WO2022253031A1

WO2022253031A1 - Pile stabilization frame for pile driving of offshore wind power inclined pile group and pile driving method

Info

Publication number: WO2022253031A1
Application number: PCT/CN2022/094476
Authority: WO
Inventors: 刘天涛; 许伟群; 黄金海; 梁佳康; 李瑞杰; 周鸿亮; 吕雷雷; 杨建冲; 郑远斌; 彭上志; 吴广东; 徐健
Original assignee: 中交第四航务工程局有限公司
Priority date: 2021-06-02
Filing date: 2022-05-23
Publication date: 2022-12-08
Also published as: CN113356208B; CN113356208A

Abstract

The present invention relates to a pile stabilization frame for the pile driving of an offshore wind power inclined pile group and a pile driving method. The pile stabilization frame comprises: a support frame and a first limiting frame and second limiting frame respectively disposed at two opposite ends of the support frame, the first limiting frame being provided with a rotatable first inclined pile positioning mechanism, and the second limiting frame being provided with a plurality of second inclined pile positioning mechanisms, wherein the projection area of the first limiting frame on a horizontal plane is less than or equal to the projection area of the second limiting frame. According to the pile stabilization frame of the present invention, the fixing and inclination adjustment of a plurality of inclined piles may be achieved without moving the ship position several times to hoist the inclined piles. On one hand, the pile stabilization frame reduces safety risks, and on the other hand, same may reduce processes, improve the pile driving efficiency, and thus save on installation costs. Moreover, by means of providing a rotatable second inclined pile positioning mechanism to cooperate with the plurality of first inclined pile positioning mechanisms, the overall weight of the device may be reduced, production and installation difficulties may be lessened, and costs may be reduced.

Description

A pile stabilization frame and pile sinking method for offshore wind power inclined pile group pile sinking

technical field

The invention relates to the technical field of offshore piling construction, in particular to a pile stabilization frame and a pile driving method for pile driving of inclined pile groups of offshore wind power.

Background technique

In the 21st century, offshore wind power has become an important strategic energy source. More and more countries have begun to vigorously build wind farms. A large part of the wind farms are located in the intertidal zone. Intertidal zone construction is an important research for offshore wind power project construction. one of the objects. Pile foundation construction is one of the key contents of offshore wind power projects, and its water depth and geological conditions directly affect the selection of pile driving technology. At the same time, inclined pile groups with high bearing capacity and good stability are mostly used in the pile foundation construction of offshore wind power pile groups.

Wind power projects in the intertidal zone are generally located in nearshore shoal areas where there is no shelter for construction, strong winds and waves, harsh sea conditions for operation, and severe monsoon climate impacts. Due to the shallow water depth, the commonly used piling barge cannot meet the draft requirements, resulting in difficulties in pile sinking construction; at the same time, the single pile sinking device is used in sequence, the construction efficiency is low, the safety hazard is large, and the average cost is high.

Contents of the invention

In view of this, it is necessary to address the above problems and provide a pile stabilization frame for pile driving of inclined pile groups in offshore wind power, which can improve pile driving accuracy while improving pile driving efficiency.

The present invention also proposes a pile driving method, which is used for the above-mentioned pile stabilizer.

In order to achieve the above object, the present invention proposes a pile stabilizing frame used for pile sinking of offshore wind power inclined pile groups, which adopts the following technical scheme: the pile stabilizing frame includes a support frame and first limiters respectively arranged at opposite ends of the support frame frame and the second limit frame, the first limit frame is provided with a rotatable first inclined pile positioning mechanism, and the second limit frame is provided with a plurality of second inclined pile positioning mechanisms, wherein, on the horizontal plane, the first The projected area of the first limiting frame is smaller than or equal to the projected area of the second limiting frame.

Its working principle is: the second limit frame is equipped with a plurality of second inclined pile positioning mechanisms to fix a plurality of inclined piles, and the upper end of one of the inclined piles is adjusted and fixed by the first inclined pile positioning mechanism. The cooperation of the second inclined pile positioning mechanism and the first inclined pile positioning mechanism realizes the adjustment and fixation of the slope of the inclined pile. After the inclined pile is in place, the first inclined pile positioning mechanism is rotated to the next inclined pile. The upper end of the inclined pile is adjusted and fixed in the direction of inclination until all the inclined piles are sunk in place.

