CN215442042U

CN215442042U - Anti-scouring device for offshore wind power single-pile foundation

Info

Publication number: CN215442042U
Application number: CN202120862448.XU
Authority: CN
Inventors: 祝文龙; 徐海滨
Original assignee: China Three Gorges Corp
Current assignee: China Three Gorges Corp
Priority date: 2021-04-25
Filing date: 2021-04-25
Publication date: 2022-01-07
Anticipated expiration: 2031-04-25

Abstract

The utility model provides an offshore wind-power single pile basis anti-scour device, it includes the jet pump, the drainage pipeline, drainage unit and truss, through set up the jet pump in the single pile side, a plurality of drainage unit distribute in single pile scour prevention region all around, the truss is connected with drainage unit, drainage pipeline's branch pipe and drainage unit are connected, be responsible for and be connected with the jet pump, the fretwork section of drainage unit is located below the bed mud face, the isolated top water of bed mud face is hugged closely to the helmet, bed soil body pore water gathers into the person in charge and follows the person in charge and follow the jet pump water inlet end and discharge outside the water outlet end, thereby bed soil body pore water discharge is greater than the infiltration volume and produces the consolidation. The offshore wind power single-pile foundation protection construction method overcomes the problems that the original offshore wind power single-pile foundation protection construction period is long, the foundation is damaged by throwing during construction, and the cost is high, accelerates foundation bed soil layer consolidation, inhibits scouring phenomenon, improves the safety performance of the offshore wind power single-pile foundation, and has the characteristics of simple structure, good stability, low cost, and simplicity and convenience in operation.

Description

Anti-scouring device for offshore wind power single-pile foundation

Technical Field

The utility model belongs to the technical field of offshore wind power foundations, and relates to an anti-scouring device for an offshore wind power single-pile foundation.

Background

With the rapid development and expansion of offshore wind power plants, the steel pipe pile foundation has the characteristics of high single-pile bearing capacity, relatively simple pile sinking process, small soil discharge amount, good bending resistance and the like, and becomes one of the important basic forms of offshore wind power.

Because the original hydrological conditions such as the landform of a seabed, a flow field, a flow velocity and the like are changed by constructing the steel pipe pile foundation, waves, tides and the like are obstructed by the pile columns to generate streaming, the flow velocity of ocean currents around the steel pipe pile is accelerated, the shearing stress of a seabed bed surface in a local range is increased, scouring is generated when the shearing stress exceeds the starting shearing stress of bed sand, the pile foundation is exposed out of the seabed due to the development of a scouring pit, the holding force of the seabed to a fan structure is weakened, and serious challenges are brought to the stability of the foundation and the safe operation of an offshore wind turbine generator. At present, offshore wind power plants are mostly built in oceans with water depths of several meters to dozens of meters, and in engineering monitoring of a plurality of offshore wind power plants, the phenomenon of scouring of different degrees of a viscous seabed and a non-viscous seabed is found, and the local scouring depth can reach several meters or even more than ten meters. In order to ensure the stable structure of the single-pile foundation, the foundation needs to be protected against scour in offshore wind power construction and operation.

The existing protection measures also comprise methods of underwater riprapping in a certain range around the pile to form a reversed filter layer, laying a surface soil body of a gravity type sand ballast bed surface to prevent soil body from being eroded by wave flow, reinforcing the strength of the soil body around the foundation through grouting and the like. However, these engineering measures usually require a large amount of material consumption, have a long construction period and high cost, and easily damage the surface anticorrosive coating of the pile foundation during construction. The observation shows that the problems of secondary scouring still exist after the methods such as stone throwing, gravity type sand quilt and the like are worked, and the protection effect is not as expected.

