An ultra-large-diameter uHPC pipe pile

Abstract

The utility model provides a kind of super diameter UHPC pipe pile, the super diameter UHPC pipe pile includes pipe pile body, the outer diameter of pipe pile body is 2.5-4.0 meters, from outside to inside is sequentially arranged outer anticorrosive layer, UHPC matrix layer and inner layer reinforcing layer;The flange connecting disc is equipped at both ends of pipe pile body, bolt hole of flange connecting disc is inlaid with elastic sealing sleeve, outer periphery is covered with weather alloy protective ring, and weather alloy protective ring is seamlessly joined with outer anticorrosive layer by hot melt adhesive.UHPC matrix layer is higher than ordinary concrete in compressive strength, screw steel strand and longitudinal reinforcement net synergistic effect, bending capacity is promoted, elastic sealing sleeve blocks moisture intrusion bolt hole, and weather alloy protective ring is seamlessly joined with anticorrosive layer, and service life is high.

Description

Technical Field

[0001] This utility model belongs to the field of pipe pile technology, specifically relating to an ultra-large diameter UHPC pipe pile. Background Technology

[0002] Traditional large-diameter concrete pipe piles are widely used in marine engineering, cross-sea bridges and deep foundation construction, but the following technical bottlenecks still exist: conventional anti-corrosion coatings are susceptible to seawater erosion and chloride ion penetration, leading to steel corrosion and concrete spalling, which shortens the service life; ordinary concrete cannot meet the high load requirements of ultra-large diameter pipe piles and is prone to cracking due to uneven foundation settlement or impact loads; the bottom of the pipe pile is rubbed against rocks or gravel, causing the surface of traditional concrete to wear out quickly and requiring frequent maintenance. Utility Model Content

[0003] The main purpose of this utility model is to provide an ultra-large diameter UHPC pipe pile, which significantly improves the durability, bearing capacity and intelligence level of the pipe pile through material composite, structural optimization and intelligent monitoring technology, and solves the key defects of traditional technology.

[0004] To achieve the above objectives, this utility model provides an ultra-large diameter UHPC pipe pile, which includes a pipe pile body with an outer diameter of 2.5-4.0 meters. From the outside to the inside, the pipe pile body is sequentially composed of an outer anti-corrosion layer, a UHPC matrix layer, and an inner reinforcement layer. The UHPC matrix layer has a concrete compressive strength ≥150MPa and a permeability grade ≥P12. The inner reinforcement layer is composed of a prestressed steel strand skeleton and a longitudinally distributed high-strength steel mesh. The prestressed steel strand skeleton has a spiral winding structure with a pitch of 1 / 10-1 / 8 of the pipe pile's outer diameter. Flange connecting plates are provided at both ends of the pipe pile body. Elastic sealing sleeves are embedded in the bolt holes of the flange connecting plates, and a weather-resistant alloy protective ring is wrapped around the outer periphery. The weather-resistant alloy protective ring is seamlessly bonded to the outer anti-corrosion layer using hot melt adhesive.

[0005] The ultra-large diameter UHPC pipe pile provided by this utility model has a higher compressive strength of UHPC matrix layer than ordinary concrete. The spiral steel strands and longitudinal steel mesh work together to improve the bending bearing capacity. The elastic sealing sleeve prevents moisture from entering the bolt hole. The weather-resistant alloy protective ring is seamlessly connected to the anti-corrosion layer, resulting in a long protection life.

[0006] In one possible implementation, the outer anti-corrosion layer is a polyurea-nano-ceramic composite coating with a thickness of 3-5 mm and a corrugated flow channel on its surface. The flow channel has a depth of 2-3 mm, a width of 5-8 mm, and a spacing of 20-30 mm. The nano-ceramic particles filling the polyurea coating improve its resistance to chloride ion penetration, while the corrugated flow channel disperses the impact force of water flow, reduces eddy current vibration, and extends the coating's lifespan.

[0007] In one possible implementation, the high-strength steel mesh of the inner reinforcing layer is formed by interlacing HRB600 grade steel bars with a mesh spacing of 150-200 mm. The outer surface of the longitudinal steel bars is coated with a graphene epoxy anti-corrosion coating with a thickness of 50-80 μm. HRB600 steel bars have high shear strength, and the graphene coating forms a dense barrier to prevent steel bar rust expansion from causing concrete cracking.