The beneficial effects of the present invention are: the inclined piles usually have the characteristics of large diameter, long length, heavy weight, etc., through the cooperation of the second inclined pile positioning mechanism and multiple first inclined pile positioning mechanisms, the fixing of multiple inclined piles can be realized As well as the adjustment of the inclination, there is no need to move the ship's position multiple times to lift the inclined piles. On the one hand, it reduces the safety risk, on the other hand, it can save procedures, improve the efficiency of pile sinking, and save installation costs. By setting the rotatable second inclined pile positioning mechanism and cooperating with multiple first inclined pile positioning mechanisms, the overall weight of the equipment can be reduced, the difficulty of production and installation can be reduced, and the cost can be saved; in the horizontal plane, the projected area of the first limit frame The projected area less than or equal to the second limit frame can make the pile stabilizer more stable during work and improve the stability of the pile stabilizer.

Optionally, the first inclined pile positioning mechanism includes a telescopic load-bearing frame, and a first mobile frame is provided on opposite sides of the load-bearing frame, and the load-bearing frame and the first mobile frames on both sides jointly define a first positioning opening, and the load-bearing frame stretching in a direction approaching or away from the first positioning opening. The load-bearing frame can play a good role in supporting the inclined pile during pile sinking. By setting the load-bearing frame, it can expand and contract along the direction close to or away from the first positioning opening, so that the load-bearing frame can better respond to different design inclinations of the inclined pile. Make adjustments. When adjusting the inclination of the inclined pile, extend the load-bearing frame towards the first positioning port or the direction close to the inclined pile. When the inclined pile is sinking, the inclined pile is supported and fixed. When the inclined pile is sinking in place , the load-bearing frame can be retracted toward the direction away from the first positioning opening or away from the inclined pile, so that the first positioning opening can easily escape from the inclined pile, and it is convenient to remove the stabilizing frame from the inclined pile.

Optionally, the angle between the expansion and contraction direction of the load-bearing frame and the horizontal plane is equal to the angle between the inclined pile and the vertical direction. Obviously, in the vertical direction, the inclined pile is inclined, so that the load-bearing frame can be inclined. The axial support force of the pile is equal to the force in the normal direction of the contact surface between the inclined pile and the load-bearing frame, so that the equipment that drives the load-bearing frame to expand and contract can be reduced in size, saving costs, and at the same time reducing the need for the pile stabilization frame to approach the first limit frame The weight of the direction improves the stability of the pile stabilizer when it is working.

Optionally, the first moving frame can move along the radial direction of the first positioning opening, and the end of the first moving frame close to the first positioning opening is provided with a first sliding wheel, and the first moving frame moves along the radial direction of the first positioning opening. Approaching and contacting the inclined pile in the direction can better adjust the inclination of the inclined pile and assist in the positioning of the inclined pile from a direction different from the support direction of the load-bearing frame to the inclined pile. The first moving frame moves away from the inclined pile along the radial direction of the first positioning opening When the pile is used, the first inclined pile positioning frame can be more conveniently disengaged from the inclined pile. Since the surface of the first sliding wheel is a curved surface and can rotate, the friction force when the first sliding wheel contacts the inclined pile can be reduced, and the possibility of the paint on the surface of the inclined pile being scratched and peeled off can be reduced.

It should be noted that there may be one or more first sliding wheels, for example two, which may be set as required.

Optionally, slidable sliding parts are also provided on opposite sides of the load-bearing frame, the first mobile frame is mounted on the sliding part, and the sliding direction of the sliding part is at a certain angle to the direction in which the first mobile frame moves, thus enabling When a slanted pile positioning mechanism needs to fix the slanted pile and adjust the inclination, the sliding part slides and drives the first mobile frame to move and extend toward the direction close to the slanted pile. After the sliding part slides in place, the first mobile frame moves along the first positioning The radial direction of the opening moves close to the inclined pile. When the first inclined pile positioning mechanism finishes working, the first moving frame moves away from the inclined pile along the radial direction of the first positioning opening. After the sliding part carries the first moving frame away from the inclined pile The direction of the inclined pile is moved and retracted, so that the first inclined pile positioning mechanism is easier to escape from the inclined pile, and at the same time, the size of the first limit frame is smaller when it is not working, so that the stable pile frame is easier to move, assemble and transport. Preferably, the sliding direction of the sliding part is perpendicular to the moving direction of the first moving frame, which can better shorten the sliding stroke when the sliding part moves from the non-working position to the working position.