Disclosure of Invention

The utility model aims to solve the technical problem of providing an offshore wind power single pile foundation anti-scouring device which is simple in structure, a jet pump is arranged on the side face of a single pile, a plurality of drainage units are distributed in an anti-scouring area around the single pile, a truss is connected with the drainage units, branch pipes of a drainage pipeline are connected with the drainage units, a main pipe is connected with the jet pump, hollow sections of the drainage units are positioned at the lower part of a bottom bed mud surface, a protective cap is tightly attached to the bottom bed mud surface to isolate an upper water body, pore water is discharged from a water inlet end to the outside of a water outlet end of the jet pump along the main pipe, the pore water discharge amount of a bottom bed soil body is larger than the seepage amount, the bottom bed soil layer consolidation is accelerated, the scouring phenomenon is inhibited, the safety performance of an offshore wind power single pile foundation is improved, the stability is good, the cost is low, and the operation is simple and convenient.

In order to solve the technical problems, the technical scheme adopted by the utility model is as follows: an offshore wind power single-pile foundation anti-scouring device comprises a jet pump, a drainage pipeline, a drainage unit and a truss; the main pipe of the drainage pipeline is connected with the jet pump, the branch pipes are connected with the main pipe, the branch pipes are respectively connected with the drainage units, the drainage units are distributed around the jet pump by taking the jet pump as the center, and the truss is connected with the drainage units; the branch pipe leads water in the drainage unit into the main pipe and then the water is discharged by the jet pump.

The drainage pipeline comprises a plurality of branch pipes connected with a main pipe, and when the distribution form of the drainage units changes, the main pipe extends to be close to the drainage units.

The drainage unit comprises a protective cap connected with the hollow cylinder, the water outlet is positioned on one side of the upper part of the protective cap and communicated with the hollow cylinder, and the hollow cylinder positioned on the lower part of the protective cap is a hollow section.

The hollow section of the hollow cylinder body is wrapped with geotextile, and a steel wire mesh is wrapped outside the geotextile.

The protective cap is of a conical structure, and the conical bottom with the larger cross section faces downwards.

The trusses are rectangular frame structures, the trusses are located at each end of a main pipe of the H-shaped structure, and the drainage units are located at the lower portions of the trusses and vertically connected with the trusses.

The trusses are of a triangular frame structure, the trusses are distributed on the sides of a main pipe of the rectangular structure, and the drainage units are located on the lower portions of the trusses and vertically connected with the top points of the trusses.

The truss is of a circular frame structure, a plurality of uniformly distributed drainage units are vertically connected with the truss and located on the lower side, and a main pipe of the circular frame structure is located on the inner side or the outer side of the truss.

A plurality of drainage units are arranged on the outer side of the truss in a circular ring shape.

An offshore wind power single-pile foundation anti-scouring device comprises a jet pump, a drainage pipeline, a drainage unit and a truss; the main pipe of the drainage pipeline is connected with the jet pump, the branch pipes are connected with the main pipe, the branch pipes are respectively connected with the drainage units, the drainage units are distributed around the jet pump by taking the jet pump as the center, and the truss is connected with the drainage units; the branch pipe leads water in the drainage unit into the main pipe and then the water is discharged by the jet pump. Simple structure, through set up the jet pump in the single pile side, a plurality of drainage unit distribute in single pile scour prevention region all around, the truss is connected with drainage unit, drainage pipe's branch pipe and drainage unit are connected, be responsible for and be connected with the jet pump, drainage unit's fretwork section is located end bed mud face lower part, the isolated top water of end bed mud face is hugged closely to the helmet, the hole water is responsible for and is discharged to the play water end outside along being responsible for from the jet pump end of intaking through drainage unit and branch pipe convergence, end bed soil body hole water discharge capacity is greater than the infiltration volume, bottom bed soil layer concreties with higher speed, the emergence of the phenomenon of restraining to erode, improve the security performance on marine wind-powered electricity generation single pile basis, good stability, low cost, easy operation is convenient.

In a preferred embodiment, the drain line includes a plurality of branch pipes connected to the main pipe, and the main pipe extends close to the drain units when the distribution pattern of the drain units is changed. Simple structure, when in use, pore water overflowing from the drainage unit enters the main pipe along the branch pipe and is discharged by the jet pump.

