A combined offshore wind turbine jacket installation method

Abstract

The application discloses a combined offshore wind power jacket installation method, which comprises the following steps: firstly, a jacket is divided into an auxiliary jacket and a main jacket, and is transported to an offshore construction point by a transport ship, and the auxiliary jacket is built by adopting a horizontal assembly mode; then, the auxiliary jacket is hoisted and is settled by a suction bucket foundation arranged at the bottom of the auxiliary jacket; when being settled, the auxiliary jacket is settled and leveled by a sinking device in cooperation with the suction bucket foundation; the auxiliary jacket is settled to a seabed and is leveled once; the main jacket is hoisted and is guided by a sliding rail on the auxiliary jacket, the main jacket is assembled to the auxiliary jacket, and the main jacket is leveled twice; and finally, pile driving is performed at a pile insertion opening position of the main jacket. The combined jacket can reduce construction and transportation cost and difficulty.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of offshore wind power jacket installation, and particularly relates to a combined offshore wind power jacket installation method. BACKGROUND

[0002] With the development of offshore wind power, offshore wind power gradually develops towards the deep water field, in order to ensure the structural stability of the jacket, the jacket is increasingly large, which leads to the increasingly large offshore wind power jacket foundation form, and the manufacturing and transportation are increasingly difficult. At present, the water depth of the jacket is generally within 50 meters, and the water depth exceeding 70 meters will consider a floating foundation. Due to the large size of the deep water jacket, the deep water jacket loses the construction and cost advantage.

[0003] Although the offshore oil platform also adopts the jacket structure, the overall structural strength requirement is low due to the fact that the influence of the wind turbine load does not need to be considered, and therefore the conventional jacket structure can reach more than 100 meters in water depth. If the offshore wind turbine is constructed in the original way to build a deep water jacket, in order to meet the wind turbine load requirement, the jacket lower part opening size will be too large, and the overall foundation will be too large, which is not good for manufacturing and transportation.

[0004] The application solves the problem that the overall size of the offshore wind power deep water jacket is large, thereby causing the manufacturing and transportation difficulty, by combining and installing two jackets, and the auxiliary jacket first installs the guide frame serving as the main part of the jacket. SUMMARY

[0005] In order to make up for the deficiency of the prior art, the application provides a combined offshore wind power jacket installation method which is convenient for transportation and installation.

[0006] The combined offshore wind power jacket installation method comprises the following steps:

[0007] S1: the jacket is divided into an auxiliary jacket and a main jacket, and is transported to the offshore construction point by a transport ship;

[0008] S2: the auxiliary jacket is hoisted and is settled by the suction bucket foundation arranged at the bottom of the auxiliary jacket;

[0009] S3: the auxiliary jacket is settled to the seabed and is leveled once;

[0010] S4: the main jacket is hoisted, is guided by the slide rail on the auxiliary jacket, is assembled to the auxiliary jacket, and is leveled twice;

[0011] S5: pile driving is performed at the pile insertion opening position of the main jacket.

[0012] Further, the auxiliary conduit frame is used to provide the opening of the main body conduit frame, the height of the auxiliary conduit frame is 0.4-0.6 of the height of the main body conduit frame.

[0013] Further, the connecting point of the auxiliary conduit frame and the suction bucket foundation and the vertex of the corresponding conduit of the main body conduit frame are connected by a line L, and the line L and the connecting point of the auxiliary conduit frame and the suction bucket foundation form an angle of 8-20 degrees.

[0014] Further, the auxiliary conduit frame is constructed in a horizontal assembly mode.

[0015] Further, in steps S2-S4, the sinking and leveling are performed by the sinking equipment in cooperation with the suction bucket foundation.

[0016] Further, the auxiliary conduit frame is composed of four groups of slide rails, the auxiliary conduit is arranged on the slide rail, the auxiliary conduit extends outward, the top end of the auxiliary conduit is fixedly connected with the slide rail, and a support pipe is further arranged on the slide rail, one end of the support pipe is fixedly connected with the auxiliary conduit, and the other end is fixedly connected with the slide rail.