Optionally, the bottom of the sliding part is provided with a plurality of rollers, and the rollers are arranged between the bottom of the sliding part and the surface of the side of the first limiting frame away from the second limiting frame, which can reduce the difference between the sliding part and the first limiting frame when sliding. The friction between the frames makes the sliding part easier to slide.

Optionally, the first inclined pile positioning mechanism also includes a fixed part, the sliding part is arranged on the fixed part, the sliding part can slide relative to the fixed part, a plurality of rollers are arranged on the fixed part, and the bottom of the sliding part and the outer surface of the rollers touch.

Optionally, the first slanted pile positioning mechanism also includes a universal wheel assembly, and the bottom of the universal wheel assembly is in contact with the surface of the first limit frame away from the second limit frame, which can reduce the weight of the first slanted pile positioning mechanism. The friction force between the rotation and the first limit frame.

Optionally, the second inclined pile positioning mechanism includes a second positioning opening, and a plurality of second moving frames are arranged along the circumference of the second positioning opening, and the second moving frames can move along the radial direction of the second positioning opening, which can better The inclined pile is positioned and fixed, and the stability of the second inclined pile positioning mechanism is improved when the inclined pile is positioned and fixed. When the second mobile frame is away from the inclined pile along the radial direction of the second positioning opening, the second inclined pile can be positioned The frame is more convenient to get out of the inclined pile. In addition, after the pile sinking of the inclined pile is completed, the inclination of the inclined pile can be fine-tuned by adjusting the position of the second mobile frame, so as to ensure the accuracy of the inclination of the inclined pile.

Optionally, a second sliding wheel is provided at one end of the second mobile frame near the peripheral wall of the second positioning opening. Since the surface of the second sliding wheel is a curved surface and can rotate, the time when the second sliding wheel contacts the inclined pile can be reduced. The friction force reduces the possibility of the paint on the surface of the inclined pile being scratched and peeled off.

It should be noted that there may be one or more second sliding wheels, for example two, which may be set as required.

Optionally, the central axes of the plurality of second inclined pile positioning mechanisms have the same distance from the central axis of the support frame, and the first inclined pile positioning mechanism rotates around the central axis of the support frame, thereby enabling the structure of the pile stabilizer to be symmetrical The regular setting makes the center of gravity of the pile stabilizer more stable when it is working, and improves the stability of the pile stabilizer when it is working.

A pile driving method according to an embodiment of the present invention, which is used for the above-mentioned pile stabilization frame, includes: driving a plurality of anchor piles into the sea, installing the pile stabilization frame on the plurality of anchor piles, thereby fixing the pile stabilization frame On the sea surface; install multiple inclined piles on the pile stabilization frame, fix the inclined piles on the second inclined pile positioning mechanism of the second limit frame; adjust and position one of the inclined piles through the first inclined pile positioning mechanism ;Use a vibrating hammer to initially drive the inclined pile, and then use an impact hammer to hit the inclined pile until the upper end of the inclined pile reaches the first distance from the first limit frame; the first inclined pile positioning mechanism is directed away from the direction of the inclined pile Move the inclined pile out of the first inclined pile positioning mechanism; use the impact hammer to finally hit the inclined pile and sink the pile in place; turn the first inclined pile positioning mechanism to the next inclined pile to adjust and position it, and the inclined pile The piles are driven into place, and the above actions are repeated until all the inclined piles are installed in place. The initial driving of the inclined piles is carried out with a vibrating hammer, and then the impact hammer is used to hit the inclined piles until the upper end of the inclined piles is separated from the first limit frame. The first distance can increase the penetration depth and stability of the inclined pile. Move the first inclined pile positioning mechanism toward the direction away from the inclined pile, so that the inclined pile breaks away from the first inclined pile positioning mechanism; at this time, the hammer body is not blocked, and the impact hammer is used to beat the inclined pile until the design elevation. This can reduce the number of times to move the ship's position for pile lifting, and reduce safety risks. On the other hand, it can save procedures, improve pile sinking efficiency, and save installation costs. And through the cooperation of the second inclined pile positioning mechanism and the plurality of first inclined pile positioning mechanisms, the installation efficiency of the inclined pile can be greatly improved, and the installation and construction cost of the inclined pile can be reduced.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and comprehensible from the description of the embodiments in conjunction with the following drawings, wherein:

Fig. 1 is the top view of the partial structure of the pile stabilizer according to the embodiment of the present invention;

Fig. 2 is a cross-sectional view of an angle of the pile stabilizer according to an embodiment of the present invention;

Fig. 3 is a sectional view of another angle of the pile stabilizer according to an embodiment of the present invention;

Fig. 4 is the enlarged view of place A in Fig. 3;

Fig. 5 is a top view of a first spacer according to an embodiment of the present invention;

Fig. 6 is the enlarged view of place B in Fig. 5;

Fig. 7 is a top view of a first inclined pile positioning mechanism according to an embodiment of the present invention;

Fig. 8 is a top view of a partial structure of a second spacer according to an embodiment of the present invention.

