Mixed reinforced concrete pile

Abstract

The utility model provides a mixed reinforced concrete pile which comprises a pile body, the pile body is formed by pouring concrete, a mixed reinforced structure is arranged in the pile body, and the mixed reinforced structure comprises a spiral prestressed steel strand and a longitudinally distributed common reinforcing mesh; the spiral prestressed steel strand is spirally wound along the axial direction of the pile body; the common reinforcing mesh is formed by welding HRB400-grade reinforcing steel bars in a criss-cross manner; the outer surface of the pile body is coated with an anti-corrosion coating, and the anti-corrosion coating is seamlessly bonded with pile body concrete. Flange connecting discs are arranged at the top and the bottom of the pile body respectively, elastic sealing sleeves are embedded in bolt holes of the flange connecting discs, and stainless steel protection rings wrap the peripheries of the flange connecting discs. A mixed reinforcement structure is arranged in the pile body of the mixed reinforcement concrete pile, and the spiral steel strand provides circumferential pre-compressive stress to inhibit concrete cracking; a common reinforcing mesh enhances axial tensile strength and adapts to complex loads, and an anti-corrosion coating blocks chloride ion permeation; the elastic sealing sleeve and the stainless steel protection ring protect the flange connecting part, and the protection life is long.

Description

Technical Field

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

[0002] Traditional concrete piles have the following problems when used in complex geological conditions or highly corrosive environments: Insufficient crack resistance and bearing capacity: Single-reinforcement structures (such as those using only ordinary steel bars or prestressed steel strands) cannot simultaneously achieve bending, shear, and tensile strength, and are prone to cracking due to uneven foundation settlement or impact loads; Poor corrosion resistance: Conventional anti-corrosion coatings have weak adhesion and are easily affected by groundwater and salt penetration, leading to steel corrosion and concrete spalling; Prone to failure at connection points: Insufficient sealing of flange bolt holes allows moisture to seep in, causing corrosion and reducing structural stability. Utility Model Content

[0003] The main purpose of this utility model is to provide a hybrid reinforced concrete pile, which significantly improves crack resistance, corrosion resistance and durability through the synergistic reinforcement of spiral prestressed steel strands and ordinary steel mesh, composite anti-corrosion coating and modular reinforcement design, and is suitable for high-requirement scenarios such as marine engineering and bridge foundations.

[0004] To achieve the above objectives, this utility model provides a hybrid reinforced concrete pile, which includes a pile body made of cast concrete. The pile body has a hybrid reinforcement structure inside, which includes spiral prestressed steel strands and longitudinally distributed ordinary steel mesh. The spiral prestressed steel strands are spirally wound along the pile body axis, with a pitch of 1 / 8 to 1 / 6 of the pile body diameter. The ordinary steel mesh is made of HRB400 grade steel bars welded in a crisscross pattern, with a mesh spacing of 100-150 mm. The outer surface of the pile body is covered with an anti-corrosion coating with a thickness of 2-4 mm, which is seamlessly bonded to the pile body concrete. The top and bottom of the pile body are respectively provided with flange connecting plates, and the bolt holes of the flange connecting plates are embedded with elastic sealing sleeves and covered with stainless steel protective rings.

[0005] The hybrid reinforced concrete pile provided by this utility model has a hybrid reinforcement structure inside the pile body. The spiral steel strand provides circumferential prestress to inhibit concrete cracking; ordinary steel mesh enhances axial tensile strength to adapt to complex loads; anti-corrosion coating blocks chloride ion penetration; and the flange connection part is protected by a double protection of elastic sealing sleeve and stainless steel protective ring, resulting in a long protection life.

[0006] In one possible implementation, the anti-corrosion coating is a polyurethane-glass flake composite coating with a uniformly distributed micron-level texture on its surface. The texture has a depth of 0.1-0.3 mm, a width of 1-2 mm, and a spacing of 5-10 mm. The texture increases the contact area between the coating and the concrete, while the glass flakes block corrosive media.

[0007] In one possible implementation, the diameter of the spiral prestressed steel strand is 12-16 mm, and its surface is coated with an epoxy zinc-rich anti-corrosion layer with a coating thickness of 60-100 μm; the outer surface of the longitudinal reinforcing bars of the ordinary steel mesh is coated with a graphene-modified epoxy coating with a coating thickness of 50-80 μm. The epoxy zinc-rich layer provides sacrificial anode protection, delaying the corrosion of the steel strand; the graphene-modified coating fills the microcracks on the surface of the reinforcing bars, preventing moisture penetration.

[0008] In one possible implementation, the back of the flange connection plate is provided with radial reinforcing ribs. The reinforcing ribs have a trapezoidal cross-section, a height of 1 / 4 to 1 / 3 of the flange thickness, and a rib spacing of 1 / 10 to 1 / 8 of the flange diameter. Carbon fiber reinforcing strips are pre-embedded within the reinforcing ribs. The reinforcing ribs uniformly transmit the bolt preload to the flange plate, and the carbon fiber strips enhance the bending stiffness.

