JP5073598B2 - Installation method of water work hoe, cradle cradle, and water work hoe - Google Patents

Description

  The present invention relates to a method for installing a water work hoe, a cradle cradle, and a water work hoe, and in particular, a hoe main body provided with a deck part on which water work equipment is installed, and a hoe main body arranged on the upper part. The present invention relates to a water work hoe having a grounding leg whose lower end is placed on the water bottom, a cradle cradle, and a method for installing the water work hoe.

When conducting various surveys on the bottom of the ocean, lakes, rivers, etc., a boring work is carried out as a water work, and a boring bar is installed in this area. As such a bowl, various things are used according to the depth of the water area and the condition of the bottom of the water.
Looking at the case where the boring work is performed in a shallow water area with a depth of 3 m or less, steel rods are manufactured in advance, the manufactured rods are lifted with a crane carrier, and the crane carrier with the rods lifted is transported to the boring region position as it is. It is common to install it. In some cases, scaffolding pipes, etc. are assembled on site to install a fence.
Further, Patent Document 1 discloses that a floater can be installed on a shallow sea boring rod assembled on land so that a shallow water boring rod can be safely and easily installed on the sea without requiring a crane carrier. And towing the boring rod to the predetermined position by landing the grounding leg provided on the boring rod on the seabed. A shallow bowling dredging to be installed is disclosed.
JP-A-6-146250

However, in the conventional method of lifting and transporting steel-made dredging with a crane carrier, dredging must be manufactured individually according to the depth of the boring sea and the condition of the seabed, However, there is a problem that it cannot be installed in other boring places with different but not universal. Further, in the method of assembling the scaffolding pipe locally, it takes a lot of time to disassemble and assemble, so that there is a problem that it takes time to evacuate during relocation or in stormy weather such as a typhoon.
In addition, in Patent Document 1, a dredger assembled on land is towed to the sea area where the boring position is located with the floater floated from the seabed, but the dredger with the floater is low in stability, so stormy weather such as typhoons There is a high possibility of evacuating to a safe place in advance, and the construction period is often prolonged. Furthermore, the state of the seabed at the location where the dredger is installed varies, and it is necessary to make a dredger that fits the seabed in advance, so that the dredger that has been created cannot be used elsewhere. is there.
The present invention has been made in view of the above-described conventional circumstances, and can reduce the work time during installation and relocation, and can be easily changed to one suitable for the wave height of the sea area and the state of the sea floor at the installation point. It is an object of the present invention to provide a marine work dredger, a dredger cradle and a marine work dredger installation method.

The invention of claim 1 is made comprises a scaffold body portion having a decks section, and a grounding leg bottom is placed on the sea bed with the turret main body is placed on top, the tower body parts is configured with a plurality of scaffold members assembled stacked vertically, the scaffold members are placed at the bottom of the previous SL plurality of turret member, formed in advance be adapted to the state of the sea bed Further , the water working rod is characterized in that a grounding leg selected from a plurality of types of grounding legs is detachably attached .
The invention of claim 2 is the water working tower according to claim 1, wherein the turret main body and the grounding leg, be configured with a size and structure that can cope with past maximum wave height of the area water work is performed It is characterized by.
According to a third aspect of the present invention, in the water work hoe according to the first or second aspect, the heel main body is a heel member, a lower heel member disposed on the upper side of the grounding leg, and a heel member. an upper turret member being disposed on the upper side of the lower turret member with the deck, to be configured to include features.

According to a fourth aspect of the present invention, in the dredger for floating work according to any one of the first to third aspects, the plurality of kinds of grounding legs are fixed to a concrete foundation placed on a water bottom made of a reef. Reef grounding leg with a plate part, flat installation plate part arranged on the upper surface of the water bottom made of sand and gravel, and for gravel with a pointed part protruding from the lower part of the installation plate part and penetrating into the gravel It includes any one of a grounding leg part, a settlement prevention plate on a flat plate arranged on the upper surface of the water bottom which is sandy ground, and a sandy grounding leg part having a penetrating part penetrating into the sandy ground.
According to a fifth aspect of the present invention, in the dredger according to the fourth aspect, the settlement prevention plate of the ground contact leg for sand is arranged so as to be swingable from a closed state hanging downward to an open state projecting horizontally. It is characterized by being.
The invention according to claim 6 is a casket main body configured to have at least one heel member that has a deck portion and is assembled in the vertical direction, and the heel member disposed at the lowermost portion of the heel main body portion is an upper portion. a mounting portion for mounting a grounding leg bottom is installed in the sea bed, the tower body of the configured water working tower provided with a top with detachably attached to, to the mounting portion a turret for受架stand, characterized in that it and a leg for supporting a height that allows attachment and detachment of the grounding leg while placing the scaffold body portion.

