KR20220133334A - Offshore working facility and construction method thereof - Google Patents

Abstract

The present invention provides an aspect work facility capable of stable work even in the deep sea area and improving work efficiency. The side work equipment has three prisms 10 , a deck 20 supported so as to be able to move up and down with respect to the prism 10 , and a crane 30 mounted on the deck 20 . The deck 20 is comprised as a floating body structure, and has the main deck part 21 and the 1st protrusion part 22 protruded from the main deck part 21, and was formed. The crane 30 is mounted on the first protrusion 22 . A side work installation is comprised by adding the 1st protrusion part 22 and the crane 30 to the jackup type excavation rig which removed the excavation installation and the cantilever. The first protrusion 22 is added to the main deck portion 21 using the support structure of the cantilever.

Description

Facing work equipment and its manufacturing method {OFFSHORE WORKING FACILITY AND CONSTRUCTION METHOD THEREOF}

FIELD OF THE INVENTION The present invention relates to a side work installation that can be used in the construction of side installations, such as side wind turbines, and a method for manufacturing the same.

From the viewpoint of effective utilization of natural energy, side wind power generation is attracting attention.

In the construction of a side wind power plant, a side work facility such as a self-elevating type working overhead line (SEP) is often used. A self-elevating type work pole usually has a plurality of pedestals and a deck supported by these poles so that it can be freely moved up and down (Patent Document 1, Patent Document 2). A crane for work is mounted on a deck, and assembly of a side wind power plant is performed using this crane. Moreover, the deck can also be used as an unloading space etc. of various components of a positive wind power plant.

Japanese Laid-Open Patent Publication No. 2015-37925 Japanese Laid-Open Patent Publication No. 2016-215937

In recent years, as a side wind power generation facility, for example, a side wind power generation facility with a high output of 6 MW or more is being developed. In addition, floating equipment is becoming a trend to be developed and put to practical use. As mentioned above, the crane for a work is mounted on the deck of a side work facility, and it is used also as an unloading space of various parts, etc. Therefore, in order to construct a large-scale wind power generation facility, a side work facility having a larger deck is required. In addition, in order to construct a floating wind power plant, it is necessary to have a surface work facility that can work stably even in a sea area where the water depth exceeds 90 m.

For surface construction in sea areas where the water depth exceeds 90 m, since there is nothing that can be used in the existing self-elevating work poles, a large floating crane is usually used, but it is easy to be affected by waves, and the waiting period for work is shortened. A decrease in work efficiency is likely to occur. On the other hand, the surface work equipment which has a large deck causes the fall of the towing speed from a port to the sea area which is the construction site of a surface equipment. A decrease in towing speed causes the air to prolong in the lateral equipment.

Therefore, an object of the present invention is to provide an aspect work facility capable of stably working even in a deep sea area, and improving work efficiency, and a method for manufacturing the same.

Aspect work equipment of the present invention,

with three or more footnotes;

A deck configured as a floating body structure and supported so as to be lifted with respect to the prism,

Having a crane mounted on the deck,

The deck is an aspect work facility having a main deck portion where the prism is disposed, and a protrusion formed to protrude from the main deck portion,

The aspect work equipment is constructed by adding the protrusion and the crane to the existing jack-up type excavation rig having the main deck portion and the pedestal,

The protrusion is added to the main deck portion using the support structure of the cantilever for the onboard excavation facility mounted on the existing jack-up type excavation rig,

The crane is mounted on the protrusion.

The manufacturing method of the aspect work equipment of the present invention,

A jack-up type excavation rig having three or more prisms, the prisms are arranged, a main deck part supported so as to be able to move up and down with respect to the prisms, a cantilever supported through the support structure on the main deck part, and an excavation facility disposed on the cantilever preparing,

removing the cantilever and the excavation equipment from the jack-up type excavation rig;

adding a protrusion formed to protrude from the main deck portion to the main deck portion using the support structure; and

and mounting a crane on the protrusion.

