Rapid positioning device for offshore anchor bolt cage

Abstract

The utility model discloses a rapid positioning device for an offshore anchor bolt cage. The rapid positioning device is composed of a model base, a limiting device and a positioning rod. The model base is a circular ring body or a circular disc body of which the outer diameter is the same as that of a lower anchor plate of the anchor bolt cage, and a through hole through which the positioning rod can penetrate is formed in the center of the model base; the limiting device is composed of four same limiting blocks, each limiting block is a block body with the top face being an inclined face, and a right-angle notch is formed in the low-position vertex angle of each limiting block through common cutting from the top side inclined face in the vertical direction and from the adjacent side face in the horizontal direction; the positioning rod is a cylindrical rod body, and the axial length of the positioning rod is larger than that of the model base. When the device is applied to on-site anchor bolt cage construction operation of offshore wind power, the installation and leveling procedures of the anchor bolt cage can be saved, the overall installation time is shortened, meanwhile, the labor cost in construction is reduced, the investment of offshore construction auxiliary facilities and construction ship machine equipment is effectively reduced, and the positioning precision and the installation efficiency of the anchor bolt cage are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of offshore wind power high pile cap foundation, in particular to a rapid positioning device for an offshore anchor bolt cage. Background Art

[0002] At present, offshore wind power in Zhejiang waters mostly adopts two forms: single pile foundation and high pile cap foundation. Among them, the high pile cap foundation is built based on multiple inclined piles deep in the seabed. This foundation has a large structural rigidity and good bearing capacity, and can effectively resist the erosion of natural factors such as wind, waves, and currents, and maintain overall stability. At the same time, compared with the single pile foundation, the high pile cap foundation has a great advantage in horizontal impact force, so it is usually used by us at the outermost part of the wind farm to effectively prevent ship collisions, thereby ensuring the stable operation of the entire wind farm. Therefore, as offshore wind power projects will develop into the deep sea, the high pile cap will inevitably have greater advantages than the single pile.

[0003] However, with the gradual increase in wind turbine capacity, the high pile cap foundation also puts forward higher requirements for the construction of anchor cages, the connection parts between wind turbines and foundations. In order to ensure that the structural strength and stability of the cap foundation match the wind turbine, the high-precision and rapid positioning of the anchor cages on the cap is essential. However, due to the variability of the offshore environment, the high-precision positioning of the anchor cages during the hoisting process using traditional GPS technology is often affected by weak signals at sea, resulting in construction suspension, serious impact on construction progress, and low construction efficiency; therefore, it is necessary to improve the offshore anchor cage positioning construction process to achieve high-precision and rapid positioning of offshore anchor cages. Utility Model Content

[0004] The utility model aims to provide a rapid positioning device for an offshore anchor cage which solves the above-mentioned problems of the prior art.

[0005] To this end, the technical solution of the utility model is as follows:

[0006] A rapid positioning device for an offshore anchor cage, comprising a model base, a limiting device and a positioning rod; wherein the model base is a circular annular body or a circular disk body with an outer diameter the same as that of a lower anchor plate of the anchor cage, and a through hole capable of penetrating the positioning rod is provided at the center thereof; the limiting device is composed of four identical limiting blocks, wherein the limiting blocks are blocks with inclined top surfaces, so that the top sides of the four limiting blocks uniformly arranged along the circumferential direction can jointly form an inwardly concave non-continuous guiding cone surface; a right-angle notch is formed at the low-position top angle of each limiting block by jointly cutting from the inclined top surface in the vertical direction and from the adjacent side surfaces in the horizontal direction, so that the horizontal surfaces of the right-angle notches on the four limiting blocks can jointly form an annular non-continuous supporting platform; the positioning rod is a cylindrical rod body, and its axial length is greater than the axial length of the model base, so that the vertically arranged positioning rod can be inserted into the insertion hole of the pile foundation platform at the lower side and inserted into the central through hole of the model base at the upper side, so as to be coaxially arranged with the model base.