The invention of claim 7 is configured to include a scaffold body portion having a decks unit, and a ground leg having a lower end installed in the sea bed with said tower body portion at an upper end portion is placed When transferring and installing a water work dredger to a boring place with a crane carrier, a plurality of grounding units having a plurality of types of installation part shapes prepared in advance in conformity with a plurality of kinds of states of the dredger body and the bottom of the water a leg portion, and a loading step of the scaffold body portion for stacking, and受架base for tower that can support and lift to allow detachment of the grounding leg is placed on top of the crane barge, the scaffold body portion and between the transfer step of transferring the crane barge loaded with the plurality of types of ground leg water work performing region, the installation step of installing the water working tower to the sea bed, and the loading step and placing step And the above water work dredge on the crane carrier In stand seen, the turret and placing the body portion to受架stand for the tower, assembling step of attaching the grounding legs compatible type to the state of the sea bed region installing the tower for water work assembling the tower for water work And a method for installing a water work tack.
The invention of claim 8 includes a turret body portion having a decks unit, water work constructed and a ground leg bottom is placed on the sea bed with the turret main body is placed on top in the use scaffold placed in transferring the boring point with a crane barge, the crane barge, the scaffold tower for receiving the main body portion is placed on the upper portion can be supported by lifting to allow detachment of the grounding leg should be placed in cradle, and a recovery step of recovering the crane base board lifting the water working tower installed in run region of water work, the collected the water working tower, on the受架stand for the derrick a placing step of placing, the a tower for受架bench legs removing the ground leg of the placed the turret body portion detachment process, then the area for installing the water working tower bottom of the water Attach a grounding leg of the kind that suits the situation A method of installing tower for water work, which comprises a, and re-assembly process stand.
The invention according to claim 9 includes a heel body portion having a deck portion, and a grounding leg portion in which the heel body portion is installed at an upper portion and a lower portion is installed in a water bottom, Is a water work rod characterized in that a grounding leg selected from a plurality of types of grounding legs prepared in advance according to the state of the bottom of the water is detachable.

According to the first aspect of the invention, scaffold body portion is configured to include a plurality of scaffold members assembled stacked vertically, the contact Chiashi portion is placed at the bottom of the plurality of turret member Since it is removably installed on the dredging member, the water work dredging can be divided and formed as a plurality of dredging members and grounding legs, making it easy to handle during transportation and adapting to the conditions of the installation water area The dredging member and the grounding leg portion can be selected to constitute the dredging work tack.
Further, among the plurality of dredging members, the dredging member arranged at the lowermost part is selected from a plurality of grounding legs provided with a plurality of types of structures prepared in advance in conformity with a plurality of types of water bottoms to be installed. Since the grounding legs are attached, it is possible to configure a water work rod equipped with grounding legs that are optimal for the state of the bottom of the installation water area.
According to the second aspect of the present invention, the dredging main body and the grounding leg have dimensions and a shape that can cope with the past maximum wave height of the area where the floating work is performed. Can be configured.
According to a third aspect of the present invention, the heel body portion is a heel member, which is a lower heel member disposed above the grounding leg portion, and a heel member, which is disposed above the lower heel member, and the deck portion. from configured to include an upper turret member, a having a, in addition to the ease of handling at the time of transfer, it is possible to construct a tower for water working by selecting the tower member suitable to the state of the installation water.

