Prestressed concrete pipe pile opening protection device capable of preventing soil entering

Abstract

The invention relates to the technical field of prestressed concrete pipe piles, and discloses an anti-soil-entering prestressed concrete pipe pile opening protection device which comprises a steel plate, a mounting hole is formed in the middle of the steel plate, a pushing mechanism is arranged in the middle of the steel plate, and the pushing mechanism penetrates through the interior of the mounting hole. The bottom of the pushing mechanism is in a bevel angle shape, internal threads are formed in the inner wall of the mounting hole, external threads are arranged on the outer wall of the pushing mechanism, a pushing strip is arranged at the bottom of the steel plate, a bevel opening is formed in the side, close to the pushing mechanism, of the pushing strip, and a top ring is fixedly connected to the side, away from the pushing mechanism, of the pushing strip. The bottom of the steel plate is fixedly connected with a supporting piece, and the pushing strip penetrates through the inner wall of the supporting piece. The hole of the concrete prestressed pipe pile can be blocked through the steel plate, so that long-time blocking of the steel plate is guaranteed, and the problem that the hole is not tightly covered due to the fact that direct covering of a wood plate or a steel plate is easy to move is solved.

Description

Technical Field

[0001] The invention relates to the technical field of prestressed concrete pipe piles, in particular to a prestressed concrete pipe pile hole protection device for preventing soil from entering. Background Art

[0002] Concrete pipe piles are a common prefabricated pile type in infrastructure construction and have a unique structure. It is hollow cylindrical and mainly made of concrete. Depending on different usage requirements, it will also be matched with steel bars or prestressed steel bars. In terms of production technology, the steel skeleton is first placed in a special steel mold, and then concrete that meets the standards is injected. Then the concrete is evenly distributed on the inner wall of the steel mold by centrifugal method to form a dense pipe pile structure. Due to its excellent performance, concrete pipe piles are used in many scenarios. In high-rise residential construction, it can bear the huge weight of the building and ensure the stability of the building; in road and bridge construction, pipe piles can withstand repeated loads generated by vehicle driving and seismic forces; in water conservancy facilities such as docks, it can withstand the scouring and corrosion of seawater and firmly support the superstructure. At present, after the construction of prestressed concrete pipe piles, the openings are often directly covered with simple wooden boards or steel plates, and then the empty piles are backfilled to avoid safety accidents.

[0003] However, using simple wooden or steel plates for direct covering cannot limit the lateral displacement of the wooden or steel plates. Under the action of external force, the wooden or steel plates will move, resulting in loose coverage of the hole, causing earth and stone to fill into the top hole of the pipe pile. This will cause a lot of construction delays and labor cost losses in the later soil extraction and core filling in the pipe pile. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides a prestressed concrete pipe pile hole protection device for preventing soil intrusion, which solves the problem that the existing simple wooden or steel plate is used for direct covering, and the wooden or steel plate is easily moved sideways under the action of external force, resulting in loose covering of the hole, causing earth and stone to fill the top hole of the pipe pile.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a prestressed concrete pipe pile hole protection device for preventing soil intrusion, comprising: a steel plate, a mounting hole is opened in the middle of the steel plate, a pushing mechanism is arranged in the middle of the steel plate, the pushing mechanism passes through the inside of the mounting hole, the bottom of the pushing mechanism is an oblique angle shape, the inner wall of the mounting hole is opened with an internal thread, the outer wall of the pushing mechanism is opened with an external thread, the bottom of the steel plate is provided with a pushing strip, the side of the pushing strip close to the pushing mechanism is opened with an oblique opening, the side of the pushing strip away from the pushing mechanism is fixedly connected with a top ring, the bottom of the steel plate is fixedly connected with a support member, and the pushing strip passes through the inner wall of the support member.

[0006] Preferably, the pushing mechanism includes a first rotating plate and a pushing block, a slot is provided in the middle of the pushing block, a second rotating plate is fixedly connected to the bottom of the first rotating plate, the lower part of the second rotating plate is located inside the slot, and an outer wall of the pushing block is provided with an external thread, and the external thread of the outer wall of the pushing block fits with the internal thread of the mounting hole.

