JP2001322591A - Excavating work support ship and excavating work support method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an excavating work support ship capable of effectively supporting excavating work by stably supplying materials and operators to the work in a sea area distant from land. SOLUTION: This excavating work support ship comprises material housing equipment 30 for separately housing plural materials having different properties according to the respective properties and operator housing equipment 20 for housing shift operators at once in the excavating work.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a support ship for providing support for excavation work in deep seas and a method of supporting the same.

[0002]

2. Description of the Related Art Conventionally, excavation work for excavating the seabed has been performed for the purpose of mining and developing mineral resources such as oil and natural gas. In such excavation work, after an excavator (mother ship; usually called a rig) is moved to the destination at sea, the mother ship is held at a fixed point at sea for a predetermined period, and the work is performed using the mother ship as a base for excavation work.

[0003] In such excavation work in the sea area, a support boat (supply boat) for supporting the work may be used. Support vessels, for example, those that tow the mother ship, those that transport the materials for excavation work from the land base to the mother ship,
It is general that the support is divided into various forms.

Conventionally, such excavation work is performed on a specified area in the coastal area, and the land base and the excavation work base (mother ship) are often relatively short. Therefore, replacement of workers is performed by air transport using a helicopter or the like.

[0005]

By the way, in recent years, with the advance of mining technology, excavation work has been performed on the seabed in a deep sea area having a depth of several thousand meters. Such deep waters are often offshore, far away from the shore, and to date little or no effective support vessels have been provided to support such deep water excavations.

[0006] Excavation work in the deep sea water requires a large amount of equipment, and the work is often performed for a long period of time. However, since conventional support vessels are intended for excavation work in coastal waters, it is difficult to stably supply a large amount of supplies for work in the ocean. Moreover,
Helicopter flight area is 300-400 from base
It is limited to a predetermined range, such as within km, and it is difficult to stably supply replacement workers for long-term excavation work.

Further, in the excavation work in the deep sea area, a large amount of excavation waste such as cutting waste is generated with the work. Leaving such wastes in the sea as they are may adversely affect the global environment.

[0008] In the excavation work, generally, investigation and research work on the geology and the like may be performed simultaneously. Furthermore, many parts of the seabed in the deep water have not yet been surveyed, and samples that have not been sufficiently investigated, such as rocks, plants, and microorganisms, can be collected during excavation work. Therefore, there is a demand for the development of a technique for reliably transporting such a sample for investigation and research from the ocean to the land in the original state.

The present invention has been made in view of the above circumstances, and a first object of the present invention is to provide a stable supply of goods and workers to work in a sea area away from land, and to provide a large water depth. An object of the present invention is to provide an excavation work support ship and an excavation work support method capable of effectively supporting excavation work in a sea area.

A second object of the present invention is to provide a drilling operation support ship and a drilling operation support method capable of collecting excavation waste accompanying excavation work without dumping it at sea and suppressing the influence on the global environment. Is to provide.

A third object of the present invention is to maintain the properties of a specific sample collected by excavation work and to transport the sample to land in an original state usable for research and research. An object of the present invention is to provide an excavation support ship.

A fourth object of the present invention is to provide a drilling work support ship and a drilling work support method capable of efficiently transferring waste generated by a drilling operation to a land-based disposal company.

[0013]