According to the fourth aspect of the present invention, since the grounding leg includes any one of the grounding leg for reef, the grounding leg for gravel, and the grounding leg for sandy land, the grounding optimal for the bottom of the installation water area It is possible to configure a water work rod with attached legs.
According to the invention described in claim 5 , the settlement prevention plate of the ground contact leg for sand is swingable from a closed state in which it is suspended downward by a shaft portion installed in the penetrating portion to an open state projecting horizontally. Since it is arranged, the penetrating part enters the sand, and the subsidence prevention plate comes into contact with the sand top surface in a state of extending horizontally, so that the floating work tack can be stably installed.
According to the invention of claim 6,受架stand for oar, a mounting part oar body of tower for water work is placed on top, with the tower main body is placed on the mounting portion from being configured and a leg for supporting a height that allows attachment and detachment of the contact Chiashi part, upon detachment of the ground leg of the tower main body, placing the turret body portion受架stand for derrick it can be, it is possible to easily attach and detach the grounding leg scaffold body portion.
According to the seventh aspect of the present invention, the dredging member, the floating working dred that has been disassembled into the grounding legs are transported onto the crane carriage, the assembled floating working dred is conveyed to the working water area, and assembled. In addition, it is possible to quickly install the water work hoe in the work water area, and when assembling the water work hoe, the hoe body can be placed on the cradle support base, Can be easily performed.
According to the eighth aspect of the present invention, the water work hoe can be quickly recovered from the water area where the water work has been completed. When the water work hoe is disassembled, the main work body is placed on the cradle stand. Thus, it is possible to easily replace the ground leg suitable for the next work area.
According to the ninth aspect of the present invention, the gutter body portion has a grounding leg portion selected from a plurality of grounding leg portions having a plurality of types of structures prepared in advance so as to be adapted to a plurality of types of water bottoms to be installed. Therefore, it is possible to configure a water work rod equipped with a grounding leg portion that is optimal for the state of the bottom of the installation water area.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a water working rod according to the present invention will be described in detail based on an embodiment shown in the drawings. In the following description, working dredging used mainly on the ocean will be described as an example. However, the present invention is not limited to the ocean, but can be applied to lakes and rivers in general.
FIG. 1 is a front view showing a configuration of a marine work dredger as a marine work dred according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view corresponding to line AA in FIG. 3 is an enlarged cross-sectional view of a portion B in FIG. 1 showing a marine work dredger, and FIG. 4 is an enlarged cross-sectional view of a portion C in FIG. 1 showing the structure of a gravel ground contact leg.
First, the overall structure of the offshore work rod (water work rod) 10 will be described with reference to FIG. The marine work anchor 10 according to the present example includes the anchor main body 100 and a grounding leg 401 attached to the lower end of the lower anchor member 300 constituting the anchor main body 100. The heel body 100 is assembled by stacking an upper heel member 200 and a lower heel member 300 in two upper and lower stages. As the grounding leg 401, three types of grounding leg part 500 for rock and grounding leg part 600 for sandy land are prepared in addition to the illustrated grounding leg part 401 for gravel. Any grounding leg can be selected and attached. A gravel ground contact leg 401 is attached to the offshore work anchor 10 shown in FIG. In addition, according to the state of the seabed of the sea area to be installed, it is possible to attach only the same type of grounding leg to the marine work anchor 10 or to attach a plurality of selected types of grounding leg. .
The upper eaves member 200 is composed of a cradle 210 in which two H-shaped steel members are arranged in parallel with a predetermined distance therebetween, and seven H-shaped members disposed on the upper surface of the cradle 210 so as to be orthogonal to the cradle 210. The main girder 220 made of steel and the floor plate 221 inserted between the upper surfaces of each main girder 220 constitute a substantially square deck portion 230. A handrail portion 240 surrounding the periphery of the deck portion 230 is disposed. Necessary equipment such as a boring machine is arranged on the deck unit 230. Further, connection leg portions 250 for connection to the lower collar member 300 are respectively suspended at the lower portions of the four corners of the deck portion 230.
A connecting portion 260 is formed at the lower end portion of each connecting leg portion 250. As shown in FIG. 3, the connection portion 260 connects the attachment plate portion 261 in which the insertion hole 263 into which the connection end portion 361 of the lower collar member 300 is inserted, the connection leg portion 250, and the attachment plate portion 261. And a reinforcing plate 262.

Moreover, the lower gutter member 300 includes a substantially square upper girder part 310 and a lower girder part 320 made of H-shaped steel, and the upper girder part 310 and the lower girder part 320 are at the four corners. They are connected by connecting legs 330. As shown in FIG. 1, a vertical brace member 340 is disposed between the connecting leg portions 330 facing each other.
In addition, as shown in FIG. 2, the lower girder part 320 is formed by combining four horizontal members 321, 322, 323, and 324, each of which is a pair of two steel materials arranged close to each other in parallel. Two horizontal brace members 350, 350 are formed between the horizontal member 323 and the horizontal member 324 which are formed and are opposed to each other.
Further, a connecting member 360 that connects the lower eaves member 300 and the upper eaves member 200 is erected above each upper beam portion 310. The connecting member 360 includes a connection end portion 361 inserted into the insertion hole 263 of the connection portion 260, and two H-shaped steel materials 362 and 362 that are bolted to the lower girder portion 320 across the connection end portion 361. It is prepared for.

