Photovoltaic prefabricated pipe pile bearing capacity enhancing structure and construction method thereof

Abstract

The invention discloses a photovoltaic prefabricated pipe pile bearing capacity enhancing structure and a construction method thereof, and belongs to the technical field of photovoltaic power generation pile foundations. The structure comprises a prefabricated pipe pile and a bearing capacity enhancing mechanism, and the bearing capacity enhancing mechanism is arranged at the lower end of the prefabricated pipe pile and partially extends into the prefabricated pipe pile. On the basis that the original structure of the prefabricated pipe pile is not changed, a bearing capacity enhancing mechanism is additionally arranged at the lower end of the prefabricated pipe pile, so that the bearing capacity of the prefabricated pipe pile is improved through the bearing capacity enhancing mechanism, the strength and rigidity of the prefabricated pipe pile are ensured, the structure of the prefabricated pipe pile can be prevented from being complicated, and the manufacturing cost of the prefabricated pipe pile can be reduced; the construction process is simplified, and the construction efficiency is improved.

Description

Technical Field

[0001] The invention relates to a photovoltaic prefabricated pipe pile bearing capacity enhancement structure and a construction method thereof, belonging to the technical field of photovoltaic power generation pile foundations. Background Art

[0002] In recent years, with the vigorous development of photovoltaic construction, the application of PHC prefabricated pipe piles as the foundation of photovoltaic brackets has become more and more widespread, especially in the construction of teahouse complementary, agricultural photovoltaic complementary, fishery photovoltaic complementary and other projects. However, during the construction of these projects, there are local geology is poor, resulting in insufficient bearing capacity of PHC prefabricated pipe piles. If cast-in-place concrete, surface reinforcement, replacement foundation and other methods are used to improve its bearing capacity, it will not only cause a large-scale increase in costs, but also cause delays in construction period.

[0003] The Chinese patent document with the publication number CN114517473A discloses a prefabricated pipe pile and a construction method thereof which is applicable to soft soil layers and can effectively enhance the bearing capacity. The prefabricated pipe pile includes a pile cap, a prefabricated pipe pile and a pile tip. The side surface of the prefabricated pipe pile is provided with a plurality of rows of through grooves along the axial direction of the pile body, and the through grooves penetrate the wall of the prefabricated pipe pile; each of the grooves is provided with a soil squeezing unit, and one end of the soil squeezing unit located inside the prefabricated pipe pile is provided with an oblique section, and multiple soil squeezing units in the same row are connected by a connecting structure that can be separated by external force; a hanging object is arranged at the bottom end inside the prefabricated pipe pile, and a steel wire rope is connected to the hanging object at one end and connected to a barb on the pile cap at the other end; when the steel wire rope pulls the hanging object to move upward inside the prefabricated pipe pile, the top end of the hanging object can pierce the connecting mechanism and squeeze the soil squeezing unit into the soil outside the prefabricated pipe pile. The vertical bearing capacity and pull-out resistance of the prefabricated pipe pile are increased under the premise of constant pile diameter and pile length.

[0004] However, the prefabricated pipe pile is provided with a plurality of through grooves for installing the soil squeezing unit in the radial direction, which easily cause stress concentration, resulting in a decrease in the strength and rigidity of the prefabricated pipe pile. At the same time, due to the change in the original structure of the prefabricated pipe pile, it has the disadvantages of complex structure, high manufacturing cost, cumbersome construction process and low construction efficiency. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a photovoltaic prefabricated pipe pile bearing capacity enhancement structure and a construction method thereof.

[0006] The present invention is achieved through the following technical solutions:

[0007] A photovoltaic prefabricated pipe pile bearing capacity enhancement structure comprises a prefabricated pipe pile and a bearing capacity enhancement mechanism, wherein the bearing capacity enhancement mechanism is arranged at the lower end of the prefabricated pipe pile and partially extends into the interior of the prefabricated pipe pile.

[0008] The prefabricated pipe piles are PHC piles.

[0009] The bearing capacity enhancement mechanism comprises a bottom plate and a reinforcement plate. The reinforcement plate is arranged on the bottom plate. A plurality of reinforcement frames are arranged on the bottom plate, and all the reinforcement frames are connected to the reinforcement plate.

[0010] The bottom plate is circular, and the diameter of the bottom plate is consistent with the outer diameter of the prefabricated pipe pile;

[0011] The reinforcing plate is circular, and both the reinforcing plate and the bottom plate are made of steel plates.

[0012] Three or more reinforcing frames are arranged on the bottom plate, and all the reinforcing frames are arranged in a circular array.

[0013] The reinforcement frame includes a vertical rod and an oblique rod. The vertical rod is arranged along the axial direction of the prefabricated pipe pile, one end of which is fixedly connected to the bottom plate, and the vertical rod is tangent to the inner wall of the prefabricated pipe pile. One end of the oblique rod is fixedly connected to an end of the vertical rod away from the bottom plate, and the other end is fixedly connected to the reinforcement plate.

