Positioning device for offshore wind power four-pile jacket foundation

Abstract

The utility model discloses a positioning device for an offshore wind power four-pile jacket foundation. The positioning device comprises an upper positioning frame, a lower positioning frame and four winches. The plane of the upper positioning frame is rectangular, and the upper positioning frame is fixed on a deck of a transportation barge or a platform ship with the width smaller than that of the upper positioning frame; the upper positioning frame comprises four upper positioning sleeves and four upper fixing brackets; the connecting line of the axes of the four upper positioning sleeves is rectangular; the four upper fixing brackets are connected among the four upper positioning sleeves in a one-to-one correspondence manner; the plane of the lower positioning frame is rectangular, the plane size of the lower positioning frame is the same as that of the upper positioning frame, and the lower positioning frame comprises four lower positioning sleeves and four lower fixing supports, wherein the connecting line of the axes of the four lower positioning sleeves is rectangular, and the four lower fixing supports are connected among the four lower positioning sleeves in a one-to-one correspondence mode; the four winches and the four upper positioning sleeves are installed on a deck of the transportation barge or the platform ship in a one-to-one correspondence mode, and steel slings wound on the four winches are connected with the four corners in a one-to-one correspondence mode. The device is light in overall weight, convenient to position and capable of adapting to jacket construction at different water depths.

Description

Technical Field

[0001] The utility model relates to a positioning device for an offshore wind power four-pile conductor frame foundation. Background Art

[0002] At present, most offshore wind power projects have been developed or are underway. Wind power in water depths of 30 to 40 meters is mainly based on single pile foundations, while wind power in water depths of 40 to 60 meters is mainly based on jacket foundations. With the increase in the proportion of offshore installed capacity, domestic wind power is gradually developing towards deep sea, and jacket foundations will increasingly develop towards deep water areas. At present, there are two methods for jacket foundation construction, namely the pile-first method and the pile-later method.

[0003] At present, the construction process of the jacket pile-first method is: erection of the jacket positioning platform → vibration installation of auxiliary piles → leveling of the jacket positioning platform → hoisting of engineering piles → hammering of engineering piles → lowering of the pile driver → hammering of engineering piles to the designed elevation → hoisting of the pile driver → removal of auxiliary piles → hoisting and shifting of the jacket positioning platform → construction at the next machine position.

[0004] In the jacket pile-first method, the jacket positioning platform itself has many construction processes, and the jacket positioning platform is high, the overall weight is heavy, and positioning is difficult. Utility Model Content

[0005] The utility model aims to overcome the defects of the prior art and provide a positioning device for an offshore wind power four-pile jacket foundation, which has a light overall weight, is not only convenient for positioning, but also can adapt to the jacket construction in different water depths.

[0006] The purpose of the utility model is achieved as follows: a positioning device for an offshore wind power four-pile jacket foundation, based on a transport barge or a platform ship and comprising an upper positioning frame, a lower positioning frame and four winches; wherein,

[0007] The upper positioning frame has a rectangular plane and is fixed on the deck of a transport barge or a platform ship whose width is smaller than that of the upper positioning frame. The upper positioning frame includes four upper positioning sleeves whose axis connecting lines are rectangular and four upper fixing brackets connected between the four upper positioning sleeves in a one-to-one correspondence.

[0008] The plane of the lower positioning frame is rectangular and has the same plane size as the upper positioning frame. The lower positioning frame includes four lower positioning sleeves whose axis connecting lines are rectangular and four lower fixing brackets connected between the four lower positioning sleeves in a one-to-one correspondence;

[0009] Four winches are installed on the deck of the transport barge or platform ship in a one-to-one correspondence with the four upper positioning sleeves on the upper positioning frame, and the steel slings wound on the four winches are connected to the four corners of the lower positioning frame in a one-to-one correspondence.

[0010] In the above-mentioned positioning device for the offshore wind power four-pile jacket foundation, the upper fixed bracket and the lower fixed bracket both adopt a spatial truss structure.