ADVANTAGE OF THE INVENTION According to this invention, even if it is a deep sea area, it can provide the surface work facility which can work stably and efficiently. Moreover, according to the manufacturing method of the aspect work equipment of this invention, the said aspect work facility can be manufactured for a short period of time and at low cost.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic side view of the aspect work facility by one Embodiment of this invention.
FIG. 2 is a schematic plan view of the side work equipment shown in FIG. 1 .
FIG. 2A is a diagram showing the internal structure of a deck in the side work equipment shown in FIG. 2 .
3 : is a figure explaining the work range of the crane at the time of arrange|positioning the crane in the area|region enclosed by the prismatic.
Fig. 4 is a schematic side view of a surface work facility according to another aspect of the present invention in which the deck has a multi-layer structure.
FIG. 5 : is a figure explaining an example of the usage form of the side work equipment shown in FIG. 1. FIG.

1 to 3, having a pedestal 10, a deck 20 supported on the pole 10, and a crane 30 mounted on the deck 20, according to an embodiment of the present invention An aspect working installation 1 is shown. This side work installation 1 can be used for construction of side installations, such as a side wind power plant, for example. The deck 20 is constituted as a floating body structure, and at the time of construction of the aspect facility using the aspect work facility 1, the aspect work facility 1 is a construction site of the aspect facility by a towing vessel, such as a tug boat. It is foretold to the sea area.

The pedestal 10 supports the deck 20 above the sea level during the operation in the aspect by the aspect work equipment 1 . Therefore, the prism 10 has a length that can support the deck 20 from above the sea level in a state in which the lower end is mounted on the seabed. The side work installation 1 has three or more prisms 10 in order to support the deck 20 stably. The structure of the pedestal 10 may be arbitrary as long as the pedestal 10 can fulfill the above functions, for example, it is used for a self-elevating work rig or jack-up type excavation rig, which is a kind of the side work equipment 1 . A well-known structure, such as a structure of a footnote, is employable. The length of the pole 10 is not particularly limited, but, for example, even at the time of construction in a sea area exceeding 90 m, the length that can be stably constructed without being affected by waves by mounting the pole 10 It is preferable to have Moreover, the cross-sectional shape of the prism 10 is not specifically limited, either, Arbitrary shapes, such as a circular shape and a polygon, may be sufficient.

The deck 20 is supported so as to be able to freely move up and down with respect to the prism 10 by an elevating mechanism (not shown). As the lifting mechanism, any mechanism such as a rack-and-pinion mechanism can be used. At the time of towing of the side work equipment 1, this raising/lowering mechanism is operated, and the pedestal 10 is raised with respect to the deck 20 so that the pedestal 10 may not be seated. Since the deck 20 is comprised as a floating body structure, by raising the pedestal 10, the surface work equipment 1 floats on the sea level, and the aspect work equipment 1 can be forged in this state.

The deck 20 has a ceiling wall 20a, a bottom wall 20b, and an outer peripheral wall 20c, whereby the deck 20 is configured as a floating body structure in which a closed internal space is formed. As shown in Fig. 2A, the interior space of the deck 20 is divided into a plurality of compartments by at least one bulkhead 20d that is a strength member, thereby making the upper surface of the deck 20 a work space and construction aspect Mechanical strength sufficient for use as a space for mounting equipment parts is secured.

As shown in FIG. 2 , the deck 20 has a main deck portion 21 , a first projection 22 , and a second projection 23 . In the illustrated form, the deck 20 has two first projections 22 and two second projections 23, but the number of the first projections 22 and the number of the second projections 23 are arbitrary. may be Among these main deck part 21, the 1st protrusion part 22, and the 2nd protrusion part 23, the main deck part 21 is the part which has the largest area when viewed from above, and the prism 10 is the main deck part 21. It is placed on the outer edge of Therefore, most of the upper surface of the main deck part 21 can be utilized as work space and space for the component mounting of the side installation to construct. When the side installation is a side wind turbine, it is preferable that the deck 20 has a space in which, for example, parts of the side wind turbine 1 can be mounted. The planar shape of the main deck part 21 may be arbitrary.

The 1st protrusion part 22 can be made into the shape which protruded convexly from the main deck part 21 with respect to the side which connects two adjacent prismatics 10 when seen from the upper side. Moreover, it is preferable to comprise so that the upper surface of the 1st protrusion part 22 may be on the same plane as the upper surface of the main deck part 21. As shown in FIG. Thereby, the working space of the upper surface of the deck 20 and the space for component mounting can be expanded substantially.