In this example, the upper saddle member 200 and the lower saddle member 300 are formed by sandwiching the mounting plate portion 261 of the connecting leg portion 250 and the horizontal portions of the H-shaped steel materials 362 and 362 of the connecting member 360 with the clamp member 270. Removably connected.
Here, the upper dredging member 200 and the lower dredging member 300 are designed and manufactured to have dimensions and structures that can cope with the ocean current, wind speed, and past maximum wave height in the sea area where the dredging is installed.
In addition, leg attachment portions 370 to which the gravel ground contact legs 401 are connected are suspended from the four corners of the lower rod member 300. As shown in FIG. 4, the leg attachment portion 370 is composed of a hanging portion 371 made of an H-shaped steel material and an attachment plate 372 arranged at the lower end of the hanging portion 371.
In this example, a gravel ground contact leg 401 is assembled to the lower part of the leg attachment part 370. As described above, as the grounding leg 400, there are predetermined ones adapted to the state of the seabed in the boring sea area from the grounding leg for rocky gravel 401 and the grounding leg for rocky reef 500 and the grounding leg for sandy ground 600. Is selected.

Next, the grounding leg will be described. FIG. 4 is an enlarged cross-sectional view of a portion C in FIG. 1 showing the structure of the gravel ground contact leg. The gravel ground contact leg 401 includes a leg 410 attached to the leg attachment 370, a base 420 arranged below the leg 410, and a flat plate fixed to the lower end of the base 420 and arranged on the upper surface of the seabed gravel. The installation board part 430 of the shape and the pointed part 440 which protrudes from the lower part of the installation board part 430, and penetrates into the gravel are provided. The leg portion 410 is formed by fixing a top plate 412 and a bottom plate 413 to the upper and lower end surfaces of the main body 411 made of H-shaped steel. Here, the length dimension of the leg portion 410 is determined in consideration of the water depth and the inclination of the seabed. In the example shown in FIG. 1, the dimensions of the left and right leg parts 410 and 410 are changed in accordance with the inclination of the seabed B. I am using something.
As for the base 420, the top plate 422 is being fixed to the main body 421 comprised with the H-type steel material with the volt | bolt. Note that the leg mounting portion 370 and the leg portion 410 are detachably fixed to each other with a bolt nut 380, and the leg portion 410 and the base portion 420 are detachably fixed to each other with a bolt nut 450.
Further, the pointed portion 440 has four right-angled triangular steel plates 441 to 444 (443 not shown), and the bottom is attached to the bottom side of the installation plate 430, and the other bottom is cross-shaped. It is configured to be joined.
In order to install the offshore work dredge 10 using such a gravel ground contact leg 401, the offshore work dredge 10 is suspended in the sea using a crane as will be described later, and the gravel ground contact leg 401 is attached. Land on the seabed B. Then, the pointed portion 440 of the gravel ground contact leg 401 penetrates into the gravel and the installation plate 430 is placed on the surface of the gravel. Thereby, the marine work anchor 10 can be stably installed on the seabed B.

FIG. 5 is a front view showing the structure of the ground contact leg 500 for reefs. The ground contact leg portion 500 for the reef includes a leg portion 510 attached to a lower portion of the leg portion attaching portion 370, a base portion 520 disposed below the leg portion 510, and a flat installation plate portion fixed to the lower end of the base portion 520. 530. The base portion 520 and the installation plate portion 530 are joined by an attachment reinforcing plate 570. Moreover, the installation board part 530 is fixedly arranged by the anchor volt | bolt 560 embed | buried under the concrete base | substrate 540 laid in the seabed reef.
The leg 510 is formed by welding a top plate 512 and a bottom plate 513 to a main body 511 made of an H-shaped steel material. The length of the leg 510 is determined in consideration of the water depth, the seabed inclination, and the like.
In the base 520, a top plate 522 is configured by bolts and nuts on a main body 521 configured by H-shaped steel. In addition, the leg part attaching part 370 and the leg part 510 are detachably fixed by a bolt nut 380, and the leg part 510 and the base part 520 are detachably fixed by a bolt nut 550.
In order to install the marine work anchor 10 using such a ground contact leg 500 for the reef, the marine work anchor 10 is suspended in the sea using a crane as will be described later. The installation board part 530 is arrange | positioned on the concrete base | substrate 540 installed in the seabed B. FIG. And the installation board part 530 and the concrete base 540 are screwed and fixed to the anchor bolt 560. As a result, the marine work anchor 10 can be stably installed on the seabed B.