According to a first aspect of the present invention, there is provided a support vessel used for supporting an excavation operation, wherein a plurality of materials having different properties are provided with different properties. And a worker accommodation facility for accommodating replacement workers at the same time in the excavation work. According to a second aspect of the present invention, in the excavation work support boat according to the first aspect, a technique is employed in which the material storage facility has a sample storage unit that stores a sample collected by the excavation operation. According to a third aspect of the present invention, in the excavation work support ship according to the first or second aspect, a technique is adopted in which the material storage facility has a container or a tank for storing waste generated by the excavation work. You. Further, the invention according to claim 4 is a support method for supporting excavation work, in which goods necessary for excavation work on a forward path and a worker who replaces excavation work are transported from a land base to the excavation work base, A technique of transporting a sample collected by the excavation work on the return trip, waste generated by the excavation work, and a worker who replaced the excavation work from the excavation work base to the land base is adopted. According to a fifth aspect of the present invention, there is provided a support ship used for supporting an excavation operation, wherein a material accommodation facility for accommodating a plurality of materials having different properties according to their respective properties is provided. A technology is provided that includes a processing device that changes the property of the waste generated by the process, and a processing product storage facility that stores a processing product whose property has been changed by the processing device. The invention according to claim 6 is a support method for supporting excavation work, in which goods required for excavation work are transported from a land base to an excavation work base on an outward path,
A technique is employed in which waste generated by excavation work on the return trip is transported from the excavation work base to the onshore base, and the nature of the waste is changed during the transportation from the excavation work base to the onshore base or while the shore is on the shore. In the present invention, by adopting these technologies, materials are stored separately in the material storage facility according to their properties, so that a plurality of types of materials required for excavation work can be simultaneously transported by sea and reliably and all at once. It will be possible to supply them to the excavation work site. Moreover,
By accommodating replacement workers at once in the worker accommodation facility and transporting them by sea, it becomes possible to periodically replace workers for work in sea areas where helicopters cannot be used. Therefore, it is possible to stably supply goods and workers for work in a sea area away from land.
Further, in the present invention, the excavation waste generated by the excavation work is separated and stored in a material storage facility according to the nature of the excavation work, so that all the waste is transported by sea to land to reliably treat or dispose of the waste. Can be done in a short time. Further, according to the present invention, since the sample storage unit for storing the sample collected by the excavation work is provided, it is possible to maintain the properties of the sample with respect to the sample collected from the seabed even during long-term sea transportation. Become. Further, in the present invention, since a treatment device for changing and processing the property of the waste generated by the excavation work is provided, the property of the waste is changed in accordance with the receiving conditions of the land-based contractor, so that the waste can be treated by the land-based contractor. Can be efficiently delivered to

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a drilling support boat according to the present invention will be described below with reference to FIGS. FIG. 2 shows an excavation work support ship according to the present embodiment
(Referred to as a support ship RSB). The support ship RSB supports the offshore excavation work by transporting goods and personnel by sea between the onshore base and the offshore excavation work base. The sea area to be excavated includes a deep sea area having a depth of several thousand meters, and the support ship RSB of the present embodiment is capable of stably supporting excavation work even in such a deep sea area. Is configured.

The drilling work at sea supported by the support ship RSB includes mining of mineral resources such as oil and natural gas, development of methane hydrate distribution, and survey of methane hydrate distribution on the seabed and underground. It is performed for various purposes such as collecting samples for the purpose. Offshore excavation work is carried out using a mobile offshore drilling rig (mother ship) such as a hull (or barge) or semi-sub (semi-submersible) type.

Further, the offshore destination serving as the excavation work base includes the case of deep water as described above, so that the distance from the land is long, for example, the maximum offshore distance is 3000 to 4000 km. This includes places that are far away.

[0017] Therefore, since the support vessel RSB is intended for transporting the goods to the excavation work base having such a long shore separation distance, the navigation capability is such that long-distance transportation can be completed within a predetermined period. The cruising speed is determined, and the cruising distance is determined so that the vehicle can travel back and forth between the onshore base and the excavation work base and continue the distance including the loss due to rough seas.

Further, the support ship RSB includes an international voyage as a navigation area, and its hull has a predetermined hull against the ice in the sea and on the surface of the sea so that it can be used in a cold region such as a high latitude sea area. It is formed into a strong ice-resistant structure, and the ice-resistant structure is designed to be at the same level as the mother ship. Also, the specifications and the like of the hull facilities and equipment are designed in consideration of use in cold regions (low temperature conditions). In addition,
If the target excavation site is limited to a warm region, it is needless to say that it is not necessary to deal with these cold regions.

Further, the support ship RSB includes a heliport HCP for taking off and landing of the helicopter, and a refueling facility (not shown) capable of supplying fuel to the helicopter. The helicopter is a support vessel RS departing from the land base
It is used when emergency supplies or the like are added to B by emergency air transport and delivery, or when a sick person is urgently transported on land from a support ship RSB approaching the land.