[0007] Preferably, a seating groove is provided on the upper surface of the first rotating plate, a handle is provided on the upper part of the first rotating plate, a through hole is provided at the bottom of the handle, a second rotating shaft is fixedly connected to the inside of the seating groove, the second rotating shaft is located in the through hole at the bottom of the handle, and a baffle is provided on the upper part of the first rotating plate, and the baffle is fixedly connected to the upper edge of the mounting hole.

[0008] Preferably, the outer wall of the push bar is fixedly connected to a first connecting plate, the side wall of the first connecting plate is fixedly connected to one end of the spring, the other end of the spring is fixedly connected to the side wall of the second connecting plate, and the second connecting plate is fixedly connected to the side wall of the support member away from the top ring.

[0009] Preferably, the top ring is in an arc shape, and a rubber sheet is provided on a side of the top ring away from the push bar, and the side surface of the rubber sheet fits with the side surface of the top ring and is also in an arc shape.

[0010] Preferably, the push bars and the top rings are arranged in a circular array with the center of the steel plate as the axis, and there are six of the same structure, and the six top rings can be closed into a circular ring.

[0011] Preferably, a mounting groove is provided on the top surface of the steel plate, a limiting device is provided inside the mounting groove, and a prestressed concrete pipe pile is provided on the outer wall of the steel plate.

[0012] Preferably, the limiting device includes a support plate and a bonding plate, the support plate and the bonding plate are connected by a hinge, a rotation groove is opened at one end of the support plate away from the hinge, a first rotating shaft is fixedly connected to the inside of the mounting groove, and the first rotating shaft is located inside the rotation groove.

[0013] Preferably, the length of the support plate is 5 cm, and the bonding plate and the support plate are arranged in a circular array with the center of the steel plate as the axis, and there are four of the same structure.

[0014] A method for using a prestressed concrete pipe pile hole protection device for preventing soil intrusion, comprising the following steps: S1, flip the support plate upward 90 degrees from the inside of the installation slot through the first rotating shaft, and then flip the bonding plate 90 degrees through the hinge; S2, turn the handle up 90 degrees from the inside of the placement groove through the second rotating shaft, and then lift the handle to put the steel plate into the concrete prestressed pipe pile; S3, rotating the handle, so that the first rotating plate drives the second rotating plate to rotate, and then drives the top block to rotate, so that the top block rotates and moves downward; S4, pushing the push bar outward through the top block, so that the rubber sheet on the outer wall of the top ring fits with the inner wall of the concrete prestressed pipe pile; S5. Fold the laminating plate and the supporting plate into the installation groove through the first rotating shaft and the hinge, and then fold the handle into the installation groove through the second rotating shaft.

[0015] The present invention provides a prestressed concrete pipe pile hole protection device for preventing soil from entering the hole. It has the following beneficial effects: 1. The present invention can seal the holes of the concrete prestressed pipe piles by using a steel plate, and can push the pushing bar to move outwards by a pushing mechanism so that the top ring fits with the inner wall of the concrete prestressed pipe pile, thereby ensuring that the steel plate can be sealed for a long time, thereby improving the direct covering with simple wooden boards or steel plates, which easily causes the wooden boards or steel plates to move, resulting in loose coverage of the hole, and causing earth and stone to fill in the top hole of the pipe pile, thus causing more construction delays and labor cost losses in the later soil extraction and core filling in the pipe of the pipe pile.

[0016] 2. The present invention can increase the contact area with the inner wall of the concrete prestressed pipe pile by making the top ring annular, thereby increasing the pressure and thus the friction. The rubber sheet arranged on the outer wall of the top ring can increase the friction with the inner wall of the concrete prestressed pipe pile, thereby achieving a long-term protective effect inside the concrete prestressed pipe pile.

[0017] 3. The present invention can support the bonding plate through the support plate installed on the upper part of the steel plate, and the protective device can be hung below the top of the concrete prestressed pipe pile through the bonding plate. The length of the support plate is 5 cm, so the protective device can be accurately hung 5 cm below the top of the concrete prestressed pipe pile, thereby facilitating subsequent work. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the steel plate of the present invention; Figure 2 It is a partial side view structural schematic diagram of the top block of the present invention; Figure 3 It is a schematic diagram of the local structure of the bottom of the steel plate of the present invention; Figure 4 It is a schematic diagram of the local three-dimensional structure of the top block of the present invention; Figure 5 It is a schematic diagram of the partial three-dimensional structure of the push bar of the present invention; Figure 6 It is a schematic diagram of the three-dimensional structure of the laminating plate and the supporting plate of the present invention; Figure 7It is a schematic diagram of the three-dimensional structure of the laminating plate and the supporting plate of the present invention when they are unfolded; Figure 8 It is a schematic diagram of the installation three-dimensional structure of the handle of the present invention.