In a preferred scheme, the drainage unit comprises a protective cap connected with a hollow cylinder, the water outlet is positioned on one side of the upper part of the protective cap and communicated with the hollow cylinder, and the hollow cylinder positioned on the lower part of the protective cap is a hollow section. Simple structure, during the use, the end bed earth is arranged in to the cavity cylinder, and the helmet hugs closely earth, makes helmet top water isolated with the mud face, and inside the hollow section infiltration cavity cylinder of pore water follow cavity cylinder in the earth.

In a preferred scheme, the hollowed-out section of the hollow cylinder body is wrapped with geotextile, and a steel wire mesh is wrapped outside the geotextile. The structure is simple, when in use, the geotextile coated on the hollow section of the hollow cylinder effectively blocks the silt particles from entering the hollow cylinder, reduces deposition and avoids blocking pipelines; the steel wire mesh is wrapped outside the geotextile to prevent the geotextile from losing efficacy due to the fact that the drainage unit is scratched by sharp sandstone in the process of placing soil in.

In a preferred scheme, the protective cap is of a conical structure, and a conical bottom with a larger section faces downwards. Simple structure, the great one end in cross-section of the helmet that is located the toper structure is hugged closely with earth surface, has enlarged the scope of protection earth, effectively isolated upper portion water gets into the helmet lower part.

In a preferred scheme, the trusses are rectangular frame structures, a plurality of trusses are positioned at each end of a main pipe of the H-shaped structure, and a plurality of drainage units are positioned at the lower parts of the trusses and vertically connected with the trusses. Simple structure, during the use, rectangular frame structure's truss is the array and lays around the single pile, is the main pipe of H type structure each end and extends to each truss lower part, puts into the drainage unit in earth and is connected with the truss, improves holistic structural strength.

In a preferred scheme, the trusses are triangular frame structures, a plurality of trusses are distributed on each side of a main pipe of the rectangular structure, and a plurality of drainage units are located at the lower parts of the trusses and vertically connected with the vertexes of the trusses. Simple structure, when laying, one of them apex angle of truss is towards the single pile center, and the truss is connected with the drainage cell around the single pile respectively, and stability is good.

In a preferred scheme, the truss is of a circular frame structure, a plurality of uniformly distributed drainage units are vertically connected with the truss on the lower side, and a main pipe of the circular frame structure is located on the inner side or the outer side of the truss. The drainage unit that simple structure during the use is located around the single pile is the ring shape and lays, and the truss and the drainage unit of ring frame structure are connected, and the person in charge and the drainage unit of ring frame structure, at the drainage in-process, the distance of drainage unit to jet pump keeps unanimous, is favorable to the pore water in the balanced drainage unit of each, makes the bed soil layer concretion tend to the equilibrium.

In a preferred scheme, a plurality of drainage units are arranged outside the truss in a circular ring shape. Simple structure, during the use, lay a plurality of drainage unit outside the truss, be favorable to further expanding earth pore water infiltration volume, further accelerate the bed soil layer consolidation speed.

The utility model provides an offshore wind-power single pile basis anti-scouring device, it includes the jet pump, water drainage pipeline, drainage unit and truss, through set up the jet pump in the single pile side, a plurality of drainage unit distribute in single pile scour prevention region all around, the truss is connected with drainage unit, drainage pipeline's branch pipe and drainage unit are connected, be responsible for and be connected with the jet pump, drainage unit's fretwork section is located end bed mud face lower part, the isolated top water of end bed mud face is hugged closely to the helmet, discharge to outside the water outlet end along being responsible for from the jet pump end of intaking through the hole water, thereby end bed soil body hole water discharge is greater than the infiltration volume and produces the consolidation. The offshore wind power single-pile foundation protection construction method overcomes the problems that the original offshore wind power single-pile foundation protection construction period is long, the foundation is damaged by throwing during construction, and the cost is high, accelerates consolidation of a foundation bed soil layer, inhibits scouring, improves the safety performance of the offshore wind power single-pile foundation, and has the characteristics of simple structure, good stability, low cost, and simplicity and convenience in operation.

Drawings

The utility model is further illustrated by the following examples in conjunction with the accompanying drawings:

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is another schematic structural diagram of the present invention.

Fig. 3 is another schematic structural diagram of the present invention.

