High-protection concrete pipe pile

Abstract

The utility model provides a high protection concrete pipe pile which comprises a pipe pile body, an anti-seepage concrete layer, a fiber reinforced layer and an anti-corrosion coating are sequentially arranged on the outer wall of the pipe pile body from inside to outside, and a prestressed reinforcement framework is arranged in the axial center of the pipe pile body. The prestressed reinforcement framework is composed of a plurality of spirally-wound prestressed steel strands and vertically-distributed longitudinal reinforcing ribs, flange connecting discs are arranged at the two ends of the pipe pile body respectively, the peripheries of the flange connecting discs are wrapped with annular protective sleeves, and the annular protective sleeves are in seamless connection with the anti-corrosion coating. According to the high-protection concrete pipe pile provided by the utility model, the impermeability, the crack resistance and the corrosion resistance of the pipe pile are remarkably improved through the three-layer composite design of the impermeable concrete layer, the fiber reinforcement layer and the anti-corrosion coating. The annular protective sleeve of the flange connecting disc is in seamless connection with the anti-corrosion coating, and corrosion weak points are prevented from being formed in the connecting position.

Description

Technical Field

[0001] This utility model belongs to the field of concrete pipe pile technology, specifically relating to a high-protection concrete pipe pile. Background Technology

[0002] When traditional concrete pipe piles are used in marine engineering, saline-alkali land and highly corrosive environments, they often face the following problems: the anti-corrosion layer on the surface of the pipe pile is easy to peel off; groundwater or salt penetration leads to steel corrosion and concrete cracking, shortening the service life; the single concrete layer has weak impact resistance and is prone to breakage under complex geological conditions; the flange bolt holes are prone to water seepage, accelerating local corrosion; and the bottom of the pipe pile is in contact with soil or rock, resulting in rapid material wear and frequent replacement. Utility Model Content

[0003] The main purpose of this utility model is to provide a high-protection concrete pipe pile, which significantly improves corrosion resistance, crack resistance and durability through a multi-layer composite protective structure, enhanced connection design and bottom wear-resistant optimization, making it suitable for long-term stable use in harsh environments.

[0004] To achieve the above objectives, this utility model provides a high-protection concrete pipe pile, which includes a pipe pile body. The outer wall of the pipe pile body is provided with an impermeable concrete layer, a fiber-reinforced layer, and an anti-corrosion coating from the inside to the outside. A prestressed steel reinforcement skeleton is provided at the axial center of the pipe pile body. The prestressed steel reinforcement skeleton is composed of multiple spirally wound prestressed steel strands and vertically distributed longitudinal reinforcing bars. Flange connecting plates are respectively provided at both ends of the pipe pile body. The outer periphery of the flange connecting plate is covered with an annular protective sleeve, and the annular protective sleeve is seamlessly connected to the anti-corrosion coating.

[0005] The high-protection concrete pipe pile provided by this utility model significantly improves the pipe pile's impermeability, crack resistance, and corrosion resistance through a three-layer composite design consisting of an impermeable concrete layer, a fiber reinforcement layer, and an anti-corrosion coating. The annular protective sleeve of the flange connection plate is seamlessly connected to the anti-corrosion coating, preventing the connection point from becoming a weak point for corrosion.

[0006] In one possible implementation, the fiber reinforcement layer is composed of alternating layers of carbon fiber mesh and epoxy resin composite layer. The carbon fiber mesh has a mesh density of 10-15 meshes / cm², and the epoxy resin composite layer has a thickness of 2-3 mm. The alternating laying of carbon fiber mesh and epoxy resin forms a high-strength and tough composite layer, effectively resisting external impacts and soil stress.

[0007] In one possible implementation, the anti-corrosion coating is a polyurethane-ceramic composite coating with a uniformly distributed honeycomb microporous structure on its surface. The pore size of the microporous structure is 0.1-0.5 mm, and the depth is 0.3-1 mm. The honeycomb microporous structure enhances the adhesion of the coating and, at the same time, buffers thermal expansion and contraction stress through the pores, extends the coating's lifespan.

[0008] In one possible implementation, a rubber sealing ring is embedded in the bolt holes of the flange connecting plate, and a stainless steel anti-rust bushing is provided on the outside of the rubber sealing ring. The anti-rust bushing is welded and fixed to the flange connecting plate. The design of the rubber sealing ring and stainless steel bushing in the bolt holes prevents moisture and corrosive media from entering the connection area.

[0009] In one possible implementation, the bottom of the pipe pile body is provided with a tapered reinforcing end, the outer surface of which is covered with a wear-resistant alloy layer with a thickness of 5-8 mm, and the joint between the wear-resistant alloy layer and the anti-corrosion coating is sealed with hot melt adhesive. The tapered reinforcing end combined with the wear-resistant alloy layer is suitable for complex geological conditions, and the hot melt adhesive seal ensures the continuity of the protective layer.

[0010] In one possible implementation, the spacing of the longitudinal stiffeners is 1 / 8 to 1 / 10 of the diameter of the pipe pile, and the outer surface of each longitudinal stiffener is coated with an epoxy zinc-rich primer. The epoxy zinc-rich primer protects the longitudinal stiffeners and prevents concrete spalling caused by steel corrosion. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of a high-protection concrete pipe pile structure provided by this utility model. Detailed Implementation

[0012] 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.

[0013] 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.

[0014] 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.