[0019] Among them, 1. baffle; 2. mounting hole; 3. steel plate; 4. mounting groove; 5. first rotating plate; 6. second rotating plate; 7. top block; 8. push bar; 9. rubber sheet; 10. support member; 11. top ring; 12. handle; 13. slot; 14. first connecting plate; 15. spring; 16. second connecting plate; 17. fitting plate; 18. support plate; 19. rotating groove; 20. first rotating shaft; 21. prestressed concrete pipe pile; 22. second rotating shaft; 23. placement groove. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the specification of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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.

[0021] Please refer to the attached Figure 1 -Attached Figure 3 The embodiment of the present invention provides a prestressed concrete pipe pile hole protection device for preventing soil from entering, including: a steel plate 3, a mounting hole 2 is opened in the middle of the steel plate 3, a pushing mechanism is arranged in the middle of the steel plate 3, the pushing mechanism passes through the inside of the mounting hole 2, the bottom of the pushing mechanism is in an oblique shape, the inner wall of the mounting hole 2 is opened with an internal thread, the outer wall of the pushing mechanism is opened with an external thread, a pushing strip 8 is arranged at the bottom of the steel plate 3, an oblique opening is opened on the side of the pushing strip 8 close to the pushing mechanism, a top ring 11 is fixedly connected to the side of the pushing strip 8 away from the pushing mechanism, a support member 10 is fixedly connected to the bottom of the steel plate 3, and the pushing strip 8 passes through the inner wall of the support member 10.

[0022] The steel plate 3 can provide a platform for installing and fixing the jacking mechanism, the push bar 8, the support member 10, etc. At the same time, the steel plate 3 can block the hole of the pipe pile, so that the pipe pile forms a sealing structure to effectively prevent earth and stone from filling into the top hole of the pipe pile, avoiding delays in construction and labor costs caused by taking soil and filling the core in the pipe of the pipe pile in the later stage. The installation hole 2 can be used to install the jacking mechanism, and the internal thread inside the installation hole 2 and the external thread of the jacking mechanism can be meshed with each other, so that the jacking mechanism can achieve the purpose of moving up and down by rotation. The jacking mechanism can play the role of pushing the push bar 8 outward, so that the rubber sheet 9 and the inner wall of the concrete prestressed pipe pile 21 generate greater pressure. The bottom of the jacking mechanism is an oblique shape, which can match the oblique angle of the push bar 8 away from the top ring 11, thereby pushing the push bar 8. The top ring 11 can play the role of installing the rubber sheet 9. The support member 10 can play the role of supporting the push bar 8, thereby allowing the push bar 8 to move smoothly. The self-locking spring device is the jacking mechanism.

[0023] Please refer to the attached Figure 1 and attached Figure 4 In a preferred embodiment of the present invention, the pushing mechanism includes a first rotating plate 5 and a top block 7, a slot 13 is opened in the middle of the top block 7, the bottom of the first rotating plate 5 is fixedly connected to the second rotating plate 6, the lower part of the second rotating plate 6 is located inside the slot 13, and the outer wall of the top block 7 is provided with an external thread, and the external thread of the outer wall of the top block 7 is matched with the internal thread of the mounting hole 2.

[0024] The first rotating plate 5 can drive the second rotating plate 6 to rotate. The top block 7 can squeeze the push bar 8. The slot 13 can place the second rotating plate 6. The second rotating plate 6 is located in the slot 13, so that the rotational force transmitted from the first rotating plate 5 can be transmitted to the inside of the top block 7. The external thread of the outer wall of the top block 7 fits with the internal thread of the mounting hole 2, so that the top block 7 can be rotated and moved downward, thereby generating lateral squeezing on the push bar 8.

[0025] Please refer to the attached Figure 1 and attached Figure 8 In a preferred embodiment of the present invention, a placement groove 23 is provided on the upper surface of the first rotating plate 5, a handle 12 is provided on the upper part of the first rotating plate 5, a through hole is provided at the bottom of the handle 12, a second rotating shaft 22 is fixedly connected to the inside of the placement groove 23, the second rotating shaft 22 is located in the bottom through hole of the handle 12, and a baffle 1 is provided on the upper part of the first rotating plate 5, and the baffle 1 is fixedly connected to the upper edge of the mounting hole 2.

