CN108978733B - Anti-scouring structure for offshore single-pile foundation and installation method of anti-scouring structure - Google Patents
Anti-scouring structure for offshore single-pile foundation and installation method of anti-scouring structure Download PDFInfo
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- CN108978733B CN108978733B CN201810824403.6A CN201810824403A CN108978733B CN 108978733 B CN108978733 B CN 108978733B CN 201810824403 A CN201810824403 A CN 201810824403A CN 108978733 B CN108978733 B CN 108978733B
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Abstract
The invention discloses an anti-scouring structure for an offshore single-pile foundation and an installation method of the anti-scouring structure, and the anti-scouring structure for the offshore single-pile foundation comprises the following steps: the ballast part is arranged on the surface of the sea bed and comprises a pressure-bearing section and a winding section, the pressure-bearing section is arranged at an interval with a support column of the single-pile foundation and comprises a first end and a second end which are opposite, the first end is arranged at an interval with the support column, the second end is arranged close to the support column, the second end is connected with one end of the winding section, and the winding section is overlapped and wound by taking the support column as a winding center according to a preset number of turns so that the winding section can cover the first end along the direction from the second end to the first end; and the fixing piece is used for fixing the other end of the winding section on the surface of the seabed. The edge end of the anti-scouring structure for the offshore single-pile foundation can be stably fixed on the surface of the sea bed.
Description
Technical Field
The invention relates to the technical field of offshore wind power engineering, in particular to an anti-scouring structure for an offshore single-pile foundation and an installation method of the anti-scouring structure.
Background
The single-pile foundation is used as a foundation form which is most widely adopted in the field of offshore wind power engineering. At present, a wind field with the water depth within 25m is mainly in the form of a fixed single-pile fan foundation. However, the single-pile foundation has a too large pile diameter, so that the problem of erosion prevention of the foundation is serious, and the safety of the single-pile fan foundation is seriously reduced on the basis of not arranging an erosion prevention protection facility.
At present, the anti-scouring structure of a single-pile foundation is complex in construction and weak in wind and wave resistance, and after typhoon or severe sea conditions pass, the anti-scouring structure is often damaged and needs to be laid again, so that the later maintenance cost is high.
Disclosure of Invention
Based on this, there is a need for an anti-erosion structure for offshore single-pile foundations, which can be stably fixed on a sea bed surface, and particularly, which can resist typhoon and severe sea conditions, and improve the anti-erosion capability of the anti-erosion structure for offshore single-pile foundations; the installation method of the anti-scouring structure can realize the installation of the anti-scouring structure.
The specific technical scheme is as follows:
in one aspect, the present application relates to an anti-scour structure for an offshore mono-pile foundation, comprising: the ballast part is arranged on the surface of the sea bed and comprises a pressure-bearing section and a winding section, the pressure-bearing section is arranged at an interval with a support column of a single-pile foundation, the pressure-bearing section comprises a first end and a second end which are opposite, the first end and the support column are arranged at an interval according to a first preset interval, the second end and the support column are arranged at an interval according to a second preset interval, the first end is far away from the support column, the second end is close to the support column, the second end is connected with one end of the winding section, and the winding section is overlapped and wound by taking the support column as a winding center according to preset turns, so that the winding section can cover the first end along the direction from the second end to the first end; and the fixing piece is used for fixing the other end of the winding section on the surface of the seabed.
