A variable cross-section helical pipe pile with anti-torsion component

Abstract

This invention provides a variable cross-section spiral pipe pile with anti-torsion components, belonging to the field of prestressed concrete piles. This invention solves the problems of inconvenient demolding during spiral pipe pile production and pile fracture caused by excessive torque at a certain point on the pile body through the design of the raised platform, the central through hole, and the anti-torsion components. The variable cross-section spiral pipe pile with anti-torsion components includes: a columnar part, a spiral part, and anti-torsion components; the spiral part is spirally distributed circumferentially along the outer wall of the columnar part; the columnar part has a central through hole, and at least one anti-torsion component is fixedly installed on the inner wall of the central through hole and passes through both ends of the central through hole, the central through hole and the anti-torsion components forming an anti-rotation structure; the spiral part is provided with raised platforms, and two adjacent raised platforms along the length direction of the spiral pipe pile are spaced 180° apart circumferentially.

Description

Technical Field

[0001] This invention belongs to the field of prestressed concrete piles, and in particular relates to a variable cross-section spiral pipe pile with anti-torsion components. Background Technology

[0002] Currently, we generally use the pile driver's power head and drill rod to apply downward pressure and torque to the helical pipe pile. After being subjected to downward pressure and torque, the helical pipe pile rotates into the soil. When the helical pipe pile rotates into some special soil layers, such as soil layers with high cohesion, a large torque is required. However, the helical pipe pile itself has a certain torsional strength. If the torque is too large, it will cause certain damage to the pile body. In this case, we need to take corresponding measures to avoid such damage. At the same time, in order to open the mold smoothly when the pipe pile mold consists of two mold halves, then a special demolding port must be set on the mold halves. If the mold halves do not have demolding ports, then the pipe pile mold must be composed of at least three mold halves. Summary of the Invention

[0003] In view of the shortcomings of the prior art described above, the purpose of this invention is to provide a variable cross-section spiral pipe pile with anti-torsion components to solve the problems of excessive torque damaging the pile body and inconvenience in demolding the pipe pile mold in the prior art.

[0004] To achieve the above and other related objectives, the present invention provides a variable cross-section helical pipe pile with an anti-torsion component. The variable cross-section helical pipe pile with an anti-torsion component includes: a columnar portion, a helical portion, and an anti-torsion component; the helical portion is distributed circumferentially along the outer wall of the columnar portion, the helical portion is continuous, and the helical portion is fixedly connected to the outer wall of the columnar portion; the columnar portion has a central through hole, and at least one of the anti-torsion components is fixedly installed on the inner wall of the central through hole and passes through both ends of the central through hole, the central through hole and the anti-torsion component form an anti-rotation structure; the helical portion is provided with a protrusion, and two adjacent protrusions along the length direction of the helical pipe pile are spaced 180° apart circumferentially.

[0005] Optionally, the columnar portion includes a pile body, end plates, and a reinforcing cage. The end plates are fixedly installed at both ends of the pile body, the reinforcing cage is disposed within the pile body, and the central through hole is formed within the pile body and on the end plates.

[0006] Optionally, the anti-torsion member is a U-shaped channel steel, and at least one slot is provided on the inner wall of the central through hole on one end plate. The anti-torsion member is fixedly connected to the inner wall of the central through hole in the pile body. The slot of the anti-torsion member passes through the slot and penetrates both ends of the end plate. The top of the slot of the anti-torsion member is flush with the inner wall of the central through hole or the top of the slot of the anti-torsion member protrudes from the inner wall of the central through hole.

[0007] Optionally, the anti-torsion member is a steel bar, which is fixedly installed on the inner wall of the central through hole and protrudes from the inner wall of the central through hole.

[0008] Optionally, the protrusion is disposed on the upper and / or lower surface of the spiral portion.

[0009] Optionally, the connection between the protrusion and the spiral portion is a smooth transition;

[0010] Alternatively, the connection between the protrusion and the spiral part is a stepped structure.

[0011] Optionally, the columnar portion further includes a transition plate, which is installed at one end of the end plate and / or between the two ends of the pile body, and the central through hole is also formed on the transition plate.

[0012] Optionally, the reinforcing cage includes longitudinal reinforcing bars and stirrups, wherein the longitudinal reinforcing bars are elongated and the stirrups are circular; the longitudinal reinforcing bars are arranged in a circular pattern, the central axis of the stirrups coincides with the central axis of the pile body, the stirrups and the longitudinal reinforcing bars are fixedly connected, the axis of the longitudinal reinforcing bars and the central axis of the stirrups are parallel to each other, and at least one transition plate is fixedly installed on the pile body and the longitudinal reinforcing bars pass through the transition plate on the pile body.