Fig. 4 is a use state diagram of the present invention.

In the figure: the water-saving drainage device comprises a jet pump 1, a drainage pipeline 2, a main pipe 21, branch pipes 22, a drainage unit 3, a hollow column 31, a protective cap 32, a water outlet 33, a steel wire mesh 34 and a truss 4.

Detailed Description

As shown in fig. 1 to 4, an offshore wind power single-pile foundation anti-scouring device comprises a jet pump 1, a drainage pipeline 2, a drainage unit 3 and a truss 4; the main pipe 21 of the drainage pipeline 2 is connected with the jet pump 1, the branch pipes 22 are connected with the main pipe 21, the branch pipes 22 are respectively connected with the drainage units 3, the drainage units 3 are distributed around the jet pump 1 by taking the jet pump 1 as a center, and the truss 4 is connected with the drainage units 3; the branch pipe 22 introduces water in the drain unit 3 into the main pipe 21 and then discharges the water by the jet pump 1. Simple structure, through set up jet pump 1 in the single pile, a plurality of drainage unit 3 distribute in single pile scour prevention region all around, truss 4 is connected with drainage unit 3, the branch pipe 22 and the drainage unit 3 of drainage pipeline 2 are connected, it is connected with jet pump 1 to be responsible for 21, drainage unit 3's fretwork section is located end bed mud face lower part, the isolated top water of end bed mud face is hugged closely to helmet 32, discharge to the water outlet end outside along being responsible for 21 from jet pump 1 end of intaking through the hole water, end bed soil body hole discharge capacity is greater than the infiltration volume, bottom bed soil layer concreties with higher speed, the emergence of the phenomenon of washing away is restrained, the security performance on marine wind-powered electricity generation single pile basis is improved, good stability, low cost, and easy operation is convenient.

Preferably, the power of the jet pump 1 is provided by a wind turbine generator, and the power transmission distance is shortened.

In a preferred embodiment, the drain pipeline 2 includes a plurality of branch pipes 22 connected to the main pipe 21, and when the distribution pattern of the drain units 3 is changed, the main pipe 21 extends close to the drain units 3. Simple structure, when in use, pore water overflowing from the drainage unit 3 enters the main pipe 21 along the branch pipe 22 and is discharged by the jet pump 1.

Preferably, during installation, the main pipe 21 is directly placed on the upper portion of the soil, installation is convenient and fast, and cost is saved.

Preferably, the main pipe 21 extends close to the drain unit 3, which facilitates shortening the distance between the branch pipe 22 and the drain unit 3.

In a preferred scheme, the drainage unit 3 comprises a protective cap 32 connected with a hollow cylinder 31, a water outlet 33 is positioned on one side of the upper part of the protective cap 32 and communicated with the hollow cylinder 31, and the hollow cylinder 31 positioned on the lower part of the protective cap 32 is a hollow section. Simple structure, during the use, the end bed earth is arranged in to cavity cylinder 31, and the helmet 32 hugs closely earth, makes the helmet 32 top water isolated with the mud face, and the hole water in the earth is inside from the fretwork section infiltration cavity cylinder 31 of cavity cylinder 31.

In a preferred scheme, the hollowed-out section of the hollow cylinder 31 is wrapped with geotextile, and is located outside the geotextile and wrapped with a steel wire mesh 34. The structure is simple, when in use, the geotextile coated on the hollow section of the hollow cylinder 31 effectively blocks the silt particles from entering the hollow cylinder 31, thereby reducing deposition and avoiding blocking pipelines; the steel wire mesh 34 is wrapped outside the geotextile to prevent the geotextile from losing efficacy due to the fact that the drainage unit 3 is scratched by sharp gravels in the process of placing the geotextile in soil.

In a preferred embodiment, the protective cap 32 has a tapered structure, and a tapered bottom with a larger cross section faces downward. Simple structure, the great one end in cross-section of the helmet 32 that is located the toper structure is hugged closely with earth surface, has enlarged the scope of protection earth, effectively isolated upper portion water gets into the helmet 32 lower part.