[0017] Further, the bottom of the slide rail is provided with an auxiliary anti-sinking plate, the slide rail has a circular arc structure, the inner concave surfaces of the four groups of slide rails are oppositely combined to form a guide structure of the auxiliary conduit frame, and the anti-sinking plate is arranged on the convex surface of the slide rail.

[0018] The auxiliary conduit is further provided with a reinforcing support frame composed of two intersecting conduits.

[0019] The bottom end of the auxiliary conduit is provided with a vertical upward suction pipe, the suction bucket foundation is arranged below the suction pipe, and the suction pipe is in communication with the suction bucket foundation.

[0020] Further, the main body conduit frame is composed of four groups of main body conduits, the top of the main body conduit is provided with a fan tower, and the bottom is provided with a main body anti-sinking plate, and the main body conduit slides downward along the inner concave surface of the slide rail during installation.

[0021] Further, the main body anti-sinking plate is a horseshoe anti-sinking plate, which comprises a connecting section and a supporting section, the connecting section is connected with the inner side of the main body conduit, the slide rail is limited between the two supporting sections, and a reinforcing rod is arranged between the main body conduits.

[0022] Further, the supporting section is provided with a pile insertion port, and the pile is driven into the seabed through the pile insertion port.

[0023] Compared with the prior art, the present application has the following advantages:

[0024] The combined installation of the jacket can reduce the construction, transportation cost and difficulty. The combined installation can reduce the scale requirement of the offshore construction equipment, and the large installation is divided into multiple parts of installation, the height of the jacket is controlled by the main part, and the opening of the jacket is controlled by the auxiliary jacket to adapt to different water depths.

[0025] The auxiliary jacket can serve as a guide frame of the main jacket through the suction bucket foundation to improve the installation accuracy and reduce the installation difficulty. The main jacket has two pile insertion ports on each anti-sinking plate, and a total of eight pile legs, which can reduce the piling depth of each pile leg and reduce the piling difficulty. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a schematic view of a jacket structure for offshore wind power;

[0027] Figure 2 is a schematic view of an auxiliary jacket structure;

[0028] Figure 3 is a schematic view of a main jacket structure;

[0029] Figure 4 is a schematic view of the bottom structure of the main jacket;

[0030] Figure 5 is a schematic view of the assembly of the auxiliary jacket;

[0031] Figure 6 is a schematic view of the assembly of the main jacket and the auxiliary jacket;

[0032] Figure 7 is an installation effect diagram of the auxiliary jacket and the main jacket. DETAILED DESCRIPTION

[0033] The present application will be further described below with reference to the accompanying drawings.

[0034] As shown in Figures 1-6 , a combined offshore wind power jacket installation method, first, the jacket is divided into an auxiliary jacket 1 and a main jacket 2, and is transported to the offshore construction point by a transport ship, the auxiliary jacket 1 is built in a horizontal assembly manner. Then, the auxiliary jacket 1 is hoisted and settled through the suction bucket foundation arranged at the bottom of the auxiliary jacket 1. During the settlement, the settlement and leveling are carried out through the sinking equipment in cooperation with the suction bucket foundation.

[0035] The auxiliary jacket 1 is then settled on the seabed and leveled once. The main jacket 2 is hoisted and guided through the slide rail on the auxiliary jacket 1, and is assembled to the auxiliary jacket 1 for secondary leveling. Finally, the pile insertion port of the main jacket 2 is processed.

[0036] The auxiliary guide pipe frame 1 is used to provide a tail opening of the main body guide pipe frame 2, the height of the auxiliary guide pipe frame 1 is 0.4-0.6 of the height of the main body guide pipe frame 2. The connection point of the auxiliary guide pipe frame 1 with the suction bucket foundation and the vertex of the corresponding guide pipe of the main body guide pipe frame 2 are connected by a line L, and the line L and the connection point of the auxiliary guide pipe frame 1 with the suction bucket foundation form an angle of 8°-20°.