[0013] Optionally, both ends of the longitudinal reinforcement are fixedly connected to the end plates at both ends of the pile body.

[0014] Optionally, the reinforcing cage further includes longitudinal reinforcing bars, which are arranged alternately with the longitudinal steel bars, and the two ends of the longitudinal reinforcing bars are fixedly connected to the end plates at both ends of the pile body.

[0015] As described above, the variable cross-section helical pipe pile with anti-torsion element of the present invention has at least the following beneficial effects:

[0016] 1. This application solves the problem of inconvenient demolding when the mold for producing spiral pipe piles has only two halves through the design of the protruding platform.

[0017] 2. The design of the protruding platform in this application enables the spiral pipe pile to form a cavity near the protruding platform during the spiraling process into the soil, thereby reducing the spiral friction resistance on the surface of the spiral part and lowering the resistance torque of the spiral pipe pile into the soil.

[0018] 3. Through the design of the central through hole and the anti-torsion component, this application enables the drill rod to pass through the central through hole when the construction personnel apply downward pressure and torque to the helical pipe pile using the drill rod. The central through hole and the anti-torsion component form an anti-rotation structure, and the drill rod and the entire anti-torsion component are aligned. In this way, the torque applied by the drill rod is distributed to the entire pile body through the anti-torsion component, thereby avoiding damage such as pile breakage caused by excessive torque at a certain point on the pile body.

[0019] 4. The design of the transition plate in this application further disperses the torsional force on the pile body, reducing the possibility of damage to the pile body due to large torsional forces. Attached Figure Description

[0020] Figure 1 The diagram shown is a schematic diagram of a variable cross-section spiral pipe pile with anti-torsion components according to the present invention.

[0021] Figure 2 The diagram shown is a schematic representation of the hidden columnar portion of the present invention.

[0022] Figure 3 Displayed as Figure 2 A magnified view of a portion of the image.

[0023] Figure 4 The diagram shown is a schematic representation of the protrusion of the present invention.

[0024] Component designation explanation

[0025] Columnar part 1, pile body 11, end plate 12, steel cage 13, longitudinal steel bar 131, stirrup 132, longitudinal reinforcing bar 133, slot 14, transition plate 15, spiral part 2, protrusion 21, anti-torsion component 3, central through hole 4. Detailed Implementation

[0026] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0027] Please see Figures 1 to 4It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0028] The following embodiments are for illustrative purposes only. These embodiments can be combined and are not limited to the content shown in any single embodiment below.

[0029] Please see Figures 1 to 4 This invention provides a variable cross-section spiral pipe pile with anti-torsion components. The variable cross-section spiral pipe pile with anti-torsion components includes: a columnar portion 1, a spiral portion 2, and anti-torsion components 3. The spiral pipe pile is a reinforced concrete integrally formed structure. The spiral portion 2 is spirally distributed circumferentially along the outer wall of the columnar portion 1, and the spiral portion 2 is continuous. The spiral portion 2 and the outer wall of the columnar portion 1 are fixedly connected. The columnar portion 1 has a central through hole 4, and at least one anti-torsion component 3 is fixedly installed on the inner wall of the central through hole 4 and passes through both ends of the central through hole 4. The central through hole 4 and the anti-torsion component 3 form an anti-rotation structure. The spiral portion 2 is provided with protrusions 21. Two adjacent protrusions 21 along the length direction of the spiral pipe pile are spaced 180° apart circumferentially. The purpose of designing the protrusions 21 here is to prevent damage during the production of the spiral pipe pile, especially for piles with only a few petals. The two-part mold allows for the design of a spiral cavity corresponding to the protrusion 21 within the mold's inner cavity. This facilitates easy demolding even with only two parts. Furthermore, the design of the protrusion 21 creates a cavity near the protrusion 21 during the spiral pipe pile's entry into the soil, reducing the spiral friction resistance on the surface of the spiral section 2 and lowering the resistance torque during the spiral pipe pile's entry into the soil. The design of the central through-hole 4 and the anti-torsion component 3 ensures that when the drill rod applies downward pressure and torque to the spiral pipe pile, it passes through the central through-hole 4. The central through-hole 4 and the anti-torsion component 3 form an anti-rotation structure, with the drill rod and the entire anti-torsion component 3 aligned. This disperses the torque applied by the drill rod across the entire pile body 11 through the anti-torsion component 3, preventing excessive torque at any point on the pile body 11 from causing breakage or other damage.