[0026] The placement groove 23 can be used to place the handle 12, so that the handle 12 can be flush with the upper surface of the first rotating plate 5, or even lower than the upper surface after being received in the placement groove 23, thereby avoiding the risk of pressing down on the first rotating plate 5 during subsequent construction. The handle 12 can be used to rotate the first rotating plate 5, and can also be used to lift the entire protective device. The second rotating shaft 22 can be used to allow the handle 12 to rotate freely. The baffle 1 can limit the upward movement of the first rotating plate 5, so that the protective device can be smoothly lifted out by the handle 12.

[0027] Please refer to the attached Figure 5 In a preferred embodiment of the present invention, the outer wall of the push bar 8 is fixedly connected to a first connecting plate 14, the side wall of the first connecting plate 14 is fixedly connected to one end of a spring 15, the other end of the spring 15 is fixedly connected to the side wall of a second connecting plate 16, and the second connecting plate 16 is fixedly connected to the side wall of the support member 10 away from the top ring 11.

[0028] The first connecting plate 14 and the second connecting plate 16 can play the role of fixing the connecting spring 15. When the top block 7 is retracted, the pushing bar 8 can be stretched backward by the spring 15, so that the rubber sheet 9 is separated from the inner wall of the concrete prestressed pipe pile 21, thereby facilitating the removal of the protective device.

[0029] Please refer to the attached Figure 5 In a preferred embodiment of the present invention, the top ring 11 is arc-shaped, and a rubber sheet 9 is provided on the side of the top ring 11 away from the push bar 8, and the side surface of the rubber sheet 9 fits the side surface of the top ring 11 and is also arc-shaped.

[0030] The top ring 11 is arc-shaped and can fit the inner wall of the concrete prestressed pipe pile 21, thereby increasing the contact area and increasing the pressure, thereby maintaining a fixed height protection effect. The rubber sheet 9 can increase the friction with the inner wall of the concrete prestressed pipe pile 21, thereby further increasing the pressure.

[0031] Please refer to the attached Figure 4 In a preferred embodiment of the present invention, the push bar 8 and the top ring 11 are arranged in a ring array with the center of the steel plate 3 as the axis. There are six of the same structure, and the six top rings 11 can be closed into a ring.

[0032] In this way, the concrete prestressed pipe pile 21 can be fitted in multiple directions, thereby increasing the contact area.

[0033] Please refer to the attached Figure 6 -Attached Figure 7 In a preferred embodiment of the present invention, a mounting groove 4 is provided on the top surface of the steel plate 3 , a limiting device is provided inside the mounting groove 4 , and a concrete prestressed pipe pile 21 is provided on the outer wall of the steel plate 3 .

[0034] The installation groove 4 can be used to place the limiting device. When the limiting device is folded, it can be completely placed in the installation groove 4, thereby ensuring the flatness of the top surface of the steel plate 3, thereby avoiding the influence of external construction on the protective device.

[0035] Please refer to the attached Figure 6 -Attached Figure 7 In a preferred embodiment of the present invention, the limiting device includes a support plate 18 and a bonding plate 17, and the support plate 18 and the bonding plate 17 are connected by a hinge. A rotation groove 19 is opened at one end of the support plate 18 away from the hinge, and a first rotating shaft 20 is fixedly connected to the inside of the mounting groove 4, and the first rotating shaft 20 is located inside the rotation groove 19.

[0036] The supporting plate 18 can support the bonding plate 17. The bonding plate 17 can be bonded to the top surface of the concrete prestressed pipe pile 21, thereby fixing the steel plate 3 at a predetermined height. The hinge can facilitate the free rotation of the bonding plate 17 at the end of the supporting plate 18. The rotating groove 19 can be used to install the first rotating shaft 20. The first rotating shaft 20 can facilitate the free rotation of the supporting plate 18.

[0037] Please refer to the attached Figure 6 -Attached Figure 7 In a preferred embodiment of the present invention, the length of the support plate 18 is 5 cm, and the bonding plate 17 and the support plate 18 are arranged in a circular array with the center of the steel plate 3 as the axis, and there are four of the same structure.

[0038] In this way, the protective device can be fixed 5 cm below the pile top when the rubber sheet 9 is not in contact with the inner wall of the concrete prestressed pipe pile 21 .