Further, in order to maintain the position of the hull on the ocean, the support ship RSB has a position holding system DPS for controlling the position of the hull in response to external forces such as wind, waves, and tidal currents.
(Dynamic Positioning System). In the present embodiment, the position holding system DPS includes a power supply device, a detection device, a control device, a thruster SRS, a propulsion device SCR (all shown in FIG. 3) and the like (not shown), and based on a detection result from the detection device. Under the control of the control device, the plurality of thrusters SRS and the propulsion units SCR are driven so as to maintain the relative position of the support vessel main body with respect to the offshore excavation work site (offshore drilling rig, mother ship). In addition, the position holding system DPS takes into account sea conditions during cargo handling on the mother ship, and can exert sufficient position holding ability with respect to various conditions such as a wave class, a wind class, and a magnitude of a tidal current. Is configured. Thereby, it is possible to stably perform the cargo handling work while reliably maintaining the distance from the mother ship at the time of cargo handling.

Excavation work in the deep sea water requires a lot of materials and equipment, and the work often takes a long time. Generally, the flight area of a helicopter is limited to a predetermined range, such as within 300 to 400 km from the base, and therefore, for long-term excavation work, it is necessary to supply replacement workers by sea transportation.

For this reason, this support ship RSB is provided with accommodation facilities (worker accommodation facilities and material accommodation facilities) corresponding to work in deep sea water, in order to transport personnel and materials by sea to mother ships in the ocean. I have.

FIGS. 3 and 4 show a support ship R of the present embodiment.
Worker accommodation facility 20 and material accommodation facility 3 in SB
The example of arrangement of 0 is shown.

The worker accommodation facility 20 is provided on the waterline on the bow side, and is a living room 21 for the worker to go to bed, a public room 22 commonly used for workers' daily activities such as meals and recreational activities, It has a medical office for managing the health of workers, a navigation room 23 (steering room, radio room, office room) and the like. The workers to be accommodated in the worker accommodation facility 20 include an excavator engaged in excavation work and a support ship RS.
In addition to seafarers involved in the operation of B, engineers and researchers who conduct research and research are also included.

The living room 21 is configured to accommodate a number of replacement workers at a time corresponding to the working conditions in the deep water. In other words, when working in deep water, the replacement period is often set longer than when working along the coast, and as mentioned above, it is almost impossible to transport workers by helicopter. During the shift, more workers need to be transported at once than in coastal operations. For this reason, the accommodation capacity of the living room 21 is determined so that not only seafarers, technicians and researchers, but also all such replacement workers can sleep at once.

Furthermore, the public room 22 and the medical office are provided with, for example, a resting salon, a recreation room, a library, and the like in order to manage such a large number of workers in a comfortable and healthy state.
It has enough facilities for long-term boarding, such as a cafeteria and medical facilities.

The support vessel RSB includes a rocking device 24 for reducing the sway of the hull while the vessel is stopped and while navigating, for the purpose of stably maintaining the comfort of workers during navigation. Have. 5 and 6 show a configuration example of the rocking device 24 and a model diagram for reducing the rocking of the hull in this embodiment.

As shown in FIGS. 5 and 6, the rocking device 24 moves the solid mass 25 having a predetermined weight in the lateral direction of the hull (in the width direction of the hull) with respect to the hull swaying due to waves or the like. Thus, the rolling of the hull is reduced. That is, the rocking device 24 includes the solid mass 25, a rail 26 having an arc-shaped sliding portion for guiding the movement of the solid mass 25, a detection device 27 for detecting a roll of the hull, A drive device 28 for moving the solid mass 25 and a control device 29 for controlling the amount of movement of the solid mass 25 based on the detection result of the roll by the detection device 27 are provided. The control device 29 controls the solid mass 25
The driving device 28 is controlled so that the solid mass 25 is moved according to the sway of the hull so that the force of gravity acts effectively in the opposite direction to the swaying force.

FIG. 6 (B) shows a combination of the active rocking action of the control device 29 and the passive rocking action of the solid mass 25 moving with the inclination of the hull. As described above, it is possible to exert a large damping effect with a small power, and to obtain a high damping effect even when the ship is stopped or traveling at low speed. Further, even in the case of stormy weather, the lateral motion of the hull can be appropriately reduced by switching the control mode of the control device 29 or the like. The rocking device 24 is disposed at a position higher than the center of gravity of the hull in order to effectively apply the weight of the solid mass 25. Moreover, the rocking device 2
The configuration of 4 is not limited to the configuration shown here, and various types can be applied. Further, a vibration reducing device may be provided in the device, or a plurality of vibration reducing devices may be used in combination.