When the anti-scouring structure for the offshore single-pile foundation is used, the pressure-bearing section and the support columns are arranged at intervals, the first ends and the support columns are arranged at intervals according to a first preset interval, the second ends and the support columns are arranged at intervals according to a second preset interval, the first ends are far away from the support columns, and the second ends are close to the support columns, so that a pressure-bearing structure is formed; the second end is connected with one end of the winding section, the winding section is overlapped and wound by taking the supporting column as a winding center according to a preset number of turns, so that the winding section can cover the first end along the direction from the second end to the first end, and at the moment, the winding section fixes the first end on the surface of the seabed by means of self-weight, so that the winding section is used as an edge end of the anti-scouring structure for the offshore single-pile foundation and is not easy to shift when being scoured by seawater; furthermore, when the offshore single-pile foundation scour prevention structure is used, the other end of the winding section is fixed on the seabed surface through the fixing piece, so that the other edge end of the scour prevention structure used as the offshore single-pile foundation is not easy to shift when being scoured by seawater; further, this an scour prevention structure for marine single pile basis is circular form, and just has two edge ends, and when the sea water erodees, the steadiness is more firm than the scour prevention structure of traditional square, and the scour prevention effect is better. Therefore, the edge end of the anti-scouring structure of the offshore single-pile foundation can be stably fixed on the surface of the sea bed, so that the anti-scouring capability of the anti-scouring structure of the offshore single-pile foundation is improved; meanwhile, the whole anti-scouring structure for the offshore single-pile foundation only depends on the dead weight of the ballast part and the fixing part to realize the anti-scouring function, and the cost is low.
The technical solution is further explained below:
in one embodiment, the bearing section comprises a starting point section, the starting point section is arranged at the first end, the starting point section is arranged at a distance from the supporting column, and the distance between the starting point section and the supporting column is 10m-15 m. So, can promote this an anti-scour structure's that is used for marine single pile basis scour prevention ability.
In one embodiment, the anti-scour structure for the offshore single-pile foundation further comprises at least two first filling members, the starting section is a first flexible pipe, the first flexible pipe is provided with at least one first dividing member, the first dividing member divides the first flexible pipe into at least two first containing lattices, the first filling members are in one-to-one correspondence with the first containing lattices, and the first filling members are arranged in the first containing lattices. Therefore, the first flexible pipe is divided into at least two first containing grids through the first dividing piece, each first filling piece is arranged in each first containing grid, at the moment, the first filling pieces are prevented from being completely stacked at one position, and the anti-scouring effect of the anti-scouring structure for the offshore single-pile foundation is reduced; further, first initial stage is first flexible pipe, and first flexible pipe can make first packing piece can the tiling in first flexible pipe because the deformability of self, and first packing piece distributes more evenly, and this moment, avoids first flexible pipe local uplift to appear, if local uplift appears in first flexible pipe, can lead to appearing the clearance between pressure-bearing section end and the coiling end, and then leads to appearing being protected sand and is drawn empty the phenomenon, influences the stability of whole single pile foundation 10.
In one embodiment, the volume of the first filling member is 25 to 40% of the volume of the first containing compartment. Thus, within this scope, on the one hand, the first filling element can be laid flat in the first receiving compartment; on the other hand, in this within range, when the coiling section covers at the initial section, the coiling section can be with the more firm fixing of initial section on the sea bed face, and the interval value of coiling section and sea bed face is less, avoids being located below the coiling section and sand is dug out, promotes the stability of whole single pile basis 10.
In one embodiment, the anti-erosion structure for the offshore single pile foundation further comprises at least two second filling pieces, the pressure bearing section further comprises a connecting section, one end of the connecting section is connected with the first end, the other end of the connecting section is the second end, the connecting section is a second flexible pipe, the second flexible pipe is provided with at least one second dividing piece, the second dividing piece divides the second flexible pipe into at least two second containing grids, the second filling pieces correspond to the second containing grids one to one, and the second filling pieces are arranged in the second containing grids. Therefore, the second flexible pipe is divided into at least two second containing grids through the second dividing piece, and each second filling piece is arranged in each second containing grid, so that the second filling pieces are prevented from being completely accumulated at one position, and the anti-scouring effect of the whole anti-scouring structure for the offshore single-pile foundation is reduced; further, the linkage segment is the second flexible pipe, and the second flexible pipe can make the second packing piece can the tiling in the second flexible pipe because the deformability of self, and the second packing piece distributes more evenly, and this moment, avoid the second flexible pipe local uplift to appear, if the second flexible pipe local uplift appears, can lead to appearing the clearance between pressure-bearing section end and the coiling end, and then lead to appearing being protected the sand and being dug out the phenomenon, influence the stability of whole single pile foundation 10.
In one embodiment, the volume of the second filling member is 50 to 75% of the volume of the second containing compartment. Thus, within this scope, on the one hand, the second filling element can be laid flat in the second receiving compartment; on the other hand, in this range, the volume of the connecting section is larger than that of the initial section, so the self weight of the connecting section is larger, and at this time, the anti-scouring capability of the pressure-bearing section is better.