[0011] The above-mentioned positioning device for the offshore wind power four-pile jacket foundation, wherein an inverted cone-shaped guide cup is coaxially fixed to the upper end of the lower positioning sleeve;

[0012] In the above-mentioned positioning device for the offshore wind power four-pile jacket foundation, an annular anti-sinking plate is coaxially fixed to the lower end of each lower positioning sleeve.

[0013] The characteristics of the positioning device of the offshore wind power four-pile jacket foundation of the utility model are:

[0014] 1) The positioning device of the utility model is provided with an upper positioning frame and a lower positioning frame on the upper and lower layers of the transport barge deck respectively. The upper positioning frame and the lower positioning frame are connected by four steel slings. The length of the steel slings can be adjusted according to the water depth so that the lower positioning frame can be seated at the bottom, which can adapt to the positioning problem of underwater engineering piles of jackets in different water depths.

[0015] 2) The positioning device of the utility model changes the original integral bottom platform with auxiliary piles into a split upper positioning frame and a lower positioning frame. The horizontality of the lower positioning frame can be adjusted by four winches on the upper positioning frame in combination with steel slings. It can not only adapt to the positioning construction of the first pile method of the jacket at different water depths, but also reduce the overall weight and is easy to carry and move. It can effectively solve the problem of the heavy and bulky platform of the deep-sea jacket pile sinking operation platform, and at the same time reduce the investment in auxiliary piles and vibrating hammers, thereby reducing costs and increasing efficiency, and solving the problem of relative position accuracy of the jacket pile sinking operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a perspective view of the positioning device of the offshore wind power four-pile jacket foundation of the utility model;

[0017] Figure 2 This is a working state diagram of the positioning device of the utility model;

[0018] Figure 3 This is another working state diagram of the positioning device of the utility model. DETAILED DESCRIPTION

[0019] The utility model will be further described below in conjunction with the accompanying drawings.

[0020] See also Figure 1 The positioning device of the offshore wind power four-pile conductor frame foundation of the utility model is based on a transport barge or a platform ship and includes an upper positioning frame 2, a lower positioning frame 3 and four winches 4.

[0021] The plane of the upper positioning frame 2 is rectangular and is on the deck of a transport barge or platform ship 100 whose width is smaller than that of the upper positioning frame 2, so that the four corners of the upper positioning frame 2 protrude from the left and right sides of the deck of the transport barge or platform ship 100. The upper positioning frame 2 includes four upper positioning sleeves 21 with rectangular axial connection lines and four upper fixed brackets 22 connected one by one between the four upper positioning sleeves 21; the upper fixed brackets 22 adopt a spatial truss structure; the upper positioning frame 2 is welded and fixed to the deck of the transport barge or platform ship 100 by the four fixed brackets 22.

[0022] The plane of the lower positioning frame 3 is rectangular and has the same plane size as the upper positioning frame 2. The lower positioning frame 3 includes four lower positioning sleeves 31 with rectangular axial connection lines and four lower fixed brackets 32 connected one by one between the four lower positioning sleeves 31; an inverted cone-shaped guide cup 311 is coaxially fixed to the upper end of each lower positioning sleeve 31, and an annular anti-sinking plate 312 is coaxially fixed to the lower end of each lower positioning sleeve 31, and the outer diameter of the anti-sinking plate 312 is larger than the outer diameter of the lower positioning sleeve 31; the lower fixed bracket 32 ​​also adopts a spatial truss structure.

[0023] The four winches 4 are mounted on the deck of the transport barge or platform ship 100 in a one-to-one correspondence with the four upper positioning sleeves 21 on the upper positioning frame 2, and the steel slings 40 wound on the four winches 4 are connected to the four corners of the lower positioning frame 3 in a one-to-one correspondence. The four winches 4 need to bear the weight of the lower positioning frame 3.