A crane 30 is mounted on the first protrusion 22 . A fixed type may be sufficient as the crane 30, and a crawler type may be sufficient as it. However, since an operation|work is performed without moving on the 1st protrusion part 22 in many cases, the fixed crane 30 is substantially sufficient. Moreover, compared with the crawler type crane, the fixed crane 30 also has a small area occupied on the deck 20, and it is advantageous also from the point which can ensure a larger space on the deck 20.

By mounting the crane 30 on the first protrusion 22 , the crane 30 is mounted on the outside of the area surrounded by all the prisms 10 (three prisms 10 in this form) supporting the deck 20 . will be located in

In this way, by mounting the crane 30 on the first protrusion 22 and positioning it outside the area surrounded by the prism 10, as shown in FIG. 2, the working range θ1 of the crane 30 (crane) 30) can be expanded to a range exceeding 180°. On the other hand, when the crane 30 is mounted on the main deck part 21 as shown in FIG. 3, since the pedestal 10 is normally arrange|positioned at the corner part of the main deck part 21, the crane 30 is located in the region sandwiched between the two prisms (10). Therefore, the working range θ2 of the crane 30 is less than 180°. When the working range of the crane 30 is expanded, the degree of freedom of the work by the crane 30 can be improved.

In addition, if the deck 20 whole is comprised as a floating body structure, the 1st protrusion part 22 itself may be comprised as a floating body structure, and may not be comprised as a floating body structure. When the first protrusion 22 is configured as a floating body structure, the first protrusion 22 is, similarly to the main deck portion 21, a ceiling wall, a bottom wall and an outer circumferential wall forming an inner space in the first protrusion 22 . can have The 1st protrusion part 22 may have a partition further as needed.

The 2nd protrusion part 23 is a position different from the 1st protrusion part 22, and protrudes from the main deck part 21 in the shape which does not exceed the width circle of the main deck part 21, and is formed. The second protrusion 23 also has a shape protruding convexly from the main deck portion 21 with respect to the side connecting two adjacent prisms 10 when viewed from above, similarly to the first protrusion 22 . . Moreover, the 2nd protrusion part 23 is comprised as a floating body structure. Accordingly, the second protrusion 23 may have a ceiling wall, a bottom wall, and an outer peripheral wall forming an inner space in the second protrusion 23 , similarly to the main deck portion 21 . The 2nd protrusion part 23 may further have a partition as needed.

By adding the 2nd protrusion part 23 to the main deck part 21, the space on the deck 20 is enlarged, and, at the same time, stability during towing of the side work equipment 1 can be improved. Moreover, since the 2nd protrusion part 23 is a shape which does not exceed the width circle of the main deck part 21, it is suppressed that resistance becomes large at the time of towing. Thereby, for example, the fall of the towing speed is suppressed, and the side work installation 1 can be forwed efficiently. In order to suppress the resistance at the time of towing more, when the side work equipment 1 is comprised so that it may tow in the direction of the white arrow shown in FIG. 2A, the 2nd protrusion part 23 is connected with the main deck part 21 and the 2nd protrusion part 23 It is preferable to make the shape which combined ) into the shape used as the linear (船-shape) which the width|variety spreads from the bow side toward the stern side.

As mentioned above, the case where the deck 20 has a single-layer structure has been described, but the deck 20 may have a multi-layer structure. In Fig. 4, a schematic side view of an aspect work facility having a multi-storey deck is shown. In addition, in the following description about the aspect work facility shown in FIG. 4, about the structure similar to the aspect work facility demonstrated so far, the same code|symbol is attached|subjected to FIG. 1 etc., and those description is abbreviate|omitted.

In the aspect work installation 1 shown in FIG. 4, the deck 20 has the 2nd ceiling wall 120a and the 2nd ceiling wall 120a arrange|positioned above the ceiling wall 20a at intervals with the ceiling wall 20a. It has a second outer peripheral wall 120c and a second partition wall (not shown) supporting the ceiling wall 20a at a distance therebetween, whereby the deck 20 has a two-layer structure. The structure arranged above the ceiling wall 20a by the ceiling wall 20a, the second ceiling wall 120a, the second outer peripheral wall 120c and the second partition wall is a floating body in which an internal space divided into a plurality of divisions is formed. structured as a structure. Therefore, even if structures such as the second ceiling wall 120a, the second outer peripheral wall 120c and the second bulkhead are added on the ceiling wall 20a, the deck 20 is used to forw the side work equipment. The necessary buoyancy is ensured.

