Stable grip type concrete pipe pile
By designing structures such as conical tips, spiral grooves, trapezoidal protrusions, and longitudinal main reinforcements on concrete pipe piles, the problem of easy slippage and damage of traditional concrete pipe piles in soft soil has been solved, achieving efficient penetration and improved resistance to displacement, thereby enhancing the bearing capacity and safety of the pile foundation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG ZHENGDA PIPE PILE CO LTD
- Filing Date
- 2025-06-14
- Publication Date
- 2026-06-26
AI Technical Summary
Traditional concrete pipe piles are prone to slipping or shifting in soft soil, sandy or gravelly strata, and are easily damaged at the bottom. The simple reinforcement configuration is difficult to resist complex stresses, which affects the bearing capacity and safety of the pile foundation.
The tapered tip design, combined with spiral grooves, trapezoidal protrusions on the outer wall, and longitudinal main reinforcement, enhances the interlocking force between the pipe pile and the soil and its resistance to displacement. The internal reinforcing core and annular reinforcing ribs form a three-dimensional skeleton to disperse impact force, and the outer wall is covered with a wear-resistant rubber layer to improve friction. The flange enables quick locking.
It significantly improves the penetration efficiency and displacement resistance of pipe piles, enhances connection reliability, prevents construction deviation and concrete wear, and improves the bearing capacity and safety of pile foundations.
Smart Images
Figure CN224412510U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a stable ground-gripping concrete pipe pile, specifically a stable ground-gripping concrete pipe pile. Background Technology
[0002] Concrete pipe piles are widely used in building foundations, bridge pile foundations, wharf engineering, and other fields. Their stability directly affects the bearing capacity and safety of the engineering structure. Traditional concrete pipe piles have the following technical defects: the bottom of ordinary pipe piles is mostly flat or simple conical, which makes them prone to slipping or shifting in soft soil, sandy soil, or gravelly soil, resulting in a decrease in the bearing capacity of the pile foundation; the bottom of the pipe pile is prone to damage due to concentrated impact force when penetrating hard soil layers; and the reinforcement configuration is simple and difficult to resist complex stresses. Utility Model Content
[0003] The main purpose of this utility model is to provide a stable gripping concrete pipe pile that significantly improves the penetration efficiency, displacement resistance and connection reliability of the pipe pile by optimizing the bottom gripping structure, the outer wall texture design and the internal reinforcement scheme.
[0004] To achieve the above objectives, this utility model provides a stable ground-gripping concrete pipe pile, which includes a pipe pile body, cast from C50 or higher strength concrete, with an outer diameter of 0.8-1.5 meters and a wall thickness of 100-250 mm; a ground-gripping part, located at the bottom end of the pipe pile body, the ground-gripping part being a conical tip with a spiral groove on the tip surface, the groove depth being 10-30 mm and the pitch being 50-150 mm; longitudinal main reinforcement, evenly distributed along the circumference of the inner wall of the pipe pile body, the longitudinal main reinforcement being HRB400 grade steel bars, with a diameter of 20-32 mm and a spacing of 80-150 mm; and ground-gripping texture on the outer wall, distributed axially along the outer surface of the pipe pile body, the texture being trapezoidal protrusions with a height of 5-15 mm, a width of 20-50 mm, and a spacing of 30-80 mm between adjacent protrusions.
[0005] This utility model provides a stable, gripping concrete pipe pile. The high-strength concrete and reasonable wall thickness design balance the lightweight and load-bearing requirements of the pipe pile, making it suitable for medium and large-scale projects. The conical tip combined with the spiral groove forms a "drill bit effect," reducing penetration resistance and enhancing the interlocking between the pipe pile and the soil to prevent construction deviation. The trapezoidal protrusions on the outer wall significantly increase surface roughness, improving the static friction between the pipe pile and the surrounding soil and suppressing horizontal displacement. The densely distributed longitudinal main reinforcement strengthens the axial compressive strength, preventing the pipe pile from crushing under vertical loads.