FIG. 6 is a front view showing the structure of the ground contact leg for sand. The ground contact leg for sand 600 includes a leg 610 attached to a lower part of the leg attachment 370, a base 620 disposed below the leg 610, an installation 630 fixed to a lower end of the base 620, and an installation. The penetration part 650 extends below the part 630 and penetrates into the seabed sand, and the settlement prevention part 640 installed in the installation part 630.
The leg part 610 is formed with a top plate 612 and a bottom plate 613 by bolts and nuts on the upper and lower surfaces of a main body 611 made of H-shaped steel. The length of the leg portion 610 is determined in consideration of the water depth, the seabed inclination, and the like. Since the leg 610 is the same as the leg 410 of the gravel ground contact leg 401 and the leg 510 of the reef ground contact leg 500, various lengths are prepared as common ones, and the water depth, etc. It can be selected and used according to.
The base portion 620 is configured by welding a top plate 622 to a main body 621 made of an H-shaped steel material. Note that the leg attaching portion 370 and the leg portion 610 are detachably fixed by a bolt nut 380, and the leg portion 610 and the base portion 620 are detachably fixed by a bolt nut 660.
The installation part 630 is configured such that a projecting part 632 is formed in a horizontal direction from a main body 631 made of a steel material, and a shaft part 633 of the settlement preventing part 640 is formed. The subsidence prevention part 640 is pivotally supported by the shaft part 633 and is arranged to be swingable from a closed state (D in the figure) suspended downward to an open state (E in the figure) projecting horizontally. Is provided. The sinking prevention plate 641 is pivotally supported by the shaft portion 633 by the mounting portion 642 at the base, and a weight 643 is disposed at the tip. The subsidence prevention plate 641 is disposed on the surface of the sand when the marine work dredger 10 is installed, and prevents the sand ground contact leg 600 from subsiding into the sand. Positioned.

Further, the penetrating portion 650 is configured by disposing a positioning member 662 in a closed state of the sinking prevention plate 643 on a main body 651 formed of an H-shaped steel material.
In order to install the offshore work dredge 10 using such a sandy ground contact leg 600, the offshore work dredger 10 is suspended in the sea using a crane as will be described later, and the sandy ground contact leg 600 is removed. Land on the seabed B. At this time, the subsidence prevention plate 643 descends in an open state due to the resistance of water, and the penetration portion 650 penetrates into the sand and is positioned, and the subsidence prevention plate 643 is disposed on the surface of the sandy bottom B. Sedimentation is prevented. As a result, the marine work anchor 10 is stably installed on the seabed B.
In the offshore work dredging 10 having such a configuration, the upper dredging member 200, the lower dredging member 300, the gravel grounding leg 401 constituting the grounding leg, the reef grounding leg 500, and the sandy grounding leg 600 are provided. Since the structure can be divided, the weight and volume of each part can be reduced, and handling of the transfer can be facilitated when installing and moving the offshore work rod 10 to the drilling survey site. In addition, since the grounding legs can be replaced in accordance with the conditions of the seabed, the state of the seabed is different by attaching optimal grounding legs to the same (common) upper dredging member 200 and lower dredging member 300. Can be shared at the installation site.

Next, the cradle cradle and the work of attaching the grounding leg to the heel body using the cradle cradle will be described. In this example, by placing the lower dredge member on four dredging cradles arranged on the floor of the crane carriage, the installation work and replacement work of the grounding leg can be easily performed on the crane carriage.
FIG. 7 is a view showing a state where the marine work dredger is placed on the dredger cradle. (A) is a plan view, (b) is a front view, and (c) is a front view showing the dredger cradle. is there. As shown in FIG. 7 (c), the cradle cradle 700 according to this example includes a support frame 710 assembled in a cross beam shape with H-shaped steel materials 711 and 712, four legs 720, and a brace for reinforcement. It is comprised from the member 730 and the beam material 740 arrange | positioned between the legs 720. FIG. In this example, it is configured such that the leg mounting portion 370 can be disposed inside the support frame 710 when the marine work rod 10 is placed on the rod mount 700. Moreover, the length dimension of the leg 720 is longer than the length dimension of the prepared grounding leg part.
When the grounding leg is attached to or removed from the lower part of the dredge main body 100, the dredge main body 100 is placed on the floor F of the crane carrier as shown in FIGS. 7 (a) and 7 (b). It mounts on the stand cradle 700 of a stand. As a result, a sufficient space is secured between the support frame 710 and the floor F for mounting and replacing the grounding legs, and the grounding legs can be easily mounted and replaced. . In FIG. 7, a reef ground contact leg 500 is shown as an example of the ground contact leg.