Returning to FIG. 3, the material storage facility 30 is used to simultaneously transport a plurality of materials having different properties by sea.
It is configured such that a plurality of materials are accommodated separately according to their properties. The equipment to be transported to be stored in the material storage facility 30 includes equipment for drilling (drilling pipes and casing pipes, materials for working mud, cement material, etc.), various spare parts for drilling equipment, and navigation work. And institutional materials (instruments, engine spare parts,
Consumables, etc.), general materials (fuel, lubricating oil, fresh water, ship supplies,
Foodstuffs, etc.). In FIG.
1 is a first material storage unit, 32 is a sample storage unit, and 33 is a sample storage unit.
Denotes a second material storage unit, reference numeral 34 denotes a muddy water material tank, and reference numeral 35 denotes a waste muddy water recovery tank.

The first material storage section 31 is composed of a transportable storage device such as a container or a drum in which the above-mentioned materials are stored, and is arranged on a stern side deck DH having a wide space. The first material storage unit 31 is provided with materials and equipment such as excavation pipes and casing pipes for excavation work, boat supplies and foodstuffs, which have relatively little problem in performance and characteristics even when exposed to the atmosphere outside the vessel. Is to accommodate. Further, the first material storage section 31 also stores a solid cutting waste container (cuttings) at the time of excavation work. As described above, since the first material storage unit 31 is arranged on the deck DH having a large space, it is possible to sufficiently store a large amount of excavation generated during excavation work. The liquid fuel and fresh water are usually stored in a second material storage section 33 described later.

The sample storage section 32 is for storing a specific sample collected by excavation work in the deep water, and in the present embodiment, the center of the hull is reduced in order to reduce the influence of the sway of the hull. It is installed in a dedicated hangar 40 surrounded by steel walls to prevent the sample from touching the outboard environment.

The samples stored in the sample storage unit 32 include:
For example, rocks, plants, or microorganisms collected from underground or from the sea floor correspond to such samples, and are often valuable for investigation and research. The samples stored in the sample storage unit 32 are not limited to such valuable materials, but may be various, such as rocks for geological surveys for searching various mineral resources.

As shown in FIG. 7, the sample storage section 32 includes a refrigeration container 41 serving as a refrigeration device for storing the sample and keeping it at a predetermined temperature, and a power supply 42 for supplying electric power to the refrigeration container 41. And a securing device 43 for fixing the posture of the refrigerated container 41 in the hangar 40 and fixing the sample in the refrigerated container 41. As the securing device 43, for example, a device such as a rope, a metal chain, or a fixing bolt is used.

The sample storage unit 32 can stably maintain the properties of a sample collected from underground or from the seabed even during long-term sea transportation. Moreover, the sample storage unit 32 is provided with a hangar 40 made of a steel wall.
Because it is stored in the refrigerated container 41, it is possible to prevent the refrigerated container 41 from wearing waves from the sea and the sample from touching the outboard environment. In addition, the refrigerated container 41 allows the sample to be stored in its mined state, for example, at the sea floor, to maintain it at a predetermined temperature. In addition, since the swaying of the sample due to the sway of the hull is suppressed by the lashing device 43, damage or damage of the sample hardly occurs. Moreover, as described above, the support vessel RSB includes the rocking device 24 that reduces the sway of the hull, and the posture of the sample (the refrigerated container 41) is more stably held. Therefore, the properties of the sample can be reliably maintained in a good state for a long period of time. In addition, the inside of the hangar 40 or the inside of the refrigerated container 41 may be purged with a predetermined gas so as to suppress deterioration of the sample due to contact with air.

Returning to FIG. 3, the second material storage section 33 is mainly composed of a container formed inside the hull, such as a tank, and includes fuel, supply fuel, drinking water, clear water for drilling, waste mud, dry bulk (barite). , Bentonite, cement, etc.) mainly for liquid and powdery materials. In the second material storage section 33, a storage destination (mainly a tank) is often determined for each material, and each storage destination is designed to have a capacity according to the capacity required for one-time transportation.