[0037] Specifically, the auxiliary guide pipe frame 1 is composed of four groups of slide rails 101, the slide rails are provided with auxiliary guide pipes 102 extending outward, the top end of the auxiliary guide pipe 102 is fixedly connected with the slide rail 101, and the slide rail 101 is further provided with a support pipe 103, one end of the support pipe 103 is fixedly connected with the auxiliary guide pipe 102, and the other end is fixedly connected with the slide rail 101. The slide rail 101 is provided with an auxiliary anti-sinking plate 104 at the bottom, the slide rail 101 has a circular arc structure, the inner concave surfaces of the four groups of slide rails 101 are oppositely combined to form a guide structure of the auxiliary guide pipe frame 1, and the anti-sinking plate 104 is arranged on the convex surface of the slide rail 101.

[0038] The auxiliary guide pipes 102 are further provided with a reinforcing support frame 105 composed of two intersecting guide pipes. The bottom end of the auxiliary guide pipe 102 is provided with a vertically upward suction pipe 106, and the suction bucket foundation 5 is arranged below the suction pipe 106, and the suction pipe 106 is in communication with the suction bucket foundation 5.

[0039] The main body guide pipe frame 2 is composed of four groups of main body guide pipes 201, the top of the main body guide pipe 201 is provided with a fan tower 202, and the bottom is provided with a main body anti-sinking plate 203. During installation, the main body guide pipe 201 slides downward along the inner concave surface of the slide rail 101. The main body anti-sinking plate 203 is a horseshoe anti-sinking plate, which comprises a connecting section 2031 and a supporting section 2032. The connecting section 2031 is connected with the inner side of the main body guide pipe 201, and the slide rail 101 is limited between the two supporting sections 2032. The main body guide pipes 201 are provided with reinforcing rods 204. The supporting section 2032 is provided with a pile insertion opening 205, and the pile 4 is driven into the seabed through the pile insertion opening 205.

[0040] In use, according to actual needs, the offshore wind power guide pipe frame is divided into multiple parts, and in the embodiment, the guide pipe frame is composed of two parts, i.e. the auxiliary guide pipe frame 1 and the main body guide pipe frame 2. The auxiliary guide pipe frame 1 acts as a guide frame for part of the main body guide pipe frame 2. After the two parts of the guide pipe frame are manufactured onshore, they are transported to the offshore construction site by a transport ship.

[0041] Then the auxiliary guide pipe frame 1 is installed to the corresponding position, for example, Figure 1As shown, the suction barrel foundation is embedded in the seabed, and the auxiliary anti-sinking plate 104 holds the seabed in place to prevent the auxiliary jacket 1 from sinking. The sinking device is connected to the suction hole at the top of the suction pipe 106 to sink the auxiliary jacket 1 until it contacts the seabed. Then, the sinking device is used in conjunction with the suction barrel foundation for leveling.

[0042] The main guide frame 2 is lifted using hoisting equipment, and the main guide frame 201 is placed on the seabed with the slide rail 101. Secondary leveling is performed using the suction bucket foundation of the auxiliary guide frame section. A horseshoe-shaped anti-sinking plate is installed at the bottom of the main guide frame 201, with two sets of pile insertion holes. After the main guide frame 1 is placed on the seabed, piles 4 are driven into the seabed through the pile insertion holes, a total of eight piles. Grouting material is then injected between the pile insertion holes and the pile legs for fixation.

[0043] Combination Figure 1 The auxiliary jacket 1 mainly provides the heel opening of the traditional jacket, and different heel openings can be designed and cast to adapt to different load strengths. The main jacket 2 mainly provides the height of the traditional jacket, which can be adjusted to adapt to different water depths. The auxiliary jacket 1 can also serve as the guide frame for the main jacket 2. The main jacket 2 is installed in conjunction with the auxiliary jacket by adjusting the shape of the anti-sinking plate.

[0044] The auxiliary jacket can be adjusted in size at the bottom to match the main jacket and adapt to different load strengths. (Refer to...) Figure 7 The angle between the line L shown and the vertical direction is typically controlled between 8° and 20° depending on the load. The height of the auxiliary jacket is controlled within the range of 0.6-0.4 times the height of the main jacket. The auxiliary jacket is designed and manufactured with its bottom dimensions based on the height of the matching main jacket. The auxiliary jacket is assembled using traditional horizontal assembly during construction.

