CN110144925B

CN110144925B - Fan system, jacket foundation and construction method thereof

Info

Publication number: CN110144925B
Application number: CN201910446491.5A
Authority: CN
Inventors: 毕明君; 刘东华; 官嫣嫣; 何小华; 马兆荣; 刘晋超; 任灏; 元国凯; 张力; 刘旭东
Original assignee: China Energy Engineering Group Guangdong Electric Power Design Institute Co Ltd
Current assignee: China Energy Engineering Group Guangdong Electric Power Design Institute Co Ltd
Priority date: 2019-05-27
Filing date: 2019-05-27
Publication date: 2021-08-13
Anticipated expiration: 2039-05-27
Also published as: CN110144925A

Abstract

The invention relates to a fan system, a jacket foundation and a construction method thereof. The bung hole of suction bucket is down, and first truss structure includes the outer tube and sets up the shutoff board in the outer tube, and the one end that the suction bucket was kept away from to the outer tube link up, and the suction bucket is kept away from to the shutoff board, and the shutoff board encloses into the grout chamber with the inner wall of outer tube. The second truss structure comprises an inner rod, and the inner rod is used for being inserted into the grouting cavity. The inner rod is connected with the outer pipe in a grouting mode, and the fan is arranged on the second truss structure. The fan system, the jacket foundation and the construction method thereof can enable the existing construction site, the transport ship and the lifting ship in China to meet the construction, transportation and lifting requirements of the jacket foundation in the engineering of the offshore deepwater zone.

Description

Fan system, jacket foundation and construction method thereof

Technical Field

The invention relates to the technical field of offshore wind power engineering, in particular to a fan system, a jacket foundation and a construction method thereof.

Background

The fan system comprises a fan foundation and a fan arranged on the fan foundation, and the jacket foundation is a common fan foundation form. For the sea area with shallow water depth, the water depth range of the sea area is below 30m, the volume of the jacket foundation is relatively small, so the difficulty of building, transporting and hoisting the jacket foundation is low, and the current domestic existing building site, transporting ship and hoisting ship can basically meet the requirements. For the engineering of offshore deepwater areas, the depth range of the sea area is 35-60 m, the volume of the jacket foundation is relatively large, and the existing construction site, transport ship and hoisting ship in China at present can hardly meet the requirements of the construction, transportation and hoisting of the jacket foundation.

Disclosure of Invention

Accordingly, there is a need to provide a jacket foundation, a jacket foundation construction method and a fan system including the jacket foundation, so that the existing construction site, transport ship and lifting ship in China can meet the requirements of construction, transportation and lifting of the jacket foundation in the engineering of offshore deepwater.

A jacket foundation comprising:

the seabed pile comprises a suction barrel and a first truss structure arranged on the suction barrel, wherein a barrel opening of the suction barrel faces downwards, the first truss structure comprises an outer pipe and a blocking plate arranged in the outer pipe, one end, far away from the suction barrel, of the outer pipe is communicated, the blocking plate is far away from the suction barrel, and a grouting cavity is defined by the blocking plate and the inner wall of the outer pipe; and

and the second truss structure comprises an inner rod, and the inner rod is inserted into the grouting cavity and connected with the outer pipe in a grouting manner.

The jacket foundation has at least the following advantages:

during construction, the inner rod and the outer pipe are connected in a grouting mode, so that the seabed piles and the second truss structure can be respectively constructed in different construction sites, the requirement for the construction sites is lowered, and the existing construction sites in China can meet the construction requirement of jacket foundations at present. During transportation, the seabed piles and the second truss structures are respectively transported to reduce the requirement on the transportation capacity of the transportation ship, so that the current domestic existing transportation ship can meet the transportation requirement of the jacket foundation. During hoisting, the seabed piles and the second truss structure are successively hoisted to reduce the requirement on the hoisting capacity of the hoisting ship, so that the current domestic existing hoisting ship can meet the hoisting requirement of the jacket foundation. And (3) sinking the seabed pile, pumping water out of the barrel cavity when the suction barrel sinks to the position near the seabed so as to form negative pressure in the barrel cavity, and inserting the suction barrel into the seabed under the action of the negative pressure so as to finish the installation of the seabed pile. The existence of the suction barrel can improve the applicability of the jacket foundation to complex engineering geological conditions, improve the construction efficiency of the jacket foundation and improve the economic benefit of the jacket foundation. And inserting the inner rod into the grouting cavity, and grouting and connecting the inner rod and the outer pipe to arrange the second truss structure on the first truss structure, so that the jacket foundation is installed.