In a preferred embodiment, the trusses 4 are rectangular frame structures, a plurality of trusses 4 are located at each end of the main pipe 21 of the H-shaped structure, and a plurality of drainage units 3 are located at the lower portions of the trusses 4 and vertically connected thereto. Simple structure, during the use, truss 4 of rectangular frame structure is the array and lays around the single pile, is the main pipe 21 each end of H type structure and extends to each truss 4 lower part, and the drainage unit 3 of putting into earth is connected with truss 4, improves holistic structural strength.

In a preferred embodiment, the trusses 4 are triangular frame structures, a plurality of trusses 4 are distributed on each side of the main pipe 21 of the rectangular structure, and a plurality of drainage units 3 are located at the lower parts of the trusses 4 and vertically connected with the vertexes thereof. Simple structure, when laying, one of them apex angle of truss 4 is towards the single pile center, and truss 4 is connected with the drainage cell 3 respectively around the single pile, and stability is good.

In a preferred scheme, the truss 4 is a circular frame structure, a plurality of uniformly distributed drainage units 3 are vertically connected with the circular frame structure at the lower side, and a main pipe 21 of the circular frame structure is positioned at the inner side or the outer side of the truss 4. Simple structure, during the use, the drainage unit 3 that is located around the single pile is the ring shape and is laid, and the truss 4 and the drainage unit 3 of ring shape frame construction are connected, and the person in charge 21 and the drainage unit 3 of ring shape structure, at the drainage in-process, the distance of drainage unit 3 to jet pump 1 keeps unanimous, is favorable to the pore water in each drainage unit 3 of balanced discharge, makes the consolidation of foundation bed soil layer tend to the equilibrium.

In a preferred embodiment, a plurality of drainage units 3 are arranged outside the truss 4 in a circular ring shape. Simple structure, during the use, lay a plurality of drainage unit 3 outside truss 4, be favorable to further expanding earth pore water infiltration volume, further accelerate the bed soil layer consolidation speed.

As above, offshore wind power single pile foundation anti-scouring device, when installing and using, set up jet pump 1 in the single pile side, a plurality of drainage unit 3 distribute in single pile anti-scouring area all around, truss 4 is connected with drainage unit 3, branch pipe 22 and the drainage unit 3 of drainage pipeline 2 are connected, be responsible for 21 and be connected with jet pump 1, drainage unit 3's fretwork section is located the bed mud face lower part, the isolated top water body of bed mud face is hugged closely to helmet 32, pore water is followed and is responsible for 21 and is discharged outside the water outlet from jet pump 1 inlet end, bed soil body pore water discharge amount is greater than the infiltration volume, bottom soil layer consolidation is accelerated, restrain the emergence of scouring phenomenon, the security performance of improvement wind power single pile foundation, good stability, low cost, easy operation is convenient.

When in use, pore water overflowing from the drainage unit 3 enters the main pipe 21 along the branch pipe 22 and is discharged by the jet pump 1.

During the use, cavity cylinder 31 is arranged in end bed earth, and the helmet 32 hugs closely earth, makes the water and the mud face isolated above the helmet 32, and the inside hollow section infiltration of the hollow section of cavity cylinder 31 of pore water in the earth.

When in use, the geotextile covering the hollow section of the hollow cylinder 31 effectively blocks the silt particles from entering the hollow cylinder 31, reduces deposition and avoids blocking pipelines; the steel wire mesh 34 is wrapped outside the geotextile to prevent the geotextile from losing efficacy due to the fact that the drainage unit 3 is scratched by sharp gravels in the process of placing the geotextile in soil.

The larger end of the section of the protective cap 32 with the conical structure is tightly attached to the surface of soil, so that the range of protecting the soil is expanded, and the upper water body is effectively isolated from entering the lower part of the protective cap 32.

When the drainage device is used, the trusses 4 of the rectangular frame structure are arranged around the single pile in an array mode, each end of the main pipe 21 of the H-shaped structure extends to the lower portion of each truss 4, the drainage unit 3 placed in soil is connected with the trusses 4, and the overall structural strength is improved.