[0039] The embodiment of the present invention provides a method for using a prestressed concrete pipe pile hole protection device for preventing soil intrusion, comprising the following steps: S1, flip the support plate 18 upward 90 degrees through the first rotating shaft 20 from the inside of the installation groove 4, and then flip the bonding plate 17 up 90 degrees through the hinge; S2, turn up the handle 12 90 degrees from the inside of the placement groove 23 through the second rotating shaft 22, and then lift the handle 12 to put the steel plate 3 into the concrete prestressed pipe pile 21; S3, rotating the handle 12, so that the first rotating plate 5 drives the second rotating plate 6 to rotate, and then drives the top block 7 to rotate, so that the top block 7 rotates and moves downward; S4, pushing the push bar 8 outward through the top block 7, so that the rubber sheet 9 on the outer wall of the top ring 11 fits with the inner wall of the concrete prestressed pipe pile 21; S5. Fold the laminating plate 17 and the supporting plate 18 into the installation groove 4 through the first rotating shaft 20 and the hinge, and then fold the handle 12 into the placement groove 23 through the second rotating shaft 22.

[0040] The construction method is as follows: 1. Pile arrangement: The production of concrete prestressed pipe piles 21 is completed by the pipe pile factory, and our company arranges the piles according to the pile length specified in the design drawings.

[0041] 2. Pile inspection: First check the secondary re-inspection report of the raw materials of the concrete prestressed pipe pile 21, which must comply with the provisions of GB13476-1999; then check the external dimensions, surface finish, rust and flatness of the concrete prestressed pipe pile 21.

[0042] 3. Measure and place pile positions: 1) First, learn the overall layout, project characteristics and design intentions of the project by studying the general plan and design drawings. And understand the location and coordinates of the red line points, the surrounding environment, the on-site terrain and other conditions in the project area.

[0043] 2) After verifying that the provided leveling points, elevations and coordinates are correct, complete the visa procedures in a timely manner.

[0044] 3) According to the coordinates and control point coordinates provided on the positioning map, use the total station to determine the axis control points and station control points, and project the direction marks of the control points onto the surrounding buildings or walls.

[0045] 4) The polar coordinate method is used for stake laying. First, the distance and angle from each measuring point to the measuring station are calculated, and the stake laying data table is filled out. After two people calculate and proofread separately, they sign and approve. Each stake is laid out using the theodolite. After the stake is self-checked and found to be correct, it is marked with a conspicuous mark and reported to the general contractor and supervisor for review and acceptance, and the relevant procedures are handled.

[0046] 4. Pile driver in place: The pile driver must be level, stable and reliable, the center of the pile clamp must match the pile position, the error is ≤2cm, and the verticality error is <1%. The relevant indicators shall be checked by the technical staff and approved by the supervisor before entering the next process.

[0047] 5. Pile hoisting and pile centering adjustment: The hoisting should strictly comply with the relevant requirements of JGJ94-94 on hoisting. It is prohibited to drag the lower part of the pile on the ground during hoisting. After the pile is hoisted, observe whether the pile is damaged or deformed. The pile centering should be consistent with the ground pile position, with an error of ≤5mm. After the centering is completed, the pile body should be kept vertical.

[0048] 6. Pile pressing: After the above procedures are completed, the pile can be pressed. When pressing the pile, you should always pay attention to keep the pile in the state of axial compression. If there is any deviation, adjust it in time to avoid accidents. During the process of pile pressing, pay attention to the changes in the oil pressure gauge. If there is any abnormality, it should be studied and solved in time.

[0049] 7. Pile connection: The pile head should be 1 meter away from the ground. When welding the pile head, be sure to remove the debris (mud) on the welding surface to ensure close contact between the upper and lower parts. The weld should be full and substantial without any residual slag. After welding, stay for 1 minute for self-inspection and pass it. It can be pressed into the soil only after confirmation by the supervisor.

[0050] 8. When connecting piles, the ground reserved height of the lower pile section is about 1m. During operation, a guide hoop should be set at the pile head of the lower pile section to facilitate the positioning of the upper pile section. When connecting piles, the upper and lower pile sections should be kept straight, the center line deviation should not be greater than 2mm, and the node bending arrow height should not be greater than 1‰ of the pile length. After straightening, first symmetrically spot weld 4-6 points on the circumference of the groove, remove the guide hoop after the upper and lower pile sections are fixed, and then weld in layers.