The muddy water material tank 34 and the waste muddy water collecting tank 35 are a part of the second material storage section 33. Of these, the muddy material tank 34 is for storing a material (barite, bentonite, cement, muddy material, etc.) for generating muddy water for excavation work. It is arranged separately for each material,
It is configured to contain the solid (powder) material. The muddy water for excavation (drilling muddy water) is generated by adding and mixing water to each material stored in the muddy water material tank 34.

The drilling mud is used in a drilling operation for the purpose of removing cutting waste, preventing collapse of a drilled portion, preventing ejection of fluid, cooling and lubrication of bits and drill pipes, and the like. The drilling mud is sent from the drilling rig (mother ship) to the drilling hole and then returned to the drilling rig again. Because the circulated mud contains various substances in the stratum (such as cuttings and gas),
After removing those impurities in the drilling rig, it is sent again to the borehole and reused. The mud that has passed the predetermined conditions is carried out of the excavator as mud for disposal.

The waste mud collection tank 35 is used for collecting and storing used mud carried out from such a drilling rig, and its volume is determined so that a large amount of mud can be stored. Located in the body.

Further, a gas treatment device or a stirrer 38 shown in FIG. 1 may be installed in the waste mud collection tank 35.
A gas treatment device is a device that treats highly toxic and toxic gases such as hydrogen sulfide and flammable gas remaining in mud collected from the sea floor by detoxifying the gas and then discharging it. The processing is performed on the gas discharged from the collection tank 35. For the purpose of suppressing the generation of harmful gas from mud,
In order to keep the inside of the tank at a desired temperature, a temperature adjusting device may be installed in the waste mud collection tank 35.

The stirrer 38 stirs the muddy water in the waste muddy water recovery tank 35, and includes, for example, a pump capable of circulating thick muddy water, a stirring screw, and piping components. . This stirring device 38
Is operated mainly when transferring waste mud to a land base or the like, and is used to prevent sedimentation of mud solids in the tank by stirring the mud in the tank.

The waste muddy water recovery tank 35 is formed so as to have as little irregularities as possible on the inner wall side in order to enhance the stirring effect in the tank. That is, the waste muddy water recovery tank 35 is designed to reduce internal irregularities while maintaining a predetermined strength by, for example, providing an aggregate for reinforcement on the outer wall side or forming a double shell structure. ing. Further, the inner surface of the waste mud collecting tank 35 is subjected to a corrosion-resistant treatment so as to have chemical resistance to used mud.

As described above, the material storage facility 30 includes the first material storage unit 31, the sample storage unit 32, the second material storage unit 33,
Further, the waste mud collecting tank 35 is configured so that waste generated by offshore excavation work or a specific sample can be stored separately according to its properties. Therefore, waste generated by drilling work,
Alternatively, it is possible to take specific samples back to the land, securely process and dispose of them, or use them as investigation and research targets.

In the material storage facility 30, as described above, the storage locations for each material are arranged according to the nature of the material. Something like security is taken into account. Therefore, it is possible to store a plurality of materials at a time and to maintain a stable state for a long time.

[0045] In addition, materials are drilled offshore (mother ship).
Or as a material transfer device to transfer to a land base,
A deck crane DC (see FIG. 3) mainly disposed on the deck for transferring the materials stored in the first material storage unit 31 and the sample storage unit 32, and for transferring the materials in the second material storage unit 33. A fuel transport pump and a drilling fresh water pump (not shown), a dry bulk transport device (not shown) for transporting the material of the mud material tank 34, a waste mud transport pump (not shown) for transporting the mud in the waste mud collection tank 35, and the like It has.

A plurality of these material transfer devices are installed in accordance with the type of material (for example, two fuel transport pumps), and their capacity specifications are determined so that the transfer of each material can be completed within a predetermined time. ing.

Further, the material storage facility 30 has an attitude of the hull in both the case of transporting the goods by sea from the land base to the offshore excavation base and the case of transporting the goods by sea from the excavation base to the land base. The storage area for each material is arranged to be stable. FIG. 10 shows the stacked state. Here, FIG. 8A shows a support ship RSB from a land base.
8 (B) shows the time when the support vessel RSB enters the onshore base at the time of departure from the port, and the hatched portions respectively indicate the locations where the goods are stored at each time.