The technical solution is further explained below:

in one embodiment, the first truss structure further includes a water injection pipe, the water injection pipe includes a first water injection section and a second water injection section, the blocking plate is provided with a first through hole, the first water injection section is inserted into the first through hole, the second water injection section is located above the blocking plate and located in the grouting cavity, and a lowest point of the second water injection section is lower than a highest point of the first water injection section.

In one embodiment, the second truss structure further includes a water inlet pipe, the water inlet pipe includes a first water inlet section and a second water inlet section bent with respect to the first water inlet section, the inner rod is formed with a hollow cavity, a second through hole is formed in a side wall of the inner rod, the first water inlet section is inserted into the second through hole and is used for being disposed in the grouting cavity, the second water inlet section is located in the hollow cavity, and the second water inlet section extends in a direction away from the blocking plate.

In one embodiment, the second truss structure further comprises a valve disposed at the top of the inner rod, the valve being in communication with the hollow cavity.

In one embodiment, the jacket foundation further includes a leveling ring, the leveling ring is configured to be disposed on the inner rod, and the leveling ring is configured to abut against the outer tube.

In one embodiment, the jacket foundation further includes a support member disposed on the outer tube, the support member is provided with a bell mouth communicated with the outer tube, an opening of the bell mouth far away from the outer tube is larger than an opening of the bell mouth close to the outer tube, and the support member is configured to support the leveling ring.

In one embodiment, the second truss structure further includes a first positioning protrusion and a supporting platform for supporting the fan, the number of the first positioning protrusions is at least two, at least two first positioning protrusions are arranged on the inner rod at intervals along the circumferential direction of the inner rod, the supporting platform is arranged on the inner rod, the number of the suction buckets is at least two, the number of the outer tubes is at least two, one outer tube is arranged on one suction bucket, the first truss structure further includes a first reinforcing structure, and the first reinforcing structure is arranged on two adjacent outer tubes.

In one embodiment, the second truss structure further includes at least two second reinforcing structures, the number of the inner rods is at least two, at least two second reinforcing structures are arranged on two adjacent inner rods, and the second reinforcing structures are distributed on the top and the bottom of the inner rods.

A fan system, comprising:

according to the jacket foundation, the inner rod is connected with the outer pipe in a grouting mode; and

and the fan is arranged on the second truss structure.

The fan system at least has the following advantages:

because the fan system comprises the jacket foundation and has the technical effect of the jacket foundation, the existing construction site, the transport ship and the lifting ship in China at present can meet the requirements of construction, transportation and lifting of the jacket foundation in the engineering of the offshore deepwater area.

A construction method of a jacket foundation comprises the following steps:

providing a suction bucket, building a first truss structure on the suction bucket to form a subsea pile;

constructing a second truss structure;

transporting the seabed piles and the second truss structure to an engineering sea area respectively;

lifting the seabed pile to enable the seabed pile to sink;

hoisting the second truss structure to enable the inner rod to be inserted into the grouting cavity;

so that the inner rod is connected with the outer pipe in a grouting way.

The construction method of the jacket foundation at least has the following advantages:

and (3) respectively constructing the submarine pile and the second truss structure in different construction sites so as to reduce the requirement on the construction sites, so that the current domestic existing construction sites can meet the construction requirement of jacket foundations. The submarine pile and the second truss structure are respectively transported to the engineering sea area by different transport ships so as to reduce the requirement on the transport capacity of the transport ships, and therefore the current domestic existing transport ships can meet the transport requirement of the jacket foundation. And lifting the submarine pile by using a lifting ship to sink the submarine pile, and lifting the second truss structure by using the lifting ship to insert the inner rod into the grouting cavity. The seabed piles and the second truss structure are hoisted in sequence to reduce the requirement on the hoisting capacity of the hoisting ship, so that the current domestic existing hoisting ship can meet the hoisting requirement of a jacket foundation. The inner rod is connected with the outer pipe in a grouting mode, so that the seabed pile and the second truss structure are connected into a whole, and a fan is arranged on the second truss structure conveniently.

