A sleeve-type underwater pile positioning frame device with auxiliary piles and construction method

Abstract

The invention discloses a sleeve-type underwater pile positioning frame device with auxiliary piles and a construction method. The pile positioning frame includes an intermediate sleeve, which is an upright hollow cylinder structure for sleeve connection with the auxiliary piles; a positioning frame connected to the outer periphery of the bottom end of the intermediate sleeve; an engineering pile sleeve, which has at least three and is connected to the positioning frame, and has a columnar space for inserting the engineering piles, and the geometric centers of at least three engineering pile sleeves are located on the axis of the intermediate sleeve; a leveling device, which is arranged in multiple groups along the axial direction of the intermediate sleeve, and each group of leveling devices includes multiple leveling oil cylinders uniformly arranged on the peripheral wall of the intermediate sleeve along the circumference of the auxiliary piles; the fixed ends of the multiple leveling oil cylinders are fixed to the intermediate sleeve, and the telescopic ends act on the auxiliary piles in the intermediate sleeve. This sleeve-type underwater pile positioning frame device has a light structure, low requirements on ship machinery and equipment, low construction difficulty, and high leveling accuracy of the pile positioning frame, and can be applied to the pile construction of the positioning frame foundation in deeper sea areas.

Description

Technical Field

[0001] The invention relates to the technical field of offshore wind power conduit foundation construction, and in particular to a sleeve-type underwater pile positioning frame device with auxiliary piles and a construction method. Background Art

[0002] As offshore wind power develops towards deep sea, the form of wind turbine foundation selection also changes accordingly. At present, most of the offshore wind power projects under construction in China are shallow water (10-35m). Most of the pile sinking positioning frames are water-based bottom-seat structures. As offshore wind power develops towards deep sea, the water-based bottom-seat positioning frames are very heavy and have high requirements for ship machinery and equipment, and will no longer be applicable. Therefore, it is necessary to design an underwater pile sinking positioning frame device that has high structural strength, high stability, light weight, and low requirements for ship machinery and equipment, which can be applied to the construction of deep-sea wind turbine foundations.

[0003] The jacket foundation will be the mainstream foundation form for deep-sea wind turbines, and the jacket with pile first method is the most economical choice. For example, the Chinese invention patent with publication number CN107700453A discloses a jacket and a jacket installation method. Before the jacket is sunk into place using a lifting device, it is necessary to first drive three pipe piles of the jacket pile foundation into the seabed, and then put the three pile sleeves of the jacket on the corresponding pipe piles, and use the leveling device on the pile sleeve to level the jacket, and finally pour slurry into the annular space formed between the pile sleeve and the pipe pile to fix the jacket.

[0004] However, the relative spacing between the three pipe piles of the jacket foundation is difficult to control, and it is difficult to accurately sleeve the three pile sleeves of the jacket on the corresponding pipe piles; moreover, the leveling devices on the three pile sleeves independently level the pile sleeves, resulting in unstable overall leveling of the jacket. Therefore, it is necessary to design an underwater pile positioning frame device and construction method that is suitable for deep-sea wind turbine foundation construction with low construction difficulty, good stability of the leveling system, light weight, and low requirements for ship and engine settings. Summary of the invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defects of the underwater pile positioning frame in the prior art, such as high construction difficulty, poor stability of the leveling system, large deadweight, and high requirements for ship machinery settings, thereby providing a sleeve-type underwater pile positioning frame device with auxiliary piles and a construction method.

[0006] In order to solve the above technical problems, the technical solution of the present invention is as follows:

[0007] A sleeve-type underwater pile positioning frame device with auxiliary piles, comprising:

[0008] The middle casing is an upright hollow cylindrical structure used for connection with the auxiliary pile;

[0009] A positioning frame connected to the outer periphery of the bottom end of the intermediate sleeve, with its center of gravity located on the axis of the intermediate sleeve;

[0010] There are at least three engineering pile casings connected to the positioning frame; the geometric centers of at least three engineering pile casings are located on the axis of the middle casing; the engineering pile casings have a columnar space for inserting engineering piles;

[0011] A plurality of leveling devices are arranged axially along the intermediate sleeve, and each group of the leveling devices comprises a plurality of leveling cylinders uniformly arranged on the peripheral wall of the intermediate sleeve along the circumference of the auxiliary piles; the fixed ends of the plurality of leveling cylinders are fixed to the intermediate sleeve, and the telescopic ends act on the auxiliary piles in the intermediate sleeve to adjust the verticality of the intermediate sleeve.