[0014] The angle between the oblique rod and the vertical rod is 30° to 60°.

[0015] The length of the vertical rod is not less than the inner diameter of the prefabricated pipe pile.

[0016] The vertical rods and diagonal rods are made of threaded steel bars or plain round steel bars, and the diameter of the vertical rods is not less than 12 mm, and the diameter of the diagonal rods is not less than 14 mm.

[0017] A construction method for a photovoltaic prefabricated pipe pile bearing capacity enhancement structure comprises the following steps:

[0018] Step 1: Measure the outer diameter D and inner diameter d of the prefabricated pipe pile, and mark the positioning lines of the outer diameter D and inner diameter d on the steel plate respectively;

[0019] Step 2: Cut the steel plate along the positioning line of the outer diameter D to obtain the bottom plate;

[0020] Step 3: Draw the bisectors of the positioning line of the inner diameter d on the bottom plate according to the number of reinforcement frames;

[0021] Step 4: Weld the vertical rod at the intersection of the bisector and the positioning line of the inner diameter d, and ensure that the outer circle of the vertical rod is tangent to the positioning line of the inner diameter d;

[0022] Step 5: Coaxially weld the reinforcement plate to the bottom plate;

[0023] Step 6: Weld the diagonal rod, connect the upper end of the diagonal rod to the upper end of the vertical rod, and connect the lower end of the diagonal rod to the reinforcing plate to obtain a bearing capacity enhancement mechanism;

[0024] Step 7: insert the prepared bearing capacity enhancement mechanism into the lower end of the prefabricated pipe pile;

[0025] Step 8: hoist the prefabricated pipe pile together with the bearing capacity enhancement mechanism to the designated pile position;

[0026] Step 9. Use a pipe sinker or a static pile driver to press the precast pipe piles to the designed elevation. At this time, the precast pipe piles press the bottom plate to ensure the stability of the bearing capacity enhancement mechanism, and the reinforcement frame in the bearing capacity enhancement mechanism supports or limits the precast pipe piles, thereby improving the bearing capacity of the precast pipe piles.

[0027] The beneficial effects of the present invention are:

[0028] 1. On the basis of not changing the original structure of the prefabricated pipe pile, a bearing capacity enhancement mechanism is added at the lower end of the prefabricated pipe pile to improve the bearing capacity of the prefabricated pipe pile through the bearing capacity enhancement mechanism, which not only ensures the strength and rigidity of the prefabricated pipe pile, but also avoids complicating the structure of the prefabricated pipe pile, which helps to reduce the manufacturing cost of the prefabricated pipe pile, simplify its construction process and improve its construction efficiency.

[0029] 2. The setting of vertical rods can prevent the bearing capacity enhancement mechanism from moving or misaligning relative to the precast pipe piles. The setting of diagonal rods and reinforcing plates makes the structure more reasonably stressed and prevents stress concentration in the center of the bottom plate caused by the injection of precast pipe piles.

[0030] 3. The bearing capacity enhancement mechanism is made of "steel plate + steel bar", which can be made using scrap steel plates and steel bars at the construction site. It is flexible to make and has low production cost and strong operability. It can replace other reinforcement structures and has a more obvious effect in enhancing the bearing capacity of prefabricated pipe piles.

[0031] 4. The bearing capacity enhancement mechanism can increase the contact area between the prefabricated pipe piles and the stratum, thereby improving the bearing capacity of the prefabricated pipe piles. It can be widely used as the support foundation for photovoltaic projects in the northern plains of my country, effectively improving the safety of photovoltaic installations.

[0032] 5. The bearing capacity enhancement mechanism has a low production cost, which can not only solve the problem of poor local geology, but also improve the bearing capacity of PHC prefabricated pipe piles without affecting the construction period. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram of the present invention;

[0034] Figure 2 It is a structural schematic diagram of the bearing capacity enhancement mechanism of the present invention;

[0035] Figure 3 It is a step diagram of the construction method of the present invention.

[0036] In the figure: 1-prefabricated pipe piles, 2-bottom plate, 3-reinforcement plate, 4-vertical rods, 5-diagonal rods. DETAILED DESCRIPTION

[0037] The technical solution of the present invention is further described below, but the scope of protection claimed is not limited to the description.