Drawings

FIG. 1 is a front view of a jacket foundation according to one embodiment;

FIG. 2 is a top view of the suction bucket and first truss structure of FIG. 1;

FIG. 3 is a front view of the suction bucket, first truss structure and drain pump of FIG. 1, with slings shown;

FIG. 4 is an enlarged view of a portion of FIG. 3 at A;

FIG. 5 is a partial schematic view of the foundation of the jacket of FIG. 1;

FIG. 6 is another partial schematic view of the jacket base of FIG. 1 with a sling shown;

FIG. 7 is an enlarged view of a portion of FIG. 6 at B;

FIG. 8 is an enlarged view of a portion of FIG. 6 at C;

FIG. 9 is a top view of a valve, support platform, and second lifting lug according to one embodiment;

FIG. 10 is a schematic flow chart illustrating a method of constructing a jacket foundation according to one embodiment;

fig. 11 is a schematic flow chart illustrating a method of constructing a jacket foundation according to another embodiment.

Description of reference numerals:

10. the jacket comprises a jacket foundation, 20, a sling, 30, a sea water surface, 100, a suction bucket, 110, a bearing wall, 120, a side bucket wall, 130, a drainage pump, 200, a first truss structure, 210, an outer pipe, 211, a first inclined section, 212, a first vertical section, 220, a first reinforcing structure, 230, a plugging plate, 240, a water injection pipe, 241, a first water injection section, 242, a second water injection section, 250, a first lifting lug, 300, a second truss structure, 310, an inner rod, 311, a second vertical section, 312, a second inclined section, 313, a third vertical section, 320, a second reinforcing structure, 330, a water inlet pipe, 331, a first water inlet section, 332, a second water inlet section, 340, a valve, 350, a guide block, 361, a first positioning bulge, 362, a second positioning bulge, 370, a support table, 371, 372, an installation table, 380, a second lifting lug, 410, a leveling ring, 420 and a support.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as the present invention is capable of modification in various respects, all without departing from the spirit and scope of the present invention.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

Referring to fig. 1, a fan system in an embodiment for converting wind energy into electric energy can be installed in an engineering sea area with a depth of water in the sea area of 35m to 60 m. Specifically, the fan system includes a jacket base 10 and a fan disposed on the jacket base 10.

The jacket foundation 10 in one embodiment can be installed in an engineering sea area with a water depth ranging from 35m to 60 m. The construction, transportation and lifting operations of the jacket foundation 10 can be completed by using the existing construction site, transportation ship and lifting ship in China. The jacket base 10 includes a sea bottom pile and a second truss structure 300 disposed on the sea bottom pile.

Specifically, the subsea pile includes a suction bucket 100 and a first truss structure 200, where the first truss structure 200 is disposed on the suction bucket 100, and a bung of the suction bucket 100 faces downward. The second truss structure 300 is disposed on the first truss structure 200, and the second truss structure 300 is used to dispose a wind turbine.

Referring to fig. 2, the suction bucket 100 includes a bearing wall 110 and a side bucket wall 120 disposed on the bearing wall 110, wherein the bearing wall 110 and the side bucket wall 120 form a bucket cavity. When the suction bucket 100 is lowered to the vicinity of the seabed during installation, water in the bucket cavity can be discharged by using elements such as a pump and the like, so that negative pressure is formed in the bucket cavity, and under the action of the negative pressure, the side bucket wall 120 is inserted into the seabed, so that the suction bucket 100 can be lowered to a preset elevation under the action of the negative pressure, and the suction bucket 100 can be stably installed.

Referring to fig. 1 and 2, the jacket base 10 further includes a drain pump 130, the drain pump 130 is disposed on the suction bucket 100, and the drain pump 130 is used for draining water in the cavity of the bucket. In the embodiment, the drain pump 130 is disposed on the bearing wall 110, and the height of the drain pump 130 is higher, so as to increase the amount of the drained water. Of course, in other embodiments, the drainage pump 130 may also be disposed on the side tub wall 120. Alternatively, the drain pump 130 is not disposed on the suction bucket 100, and is in communication with the bucket cavity in a circumscribed manner.

The number of the suction buckets 100 is at least two, so that the installation stability of the jacket foundation 10 can be improved on one hand, and the seabed piles can be leveled in a mode of controlling the water discharging speed of different suction buckets 100 and the like on the other hand. In the present embodiment, the number of the suction buckets 100 is four. Of course, in other embodiments, the number of suction buckets 100 may be flexibly adjusted, such as three or five, etc.

Specifically, in this embodiment, the suction bucket 100 is a barrel, the suction bucket 100 is a steel bucket, the outer diameter of each suction bucket 100 is 8m to 12m, the height of each suction bucket 100 is 12m to 20m, and the shortest distance between the outer walls of two adjacent suction buckets 100 is 25m to 32 m. Of course, in other embodiments, the shape, material, diameter, height, etc. of the suction bucket 100 can be flexibly adjusted.

