A micro-ribbed steel pipe pile with a steel strip
Patent Information
- Application Number
- CN202522219075.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-21
- Publication Date
- 2026-09-22
- Estimated Expiration
- 2035-10-21
AI Technical Summary
微型桩加固滑坡灾害是近年来采用的一种新技术，在浅层滑坡加固理论、方法方面取得了较大的进展和成功应用，其具有对滑体扰动小、施工机具小、适用于狭窄的施工作业区且完全避免了过多的开挖对环境造成的破坏、桩位布置灵活、适宜性强，施工速度、工程造价低等特点，但微型桩虽然解决了普通抗滑桩面临的问题，但其受力性能难以满足下滑力较大边坡的抗滑需求
[0009]本实用新型的有益效果：本实用新型通过在带肋加强钢管桩上设置不锈钢美式金属膨胀钉，使套管外壁与桩周土体形成高强度摩擦结合，有效利用土体与结构的嵌固作用抵抗滑移，增强桩体稳定性。
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Figure CN224784846U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of geological disaster prevention and control technology, and relates to a miniature ribbed reinforced steel pipe pile with steel spikes. Background Technology
[0002] Currently, the development and application of retaining and anti-slide structures in landslide prevention and control are particularly rapid. Anti-slide piles and other anti-slide retaining structures, as "heavy weapons," have become the main prevention and control measures for landslide management. However, from a technical and economic perspective, they are not suitable for reinforcing all types of landslides. Micropile reinforcement of landslide disasters is a new technology adopted in recent years. It has made significant progress and successful applications in the theory and methods of shallow landslide reinforcement. It has the advantages of minimal disturbance to the landslide body, small construction equipment, suitability for narrow construction areas and complete avoidance of environmental damage caused by excessive excavation, flexible pile placement, strong adaptability, fast construction speed, and low project cost. However, although micropiles have solved the problems faced by ordinary anti-slide piles, their stress performance is difficult to meet the anti-slide requirements of slopes with large sliding forces. Utility Model Content
[0003] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is a miniature ribbed reinforced steel pipe pile with steel spikes, including a vertically arranged hollow steel pipe pile. Ribbed spiral plates extending along its height direction are fixed to the outer wall of the steel pipe pile. A boat-shaped positioning frame is also fixed to the outer wall of the steel pipe pile. The boat-shaped positioning frame is fixed between adjacent pitches of the ribbed spiral plates. A perforated tube is provided at one end of the steel pipe pile. Multiple rows of expansion nail units are provided on the outer wall of the steel pipe pile. Guide holes are opened on the pile wall of the steel pipe pile corresponding to each expansion nail unit. The expansion nail units are staggered axially and circumferentially from the boat-shaped positioning frame and the ribbed spiral plates. A special-shaped cross steel is inserted into the core of the hollow steel pipe pile along its vertical axis.
[0004] Furthermore, the expansion nail unit includes a fixing plate with a through hole in the center and an expansion nail. The fixing plate is fixed to the outer wall of the steel pipe pile, and its through hole is coaxially aligned with the guide hole opened on the pile wall of the steel pipe pile. The rod of the expansion nail can pass through the through hole and the guide hole.
[0005] Furthermore, the radial protrusion height of the ribbed spiral blades from the outer wall of the steel pipe pile is 10mm~15mm, and the axial spacing is 1.0m~3.0m.
[0006] Furthermore, the radial protrusion height of the ribbed spiral blades from the outer wall of the steel pipe pile is 10mm~15mm, and the axial spacing is 1.0m~3.0m.
[0007] Furthermore, the expansion nails are installed in the axial section from the top of the steel pipe pile to a distance of 1.0 to 1.5 m from the perforated pipe, and are arranged at axial intervals of 1.0 m within this area. At each axial arrangement position, the expansion nails are evenly arranged along the circumference of the steel pipe pile.
[0008] Furthermore, the irregular cross steel includes two reinforcing sections along its axial direction. The two reinforcing sections are respectively located within a range of 1 to 1.5 meters above and below the landslide slip surface. The cross-sectional configuration of the reinforcing sections is a double I-beam cross combination structure.
[0009] The beneficial effects of this utility model are as follows: By setting stainless steel American-style metal expansion nails on ribbed reinforced steel pipe piles, this utility model enables the outer wall of the casing to form a high-strength frictional bond with the soil around the pile, effectively utilizing the embedding effect of the soil and structure to resist slippage and enhance the stability of the pile.
[0010] This invention involves inserting a cross-shaped steel bar, matching the diameter of the pile borehole, into a ribbed steel pipe pile, thus forming an integral structure with the pile borehole. The cross-shaped steel bar acts as a reinforcing rib and internal support, significantly enhancing the pile's bending and torsional resistance without increasing the pipe wall thickness, particularly in its resistance to torsional deformation in the areas above and below the slip surface.
