Low-material-consumption steel bar pipe pile
By using differentiated concrete layer structure and spiral steel reinforcement skeleton design, the problems of high material cost and structural stability of traditional reinforced concrete pipe piles are solved, realizing a low-material-consumption and high-efficiency reinforced concrete pipe pile design.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG ZHENGDA PIPE PILE CO LTD
- Filing Date
- 2025-05-30
- Publication Date
- 2026-05-05
AI Technical Summary
Traditional reinforced concrete pipe piles are expensive and heavy, and the outer concrete layer is prone to corrosion and cracking. The steel reinforcement cage is also prone to peeling off from the concrete layer, which affects the structural stability.
The structure adopts a differentiated concrete layer structure. The outer layer is a high-strength thin-walled design, while the inner layer bears the main load. It forms a three-dimensional reinforcement system by combining a spiral steel skeleton and anchor bars. The outer layer focuses on corrosion protection, while the inner layer focuses on load bearing. It uses C50-C60 high-strength concrete and C30-C40 ordinary concrete. The inner layer concrete accounts for 60-70% of the total volume.
It significantly reduces material costs, improves structural stability, reduces the risk of outer layer corrosion and peeling, and forms an integral structure.
Smart Images
Figure CN224199896U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of pipe pile technology, specifically relating to a low-material-consumption steel pipe pile. Background Technology
[0002] Traditional reinforced concrete pipe piles mostly use homogeneous concrete structures, which have the following technical defects: In order to meet the load-bearing requirements, a single high-grade concrete and a densely packed steel cage design are usually used, resulting in high material costs and excessive self-weight. The outer concrete layer is prone to corrosion and cracking, requiring frequent maintenance. The traditional practice of thickening the protective layer further increases material consumption. The steel cage and concrete layer are prone to peeling and damage, affecting the overall structural stability. Utility Model Content
[0003] The main purpose of this utility model is to provide a low-material-consumption steel pipe pile. By setting a differentiated concrete layer structure, the outer layer adopts a high-strength thin-wall design to achieve corrosion resistance, while the inner layer bears the main load, which saves more materials compared with the traditional homogeneous structure.
[0004] To achieve the above objectives, this utility model provides a low-material-consumption reinforced concrete pipe pile, which includes an outer concrete protective layer, a composite reinforcement layer, and an inner concrete bearing layer arranged sequentially from the outside to the inside; the composite reinforcement layer includes a spirally wound steel reinforcement skeleton; the thickness of the outer concrete protective layer is 40-60% of the thickness of the inner concrete bearing layer, and the outer concrete protective layer and the inner concrete bearing layer form an integral structure through anchor bars.
[0005] This utility model provides a low-material-consumption steel pipe pile, which directly reduces the amount of high-strength concrete used by changing the thickness of the outer protective layer. The spiral steel reinforcement skeleton provides circumferential restraint force and forms a three-dimensional reinforcement system with the anchor bars. The outer layer focuses on corrosion protection and the inner layer focuses on load bearing, which saves more materials compared with the traditional homogeneous structure.
[0006] In one possible implementation, the steel reinforcement cage consists of main bars and stirrups. The diameter of the main bars is 20-30% larger than that of the stirrups, and the spacing between the main bars is 2-3 times the spacing between the stirrups. The larger diameter and wider spacing of the main bars, while reducing the total number of main bars, ensures longitudinal bending resistance. The smaller diameter stirrups are densely arranged to enhance the lateral restraint and shear resistance of the concrete.
[0007] In one possible implementation, the outer concrete protective layer is made of C50-C60 high-strength concrete, and the inner concrete load-bearing layer is made of C30-C40 ordinary concrete. The inner layer of C30-C40 concrete accounts for 60-70% of the total volume, significantly reducing material costs.
[0008] In one possible implementation, the anchor bars are Y-shaped, with their ends extending to the outer surface of the outer concrete protective layer to form anti-stripping protrusions. The Y-shaped bifurcation design increases the contact area of the anchor bars and improves the bonding strength.
