Threaded piles suitable for both soft and hard foundations
By setting helical blades and gradually increasing the helical blade structure on the threaded piles, the problem of insufficient compressive bearing capacity and anti-tipping capacity of the threaded piles on soft and hard foundations is solved, and better stability and adaptability are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WEIHAI LIDAER MACHINERY
- Filing Date
- 2025-08-14
- Publication Date
- 2026-07-03
AI Technical Summary
Existing threaded piles are insufficient in compressive bearing capacity and anti-overturning capacity on complex mixed soft and hard foundations, resulting in vertical settlement and radial displacement, which affects bearing and positioning functions.
Helical blades and multiple progressively increasing helical blade structures are installed on the columnar body of the threaded pile. The diameter of the helical blade structures gradually increases, forming an anchoring system with multiple depths and multiple sizes, increasing lateral support and vertical bearing capacity, and providing stability in combination with the bearing plate.
It improves the compressive bearing capacity and anti-tipping capacity of threaded piles on soft and hard foundations, ensures stable positioning, and adapts to the needs of different foundation conditions.
Smart Images
Figure CN224451604U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of ground pile technology, and in particular to a threaded ground pile that can be used for both soft and hard foundations. Background Technology
[0002] With continuous improvements in threaded pile foundations, their application scope has expanded from small-scale ground construction fields such as streetlights and billboard supports to large-scale ground construction fields such as greenhouse supports and photovoltaic supports. As the application scope expands, the foundation properties of the installation area also increase, no longer limited to traditional hard foundations, but also including soft foundations and foundations with complex mixtures of soft and hard materials.
[0003] Existing threaded piles generally employ a method of welding continuous helical blades to the outside of a steel pipe, such as the structure disclosed in patent CN217896476U. This structure has good vertical penetration force. However, when this type of pile is applied to soft foundations or complex mixed foundations of hard and soft materials, its compressive bearing capacity and anti-overturning capacity are insufficient. As a foundation, the pile is prone to vertical settlement and radial displacement, which affects the bearing and positioning functions of the threaded pile. Utility Model Content
[0004] To address the shortcomings of the existing technology, this utility model provides a threaded pile suitable for both soft and hard foundations, which improves its compressive bearing capacity and anti-tipping capacity while ensuring its vertical penetration force.
[0005] The technical solution of this utility model is as follows: a threaded pile suitable for both soft and hard foundations, comprising a columnar body, a connecting seat fixed at one end of the columnar body as a bearing foundation, and a conical structure at the other end of the columnar body. A helical blade is fixed to the outer side of the conical structure. At least two spiral blade structures are fixed on the columnar body between the helical blade and the connecting seat. The diameter of each spiral blade structure is larger than the diameter of the helical blade, and the diameter of each spiral blade structure increases progressively in the direction away from the helical blade. The helical blade ensures the original penetration force of the helical pile. The progressively increasing spiral blade structures above the helical blade provide progressively increasing lateral support and vertical bearing capacity to the columnar body drilling into the soil, thereby improving the vertical compressive bearing capacity and radial anti-overturning capacity of the helical pile.
[0006] The spiral blade has at least 20 spiral turns, with the tip of the conical structure as the base point, and the upper end of the spiral blade extends to a position of more than 50% of the length of the columnar body.
[0007] The spiral structure has at least one spiral turn, and the spiral direction of the spiral structure is the same as that of the spiral blade.
[0008] The pitch of the spiral structure is greater than the pitch of the spiral blade.
[0009] The number of the spiral blade structures is two, namely a first spiral blade structure and a second spiral blade structure. The first spiral blade structure is located at the lower middle position of the columnar body between the spiral blade and the connecting seat, and the second spiral blade structure is located at the upper middle position of the columnar body between the spiral blade and the connecting seat.
[0010] The diameter of the spiral blade is greater than the diameter of the columnar body but not more than 1.5 times the diameter of the columnar body; the diameter of the first spiral blade structure is greater than 1.5 times the diameter of the columnar body but not more than 2.5 times the diameter of the columnar body; and the diameter of the second spiral blade structure is greater than 2.5 times the diameter of the columnar body but not more than 3.5 times the diameter of the columnar body.
[0011] A pressure plate is fixed on the columnar body between the connecting seat and the adjacent swivel structure, and the size of the pressure plate is not less than the maximum size of the swivel structure.