[0009] In one possible implementation, the bottom of the pile is provided with a tapered reinforcing end, the outer surface of which is covered with a silicon carbide wear-resistant layer with a thickness of 6-10 mm, and the interior of the reinforcing end is filled with steel fiber reinforced concrete with a steel fiber content of 100-130 kg / m³. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of a mixed reinforced concrete 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 hybrid reinforced concrete pile structure provided by this utility model, as shown below. Figure 1 As shown, the present invention provides a hybrid reinforced concrete pile including a pile body 1, which is made of cast concrete and has a hybrid reinforcement structure inside. The hybrid reinforcement structure includes spiral prestressed steel strands 2 and longitudinally distributed ordinary steel mesh 3. The spiral prestressed steel strands 2 are spirally wound along the axial direction of the pile body 1, with a pitch of 1 / 8 to 1 / 6 of the diameter of the pile body 1. The ordinary steel mesh 3 is made of HRB400 grade steel bars welded in a crisscross pattern, with a mesh spacing of 100-150mm. The outer surface of the pile body 1 is covered with an anti-corrosion coating 4, which has a thickness of 2-4mm and is seamlessly bonded to the concrete of the pile body 1. The top and bottom of the pile body 1 are respectively provided with flange connecting plates 5, and the bolt holes of the flange connecting plates 5 are embedded with elastic sealing sleeves and covered with stainless steel protective rings.

[0015] The hybrid reinforced concrete pile provided by this utility model has a hybrid reinforcement structure inside the pile body 1. The spiral steel strand 2 provides circumferential prestress to inhibit concrete cracking; the ordinary steel mesh 3 enhances the axial tensile strength to adapt to complex loads; the anti-corrosion coating 4 blocks chloride ion penetration; and the flange connection part is protected by a double protection of elastic sealing sleeve and stainless steel protective ring, which has a long protection life.

[0016] In one possible implementation, the anti-corrosion coating 4 is a polyurethane-glass flake composite coating with micron-level uneven textures uniformly distributed on its surface. The depth of the uneven textures is 0.1-0.3 mm, the width is 1-2 mm, and the texture spacing is 5-10 mm. The uneven textures increase the contact area between the coating and the concrete, while the glass flakes block corrosive media.

[0017] In one possible implementation, the spiral prestressed steel strand 2 has a diameter of 12-16 mm and its surface is coated with an epoxy zinc-rich anti-corrosion layer with a coating thickness of 60-100 μm; the outer surface of the longitudinal reinforcing bars of the ordinary steel mesh 3 is coated with a graphene-modified epoxy coating with a coating thickness of 50-80 μm. The epoxy zinc-rich layer provides sacrificial anode protection, delaying the corrosion of the steel strand 2; the graphene-modified coating fills the microcracks on the surface of the reinforcing bars, preventing moisture penetration.

[0018] In one possible implementation, the back of the flange connecting plate 5 is provided with radial reinforcing ribs. The cross-section of the reinforcing ribs is trapezoidal, the height is 1 / 4 to 1 / 3 of the flange thickness, and the rib spacing is 1 / 10 to 1 / 8 of the flange diameter. Carbon fiber reinforcing strips are pre-embedded in the reinforcing ribs. The reinforcing ribs uniformly transmit the bolt preload to the flange, and the carbon fiber strips improve the bending stiffness.

[0019] In one possible implementation, the bottom of the pile body 1 is provided with a tapered reinforcing end 6, the outer surface of the reinforcing end is covered with a silicon carbide wear-resistant layer with a thickness of 6-10mm, and the interior of the reinforcing end is filled with steel fiber reinforced concrete with a steel fiber content of 100-130kg / m³.

[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 type of mixed-reinforced concrete pile, characterized in that, The pile includes a concrete pile body with a mixed reinforcement structure inside. This structure comprises spiral prestressed steel strands and longitudinally distributed ordinary steel mesh. The spiral prestressed steel strands are spirally wound along the pile body's axial direction with a pitch of 1 / 8 to 1 / 6 of the pile diameter. The ordinary steel mesh is made of HRB400 grade steel bars welded together in a crisscross pattern with a mesh spacing of 100-150 mm. The pile body is covered with an anti-corrosion coating with a thickness of 2-4 mm, which is seamlessly bonded to the pile concrete. Flange connecting plates are provided at the top and bottom of the pile body, with elastic sealing sleeves embedded in the bolt holes of the flange connecting plates and stainless steel protective rings covering their outer perimeter.

2. The hybrid reinforced concrete pile according to claim 1, characterized in that, The anti-corrosion coating is a polyurethane-glass flake composite coating, with micron-level uneven textures evenly distributed on its surface. The depth of the uneven textures is 0.1-0.3 mm, the width is 1-2 mm, and the texture spacing is 5-10 mm.

3. The mixed-reinforced concrete pile according to claim 2, characterized in that, The diameter of the spiral prestressed steel strand is 12-16mm, and its surface is coated with an epoxy zinc-rich anti-corrosion layer with a coating thickness of 60-100μm; the outer surface of the longitudinal steel bars of the ordinary steel mesh is coated with a graphene-modified epoxy coating with a coating thickness of 50-80μm.

4. The hybrid reinforced concrete pile according to claim 3, characterized in that, The back of the flange connecting plate is provided with radial reinforcing ribs. The cross-section of the reinforcing ribs is trapezoidal, the height is 1 / 4 to 1 / 3 of the flange thickness, the rib spacing is 1 / 10 to 1 / 8 of the flange diameter, and carbon fiber reinforcing strips are pre-embedded in the reinforcing ribs.

5. The mixed-reinforced concrete pile according to claim 4, characterized in that, The bottom of the pile is provided with a conical reinforcing end. The outer surface of the reinforcing end is covered with a silicon carbide wear-resistant layer with a thickness of 6-10mm, and the interior of the reinforcing end is filled with steel fiber reinforced concrete with a steel fiber content of 100-130kg / m³.

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