In one embodiment, the anti-scouring structure for the offshore single-pile foundation further comprises at least two third filling pieces, the winding section is a third flexible pipe, the third flexible pipe is provided with at least one third dividing piece, the third dividing piece divides the third flexible pipe into at least two third containing grids, the third filling pieces correspond to the third containing grids one to one, and the third filling pieces are arranged in the third containing grids. Therefore, the third flexible pipe is divided into at least two third containing grids through the third dividing piece, and each third filling piece is arranged in each third containing grid, so that the third filling pieces are prevented from being completely accumulated at one position, and the anti-scouring effect of the whole anti-scouring structure for the offshore single-pile foundation is reduced; further, the coiling section is the third flexible pipe, and the third flexible pipe can make the third packing piece can the tiling in the third flexible pipe because the deformability of self, and the third packing piece distributes more evenly, and this moment, avoids the third flexible pipe local uplift to appear, if the third flexible pipe local uplift appears, can lead to the bearing section end and the coiling end between the clearance appearing, and then leads to appearing being protected the sand and is dug empty phenomenon, influences the stability of whole single pile foundation.
In one embodiment, the volume of the third filling member is 80 to 90% of the volume of the third containing compartment. Thus, within this scope, on the one hand, the third filling element can be laid flat in the third receiving compartment; on the other hand, in this within range, the volume of coiling section is greater than the volume of pressure-bearing section, therefore, the weight of coiling section is greater than the weight of initial section (the weight of pressure-bearing section), and at this moment, the coiling section can rely on self dead weight to compact initial section or whole pressure-bearing section, makes the interval value of coiling section and sea bed face less, avoids being located below the coiling section and the sand is dug out, promotes the stability of whole single pile foundation.
In one embodiment, the anti-scouring structure for the offshore single pile foundation further comprises at least two fourth filling members, the other end of the winding section is a tapered fourth flexible pipe, the diameter of the large end of the fourth flexible pipe is 1.3-2 times that of the small end of the fourth flexible pipe, the fourth flexible pipe is provided with at least one fourth dividing member, the fourth dividing member divides the fourth flexible pipe into at least two fourth containing grids, the fourth filling members correspond to the fourth containing grids one to one, the fourth filling members are arranged in the fourth containing grids, and the volume of the fourth filling members is 40-60% of that of the fourth containing grids.
On one hand, the application also relates to an installation method of the anti-scouring structure, which comprises the following steps:
arranging a pressure-bearing section of a pressure-bearing piece and a support column of a single-pile foundation at intervals, arranging a first end of the pressure-bearing section and the support column at intervals according to a first preset interval, arranging a second end of the pressure-bearing section and the support column at intervals according to a second preset interval, and keeping the first end away from the support column and keeping the second end close to the support column;
the winding section of the pressure loading part is overlapped and wound by taking the support column as a winding center according to a preset number of turns, so that the winding section can cover the first end along the direction from the second end to the first end;
and fixing the other end of the winding section on the surface of the sea bed by using a fixing piece.
When the installation method of the anti-scouring structure is used, the pressure-bearing section of the pressure-bearing piece and the support column of the single-pile foundation are arranged at intervals, so that the subsequent winding section has enough space to complete the winding step; determining the arrangement positions of a first end of the pressure-bearing end and a second end of the pressure-bearing end according to the position of a supporting column of the single-pile foundation; then, the winding section of the pressure carrier is overlapped and wound by taking the support column as a winding center according to a preset number of turns, so that the winding section can cover the first end along the direction from the second end to the first end, and the first end is fixed on the surface of the seabed by the self weight of the winding end, so that the winding section is used as the edge end of the anti-scouring structure for the offshore single-pile foundation and is not easy to shift when being scoured by seawater; and finally, the other end of the winding section is fixed on the sea bed surface through the fixing piece, so that the other edge end of the scour prevention structure used for the offshore single-pile foundation is not easy to shift when being scoured by seawater.