[0015] See attached diagram. Figure 1 , Figure 1 This is a schematic diagram of a high-protection concrete pipe pile structure provided by this utility model, as shown below. Figure 1 As shown, the present invention provides a high-protection concrete pipe pile including a pipe pile body 1. The outer wall of the pipe pile body 1 is provided with an impermeable concrete layer 2, a fiber-reinforced layer 3 and an anti-corrosion coating 4 from the inside to the outside. A prestressed steel reinforcement skeleton 5 is provided at the axial center of the pipe pile body 1. The prestressed steel reinforcement skeleton 5 is composed of multiple spirally wound prestressed steel strands and vertically distributed longitudinal reinforcing bars. Flange connecting plates 6 are respectively provided at both ends of the pipe pile body 1. The outer periphery of the flange connecting plate 6 is covered with an annular protective sleeve 7. The annular protective sleeve 7 is seamlessly connected to the anti-corrosion coating 4.

[0016] The high-protection concrete pipe pile provided by this utility model significantly improves the impermeability, crack resistance, and corrosion resistance of the pipe pile through a three-layer composite design consisting of an impermeable concrete layer 2, a fiber reinforcement layer 3, and an anti-corrosion coating 4. The annular protective sleeve 7 of the flange connecting plate 6 is seamlessly connected to the anti-corrosion coating 4, preventing the connection point from becoming a weak point for corrosion.

[0017] In one possible implementation, the fiber reinforcement layer 3 is composed of alternating layers of carbon fiber mesh and epoxy resin composite layer. The carbon fiber mesh has a mesh density of 10-15 meshes / cm², and the epoxy resin composite layer has a thickness of 2-3 mm. The alternating laying of carbon fiber mesh and epoxy resin forms a high-strength and tough composite layer, effectively resisting external impacts and soil stress.

[0018] In one possible implementation, the anti-corrosion coating 4 is a polyurethane-ceramic composite coating with a uniformly distributed honeycomb microporous structure on its surface. The pore size of the microporous structure is 0.1-0.5 mm, and the depth is 0.3-1 mm. The honeycomb microporous structure enhances the adhesion of the coating and, at the same time, buffers thermal expansion and contraction stress through the pores, extends the coating life.

[0019] In one possible implementation, a rubber sealing ring is embedded in the bolt holes of the flange connecting plate 6, and a stainless steel anti-rust bushing is provided on the outside of the rubber sealing ring. The anti-rust bushing is welded and fixed to the flange connecting plate 6. The design of the rubber sealing ring and stainless steel bushing in the bolt holes prevents moisture and corrosive media from entering the connection area.

[0020] In one possible implementation, the bottom of the pipe pile body 1 is provided with a tapered reinforcing end, the outer surface of which is covered with a wear-resistant alloy layer with a thickness of 5-8 mm, and the joint between the wear-resistant alloy layer and the anti-corrosion coating 4 is sealed with hot melt adhesive. The tapered reinforcing end combined with the wear-resistant alloy layer is suitable for complex geological conditions, and the hot melt adhesive seal ensures the continuity of the protective layer.

[0021] In one possible implementation, the spacing of the longitudinal stiffeners is 1 / 8 to 1 / 10 of the diameter of the pipe pile, and the outer surface of each longitudinal stiffener is coated with an epoxy zinc-rich primer. The epoxy zinc-rich primer protects the longitudinal stiffeners and prevents concrete spalling caused by steel corrosion.

[0022] 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 high-protection concrete pipe pile, characterized in that, The device includes a pipe pile body, the outer wall of which is provided with an impermeable concrete layer, a fiber-reinforced layer and an anti-corrosion coating from the inside to the outside. A prestressed steel reinforcement skeleton is provided at the axial center of the pipe pile body. The prestressed steel reinforcement skeleton is composed of multiple spirally wound prestressed steel strands and vertically distributed longitudinal reinforcing bars. Flange connecting plates are respectively provided at both ends of the pipe pile body. The outer periphery of the flange connecting plate is covered with an annular protective sleeve, which is seamlessly connected to the anti-corrosion coating.

2. The high-protection concrete pipe pile according to claim 1, characterized in that, The fiber reinforcement layer is composed of alternating layers of carbon fiber mesh and epoxy resin composite layer. The mesh density of the carbon fiber mesh is 10-15 mesh / cm², and the thickness of the epoxy resin composite layer is 2-3 mm.

3. The high-protection concrete pipe pile according to claim 2, characterized in that, The anti-corrosion coating is a polyurethane-ceramic composite coating, with a honeycomb microporous structure uniformly distributed on its surface. The pore size of the microporous structure is 0.1-0.5 mm and the depth is 0.3-1 mm.

4. The high-protection concrete pipe pile according to claim 3, characterized in that, The flange connecting plate has a rubber sealing ring embedded in its bolt holes, and a stainless steel anti-rust bushing is provided on the outside of the rubber sealing ring. The anti-rust bushing is welded and fixed to the flange connecting plate.

5. The high-protection concrete pipe pile according to claim 4, characterized in that, The bottom of the pipe pile body is provided with a conical reinforcing end, and the outer surface of the conical reinforcing end is covered with a wear-resistant alloy layer with a thickness of 5-8mm. The joint between the wear-resistant alloy layer and the anti-corrosion coating is sealed with hot melt adhesive.

6. The high-protection concrete pipe pile according to claim 5, characterized in that, The spacing of the longitudinal reinforcing bars is 1 / 8 to 1 / 10 of the diameter of the pipe pile, and the outer surface of each longitudinal reinforcing bar is coated with an epoxy zinc-rich primer layer.

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