Reference signs:

Pile stabilizer 1, inclined pile 2, anchor pile 3,

Support frame 10, first limit frame 20, first inclined pile positioning mechanism 21, bearing frame 211, pulley 2112, first moving frame 212, first sliding wheel 213, sliding part 214, roller 215, universal wheel assembly 216 , fixed part 217,

The first positioning opening a, the second positioning opening b, the anchor pile installation position c,

The second limiting frame 30 , the second inclined pile positioning mechanism 31 , the second moving frame 311 , and the second sliding wheel 312 .

Detailed ways

In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be further clearly and completely described below in conjunction with the embodiments of the present invention. It should be noted that the described embodiments are only some of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

A pile stabilizer 1 according to an embodiment of the present invention will be described below with reference to accompanying drawings 1-8.

As shown in Figures 1 to 4, a pile stabilization frame 1 for pile sinking of offshore wind power inclined pile groups according to an embodiment of the present invention includes a support frame 10 and first stoppers respectively arranged at opposite ends of the support frame 10 Frame 20 and the second limiting frame 30.

Specifically, the first limiting frame 20 is provided with a rotatable first inclined pile positioning mechanism 21, and the second limiting frame 30 is provided with a plurality of second inclined pile positioning mechanisms 31, wherein, on the horizontal plane, the first The projected area of the limiting frame 20 is smaller than or equal to the projected area of the second limiting frame 30 . Its working principle is: the second limiting frame 30 is provided with a plurality of second inclined pile positioning mechanisms 31 to fix a plurality of inclined piles 2, and the upper end of one of the inclined piles 2 is tilted by the first inclined pile positioning mechanism 21. Direction adjustment and fixation, through the cooperation of the second inclined pile positioning mechanism 31 and the first inclined pile positioning mechanism 21, the inclination adjustment and fixing of the inclined pile 2 are realized. After the inclined pile 2 is piled in place, the first inclined pile is rotated The positioning mechanism 21 goes to the next inclined pile 2, adjusts the direction of inclination and fixes the upper end of the inclined pile 2 until all the inclined piles 2 sink into place.

It should be noted that the first limit frame 20 and the second limit frame 30 are detachably connected to the support frame 10 , thereby facilitating disassembly, transportation and movement.

It should also be noted that the number of the second inclined pile positioning mechanisms 31 can be set as required, for example, 4, 5, 6, 7, and 8.

In some embodiments, the first limit frame 20 and the second limit frame 30 are composed of I-beams, and the support frame 10 is composed of trusses of different sizes, thereby reducing the overall weight of the pile stabilizer 1 and simultaneously The structural strength of the pile stabilizer 1 is ensured, thereby reducing the specifications of the hoisting equipment for hoisting the pile stabilizer 1 .

The inclined pile 2 usually has the characteristics of large diameter, long length, and heavy weight, and belongs to the hoisting construction of long components. According to the pile stabilization frame 1 of the embodiment of the present invention, the second inclined pile positioning mechanism 31 and a plurality of first inclined piles are used for positioning. The cooperation of the mechanism 21 can realize the fixing and inclination adjustment of multiple inclined piles 2, without moving the position of the ship multiple times to hang the inclined piles 2, on the one hand, the safety risk is reduced, on the other hand, the process can be saved, and the pile sinking can be improved. efficiency, thereby saving installation costs. And by arranging the rotatable second inclined pile positioning mechanism 31, cooperating with a plurality of first inclined pile positioning mechanisms 21, the overall weight of the equipment can be reduced, the difficulty of production and installation can be reduced, and the cost can be saved; in the horizontal plane, the first limit frame 20 The projected area is less than or equal to the projected area of the second limiting frame 30, which can make the pile stabilizing frame 1 more stable during work and improve the stability of the pile stabilizing frame 1. In some embodiments, the first limit frame 20 and the second limit frame 30 are composed of I-beams, the support frame 10 is composed of steel pipe trusses, the first limit frame 20 is at the upper end of the support frame 10, and the second limit frame The frame 30 is at the lower end of the support frame 10, and the construction of multiple inclined piles 2 can be completed by cooperating with the "slab barge and crawler crane" during pile sinking. After the actual effect verification, six inclined piles 2 with a diameter of 1.4m can be completed in three days , The length is 71m, and the pile sinking work of the "plum blossom pile" with a slope ratio of 6:1 greatly improves the work efficiency, and is simple to operate, low in safety risks, high in overall construction quality, and effectively reduces the cost.