[0007] Furthermore, the model base is composed of an annular body, multiple connecting reinforcement rods and a cylindrical sleeve; the cylindrical sleeve is centrally arranged in the annular body in a coaxial manner with the annular body, and the multiple connecting reinforcement rods are radially distributed between the annular body and the cylindrical sleeve along the circumferential direction, and the two ends of each connecting reinforcement rod are respectively fixed on the annular inner wall of the annular body and the outer wall of the cylindrical sleeve.

[0008] Furthermore, the model base is a steel model base or an engineering plastic model base.

[0009] Furthermore, the horizontal plane elevation of the right-angle notch on the limit block is adapted to the set spacing from the anchor cage to the pile foundation platform surface.

[0010] Furthermore, the limit block is a steel limit block, and the positioning rod is a steel rod.

[0011] Furthermore, the outer diameter of the positioning rod is adapted to the inner diameter of the cylindrical sleeve, so that the positioning rod can be vertically inserted into the cylindrical sleeve.

[0012] Compared with the prior art, the rapid positioning device of the offshore anchor cage is composed of a model base, a limit device and a positioning rod. Its application in on-site anchor cage construction operations of offshore wind power can not only save the installation and leveling process of the anchor cage and reduce the overall installation time, but also reduce the manpower cost in construction, effectively reduce the investment in offshore construction auxiliary facilities and construction ship machinery and equipment, and improve the positioning accuracy and installation efficiency of the anchor cage; in addition, the model base of the rapid positioning device of the offshore anchor cage can be reused repeatedly, which can further reduce the construction cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of a rapid positioning device for an offshore anchor cage of the utility model;

[0014] Figure 2 The utility model is a schematic structural diagram of a limit plate of a rapid positioning device for an offshore anchor cage. DETAILED DESCRIPTION

[0015] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the following embodiments are by no means intended to limit the present invention in any way.

[0016] See also Figure 1 The rapid positioning device of the offshore anchor cage is composed of a model base 1, a limiting device 2 and a positioning rod 3.

[0017] The model base 1 consists of an annular body 1a, ten connecting reinforcement rods 1b and a cylindrical sleeve 1c; wherein the annular body 1a is a circular annular body with an outer diameter the same as the outer diameter of the anchor plate under the anchor cage, so as to simulate the anchor cage for pre-positioning; the cylindrical sleeve 1c is centrally arranged in the annular body 1a in a coaxial manner with the annular body 1a, and the ten connecting reinforcement rods 1b are radially evenly arranged between the annular body 1a and the cylindrical sleeve 1c along the circumferential direction, and the two ends of each connecting reinforcement rod 1b are respectively fixed on the annular inner wall of the annular body 1a and the outer wall of the cylindrical sleeve 1c.

[0018] In this embodiment, the model base 1 is specifically based on the size of the anchor plate of the anchor cage and is made of a polycarbonate material by integral injection molding. It is lightweight and has the advantages of being easy to hoist and manually fine-tune its position.

[0019] See also Figure 2 The limiting device 2 is composed of four identical limiting blocks 2a; specifically, the limiting block 2a is a right-angled trapezoidal platform with an inclined surface facing upward, so that the top sides of the four limiting blocks 2a evenly distributed along the circumferential direction can jointly form an inwardly concave non-continuous guiding cone surface for guiding the lowering of the anchor cage; at the same time, a right-angle notch 2b is formed at the low top angle of each limiting block 2a by cutting from the top side inclined surface B in the vertical direction and from the adjacent side surface A in the horizontal direction, so that the horizontal surfaces of the right-angle notches 2b on the four limiting blocks 2a can jointly form an annular non-continuous supporting platform for supporting the anchor cage.

