Precast concrete composite pile for offshore photovoltaic

Abstract

The utility model provides an offshore photovoltaic precast concrete composite pile, which comprises a pile structure, the pile structure comprises a concrete pile foundation and a steel hoop, the concrete pile foundation is triangular on the vertical projection plane of the composite pile, the concrete pile foundation comprises a concrete pile vertically arranged along the composite pile, and the steel hoop is arranged on the concrete pile. The pile structure further comprises a truss structure, and the steel hoop is connected with the end portion of the truss structure to form a triangular edge portion. According to the prefabricated concrete combined pile, the high-strength prestressed concrete piles are adopted, the steel truss structure is used for connecting the prestressed concrete piles together to form a space truss structure, and the space truss structure serves as an integrally stressed pile foundation structure, so that the combined pile is high in horizontal load bearing capacity and bending moment bearing capacity; and therefore, the pile body material and the work amount are saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to offshore photovoltaic pile technology field, concretely relates to a prefabricated concrete combined pile for offshore photovoltaic. BACKGROUND

[0002] With the reform of energy structure in China, new energy has made great progress. Among them, offshore photovoltaic as a new field of photovoltaic industry has emerged suddenly, and has been widely recognized by the market because of its large planning capacity and vast land.

[0003] The pile of offshore photovoltaic, as the support structure of offshore cable-stayed photovoltaic support, needs to bear the wave force and water flow force much larger than the land structure in addition to the conventional dead weight and wind load, resulting in large load on the pile foundation structure, especially large horizontal force and bending moment. The traditional offshore photovoltaic pile has large cantilever height and horizontal load, so that the bending moment of the pile body near the mud surface is large. Therefore, the prestressed concrete pipe pile or steel pipe pile with cantilever structure is used in the traditional pile foundation, and the bending moment of the pile body near the mud surface is large, the cross section of the pile body is large, and the material consumption is large. SUMMARY

[0004] The purpose of the utility model is to provide a combined pile which can improve the bending resistance and reduce the material consumption. To this end, the utility model adopts the following technical solutions:

[0005] A prefabricated concrete combined pile for offshore photovoltaic, comprising a pile structure, the pile structure comprising a concrete pile foundation and a steel hoop, the concrete pile foundation being triangular on the projection plane of the combined pile in the vertical direction, the concrete pile foundation comprising a concrete pile arranged in the vertical direction of the combined pile to form the end point of the triangle, the pile structure further comprising a truss structure, the steel hoop being connected to the end of the truss structure to form the side of the triangle, so that there is a flow space between adjacent concrete piles; the steel hoop comprises an upper end steel hoop and a lower end steel hoop, the upper end steel hoop being located at the upper end of the concrete pile, the lower end steel hoop being located at the lower end of the concrete pile, the pile structure being arranged in at least two layers in the vertical direction of the combined pile, the lower end steel hoop of the upper layer of the pile structure being fixedly connected to the upper end steel hoop of the lower layer of the pile structure.

[0006] Further, a reinforcing hoop body is arranged at the connection between the upper and lower layers of the concrete pile, one side end of the reinforcing hoop body being connected to the outer surface of the lower end steel hoop, and the other side end of the reinforcing hoop body being connected to the outer surface of the upper end steel hoop.

[0007] Further, the upper end steel hoop comprises an upper end cover located at the upper end surface of the concrete pile, and the lower end steel hoop comprises a lower end cover located at the lower end surface of the concrete pile; the upper end cover is fixedly connected with the lower end cover at the joint of the upper and lower concrete piles.

[0008] Further, the upper end steel hoop further comprises an upper cylindrical hoop body connected with the upper end cover, the upper cylindrical hoop body is sleeved on the outside of the concrete pile; the lower end steel hoop further comprises a lower cylindrical hoop body connected with the lower end cover, the lower cylindrical hoop body is sleeved on the outside of the concrete pile; the truss structure comprises a diagonal rod assembly, the end of the diagonal rod assembly is connected with the upper cylindrical hoop body and the lower cylindrical hoop body of the adjacent side concrete pile respectively.