[0038] like Figures 1 to 3 As shown, a photovoltaic prefabricated pipe pile bearing capacity enhancement structure of the present invention comprises a prefabricated pipe pile 1 and a bearing capacity enhancement mechanism, wherein the bearing capacity enhancement mechanism is arranged at the lower end of the prefabricated pipe pile 1 and partially extends into the interior of the prefabricated pipe pile 1. On the basis of not changing the original structure of the prefabricated pipe pile 1, a bearing capacity enhancement mechanism is added to the lower end of the prefabricated pipe pile 1 to improve the bearing capacity of the prefabricated pipe pile 1 through the bearing capacity enhancement mechanism, which not only ensures the strength and rigidity of the prefabricated pipe pile 1, but also avoids complicating the structure of the prefabricated pipe pile 1, which helps to reduce the manufacturing cost of the prefabricated pipe pile 1, simplify its construction process, and improve its construction efficiency.

[0039] The prefabricated pipe pile 1 is a PHC pile.

[0040] The bearing capacity enhancement mechanism comprises a bottom plate 2 and a reinforcement plate 3 . The reinforcement plate 3 is arranged on the bottom plate 2 . A plurality of reinforcement frames are arranged on the bottom plate 2 , and all the reinforcement frames are connected to the reinforcement plate 3 .

[0041] The bottom plate 2 is circular, and the diameter of the bottom plate 2 is consistent with the outer diameter of the prefabricated pipe pile 1;

[0042] The reinforcing plate 3 is circular, and both the reinforcing plate 3 and the bottom plate 2 are made of steel plates. The bottom plate 2 can be made of waste materials at the construction site.

[0043] The bottom plate 2 is provided with three or more reinforcement frames, and all the reinforcement frames are arranged in a circumferential array, so as to ensure that the bearing capacity enhancement mechanism has good strength, so that it can provide good support for the prefabricated pipe pile 1, thereby achieving the purpose of improving the bearing capacity of the prefabricated pipe pile 1.

[0044] The reinforcing frame includes a vertical rod 4 and an oblique rod 5. The vertical rod 4 is arranged along the axial direction of the prefabricated pipe pile 1, one end of which is fixedly connected to the bottom plate 2, and the vertical rod 4 is tangent to the inner wall of the prefabricated pipe pile 1. One end of the oblique rod 5 is fixedly connected to the end of the vertical rod 4 away from the bottom plate 2, and the other end is fixedly connected to the reinforcing plate 3. The setting of the vertical rod 4 can prevent the bearing capacity enhancement mechanism from moving or misaligning relative to the prefabricated pipe pile 1. The setting of the oblique rod 5 and the reinforcing plate 3 makes the structure more reasonably stressed, and prevents the prefabricated pipe pile 1 from causing stress concentration at the center of the bottom plate 2. The vertical rod 4, the oblique rod 5, the reinforcing plate 3 and the bottom plate 2 form a triangular structure, ensuring that the reinforcing frame can well support the prefabricated pipe pile 1.

[0045] The angle between the oblique rod 5 and the vertical rod 4 is 30° to 60°, ensuring that the reinforcement frame has good strength and rigidity.

[0046] The length of the vertical rod 4 is not less than the inner diameter of the prefabricated pipe pile 1 .

[0047] The vertical rod 4 and the diagonal rod 5 are made of threaded steel bars or plain round steel bars, and the diameter of the vertical rod 4 is not less than 12 mm, and the diameter of the diagonal rod 5 is not less than 14 mm.

[0048] A construction method for a photovoltaic prefabricated pipe pile bearing capacity enhancement structure comprises the following steps:

[0049] Step 1: Measure the outer diameter D and inner diameter d of the prefabricated pipe pile 1, and mark the positioning lines of the outer diameter D and inner diameter d on the steel plate respectively;

[0050] Step 2: Cut the steel plate along the positioning line of the outer diameter D to obtain the bottom plate 2;

[0051] Step 3: Draw the bisectors of the positioning lines of the inner diameter d on the bottom plate 2 according to the number of reinforcing frames;

[0052] Step 4: Weld the vertical rod 4 at the intersection of the bisector and the positioning line of the inner diameter d, and ensure that the outer circle of the vertical rod 4 is tangent to the positioning line of the inner diameter d;

[0053] Step 5: coaxially weld the reinforcing plate 3 to the bottom plate 2;

[0054] Step 6: Weld the diagonal rod 5, the upper end of the diagonal rod 5 is connected to the upper end of the vertical rod 4, and the lower end of the diagonal rod 5 is connected to the reinforcing plate 3 to obtain a bearing capacity enhancement mechanism;

[0055] Step 7: insert the prepared bearing capacity enhancement mechanism into the lower end of the prefabricated pipe pile 1;

[0056] Step 8: hoist the prefabricated pipe pile 1 together with the bearing capacity enhancement mechanism to the designated pile position;

[0057] Step nine: Use a pipe sinker or a static pile driver to press the prefabricated pipe pile 1 to the designed elevation. At this time, the prefabricated pipe pile 1 presses the bottom plate 2 to ensure the stability of the bearing capacity enhancement mechanism, and the reinforcement frame in the bearing capacity enhancement mechanism supports or limits the prefabricated pipe pile 1, thereby improving the bearing capacity of the prefabricated pipe pile 1.