[0020] Among them, during the construction of the anchor cage, the anchor cage needs to be installed and fixed with a distance from the pile foundation platform surface, so a steel frame needs to be set up underneath the anchor cage before hoisting it; and in the present application, in addition to quickly positioning the anchor cage, the limiting device 2 also has the effect of supporting the anchor cage so that it has a set distance from the pile foundation platform surface. Specifically, in the present embodiment, the horizontal plane elevation of the right-angle notch 2b on the limiting block 2a (i.e., the distance a from the horizontal plane to the bottom surface of the limiting block 2a) is adapted to the set distance from the anchor cage to the pile foundation platform surface. Specifically, the horizontal plane elevation of the right-angle notch 2b is the same as the set distance between the anchor cage and the pile foundation platform surface, and the deviation is controlled at 0 to -5 mm.

[0021] In order to ensure stable support of the anchor cage, the load-bearing capacity of the limit device 2 should be compatible with the weight of the anchor cage; in this embodiment, the limit block 2a is a steel structure to ensure that the limit device 2 has sufficient structural strength while facilitating its welding and fixing on the corresponding positioning steel plate on the pile foundation platform.

[0022] The positioning rod 3 is a cylindrical steel rod, and its outer diameter is adapted to the inner diameter of the cylindrical sleeve 1c of the model base 1, so that the positioning rod 3 can be vertically inserted into the cylindrical sleeve 1c; the axial length of the positioning rod 3 is greater than the axial length of the cylindrical sleeve 1c, so that in addition to being inserted into the cylindrical sleeve 1c, it also reserves a length for being inserted into the hole on the pile foundation platform. In this embodiment, the axial length of the positioning rod 3 is 5 cm greater than the axial length of the cylindrical sleeve 1c, and the lower side of the positioning rod 3 is pre-embedded and fixed in a preset hole on the pile foundation platform.

[0023] The specific construction method of using the rapid positioning device of the offshore anchor cage to complete the construction of the anchor cage is as follows:

[0024] S1. During the construction of the offshore wind power high pile foundation, after multiple inclined piles are inserted into the seabed to complete the pile foundation construction, a pile foundation platform is set up on the top side of the pile foundation formed by the multiple inclined piles, and the first phase of concrete pouring is completed to form a disc-shaped concrete pile foundation platform;

[0025] S2. A blind positioning hole that is adapted to the size of the positioning rod 3 is opened at the center of the top surface of the concrete pile foundation platform, and the positioning rod 3 is inserted and fixed in the blind positioning hole, or pre-embedded and fixed in the blind positioning hole;

[0026] S3, through the cylindrical sleeve 1c on the model base 1, the model base 1 prefabricated according to the size of the anchor cage anchor plate is placed on the positioning rod 3 and placed horizontally on the pile foundation platform; a line is drawn along the outer edge of the model base 1 to predetermine the lifting and lowering position of the anchor cage on the top surface of the pile foundation platform; after the anchor cage position is drawn, the model base 1 is removed;

[0027] S4. According to the anchor cage position line drawn above, a positioning steel plate is horizontally arranged at each of the four directions of the pile foundation platform, namely, the southeast, northwest, and northeast directions. The positioning steel plates are fixed in four steel plate fixing grooves pre-opened on the pile foundation platform through ground bolts, and the top surface of the positioning steel plates is flush with the pile foundation platform; four identical limit blocks 2a of the limit device 2 are respectively placed on the four positioning steel plates, so that the four limit blocks 2a are radially arranged along the circumferential direction with the right-angle notches 2b on them facing the positioning rod 3, and the right-angle notches 2b on the four limit blocks 2a correspond to the anchor cage position line drawn on the pile foundation platform, so as to ensure that after the anchor cage is hoisted to the designated lowering position, the lower anchor plate of the anchor cage is just pressed on the horizontal plane of the right-angle notches 2b on the four limit blocks 2a, that is, to ensure that the anchor cage is hoisted to the designated position in one step using the limit device 2;

[0028] S5. Temporarily fix the level gauge on each limit block 2a in turn, so that the limit block 2a is welded and fixed on the positioning steel plate in a way that the horizontal plane of the right-angle notch 2b on it is kept absolutely horizontal, and the elevation deviation of the horizontal plane of the right-angle notch 2b is controlled within the range of 0 to -5mm, so as to determine the elevation of the anchor cage relative to the pile foundation platform in advance;