[0051] 9. After the pile connection is completed and passed the inspection, the pile is pressed. A prestressed concrete pipe pile hole protection device is installed at the top of the last pile. The device is installed on the inner wall of the pipe pile hole and is not affected by the construction process. Both static pressure and hammering construction methods are possible. The device adopts a circular steel plate 3. The diameter of the steel plate 3 coincides with or is slightly smaller than the inner diameter of the concrete prestressed pipe pile 21. A circle of movable metal rings is set on the edge of the steel plate, which is the top ring 11. The middle part of the steel plate 3 is equipped with a hole 2. A self-locking retaining spring device is installed in the mounting hole 2, which is the pushing mechanism. The bottom of the self-locking retaining spring device contacts the top ring 11 around the steel plate 3. After the retaining spring is moved downward, the steel plate 3 and the surrounding top ring 11 are stuck in the concrete prestressed pipe pile 21 and keep a distance of about 5 cm from the pile top to avoid damage to the device due to pressure during the construction of the pipe pile. After the earth excavation is completed, the self-locking retaining spring in the middle of the steel plate 3 is dug out, the retaining spring is opened, the overall device is taken out, and the next process can be carried out.

[0052] 10. Pile delivery: When delivering piles, the center of the pile driver must coincide with the center of the pile, and the elevation of the pile top must be calibrated with a level.

[0053] 11. Final pressure: The final pressure index must be controlled by both pile length and oil pressure value. When the pile length reaches the requirement but the oil pressure value does not reach the requirement, the pile length should continue to be increased. When the oil pressure value meets the requirement but there is still surplus pile length, in principle, all pile sections should be pressed in. The final pressure index shall be determined based on the test pile situation. Before the construction of the engineering piles starts, our company shall, together with the supervision company, determine the final pressure index by section within the range permitted by the specifications and strictly implement it during construction.

[0054] Working principle: From the inside of the installation groove 4, the support plate 18 is flipped up 90 degrees through the first rotating shaft 20, and then the bonding plate 17 is flipped up 90 degrees through the hinge to prepare for the subsequent placement of the steel plate 3. From the inside of the placement groove 23, the handle 12 is flipped up 90 degrees through the second rotating shaft 22 for easy holding. At this time, the support plate 18 and the bonding plate 17 of the limiting device are unfolded, which can ensure that the top surface of the steel plate 3 is 5 cm away from the top of the concrete prestressed pipe pile 21 when the steel plate 3 is placed. Rotate the handle 12, the first rotating plate 5 drives the second rotating plate 6 to rotate, and then drives the top block 7 to rotate. Since the external thread of the outer wall of the top block 7 fits with the internal thread of the mounting hole 2, the top block 7 moves downward while rotating. The bottom of the top block 7 is an angled shape. During the downward movement, its angle will contact and squeeze the oblique opening of the push strip 8 close to the push mechanism, pushing the push strip 8 outward. When the top block 7 pushes the push bar 8, the spring 15 is stretched; when the top block 7 no longer applies thrust, the spring 15 can reset the push bar 8. When the push bar 8 moves outward, it drives the top ring 11 to move outward together, so that the rubber sheet 9 on the outer wall of the top ring 11 fits tightly with the inner wall of the concrete prestressed pipe pile 21, thereby sealing and fixing the pipe pile hole to prevent earth and stone from entering the pipe pile.

[0055] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A prestressed concrete pipe pile hole protection device for preventing soil intrusion, comprising: A steel plate (3), characterized in that a mounting hole (2) is provided in the middle of the steel plate (3), a pushing mechanism is provided in the middle of the steel plate (3), the pushing mechanism passes through the inside of the mounting hole (2), the bottom of the pushing mechanism is in an oblique angle shape, the inner wall of the mounting hole (2) is provided with an internal thread, the outer wall of the pushing mechanism is provided with an external thread, a pushing strip (8) is provided at the bottom of the steel plate (3), an oblique opening is provided on the side of the pushing strip (8) close to the pushing mechanism, a top ring (11) is fixedly connected to the side of the pushing strip (8) away from the pushing mechanism, and a support member (10) is fixedly connected to the bottom of the steel plate (3), and the pushing strip (8) passes through the inner wall of the support member (10).