As shown in FIGS. 3-6 , optionally, the first inclined pile positioning mechanism 21 includes a telescopic load-bearing frame 211, and the opposite sides of the load-bearing frame 211 are provided with a first mobile frame 212, and the load-bearing frame 211 and the two sides on both sides The first moving frame 212 jointly defines a first positioning opening a, and the bearing frame 211 expands and contracts in a direction approaching or away from the first positioning opening a. The load-bearing frame 211 can play a good supporting role for the inclined pile 2 during pile sinking. By setting the load-bearing frame 211, it can expand and contract along the direction close to or away from the first positioning opening a, so that the load-bearing frame 211 can better support the inclined pile. 2 to adjust the inclination of different designs. When adjusting the inclination of the inclined pile 2, the bearing frame 211 is extended toward the direction close to the first positioning opening a or close to the inclined pile 2. When the inclined pile 2 is sinking, the inclined pile 2. Supporting and fixing, when the inclined pile 2 is sinking in place, the load-bearing frame 211 can be retracted toward the direction away from the first positioning opening a or away from the inclined pile 2, so that the first positioning opening a can easily escape from the inclined pile 2, It is convenient to dismantle the pile stabilizing frame 1 from the inclined pile 2.

Optionally, the angle between the expansion and contraction direction of the load-bearing frame 211 and the horizontal plane is equal to the angle between the inclined pile 2 and the vertical direction. Obviously, in the vertical direction, the inclined pile 2 is inclined, so that the setting can make the load bearing The axial support force of the frame 211 on the inclined pile 2 is equal to the force in the normal direction of the contact surface between the inclined pile 2 and the load-bearing frame 211, so that the equipment for driving the load-bearing frame 211 to expand and contract can be reduced in size, saving costs, and at the same time can reduce the stability. The weight of the pile frame 1 close to the direction of the first limit frame 20 improves the stability of the pile stabilizer frame 1 during work.

As shown in Figures 5 and 6, optionally, the end of the bearing frame 211 near the first positioning opening a is provided with a pulley 2112, and when the bearing frame 211 supports and positions the inclined pile 2, the pulley 2112 is in contact with the inclined pile 2, It can reduce the frictional force when the load-bearing frame 211 is in contact with the inclined pile 2, and reduce the possibility that the paint on the surface of the inclined pile 2 is scratched and peeled off.

It should be noted that there may be one or more pulleys 2112, such as two, which may be set as required.

As shown in Figure 3 and Figure 4, two pulleys 2112 are arranged side by side, which can better reduce the friction force when the load-bearing frame 211 is in contact with the inclined pile 2, and reduce the possibility of the paint on the surface of the inclined pile 2 being scratched and peeled off .

As shown in Figures 3-6, optionally, the first moving frame 212 can move along the radial direction of the first positioning opening a, and the end of the first moving frame 212 close to the first positioning opening a is provided with a first slide The wheel 213, the first mobile frame 212 approaching and contacting the inclined pile 2 along the radial direction of the first positioning opening a can better incline the inclined pile 2 from a direction different from that of the supporting frame 211 to the inclined pile 2 For adjustment and auxiliary positioning, when the first moving frame 212 moves away from the inclined pile 2 along the radial direction of the first positioning opening a, the positioning frame of the first inclined pile 2 can be more easily disengaged from the inclined pile 2 . Since the surface of the first sliding wheel 213 is a curved surface and can rotate, the friction force when the first sliding wheel 213 contacts with the slanting pile 2 can be reduced, and the possibility of the paint on the surface of the slanting pile 2 being scratched and peeled off can be reduced.