Drawings
FIG. 1 is a top view of a mono-pile foundation;
FIG. 2 is a view of the single pile foundation of FIG. 1 in the direction A-A;
FIG. 3 is a view from the B-B direction of the single pile foundation in FIG. 1;
fig. 4 is a flow chart of a method of installation of the anti-scour structure.
Description of reference numerals:
10. the offshore single-pile foundation comprises a single-pile foundation 100, an anti-scouring structure for the offshore single-pile foundation 110, a ballast part 112, a pressure bearing section 114, a winding section 120, a fixing part 200, a support column 300, a cable 400 and a seabed surface.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and the detailed description. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the 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 "secured to" 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.
It will be understood that when an element is referred to as being "secured to" another element, it can be integral with the other element or can be removably connected to the other element.
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 herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Further, it is to be understood that, in the present embodiment, the positional relationships indicated by the terms "lower", "upper", "front", "rear", "left", "right", "inner", "outer", "top", "bottom", "one side", "the other side", "one end", "the other end", and the like are based on the positional relationships shown in the drawings; the terms "first," "second," and the like are used herein to distinguish one structural element from another. These terms are merely for convenience in describing the present invention and for simplicity in description, and are not to be construed as limiting the present invention.
As shown in fig. 1, an anti-scour structure 100 for an offshore mono-pile foundation in one embodiment comprises: the ballast part 110 is arranged on the seabed surface 400, the ballast part 110 comprises a pressure-bearing section 112 and a winding section 114, the pressure-bearing section 112 and the supporting columns 200 of the single-pile foundation 10 are arranged at intervals, the pressure-bearing section 112 comprises a first end and a second end which are opposite, the first end and the supporting columns 200 are arranged at intervals according to a first preset interval, the second end and the supporting columns 200 are arranged at intervals according to a second preset interval, the first end is far away from the supporting columns 200, the second end is close to the supporting columns 200, the second end is connected with one end of the winding section 114, the winding section 114 is arranged in a stacking and winding mode by taking the supporting columns 200 as winding centers according to preset turns, and the winding section 114 can cover the pressure-bearing section 112 along the direction from the second; and a fixing member 120, wherein the fixing member 120 is used for fixing the other end of the winding section 114 on the seabed surface 400.
When the anti-scouring structure 100 for the offshore single-pile foundation is used, the pressure-bearing section 112 and the support columns 200 are arranged at intervals, the first ends and the support columns 200 are arranged at intervals according to a first preset interval, the second ends and the support columns 200 are arranged at intervals according to a second preset interval, the first ends are far away from the support columns 200, and the second ends are close to the support columns 200, so that a pressure-bearing structure is formed; the second end is connected with one end of the winding section 114, the winding section 114 is overlapped and wound by taking the supporting column 200 as a winding center according to the preset number of turns, so that the winding section 114 can cover the pressure-bearing section 112 along the direction from the second end to the first end, at the moment, the winding section 114 fixes the pressure-bearing end on the seabed surface 400 by self dead weight, and the first end is also fixed on the seabed surface 400 through the winding section 114, therefore, the anti-scouring structure 100 used for the offshore single pile foundation is used as an edge end, and is not easy to shift when being scoured by seawater; further, when in use, the other end of the winding section 114 is fixed on the seabed surface 400 by the fixing member 120, so that the other edge end of the anti-scouring structure 100 as the offshore single pile foundation is not easy to shift when being scoured by seawater; further, this an anti-scour structure 100 for marine single pile basis is circular form, and only two marginal ends, and when the sea water erodees, the steadiness is more firm than traditional square anti-scour structure, and the anti-scour effect is better. As can be seen, the edge end of the anti-scour structure 100 for the offshore single-pile foundation can be stably fixed on the seabed surface 400, so that the anti-scour capability of the anti-scour structure 100 for the offshore single-pile foundation is improved; meanwhile, the whole anti-scouring structure 100 for the offshore single pile foundation only depends on the self weights of the ballast part 110 and the fixing part 120 to realize the anti-scouring function, and the cost is low. In this embodiment, the side walls of each winding section 114 are attached, so as to improve the impact resistance of the winding end, and further improve the anti-scouring capability of the entire anti-scouring structure 100 for the offshore single pile foundation. In this embodiment, the fixing member 120 is a sandbag.