[0009] Further, the pile body of the concrete pile is provided with an intermediate steel hoop, the intermediate steel hoop is cylindrical, the intermediate steel hoop is located between the upper end steel hoop and the lower end steel hoop; the diagonal rod assembly has a first diagonal rod and a second diagonal rod; the intermediate steel hoop is provided with a first connecting portion connected with the first diagonal rod, and is provided with a second connecting portion connected with the second diagonal rod; the first diagonal rod and the second diagonal rod are shaped on the intermediate steel hoop; the first diagonal rod is further connected with the upper cylindrical hoop body of the adjacent side concrete pile, and the second diagonal rod is further connected with the lower cylindrical hoop body of the adjacent side concrete pile.

[0010] Further, the truss structure comprises a cross rod, the upper cylindrical hoop body of the top layer pile structure is provided with a third connecting portion connected with the end of the cross rod in the vertical direction of the combined pile.

[0011] Further, the cross rod is provided with a turning-over lifting lug, the turning-over lifting lug comprises a stop body and a supporting pipe, the supporting pipe is cylindrical, and the projection area of the outer contour of the supporting pipe is located in the projection area of the outer contour of the stop body in the axial projection plane of the supporting pipe; at least one pair of turning-over lifting lugs is arranged on the cross rod on the opposite side of one of the concrete piles.

[0012] Further, in the vertical projection of the combined pile, the concrete pile foundation is in the shape of an equilateral triangle, the center of the equilateral triangle is defined as o, the supporting pipe comprises an intermediate connecting pipe connected with the cross rods on the opposite sides, the intermediate connecting pipe passes through the center, and the intermediate connecting pipe is arranged along the axial direction of one of the cross rods.

[0013] Further, the top pile structure is provided with a detachable pile hammer connecting structure and a pile hammer, the pile hammer connecting structure comprises a supporting platform plate and a connecting plate, the supporting platform plate is located on the top of the upper end cover, the supporting platform plate is connected with the upper end cover through bolts, the connecting plate is located on the top of the supporting platform plate, and the clamp at the bottom of the pile hammer can be connected with the connecting plate.

[0014] Compared with the prior art, the utility model has the advantages of the following beneficial effects:

[0015] The prefabricated concrete composite pile of the utility model adopts multiple high-strength prestressed concrete piles, connects the multiple prestressed concrete piles together by a steel truss structure, combines into a space truss structure, and serves as a whole stress pile foundation structure, so compared with the bending mode of a traditional cantilever pile, not only can the overall cost of the pile foundation be reduced, but also the main material of the composite pile is in a tension and compression mode, the tension and compression bearing capacity of the pile is large, the composite pile has strong horizontal load bearing capacity and bending moment capacity, and therefore the pile body material and engineering quantity are saved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a front view of the elevation of the prefabricated concrete composite pile of the utility model;

[0017] Figure 2 It is a front view of the elevation of the prefabricated concrete composite pile of the utility model; Figure 1 It is a top view of the composite pile;

[0018] Figure 3 It is a front view of the pile body at the pile end of the utility model; Figure 1 It is a sectional view of the pile body at the pile end of the utility model;

[0019] Figure 4 It is a front view of the pile body at the pile body of the utility model; Figure 1 It is a sectional view of the pile body at the pile body of the utility model;

[0020] Figure 5 It is a front view of the pile body at the pile body of the utility model; Figure 1 It is a sectional view of the pile body at the pile body of the utility model;

[0021] Figure 6 It is a front view of the pile body at the pile body of the utility model; Figure 1 It is a sectional view of the pile body at the pile body of the utility model;

[0022] Figure 7 It is a front view of the pile body at the pile end splicing of the upper and lower pile bodies of the utility model; Figure 1 It is a sectional view of the pile end splicing of the upper and lower pile bodies of the utility model;

[0023] Figure 8 It is a front view of the pile end splicing of the upper and lower pile bodies of the utility model; Figure 1 It is a sectional view of the pile end splicing of the upper and lower pile bodies of the utility model;