[0006] In one possible implementation, the conical tip of the gripping section is embedded with a steel reinforcing core. This reinforcing core is a cross-shaped steel plate, 10-20 mm thick, extending at least 500 mm into the pile body. The cross-shaped steel plate embedded in the tip core significantly improves the gripping section's impact and bending resistance, preventing tip breakage caused by gravel or hard soil layers. The reinforcing core extends into the pile body, dispersing impact forces to the pile body and preventing stress concentration that could lead to concrete cracking.
[0007] In one possible implementation, the trapezoidal raised surface of the outer wall's gripping texture is covered with a wear-resistant rubber layer, the rubber layer being 3-8 mm thick, and its surface has serrated anti-slip grooves. The rubber layer buffers external vibrations or impacts, protecting the concrete surface from wear, while the serrated grooves further increase the coefficient of friction with the soil. Especially in water-bearing strata, the rubber layer can absorb mud to form an "adhesive effect," enhancing anti-slip capability.
[0008] In one possible implementation, the inner wall of the pipe pile body is provided with annular reinforcing ribs. The reinforcing ribs are equidistantly distributed along the axial direction, with a spacing of 1-2 meters, a rib height of 30-60 mm, and a rib width of 20-40 mm. The reinforcing ribs are fixed to the longitudinal main reinforcement by welding. The annular reinforcing ribs and the longitudinal main reinforcement form a "three-dimensional skeleton," which improves the radial bending stiffness of the pipe pile and suppresses deformation caused by lateral earth pressure.
[0009] In one possible implementation, the top of the pipe pile body is provided with a flange connecting plate. The flange plate has annularly distributed bolt holes with a diameter of 25-40 mm and a spacing of 80-150 mm. The edge of the flange plate is provided with a guide boss with a height of 10-20 mm for precise docking with adjacent pipe pile flanges. The flange plate enables rapid locking of multiple pipe pile sections via bolts, and the guide boss precisely positions the docking points, reducing construction errors. Attached Figure Description
[0010] Figure 1 This is a schematic diagram of a stable, gripping concrete pipe pile structure provided by this utility model. Detailed Implementation
[0011] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. The basic principles of the present invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.
[0012] In the description of this application, it should be understood that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0013] In the description of this application, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.
[0014] See attached diagram. Figure 1 , Figure 1 This is a schematic diagram of a stable, gripping concrete pipe pile structure provided by this utility model, as shown below. Figure 1 As shown, the present invention provides a stable ground-gripping concrete pipe pile, comprising a pipe pile body 1, which is cast from concrete of strength grade C50 or above, with an outer diameter of 0.8-1.5 meters and a wall thickness of 100-250 mm; a ground-gripping part 2, which is set at the bottom end of the pipe pile body 1, the ground-gripping part 2 being a conical tip with a spiral groove on the tip surface, the groove depth being 10-30 mm and the pitch being 50-150 mm; longitudinal main reinforcement 3, which is evenly distributed along the circumference of the inner wall of the pipe pile body 1, the longitudinal main reinforcement 3 being HRB400 grade steel bars with a diameter of 20-32 mm and a spacing of 80-150 mm; and outer wall ground-gripping texture 4, which is axially distributed along the outer surface of the pipe pile body 1, the texture being trapezoidal protrusions with a height of 5-15 mm, a width of 20-50 mm, and a spacing of 30-80 mm between adjacent protrusions.
[0015] This utility model provides a stable, gripping concrete pipe pile. The high-strength concrete and reasonable wall thickness design balance the lightweight and load-bearing requirements of the pipe pile, making it suitable for medium and large-scale projects. The conical tip combined with the spiral groove forms a "drill bit effect," reducing penetration resistance and enhancing the interlocking between the pipe pile and the soil to prevent construction deviation. The trapezoidal protrusions on the outer wall significantly increase surface roughness, enhancing the static friction between the pipe pile and the surrounding soil and suppressing horizontal displacement. The densely distributed longitudinal main reinforcement enhances axial compressive strength, preventing the pipe pile from crushing under vertical loads.
