sheet-like material, and a guide rope that is tensioned in the vertical direction by fixing the lower end to the sinking sinker and fixing the upper end to a float or the like. By setting the sheet-like material along the guide rope, the sheet-like material can be installed at an accurate position.
[0029]
In addition, after the sheet-like material is set, the sheet-like material is pulled evenly from each direction so that the sheet-like material is stretched, so that wrinkles and uneven loads can be prevented.
[0030]
As described above, the underwater installation device for a sheet-like material according to the present invention expands to a predetermined shape by injecting water into the sheet-like material to be installed in the water such as the bottom surface of water, and exhibits shape retention. The sheet-like material is formed by injecting water into the water injection bag and gas into the floating bag. A moving means for moving the sheet-like material on a sheet-like material installation position, and a sinking means for sinking the sheet-like material, wherein the sheet-like material is placed at the installation position. As a result, there are few metal parts in the entire device, and the weight of the device does not become excessive even if it is a wide sheet, and it becomes difficult to damage the sheet-like material. Ri, also without requiring a lot of divers, the cost can be reduced with improved workability.
[0031]
In addition, the sinking means includes a plurality of sinking sinkers installed on the bottom of the water in accordance with the installation of the sheet-like material, and a guide that is vertically tensioned by fixing the lower end to the sinking sinker and fixing the upper end to a float or the like. A rope and a plurality of engagement hooks attached to the sheet-like object, the engagement hook being engaged with the guide rope, and the sheet-like object being set along the guide rope Therefore, accurate installation work can be performed.
[0032]
In addition, wrinkles and uneven loads can be prevented by providing a stretching means for pulling the sheet-like material evenly from each direction after the sheet-like material is set.
[0033]
Further, the extending means includes a spreading sinker arranged around the sheet-like object, and a spreading wire having a turnbuckle connecting the spreading sinker and the edge of the sheet-like object. By connecting the edge of the sheet-like material to the spreading sinker with a wire for use and tightening the turnbuckle to make the sheet-like material stretched, the stretching work is easily and suitably performed. be able to.
[Brief description of the drawings]
FIG. 1 is a plan view showing an example of a sheet-like material used in the present invention.
FIG. 2 is a sectional view showing a developed state of the above.
FIG. 3 is a plan view showing an installation state of a sheet-like material used in the present invention.
FIG. 4 is an explanatory side view showing a towing state according to the present invention.
FIG. 5 is an explanatory side view showing the installation state of the sunk device;
FIG. 6 is an explanatory side view showing the installation state of the above.
FIG. 7 is an explanatory side view showing a state in which the extension device is installed.
FIG. 8 is an explanatory side view showing the stretched state of the above.
FIG. 9 is an explanatory side view showing the installation state of the above.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Sheet-like object 2 Water injection bag 3 Floating bag 4 Expansion means 5 Expansion wire 5a Turn buckle 6 Expansion sinker 7 Engagement hook 8 Rope 9 Guide rope 10 Moving ship 11 Sinking sink 12 Floating 13 Work ship 14 Winch

Claims (5)

A water injection bag that expands into a predetermined shape by injecting water into a sheet-like object to be installed in water such as the bottom of the water, and a floating bag that expresses buoyancy by injecting gas. Are attached to the water bag, water is injected into the water injection bag, gas is injected into the bag for floating, and the sheet-like material is expanded and floated to a predetermined shape. A plurality of sinking sinkers installed on the bottom of the water in accordance with the installation of the sheet-like object, and the lower end is fixed to the sinking sinker and the upper end is fixed to the float or the like in the vertical direction. Using a settling means comprising a tensioned guide rope and a plurality of engaging hooks attached to the sheet-like material, and engaging the engaging hook with the guide rope, The bag can with gas was drained state with reduced buoyancy in bag can remove or該浮, of a sheet comprising as characterized by sinking the installation position of the sheet along the guide rope Underwater installation method.   The method for installing a sheet-like material in water according to claim 1, wherein after the sheet-like material is set, the sheet-like material is pulled evenly from each direction so that the sheet-like material is stretched. A water injection bag that expands into a predetermined shape by injecting water into a sheet-like object to be installed in the water such as the bottom of the water, and a floating bag that expresses buoyancy by injecting gas. The sheet-like material is expanded and floated to a predetermined shape by injecting water into the water injection bag and gas into the floating bag, respectively, so that Moving means for moving the sheet-like material, and sinking means for sinking the sheet-like material, the sinking means, a plurality of sinking sinkers installed on the bottom of the water in accordance with the installation of the sheet-like material, A guide rope having a lower end fixed to the sinking sinker and an upper end fixed to a float or the like and tensioned vertically, and a plurality of engagement hooks attached to the sheet-like object The guide ropes engaged with the engaging hook, underwater installation of a sheet which is adapted to sinking the installation position of the sheet along the guide rope.   The underwater installation device for a sheet-like material according to claim 3, further comprising a stretching means for pulling the sheet-like material uniformly from each direction after the sheet-like material is set.   The spreading means includes a spreading sinker arranged around a sheet-like object, and a spreading wire having a turnbuckle connecting the spreading sinker and an edge of the sheet-like article, the spreading wire The underwater installation device for a sheet-like material according to claim 4, wherein an edge portion of the sheet-like material is coupled to the spreading sinker and the sheet-like material is stretched by tightening the turnbuckle. .

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