FIG. 8 is a diagram showing a state where the marine work dredger is placed on another dredger cradle. (A) is a plan view, (b) is a front view, and (c) is a front view showing the dredger cradle. FIG. 4D is a plan view showing the cradle cradle.
In this example, as shown in FIGS. 8C and 8D, the cradle cradle 800 includes a support beam 810 made up of two H-shaped steel members arranged in parallel and four legs 820. And four grounding members 830 arranged below the legs 820, a brace member 840, and a triangular leg reinforcing member 850. This dredger cradle 800 is arranged inside the leg mounting portion 370 of the marine work dredger 10.
When the grounding leg is attached to or removed from the lower part of the main body 100, the main body 100 is placed on the floor F of the crane carrier as shown in FIGS. 8 (a) and 8 (b). It is placed on the cradle cradle 800. As a result, a sufficient space is secured between the support beam 810 and the floor F for mounting and exchanging the grounding leg, and the mounting and exchanging work of the grounding leg can be easily performed. . In FIG. 8, a reef ground leg 500 is shown as an example of the ground leg.

Next, a method for installing the offshore work dredge 10 will be described. FIG. 9 is a schematic diagram showing a procedure for arranging the marine work dredger. First, an upper dredging member 200, a lower dredging member 300, a grounding leg 400 (a gravel grounding leg 401, a rocky grounding leg 500, a sandy grounding leg 600), and a dredging cradle 700 are preliminarily provided at an onshore factory. Produced. The upper dredging member 200 and the lower dredging member 300 are designed and manufactured to have dimensions and a structure that can cope with the ocean current, wind speed, and past maximum wave height in the sea area where the offshore work dredger 10 is installed.
Further, the gravel ground leg 401, the reef ground leg 500, and the sand ground leg 600 as the ground leg 400 are also manufactured according to the state of the seabed in the installation area. Here, since the leg portions 410, 510, and 610 of the respective grounding leg portions 401, 500, and 600 are used in common, if various lengths are prepared, the situation of the work site, the ground It is possible to adapt to the situation and depth slope. Note that the upper dredging member 200, the lower dredging member 300, the ground contact leg 401 for gravel, the ground contact leg 500 for reef, and the ground contact leg 600 for sand are individually processed. The upper dredging member 200 and the lower dredging member 300 of various dimensions are prepared in advance, and the working marine area is prepared from the prepared upper dredging member 200 and the lower dredging member 300. You may make it select the thing suitable for. Also, a plurality of types of ground contact legs 401 for sand and gravel, ground contact legs 500 for reefs, and ground contact legs 600 for sandy land that are suitable for the state of the seabed may be prepared, and appropriate ones may be selected.

Next, as shown in FIG. 9 (a), the upper dredging member 200, the lower dredging member 300, the gravel grounding leg 401, the reef grounding leg 500, the sandy grounding leg 600, the dredging suitable for the work site. Necessary base materials and materials such as the cradle 700, the filter unit 930, and the block 940 are loaded on the deck 920 of the 900 from the quay W by the crane 910 of the gantry 900 with a crane.
In this state, the carrier boat 900 with a crane is towed to the installation sea area. At this time, the lower eaves member 300 and the grounding leg 400 are connected by the bolt and nut 380 before arrival at the site and installation work (see FIG. 3). This attachment is performed by placing the lower eaves member 300 on the four eaves support bases 700. When the lower heel member 300 is placed on the cradle cradle 700, a sufficient space is secured between the lower heel member 300 and the floor F for replacement work, and the work can be easily performed ( (See FIG. 7).
In this example, since the work site is gravel, the ground contact leg 401 for gravel is connected to the lower dredge member 300. At this time, as described above, the gravel grounding leg 401 is connected to the lower dredge member 300 using the dredge stand 700 (see FIG. 7). When the site is reef or sand, the reef ground leg 500 or sand ground leg 600 is connected. In addition, in a state where the grounding leg is attached to the lower rod member 300, the lower rod member 300 is often not stable on the deck 920. For this reason, if it keeps mounting on the cradle stand 700 installed in four places, the lower heel member 300 can be mounted on the deck 920 stably.
When the crane-equipped carriage 900 arrives at the installation sea area, as shown in FIG. 9B, first, the lower anchor member 300 to which the gravel ground contact leg 401 is attached is suspended by the crane 910 and installed on the seabed. In this example, since the seabed is gravel, the grounding leg 401 for gravel is stably installed on the seabed B just by suspending the lower dredging member 300 from the seabed B (see FIGS. 1 and 4). .