[0016] In one possible implementation, a steel reinforcing core 5 is embedded inside the conical tip of the gripping part 2. The reinforcing core 5 is a cross-shaped steel plate with a thickness of 10-20 mm, extending into the interior of the pipe pile body 1 for a length of not less than 500 mm. The cross-shaped steel plate embedded in the tip core significantly improves the impact resistance and bending resistance of the gripping part 2, preventing tip breakage caused by gravel or hard soil layers. The reinforcing core 5 extends into the interior of the pipe pile, dispersing the impact force to the pipe pile body 1 and preventing stress concentration that could lead to concrete cracking.
[0017] In one possible implementation, the trapezoidal raised surface of the outer wall grip texture 4 is covered with a wear-resistant rubber layer, the rubber layer being 3-8 mm thick, and the surface having serrated anti-slip grooves. The rubber layer buffers external vibrations or impacts, protecting the concrete surface from wear, and the serrated grooves further increase the coefficient of friction with the soil. Especially in water-bearing strata, the rubber layer can absorb mud to form an "adhesive effect," enhancing anti-slip capability.
[0018] In one possible implementation, the inner wall of the pipe pile body 1 is provided with annular reinforcing ribs 6. The reinforcing ribs are equidistantly distributed along the axial direction, with a spacing of 1-2 meters, a rib height of 30-60 mm, and a rib width of 20-40 mm. The reinforcing ribs are fixed to the longitudinal main reinforcement 3 by welding. The annular reinforcing ribs 6 and the longitudinal main reinforcement 3 form a "three-dimensional skeleton", which improves the radial bending stiffness of the pipe pile and suppresses deformation caused by lateral earth pressure.
[0019] In one possible implementation, the top of the pipe pile body 1 is provided with a flange connecting plate 7. The flange has annularly distributed bolt holes with a diameter of 25-40 mm and a spacing of 80-150 mm. The flange edge is provided with a guide boss with a height of 10-20 mm for precise docking with adjacent pipe pile flanges. The flange enables rapid locking of multiple pipe pile sections via bolts, and the guide boss precisely positions the docking points, reducing construction errors.
[0020] It is worth mentioning that those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A stable, gripping concrete pipe pile, characterized in that, include: The pipe pile body is made of C50 or higher strength concrete, with an outer diameter of 0.8-1.5 meters and a wall thickness of 100-250 millimeters; The ground gripping part is located at the bottom end of the pipe pile body. The ground gripping part has a conical tip with a spiral groove on the surface of the tip. The groove depth is 10-30 mm and the pitch is 50-150 mm. Longitudinal main reinforcement is evenly distributed along the circumference of the inner wall of the pipe pile body. The longitudinal main reinforcement is HRB400 grade steel bar with a diameter of 20-32 mm and a spacing of 80-150 mm. The outer wall gripping texture is distributed axially along the outer surface of the pipe pile body. The texture is a trapezoidal protrusion with a height of 5-15 mm, a width of 20-50 mm, and a spacing of 30-80 mm between adjacent protrusions.
2. The stable ground-gripping concrete pipe pile according to claim 1, characterized in that, The cone-shaped tip of the gripping part is embedded with a steel reinforcing core. The reinforcing core is a cross-shaped steel plate with a thickness of 10-20 mm, extending into the interior of the pipe pile body for a length of not less than 500 mm.
3. The stable ground-gripping concrete pipe pile according to claim 2, characterized in that, The trapezoidal raised surface of the outer wall grip texture is covered with a wear-resistant rubber layer with a thickness of 3-8 mm and a serrated anti-slip groove on the surface.
4. The stable ground-gripping concrete pipe pile according to claim 3, characterized in that, The inner wall of the pipe pile body is provided with annular reinforcing ribs. The reinforcing ribs are equidistantly distributed along the axial direction with a spacing of 1-2 meters. The rib height is 30-60 mm and the rib width is 20-40 mm. The reinforcing ribs are fixed to the longitudinal main reinforcement by welding.
5. The stable ground-gripping concrete pipe pile according to claim 4, characterized in that, The top of the pipe pile body is provided with a flange, and the flange is provided with annularly distributed bolt holes with a diameter of 25-40 mm and a spacing of 80-150 mm. The flange edge is provided with a guide boss with a height of 10-20 mm, which is used for precise docking with the flange of the adjacent pipe pile.