That is, as shown in FIG. 8, in the material storage facility 30, the storage locations of the respective materials are arranged on the basis of the weight balance during navigation, and the space between the land base and the excavation work base is provided. When transporting goods by sea, the posture is always stable, and it is possible to maintain a stable navigational state even for long-term sea transportation.

Here, a series of flows of the support method in the support ship RSB configured as described above will be briefly described with reference to FIG. First, supplies will be supplied to the support ship RSB from the land base LBS. At this time, if necessary, the next replacement worker is accommodated in the support ship RSB at one time. In addition,
Normally, the worker replacement period is longer than the supply interval, so whether or not to accommodate a large number of workers simultaneously with supplies is arbitrary. Excavation work in the ocean is often replaced by a larger number of workers than conventional coastal work.

When the storage of the supplies and the workers is completed, the support ship RSB sails, and the supplies and the workers are simultaneously moved to the excavation work base MO in the deep water area at the destination.
Transport by sea to D (mother ship). In the excavation work base, excavation work is performed for a long period of time, and when it is time to replace the work, the worker to be subjected to the excavation is accommodated in the support ship RSB from the excavation work base MOD.

Further, at the excavation work site, a large amount of excavated material such as cutting waste and waste such as waste mud are generated due to the excavation work, and all of them are stored in the material storage facility 30. It will also store equipment and materials that are no longer needed and specific samples collected.

The support ship RS that has finished storing the supplies and the workers
B sails for the land base LBS. After arriving, goods and workers are transferred from the support ship RSB to the onshore base LBS. Of the materials transferred to the land base LBS, those that need to be disposed or processed are further transferred to a predetermined processing site, where final processing is performed.

By such a series of flows, the support ship R
In the SB, (1) supply of drilling equipment and various research equipment, as well as supplies of food and living equipment, etc. to the drilling work base MOD (mother ship), (2) regular drilling workers in pelagic waters where helicopters cannot be used (3) Smoothly carry out support operations such as crew change, (3) early transport of specific samples for research and investigation, and (4) transport of drilling waste from the drilling operation base MOD. be able to.
In addition, such support work is repeatedly performed during the excavation work.

That is, according to this support ship RSB, it is possible to simultaneously perform a plurality of support operations in one transportation. Therefore, the operation plan can be designed simply,
Economical cost reduction can be achieved. Therefore, it is possible to stably supply supplies and workers for work in a sea area away from land, and to effectively support excavation work in a deep sea area.

Further, since excavated materials and waste generated by excavation work are stored separately in material storage facilities according to their properties, all of them can be transported by sea to land for reliable treatment and disposal. It becomes possible. That is, it is possible to minimize the influence on the vicinity of the excavation point and suppress the influence on the global environment.

In the support vessel RSB, the properties of the sample collected from the seabed can be stably maintained by the sample storage section 32, so that the preservation and safety of the sample can be ensured even in long-term sea transportation. While secured, the sample can be transported ashore while still being available for research and research.

By the way, a large amount of waste (hereinafter collectively referred to as waste) such as a large amount of digging waste and waste mud generated by excavation work is transferred to an onshore base, and then an industrial waste intermediate treatment company or Handed over to a disposal company such as an industrial waste disposal company. Since the delivery conditions at this time vary depending on the processing company, it is necessary to change the properties (characteristics, form, etc.) of the waste according to the conditions. This change processing is usually performed at a land base, but may be performed on a drilling boat or a support boat. When the nature of the waste is changed on the support ship, the nature of the waste is changed by a predetermined processing device described later during the transportation of the waste from the excavation work base to the onshore base or while the shore is on the shore. .