[0058] Specifically, there should be no residue, slag inclusions, etc. at the welding point.

Claims

1. A photovoltaic prefabricated pipe pile bearing capacity enhancement structure, characterized in that: It comprises a prefabricated pipe pile (1) and a bearing capacity enhancement mechanism, wherein the bearing capacity enhancement mechanism is arranged at the lower end of the prefabricated pipe pile (1) and partially extends into the interior of the prefabricated pipe pile (1).

2. The photovoltaic prefabricated pipe pile bearing capacity enhancement structure according to claim 1, characterized in that: The prefabricated pipe pile (1) is a PHC pile.

3. The photovoltaic prefabricated pipe pile bearing capacity enhancement structure according to claim 1, characterized in that: The bearing capacity enhancement mechanism comprises a bottom plate (2) and a reinforcement plate (3), wherein the reinforcement plate (3) is arranged on the bottom plate (2), and a plurality of reinforcement frames are arranged on the bottom plate (2), and all the reinforcement frames are connected to the reinforcement plate (3).

4. The photovoltaic prefabricated pipe pile bearing capacity enhancement structure according to claim 3, characterized in that: The bottom plate (2) is circular, and the diameter of the bottom plate (2) is consistent with the outer diameter of the prefabricated pipe pile (1); The reinforcing plate (3) is circular, and both the reinforcing plate (3) and the bottom plate (2) are made of steel plates.

5. The photovoltaic prefabricated pipe pile bearing capacity enhancement structure according to claim 3, characterized in that: The bottom plate (2) is provided with three or more reinforcing frames, and all the reinforcing frames are arranged in a circular array.

6. The photovoltaic prefabricated pipe pile bearing capacity enhancement structure according to claim 3, characterized in that: The reinforcing frame comprises a vertical rod (4) and an oblique rod (5); the vertical rod (4) is arranged along the axial direction of the prefabricated pipe pile (1), one end of which is fixedly connected to the bottom plate (2), and the vertical rod (4) is tangent to the inner wall of the prefabricated pipe pile (1); one end of the oblique rod (5) is fixedly connected to an end of the vertical rod (4) away from the bottom plate (2), and the other end is fixedly connected to the reinforcing plate (3).

7. The photovoltaic prefabricated pipe pile bearing capacity enhancement structure according to claim 6, characterized in that: The angle between the oblique rod (5) and the vertical rod (4) is 30° to 60°.

8. The photovoltaic prefabricated pipe pile bearing capacity enhancement structure according to claim 6, characterized in that: The length of the vertical rod (4) is not less than the inner diameter of the prefabricated pipe pile (1).

9. The photovoltaic prefabricated pipe pile bearing capacity enhancement structure according to claim 6, characterized in that: The vertical rod (4) and the diagonal rod (5) are made of threaded steel bars or plain round steel bars, and the diameter of the vertical rod (4) is not less than 12 mm, and the diameter of the diagonal rod (5) is not less than 14 mm.

10. A construction method for the photovoltaic prefabricated pipe pile bearing capacity enhancement structure according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: measuring the outer diameter D and inner diameter d of the prefabricated pipe pile (1), and marking the positioning lines of the outer diameter D and inner diameter d on the steel plate respectively; Step 2: cutting the steel plate along the positioning line of the outer diameter D to obtain the bottom plate (2); Step 3: Draw a bisector of the positioning line of the inner diameter d on the bottom plate (2) according to the number of reinforcement frames; Step 4: Weld the vertical rod (4) at the intersection of the bisector and the positioning line of the inner diameter d, and ensure that the outer circle of the vertical rod (4) is tangent to the positioning line of the inner diameter d; Step 5: coaxially weld the reinforcing plate (3) to the bottom plate (2); Step 6: Weld the diagonal rod (5), the upper end of the diagonal rod (5) is connected to the upper end of the vertical rod (4), and the lower end of the diagonal rod (5) is connected to the reinforcing plate (3), so as to obtain a bearing capacity enhancement mechanism; Step 7: insert the manufactured bearing capacity enhancement mechanism into the lower end of the prefabricated pipe pile (1); Step 8: hoist the prefabricated pipe pile (1) together with the bearing capacity enhancement mechanism to the designated pile position; Step 9: Use a pipe sinker or a static pile driver to press the prefabricated pipe pile (1) to the designed elevation. At this time, the prefabricated pipe pile (1) presses the bottom plate (2) to ensure the stability of the bearing capacity enhancement mechanism. The reinforcement frame in the bearing capacity enhancement mechanism supports or limits the prefabricated pipe pile (1), thereby improving the bearing capacity of the prefabricated pipe pile (1).

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