[0045] Modular jacket installation reduces construction and transportation costs and complexity. Modular installation also reduces the size requirements for offshore construction equipment, breaking down a large installation into multiple parts. The height of the jacket is controlled by the main body, while the opening and closing of the jacket are controlled by auxiliary jackets, adapting to different water depths.

[0046] The auxiliary jacket support, via a suction bucket foundation, can act as a guide frame for the main jacket support, improving installation accuracy and reducing installation difficulty. Each anti-settlement plate of the main jacket support has two pile insertion holes, totaling eight pile legs, which reduces the pile driving depth for each leg and lowers the pile driving difficulty.

Claims

1. A combined offshore wind power jacket installation method, characterized in that The method comprises the following steps: S1: the guide pipe frame is divided into an auxiliary guide pipe frame (1) and a main guide pipe frame (2), and is transported to a sea construction point by a transport ship; S2: the auxiliary guide pipe frame (1) is hoisted and settled by a suction bucket foundation arranged at the bottom of the auxiliary guide pipe frame (1); S3: the auxiliary guide pipe frame (1) is settled to the seabed and is leveled once; S4: the main guide pipe frame (2) is hoisted and guided by the slide rail on the auxiliary guide pipe frame (1), and is assembled to the auxiliary guide pipe frame (1) to be leveled twice; S5: pile driving is performed at the pile insertion opening position of the main guide pipe frame (2). The main guide pipe frame (2) is composed of four groups of main guide pipes (201), the top of the main guide pipe (201) is provided with a fan tower (202), and the bottom is provided with a main anti-sinking plate (203), and the main guide pipe (201) slides downward along the inner concave surface of the slide rail (101) during installation. The auxiliary guide pipe frame (1) is used to provide a tail opening of the main guide pipe frame (2), the height of the auxiliary guide pipe frame (1) is 0.4-0.6 times the height of the main guide pipe frame (2), the connection point of the auxiliary guide pipe frame (1) and the suction bucket foundation and the vertex of the corresponding guide pipe of the main guide pipe frame (2) are connected by a line L, and the angle between the line L and the vertical direction is 8°-20°. The auxiliary guide pipe frame (1) is composed of four groups of slide rails (101), the slide rail is provided with an auxiliary guide pipe (102), the auxiliary guide pipe (102) extends outward, the top end of the auxiliary guide pipe (102) is fixedly connected with the slide rail (101), the slide rail (101) is further provided with a support pipe (103), one end of the support pipe (103) is fixedly connected with the auxiliary guide pipe (102), and the other end is fixedly connected with the slide rail (101), the bottom of the slide rail (101) is provided with an auxiliary anti-sinking plate (104), the slide rail (101) has a circular arc structure, the inner concave surfaces of the four groups of slide rails (101) face each other and are combined to form a guide structure of the auxiliary guide pipe frame (1), and the anti-sinking plate (104) is arranged on the convex surface of the slide rail (101). The auxiliary guide pipes (102) are further provided with a reinforcing support frame (105), the reinforcing support frame (105) is composed of two intersecting guide pipes, the bottom end of the auxiliary guide pipe (102) is provided with a vertical upward suction pipe (106), a suction bucket foundation (5) is arranged below the suction pipe (106), and the suction pipe (106) is in communication with the suction bucket foundation (5).

2. A method of installing a combined offshore wind and jacket platform according to claim 1, wherein, The auxiliary guide pipe frame (1) is constructed in a horizontal assembly mode.

3. A method of installing a combined offshore wind and jacket platform according to claim 1, wherein, In steps S2-S4, the sinking and leveling are performed by a sinking device in cooperation with the suction bucket foundation.

4. A method of installing a combined offshore wind and jacket platform according to claim 1, wherein, The main anti-sinking plate (203) is a horseshoe anti-sinking plate, comprising a connecting section (2031) and a supporting section (2032), the connecting section (2031) is connected with the inner side of the main guide pipe (201), the slide rail (101) is limited between the two groups of supporting sections (2032), and the main guide pipes (201) are provided with reinforcing rods (204).

5. A method of installing a combined offshore wind and jacket platform according to claim 4, wherein, The support section (2032) is provided with a pile insertion opening (205), and the pile (4) is inserted into the seabed through the pile insertion opening (205).

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