[0024] See also Figure 2 and Figure 3 When the positioning device of the offshore wind power four-pile jacket foundation of the utility model is used to construct the engineering piles of the jacket foundation, the following steps are followed: the transport barge or platform ship 100 arrives at the site, the positioning frame 3 is lowered, the flatness of the lower positioning frame 3 is leveled, the engineering piles are lowered, the engineering piles are sunk, and the lower positioning frame 3 is retracted.

[0025] According to the longitude and latitude coordinates of the position of the aircraft, the self-propelled transport barge or platform ship 100 carries the positioning device of the utility model to the vicinity of the center of the aircraft position for rough positioning, and all anchors 10 are thrown for precise positioning; after the ship is positioned, the lower positioning frame 3 placed under the deck of the transport barge or platform ship 100 is slowly placed on the seabed by operating four winches 4, and the four anti-sinking plates 312 of the positioning frame 3 are lowered to prevent uneven settlement of the positioning frame 3 during installation, increase the contact area between the positioning frame 3 and the seabed, thereby ensuring the stability and safety of the positioning frame 3; if the lower positioning frame 3 is uneven, the lower positioning frame 3 is leveled by four winches 4, and after leveling, the steel slings 40 of the four winches 4 are fixed, such as Figure 2 shown.

[0026] After the lower positioning frame 3 is leveled, the engineering pile 5 is sunk. The engineering pile 5 is inserted from the upper positioning sleeve 21 of the upper positioning frame 2 and then inserted downward into the lower positioning sleeve 31 of the lower positioning frame 3. The guide cup 311 can facilitate the engineering pile 5 to enter the lower positioning sleeve 31. The initial sinking of the engineering pile 5 is performed by direct vibration sinking with a hydraulic hammer until the top of the engineering pile 5 is close to the top of the upper positioning sleeve 21. Finally, the pile driver is used in conjunction with the hydraulic hammer to sink the engineering pile 5 to the designed elevation. The principle of sinking engineering piles is to sink the diagonal engineering piles first, such as Figure 3 shown.

[0027] After the engineering piles are sunk, the lower positioning frame 3 is lifted to the bottom of the deck of the transport barge or platform ship 100 by four winches 4, and the surplus height between the top of the lower positioning frame 3 and the deck is maintained at least 3m. After the anchor is raised 10, the positioning device of the utility model moves with the transport barge or platform ship 100.

[0028] The above embodiments are only used to illustrate the present invention, rather than to limit the present invention. Technicians in the relevant technical field can make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should also belong to the scope of the present invention and should be defined by the claims.

Claims

1. A positioning device for an offshore wind power four-pile jacket foundation, based on a transport barge or a platform ship and comprising an upper positioning frame, a lower positioning frame and four winches; characterized in that: The upper positioning frame has a rectangular plane and is fixed on the deck of a transport barge or a platform ship whose width is smaller than that of the upper positioning frame. The upper positioning frame includes four upper positioning sleeves whose axis connecting lines are rectangular and four upper fixing brackets connected between the four upper positioning sleeves in a one-to-one correspondence. The plane of the lower positioning frame is rectangular and has the same plane size as the upper positioning frame. The lower positioning frame includes four lower positioning sleeves whose axis connecting lines are rectangular and four lower fixing brackets connected between the four lower positioning sleeves in a one-to-one correspondence; Four winches are installed on the deck of the transport barge or platform ship in a one-to-one correspondence with the four upper positioning sleeves on the upper positioning frame, and the steel slings wound on the four winches are connected to the four corners of the lower positioning frame in a one-to-one correspondence.

2. The positioning device for the offshore wind power four-pile jacket foundation according to claim 1 is characterized in that: The upper fixed bracket and the lower fixed bracket both adopt a space truss structure.

3. The positioning device for the offshore wind power four-pile jacket foundation according to claim 1 is characterized in that: An inverted cone-shaped guide cup is coaxially fixed to the upper end of the lower positioning sleeve.

4. The positioning device for the offshore wind power four-pile jacket foundation according to claim 1 or 3, characterized in that: An annular anti-sinking plate is coaxially fixed to the lower end of each lower positioning sleeve.

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