Next, as shown in FIG. 9C, the upper rod member 200 is installed on the lower rod member 300 with the crane 910, and the upper rod member 200 and the lower rod member 300 are fixed with the clamp member 270. If necessary, the filter unit 930 is arranged around the gravel ground contact leg 401 as shown in FIG. 9D, and the block 940 is arranged as shown in FIG. 9E. This completes the installation of the offshore work dredge 10.
When the boring work is finished and the offshore work dred 10 is to be removed, moved to the next point, or when sheltered due to stormy weather, the crane 910 is used to reverse the installation procedure. 930 is removed and loaded on the deck 920, and further, the upper dredging member 200 and the lower dredging member 300 are loaded in this order on the crane-equipped carriage 900. At this time, if the lower dredging member 300 is placed on the dredging cradle 700 arranged on the deck 920, even if the length of the gravel ground contact leg 401 attached to the lower dredging member 300 is different, The member 300 can be stably placed on the deck 920.
When moving to the next work site, on the deck 920 of the crane-equipped carriage 900, if necessary, exchange with the grounding legs 401, 500, 600, legs 410, 510, Exchange to 610. These replacement operations are performed in a state in which the lower rod member 300 is placed on the four rod support bases 700. Since the lower gutter member 300 is placed on the gutter cradle 700, a sufficient space for replacement work is secured between the lower gutter member 300 and the floor F, and the work is facilitated. be able to. The installation work of the offshore work rod 10 at the next work site is as described above.

As described above, according to the marine work dredge (water work dredge), the dredger cradle and the marine work dredging installation method (water work dredge installation method) according to the present invention, the marine work dredge is provided. Is divided into an upper eaves member, a lower eaves member, and a grounding leg, so that handling at the time of installation and relocation becomes easy, and the time for assembly and installation can be shortened. Moreover, evacuation due to stormy weather such as a typhoon can be performed quickly, and the construction period can be prevented from being delayed.
Also, when relocating to a work area under different conditions, the grounding legs are prepared in advance according to the type of the ground, with the upper and lower anchoring members remaining unchanged. Just can cope.
In addition, by installing a tow stand on the crane carrier, it is possible to easily replace the legs on the work table vessel at sea without towing and landing at the base port.
Further, the number of dredging members constituting the marine work dredging is not limited to two, and may be three or more.

It is a front view which shows the structure of the water work hoe concerning the example of 1 embodiment. It is sectional drawing equivalent to the AA line in FIG. It is an expanded sectional view of the B section in FIG. It is an expanded sectional view of the C section in Drawing 1 showing the structure of the grounding leg part for gravel. It is a front view which shows the structure of the grounding leg part for reefs. It is a front view which shows the structure of the earthing | grounding leg part for sandy ground. It is a figure which shows the state which mounted the water work hoe on the cradle stand, (a) is a top view, (b) is a front view, (c) is a front view which shows the cradle stand. It is a figure which shows the state which mounted the surface work cradle on another cradle stand, (a) is a top view, (b) is a front view, (c) is a front view which shows the cradle stand, d) is a plan view showing a cradle cradle. (A)-(e) is a schematic diagram which shows the arrangement | positioning procedure of the marine work anchor.

Explanation of symbols

  10 Marine work dredging (water work dredging), 100 dredging main body part, 200 upper dredging member, 210 cradle, 220 main girder, 221 floor plate, 230 deck part, 240 handrail part, 250 connection leg part, 260 connection part, 261 Mounting plate part, 262 Reinforcing plate, 263 Insertion hole, 270 Clamp member, 300 Lower saddle member, 310 Upper girder part, 320 Lower girder part, 321 322 323 324 Horizontal member, 330 Connecting leg part, 340 Vertical brace member, 350 Horizontal brace member, 360 connecting member, 361 connecting end, 362 H-shaped steel, 370 leg mounting part, 371 hanging part, 372 mounting plate, 380 bolt nut, 400 grounding leg, 401 gravel grounding leg, 410 leg , 411 body, 412 top plate, 413 bottom plate, 420 base, 421 body, 422 top plate, 43 Installation plate portion, 440 pointed portion, 441-444 steel plate, 450 bolt nut, 500 reef grounding leg portion, 510 leg portion, 511 main body, 512 top plate, 513 bottom plate, 520 base, 521 main body, 522 top plate, 530 Installation plate part, 540 concrete base, 550 bolt nut, 560 anchor bolt, 570 mounting reinforcement plate, 600 grounding leg for sand, 610 leg, 611 main body, 612 top plate, 613 bottom plate, 620 base, 621 main body, 622 top Plate, 630 installation part, 631 body, 632 overhang part, 633 shaft part, 640 sinking prevention part, 641 sinking prevention plate, 643 weight, 650 penetration part, 651 body, 660 bolt nut, 662 positioning member, 700 Cradle, 710 support frame, 711 712 H-shaped steel, 720 legs, 730 blur Member, 740 beam material, 800 anchor base, 810 support beam, 820 legs, 830 grounding member, 840 brace member, 850 leg reinforcing member, 900 carrier with crane, 910 crane, 920 deck, 930 filter unit, 940 square block, B sea bottom (water bottom), F floor, W quay