FIG. 9 shows an example of a processing flow when the nature of the waste is changed on the support ship RSB. As a form of transportation of waste at the time of delivery at the land base LBS,
For example, there are slurry, powder, and soil. Waste generated from drilling operations (such as shavings and waste mud)
Because it is solid sludge and sludge containing a large amount of water,
The soil is formed by performing a coagulation treatment and a dehydration treatment as necessary. Further, the waste can be powdered by drying. Further, the waste can be slurried by mixing a predetermined substance or water with the cuttings. Therefore, the support vessel RSB is provided with a treatment device 70 for changing and processing the properties of the waste, and the waste mud is condensed.
At least one of an apparatus for dehydrating soil, an apparatus for pulverizing waste sludge, and an apparatus for slurrying excavated waste is installed.

The waste generated by the excavation work is:
Generally, a stabilization treatment is performed for the purpose of preventing elution of specific heavy metals (particularly, substances that may adversely affect the environment) contained in waste. The treated material subjected to the stabilization treatment is buried or turned into resources such as bricks, tiles, and roadbed materials. As a method of stabilization processing,
For example, there is known a cement solidification method in which cement is mixed with waste to change properties into soil. Therefore,
As a device for this stabilization treatment, a support vessel RSB is provided with a device for solidifying waste sludge, a device for solidifying powder sludge using waste sludge as a raw material, a device for solidifying waste sludge as a raw material, and a slurry for sludge using raw waste as a raw material. It is preferable to install at least one of a cement solidifying device and the like. Furthermore, support ship RSB
A processing object storage facility 71 (a tank, a container, a transport bag, etc.) for storing a processing object whose properties have been changed by each of the processing apparatuses described above,
A transport device (such as the above-described material transport device) for transporting the processed material toward is installed. Each of the above-described devices is selectively used in accordance with waste delivery conditions, and is installed on the deck of the support ship RSB or inside the hull.

As described above, by changing the nature of excavated materials and wastes on the support ship in accordance with the receiving conditions of the land-based treatment company, the waste sludge and excavation during transportation from the excavation work base to the support ship RSB are changed. And the mode of transport when transporting from the support vessel to the onshore base LBS can be freely selected, increasing the degree of freedom of operation of the support vessel and facilitating adaptation to changes in landside acceptance conditions. . In addition, since the property of the waste is changed using the time required to move from the excavation site to the land site or the time during berthing, the time required for delivery is reduced. From this, it is possible to improve the efficiency of the work of transferring waste from the support ship to the land-based treatment company.

It should be noted that the shapes, combinations, and the like of the components shown in the above-described embodiments are merely examples, and can be variously changed based on design requirements without departing from the gist of the present invention. For example, the number of support vessels that support one excavation work base is arbitrary, and the arrangement of the accommodation locations of the materials described in the above-described embodiment is also arbitrarily determined according to the materials to be transported. Further, the present invention is not limited to the support using only the support boat as described above, and may be supported in cooperation with another boat, such as a standby boat that is always held at a fixed point at the excavation work base.

[0062]

As described above, according to the present invention, the following effects can be obtained. The excavation work support ship according to claim 1 includes a material accommodation facility for accommodating a plurality of materials having different properties separately according to the properties.
Materials required for excavation work can be simultaneously transported by sea, and a plurality of types of supplies can be reliably and simultaneously supplied to the excavation work base. In addition, since a worker accommodation facility is provided, replacement workers are accommodated in this facility at one time and transported by sea, so that workers can be periodically replaced even in work in sea areas where helicopters are not available. It becomes possible.
Therefore, it is possible to simultaneously achieve a plurality of objectives by one transportation, and it is possible to easily simplify the operation plan, and it is easy to economically reduce costs. Therefore, it is possible to stably supply supplies and workers for work in a sea area away from land, and to effectively support excavation work in a deep sea area.

The excavation work support ship according to the second aspect of the present invention includes the sample storage unit for storing the sample collected by the excavation operation, so that the sample collected from the seabed can be used for the long-term sea transportation. The specimens can be transported to land in their original condition, available for research and research, while maintaining their properties.

Since the excavation work support ship according to the third aspect has a container or a tank for accommodating the waste generated by the excavation work, the excavation waste accompanying the excavation work is collected without being dumped at sea, and the waste is collected. All of which can be transported by sea to land and be processed or disposed of reliably. Therefore, the influence on the global environment can be suppressed.