The first truss structure 200 is disposed on the load-bearing wall 110, and the first truss structure 200 includes an outer pipe 210, and the outer pipe 210 is used to support the second truss structure 300. The number of the outer tubes 210 is at least two, and one outer tube 210 is disposed on one suction bucket 100. In the present embodiment, the number of the outer tubes 210 is four, and the number of the outer tubes 210 corresponds to the number of the suction buckets 100 one to one. Of course, in other embodiments, the first truss structure 200 may also be disposed on the sidewall 120. The number of the outer tubes 210 can be flexibly adjusted, for example, three or five tubes.

Referring to fig. 2 to 4, further, the outer tube 210 includes a first inclined section 211 and a first vertical section 212, the first inclined section 211 is disposed on the bearing wall 110, and the first vertical section 212 is disposed on an end of the first inclined section 211 away from the bearing wall 110. In the present embodiment, the first vertical section 212 is welded to the first inclined section 211, ends of the first inclined section 211 far away from the bearing wall 110 are close to each other, and a slope range of the first inclined section 211 is 1/10-1/6.

Referring to fig. 3, the first truss structure 200 further includes a first reinforcing structure 220, the first reinforcing structure 220 is disposed on two adjacent outer pipes 210, and the first reinforcing structure 220 is used for enhancing the structural stability of the first truss structure 200. It should be noted that two adjacent outer tubes 210 should be viewed from the outer peripheral direction of the first reinforcing structure 220. For example, in the present embodiment, two adjacent outer tubes 210 can be counted from a clockwise direction or a counterclockwise direction in a top view.

Specifically, in the present embodiment, the first reinforcing structure 220 is in an "X" shape, and the first reinforcing structure 220 is welded to the outer tube 210. The single first reinforcing structure 220 includes at least two first reinforcing rods spliced in an "X" shape. The number of the first reinforcing structures 220 is four, and one first reinforcing structure 220 is disposed between two adjacent outer tubes 210. Of course, in other embodiments, the shape of the first reinforcing structure 220 can be flexibly adjusted, such as "+" shape, etc., and the number of the first reinforcing rods can also be flexibly adjusted, such as eight, etc.

Referring to fig. 2 to 4, the first truss structure 200 further includes a blocking plate 230, the blocking plate 230 is disposed in the outer tube 210, one end of the outer tube 210 far from the suction barrel 100 is through, the blocking plate 230 far from the suction barrel 100, the blocking plate 230 and an inner wall of the outer tube 210 define a grouting cavity, and the grouting cavity is used for containing grouting materials such as cement. In this embodiment, the blocking plate 230 is a circular plate, and the outer tube 210 is a cylindrical tube, so that the blocking plate 230 and the outer tube 210 are hermetically connected to prevent the leakage of the grouting material. Of course, in other embodiments, the shape of the blocking plate 230 and the outer tube 210 can be flexibly set.

The first truss structure 200 further includes a water injection pipe 240, and the water injection pipe 240 is used to inject seawater into the outer pipe 210 between the blocking plate 230 and the bearing wall 110 to increase the weight of the first truss structure 200, thereby facilitating the sinking of the first truss structure 200. It should be noted that, when the seawater is injected, the air in the outer tube 210 between the blocking plate 230 and the bearing wall 110 can be discharged through the water injection tube 240.

The water injection pipe 240 includes a first water injection section 241 and a second water injection section 242, a first through hole is formed in the blocking plate 230, the first water injection section 241 is arranged in the first through hole in a penetrating manner, the second water injection section 242 is located above the blocking plate 230 and located in the grouting cavity, and the lowest point of the second water injection section 242 is lower than the highest point of the first water injection section 241.

Since the second water injection section 242 is located above the blocking plate 230 and located in the grouting cavity, when the first truss structure 200 sinks, seawater is injected into the outer tube 210 between the blocking plate 230 and the bearing wall 110 through the grouting cavity, the second water injection section 242 and the first water injection section 241 in sequence. Since the lowest point of the second water injection section 242 is lower than the highest point of the first water injection section 241, the grouting material does not enter the outer tube 210 between the blocking plate 230 and the bearing wall 110 through the second water injection section 242 and the first water injection section 241 in sequence during grouting. And because the second water injection section 242 is located in the grouting cavity, after grouting, the grouting material can block the second water injection section 242, preventing the seawater in the outer tube 210 between the blocking plate 230 and the bearing wall 110 from running off.