When the drainage system is arranged, one vertex angle of the truss 4 faces to the center of the single pile, and the truss 4 is connected with the drainage units 3 around the single pile respectively, so that the stability is good.

When the drainage device is used, the drainage units 3 positioned around the single pile are distributed in a circular ring shape, the truss 4 of the circular ring frame structure is connected with the drainage units 3, and the main pipe 21 of the circular ring structure and the drainage units 3 keep consistent distance from the drainage units 3 to the jet pump 1 in the drainage process, so that pore water in each drainage unit 3 can be drained uniformly, and the soil layer consolidation of the bottom bed tends to be uniform.

When the water drainage device is used, the plurality of water drainage units 3 arranged outside the truss 4 are beneficial to further enlarging the soil pore water infiltration amount and further accelerating the consolidation speed of the soil layer of the foundation bed.

The above-described embodiments are merely preferred embodiments of the present invention, and should not be construed as limiting the present invention, and features in the embodiments and examples in the present application may be arbitrarily combined with each other without conflict. The protection scope of the present invention is defined by the claims, and includes equivalents of technical features of the claims. I.e., equivalent alterations and modifications within the scope hereof, are also intended to be within the scope of the utility model.

Claims

1. The utility model provides an offshore wind-power single pile basis anti-scour device which characterized by: the device comprises a jet pump (1), a drainage pipeline (2) and a drainage unit (3); the main pipe (21) of the drainage pipeline (2) is connected with the jet pump (1), the branch pipes (22) are connected with the main pipe (21), the branch pipes (22) are respectively connected with the drainage units (3), and the drainage units (3) are distributed around the jet pump (1) by taking the jet pump (1) as a center; the branch pipe (22) leads water in the drainage unit (3) into the main pipe (21) and then discharges the water by the jet pump (1).

2. An offshore wind power single pile foundation anti-scour arrangement as claimed in claim 1, wherein: the drainage pipeline (2) comprises a plurality of branch pipes (22) connected with a main pipe (21), and when the distribution form of the drainage units (3) changes, the main pipe (21) extends to be close to the drainage units (3).

3. An offshore wind power single pile foundation anti-scour arrangement as claimed in claim 1, wherein: the drainage unit (3) comprises a protective cap (32) connected with the hollow column body (31), a water outlet (33) is positioned on one side of the upper part of the protective cap (32) and communicated with the hollow column body (31), and the hollow column body (31) positioned on the lower part of the protective cap (32) is a hollow section.

4. An offshore wind power single pile foundation anti-scour arrangement as claimed in claim 3, wherein: the hollow section of the hollow cylinder (31) is wrapped with geotextile, and a steel wire mesh (34) is wrapped outside the geotextile.

5. An offshore wind power single pile foundation anti-scour arrangement as claimed in claim 3, wherein: the protective cap (32) is of a conical structure, and the conical bottom with a larger section faces downwards.

6. An offshore wind power single pile foundation anti-scour arrangement as claimed in claim 1, wherein: the water drainage system is characterized by further comprising trusses (4), wherein the trusses (4) are of rectangular frame structures, the trusses (4) are located at each end of a main pipe (21) of the H-shaped structure, and the water drainage units (3) are located at the lower portions of the trusses (4) and are vertically connected with the trusses.

7. An offshore wind power single pile foundation anti-scour arrangement as claimed in claim 6, wherein: the trusses (4) are of a triangular frame structure, the trusses (4) are distributed on each side of a main pipe (21) of the rectangular structure, and the drainage units (3) are located on the lower portions of the trusses (4) and are vertically connected with the top points of the trusses.

8. An offshore wind power single pile foundation anti-scour arrangement as claimed in claim 6, wherein: the truss (4) is of a circular frame structure, a plurality of uniformly distributed drainage units (3) are vertically connected with the truss (4) and located on the lower side of the truss, and a main pipe (21) of the circular frame structure is located on the inner side or the outer side of the truss (4).

9. An offshore wind power single pile foundation anti-scour arrangement as claimed in claim 8, wherein: and a plurality of drainage units (3) are arranged on the outer side of the truss (4) in a circular ring shape.