[0008] In one possible implementation, the back of the flange connection disc is provided with annular reinforcing ribs. The reinforcing ribs have a trapezoidal cross-section, a height of 1 / 3 to 1 / 2 of the flange thickness, and a rib spacing of 1 / 12 to 1 / 10 of the flange diameter. Carbon fiber reinforcing strips are pre-embedded within the reinforcing ribs. The reinforcing ribs disperse the bolt preload stress, reducing local stress peaks; the carbon fiber strips improve the flange's bending stiffness, extending its service life under cyclic loads.

[0009] In one possible implementation, the bottom of the pipe pile body is provided with a tapered enlarged end, the outer surface of which is covered with a tungsten carbide wear-resistant layer with a thickness of 8-12 mm, and the interior of the enlarged end is filled with ultra-high toughness concrete, wherein steel fibers are incorporated into the concrete at a dosage of 120-150 kg / m. 3 Tungsten carbide wear-resistant layers have high hardness and good impact resistance and toughness.

[0010] In one possible implementation, a micro-sensor array is uniformly distributed within the UHPC matrix layer. This sensor array includes strain sensors, temperature sensors, and humidity sensors, and is connected to a data interface at the top of the pipe pile via pre-embedded wires. The sensors provide high accuracy, enabling real-time feedback on pipe pile stress distribution, temperature gradients, and leakage risks, supporting big data analysis and early warning systems. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of an ultra-large diameter UHPC 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 an ultra-large diameter UHPC pipe pile structure provided by this utility model, as shown below. Figure 1 As shown, the present invention provides an ultra-large diameter UHPC pipe pile, comprising a pipe pile body 1 with an outer diameter of 2.5-4.0 meters, and consisting of an outer anti-corrosion layer 2, a UHPC matrix layer 3, and an inner reinforcing layer 4 arranged sequentially from the outside to the inside; the UHPC matrix layer 3 has a concrete compressive strength ≥150MPa and a permeability grade ≥P12; the inner reinforcing layer 4 is composed of a prestressed steel strand skeleton and a longitudinally distributed high-strength steel mesh, the prestressed steel strand skeleton having a spiral winding structure with a pitch of 1 / 10-1 / 8 of the outer diameter of the pipe pile; flange connecting plates 5 are provided at both ends of the pipe pile body 1, the bolt holes of the flange connecting plates 5 are embedded with elastic sealing sleeves 6, and the outer periphery is covered with a weather-resistant alloy protective ring, the weather-resistant alloy protective ring being seamlessly bonded to the outer anti-corrosion layer 2 by hot melt adhesive.

[0016] The ultra-large diameter UHPC pipe pile provided by this utility model has a higher compressive strength of UHPC matrix layer 3 compared to ordinary concrete. The spiral steel strands and longitudinal steel mesh work together to improve the bending bearing capacity. The elastic sealing sleeve 6 prevents moisture from entering the bolt hole. The weather-resistant alloy protective ring is seamlessly connected to the anti-corrosion layer, resulting in a long protection life.

[0017] In one possible implementation, the outer anti-corrosion layer 2 is a polyurea-nano-ceramic composite coating with a thickness of 3-5 mm and a corrugated flow channel on its surface. The flow channel has a depth of 2-3 mm, a width of 5-8 mm, and a spacing of 20-30 mm. The nano-ceramic particles filling the polyurea coating improve its resistance to chloride ion penetration, while the corrugated flow channel disperses the impact force of water flow, reduces eddy current vibration, and extends the coating's lifespan.

[0018] In one possible implementation, the high-strength steel mesh of the inner reinforcing layer 4 is formed by interlacing HRB600 grade steel bars with a mesh spacing of 150-200 mm. The outer surface of the longitudinal steel bars is coated with a graphene epoxy anti-corrosion coating with a thickness of 50-80 μm. HRB600 steel bars have high shear strength, and the graphene coating forms a dense barrier to prevent steel bar rust expansion from causing concrete cracking.