[0029] S6. Use a crane to lift the anchor cage to the top of the limit device 2 of the pile foundation platform, and slowly slide it down along the top side slopes of the four limit plates 2a until it falls to the horizontal plane of the right-angle notches 2b of the four limit blocks 2a, completing the rapid centering of the anchor cage while ensuring that the plane position meets the requirements;

[0030] S7. Carry out the second phase of concrete pouring on the pile foundation platform to complete the construction of the offshore pile foundation platform.

[0031] The rapid positioning device of the offshore anchor cage has been currently used in the construction of the wind turbine foundation and wind turbine installation construction project section Ⅰ pile foundation of the Huaneng Daishan No. 1 offshore wind farm project; after actual application, the device can save about 2 hours of installation and leveling process of each anchor cage in the on-site anchor cage construction of offshore wind power, save 60% of the overall installation time, and save 2 manpower. It can effectively reduce the investment in offshore construction auxiliary facilities and construction ship machinery equipment, and improve the positioning accuracy and installation efficiency of the anchor cage.

Claims

1. A rapid positioning device for an offshore anchor cage, characterized in that: The invention is composed of a model base (1), a limiting device (2) and a positioning rod (3); wherein the model base (1) is a circular ring body or a circular disk body having an outer diameter the same as the outer diameter of the lower anchor plate of the anchor cage, and a through hole capable of passing the positioning rod (3) is provided at the center thereof; the limiting device (2) is composed of four identical limiting blocks (2a), each limiting block (2a) being a block body with an inclined top surface, so that the top sides of the four limiting blocks (2a) evenly distributed along the circumferential direction can jointly form an inwardly concave non-continuous guiding cone surface; the low position top angle of each limiting block (2a) is A right-angle notch (2b) is formed by cutting from the top side inclined surface in the vertical direction and from the adjacent side surface in the horizontal direction, so that the horizontal surfaces of the right-angle notches (2b) on the four limit blocks (2a) can jointly form an annular non-continuous support platform; the positioning rod (3) is a cylindrical rod body, and its axial length is greater than the axial length of the model base (1), so that the vertically arranged positioning rod (3) can be inserted into the insertion hole of the pile foundation platform at the bottom and inserted into the central through hole of the model base (1) at the top, so as to be coaxially arranged with the model base (1).

2. The rapid positioning device for offshore anchor cage according to claim 1, characterized in that: The model base (1) is composed of an annular body (1a), a plurality of connecting reinforcement rods (1b) and a cylindrical sleeve (1c); the cylindrical sleeve (1c) is centrally arranged in the annular body (1a) in a coaxial arrangement with the annular body (1a); the plurality of connecting reinforcement rods (1b) are evenly arranged radially along the circumferential direction between the annular body (1a) and the cylindrical sleeve (1c); and the two ends of each connecting reinforcement rod (1b) are respectively fixed on the annular inner wall of the annular body (1a) and the outer wall of the cylindrical sleeve (1c).

3. The rapid positioning device for offshore anchor cage according to claim 1, characterized in that: The model base (1) is a steel model base or an engineering plastic model base.

4. The rapid positioning device for offshore anchor cage according to claim 1, characterized in that: The horizontal plane elevation of the right-angle notch (2b) on the limit block (2a) is adapted to the set distance between the anchor cage and the pile foundation platform surface.

5. The rapid positioning device for offshore anchor cage according to claim 1, characterized in that: The limit block (2a) is a steel limit block, and the positioning rod (3) is a steel rod.

6. The rapid positioning device for offshore anchor cage according to claim 2, characterized in that: The outer diameter of the positioning rod (3) is adapted to the inner diameter of the cylindrical sleeve (1c), so that the positioning rod (3) can be vertically inserted into the cylindrical sleeve (1c).

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