A pipe pile tip structure
By designing a ring-shaped stepped interlocking pile tip and a spiked pile tip in the precast pipe pile tip structure, the problem of pile tilting or breakage under complex geological conditions was solved, achieving efficient penetration and low-cost construction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGZHOU N0 3 MUNICIPAL ENG GRP CO LTD
- Filing Date
- 2025-05-16
- Publication Date
- 2026-06-09
AI Technical Summary
Existing precast pipe pile tip structures are complex, have insufficient interlocking performance, and poor penetration under complex geological conditions, leading to problems such as pile tilting or pile breakage.
Design a pipe pile tip structure, including a circular base plate and multiple annular pile tips. There is a height difference between the annular pile tips, forming a stepped interlocking structure. The penetrating effect of the pile tip spikes is used to enhance the penetration, and the interlocking force on the inclined rock strata is improved through the multi-level interlocking structure.
It improves the construction efficiency of pipe piles under complex geological conditions, reduces resistance and manufacturing costs, avoids pile tilting or breakage, and optimizes the pile tip structure.
Smart Images
Figure CN224338227U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of precast pipe pile construction technology, and more specifically, to a pipe pile tip structure used in the construction of precast pipe piles under complex geological conditions. Background Technology
[0002] In existing technologies, the driving of precast pipe piles into complex geological conditions mainly relies on pre-drilling methods and the use of large pile hammers with heavy but light driving after adding shims to the pile head. However, pre-drilling is expensive, and the heavy but light driving method with large pile hammers is prone to damage to the pile head. When driving precast pipe piles into sloping rock, the poor rock grip of the pile tip makes it easy for the pile to tilt or even break during the driving process.
[0003] A technology closely related to this invention comes from utility model patent CN217758752U, which discloses a square sawtooth inner cross pile tip for prestressed concrete pipe piles. By vertically welding a sawtooth outer plate forming a closed rectangle and an inner cross plate within the sawtooth outer plate to the upper surface of a circular base plate, it achieves rapid interlocking with rock strata under karst topographic conditions, thereby improving the pile formation rate of prestressed concrete pipe piles. However, the technical solution of the above patent has the following drawbacks:
[0004] First, the structure is relatively complex, consisting of multiple steel plates welded together, and the processing of a single pile tip takes a long time.
[0005] Second, when the rock slope is large, the interlocking performance of the pile tip structure still cannot meet the requirements, and it is easy to slip, causing the pile body to tilt and break. The pipe pile cannot meet the bearing capacity, thus forming a waste pile.
[0006] Third, the pile tip structure has poor penetration performance into the rock strata. Summary of the Invention
[0007] This utility model provides a pipe pile tip structure to solve the technical problems of existing pipe pile tip structures being complex, having insufficient interlocking performance when facing complex rock strata, and having poor penetration into rock strata.
[0008] This utility model provides a pipe pile tip structure, including a circular base plate. The bottom of the circular base plate is provided with a pile tip spike. One end of the pile tip spike is connected to the circular base plate and located on the central axis of the circular base plate. Multiple annular pile tips are provided along the radial direction of the circular base plate. The multiple annular pile tips extend from the bottom of the circular base plate away from the circular base plate. There is a height difference between the multiple annular pile tips in the axial direction of the circular base plate. When facing inclined rock strata, the multiple annular pile tips make sequential contact with the inclined rock strata through the stepped height difference to form a multi-level interlocking structure.
[0009] Furthermore, the plurality of annular pile tips include at least a first annular pile tip and a second annular pile tip arranged radially outward along the circular base plate, wherein the first annular pile tip and the second annular pile tip have different heights to form a stepped structure.
[0010] Furthermore, the height of the pile tip spike is greater than the height of the first annular pile tip and the second annular pile tip, so that during construction, the pile tip spike preferentially contacts the inclined rock strata.
[0011] Furthermore, the pile tip spike has a cross-shaped structure, which extends outward from the bottom surface of the circular base plate. In the radial direction of the circular base plate, the cross-shaped structure connects the pile tip spike to the first annular pile tip. The cone head of the cross-shaped structure serves as the head of the pile tip spike and preferentially contacts the inclined rock strata.
[0012] Furthermore, the ends of the first annular pile tip and the second annular pile tip are both provided with serrations along their respective circumferential directions.
[0013] Furthermore, the saw teeth are in the shape of isosceles triangles, and the wedge angle of the saw teeth is 50 to 90 degrees.
[0014] Furthermore, the height of the first annular pile tip is greater than the height of the second annular pile tip.
[0015] Furthermore, the height of the first annular pile tip is less than the height of the second annular pile tip.
[0016] Furthermore, multiple reinforcing plates are provided between the first annular pile tip and the second annular pile tip.
[0017] Furthermore, the height difference between the first annular pile tip and the second annular pile tip is 50mm to 100mm.