The 2nd ceiling wall 120a and the 2nd outer peripheral wall 120c are the main deck part 21 (refer FIG. 2), the 1st protrusion 22 (refer FIG. 2), and the 2nd protrusion 23 (refer FIG. 2). It can be arrange|positioned at the position corresponding to the main deck part 21 at least among them. That is, the entire deck 20 need not have a two-layer structure. However, in order to effectively utilize the upper surface of the deck 20, the second ceiling wall 120a so that all regions of the main deck portion 21, the first projection 22 and the second projection 23 have a two-layer structure. ) and the second outer peripheral wall 120c are preferably disposed.

By making the deck 20 into a two-layer structure in this way, the mechanical strength of the deck 20 can be improved, and a heavier object can be mounted on the deck 20 . As a result, at the time of conveying the parts from the construction yard of the construction of a surface facility to the sea area which is a construction site, a surface work facility can be used for conveying more or heavier parts. Here, the case where the deck 20 has a two-layer structure has been described, but the deck 20 can also be configured with three or more layers.

Next, the construction method of the side installation using the side surface work installation 1 of this form is demonstrated, taking the case where a side installation installation is a side surface wind power plant as an example.

First, from the construction yard for construction to the sea area which is a construction site, various parts, such as a windmill member of a side wind power plant, and the side work installation 1 are moved. The movement of the surface work equipment 1 is carried out by raising the pedestal 10 with respect to the deck 20, and towing the surface work equipment 1 with a towing vessel with the deck 20 floating on the sea surface. . At this time, the components of the wind power plant are mounted on the deck 20. As long as the deck 20 has a space in which the components of the side wind turbine 1 can be mounted and has mechanical strength, a vessel for transporting the components is not required for the movement of the components of the side wind turbine.

When the movement of the parts of the side wind power plant and the side work equipment 1 is completed, the pedestal 10 of the side work facility 1 is lowered against the deck 20, and the foot pole 10 is mounted on the seabed. At this time, as shown in FIG. 1, the pedestal 10 is lowered until the deck 20 moves away from the sea level and is positioned upward. Thereby, it is possible to construct a wind turbine generator without being affected by sea conditions.

After mounting the prism 10 on the seabed, the components on the deck 20 are suspended by the crane 30, and the wind power plant by the crane 30 is assembled. The crane 30 is mounted on the first protrusion 22 , and since the working range of the crane 30 is further expanded, smooth assembly is possible.

After assembling the wind power plant, the pedestal 10 is raised again with respect to the deck 20, and the towing ship returns the work plant 1 to the construction yard.

It is also possible to connect a plurality of surface work equipment 1 and use it as a construction yard for surface equipment construction for loading and unloading and assembling of parts of the surface equipment. The plan view of the construction yard using the some aspect work equipment 1 in FIG. 5 is shown.

The construction yard shown in FIG. 5 connects three surface work equipment 1 so that loading and unloading and assembly of the parts of the surface equipment can be performed on the deck 20. Since the crane 30 is mounted on the 1st protrusion part 22, a wider deck space can be ensured. Moreover, mutual interference is suppressed even if it is a case where the some crane 30 is operated simultaneously by arranging the side work equipment 1 so that the cranes 30 may be located alternately.

The construction yard can be installed for every project. By using the aspect work facility 1 as a construction yard, if a yard work is complete|finished, the aspect work facility 1 can be moved to the construction sea area of a aspect facility as it is, and the aspect facility can be constructed. The construction yard can also be used as port facilities. In this way, by using the side work equipment 1 as a construction yard, it becomes a substitute for the port facility for side installations, and a construction yard can be installed at low cost and in a short period of time.

In the above, representative embodiments of the present invention have been described as examples. The face work equipment (1) according to the present invention has a first protrusion (22), with respect to the existing face work equipment such as a self-lifting work pole or jack-up type excavation rig, having a main deck portion (21) and a pedestal (10) ) and the crane 30, and it can comprise by adding the 2nd protrusion part 23 further as needed. "Existing side work equipment" means a side work facility that has already been assembled so as to have the function intended for the side work facility, and the side work equipment (1) according to this form is such a side work facility. It can be modified and configured.