[0009] In one possible implementation, the composite reinforcing layer incorporates steel fiber reinforcement, with the steel fibers having a length of 20-30 mm and an incorporation amount of 1.5-2.5% of the concrete volume. The incorporation of steel fibers reduces the amount of stirrups required while simultaneously improving impact toughness. Attached Figure Description
[0010] Figure 1 This is a schematic diagram of a low-material-consumption steel 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 low-material-consumption reinforced concrete pipe pile structure provided by this utility model, as shown below. Figure 1 As shown, the present invention provides a low-material-consumption reinforced concrete pipe pile comprising an outer concrete protective layer 1, a composite reinforcement layer 2, and an inner concrete bearing layer 3 arranged sequentially from the outside to the inside; the composite reinforcement layer 2 includes a spirally wound steel reinforcement skeleton 4; the thickness of the outer concrete protective layer 1 is 40-60% of the thickness of the inner concrete bearing layer, and the outer concrete protective layer 1 and the inner concrete bearing layer 3 form an integral structure through anchor bars 5.
[0015] This utility model provides a low-material-consumption steel pipe pile, which directly reduces the amount of high-strength concrete used by changing the thickness of the outer protective layer. The spiral steel reinforcement skeleton 4 provides circumferential restraint force and forms a three-dimensional reinforcement system with the anchor bars 5. The outer layer focuses on corrosion protection and the inner layer focuses on load bearing, which saves more materials compared with the traditional homogeneous structure.
[0016] In one possible implementation, the steel reinforcement cage 4 consists of main bars and stirrups. The diameter of the main bars is 20-30% larger than that of the stirrups, and the spacing between the main bars is 2-3 times the spacing between the stirrups. The larger diameter and wider spacing of the main bars (20-30% larger diameter and 2-3 times wider spacing) reduces the total number of main bars while ensuring longitudinal bending resistance. The smaller diameter stirrups are densely arranged to enhance the lateral restraint and shear resistance of the concrete.
[0017] In one possible implementation, the outer concrete protective layer 1 is made of C50-C60 high-strength concrete, and the inner concrete load-bearing layer 3 is made of C30-C40 ordinary concrete. The amount of C30-C40 concrete in the inner layer accounts for 60-70% of the total volume, significantly reducing material costs.
[0018] In one possible implementation, the anchor bars 5 are distributed in a Y-shape, with their ends extending to the outer surface of the outer concrete protective layer 1 to form anti-stripping protrusions. The Y-shaped bifurcation design increases the contact area of the anchor bars 5 and improves the bonding strength.
[0019] In one possible implementation, the composite reinforcing layer 2 incorporates steel fiber reinforcement material, with steel fibers having a length of 20-30 mm and an incorporation amount of 1.5-2.5% of the concrete volume. The incorporation of steel fibers can reduce the amount of stirrups used while simultaneously improving impact resistance.
[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 low-material-consumption reinforced concrete pipe pile, characterized in that, It includes an outer concrete protective layer, a composite reinforcement layer, and an inner concrete bearing layer arranged sequentially from the outside to the inside; the composite reinforcement layer contains a spirally wound steel reinforcement skeleton; the thickness of the outer concrete protective layer is 40-60% of the thickness of the inner concrete low-material-consumption steel pipe pile soil bearing layer, and the outer concrete protective layer and the inner concrete bearing layer form an integral structure through anchor bars.
2. The low-material-consumption reinforced concrete pipe pile according to claim 1, characterized in that, The steel reinforcement cage consists of main bars and stirrups. The diameter of the main bars is 20-30% larger than that of the stirrups, and the spacing between the main bars is 2-3 times that of the stirrup spacing.
3. The low-material-consumption reinforced concrete pipe pile according to claim 2, characterized in that, The outer concrete protective layer is made of C50-C60 high-strength concrete, and the inner concrete load-bearing layer is made of C30-C40 ordinary concrete.
4. The low-material-consumption reinforced concrete pipe pile according to claim 3, characterized in that, The anchor bars are distributed in a Y-shape, with their ends extending to the outer surface of the outer concrete protective layer to form anti-stripping protrusions.
5. The low-material-consumption reinforced concrete pipe pile according to claim 4, characterized in that, The composite reinforcement layer contains steel fiber reinforcement material with a length of 20-30 mm and an addition amount of 1.5-2.5% of the concrete volume.