On the basis of the above embodiment, the pressure-bearing section 112 includes a starting point section, the starting point section is disposed at the first end, the starting point section is disposed at an interval from the supporting column 200, and the interval between the starting point section and the supporting column 200 is 10m-15 m. Therefore, on one hand, when the distance between the starting section and the supporting column 200 is 10m-15m, the winding section 114 is convenient to be wound in an overlapping manner by taking the supporting column 200 as a winding center according to a preset number of turns; on the other hand, when the distance between the initial section and the supporting column 200 is 10m-15m, the bearing end has enough length to be covered by the winding section 114, so that the anti-scouring capability of the anti-scouring structure 100 for the offshore mono-pile foundation can be improved. In this embodiment, the winding section 114 is overlapped and wound around the support column 200 as the winding center according to the preset number of turns, so that the winding section 114 can cover the bearing section 112 from the second end to the first end, and thus, the whole bearing section 112 is more stably arranged on the sea bed surface 400 under the action of gravity of the winding section 114, and further, the anti-erosion capability of the anti-erosion structure 100 for the marine single-pile foundation is improved. Specifically, the distance between the initial section and the supporting column 200 may be 10m, 12m, 14m or 15m, and in this embodiment, the distance between the initial section and the supporting column 200 may be 12m, at which time the anti-erosion capability of the anti-erosion structure 100 for the offshore mono-pile foundation is the best.
On the basis of any one of the above embodiments, the anti-erosion structure 100 for the offshore single-pile foundation further includes at least two first filling members, the starting point section is a first flexible pipe, the first flexible pipe is provided with at least one first dividing member, the first dividing member divides the first flexible pipe into at least two first containing lattices, the first filling members correspond to the first containing lattices one to one, and the first filling members are arranged in the first containing lattices. Therefore, the first flexible pipe is divided into at least two first containing grids through the first dividing piece, and each first filling piece is arranged in each first containing grid, so that the first filling pieces are prevented from being completely accumulated at one position, and the anti-scouring effect of the whole anti-scouring structure 100 for the offshore single-pile foundation is reduced; further, first initial segment is first flexible pipe, and first flexible pipe can make first packing piece can the tiling in first flexible pipe because the deformability of self, and first packing piece distributes more evenly, and this moment, avoids first flexible pipe local uplift to appear, if local uplift appears in first flexible pipe, can lead to appearing the clearance between bearing section 112 end and the coiling end, and then leads to appearing being protected the sand and is drawn empty the phenomenon, influences the stability of whole single pile foundation 10. On the basis of this embodiment, the volume of the first filling member is 25% to 40% of the volume of the first containing compartment. Thus, within this scope, on the one hand, the first filling element can be laid flat in the first receiving compartment; on the other hand, in this range, when the winding section 114 covers the initial section, the winding section can fix the initial section on the seabed surface 400 more firmly, and the distance between the winding section 114 and the seabed surface 400 is less, so as to avoid the sand below the winding section 114 from being hollowed, and improve the stability of the whole single-pile foundation 10. Specifically, the volume of the first filling member may be 25%, 30%, 35% or 40% of the volume of the first containing compartment; in this embodiment, the volume of the first packing member is 40% of the volume of the first receiving space, and the anti-erosion effect of the anti-erosion structure for the offshore mono-pile foundation 10 structure is the best.