[0018] The beneficial effects of this utility model are:
[0019] This utility model discloses a pipe pile tip structure. By setting a pile tip spike on the central axis of a circular base plate, the piercing effect of the pile tip spike enhances the penetration of rock strata and improves construction efficiency. By setting multiple annular pile tips of different heights on the circular base plate, the height difference between the multiple annular pile tips in the axial direction of the circular base plate allows the multiple annular pile tips to make sequential contact with the inclined rock strata through a stepped height difference. When facing inclined rock strata with a large slope, it can form a multi-level interlocking structure, avoiding the pipe pile tip structure from tilting or breaking due to insufficient interlocking force, thus preventing the pipe pile from becoming a waste pile. By using ring-shaped pipe material for processing, the number of parts is reduced, the welding length is shortened, the pipe pile tip structure is optimized, the manufacturing cost is reduced, and the manufacturing efficiency is improved.
[0020] Other features and advantages of the present invention will become clear from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. Attached Figure Description
[0021] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present invention and, together with their description, serve to explain the principles of the present invention.
[0022] Figure 1 This is a front view of the pipe pile tip structure according to an embodiment of the present utility model;
[0023] Figure 2 This is a perspective view of the pipe pile tip structure according to an embodiment of the present utility model;
[0024] Figure 3 This is a schematic diagram of the pipe pile tip structure encountering rock strata according to an embodiment of this utility model;
[0025] Figure 4 This is a schematic diagram of the pipe pile tip structure encountering rock strata in another embodiment of this utility model.
[0026] Figure label:
[0027] 1. Circular base plate; 2. Pile tip spike; 3. Ring pile tip; 4. Inclined rock strata; 5. Ribbed plate;
[0028] First annular pile tip 31; second annular pile tip 32; serrations 33. Detailed Implementation
[0029] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values of the components and steps set forth in these embodiments do not limit the scope of the present invention.
[0030] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.
[0031] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.
[0032] In all the examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.
[0033] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.
[0034] In the specification and claims of this utility model, the terms "first" and "second" may explicitly or implicitly include one or more of those features. In the description of this utility model, unless otherwise stated, "multiple" means two or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.
[0035] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and other terms indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model.
[0036] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0037] The pile tip structure according to an embodiment of the present invention will be described in detail below with reference to the accompanying drawings.
[0038] According to an embodiment of the present invention, a pile tip structure includes a circular base plate 1, a pile tip spike 2 at the bottom of the circular base plate 1, one end of the pile tip spike 2 being connected to the circular base plate 1 and located on the central axis of the circular base plate 1; a plurality of annular pile tips 3 are provided along the radial direction of the circular base plate 1, the plurality of annular pile tips 3 extending from the bottom of the circular base plate 1 away from the circular base plate 1, and there is a height difference between the plurality of annular pile tips 3 in the axial direction of the circular base plate 1. When facing an inclined geological rock layer 4, the plurality of annular pile tips 3 make sequential contact with the inclined rock layer 4 through the stepped height difference to form a multi-level interlocking structure.
[0039] In other words, according to an embodiment of the present invention, a pipe pile tip structure, such as Figure 1 As shown, the structure includes a circular base plate 1, preferably made of steel plate, with a preferred thickness of 20 mm and a diameter of 480 mm to 500 mm. The circular base plate 1 primarily serves to connect the pipe pile tip structure to the prestressed pipe pile, preferably through welding. Specifically, the top of the circular base plate 1 is welded to the prestressed pipe pile, and the bottom is provided with a pile tip spike 2, which is welded to the circular base plate 1. The pile tip spike 2 is located on the central axis of the circular base plate 1 and extends away from the circular base plate 1. When the pipe pile tip structure is in operation, the pile tip spike 2 is used to pierce the rock strata, ensuring that the pipe pile tip structure can easily cut through the soil, reducing resistance and alleviating the pressure at the pile end.
[0040] Multiple annular pile tips 3 are provided radially along the circular base plate 1. The multiple annular pile tips 3 extend from the bottom of the circular base plate 1 away from the circular base plate 1. There is a height difference between the multiple annular pile tips 3 in the axial direction of the circular base plate 1, so that when encountering inclined rock strata 4 with a large slope, the annular pile tips 3 of different heights can contact the inclined rock strata 4 with different slope surfaces to form a multi-level interlocking structure.
[0041] This utility model discloses a pipe pile tip structure. By setting a pile tip spike 2 on the central axis of a circular base plate 1, the spike 2 can pierce the rock layer, enhance the penetration of the inclined rock layer 4, and ensure that the pipe pile tip structure can easily cut through the soil, reduce resistance, reduce pile end pressure, and improve construction efficiency. By setting multiple annular pile tips 3 of different heights on the circular base plate 1, the height difference between the multiple annular pile tips 3 in the axial direction of the circular base plate 1 allows the multiple annular pile tips 3 to make sequential contact with the inclined rock layer 4 through the stepped height difference. When facing an inclined rock layer 4 with a large slope, a multi-level interlocking structure can be formed, avoiding the pipe pile tip structure from tilting or breaking due to insufficient interlocking force, thus preventing the pipe pile from becoming a waste pile.