[0019] In one possible implementation, the back of the flange connecting plate 5 is provided with annular reinforcing ribs 7. The cross-section of the reinforcing ribs is trapezoidal, the height is 1 / 3 to 1 / 2 of the flange thickness, and the rib spacing is 1 / 12 to 1 / 10 of the flange diameter. Carbon fiber reinforcing strips are pre-embedded in the reinforcing ribs. The reinforcing ribs disperse the bolt preload stress, reducing the local stress peak; the carbon fiber strips improve the bending stiffness of the flange and extend its service life under cyclic loads.

[0020] In one possible implementation, the bottom of the pipe pile body 1 is provided with a tapered enlarged end, the outer surface of which is covered with a tungsten carbide wear-resistant layer with a thickness of 8-12 mm, and the interior of the enlarged end is filled with ultra-high toughness concrete, wherein steel fibers are incorporated into the concrete at a dosage of 120-150 kg / m. 3 Tungsten carbide wear-resistant layers have high hardness and good impact resistance and toughness.

[0021] In one possible implementation, a micro-sensor array is uniformly distributed within the UHPC matrix layer 3. This sensor array includes strain sensors, temperature sensors, and humidity sensors, and is connected to a data interface at the top of the pipe pile via pre-embedded wires. The sensors provide high accuracy, enabling real-time feedback on the pipe pile's stress distribution, temperature gradient, and leakage risk, supporting big data analysis and early warning systems.

[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 type of ultra-large diameter UHPC pipe pile, characterized in that, The system includes a pipe pile body with an outer diameter of 2.5-4.0 meters. From the outside in, it consists of an outer anti-corrosion layer, a UHPC matrix layer, and an inner reinforcement layer. The UHPC matrix layer has a concrete compressive strength ≥150MPa and a permeability grade ≥P12. The inner reinforcement layer is composed of a prestressed steel strand skeleton and a longitudinally distributed high-strength steel mesh. The prestressed steel strand skeleton has a spiral winding structure with a pitch of 1 / 10-1 / 8 of the pipe pile's outer diameter. Flange connecting plates are provided at both ends of the pipe pile body. Elastic sealing sleeves are embedded in the bolt holes of the flange connecting plates, and a weather-resistant alloy protective ring is wrapped around the outer perimeter. The weather-resistant alloy protective ring is seamlessly bonded to the outer anti-corrosion layer using hot melt adhesive.

2. The ultra-large diameter UHPC pipe pile according to claim 1, characterized in that, The outer anti-corrosion layer is a polyurea-nano-ceramic composite coating with a thickness of 3-5mm. The surface is provided with wavy guide grooves with a depth of 2-3mm, a width of 5-8mm, and a groove spacing of 20-30mm.

3. The ultra-large diameter UHPC pipe pile according to claim 2, characterized in that, The high-strength steel mesh of the inner reinforcing layer is made of HRB600 grade steel bars welded in a crisscross pattern with a mesh spacing of 150-200mm. The outer surface of the longitudinal steel bars in the high-strength steel mesh is coated with a graphene epoxy anti-corrosion coating with a coating thickness of 50-80μm.

4. The ultra-large diameter UHPC pipe pile according to claim 3, characterized in that, The back of the flange connecting plate is provided with annular reinforcing ribs. The cross-section of the reinforcing ribs is trapezoidal, the height is 1 / 3 to 1 / 2 of the flange thickness, the rib spacing is 1 / 12 to 1 / 10 of the flange diameter, and carbon fiber reinforcing strips are pre-embedded in the reinforcing ribs.

5. The ultra-large diameter UHPC pipe pile according to claim 4, characterized in that, The bottom of the pipe pile body is provided with a tapered enlarged end. The outer surface of the enlarged end is covered with a tungsten carbide wear-resistant layer with a thickness of 8-12mm, and the interior of the enlarged end is filled with ultra-high toughness concrete. The concrete contains steel fibers at a dosage of 120-150kg / m. 3 .

6. The ultra-large diameter UHPC pipe pile according to claim 5, characterized in that, The UHPC matrix layer contains a uniformly distributed array of micro sensors, including strain sensors, temperature sensors, and humidity sensors, which are connected to the data interface at the top of the pipe pile via pre-embedded wires.

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