[0024] Figure 9 It is a top view of the composite pile top of the utility model; Figure 1 It is a sectional view of the composite pile top of the utility model;

[0025] Figure 10 It is a sectional view of the composite pile top of the utility model;Figure 9 Schematic diagram of the middle turning lifting lug;

[0026] Figure 11 for Figure 1 Schematic diagram of the connection between the top of the medium composite pile and the vibratory hammer;

[0027] Figure 12 This is a schematic diagram of multi-layer composite piles stacked on a transport ship in the present invention;

[0028] Figure 13 for Figure 12 Side view of the . DETAILED DESCRIPTION

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0030] This embodiment uses Figure 1 The axial direction of the concrete pile a is the vertical direction of the composite pile, for explanation.

[0031] like Figures 1-10 As shown, a prefabricated concrete composite pile for offshore photovoltaics includes a pile structure 1, which includes a concrete pile foundation 11 and a steel hoop. The concrete pile foundation 11 is triangular in shape on the vertical projection surface of the composite pile. The concrete pile foundation 11 includes concrete piles a arranged vertically along the composite pile to form triangular end points. The pile structure 1 also includes a truss structure 13. The steel hoop is connected to the end of the truss structure 13 to form a triangular side, so that there is a flow space between adjacent concrete piles a. Compared with traditional offshore photovoltaic piles, the pile body of the concrete pile a is reduced. The contact surface and contact area of ​​the mud surface attachment make the composite pile have a strong ability to withstand horizontal loads and bending moments; the steel hoop includes an end steel hoop 12, and the end steel hoop 12 has an upper end steel hoop 121 and a lower end steel hoop 122. The upper end steel hoop 121 is located at the upper end of the concrete pile a, and the lower end steel hoop 122 is located at the lower end of the concrete pile a. The pile structure 1 is vertically arranged in at least two layers of the composite pile, and the lower end steel hoop 122 of the upper pile structure 1 is fixedly connected to the upper end steel hoop 121 of the lower pile structure 1 to form a whole, which is convenient for completing the construction in one go.

[0032] Based on the above, pile structure 1 is triangular prism-shaped and comprises a first pile body 111, a second pile body 112, and a third pile body 113. First pile body 111, second pile body 112, and third pile body 113 are each one of the plurality of concrete piles a. Accordingly, to ensure that the height of the composite pile meets the actual elevation requirements, multiple layers of pile structures 1 can be assembled. This reduces the difficulty of fabricating a single concrete pile a compared to directly fabricating the concrete pile a to meet the actual elevation requirements.

[0033] Meanwhile, the material of the truss structure 13 is steel, and the first pile body 111, the second pile body 112, and the third pile body 113 are connected together by the truss structure 13 to form a space truss structure. Compared with the traditional structure using steel pipe piles, the concrete pile of the embodiment has high pile body strength, less material, and low cost, and has good economy. Moreover, the combined pile changes the stress characteristics of the traditional cantilever pile, and the combined pile is jointly stressed by the space truss structure. Compared with the bending mode of the traditional cantilever pile, the main material of the combined pile is in tension and compression mode, and the tension and compression bearing capacity of the pile is large, so the combined pile has stronger horizontal load and bending moment capacity. If the multi-pile pile foundation is a non-integral structure as described above, each pile needs to be sunk one by one, and after each pile is sunk, the ship needs to be moved and repositioned. The auxiliary positioning measures between the piles are complex and the auxiliary positioning tooling cost is high due to the high precision control requirement, which leads to a long construction period and high cost of the traditional multi-pile foundation.

[0034] In the embodiment, the concrete pile a is connected and fixed with the upper and lower pile structures 1 by the end steel hoops 12 fixedly connected thereto. Specifically, the upper end steel hoop 121 includes an upper end cover 1212 located at the upper end surface of the concrete pile a, and the lower end steel hoop 122 includes a lower end cover 1222 located at the lower end surface of the concrete pile a. The upper end cover 1212 and the lower end cover 1222 are fixedly connected at the connection between the upper and lower concrete piles a to ensure the connection strength of the concrete piles a of the upper and lower pile structures 1.