Claims (9)

It comprises a tower body portion having a deck portion, and the grounding leg bottom is placed on the sea bed with the the upper turret main body is installed, a,
The scissors main body is configured to include a plurality of scissors members that are assembled in the vertical direction,
The turret member arranged at the bottom of the previous SL plurality of tower member, the grounding legs selected from the ground leg of the plural kinds which are created in advance be adapted to the state of the sea bed is detachably attached This is a water work dredge characterized by The turret body portion and the ground leg oar for water working according to claim 1, characterized in that it is configured with a size and structure that can cope with past maximum wave height of the area water work is performed. The turret body portion includes a lower turret member disposed on the upper side of the ground leg are tower member, an upper turret member disposed on the upper side of the lower turret member a turret member with the deck, the The dredger for water work according to claim 1, wherein the dredger is configured to be included . The plurality of types of grounding legs are:
A grounding leg for a reef having a fixed plate portion fixed to a concrete foundation placed on a water bottom made of a reef;
A grounding leg for gravel, comprising a flat plate-like installation plate portion arranged on the upper surface of a water bottom made of gravel and a pointed portion protruding from the lower portion of the installation plate portion and penetrating into the gravel,
A grounding leg for sandy ground provided with a settlement prevention plate on a flat plate arranged on the upper surface of the water bottom which is sandy sand, and an intrusion part penetrating into the sandy ground,
4. The water working hoe according to claim 1, comprising any one of the above.   The settling prevention plate of the ground contact leg for sand is arranged so as to be able to swing from a closed state hanging downward at a shaft portion installed in the penetration portion to an open state projecting horizontally. The water working hoe according to claim 4. A scissor body part having a deck part and having at least one scissor member assembled in an up-down direction and a scissor member disposed at the bottom of the scissor body part are detachably attached to the upper part placing a mounting portion, the mounting said turret body portion to portion for mounting a grounding leg bottom is installed in the sea bed, the tower body of the configured water working tower provided with a top oar for受架stand, characterized in that it and a leg for supporting a height in a state it is removable in the ground leg. Boring a floating work dredge with a crane carrier, comprising a dredge main body portion with a deck portion, and a grounding leg portion in which the dredge main body portion is installed at the top and the lower portion is installed at the bottom of the water. When transporting and installing
Said turret body portion, and a plurality of grounding legs comprising a plurality of types of installation part shape formed in advance be adapted to the water bottom condition, the attachment and detachment of the turret main body is placed on top of the ground leg and受架stand for derrick that can support and lift to allow the loading step of loading the crane barge and
A transfer step of transferring the scaffold body portion and the crane barge loaded with the plurality of types of ground legs execution regions water work,
An installation step of installing the water working tower to the sea bed,
The runs between the loading step and placing step, when assembling the water working tower crane base board, and placing the scaffold body portion受架stand for the tower, in the region of installing the tower for water work An assembly process for assembling a water work rod by attaching a grounding leg of a kind suitable for the situation of the bottom of the water,
A method for installing a water work hoe characterized by comprising: Boring a floating work dredge with a crane carrier, comprising a dredge main body portion with a deck portion, and a grounding leg portion in which the dredge main body portion is installed at the top and the lower portion is installed at the bottom of the water. When transporting and installing
Wherein the crane barge, should be placed in towers for受架stand the tower main body can support lifts to allow attachment and detachment of the placed on top of the ground leg,
A recovery step of recovering the crane base board lifting the water working tower installed in run region of water work,
The collected the water working tower, a placing step of placing the scaffold for受架bench,
A leg portion detachment step of detaching the grounding legs from the scaffold body portion placed on受架stand for the tower,
Next, a reassembly process for assembling the water work rod by attaching a grounding leg of a kind suitable for the situation of the bottom of the area where the water work rod is installed,
A method for installing a water work hoe characterized by comprising:   A heel body portion provided with a deck portion, and a grounding leg portion where the heel body portion is installed at the top and the lower portion is installed at the bottom of the water,
  An underwater work rod characterized in that a grounding leg portion selected from a plurality of types of grounding leg portions prepared in advance in conformity with the state of the bottom of the water can be attached to and detached from the rod body portion.

Images