[0011] The steel pipe pile structure proposed in this utility model is easy to construct, has good mechanical properties, and can effectively improve the shear strength, anti-sliding and anti-deformation capacity of slope soil, and has good engineering applicability and anti-sliding effect. Attached Figure Description
[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0013] Figure 1 This is a schematic diagram of a miniature ribbed reinforced steel pipe pile structure with steel spikes;
[0014] Figure 2 This is a schematic diagram of the pile bottom structure of a miniature ribbed reinforced steel pipe pile with steel spikes;
[0015] Figure 3 This is a schematic diagram showing the distribution of I-beams on the sliding surface of a miniature ribbed reinforced steel pipe pile with steel spikes.
[0016] Figure 4 yes Figure 1 AA sectional view.
[0017] In the diagram, 1. Fixing plate, 2. Ribbed spiral plate, 3. Soil surrounding the pile, 4. Steel pipe pile, 5. Static pressure machine head, 6. Expansion nail, 7. Pile core, 8. Boat-shaped positioning frame, 9. Pile hole, 10. Perforated pipe, 11. Expansion nail unit, 12. Cement grout, 13. Irregularly shaped cross steel. Detailed Implementation
[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0019] like Figure 1 , Figure 2 , Figure 4 As shown, this utility model embodiment provides a miniature ribbed reinforced steel pipe pile with steel spikes, including a vertically arranged hollow steel pipe pile 4. Ribbed spiral blades 2 extending along its height direction are fixed to the outer wall of the steel pipe pile 4. A boat-shaped positioning frame 8 is also fixed to the outer wall of the steel pipe pile 4. The boat-shaped positioning frame 8 is fixed between adjacent pitches of the ribbed spiral blades 2. A perforated tube 10 is provided at one end of the steel pipe pile 4. The perforated tube 10 has a perforated hole specification of φ20@1000. Multiple rows of expansion nail units 11 are provided on the outer wall of the steel pipe pile 4. A guide hole is opened on the pile wall of the steel pipe pile 4 corresponding to each expansion nail unit 11. The expansion nail units 11 are staggered axially and circumferentially from the boat-shaped positioning frame 8 and the ribbed spiral blades 2. A special-shaped cross steel 13 is inserted into the pile core 7 of the steel pipe pile 4.
[0020] The expansion nail unit 11 includes a fixing plate 1 and an expansion nail 6 fixed to the outer wall of the steel pipe pile 4. The fixing plate 1 has a through hole in the center, and the projected area of the through hole is smaller than the nail head area of the expansion nail 6. On the wall surface of the steel pipe pile 4 corresponding to the through hole of the fixing plate 1, there is a guide hole for the expansion nail 6 to pass through. During construction, the expansion nail 6 is inserted into the through hole of the fixing plate 1 and the guide hole of the pile wall of the steel pipe pile 4. The expansion nail 6 is driven by the static pressure mechanical head 5 that impacts the top of the pile, so that the expansion nail 6 expands radially in the soil and locks in place, thereby achieving high-strength anchoring.
[0021] The radial protrusion height of the ribbed spiral blade 2 from the outer wall of the steel pipe pile 4 is 10mm~15mm, and the axial spacing is 1.0m~3.0m.
[0022] The expansion nail 6 is installed in the axial section from the top of the steel pipe pile 4 to a distance of 1.0 to 1.5m from the perforated pipe 10. The expansion nails 6 are arranged in this area at axial intervals of 1.0 meters. At each axial arrangement position, the expansion nails 6 are evenly arranged along the circumference of the steel pipe pile 4.
[0023] like Figure 3 and Figure 4 As shown, the irregular cross steel 13 includes two reinforcing sections along its axial direction. The two reinforcing sections are located within a range of 1 to 1.5 meters above and below the landslide slip surface, respectively. The cross-sectional configuration of the reinforcing sections is a double I-beam cross combination structure.
[0024] The principle of the ribbed spiral blade 2 in the miniature ribbed reinforced steel pipe pile with steel spikes proposed in this utility model is as follows: During the implantation of the steel pipe pile 4, the ribbed spiral blade 2 is screwed into the soil. Its continuous structure generates a huge contact area and friction with the soil. When the ribbed spiral blade 2 is screwed in, it will squeeze the soil along its path, making it more compact, thereby directly improving the strength of the soil around the pile and the side friction of the pile.
[0025] The principle of fixing plate 1 is to distribute the concentrated stress of the expansion nail to a larger area of the steel pipe pile wall, so as to prevent local crushing.
[0026] The principle of expansion nail 6 is that when the top of the steel pipe pile 4 is subjected to tension or compression, the expansion nail 6 will engage with the cement grout around the steel pipe pile 4 to prevent the steel pipe pile 4 from loosening and slipping. The expansion nail 6 is the key to achieving high pull-out resistance.
[0027] The principle of the perforated pipe 10 is as follows: After the steel pipe pile 4 is placed in place, cement grout is injected through the pile hole 9. The cement grout is squeezed into the hole of the perforated pipe 10 and forms a cement grout solidified body around the pile end of the steel pipe pile 4. By expanding the end bearing area, the end bearing capacity and pull-out resistance of the steel pipe pile 4 are improved.