As shown in Figures 3-6, optionally, slidable sliding parts 214 are also provided on opposite sides of the bearing frame 211, the first moving frame 212 is arranged on the sliding part 214, and the sliding direction of the sliding part 214 is the same as that of the first sliding part. The moving direction of the moving frame 212 is at a certain angle, so that when the first inclined pile positioning mechanism 21 needs to fix the inclined pile 2 and adjust the inclination, the sliding part 214 slides and drives the first moving frame 212 toward the inclined pile 2. After the sliding part 214 slides in place, the first moving frame 212 moves close to the inclined pile 2 along the radial direction of the first positioning opening a. When the first inclined pile positioning mechanism 21 finishes working, the first moving After the frame 212 moves away from the inclined pile 2 in the radial direction of the first positioning opening a and is in place, the sliding part 214 carries the first moving frame 212 to move and retract in a direction away from the inclined pile 2, so that the first inclined pile positioning mechanism 21 is easier to come out The inclined pile 2 makes the size of the first spacer 20 smaller when it is not working, so that the stable pile frame 1 is more convenient to move, assemble and transport.

Preferably, the sliding direction of the sliding part 214 is perpendicular to the moving direction of the first moving frame 212 , which can simplify the structural arrangement and shorten the stroke of the sliding part 214 from the rest position to the working position.

As shown in FIGS. 5-7 , optionally, the bottom of the sliding part 214 is provided with a plurality of rollers 215, and the rollers 215 are arranged on the bottom of the sliding part 214 and the side surface of the first limiting frame 20 away from the second limiting frame 30. Between, the frictional force between the sliding part 214 and the first limiting frame 20 can be reduced when the sliding part 214 slides, so that the sliding part 214 can slide more easily.

As shown in Figure 7, optionally, the first inclined pile positioning mechanism 21 also includes a fixed part 217, the sliding part 214 is arranged on the fixed part 217, the sliding part 214 is slidable with respect to the fixed part 217, the sliding part 214 and the fixed part A plurality of rollers 215 are arranged between 217, the top of the sliding part 214 and the bottom of the sliding part 214 are in contact with the outer surface of the rollers 215, and the sliding part 214 is fixed on the first limit frame 20 by the fixing part 217, so that the sliding part 214 can be lifted. Section 214 stability.

As shown in FIGS. 5-7 , optionally, the first inclined pile positioning mechanism 21 further includes a universal wheel assembly 216, and the bottom of the universal wheel assembly 216 and the first limit frame 20 are away from the second limit frame 30. The surface contact on one side can reduce the friction force between the first inclined pile positioning mechanism 21 and the first limiting frame 20 when it rotates.

As shown in Figure 1 and Figure 8, optionally, the second inclined pile positioning mechanism 31 includes a second positioning opening b, and a plurality of second moving frames 311 are arranged along the circumference of the second positioning opening b, and the second moving frames 311 can Moving along the radial direction of the second positioning opening b can better position and fix the inclined pile 2, and improve the stability of the second inclined pile positioning mechanism 31 when positioning and fixing the inclined pile 2. The second moving frame 311 moves along the first When the radial direction of the second positioning opening b is far away from the inclined pile 2, the positioning frame of the second inclined pile 2 can be more conveniently detached from the inclined pile 2. In addition, after the pile sinking of the inclined pile 2 is completed, the inclination of the inclined pile 2 can be fine-tuned by adjusting the position of the second mobile frame 311 to ensure the accuracy of the inclination of the inclined pile 2 .

Preferably, a plurality of second moving frames 311 are evenly arranged along the circumferential direction of the second positioning opening b, thereby enabling the second moving frames 311 to be more uniformly stressed when in contact with the inclined pile 2 and improving the stability of the inclined pile 2 .

As shown in Figure 8, optionally, a second sliding wheel 312 is provided on the second moving frame 311 near the peripheral wall of the second positioning opening b. Since the surface of the second sliding wheel 312 is a curved surface and can rotate, it can reduce the The friction force when the small second sliding wheel 312 is in contact with the inclined pile 2 reduces the possibility that the paint on the surface of the inclined pile 2 is scraped off.

It should be noted that there may be one or more second sliding wheels 312, such as two, which may be set as required.

Optionally, the central axes of a plurality of second inclined pile positioning mechanisms 31 have the same distance from the central axis of the support frame 10, and the first inclined pile positioning mechanism 21 rotates around the central axis of the support frame 10, thereby making the pile stabilization frame The structure of 1 can be arranged symmetrically and regularly, so that the center of gravity of the pile stabilizer 1 is more stable during work, and the stability of the pile stabilizer 1 during work is improved.