[0035] In the embodiment, the connection between the concrete piles a of the upper and lower pile structures 1 is welded and fixed by the end steel hoops 12, and a reinforcing hoop body 15 is arranged at the connection between the upper and lower concrete piles a. One side end of the reinforcing hoop body 15 is connected to the outer surface of the lower end steel hoop 122, and the other side end of the reinforcing hoop body 15 is connected to the outer surface of the upper end steel hoop 121 to further improve the connection strength of the concrete piles a of the upper and lower pile structures 1 and ensure the overall stability of the combined pile.

[0036] In the embodiment, the upper end steel hoop 121 further includes an upper cylindrical hoop body 1211 connected to the upper end cover 1212, and the upper cylindrical hoop body 1211 is sleeved on the outside of the concrete pile a. The lower end steel hoop 122 further includes a lower cylindrical hoop body 1221 connected to the lower end cover 1222, and the lower cylindrical hoop body 1221 is sleeved on the outside of the concrete pile a. The truss structure 13 includes a diagonal rod assembly, and the ends of the diagonal rod assembly are connected to the upper cylindrical hoop body 1211 and the lower cylindrical hoop body 1221 of the adjacent side concrete pile a, respectively. In this way, the adjacent side concrete piles a of the pile structure 1 can be quickly and effectively connected, and the connection strength at the connection with the diagonal rod assembly is ensured.

[0037] Wherein, the pile body of the concrete pile a is provided with an intermediate hoop 14, the intermediate hoop 14 is a cylinder, the intermediate hoop 14 is located between the upper end hoop 121 and the lower end hoop 122, the inclined rod assembly has a first inclined rod 132 and a second inclined rod 133, the intermediate hoop 14 is provided with a first connecting part connected with the first inclined rod 132, the intermediate hoop 14 is also provided with a second connecting part connected with the second inclined rod 133, the first inclined rod 132 and the second inclined rod 133 are V-shaped on the intermediate hoop 14 (in Figure 5 the perspective view), the first inclined rod 132 is also connected with the upper cylindrical hoop body 1211 of the adjacent concrete pile a, and the second inclined rod 133 is also connected with the lower cylindrical hoop body 1221 of the adjacent concrete pile a.

[0038] Based on the above content as Figure 1 indicated in the description, a connecting space is formed between the adjacent concrete piles a, the number of the first inclined rods 132 is two, the middle pipe sections of the two first inclined rods 132 are cross arranged, the number of the second inclined rods 133 is two, the middle pipe sections of the two second inclined rods 133 are cross arranged, and there is a spacing between the first inclined rods 132 and the second inclined rods 133, in the axial direction of the concrete pile a, the distance between the first connecting part and the second connecting part is the minimum spacing of the spacing. Therefore, the inclined rod assembly is fixed on the end hoop 12 and the intermediate hoop 14 through connection, so as to ensure the connection strength with the concrete pile a, thereby guaranteeing the overall strength of the pile structure 1 and the stability of the pile structure 1.

[0039] Of course, when the number of the intermediate hoops 14 on the same concrete pile a is at least two, a third inclined rod (not shown in the figure) can be arranged, when the number of the third inclined rods is two, the middle pipe sections of the two third inclined rods can also be cross arranged, in the range of the connecting space, one end of the third inclined rod is connected with the upper intermediate hoop 14 of one of the concrete piles a, and the other end of the third inclined rod is connected with the lower intermediate hoop 14 of the other concrete pile a, so as to strengthen the overall stability of the pile structure 1.

[0040] In this embodiment, the first inclined rod 132 and the second inclined rod 133 adopt a circular steel pipe, so as to reduce the construction difficulty when the pile is sunk. Meanwhile, in order to make the combined pile sinking more smoothly, the bottom of the lower end hoop 122 of the concrete pile a of the bottom pile structure 1 can be provided with a pile tip (not shown in the figure), so as to reduce the sinking difficulty.

[0041] Based on the above content, it needs to be explained that the end hoop 12 and the intermediate hoop 14 are connected with the main reinforcement in the pile when the pile body is made, so the reliability of the connection between the truss structure 13 and the prestressed concrete pile can be guaranteed.