2. A prestressed concrete pipe pile hole protection device for preventing soil intrusion according to claim 1, characterized in that: The pushing mechanism comprises a first rotating plate (5) and a pushing block (7); a slot (13) is provided in the middle of the pushing block (7); a second rotating plate (6) is fixedly connected to the bottom of the first rotating plate (5); the lower part of the second rotating plate (6) is located inside the slot (13); an outer wall of the pushing block (7) is provided with an external thread, and the external thread of the outer wall of the pushing block (7) is mutually matched with the internal thread of the mounting hole (2).

3. A prestressed concrete pipe pile hole protection device for preventing soil intrusion according to claim 2, characterized in that: A placement groove (23) is provided on the upper surface of the first rotating plate (5); a handle (12) is provided on the upper part of the first rotating plate (5); a through hole is provided at the bottom of the handle (12); a second rotating shaft (22) is fixedly connected to the inside of the placement groove (23); the second rotating shaft (22) is located in the through hole at the bottom of the handle (12); a baffle (1) is provided on the upper part of the first rotating plate (5); the baffle (1) is fixedly connected to the upper edge of the mounting hole (2).

4. A prestressed concrete pipe pile hole protection device for preventing soil intrusion according to claim 3, characterized in that: The outer wall of the push bar (8) is fixedly connected to a first connecting plate (14), the side wall of the first connecting plate (14) is fixedly connected to one end of a spring (15), the other end of the spring (15) is fixedly connected to the side wall of a second connecting plate (16), and the second connecting plate (16) is fixedly connected to the side wall of the support member (10) away from the top ring (11).

5. A prestressed concrete pipe pile hole protection device for preventing soil intrusion according to claim 4, characterized in that: The top ring (11) is in an arc shape, and a rubber sheet (9) is provided on a side of the top ring (11) away from the push bar (8), and the side surface of the rubber sheet (9) fits into the side surface of the top ring (11) and is also in an arc shape.

6. A prestressed concrete pipe pile hole protection device for preventing soil intrusion according to claim 5, characterized in that: The push bars (8) and the top rings (11) are arranged in a circular array with the center of the steel plate (3) as the axis. There are six such structures in total. The six top rings (11) can be closed into a circular ring.

7. A prestressed concrete pipe pile hole protection device for preventing soil intrusion according to claim 6, characterized in that: The top surface of the steel plate (3) is provided with a mounting groove (4), a limiting device is provided inside the mounting groove (4), and the outer wall of the steel plate (3) is provided with concrete prestressed pipe piles (21).

8. A prestressed concrete pipe pile hole protection device for preventing soil intrusion according to claim 7, characterized in that: The limiting device comprises a support plate (18) and a bonding plate (17), wherein the support plate (18) and the bonding plate (17) are connected via a hinge, a rotation groove (19) is provided at one end of the support plate (18) away from the hinge, a first rotation shaft (20) is fixedly connected to the interior of the mounting groove (4), and the first rotation shaft (20) is located inside the rotation groove (19).

9. A prestressed concrete pipe pile hole protection device for preventing soil intrusion according to claim 8, characterized in that: The length of the support plate (18) is 5 cm. The bonding plate (17) and the support plate (18) are arranged in a circular array with the center of the steel plate (3) as the axis. There are four of the same structure in total.

10. A method for using a prestressed concrete pipe pile hole protection device for preventing soil intrusion according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1, turning the support plate (18) upwards by 90 degrees from the inside of the installation groove (4) via the first rotating shaft (20), and then turning the bonding plate (17) upwards by 90 degrees via the hinge; S2, turning up the handle (12) by 90 degrees from the inside of the placement groove (23) through the second rotating shaft (22), and then lifting the handle (12) to place the steel plate (3) into the concrete prestressed pipe pile (21); S3, rotating the handle (12), thereby causing the first rotating plate (5) to drive the second rotating plate (6) to rotate, thereby driving the top block (7) to rotate, so that the top block (7) rotates and moves downward; S4, pushing the push bar (8) outwards through the push block (7), thereby making the rubber sheet (9) on the outer wall of the top ring (11) fit with the inner wall of the concrete prestressed pipe pile (21); S5. The laminating plate (17) and the supporting plate (18) are folded and stored in the installation groove (4) through the first rotating shaft (20) and the hinge, and then the handle (12) is folded and stored in the placement groove (23) through the second rotating shaft (22).

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