[0012] Furthermore, the positioning frame includes a horizontal support connected between the engineering pile casing and the intermediate casing, and a diagonal support between one end of the horizontal support close to the engineering pile casing and a portion of the intermediate casing located on the horizontal support.

[0013] Furthermore, an anti-sinking plate is fixed to the lower end surface of the horizontal bracket, and the plate surface of the anti-sinking plate covers the lower bottom surface of the horizontal bracket.

[0014] Furthermore, the horizontal support includes an upper frame and a lower frame that are parallel to each other and horizontally arranged, and support beams supported between the engineering pile casing and the intermediate casing, between the upper frame and the intermediate casing, between the lower frame and the intermediate casing, and between the upper frame and the lower frame.

[0015] Furthermore, the outer periphery of the upper end of the intermediate sleeve is connected to a supporting truss; the leveling device includes a leveling device combination one, a leveling device combination two, a leveling device combination three, and a leveling device combination four, which are arranged in sequence from top to bottom along the axis of the intermediate sleeve; the leveling device combination one is located at the connection point between the intermediate sleeve and the supporting truss; the leveling device combination two is located at the connection point between the intermediate sleeve and the diagonal brace bracket; the leveling device combination three is located at the connection point between the intermediate sleeve and the upper end frame; and the leveling device combination four is located at the connection point between the intermediate sleeve and the lower end frame.

[0016] Furthermore, the axes of at least three of the engineering pile casings are parallel to the axis of the middle casing.

[0017] Furthermore, a wellhead guide structure is provided at the upper end of the engineering pile casing.

[0018] Furthermore, a guide rib is provided on the outer peripheral wall of the upper end of the engineering pile casing close to the wellhead guide structure.

[0019] Furthermore, there are four engineering pile casings, which are arranged in a square shape and the middle casing is located at the center of the square formed by the four engineering pile casings.

[0020] On the other hand, the present invention also provides a construction method of a sleeve-type underwater pile positioning frame device with auxiliary piles, which is used to drive the sleeve-type underwater pile positioning frame device with auxiliary piles as described above into the bottom of the water, comprising the following steps:

[0021] Step S10, auxiliary pile sinking operation: using a vibrating hammer to drive the auxiliary pile at a preset position on the bottom of the water, and using the vibrating hammer to adjust the verticality of the auxiliary pile during the piling process;

[0022] Step S20, inserting a pile positioning frame: inserting the pile positioning frame into the auxiliary pile from the middle sleeve thereof, so that the pile positioning frame enters the water bottom along the guide of the auxiliary pile, and the anti-sinking plate at the bottom of the pile positioning frame sinks into the mud surface;

[0023] Step S30, leveling the pile positioning frame: using multiple sets of leveling devices arranged along the axial direction of the intermediate casing to adjust the gap between the intermediate casing and the auxiliary piles at various locations in the axial direction, so that the horizontality of the supporting truss at the upper end of the intermediate casing is controlled within a set range;

[0024] Step S40, inserting the engineering piles: inserting the engineering piles into the engineering pile casings on the periphery of the pile sinking positioning frame, the guide ribs provided on the engineering pile casings ensure that the engineering piles sink vertically, and the construction is completed when the engineering piles are in place.

[0025] The technical solution of the present invention has the following advantages:

[0026] 1. The sleeve-type underwater pile positioning frame device with auxiliary piles provided by the present invention has a light structure and low requirements on ship machinery and equipment compared with the bottom-sit positioning frame in the prior art, and can be applied to the pile construction of the conductor frame foundation piles at a water depth of more than 35m; first, an upright auxiliary pile is driven, and then the middle sleeve of the pile positioning frame is sleeved on the auxiliary pile, and the pile positioning frame is supported on the seabed by its own weight in the vertical direction, and the gap between the middle sleeve and the auxiliary piles at various locations in the circumference of the middle sleeve is adjusted in the horizontal direction by using multiple groups of leveling cylinders arranged along the radial direction of the middle sleeve, so as to adjust the flatness of the positioning frame, and then engineering piles are inserted into the four engineering pile casings, so that the spacing between the four engineering piles can be well controlled; it has the advantages of low construction difficulty and high relative position accuracy between the four engineering piles.