As shown in Fig. 1 and Fig. 8, optionally, a plurality of anchor pile installation positions c are also provided on the second limit frame 30, and when the pile stabilization frame 1 is working at sea, the anchor pile 3 is installed to the anchor pile installation position c. Position c, the pile stabilizer 1 is fixed on the sea.

A pile driving method according to an embodiment of the present invention is used for the above-mentioned pile stabilizing frame 1, comprising: S01 driving a plurality of anchor piles 3 into the sea, and installing the pile stabilizing frame 1 on a plurality of anchor piles 3, thereby The stable pile frame 1 is fixed on the sea surface; S02 installs a plurality of inclined piles 2 on the stable pile frame 1, and the inclined piles 2 are fixed on the second inclined pile positioning mechanism 31 of the second limit frame 30; S03 passes the first A slanted pile positioning mechanism 21 adjusts and positions one of the slanted piles 2; S04 initially drives the slanted pile 2 with a vibratory hammer, and then uses an impact hammer to strike the slanted pile 2 until the upper end of the slanted pile 2 is separated from the first limit frame When 20 reaches the first distance; S05 moves the first inclined pile positioning mechanism 21 towards the direction away from the inclined pile 2, so that the inclined pile 2 escapes from the first inclined pile positioning mechanism 21; S06 uses the impact hammer to finally hit the inclined pile 2 Sink the pile in place; S07 rotate the first inclined pile positioning mechanism 21 to adjust and position the next inclined pile 2, and drive the inclined pile 2 into place, repeat the above action until all the inclined piles 2 are installed In place, use the vibratory hammer to initially drive the inclined pile 2, and then use the impact hammer to hit the inclined pile 2 until the upper end of the inclined pile 2 is at the first distance from the first limit frame 20 to the first distance, which can increase the depth and stability of the inclined pile 2 . Move the first inclined pile positioning mechanism 21 away from the inclined pile 2, so that the inclined pile 2 escapes from the first inclined pile positioning mechanism 21; at this time, the hammer body is not blocked, and the impact hammer is used to beat the inclined pile 2 until the design elevation . This can reduce the number of times to move the ship's position for pile lifting, reducing safety risks. On the other hand, it can save procedures, improve pile sinking efficiency, and save installation costs. And through the cooperation of the second inclined pile positioning mechanism 31 and the plurality of first inclined pile positioning mechanisms 21, the installation efficiency of the inclined pile 2 can be greatly improved, and the installation and construction cost of the inclined pile 2 can be reduced.

In some embodiments, the flat barge is anchored and positioned to sit on the bottom according to the coordinates in advance, the crawler crane on the flat barge is prepared for vehicle preparation, the vibratory hammer power station is prepared for vehicle preparation, and the inclined pile 2 is anchored and positioned according to the coordinates; Before installation, the pile sinking of multiple positioning anchor piles 3 is completed and the pile heads are cut level to the design elevation; a limit device is welded on the top of the anchor piles 3 so that the pile stabilization frame 1 can be installed on the anchor piles 3 quickly and accurately. The crawler crane lifts the inclined pile 2 to the stable pile frame 1, and completes the adjustment and positioning of the inclination of the inclined pile 2 through the cooperation of the first inclined pile positioning mechanism 21 and the second inclined pile positioning mechanism 31; Initial driving until the inclined pile 2 has no obvious sinking; after the initial driving of the vibratory hammer, use the impact hammer to sink the pile; when the upper end of the inclined pile 2 is at the first distance from the first limit frame 20, the first inclined pile positioning mechanism 21 disengage from the inclined pile 2, and then rotate a certain angle, such as 180°, so that the first inclined pile positioning mechanism 21 makes way for the impact hammer, so that the impact hammer is not blocked, and then beat the inclined pile 2 to the design elevation; repeat until the inclined pile 2 sink all the piles, pull out the pile stabilizer 1, and move the ship to the next machine position.

Table 1

Table 1 is a comparative analysis table of the pile sinking costs of different processes. It can be seen from Table 1 that in some embodiments, the pile sinking of 6 steel column piles has obvious cost advantages compared with the traditional pile sinking process, at least Can save 50% of the cost.

In some embodiments, the number of the second inclined pile positioning mechanisms 31 is 6, and when the pile stabilization frame 1 is used to sink a plurality of inclined piles 2, the ship can complete the pile sinking of six inclined piles 2 in one positioning. And the pile sinking accuracy meets the design requirements, and the time for the inclined pile 2 from lifting the vertical pile by double cranes to the final pile sinking to the design elevation is shortened, shortening the construction period and greatly improving the construction efficiency.