[0030] For this embodiment, please refer to Figure 1 and Figure 3 The columnar part 1 includes a pile body 11, an end plate 12, and a reinforcing cage 13. The end plate 12 is fixedly installed at both ends of the pile body 11, and the reinforcing cage 13 is disposed inside the pile body 11. The central through hole 4 is opened inside the pile body 11 and on the end plate 12. In the integrally formed reinforced concrete pipe pile, the reinforcing cage 13 provides support for the entire pile body 11, while the end plate 12 plays the role of connecting and strengthening the strength of the entire pile body 11.

[0031] For this embodiment, please refer to Figure 1 and Figure 3 The anti-torsion component 3 is a U-shaped channel steel. At least one slot 14 is opened on the inner wall of the central through hole 4 on one end plate 12. The anti-torsion component 3 is fixedly connected to the inner wall of the central through hole 4 in the pile body 11. The slot of the anti-torsion component 3 passes through the slot 14 and through both ends of the end plate 12. The top of the slot of the anti-torsion component 3 is flush with the inner wall of the central through hole 4 or the top of the slot of the anti-torsion component 3 protrudes from the inner wall of the central through hole 4. This is a structure we currently use. During the production process, we apply lubricating oil to the inner wall of the U-shaped channel steel and then fill the slot with a rubber strip with steel wire rope. In this way, when producing reinforced concrete spiral pipe piles on the centrifuge, the slot of the U-shaped channel steel will not be filled with cement. After the mold is opened, the rubber strip with steel wire rope is removed, and the groove of the U-shaped channel steel is still smooth and empty, so that it can cooperate with the key strip on the drill rod to form an anti-rotation structure while dispersing the torque of the drill rod.

[0032] In this embodiment, the anti-torsion member 3 is a steel bar, which is fixedly installed on the inner wall of the central through hole 4. The anti-torsion member 3 protrudes from the inner wall of the central through hole 4. Another matching method is given here, in which the groove on the drill rod matches the steel bar on the inner wall of the central through hole 4.

[0033] For this embodiment, please refer to Figure 1 and Figure 4 The protrusion 21 can be disposed on the spiral part 2 in the following ways:

[0034] The protrusion 21 is disposed on the upper surface of the spiral part 2;

[0035] Alternatively, the protrusion 21 may be disposed on the lower surface of the spiral portion 2;

[0036] Alternatively, the protrusions 21 may be asymmetrically arranged on the upper and lower surfaces of the spiral portion 2;

[0037] Alternatively, the protrusions 21 may be symmetrically arranged on the upper and lower surfaces of the spiral portion 2. Figure 4 ).

[0038] For this embodiment, please refer to Figure 1 and Figure 4 The connection between the raised platform 21 and the spiral part 2 is a smooth transition, which makes the resistance transmission on the spiral part 2 more uniform and continuous; or, the connection between the raised platform 21 and the spiral part 2 is a stepped structure, but the stepped shape of the connection between the raised platform 21 and the spiral part 2 makes it easier to demold during the production of pipe piles than the smooth transition of the connection between the raised platform 21 and the spiral part 2. At the same time, the resistance transmitted by the spiral part 2 is not uniform and continuous.

[0039] For this embodiment, please refer to Figure 1 and Figure 3 The feature is that the columnar part 1 further includes a transition plate 15, which is installed at one end of the end plate 12 and / or between the two ends of the pile body 11. The central through hole 4 is also opened on the transition plate 15. When the drill rod passes through the central through hole 4, it also passes through the transition plate 15. When the drill rod rotates, the drill rod drives the pile body 11 to rotate through the transition plate 15 and the anti-torsion member 3. Thus, the downward torque of the drill rod is applied to the transition plate 15 and distributed along the anti-torsion member 3 to the entire pile body 11, thereby avoiding damage to the pile body 11 caused by excessive torque of the drill rod.

[0040] For this embodiment, please refer to Figure 3 The reinforcing cage 13 includes longitudinal reinforcing bars 131 and stirrups 132. The longitudinal reinforcing bars 131 are elongated, and the stirrups 132 are circular. The longitudinal reinforcing bars 131 are arranged in a circular pattern. The central axis of the stirrups 132 coincides with the central axis of the pile body 11. The stirrups 132 and the longitudinal reinforcing bars 131 are fixedly connected. The axis of the longitudinal reinforcing bars 131 and the central axis of the stirrups 132 are parallel to each other. At least one transition plate 15 is fixedly installed on the pile body 11, and the longitudinal reinforcing bars 131 pass through the transition plate 15 on the pile body 11. Both ends of the longitudinal reinforcing bars 131 are fixedly connected to the end plates 12 at both ends of the pile body 11. The purpose of fixing the longitudinal reinforcing bars 131, the end plates 12, and the transition plate 15 is to further strengthen the strength of the spiral pipe pile.