[0012] The connector has multiple arc-shaped connecting holes arranged radially from its center, and each arc-shaped connecting hole is concentric with the center of the columnar body.
[0013] The tip of the conical structure is fixed with a multi-faceted drill bit.
[0014] In summary, the present invention has the following main advantages:
[0015] This invention features a helical blade at the lower end of a columnar body and multiple helical blade structures whose dimensions increase progressively in the direction away from the helical blade. By applying a rotational force to the columnar body on the connecting seat, the rotating blades drive the columnar body to generate the same vertical penetration force as the original helical pile. As the columnar body penetrates into the soil, the helical blade structures, which are larger than the helical blades, provide lateral support and vertical bearing capacity. Furthermore, as the size of each helical blade structure increases progressively, the lateral support and vertical bearing capacity provided at the corresponding columnar body position also increase progressively. That is, the closer to the ground, the greater its bearing capacity and support. This can be combined and supplemented with the soil forces experienced by the columnar body at different depths inserted into the foundation, allowing it to better exert the effect of progressively offsetting the forces from the external environment. Thus, it takes into account both the penetration force required for hard foundations and the compressive bearing capacity and anti-tipping capacity required for soft foundations. Attached Figure Description
[0016] Figure 1 This is the front view of this utility model;
[0017] Figure 2 This is a schematic diagram of the structure of this utility model;
[0018] Figure 3 This is a structural schematic diagram of the present invention from another angle;
[0019] Figure 4 This is a bottom view of the present invention;
[0020] Figure 5 This is a top view of the present invention.
[0021] Reference numerals: 1. Columnar body; 101. Conical structure; 2. Multi-faceted drill head; 3. Connecting seat; 301. Arc-shaped connecting hole; 302. Reinforcing rib group; 4. Helical blade; 5. First helical blade structure; 6. Second helical blade structure; 7. Pressure plate. Detailed Implementation
[0022] The technical solutions of the present utility model will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0023] In the following description, 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 indicated technical features. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0024] Furthermore, in this utility model, directional terms such as "upper," "lower," "left," and "right" may be defined relative to the orientation of the components shown in the accompanying drawings. It should be understood that these directional terms can be relative concepts, used for relative description and clarification, and can change accordingly based on the orientation of the components in the accompanying drawings.
[0025] like Figures 1-3 As shown, this utility model provides a threaded pile suitable for both soft and hard foundations, including a columnar body 1. One end of the columnar body 1 is fixed with a connecting seat 3 serving as a bearing foundation, and the other end of the columnar body 1 has a conical structure 101. A helical blade 4 is fixed to the outer side of the conical structure 101. The conical structure 101 serves as the initial section for the helical pile to penetrate the soil layer, reducing the soil's resistance force and allowing it to smoothly cut into the soil layer, thus facilitating a stable connection between the columnar body and the soil layer. The addition of the helical blade 4 on the outer side utilizes rotational force to give the columnar body 1 the same vertical penetration force as existing threaded piles, thereby more smoothly penetrating the soil layer. Further preferably, to improve the soil-breaking effect of the conical structure 101, such as... Figure 4 As shown, the tip of the conical structure 101 is fixed with a multi-faceted drill head 2, preferably a cross-shaped drill head 2.
[0026] Specifically, in this solution, the connecting seat 3 is a mounting flange, which is welded and fixed to the upper end of the columnar body 1, such as... Figure 5 As shown, the mounting flange has multiple connection holes, each of which is a radially arranged arc-shaped connection hole 301 along the center of the mounting flange. Each arc-shaped connection hole 301 is concentric with the center of the columnar body 1. It is used to connect with the flange at the output end of the drilling rig or to the mounting body such as street light, billboard bracket, photovoltaic bracket, and greenhouse bracket. The arc-shaped connection holes 301 facilitate the angle adjustment of the upper bracket. To ensure the installation strength of the mounting flange, a reinforcing rib group 302 is fixed between the mounting flange and the columnar body 1.