[0042] In this embodiment, the truss structure 13 includes a crossbar 131, and the upper tubular hoop body 1211 of the top pile structure 1 is provided with a third connecting portion which is connected to the end of the crossbar 131 in the vertical direction of the composite pile. The crossbar 131 can strengthen the connection stability of the top end of the top pile structure 1, and the crossbar 131 can strengthen the connection strength with the concrete pile a by being fixed to the upper tubular hoop body 1211. Meanwhile, the stability of the pile structure 1 during the installation of the pile hammer 5 on the top pile structure 1 during offshore construction can be ensured.

[0043] In this embodiment, the crossbar 131 is provided with a turning-up lifting lug 2, and the turning-up lifting lug 2 includes a stop body 21 and a supporting tube 22. The supporting tube 22 is in a tubular shape, and the projection of the outer contour of the supporting tube 22 on the axial projection plane of the supporting tube 22 is located within the projection of the outer contour of the stop body 21. The stop body 21 is connected to the end of the supporting tube 22 which is away from the crossbar 131. At least one pair of turning-up lifting lugs 2 is arranged on the crossbar 131 on the opposite sides of one of the concrete piles a, so that the lifting is not stressed on one side during lifting, and the lifting is smooth during the lifting of the composite pile.

[0044] The tubular supporting tube 22 can be matched with a lifting rope, and the lifting rope only needs to be sleeved on the supporting tube 22, without the need for hooks and pins. The stop body 21 can prevent the lifting rope from being separated from the supporting tube 22.

[0045] In the vertical projection of the composite pile, the concrete pile foundation 11 is in a regular triangle shape, and the center of the regular triangle shape is defined as o. The supporting tube 22 includes a middle connecting pipe 221 which is connected to the crossbars 131 on the opposite sides. The middle connecting pipe 221 passes through the center, and the middle connecting pipe 221 is arranged along the axial direction of one of the crossbars 131. This can reduce or prevent the deviation of the center of gravity during the lifting of the composite pile, and ensure the smooth lifting.

[0046] It should be noted that the turning-up lifting lug 2 is arranged horizontally before lifting, and the lifting rope can be hung on the supporting tube 22 conveniently. After lifting, the lifting rope can rotate freely on the outer surface of the supporting tube 22. The composite pile is originally arranged horizontally, and under the lifting action of the lifting equipment, the composite pile can be changed from the original horizontal arrangement to the vertical state shown in FIG. 8 under the action of gravity. Figure 1 Similarly, after the composite pile is lifted to the designated position (such as a deck), when the lower end steel hoop 122 of the bottom pile structure 1 contacts the deck, the composite pile can automatically adapt and adjust the angle until it is horizontal with the deck under the cooperation of the lifting equipment. The unhooking of the lifting rope from the turning-up lifting lug 2 is also convenient, and only the lifting rope needs to be loosened, without the need for a person to unhook, so that the lifting process is fast and convenient.

[0047] In this embodiment, for the problem of sinking the pile of the combined pile, a temporary pile hammer connecting tool and the connecting structure of the tool and the pile hammer are arranged on the top of the prestressed concrete pile. Specifically, the top layer pile structure 1 is provided with a detachable pile hammer connecting structure 4 and a pile hammer 5. The pile hammer connecting structure 4 includes a supporting platform plate 41 and a connecting plate 42. The supporting platform plate 41 is located on the top of the upper end cover 1212, and the supporting platform plate 41 is connected with the upper end cover 1212 through a bolt 43. The connecting plate 42 is located on the top of the supporting platform plate 41. The clamp 51 at the bottom of the pile hammer 5 can be connected with the connecting plate 42. In this way, the pile hammer 5 can be reliably and conveniently fixed on the top of the concrete pile a. Meanwhile, a plurality of pile hammers 5 are connected in parallel to sink the combined pile to the required elevation.