The above examples only express several implementations of the present invention, and the description thereof is relatively specific and detailed, but should not be construed as limiting the patent scope of the present invention. It should be pointed out that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims.

Claims

A pile stabilization frame for pile sinking of inclined pile groups in offshore wind power, characterized in that it includes: a support frame and a first limit frame and a second limit frame respectively arranged at opposite ends of the support frame, the The first limit frame is provided with a rotatable first inclined pile positioning mechanism, and the second limit frame is provided with a plurality of second inclined pile positioning mechanisms, wherein,

On a horizontal plane, the projected area of the first limiting frame is smaller than or equal to the projected area of the second limiting frame.
According to claim 1, the pile stabilizing frame for pile sinking of offshore wind power inclined pile groups is characterized in that, the first inclined pile positioning mechanism includes a telescopic load-bearing frame, and the opposite sides of the load-bearing frame are provided with The first moving frame, the supporting frame and the first moving frames on both sides jointly define a first positioning opening, and the supporting frame expands and contracts in a direction approaching or away from the first positioning opening.
According to claim 2, the pile stabilizing frame used for pile sinking of the inclined pile group of offshore wind power is characterized in that, the included angle between the expansion and contraction direction of the load-bearing frame and the horizontal plane is equal to the included angle between the inclined pile and the vertical direction.
According to claim 2, the pile stabilizing frame for pile sinking of inclined pile groups in offshore wind power, characterized in that, the first moving frame can move along the radial direction of the first positioning opening, and the first moving A first sliding wheel is provided at one end of the frame close to the first positioning opening.
According to claim 2, the pile stabilizing frame used for pile sinking of inclined pile groups in offshore wind power, is characterized in that slidable sliding parts are also provided on the opposite sides of the load-bearing frame, and the first mobile frame is erected on the On the sliding part, the sliding direction of the sliding part forms a certain angle with the moving direction of the first moving frame.
The pile stabilizing frame for sinking piles of inclined pile groups in offshore wind power according to claim 6, wherein a plurality of rollers are arranged at the bottom of the sliding part.
According to claim 2, the pile stabilizing frame for pile sinking of offshore wind power inclined pile groups is characterized in that, the first inclined pile positioning mechanism also includes: a universal wheel assembly, the bottom of which is in contact with the universal wheel assembly A side surface of the first limiting frame away from the second limiting frame is in contact with the surface.
According to claim 1, the pile stabilizing frame for offshore wind power inclined pile group pile sinking is characterized in that, the second inclined pile positioning mechanism includes a second positioning opening, and there are multiple positioning holes along the circumference of the second positioning opening. a second moving frame, and the second moving frame can move along the radial direction of the second positioning opening.
According to claim 9, the pile stabilizing frame used for sinking piles of inclined pile groups in offshore wind power plants is characterized in that a second sliding wheel is provided on the end of the second moving frame close to the peripheral wall of the second positioning opening.
According to any one of claims 1-10, the pile stabilizing frame for pile sinking of inclined pile groups for offshore wind power, is characterized in that,

The central axes of the plurality of second inclined pile positioning mechanisms are at the same distance from the central axis of the support frame, and the first inclined pile positioning mechanism rotates around the central axis of the support frame.
A pile driving method, used for the pile stabilization frame described in any one of claims 1-10, characterized in that, comprising:

Driving a plurality of anchor piles into the sea, and installing the pile stabilization frame on the plurality of anchor piles;

A plurality of inclined piles are installed on the stable pile frame, and the inclined piles are fixed on the second inclined pile positioning mechanism of the second spacer;

One of the inclined piles is adjusted and positioned by the first inclined pile positioning mechanism;

Initial driving of the inclined pile with a vibratory hammer, and then hitting the inclined pile with an impact hammer until the upper end of the inclined pile is at a first distance from the first limit frame;

moving the first slanted pile positioning mechanism toward a direction away from the slanted pile, so that the slanted pile escapes from the first slanted pile positioning mechanism;

Use the impact hammer to carry out the final impact on the inclined pile and sink the pile in place;

Rotate the first slanted pile positioning mechanism to adjust and position the next slanted pile, and drive the slanted pile into place, and repeat the above actions until all the slanted piles are installed in place.