[0027] 2. The sleeve-type underwater pile positioning frame device with auxiliary piles provided by the present invention is a positioning frame with a frame structure composed of horizontal supports and diagonal support supports, which can reduce the overall dead weight of the entire pile positioning frame while ensuring that the overall strength of the pile positioning frame meets the support requirements.

[0028] 3. In the sleeve-type underwater pile positioning frame device with auxiliary piles provided by the present invention, the anti-sinking plate can be sunk into the bottom of the seabed, thereby ensuring the flatness of the pile positioning frame on the seabed.

[0029] 4. The sleeve-type underwater pile positioning frame device with auxiliary piles provided by the present invention is a horizontal bracket of a frame structure composed of an upper frame, a lower frame and a supporting frame. Compared with the bottom seating structure of the underwater pile positioning frame with a solid structure, the structure has a lighter weight, lower requirements on ship machinery and equipment, and reduces construction costs.

[0030] 5. The sleeve-type underwater pile positioning frame device with auxiliary piles provided by the present invention has four sets of leveling devices respectively arranged at the connection nodes between the middle sleeve and the supporting truss, the connection nodes between the middle sleeve and the diagonal brace bracket, the connection nodes between the middle sleeve and the upper end frame, and the connection nodes between the middle sleeve and the lower end frame. An independent set of leveling devices is arranged at the four main stress points of the middle sleeve. The multiple leveling cylinders of each set of leveling devices can adjust the gap between the middle sleeve and the auxiliary piles at various circumferential locations, so as to better realize the leveling of the verticality of the pile positioning frame.

[0031] 6. In the sleeve-type underwater pile positioning frame device with auxiliary piles provided by the present invention, a wellhead guide structure is arranged at the upper end of the engineering pile casing to facilitate the lowering of the engineering pile.

[0032] 7. The sleeve-type underwater pile positioning frame device with auxiliary piles provided by the present invention and the arrangement of guide ribs on the engineering pile casing can ensure the verticality requirement of the engineering pile during the lowering process.

[0033] 8. The construction method of the sleeve-type underwater pile positioning frame device with auxiliary piles provided by the present invention comprises the following steps: using a vibrating hammer to drive an auxiliary pile on the seabed, and using the vibrating hammer to adjust the verticality of the auxiliary pile during the piling process; then the pile positioning frame is mounted on the auxiliary pile from its middle casing, and in the vertical direction, the pile positioning frame gradually sinks and is supported on the seabed by its own weight, and in the horizontal direction, a plurality of leveling devices arranged along the axial direction of the middle casing are used to adjust the gap between the circumferential and axial parts of the middle casing and the auxiliary piles, so as to achieve precise adjustment of the verticality of the pile positioning frame; then, engineering piles are inserted into the engineering pile casings on the outer periphery of the pile positioning frame, so as to achieve precise control of the relative spacing between multiple engineering piles; the method has the advantages of low construction difficulty and high leveling accuracy of the pile positioning frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 A front view of an underwater pile positioning frame device provided by an embodiment of the present invention;

[0036] Figure 2 A top view of an underwater pile positioning frame device provided in an embodiment of the present invention.

[0037] Explanation of the reference numerals: 1. Intermediate casing; 2. Auxiliary piles; 3. Positioning frame; 31. Horizontal support; 311. Upper frame; 312. Lower frame; 313. Support beam; 32. Diagonal support; 4. Engineering pile casing; 41. Wellhead guide structure; 42. Guide rib plate; 5. Leveling cylinder; 6. Anti-sinking plate; 7. Support truss. DETAILED DESCRIPTION

[0038] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0040] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0042] Embodiment 1