[0048] It should be noted that, for the problem of offshore transportation of the combined pile, the combined pile is transported in a multi-layer stacking transportation mode, so that the multi-layer combined piles are stacked in a pyramid shape on the transport ship 6 for transportation. The combined piles in each layer are separated by a separation pad 7. The bottom of the separation pad 7 abuts against the end hoop 12 and / or the intermediate hoop 14 of the lower combined pile, and the top of the separation pad 7 abuts against the end hoop 12 and / or the intermediate hoop 14 of the upper combined pile, so as to ensure the stability when placed on the transport ship 6. In this embodiment, the separation pad 7 can be a sleeper.

[0049] Please refer to Figures 1-13 When the combined pile is constructed, the specific steps are as follows:

[0050] S1: The components of the pile structure 1 are machined, welded and combined into an integral combined pile on land;

[0051] S2: Transportation of the combined pile: the hoisting rope of the hoisting equipment is hung on the turning ear 2 of the combined pile, the combined pile is lifted until it is hoisted onto the transport ship 5, the combined pile is laid flat on the deck of the transport ship 5, the hoisting rope is loosened after the hoisting is completed, and the hoisting rope is unhooked from the turning ear 2;

[0052] S3: Repeat the step S2 until the deck of the transport ship 5 is full of combined piles, then place the separation pad 7 on the upper part of the lower combined pile, the bottom of the separation pad 7 abuts against the end hoop 12 and / or the intermediate hoop 14, the separation pad 7 forms an upper placement platform, and the step S2 is continued to be repeated to hoist the combined pile onto the separation pad 7 until the transport ship 5 is fully loaded;

[0053] S4: The transport ship 5 transports the combined pile to the construction sea area;

[0054] S5: Installation of the pile hammer connecting structure 4: the supporting platform plate 41 is connected with the upper end cover 1212 of the top layer pile structure 1, and is fixed by the bolt 43;

[0055] S6: The hoisting rope of the hoisting equipment is hung on the turning ear 2 of the combined pile, the combined pile is lifted, the combined pile is lifted to the installation position, and the combined pile is preliminarily sunk under the action of its own weight.

[0056] S7: The pile hammer 5 is clamped on the connecting plate 42 by the clamp 51, the pile hammer 5 is fixed on the pile top of the concrete pile a, the multiple pile hammers 5 of the combined pile are connected in parallel, and the combined pile is sunk to the required elevation;

[0057] S8: Repeat S1-S7 to install the combined pile structure at other positions of the target construction sea area.

[0058] The above embodiment is only a relatively optimal technical solution of the present application, and those skilled in the art should understand that the technical solutions or parameters in the embodiment can be modified or replaced without departing from the principles and essence of the present application, and all should be covered within the protection scope of the present application.

Claims

1. A precast concrete composite pile for offshore photovoltaics, characterized by: The pile structure (1) comprises a concrete pile foundation (11) and a steel hoop, the concrete pile foundation (11) is triangular on the projection plane of the vertical direction of the composite pile, the concrete pile foundation (11) comprises concrete piles (a) arranged along the vertical direction of the composite pile, forming the end points of the triangle, and the steel hoop is connected with the end of the truss structure (13), forming the side of the triangle. The steel hoop comprises an end steel hoop (12) having an upper end steel hoop (121) and a lower end steel hoop (122), the upper end steel hoop (121) is located at the upper end of the concrete pile (a), and the lower end steel hoop (122) is located at the lower end of the concrete pile (a), the pile structure (1) is arranged in at least two layers in the vertical direction of the composite pile, and the lower end steel hoop (122) of the upper layer of the pile structure (1) is fixedly connected with the upper end steel hoop (121) of the lower layer of the pile structure (1).

2. The precast concrete composite pile for offshore photovoltaics according to claim 1, characterized in that: The connection between the upper and lower layers of the concrete piles (a) is provided with a reinforcing hoop body (15), one side end of the reinforcing hoop body (15) is connected with the outer surface of the lower end steel hoop (122), and the other side end of the reinforcing hoop body (15) is connected with the outer surface of the upper end steel hoop (121).