[0027] At least two spiral blade structures are fixed on the columnar body 1 between the helical blade 4 and the connecting seat 3. The diameter of each spiral blade structure is larger than the diameter of the helical blade 4, and the diameter of each spiral blade structure increases sequentially in the direction away from the helical blade 4. In this scheme, there are two spiral blade structures, namely a first spiral blade structure 5 and a second spiral blade structure 6. The first spiral blade structure 5 is located at a lower position in the middle of the columnar body 1 between the helical blade 4 and the connecting seat 3, and the second spiral blade structure 6 is located at a higher position in the middle of the columnar body 1 between the helical blade 4 and the connecting seat 3. That is, the diameter of the first spiral blade structure 5 is larger than the diameter of the helical blade 4, and the diameter of the second spiral blade structure 6 is larger than the diameter of the first spiral blade structure 5. The leaf structure is set as an independent anchor point on the outside of the columnar body 1. The size increases progressively, forming a multi-depth and multi-size anchoring system, which increases the overall anti-tipping capacity of the threaded pile. It forms a bearing plate in the vertical direction. The load is distributed at different depths by the different sizes of the spiral leaf structure, so that the stress distribution transmitted to the soil layer is more reasonable and uniform. It helps to offset the effect of the external environmental forces, so that the threaded pile has better compressive bearing capacity. In addition, during the process of the spiral pile being screwed into the soil layer, the small diameter spiral blade 4 leads the way, and the first spiral blade structure 5 and the second spiral blade structure 6 enter layer by layer. Compared with the use of large-sized spiral blades to cut directly, it causes less soil disturbance, that is, the combination effect between the soil layer and the spiral pile is better.
[0028] More preferably, the spiral blade 4 has at least 20 spiral turns, the spiral blade structure has at least 1 spiral turn, and the spiral direction of the spiral blade structure is the same as that of the spiral blade 4. Taking the tip of the conical structure 101 as the base point, the upper end of the spiral blade 4 extends to a position at more than 50% of the total length of the cylindrical body 1. Preferably, the spiral blade 4 occupies no more than 60% of the length of the cylindrical body 1. The first spiral blade structure 5 is located in the range of 60-65% of the total length of the cylindrical body, and the second spiral blade structure 6 is located in the range of 80-90% of the total length of the cylindrical body. That is, taking the length of the cylindrical body 1 as an example of 2.0m, the position of the end of the spiral blade 4 is in the range of 1m-1.2m from the tip of the conical structure 101, while the first spiral blade structure 5 is in the range of 1.2m-1.3m from the tip of the conical structure 101, and the second spiral blade structure 6 is in the range of 1.6m-1.8m from the tip of the conical structure 101.
[0029] Further preferred, such as Figure 1 As shown, the diameter D2 of the helical blade 4 is greater than the diameter D1 of the cylindrical body 1 but does not exceed 1.5 times the diameter D1, preferably 1.2-1.4 times; the diameter D3 of the first helical blade structure 5 is greater than 1.5 times the diameter D1 of the cylindrical body 1 but does not exceed 2.5 times the diameter D1, preferably 1.8-2.2 times; the diameter D4 of the second helical blade structure 6 is greater than 2.5 times the diameter D1 of the cylindrical body 1 but does not exceed 3.5 times the diameter D1, preferably 2.8-3.2 times. In this embodiment, the diameter D1 of the cylindrical body 1 is 60 mm, the diameter D2 of the helical blade 4 is 72-84 mm, the diameter D3 of the first helical blade structure 5 is 108-132 mm, and the diameter D4 of the second helical blade structure 6 is 168-192 mm.
[0030] The pitch of the spiral blade structure is greater than the pitch of the spiral blade 4. Preferably, the pitch of the spiral blade structure is 2-3 times the pitch of the spiral blade 4. The larger pitch of the spiral blade structure increases the amount of soil within the spiral blade structure, thereby improving its lateral anchoring effect and strengthening its anti-tipping ability. More preferably, the pitch of the spiral blade structure is 2.5 times the pitch of the spiral blade 4. Specifically, in this embodiment, the pitch of the spiral blade 4 is 30-40 mm, and the pitch of the first spiral blade structure 5 and the second spiral blade structure 6 is 75-100 mm.
[0031] To further improve the vertical bearing capacity of the threaded pile, a pressure plate 7 is fixed on the columnar body 1 between the connecting seat 3 and the adjacent spiral structure. The size of the pressure plate 7 is not less than the maximum size of the spiral structure, that is, the size of the pressure plate 7 is not less than the size of the second spiral structure 6. In this embodiment, the pressure plate 7 is a disc structure with the same diameter D4 as the second spiral structure 6. When the spiral pile is screwed into the soil, the pressure plate 7 is in contact with the ground, thereby forming the first pressure-bearing part of the threaded pile to prevent the threaded pile from sinking.