[0043] like Figure 1 and Figure 2 The present invention shows a sleeve type underwater pile positioning frame device with auxiliary piles, comprising an intermediate sleeve 1, a positioning frame 3, an engineering pile sleeve 4 and a leveling device. The intermediate sleeve 1 is an upright hollow cylindrical structure, which is used to be sleeved with the auxiliary pile 2. The positioning frame 3 is square and welded to the outer periphery of the bottom end of the intermediate sleeve 1, and the center of gravity of the positioning frame 3 is located on the axis of the intermediate sleeve 1. There are four engineering pile sleeves 4 and they are respectively located at the four vertices of the positioning frame 3, and the geometric centers of the four engineering pile sleeves 4 are located on the axis of the intermediate sleeve 1; the engineering pile sleeve 4 has a columnar space for inserting engineering piles. The leveling device is arranged in four groups along the axial direction of the intermediate sleeve 1, and each group of the leveling device includes at least four leveling oil cylinders 5 uniformly arranged on the peripheral wall of the intermediate sleeve 1 along the circumference of the auxiliary pile 2; the fixed ends of the at least four leveling oil cylinders 5 are fixed to the intermediate sleeve 1, and the telescopic ends act on the auxiliary pile 2 in the intermediate sleeve 1 to adjust the verticality of the intermediate sleeve 1.

[0044] Compared with the bottom-seat positioning frame 3 in the prior art, this sleeve-type underwater pile positioning frame device with auxiliary piles has a light structure and low requirements on ship machinery and equipment, and can be used for pile construction of the positioning frame 3 foundation at a water depth of more than 35m. First, an upright auxiliary pile 2 is driven, and then the middle casing 1 of the pile positioning frame is mounted on the auxiliary pile 2. The pile positioning frame is supported on the seabed by its own weight in the vertical direction, and the gap between the middle casing 1 and the auxiliary piles 2 at various circumferential locations in the horizontal direction is adjusted by using multiple groups of leveling cylinders 5 arranged radially along the middle casing 1 to adjust the flatness of the positioning frame 3. Then, engineering piles are inserted into the four engineering pile casings 4, so that the spacing between the four engineering piles can be well controlled. It has the advantages of low construction difficulty and high relative position accuracy between the four engineering piles.

[0045] In this embodiment, the positioning frame 3 includes a horizontal support 31 connected between the engineering pile casing 4 and the intermediate casing 1, and a diagonal support 32 diagonally supported between one end of the horizontal support 31 close to the engineering pile casing 4 and the portion of the intermediate casing 1 located on the horizontal support 31. The positioning frame 3 of the frame structure composed of the horizontal support 31 and the diagonal support 32 can reduce the overall deadweight of the entire pile positioning frame while ensuring that the overall strength of the pile positioning frame meets the support requirements.

[0046] Specifically, the horizontal support 31 includes an upper frame 311 and a lower frame 312 which are parallel and horizontally arranged, and a support beam 313 supported between the engineering pile casing 4 and the intermediate casing 1, between the upper frame 311 and the intermediate casing 1, between the lower frame 312 and the intermediate casing 1, and between the upper frame 311 and the lower frame 312. The horizontal support 31 of the frame structure composed of the upper frame 311, the lower frame 312 and the support frame has a lighter structure deadweight than the bottom-seat structure of the underwater pile positioning frame of the solid structure, has lower requirements on the ship machinery and equipment, and reduces the construction cost.

[0047] In this embodiment, an anti-sinking plate 6 is fixed to the lower end surface of the horizontal bracket 31, and the plate surface of the anti-sinking plate 6 covers the lower bottom surface of the horizontal bracket 31. The anti-sinking plate 6 can sink into the bottom of the seabed, thereby ensuring the flatness of the pile positioning frame on the seabed.

[0048] In this embodiment, the outer periphery of the upper end of the middle sleeve 1 is connected with a supporting truss 7. The leveling device includes a leveling device assembly 1, a leveling device assembly 2, a leveling device assembly 3, and a leveling device assembly 4 which are arranged in order from top to bottom along the axis of the middle sleeve 1; the leveling device assembly 1 is located at the connection point between the middle sleeve 1 and the supporting truss 7; the leveling device assembly 2 is located at the connection point between the middle sleeve 1 and the diagonal brace bracket 32; the leveling device assembly 3 is located at the connection point between the middle sleeve 1 and the upper end frame 311; and the leveling device assembly 4 is located at the connection point between the middle sleeve 1 and the lower end frame 312. Four groups of leveling devices are respectively arranged at the connection nodes between the middle sleeve 1 and the supporting truss 7, the connection nodes between the middle sleeve 1 and the diagonal brace bracket 32, the connection nodes between the middle sleeve 1 and the upper end frame 311, and the connection nodes between the middle sleeve 1 and the lower end frame 312. An independent group of leveling devices is arranged at the four main stress points of the middle sleeve 1. The multiple leveling cylinders 5 of each group of leveling devices can adjust the gap between the middle sleeve 1 and the auxiliary piles 2 at various circumferential locations. The four groups of leveling devices cooperate with each other to better realize the leveling of the verticality of the pile positioning frame.