3. A precast concrete composite pile for offshore photovoltaics according to claim 1 or 2, characterized in that: The upper end steel hoop (121) comprises an upper end cover (1212) located at the upper end surface of the concrete pile (a), and the lower end steel hoop (122) comprises a lower end cover (1222) located at the lower end surface of the concrete pile (a), the upper end cover (1212) and the lower end cover (1222) are fixedly connected at the connection between the upper and lower layers of the concrete piles (a).

4. A precast concrete composite pile for offshore photovoltaics according to claim 3, characterized in that: The upper end steel hoop (121) further comprises an upper cylindrical hoop body (1211) connected with the upper end cover (1212), the upper cylindrical hoop body (1211) is sleeved outside the concrete pile (a), the lower end steel hoop (122) further comprises a lower cylindrical hoop body (1221) connected with the lower end cover (1222), the lower cylindrical hoop body (1221) is sleeved outside the concrete pile (a), and the truss structure (13) comprises a diagonal rod assembly, ends of the diagonal rod assembly are connected with the upper cylindrical hoop body (1211) and the lower cylindrical hoop body (1221) of the adjacent side concrete pile (a) respectively.

5. A precast concrete composite pile for offshore photovoltaics according to claim 4, characterized in that: The pile body of the concrete pile (a) is provided with an intermediate steel hoop (14), the intermediate steel hoop (14) is cylindrical, the intermediate steel hoop (14) is located between the upper end steel hoop (121) and the lower end steel hoop (122), the diagonal rod assembly has a first diagonal rod (132) and a second diagonal rod (133), the intermediate steel hoop (14) is provided with a first connecting portion connected with the first diagonal rod (132), the intermediate steel hoop (14) is also provided with a second connecting portion connected with the second diagonal rod (133), the first diagonal rod (132) and the second diagonal rod (133) are V-shaped on the intermediate steel hoop (14), the first diagonal rod (132) is also connected to the adjacent upper cylindrical hoop body (1211) of the concrete pile (a), and the second diagonal rod (133) is also connected to the adjacent lower cylindrical hoop body (1221) of the concrete pile (a).

6. A precast concrete composite pile for offshore photovoltaics according to claim 4, characterized in that: The truss structure (13) includes a cross bar (131), and in the vertical direction of the combined pile, the upper cylindrical hoop body (1211) of the top layer of the pile structure (1) is provided with a third connecting portion connected with the end of the cross bar (131).

7. A precast concrete composite pile for offshore photovoltaics according to claim 6, characterized in that: The cross bar (131) is provided with a turnover lifting lug (2), the turnover lifting lug (2) includes a stop body (21) and a supporting pipe (22), the supporting pipe (22) is cylindrical, and in the projection plane of the supporting pipe (22) in the axial direction, the projection plane of the outer contour of the supporting pipe (22) is located in the projection plane of the outer contour of the stop body (21); At least one pair of turnover lifting lugs (2) are provided, and the turnover lifting lugs (2) are respectively arranged on the cross bars (131) on the opposite sides of one of the concrete piles (a) as a reference.

8. A precast concrete composite pile for offshore photovoltaics according to claim 7, characterized in that: In the projection of the combined pile in the vertical direction, the concrete pile foundation (11) is a regular triangle, the center of the regular triangle is defined as o, the supporting pipe (22) includes an intermediate connecting pipe (221) connected with the cross bars (131) on the opposite sides, the intermediate connecting pipe (221) passes through the center, and the intermediate connecting pipe (221) is arranged in the axial direction of one of the cross bars (131).

9. A precast concrete composite pile for offshore photovoltaics according to claim 3, characterized in that: The top layer of the pile structure (1) is provided with a detachable pile hammer connecting structure (4) and a pile hammer (5), the pile hammer connecting structure (4) includes a supporting platform plate (41) and a connecting plate (42), the supporting platform plate (41) is located on the top of the upper end cover (1212), the supporting platform plate (41) is connected with the upper end cover (1212) through a bolt (43), the connecting plate (42) is located on the top of the supporting platform plate (41), and the clamp (51) at the bottom of the pile hammer (5) can be connected with the connecting plate (42).

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