In the present embodiment, the water injection pipe 240 has a substantially inverted "J" shape as a whole. The number of the water injection pipes 240 is at least one, and when the number of the water injection pipes 240 is more than two, the water injection speed can be increased. Of course, in other embodiments, the shape of the water injection pipe 240 may be flexibly designed, for example, the water injection pipe 240 may be substantially "U" shaped as a whole. Or the first water injection section 241 is in an "|" shape, and the second water injection section 242 is in a wave shape.

Referring to fig. 3 and 4, the first truss structure 200 further includes a first lifting lug 250, and the first lifting lug 250 is disposed on the outer pipe 210. The number of the first lifting lugs 250 is at least two so that the first truss structure 200 is vertically sunk. During lifting, the sling 20 is connected to the first lifting lug 250. In the present embodiment, the first lifting lug 250 is disposed near the blanking plate 230, and the first lifting lug 250 is disposed at an outer side of the first vertical section 212. Of course, in other embodiments, the number and the position of the first lifting lugs 250 can be flexibly selected according to actual situations.

Referring to fig. 1 and 5, the second truss structure 300 includes an inner rod 310, and the inner rod 310 is used for supporting the fan. The inner rod 310 is adapted to be inserted into the grouting cavity and connected to the outer tube 210 in a grouting manner. During installation, the inner rod 310 is inserted into the grouting cavity, and the inner rod 310 and the outer pipe 210 are connected by grouting, so that the second truss structure 300 is disposed on the first truss structure 200, thereby completing the installation of the jacket foundation 10.

Referring to fig. 6, the number of the inner rods 310 is at least two to enhance the structural stability of the second reinforcement structure. In the present embodiment, the number of the inner rods 310 is four. Of course, in other embodiments, the number of the inner rods 310 may be flexibly set, such as three or five.

Referring to fig. 6 and 7, further, the inner rod 310 includes a second vertical section 311 and a second inclined section 312, the second vertical section 311 is used for grouting connection with the outer tube 210, and the second inclined section 312 is disposed on an end of the second vertical section 311 away from the outer tube 210. In the present embodiment, the second inclined section 312 is welded on the second vertical section 311, ends of the second inclined section 312 far away from the second vertical section 311 are close to each other, and the slope range of the second inclined section 312 is 1/10-1/6.

Referring to fig. 6, the second truss structure 300 further includes a second reinforcing structure 320, at least two second reinforcing structures 320 are disposed on two adjacent inner bars 310, and the second reinforcing structures 320 are used for enhancing the structural stability of the second truss structure 300. It should be noted that two adjacent inner bars 310 should be seen from the outer circumference direction of the second reinforcing structure 320. For example, in the present embodiment, two adjacent inner bars 310 may be counted from a clockwise direction or a counterclockwise direction in a top view.

In this embodiment, two second reinforcing structures 320 are disposed on two adjacent inner bars 310, so that the amount of work for the second truss structure 300 can be reduced, the complexity of the second truss structure 300 can be reduced, and the construction cost of the second truss structure 300 can be reduced. Of course, in other embodiments, one or more second reinforcement structures 320 may be disposed on two adjacent inner bars 310.

Referring to fig. 1 and 6, the second reinforcing structures 320 are disposed at the top and bottom of the inner rod 310. When the second truss structure 300 is installed, the second reinforcing structures 320 distributed on the top of the inner rod 310 are located above the sea surface 30 and spaced apart from the sea surface 30. The second reinforcing structure 320 distributed at the bottom of the inner rod 310 is located below the sea level 30 and spaced apart from the sea level 30. The design of the second reinforcing structure 320 distributed at the top and bottom of the inner rod 310 can reduce the wave load borne by the second truss structure 300, thereby reducing the stress at the connection of the second reinforcing structure 320 and the inner rod 310.

Specifically, in the present embodiment, the second reinforcing structure 320 is "X" shaped, and the second reinforcing structure 320 is welded to the inner rod 310. The single second reinforcement structure 320 includes at least two second reinforcement bars that are spliced to form an "X" shape. The number of the second reinforcing structures 320 is eight, and two second reinforcing structures 320 are disposed between two adjacent outer tubes 210. Of course, in other embodiments, the shape and number of the second reinforcing structures 320 can be flexibly adjusted.

Referring to fig. 6 and 7, the second truss structure 300 further includes a water inlet pipe 330, the inner rod 310 is formed with a hollow cavity, and the water inlet pipe 330 is used for injecting seawater into the hollow cavity to increase the weight of the second truss structure 300, thereby facilitating the sinking of the second truss structure 300. The water inlet pipe 330 includes a first water inlet section 331 and a second water inlet section 332 bent relative to the first water inlet section 331, a second through hole is formed in the side wall of the inner rod 310, the first water inlet section 331 penetrates through the second through hole, and the second water inlet section 332 is located in the hollow cavity. When seawater is injected, seawater is injected into the hollow cavity through the first and second water inlet sections 332 in sequence.