[0041] For this embodiment, please refer to Figure 3The steel cage 13 also includes longitudinal reinforcing bars 133, which are arranged alternately with longitudinal steel bars 131. The two ends of the longitudinal reinforcing bars 133 are fixedly connected to the end plates 12 at both ends of the pile body 11. The design of the longitudinal reinforcing bars 133 further enhances the strength of the entire spiral pipe pile.

[0042] In summary, the present invention, through the design of the protruding platform 21, solves the problem of inconvenient demolding when the mold for producing spiral pipe piles has only two halves, and creates a cavity near the protruding platform 21 during the spiral pipe pile's entry into the soil, thereby reducing the spiral friction resistance on the surface of the spiral part 2 and lowering the resistance torque of the spiral pipe pile entering the soil. Simultaneously, through the design of the central through hole 4 and the anti-torsion member 3, when construction personnel apply downward pressure and torque to the spiral pipe pile using the drill rod, the drill rod passes through the central through hole 4, and the central through hole 4 and the anti-torsion member 3 form an anti-rotation structure. The drill rod and the entire anti-torsion member 3 are aligned, thus distributing the torque applied by the drill rod to the entire pile body 11 through the anti-torsion member 3, thereby preventing excessive torque at a certain point on the pile body 11 from causing breakage or other damage. Furthermore, through the design of the transition plate 15, the torque on the pile body 11 is further dispersed, reducing the possibility of damage to the pile body 11 due to excessive torque. Therefore, this invention effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0043] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A variable cross-section helical pipe pile with anti-torsional components, characterized in that, The variable cross-section spiral pipe pile with anti-torsion component includes: a columnar part, a spiral part, and an anti-torsion component; the spiral part is distributed circumferentially spirally along the outer wall of the columnar part, the spiral part is continuous, and the spiral part and the outer wall of the columnar part are fixedly connected; the columnar part is provided with a central through hole, and at least one of the anti-torsion components is fixedly installed on the inner wall of the central through hole and passes through both ends of the central through hole, the central through hole and the anti-torsion component form an anti-rotation structure; the spiral part is provided with a protrusion, and two adjacent protrusions along the length direction of the spiral pipe pile are spaced 180° apart circumferentially; The columnar portion includes a pile body, end plates, and a reinforcing cage. The end plates are fixedly installed at both ends of the pile body, the reinforcing cage is disposed in the pile body, and the central through hole is formed in the pile body and the end plates. The anti-torsion member is a U-shaped channel steel. At least one slot is provided on the inner wall of the central through hole on one end plate. The anti-torsion member is fixedly connected to the inner wall of the central through hole in the pile body. The slot of the anti-torsion member passes through the slot and penetrates both ends of the end plate. The top of the slot of the anti-torsion member is flush with the inner wall of the central through hole or the top of the slot of the anti-torsion member protrudes from the inner wall of the central through hole.

2. A variable cross-section spiral pipe pile with anti-torsion component according to claim 1, characterized in that: The protrusion is disposed on the upper and / or lower surface of the spiral portion.

3. A variable cross-section spiral pipe pile with anti-torsional components according to claim 1, characterized in that: The connection between the protrusion and the spiral part is a smooth transition; Alternatively, the connection between the protrusion and the spiral part is a stepped structure.

4. A variable cross-section spiral pipe pile with anti-torsion component according to claim 1, characterized in that: The columnar portion also includes a transition plate, which is installed at one end of the end plate and / or between the two ends of the pile body, and the central through hole is also formed on the transition plate.

5. A variable cross-section spiral pipe pile with anti-torsional components according to claim 4, characterized in that: The reinforcing cage includes longitudinal reinforcing bars and stirrups. The longitudinal reinforcing bars are elongated and the stirrups are circular. The longitudinal reinforcing bars are arranged in a circular pattern. The central axis of the stirrups coincides with the central axis of the pile body. The stirrups and the longitudinal reinforcing bars are fixedly connected. The axis of the longitudinal reinforcing bars and the central axis of the stirrups are parallel to each other. At least one transition plate is fixedly installed on the pile body and the longitudinal reinforcing bars pass through the transition plate on the pile body.

6. A variable cross-section spiral pipe pile with anti-torsion component according to claim 5, characterized in that: The two ends of the longitudinal reinforcing bars are respectively fixedly connected to the end plates at both ends of the pile body.

7. A variable cross-section spiral pipe pile with anti-torsion component according to claim 5, characterized in that: The steel cage also includes longitudinal reinforcing bars, which are arranged alternately with the longitudinal steel bars. The two ends of the longitudinal reinforcing bars are fixedly connected to the end plates at both ends of the pile body.

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