In general, conventional lifting equipment such as a self-elevating work pole and a jack-up type excavation rig is a self-elevating pole, and a platform supported so as to be able to move up and down with respect to the pole (the above-described face work equipment of this form (1) ) in the main deck portion 21).

So, by using (remodeling) the existing aspect work equipment to configure the aspect work facility according to the present invention, the footnote 10 and the main deck portion 21 are respectively formed using the footnote and platform of the structure of the existing aspect work facility. configurable. Thereby, it is possible to obtain an aspect work facility more simply and in a shorter period of time, and as a result, a significant cost reduction of the aspect work facility is achieved. In particular, by constructing the surface work facility (1) using the existing jack-up type excavation rig, the construction is carried out stably without being affected by the waves by locating the foot poles during surface construction in the sea area where the water depth exceeds 90 m. It is possible to obtain a side work equipment that can be done more easily and in a shorter period of time.

Moreover, the jack-up type excavation rig has a shipboard excavation facility so that the excavation work of petroleum or natural gas can be performed in the state that it was mounted and settled from the side. The shipboard excavation facility is mounted on a cantilever installed on a platform. However, the cantilever moves on the platform by the driving mechanism and excavates at a position protruding from the platform. In order to support the load of the entire cantilever including such a driving mechanism and an onboard excavation facility, the platform has a strength member such as a bulkhead having a necessary strength inside as a supporting structure.

This form pays attention to this point and, when comprising the 1st protrusion part 22, uses the support structure of the cantilever which the existing jack-up type excavation rig has. That is, the 1st protrusion part 22 is supported by the support structure of a cantilever, and protrudes from the main deck part 21. As shown in FIG. Here, the "cantilever support structure" is a support structure that the platform has in order to support the load of the entire cantilever including the above-described driving mechanism and onboard excavation facility, and specifically, it is necessary to support the entire cantilever. A strength member having strength, for example, a partition wall. In this way, by using the support structure originally existing in the jack-up type excavation rig, for example, mechanical strength sufficient to mount the crane 30 capable of lifting a heavy structure such as a nacelle of a side wind power plant. The first protrusion 22 having ? can be added more simply in conformity with the existing strength member without adding a new strength member. As a result, significant cost reduction of the aspect work equipment is achieved.

In addition, as described above, when the first protrusion 22 is configured using the support structure of the cantilever of the jack-up type excavation rig, the cantilever of the jack-up type excavation rig and the onboard excavation facility are removed, and on the support structure of the cantilever. A first projection 22 is configured, on which the crane 30 is mounted. Accordingly, the side work equipment 1 no longer functions as an excavation rig.

Moreover, when the deck 20 is made into a multilayer structure in order to improve the mechanical strength of the deck 20, it is generally considered to replace the existing ceiling wall with the ceiling wall which has higher mechanical strength. However, in general, various structures such as electric wiring and water supply and drainage pipes are mounted on the lower surface of the ceiling wall. Therefore, when replacing the ceiling wall, it is necessary to replace these structures as well. Therefore, as shown in FIG. 4, by leaving the ceiling wall 20a as it is and arranging the second ceiling wall 120a above it, it is possible to utilize the existing electrical wiring and water supply and drainage pipes, and as a result, the side work facility ( While shortening the drying period of 1), the raise of drying cost can be suppressed.

1: Aspect work equipment
10: footnote
20 : Deck
20a: sky wall
20b: bottom wall
20c: outer wall
20d: bulkhead
21: Main Deck
22: first protrusion
23: second protrusion
30: crane
120a: second sky wall
120c: second outer circumferential wall

Claims (4)

A jack-up-type excavation rig having three or more prisms and a main deck in which the prisms are disposed, excavation facilities and cantilevers are removed;
An additional structure added to the main deck portion,
A side work facility having a crane mounted on the additional structure. The method of claim 1,
The meik deck part is configured as a floating body structure in which an internal space is formed,
The interior space is divided into a plurality of spaces by a partition wall, the side work equipment. 3. The method of claim 2,
The additional structure is supported on the main deck portion using the bulkhead, the side work equipment. The method of claim 1,
The main deck portion is a multi-layer structure, the side work equipment.

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