Implanted rock-socketed steel pipe pile structure

Abstract

The utility model discloses an embedded rock-socketed steel pipe pile structure which is composed of a main body steel pipe pile, lifting lugs, a plugging cover plate, pile bottom prefabricated concrete, an in-pile grouting system and a water passing hole, a pair of lifting lugs is symmetrically arranged at the top end of the outer side wall of the main body steel pipe pile, and the plugging cover plate is arranged at the pile top of the main body steel pipe pile. Prefabricated concrete with a certain height is arranged at the pile bottom of the main steel pipe pile, and a water passing hole is formed in the center of the bottom of the prefabricated concrete at the pile bottom. The in-pile grouting system is composed of a short grouting pipe, a flange, an upper grout outlet, a lower grout outlet and a long grouting pipe. The device also has the advantages of reducing the pouring time of offshore bottom sealing concrete and the time of reaching the design strength after the concrete is solidified, ensuring the strength of the concrete, one-time continuous grouting in place, ensuring the pile planting grouting effect, not waiting for the strength of the bottom sealing concrete, saving the offshore construction time, reducing the investment of manpower and material resources, reducing the construction cost and the like.

Description

Technical Field

[0001] This utility model relates to the field of rock-embedded steel pipe pile structures for wind power and bridge construction, and in particular to a rock-embedded steel pipe pile structure. Background Technology

[0002] In recent years, with the explosive growth of offshore wind power, the application of steel pipe piles for wind turbine foundations has become increasingly widespread, among which embedded rock-socketed steel pipe piles are a relatively traditional foundation type. Embedded rock-socketed steel pipe piles refer to bored cast-in-place piles where a considerable length of the lower part is cast into hard rock strata.

[0003] Currently, traditional steel pipe pile foundations typically involve first inserting the steel pipe piles, then pouring the bottom concrete, and finally backfilling the pile with sand and gravel after the piles have reached the required strength. Grouting material is then applied to the outer wall of the steel pipe piles to complete the rock-embedded steel pipe pile grouting process. The disadvantages of this traditional process are: (1) complex process transitions, significant uncertainty in the completion of each process, large cumulative construction errors, and difficulty in guaranteeing the grouting effect; (2) disruption of the grouting construction continuity, resulting in mud inclusions; and (3) increased waiting time for the bottom concrete to reach its strength, requiring additional manpower and resources, and increasing construction costs. Therefore, the grouting of embedded steel pipe piles has always been a concern in the field of rock-embedded foundation steel pipe pile construction. Summary of the Invention

[0004] The purpose of this utility model is to provide an embedded rock-socketed steel pipe pile structure that can reduce the number of grouting construction steps, ensure the continuity of grouting construction, shorten the construction time at sea, and is reasonably designed and easy to use.

[0005] The purpose of this utility model is achieved as follows:

[0006] A rock-embedded steel pipe pile structure is characterized by comprising a main steel pipe pile, lifting lugs, a sealing cover plate, precast concrete at the pile bottom, an internal grouting system, and a water passage hole. A pair of lifting lugs are symmetrically arranged at the top of the outer side wall of the main steel pipe pile. A sealing cover plate is provided at the top of the main steel pipe pile. Precast concrete at the pile bottom of the main steel pipe pile is provided at a certain height, and a water passage hole is provided at the center of the bottom of the precast concrete. The internal grouting system consists of a short grouting pipe, a flange, an upper grout outlet, a lower grout outlet, and a long grouting pipe. The grouting system consists of short and long grouting pipes, both made of hollow steel pipes, evenly arranged along the inner side of the main steel pipe pile. Depending on the pile length, an upper grout outlet connected to the short grouting pipe is provided on the side wall of the main steel pipe pile. The lower end of the long grouting pipe passes downward through the precast concrete at the bottom of the pile, and a lower grout outlet connected to the long grouting pipe is provided on the bottom plate of the main steel pipe pile. A flange is provided at the top of each short and long grouting pipe to prevent concrete from flowing back into them.

[0007] The main steel pipe pile is a rolled and welded steel plate structure, and the sealing cover plate is a circular plate slightly smaller than the inner diameter of the main steel pipe pile.

[0008] This utility model consists of a main steel pipe pile, lifting lugs, sealing cover plates, precast concrete at the pile bottom, a grouting system inside the pile, and a water passage hole. During pile planting, the main steel pipe pile is installed into the pile hole through the lifting lugs, and grouting is carried out continuously to the design position through the pre-connected grouting system in one go.

[0009] Compared with the prior art, this utility model has the following advantages:

[0010] 1. Precast concrete is installed at the bottom of the main steel pipe piles to reduce the pouring time of the bottom sealing concrete at sea and the time it takes for the concrete to reach the design strength after solidification. The curing effect of the precast concrete at the bottom of the piles is better than that of cast-in-place concrete, and it can also ensure the strength of the concrete.