On the basis of any one of the above embodiments, the anti-erosion structure 100 for the offshore single-pile foundation further comprises at least two second filling members, the pressure-bearing section 112 further comprises a connecting section, one end of the connecting section is connected with the first end, the other end of the connecting section is a second end, the connecting section is a second flexible pipe, the second flexible pipe is provided with at least one second dividing member, the second dividing member divides the second flexible pipe into at least two second containing grids, the second filling members correspond to the second containing grids one to one, and the second filling members are arranged in the second containing grids. Therefore, the second flexible pipe is divided into at least two second containing grids through the second dividing piece, and each second filling piece is arranged in each second containing grid, so that the second filling pieces are prevented from being completely accumulated at one position, and the anti-scouring effect of the whole anti-scouring structure 100 for the offshore single-pile foundation is reduced; further, the linkage segment is the second flexible pipe, and the second flexible pipe can make the second packing piece can the tiling in the second flexible pipe because the deformability of self, and the second packing piece distributes more evenly, and this moment, avoid the second flexible pipe local uplift to appear, if local uplift appears in the second flexible pipe, can lead to appearing the clearance between bearing section 112 end and the coiling end, and then lead to appearing being protected the sand and being dug out the phenomenon, influence whole single pile foundation structure's stability. On the basis of this embodiment, the volume of the second filling member is 50% to 75% of the volume of the second containing compartment. Thus, within this scope, on the one hand, the second filling element can be laid flat in the second receiving compartment; on the other hand, in this range, the volume of the connecting section is larger than that of the initial section, and therefore, the self weight of the connecting section is large, and at this time, the anti-erosion capability of the pressure-receiving section 112 is good. In this embodiment, the volume of the second filling member is 60% of the volume of the second containing grid, and at this time, the anti-scouring effect of the whole anti-scouring structure for the offshore mono-pile foundation is the best. Specifically, the volume of the second packing member may be 50%, 55%, 60%, 70%, or 75% of the volume of the second containing compartment; in this embodiment, the connection section is provided in the same direction as the distribution direction of the cables 300 buried under the seabed surface 400, and at this time, the connection section can protect the cables 300.
On the basis of any one of the above embodiments, the anti-erosion structure 100 for the offshore single-pile foundation further includes a third filling member, the winding section 114 is a third flexible pipe, the third flexible pipe is provided with at least one third dividing member, the third dividing member divides the third flexible pipe into at least two third containing cells, and the third filling member is disposed in the third containing cells. Therefore, the third flexible pipe is divided into at least two third containing grids through the third dividing piece, and each third filling piece is arranged in each third containing grid, so that the third filling pieces are prevented from being completely accumulated at one position, and the anti-scouring effect of the whole anti-scouring structure 100 for the offshore single-pile foundation is reduced; further, coiling section 114 is the third flexible pipe, and the third flexible pipe can make the third packing piece can the tiling in the third flexible pipe because the deformability of self, and the third packing piece distributes more evenly, and this moment, avoid the third flexible pipe local uplift to appear, if the local uplift appears in the third flexible pipe, can lead to appearing the clearance between pressure-bearing section 112 end and the coiling end, and then lead to appearing being protected the sand and being dug out the phenomenon, influence the stability of whole single pile foundation 10. On the basis of this embodiment, the volume of the third packing member is 80% to 90% of the volume of the third containing compartment. Thus, within this scope, on the one hand, the third filling element can be laid flat in the third receiving compartment; on the other hand, in this range, the volume of coiling section is greater than the volume of pressure-bearing section 112, therefore, the weight of coiling section is greater than the weight of initial section (the weight of pressure-bearing section 112), and at this moment, coiling section 114 can rely on self dead weight to compact initial section or whole pressure-bearing section 112, makes the interval value of coiling section 114 and sea bed face 400 less, avoids being located coiling section 114 below and the sand is dug out, promotes the stability of whole single pile basis 10 structure. Specifically, the volume of the third packing member may be 80%, 85% or 90% of the volume of the third containing compartment. In this embodiment, the volume of the third filling member is 85% of the volume of the third containing grid, at this time, the stability of the whole mono-pile foundation is optimal, and the anti-erosion effect of the whole anti-erosion structure for the offshore mono-pile foundation is optimal.