The first section 331 of intaking is used for setting up in the grout intracavity, and the second section 332 of intaking extends along the direction of keeping away from shutoff board 230, and this design is convenient for first section 331 of intaking is located grouting face down, and the second section 332 of intaking is kept away from the one end of shutoff board 230 and is located grouting face, and usable grouting material shutoff first section 331 of intaking on the one hand, on the other hand can prevent that grouting material from getting into the cavity via inlet tube 330. In this embodiment, the inlet pipe 330 is angular. Of course, in other embodiments, the shape of the inlet pipe 330 can be flexibly set, and it is sufficient to keep the highest point of the second inlet section 332 higher than the highest point of the first inlet section 331.

Referring to fig. 6 and 8, the second truss structure 300 further includes a valve 340, and the valve 340 is communicated with the hollow cavity. When seawater is injected into the hollow cavity, the valve 340 is opened to communicate the hollow cavity with the external environment, so that air in the hollow cavity can be discharged through the valve 340 in the process of injecting the seawater. After the seawater is injected, the valve 340 is closed to prevent the outside air from entering the hollow cavity, thereby preventing the cavity wall of the hollow cavity from being corroded to a certain extent. In this embodiment, the valve 340 is disposed on the top of the inner rod 310, which is beneficial to discharging air and injecting a large amount of seawater. Of course, in other embodiments, the valve 340 may be omitted and a vent may be formed in the inner rod 310.

Referring to fig. 6 and 7, the second truss structure 300 further includes a guide block 350, the guide block 350 is disposed at one end of the inner rod 310 for being inserted into the grouting cavity, and an outer contour of the guide block 350 is gradually reduced along a direction away from the inner rod 310 so as to be conveniently inserted into the grouting cavity. Wherein, the outer contour of the guide block 350 is reduced uniformly or in steps. In this embodiment, the guide block 350 is welded to the end surface of the inner rod 310, the guide block 350 has a taper, and the taper of the guide block 350 is 1: 1.

The second truss structure 300 further includes at least two first positioning protrusions 361, and the at least two first positioning protrusions 361 are disposed on the inner rod 310 at intervals along the circumferential direction of the inner rod 310. When second truss structure 300 sinks, first location arch 361 gets into the grout chamber along with interior pole 310, and the existence of first location arch 361 can prevent interior pole 310 excessively to be close to the chamber wall in grout chamber to guarantee the axiality of second vertical section 311 and first vertical end, thereby be convenient for fan level setting. In the present embodiment, the number of the first positioning projections 361 is eight. Of course, in other embodiments, the number of the first positioning protrusions 361 can be flexibly set, such as seven or nine.

The second truss structure 300 further includes second positioning protrusions 362, the second positioning protrusions 362 and the first positioning protrusions are distributed at intervals along the length direction of the second vertical section 311, the number of the second positioning protrusions 362 is at least two, and at least two second positioning protrusions 362 are arranged on the inner rod 310 at intervals along the circumferential direction of the inner rod 310. The second positioning protrusion 362 functions similarly to the first positioning protrusion, and is not described in detail herein. The presence of the second positioning protrusion 362 and the first positioning protrusion is beneficial to further ensure the coaxiality of the second vertical section 311 and the first vertical end.

Referring to fig. 6 and 9, the second truss structure 300 further includes a support platform 370 for supporting the fan, and the support platform 370 is disposed on the inner rod 310. The support base 370 includes a support frame 371 and an installation base 372 disposed on the support frame 371. In this embodiment, the support frame 371 is an "X" shaped steel box girder, and four corner points of the "X" shaped steel box girder are respectively disposed on the four inner rods 310. The mounting table 372 is in a circular truncated cone shape, and the mounting table 372 is connected with a tower flange of the fan.

Referring to fig. 6, 8 and 9, the second truss structure 300 further includes a second lifting lug 380, and the second lifting lug 380 is disposed on the inner pole 310. The number of the second lifting lugs 380 is at least two so that the second truss structure 300 is vertically sunk. When lifting, the sling 20 is connected with the second lifting lug 380. In this embodiment, the inner rod 310 further includes a third vertical segment 313, and the third vertical segment 313 is disposed at an end of the second inclined segment 312 away from the second vertical segment 311. The second lifting lug 380 is disposed on the third vertical section 313. Of course, in other embodiments, the second lifting lug 380 can be flexibly selected according to actual situations. The third vertical section 313 may be omitted.