[0028] The principle of the irregular cross steel 13 is that the irregular cross steel 13 can improve the bending stiffness of the entire steel pipe pile 4, so that the steel pipe pile 4 can better resist the shear force brought by soil slippage and prevent the pile body from breaking.
[0029] The principle of the boat-shaped positioning frame 8 is that the boat-shaped positioning frame 8 provides stable support between the pile body of the steel pipe pile 4 and the hole wall of the pile hole 9, ensuring that the pile body of the steel pipe pile 4 is located in the center of the hole of the pile hole 9, thereby ensuring that the thickness of the cement slurry protective layer around the pile is uniform, so that the pile body can be subjected to force evenly.
[0030] The method of using a miniature ribbed reinforced steel pipe pile with steel spikes proposed in this utility model is as follows:
[0031] S1: At the selected support location on the landslide body, a hydraulic crawler drilling rig is used to drill holes. The drilling process uses clear water and does not use mud slurry for wall protection. The diameter of the resulting pile holes 9 is φ200±10mm. The spacing between each pile hole 9 in the horizontal and vertical directions is 1.0+0.05m, and they are arranged in a quincunx pattern.
[0032] S2: The miniature ribbed reinforced steel pipe pile with steel spikes is inserted into the pile hole 9. The expansion nails 6 on the miniature ribbed reinforced steel pipe pile with steel spikes (diameter 146±5mm, wall thickness 10+5mm) are pressed into the soil around the pile 3 using the static pressure mechanical head 5. During the pressing process, the expansion nails 6 expand in the soil, thereby forming an anchoring force with the surrounding soil and providing adhesion for the pile.
[0033] S3: Insert irregularly shaped cross steel 13 into the core 7 of the steel pipe pile 4 to enhance the deformation resistance of the area.
[0034] S4: Inject cement grout 12 into pile hole 9 with a water-cement ratio of 0.45:1 and a grouting pressure of 0.5-3.0MPa. If no grout is absorbed or the grout absorption rate is <0.4L / min, continue for 30 minutes to end the grouting process.
[0035] Through the above steps, a miniature ribbed reinforced steel pipe pile with steel spikes is finally formed in the landslide body.
[0036] The various embodiments in this specification are described in a related manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.
[0037] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model are included within the scope of protection of this utility model.
Claims
1. A miniature ribbed reinforced steel pipe pile with steel spikes, characterized in that, The structure includes a vertically arranged hollow steel pipe pile (4), on which a ribbed spiral plate (2) extending along its height direction is fixedly connected to the outer wall of the steel pipe pile (4), and a boat-shaped positioning frame (8) is also fixedly connected to the outer wall of the steel pipe pile (4). The boat-shaped positioning frame (8) is fixed between adjacent pitches of the ribbed spiral plate (2). One end of the steel pipe pile (4) is provided with a flower tube (10). Multiple rows of expansion nail units (11) are provided on the outer wall of the steel pipe pile (4). Guide holes are opened on the pile wall of the steel pipe pile (4) corresponding to each expansion nail unit (11). The expansion nail unit (11) is staggered from the boat-shaped positioning frame (8) and the ribbed spiral plate (2) in both the axial and circumferential directions. A special-shaped cross steel (13) is inserted into the pile core (7) of the hollow steel pipe pile (4) along its vertical axis.
2. The miniature ribbed reinforced steel pipe pile with steel spikes according to claim 1, characterized in that, The expansion nail unit (11) includes a fixing plate (1) with a through hole in the center and an expansion nail (6). The fixing plate (1) is fixed to the outer wall of the steel pipe pile (4), and its through hole is coaxially aligned with the guide hole opened on the pile wall of the steel pipe pile (4). The rod of the expansion nail (6) can pass through the through hole and the guide hole.
3. A miniature ribbed reinforced steel pipe pile with steel spikes according to claim 1, characterized in that, The ribbed spiral blade (2) protrudes radially from the outer wall of the steel pipe pile (4) by a height of 10mm~15mm, and the axial spacing is 1.0m~3.0m.
4. A miniature ribbed reinforced steel pipe pile with steel spikes according to claim 2, characterized in that, The expansion nails (6) are arranged in the axial section from the top of the steel pipe pile (4) to a distance of 1.0 to 1.5 m from the flower pipe (10), and are arranged in this area at axial intervals of 1.0 m. At each axial arrangement position, the expansion nails (6) are evenly arranged along the circumference of the steel pipe pile (4).
5. A miniature ribbed reinforced steel pipe pile with steel spikes according to claim 1, characterized in that, The irregular cross steel (13) includes two reinforcing sections along its axial direction. The two reinforcing sections are located within a range of 1 to 1.5 meters above and below the landslide slip surface, respectively. The cross-sectional configuration of the reinforcing sections is a double I-beam cross combination structure.