In the excavation work support method according to the fourth aspect, a plurality of types of mass materials are supplied to the excavation work base at a time by transporting the materials necessary for the excavation work and the replacement workers at once by sea. And workers can be periodically replaced for work in sea areas where helicopters are not available. Therefore, it is possible to stably supply supplies and workers for work in a sea area away from land, and to effectively support excavation work in a deep sea area.

In the excavation work support ship according to the fifth aspect and the excavation work support method according to the sixth aspect, the properties of the excavated waste are changed according to the acceptance conditions of a land-based disposal contractor so that the excavated waste can be treated on the land. It can be efficiently delivered to the trader.

[Brief description of the drawings]

FIG. 1 is a model diagram showing an example of a flow of a support operation of an excavation work support ship according to the present invention.

FIG. 2 is a configuration diagram schematically showing an embodiment of the excavation work support ship according to the present invention.

FIG. 3 is a schematic configuration diagram of an arrangement example of accommodation facilities of the excavation work support ship of FIG. 2 as viewed from a side.

FIG. 4 is a schematic configuration diagram showing an example of arrangement of accommodation facilities of the excavation work support ship of FIG. 2 as viewed on a plane.

FIG. 5 is a schematic configuration diagram showing a state of the rocking device.

FIG. 6 is a model diagram showing how the sway of the hull is reduced by the vibration reducing device of FIG. 5;

FIG. 7 is a schematic configuration diagram illustrating a state of a sample storage unit.

FIG. 8 is a diagram showing a state in which goods are stored, and FIG.
Represents the time of departure from a land base, and (B) represents the time of arrival at a land base.

FIG. 9 is a diagram showing an example of a processing flow when changing the nature of the waste on the support ship.

[Explanation of symbols]

 RSB Excavation work support vessel MOD Excavation work base (mother ship, excavation equipment) HCP Heliport DPS Position holding system DH Deck (Stern side) 20 Worker accommodation equipment 30 Material accommodation equipment 21 Living room 22 Public room 24 Shaking device 31 First material accommodation Unit 32 Sample storage unit 33 Second material storage unit 34 Mud material tank 35 Waste mud collection tank 38 Stirrer 40 Hangar 41 Refrigerated container (refrigerator) 43 Lashing device 70 Processing device 71 Treated product storage facility

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroyasu Ishiguro 3-20-16 Nishiazabu, Minato-ku, Tokyo Inside the Japan Ocean Drilling Co., Ltd. (72) Inventor Masato Kawai 2-1-1 Toyosu, Koto-ku, Tokyo Ishikawajima Harima Heavy Industries, Ltd. Tokyo Daiichi Plant (72) Inventor Kentaro Watanabe 2-1-1, Toyosu, Koto-ku, Tokyo Ishikawajima Harima Heavy Industries Co., Ltd. Tokyo Daiichi Plant F-term (reference) 2D065 FA00 GA00 4D059 AA09 BK01 CB01

Claims (6)

[Claims] 1. A support vessel used for supporting an excavation operation, comprising: a material accommodation facility for accommodating a plurality of materials having different properties according to their respective properties; An excavation work support ship comprising: a worker accommodation facility for accommodating workers at once. 2. The excavation work support boat according to claim 1, wherein the material storage facility has a sample storage unit for storing a sample collected by the excavation work. 3. The excavation work support boat according to claim 1, wherein the material storage facility has a container or a tank for storing waste generated by the excavation work. 4. A supporting method for supporting a digging operation, comprising: transporting materials necessary for the digging operation on a forward path and a worker who replaces the digging operation from a land base to the digging base; An excavation work support method, comprising transporting a collected sample, waste generated by the excavation work, and a worker who has replaced the excavation work from the excavation work base to a land base. 5. A support vessel used for supporting a drilling operation, comprising: a material storage facility for storing a plurality of materials having different properties according to their respective properties; An excavation work support ship, comprising: a processing device that performs a property change process; and a processed material storage facility that stores a processed material whose property has been changed by the processing device. 6. A support method for supporting excavation work, comprising: transporting materials necessary for excavation work from a land base to an excavation work base on an outbound route, and removing waste generated by the excavation work from the excavation work base on a return route. A method for supporting excavation work, comprising transporting the waste to a land base and changing the nature of the waste during transportation from the excavation work base to the land base or while the land base is berthing.