Referring to fig. 1, 4 and 5, the jacket foundation 10 further includes a leveling ring 410, the leveling ring 410 is disposed on the inner rod 310, and the leveling ring 410 is disposed against the outer pipe 210. After the first truss structure 200 is installed, if the first vertical section 212 is in the vertical direction, the leveling ring 410 is horizontally disposed on the inner rod 310, so as to ensure that the vertical axis of the fan is vertical. After the first truss structure 200 is installed, if the first vertical section 212 is inclined, the leveling ring 410 is inclined on the inner rod 310, so as to ensure that the vertical axis of the fan is vertical. Of course, in other embodiments, the leveling ring 410 may be omitted and the second truss structure 300 may be supported by the containment plate 230. Alternatively, an abutment block for abutting against the outer tube 210 is provided on the inner rod 310.

Referring to fig. 1 and 5, the jacket base 10 further includes a support member 420, the support member 420 is disposed on the outer pipe 210, and the support member 420 is used for supporting the leveling ring 410 to prevent the second truss structure 300 from being excessively sunk. The support member 420 is formed with a flared opening communicating with the outer tube 210, and an opening of the flared opening far from the outer tube 210 is larger than an opening of the flared opening near the outer tube 210, so that the inner rod 310 is inserted into the outer tube 210. In the embodiment, the flare opening has a taper, and the taper range is 1:1 to 1: 0.5. Of course, in other embodiments, the taper of the flare may vary. When the leveling ring 410 is omitted, the support 420 may be used to support the abutment block. Alternatively, the support member 420 may be omitted.

In this embodiment, the center of gravity of the jacket base 10 exceeds 40m, the overall height of the jacket base 10 is approximately 100m, and the overall mass is approximately 3500 t. During the sinking of the jacket foundation 10, the suction bucket 100 may be used for primary leveling, and then the leveling ring 410 may be used for secondary leveling. In the blower system, the inner pole 310 is grouted to the outer tube 210, and the blower is installed on the second truss structure 300.

Referring to fig. 10, a method for constructing a jacket foundation in an embodiment includes the following steps:

s100, providing a suction bucket, and building a first truss structure on the suction bucket to form a seabed pile.

The suction bucket may be purchased off-the-shelf directly or built at a construction site. The first truss structure may be vertically built on the suction bucket.

And S200, building a second truss structure.

Step S100 may be performed before step S200, or step S100 may be performed after step S200, or step S100 and step S200 may be performed simultaneously. Steps S100 and S200 may be performed at different construction sites to reduce the requirements for the construction sites, so that the construction sites currently existing in China can meet the construction requirements for the jacket foundation. Of course, step S100 and step S200 may be performed in the same construction site. In this embodiment, the subsea pile requires vertical construction and final assembly when being constructed, and the second truss structure can be constructed in a vertical or horizontal direction according to the construction site and construction capacity.

And S300, respectively transporting the seabed piles and the second truss structure to an engineering sea area. The submarine pile and the second truss structure are respectively transported to the engineering sea area by different transport ships so as to reduce the requirement on the transport capacity of the transport ships, and therefore the current domestic existing transport ships can meet the transport requirement of the jacket foundation. Of course, the same transport vessel may be used to transport the subsea pile and the second truss structure in tandem. In this embodiment, the subsea piles are transported vertically. The second truss structure may be selected to be transported vertically or horizontally according to the performance of the transport vessel and the shipment condition of the construction site.

And S400, lifting the submarine pile to enable the submarine pile to sink. Specifically, the sling is connected with the first lifting lug so as to enable the seabed pile to sink. In the process of sinking the submarine pile, seawater is injected into the outer pipe between the plugging plate and the bearing wall through the water injection pipe so as to be conveniently arranged in the submarine pile to sink. When the suction bucket sinks to the position near the seabed, the drainage pump discharges the seawater in the cavity of the bucket, so that the side bucket wall gradually penetrates into the seabed to be fixed.

And S500, hoisting the second truss structure to enable the inner rod to be inserted into the grouting cavity. And in the process of sinking the second truss structure, the valve is opened, and seawater is injected into the hollow cavity through the water inlet pipe, so that the second truss structure sinks. The second truss structure is sunk so that the inner rod can be inserted into the grouting cavity. After the inner rod is inserted into the grouting cavity, the valve is closed, on one hand, seawater is prevented from being continuously injected into the hollow cavity, and on the other hand, the cavity wall of the hollow cavity is prevented from being corroded.