On the basis of any one of the above embodiments, the anti-erosion structure 100 for the offshore single-pile foundation further comprises a fourth filling member, the other end of the winding section 114 is a tapered fourth flexible pipe, the diameter of the large end of the fourth flexible pipe is 1.3-2 times that of the small end, the fourth flexible pipe is provided with at least one fourth dividing member, the fourth dividing member divides the fourth flexible pipe into at least two fourth containing grids, the fourth filling member is arranged in the fourth containing grids, and the volume of the fourth filling member is 40% -60% of the volume of the fourth containing grids. Thus, within this scope, on the one hand, the fourth filling element can be laid flat in the fourth receiving compartment; on the other hand, in the range, the tail end of the winding end has larger weight, so that the tail end of the winding end is prevented from shifting in the process of seawater scouring, and the anti-scouring capability of the pressure-bearing section 112 is better; furthermore, the other end of the winding section 114 is a tapered fourth flexible pipe, and the diameter of the large end of the fourth flexible pipe is 1.3-2 times that of the small end, so as to increase the volume of the tail end of the winding end as much as possible and further increase the dead weight of the tail end of the winding section 114 as much as possible. Specifically, the large end diameter of the fourth flexible tube may be 1.3 times, 1.5 times, 1.7 times or 2 times the small end diameter, and the volume of the fourth packing may be 40%, 50% or 60% of the volume of the fourth receiving compartment. In this embodiment, the diameter of the large end of the fourth flexible pipe is 1.5 times of the diameter of the small end, and the volume of the fourth filling member is 50% of the volume of the fourth containing grid, so that the stability of the whole single-pile foundation is optimal, and the anti-erosion effect of the anti-erosion structure for the offshore single-pile foundation is optimal.
Specifically, first flexible pipe, second flexible pipe, third flexible pipe and fourth flexible pipe are the sand bag that sand tube bag or nylon material made. In this embodiment, the first flexible tube, the second flexible tube, the third flexible tube and the fourth flexible tube are sand tube bags. The first filling piece, the second filling piece, the third filling piece and the fourth filling piece are sand.
As shown in fig. 4, an installation method of an anti-erosion structure in an embodiment includes the following steps:
s100: arranging a pressure-bearing section of a pressure-bearing piece and a support column of a single-pile foundation at intervals, arranging a first end of the pressure-bearing section and the support column at intervals according to a first preset interval, arranging a second end of the pressure-bearing section and the support column at intervals according to a second preset interval, and arranging the first end far away from the support column and the second end close to the support column;
s200: the winding section of the pressure loading part is overlapped and wound by taking the support column as a winding center according to a preset number of turns, so that the winding section can cover the first end along the direction from the second end to the first end; therefore, the first end is fixed on the surface of the sea bed through the self weight of the winding section, so that the first end serving as the edge end of the anti-scouring structure for the offshore single-pile foundation is not easy to shift when being scoured by seawater; wherein the winding section can complete winding under the traction of a ship;
s300: and fixing the other end of the winding section on the surface of the sea bed by using a fixing piece. At this time, the other edge end of the anti-scouring structure used as the offshore single pile foundation is not easy to displace when seawater is scoured. Wherein, the fixed part can be a sand bag or a stone block and the like.
When the installation method of the anti-scouring structure is used, the pressure-bearing section of the pressure-bearing piece and the support column of the single-pile foundation are arranged at intervals, so that the subsequent winding section has enough space to complete the winding step; determining the arrangement positions of a first end of a pressure-bearing end and a second end of the pressure-bearing end according to the position of a supporting column of the single-pile foundation; then, the winding section of the pressure-carrying piece is overlapped and wound by taking the supporting column as a winding center according to a preset number of turns, so that the winding section can cover the first end along the direction from the second end to the first end, and thus, the first end is fixed on the surface of the seabed through the self weight of the winding end, and the winding section is used as the edge end of the anti-scouring structure for the offshore single-pile foundation and is not easy to shift when seawater scours; finally, the other end of the winding section is fixed on the sea bed surface through the fixing piece, so that the other edge end of the anti-scouring structure used as the marine single-pile foundation is not easy to shift when being scoured by seawater.