[0049] In this embodiment, the axes of the four engineering pile casings 4 are parallel to the axis of the middle casing 1. A wellhead guide structure 41 is provided at the upper end of the engineering pile casing 4; the wellhead guide structure 41 facilitates the lowering of the engineering pile. A guide rib plate 42 is provided on the outer peripheral wall of the upper end of the engineering pile casing 4 near the wellhead guide structure 41; the provision of the guide rib plate 42 can ensure the verticality requirement of the engineering pile during the lowering process.

[0050] Embodiment 2

[0051] The embodiment of the present invention further provides a construction method of a sleeve-type underwater pile positioning frame device with auxiliary piles, which is used to drive the above sleeve-type underwater pile positioning frame device with auxiliary piles into the bottom of the water, and specifically comprises the following steps:

[0052] Step S10, auxiliary pile sinking operation: using a vibrating hammer to drive the auxiliary pile at a preset position on the bottom of the water, and using the vibrating hammer to adjust the verticality of the auxiliary pile during the piling process;

[0053] Step S20, inserting the pile positioning frame: inserting the pile positioning frame into the auxiliary pile from the middle sleeve thereof, so that the pile positioning frame enters the water bottom along the guide of the auxiliary pile, and the anti-sinking plate 6 at the bottom of the pile positioning frame sinks into the mud surface;

[0054] Step S30, leveling the pile positioning frame: using multiple sets of leveling devices arranged along the axial direction of the intermediate casing to adjust the gap between the intermediate casing and the auxiliary piles at various locations in the axial direction, so that the horizontality of the support truss 7 at the upper end of the intermediate casing is controlled within a set range;

[0055] Step S40, inserting the engineering piles: inserting the engineering piles into the engineering pile casings on the periphery of the pile sinking positioning frame, the guide ribs provided on the engineering pile casings ensure that the engineering piles sink vertically, and the construction is completed when the engineering piles are sunk into place.

[0056] Among them, the pile positioning frame is an auxiliary facility for the construction of engineering piles. After the construction of four engineering piles is completed, the leveling cylinders of multiple sets of leveling devices are loosened, the pile positioning frame is lifted, and the auxiliary piles are pulled out to obtain four engineering piles standing on the seabed. This method of using the pile positioning frame to locate the pile positions of the four engineering piles can accurately control the relative spacing between the four engineering piles.

[0057] The construction method of the underwater pile positioning frame device comprises the following steps: using a vibrating hammer to drive an auxiliary pile 2 on the seabed, and using the vibrating hammer to adjust the verticality of the auxiliary pile 2 during the piling process; then the pile positioning frame is mounted on the auxiliary pile 2 from the middle casing 1 thereof; in the vertical direction, the pile positioning frame gradually sinks and is supported on the seabed by its own weight; in the horizontal direction, a plurality of leveling devices arranged along the axial direction of the middle casing 1 are used to adjust the gap between the middle casing 1 and the auxiliary pile 2 at various circumferential and axial locations, so as to achieve precise adjustment of the verticality of the pile positioning frame; then, engineering piles are inserted into the engineering pile casings 4 on the outer periphery of the pile positioning frame; after the engineering pile construction is completed, the pile positioning frame is hoisted, and the auxiliary pile 2 is pulled out to obtain four engineering piles standing on the seabed; the method has the advantages of low construction difficulty and high relative position accuracy between the four engineering piles.