The seabed piles and the second truss structure are hoisted in sequence to reduce the requirement on the hoisting capacity of the hoisting ship, so that the current domestic existing hoisting ship can meet the hoisting requirement of a jacket foundation.

And S600, grouting and connecting the inner rod and the outer pipe. The inner rod is connected with the outer pipe in a grouting mode, so that the seabed pile and the second truss structure are connected into a whole, and a fan is arranged on the second truss structure conveniently. In this embodiment, a high strength grouting material having a 28d compressive strength of more than 120MPa is poured into the grouting cavity until it overflows from the grouting cavity. After grouting, the water injection pipe and the water inlet pipe are plugged by grouting materials.

Referring to fig. 11, the main difference between the method for constructing a jacket foundation in another embodiment and the method for constructing a jacket foundation in the present embodiment is:

step S410 is further included after step S400, the setting position of the leveling ring on the inner rod is adjusted according to the elevation of the support. By measuring the elevation of the support member, it can be determined whether the seafloor pile is inclined. If the seabed pile is not inclined, the leveling ring is horizontally arranged on the inner rod; if the seabed pile inclines, the leveling ring is also obliquely arranged on the inner rod, so that the vertical axis of the fan is ensured to be vertical.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A jacket foundation, comprising:

the submarine pile comprises a suction barrel and a first truss structure arranged on the suction barrel, wherein a barrel mouth of the suction barrel faces downwards, the first truss structure comprises an outer pipe and a blocking plate arranged in the outer pipe, one end, far away from the suction barrel, of the outer pipe is communicated, the blocking plate is far away from the suction barrel, the blocking plate and the inner wall of the outer pipe enclose a grouting cavity, the first truss structure further comprises a water injection pipe, the water injection pipe is used for injecting water to the outer pipe, the water injection pipe comprises a first water injection section and a second water injection section, a first through hole is formed in the blocking plate, the first water injection section is arranged in the first through hole in a penetrating mode, the second water injection section is located above the blocking plate and located in the grouting cavity, and the lowest point of the second water injection section is lower than the highest point of the first water injection section; and

2. A jacket foundation according to claim 1, wherein the first truss structure further comprises a first lifting lug disposed on the outer tube.

3. The jacket foundation of claim 1, wherein the second truss structure further comprises a water inlet pipe, the water inlet pipe comprises a first water inlet section and a second water inlet section bent relative to the first water inlet section, the inner rod is formed with a hollow cavity, a side wall of the inner rod is provided with a second through hole, the first water inlet section is arranged in the second through hole in a penetrating manner and is used for being arranged in the grouting cavity, the second water inlet section is located in the hollow cavity, and the second water inlet section extends in a direction away from the plugging plate.

4. A jacket foundation according to claim 3, wherein the second truss structure further comprises a valve disposed at the top of the inner rod, the valve communicating with the hollow cavity.

5. A jacket foundation as claimed in claim 1, further comprising a leveling ring for being disposed on the inner rod and for abutting against the outer tube.

6. A jacket foundation according to claim 5, further comprising a support member disposed on the outer tube, wherein the support member defines a flare opening communicating with the outer tube, an opening of the flare opening away from the outer tube is larger than an opening of the flare opening close to the outer tube, and the support member is configured to support the leveling ring.

7. The jacket foundation of any one of claims 1 to 6, wherein the second truss structure further comprises at least two first positioning protrusions and a support platform for supporting a fan, the number of the first positioning protrusions is at least two, the at least two first positioning protrusions are arranged on the inner rod at intervals along the circumferential direction of the inner rod, the support platform is arranged on the inner rod, the number of the suction buckets is at least two, the number of the outer tubes is at least two, one outer tube is arranged on one suction bucket, and the first truss structure further comprises a first reinforcing structure arranged on two adjacent outer tubes.

8. A jacket foundation according to any one of claims 1 to 6, wherein the second truss structure further comprises second reinforcing structures, the number of the inner rods is at least two, at least two second reinforcing structures are arranged on two adjacent inner rods, and the second reinforcing structures are distributed at the top and the bottom of the inner rods.

9. A fan system, comprising:

the jacket foundation of any one of claims 1 to 8, the inner rod being grouted into connection with the outer tube; and

and the fan is arranged on the second truss structure.

10. A method of constructing a jacket foundation according to any one of claims 1 to 8, comprising the steps of:

constructing a second truss structure;

lifting the seabed pile to enable the seabed pile to sink;

so that the inner rod is connected with the outer pipe in a grouting way.