[0032] When implementing the above technical solution, a galvanized steel pipe with a length of 2m and a diameter of 60mm is used as the cylindrical body. Its front end is processed into a closed conical structure 101, and a cross ridge is welded and fixed to the front end of the conical structure 101 to form a multi-faceted drill bit. The spiral blade 4 has a pitch of 30mm, a diameter of 75mm, and 35 turns, and is fixed to the front end of the galvanized steel pipe. The section connecting the spiral blade 4 to the conical structure 101 is gradually tapered. The first spiral blade structure 5 has a pitch of 75mm, a diameter of 110mm, and 1 turn, and is fixed at a position 1.2m away from the tip. The second spiral blade structure 6... The screw has a pitch of 75mm, a diameter of 170mm, and is fixed at a position 1.6m away from the tip, forming a spiral blade structure with two progressive sizes. The bearing plate 7 is a disc with a diameter of 170mm fixed at a distance of 10cm below the connecting seat 3. The multi-faceted drill bit breaks through the soil and spirals into the soil layer through the spiral blade 4. The bearing plate 7 is in contact with the ground. The first spiral blade structure 5 and the second spiral blade structure 6 form an anchoring system with multiple depths and multiple sizes, so that the threaded ground pile can take into account the penetration force required for hard foundations and the compressive bearing capacity and anti-tipping capacity required for soft foundations.
[0033] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A threaded pile suitable for both soft and hard foundations, comprising a columnar body, one end of which is fixed with a connecting seat serving as a bearing foundation, and the other end of which has a conical structure, with helical blades fixed to the outer side of the conical structure, characterized in that... At least two spiral blade structures are fixed on the columnar body between the spiral blade and the connecting seat. The diameter of each spiral blade structure is larger than the diameter of the spiral blade, and the diameter of each spiral blade structure increases sequentially in the direction away from the spiral blade.
2. The soft and hard ground compatible threaded ground pile according to claim 1, wherein, The spiral blade has at least 20 spiral turns, with the tip of the conical structure as the base point, and the upper end of the spiral blade extends to a position of more than 50% of the length of the columnar body.
3. The soft and hard ground compatible threaded ground pile according to claim 1 or 2, wherein, The spiral structure has at least one spiral turn, and the spiral direction of the spiral structure is the same as that of the spiral blade.
4. The threaded pile for both soft and hard foundations according to claim 1, characterized in that, The pitch of the spiral structure is greater than the pitch of the spiral blade.
5. The soft and hard ground compatible threaded ground pile according to claim 1, wherein, The number of the spiral blade structures is two, namely a first spiral blade structure and a second spiral blade structure. The first spiral blade structure is located at the lower middle position of the columnar body between the spiral blade and the connecting seat, and the second spiral blade structure is located at the upper middle position of the columnar body between the spiral blade and the connecting seat.
6. The soft and hard ground compatible threaded ground pile according to claim 5, wherein, The diameter of the spiral blade is greater than the diameter of the columnar body but not more than 1.5 times the diameter of the columnar body; the diameter of the first spiral blade structure is greater than 1.5 times the diameter of the columnar body but not more than 2.5 times the diameter of the columnar body; and the diameter of the second spiral blade structure is greater than 2.5 times the diameter of the columnar body but not more than 3.5 times the diameter of the columnar body.
7. The threaded pile for both soft and hard foundations according to claim 1, characterized in that, A pressure plate is fixed on the columnar body between the connecting seat and the adjacent swivel structure, and the size of the pressure plate is not less than the maximum size of the swivel structure.
8. The soft and hard ground dual-purpose threaded pile according to claim 1 or 2 or 4 or 5 or 6 or 7, wherein, The connector has multiple arc-shaped connecting holes arranged radially from its center, and each arc-shaped connecting hole is concentric with the center of the columnar body.
9. The soft and hard ground dual-purpose threaded pile according to claim 1 or 2 or 4 or 5 or 6 or 7, wherein, The tip of the conical structure is fixed with a multi-faceted drill bit.