[0058] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A sleeve-type underwater pile positioning frame device with auxiliary piles, characterized in that: include: The middle casing (1) is an upright hollow cylindrical structure, and is used for sleeve connection with the auxiliary pile (2); A positioning frame (3) connected to the outer periphery of the bottom end of the intermediate sleeve (1), with its center of gravity located on the axis of the intermediate sleeve (1); The engineering pile casings (4) have at least three pieces and are connected to the positioning frame (3); the geometric centers of at least three of the engineering pile casings (4) are located on the axis of the middle casing (1); the engineering pile casings (4) have a columnar space for inserting engineering piles; Four groups of leveling devices are arranged along the axial direction of the intermediate sleeve (1), and each group of the leveling devices comprises a plurality of leveling oil cylinders (5) uniformly arranged on the peripheral wall of the intermediate sleeve (1) along the circumference of the auxiliary pile (2); the fixed ends of the plurality of leveling oil cylinders (5) are fixed to the intermediate sleeve (1), and the telescopic ends act on the auxiliary pile (2) in the intermediate sleeve (1) to adjust the verticality of the intermediate sleeve (1); The positioning frame (3) comprises a horizontal support (31) connected between the engineering pile casing (4) and the intermediate casing (1), and a diagonal support bracket (32) diagonally supported between one end of the horizontal support (31) close to the engineering pile casing (4) and a portion of the intermediate casing (1) located on the horizontal support (31); An anti-sinking plate (6) is fixed to the lower end surface of the horizontal bracket (31), and the plate surface of the anti-sinking plate (6) covers the lower bottom surface of the horizontal bracket (31); The horizontal support (31) comprises an upper frame (311) and a lower frame (312) which are parallel to each other and arranged horizontally, and a support beam (313) supported between the engineering pile casing (4) and the intermediate casing (1), between the upper frame (311) and the intermediate casing (1), between the lower frame (312) and the intermediate casing (1), and between the upper frame (311) and the lower frame (312); The outer periphery of the upper end of the intermediate sleeve (1) is connected to a supporting truss (7); the leveling device comprises a leveling device combination 1, a leveling device combination 2, a leveling device combination 3, and a leveling device combination 4 which are arranged in order from top to bottom along the axis of the intermediate sleeve (1); the leveling device combination 1 is located at the connection point between the intermediate sleeve (1) and the supporting truss (7); the leveling device combination 2 is located at the connection point between the intermediate sleeve (1) and the diagonal support bracket (32); the leveling device combination 3 is located at the connection point between the intermediate sleeve (1) and the upper end frame (311); and the leveling device combination 4 is located at the connection point between the intermediate sleeve (1) and the lower end frame (312).

2. The sleeve-type underwater pile positioning frame device with auxiliary piles according to claim 1 is characterized in that: The axes of at least three engineering pile casings (4) are parallel to the axis of the middle casing (1).

3. The sleeve-type underwater pile positioning frame device with auxiliary piles according to claim 1 is characterized in that: A wellhead guide structure (41) is provided at the upper end of the engineering pile casing (4).

4. The sleeve-type underwater pile positioning frame device with auxiliary piles according to claim 3 is characterized in that: A guide rib plate (42) is provided on the outer peripheral wall of the upper end of the engineering pile casing (4) close to the wellhead guide structure (41).

5. The sleeve-type underwater pile positioning frame device with auxiliary piles according to claim 1, characterized in that: There are four engineering pile casings (4), which are arranged in a square shape, and the middle casing (1) is located at the center of the square formed by the four engineering pile casings (4).

6. A construction method of a sleeve-type underwater pile positioning frame device with auxiliary piles, used to drive the sleeve-type underwater pile positioning frame device with auxiliary piles as claimed in claim 1 into the bottom of the water, characterized in that: The following steps are involved: Step S10, auxiliary pile sinking operation: using a vibrating hammer to drive the auxiliary pile at a preset position on the bottom of the water, and using the vibrating hammer to adjust the verticality of the auxiliary pile during the piling process; Step S20, inserting a pile positioning frame: inserting the pile positioning frame into the auxiliary pile from the middle sleeve thereof, so that the pile positioning frame enters the water bottom along the guide of the auxiliary pile, and the anti-sinking plate at the bottom of the pile positioning frame sinks into the mud surface; Step S30, leveling the pile positioning frame: using multiple sets of leveling devices arranged along the axial direction of the intermediate casing to adjust the gap between the intermediate casing and the auxiliary piles at various locations in the axial direction, so that the horizontality of the supporting truss at the upper end of the intermediate casing is controlled within a set range; Step S40, inserting the engineering piles: inserting the engineering piles into the engineering pile casings on the periphery of the pile sinking positioning frame, the guide ribs provided on the engineering pile casings ensure that the engineering piles sink vertically, and the construction is completed when the engineering piles are sunk into place.

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