[0011] 2. Reduce sand filling in pile holes and optimize construction procedures;

[0012] 3. The grouting system inside the main steel pipe piles is installed quickly and continuously in one go by pre-set grouting pipes, ensuring the grouting effect of the pile planting.

[0013] 4. By setting water passage holes, the "floating pile" phenomenon caused by the hollowness of the main steel pipe pile is avoided. At the same time, a sealing cover plate is set on the top of the main steel pipe pile to ensure that the grouting material will not leak into the interior of the main steel pipe pile during the construction of the guide frame.

[0014] 5. There is no need to wait for the bottom sealing concrete to reach its full strength, saving time in offshore construction, reducing the input of manpower and materials, and lowering construction costs. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall design of this utility model;

[0016] Figure 2 This is a top view of the present invention;

[0017] Figure 3 This is a diagram showing the usage state of this utility model. Detailed Implementation

[0018] The present utility model patent will be further described in detail below with reference to the accompanying drawings and embodiments.

[0019] A rock-embedded steel pipe pile structure comprises a main steel pipe pile 1, lifting lugs 2, sealing cover plates 3, precast concrete at the pile bottom 4, an internal grouting system 5, and a water passage hole 6. A pair of lifting lugs 2 are symmetrically arranged at the top of the outer side wall of the main steel pipe pile 1. Based on the length of the guide frame legs, a sealing cover plate 3 is provided in the upper middle part of the main steel pipe pile 1, above the flange 8. According to stress analysis, a precast concrete pile bottom 4 of a certain height is provided at the bottom of the main steel pipe pile 1, and a water passage hole 6 is located at the center of the bottom of the precast concrete pile bottom 4. The internal grouting system 5 consists of a short grouting pipe 7, a flange 8, and an upper grout outlet 9. The main steel pipe pile 1 consists of a lower grout outlet 10 and a long grouting pipe 11. Inside the main steel pipe pile 1, there are short grouting pipes 7 and long grouting pipes 11, which are made of hollow steel pipes and are evenly arranged along the inner side of the pile. Depending on the pile length, an upper grout outlet 9 connected to the short grouting pipe 7 is provided on the side wall of the main steel pipe pile 1. The lower end of the long grouting pipe 11 passes downward through the precast concrete 4 at the bottom of the pile. A lower grout outlet 10 connected to the long grouting pipe 11 is provided on the bottom plate of the main steel pipe pile 1. A flange 8 is provided at the top of each short grouting pipe 7 and long grouting pipe 11 to prevent concrete from flowing back into the short grouting pipe 7 and long grouting pipe 11.

[0020] The main steel pipe pile 1 is a steel plate rolled and welded structure, and the sealing cover plate 3 is a circular plate slightly smaller than the inner diameter of the main steel pipe pile 1.

[0021] Working status: During pile planting, the main steel pipe pile 1 is installed into the pile hole 12 through the lifting lug 2. The mud in the pile hole 12 enters the pile hole 12 through the water passage 6. The grouting material overflows through the short grouting pipe 7 and the long grouting pipe 11 on the pile grouting system 5 and fills the gap between the side wall of the main steel pipe pile 1 and the inner wall of the pile hole 12 through the corresponding upper grout outlet 9 and lower grout outlet 10 set on the main steel pipe pile 1.

[0022] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A rock-embedded steel pipe pile structure, characterized in that: It consists of a main steel pipe pile, lifting lugs, sealing cover plates, precast concrete at the pile bottom, an internal grouting system, and a water passage hole. A pair of lifting lugs are symmetrically located at the top of the outer wall of the main steel pipe pile. A sealing cover plate is located at the top of the main steel pipe pile. A certain height of precast concrete is located at the bottom of the main steel pipe pile, and a water passage hole is located at the center of the bottom of the precast concrete. The internal grouting system consists of a short grouting pipe, a flange, an upper grout outlet, a lower grout outlet, and a long grouting pipe. The steel pipe pile has short and long grouting pipes, which are made of hollow steel pipes, evenly arranged along the inner side of the pile. Depending on the pile length, there is an upper grout outlet on the side wall of the main steel pipe pile that communicates with the short grouting pipe. The lower end of the long grouting pipe passes through the precast concrete at the bottom of the pile. There is a lower grout outlet on the bottom plate of the main steel pipe pile that communicates with the long grouting pipe. A flange is provided at the top of each short and long grouting pipe to prevent concrete from flowing back into the short and long grouting pipes.

2. The embedded rock-socketed steel pipe pile structure according to claim 1, characterized in that: The main steel pipe pile is a rolled and welded steel plate structure, and the sealing cover plate is a circular plate slightly smaller than the inner diameter of the main steel pipe pile.

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