Further, on the basis of the above embodiment, when the installation method of the anti-scour structure is implemented, firstly, the first containing grid, the second containing grid, the third containing grid and the fourth containing grid are sewn on the ship, and the first filling member, the second filling member, the third filling member and the fourth filling member are correspondingly filled in the first flexible pipe, the second flexible pipe, the third flexible pipe and the fourth flexible pipe. At the moment, in the laying process, the connection section is firstly compacted and fixed by utilizing the winding end, then the initial section is compacted and fixed, and finally the other end of the winding end is compacted by adopting a sand bag. In the installation process, a certain distance is kept between the ship and the support column.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only show some 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 (10)
1. An anti-scour structure for an offshore mono-pile foundation, comprising:
the ballast part is arranged on the surface of the sea bed and comprises a pressure-bearing section and a winding section, the pressure-bearing section is arranged at an interval with a support column of a single-pile foundation, the pressure-bearing section comprises a first end and a second end which are opposite, the first end and the support column are arranged at an interval according to a first preset interval, the second end and the support column are arranged at an interval according to a second preset interval, the first end is far away from the support column, the second end is close to the support column, the second end is connected with one end of the winding section, the winding section is overlapped and wound by taking the support column as a winding center according to preset turns, and the winding section can cover the first end along the direction from the second end to the first end; and
and the fixing piece is used for fixing the other end of the winding section on the surface of the sea bed.
2. An erosion protection structure for an offshore mono-pile foundation as claimed in claim 1, wherein said bearing section comprises a start section, said start section being arranged at said first end, said start section being arranged at a distance from said support column, said start section being spaced from said support column by a distance of 10m-15 m.
3. An anti-scour structure for an offshore mono-pile foundation according to claim 2, further comprising at least two first packing members, wherein the starting section is a first flexible pipe provided with at least one first dividing member, the first dividing member divides the first flexible pipe into at least two first containing cells, the first packing members are in one-to-one correspondence with the first containing cells, and the first packing members are disposed in the first containing cells.
4. An erosion protection structure for an offshore mono-pile foundation according to claim 3, characterized in that the volume of the first filler piece is 25-40% of the volume of the first containing lattice.
5. An anti-scouring structure for an offshore single pile foundation according to claim 1, further comprising at least two second filling members, wherein the bearing section further comprises a connecting section, one end of the connecting section is connected with the first end, the other end of the connecting section is the second end, the connecting section is a second flexible pipe, the second flexible pipe is provided with at least one second dividing member, the second dividing member divides the second flexible pipe into at least two second containing cells, the second filling members are in one-to-one correspondence with the second containing cells, and the second filling members are arranged in the second containing cells.
6. An erosion protection structure for an offshore mono-pile foundation according to claim 5, characterized in that the volume of the second filler piece is 50-75% of the volume of the second containing grid.
7. An anti-scouring structure for an offshore single pile foundation according to claim 1, further comprising at least two third filling members, wherein the wound section is a third flexible pipe, the third flexible pipe is provided with at least one third dividing member, the third dividing member divides the third flexible pipe into at least two third containing cells, the third filling members are in one-to-one correspondence with the third containing cells, and the third filling members are arranged in the third containing cells.
8. An erosion protection structure for an offshore mono-pile foundation according to claim 7, wherein the volume of the third filler element is 80-90% of the volume of the third containing lattice.
9. An anti-scouring structure for an offshore single pile foundation according to claim 7, further comprising at least two fourth filling members, wherein the other end of the wound section is a tapered fourth flexible pipe, the diameter of the large end of the fourth flexible pipe is 1.3-2 times that of the small end of the fourth flexible pipe, the fourth flexible pipe is provided with at least one fourth dividing member, the fourth dividing member divides the fourth flexible pipe into at least two fourth containing lattices, the fourth filling members correspond to the fourth containing lattices in a one-to-one manner, the fourth filling members are arranged in the fourth containing lattices, and the volume of the fourth filling members is 40-60% of that of the fourth containing lattices.
10. An installation method of an anti-scouring structure is characterized by comprising the following steps:
arranging a pressure-bearing section of a pressure-bearing piece and a support column of a single-pile foundation at intervals, arranging a first end of the pressure-bearing section and the support column at intervals according to a first preset interval, arranging a second end of the pressure-bearing section and the support column at intervals according to a second preset interval, and keeping the first end away from the support column and keeping the second end close to the support column;
the winding section of the pressure loading part is overlapped and wound by taking the support column as a winding center according to a preset number of turns, so that the winding section can cover the first end along the direction from the second end to the first end;
and fixing the other end of the winding section on the surface of the sea bed by using a fixing piece.
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| CN201810824403.6A CN108978733B (en) | 2018-07-25 | 2018-07-25 | Anti-scouring structure for offshore single-pile foundation and installation method of anti-scouring structure |
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