[0042] According to one embodiment of the present invention, such as Figure 1 As shown, the plurality of annular pile tips 3 include at least a first annular pile tip 31 and a second annular pile tip 32 arranged radially outward along the circular base plate 1. The first annular pile tip 31 and the second annular pile tip 32 have different heights to form a stepped structure.
[0043] In other words, there should be at least two ring-shaped pile tips 3, and possibly more, depending on the actual conditions of the inclined rock strata 4 with different slopes. Figure 1For example, the plurality of annular pile tips 3 include at least a first annular pile tip 31 and a second annular pile tip 32 arranged radially outward along the circular base plate 1. Both the first annular pile tip 31 and the second annular pile tip 32 are made of 20mm steel pipe or steel plate. The diameter of the first annular pile tip 31 is preferably 240mm, and the diameter of the second annular pile tip 32 is preferably 480mm. Furthermore, the ends of the first annular pile tip 31 and the second annular pile tip 32 are provided with serrations 33 along their respective circumferences. The tips of the serrations 33 are close to the soil-facing surface. The serrations 33 are evenly distributed around the circumference and are isosceles triangles with a wedge angle of 50 to 90 degrees, preferably 60 degrees. The first annular pile tip 31 and the second annular pile tip 32 have different heights to form a stepped structure, that is, the first annular pile tip 31 and the second annular pile tip 32 are arranged at different heights to ensure that the pile tip structure has a better interlocking effect with the inclined rock layer 4 when encountering a steep slope. The serrations 33 can increase the force exerted by the annular pointed pile 3 on the inclined rock layer 4, and prevent the annular pile tip 3 from spinning and slipping during operation.
[0044] According to one embodiment of the present invention, such as Figure 1 As shown, the height of the pile tip spike 2 is greater than the height of the first annular pile tip 31 and the second annular pile tip 32. During construction, the pile tip spike 2 preferentially contacts the geological rock stratum 4. The fact that the pile tip spike 2 contacts the rock stratum first ensures that the pile tip structure can more easily cut through the soil, reduce the resistance of the rock stratum to the sinking of the pipe pile, and alleviate the pressure on the pile end.
[0045] According to one embodiment of the present invention, such as Figure 2 As shown, the pile tip spike 2 has a cross-shaped structure. The cross-shaped structure extends outward from the bottom surface of the circular base plate 1. In the radial direction of the circular base plate 1, the cross-shaped structure connects the pile tip spike 2 with the first annular pile tip 31. The cone head of the cross-shaped structure serves as the head of the pile tip spike 2 and preferentially contacts the geological rock layer 4.
[0046] In other words, the pile tip spike 2 is made of 20mm steel plate and is cross-shaped. It is located in the inner ring of the first annular pile tip 31. The cross structure connects the main body of the pile tip spike 2 with the first annular pile tip 31, which can increase the overall structural strength of the pile tip spike 2. When the pile tip spike 2 pierces the rock layer, it is not easy to break, thus preventing the pile from becoming a waste.
[0047] Because of the height difference between the multiple annular pile tips 3, when facing inclined rock strata 4, the pile tip structure can form a stepped structure through the different heights of the multiple annular pile tips 3, thereby increasing the interlocking performance with the rock strata. Examples of different rock strata structures are given below.
[0048] In one embodiment of this utility model, the height of the first annular pile tip 31 is greater than the height of the second annular pile tip 32. For example... Figure 3 As shown, when the inclined rock stratum 4 has a concave structure, during the sinking construction of the pipe pile tip structure, the contact surface between the inclined rock stratum 4 and the pipe pile tip structure tends to slope from the center of the circular base plate 1 outwards. Therefore, the height of the first annular pile tip 31 is set to be greater than the height of the second annular pile tip 32. When the pile tip spike 2 pierces the rock stratum and sinks downwards, the height difference between the first annular pile tip 31 (located in the inner circle) and the second annular pile tip 32 (located in the outer circle) coincides with the direction of the contact surface, so that the first annular pile tip 31 and the second annular pile tip 32 can contact the inclined rock stratum 4 almost simultaneously (or sequentially, but with a very short time interval). This avoids the situation where one annular pile tip 3 contacts the inclined rock stratum 4 and sinks while the other annular pile tip 3 is unable to contact the inclined rock stratum 4 for a long time, resulting in only a single layer of contact between the entire pipe pile tip structure and the inclined rock stratum 4, with insufficient interlocking force. If the slope is large, the pipe pile tip structure is very easy to tilt or even break. In other words, when facing the inclined rock stratum 4 with a concave structure, the height of the first annular pile tip 31 is set to be greater than the height of the second annular pile tip 32, so that the contact between the first annular pile tip 31 and the second annular pile tip 32 and the inclined rock stratum 4 forms a sequential interlocking structure. Through multi-level interlocking contact, the interlocking force on the rock stratum is increased, and the tilting or even breakage of the pipe pile tip structure is avoided.
[0049] In another embodiment of this utility model, the height of the first annular pile tip 31 is less than the height of the second annular pile tip 32. For example... Figure 4 As shown, when the inclined rock stratum 4 has a convex structure, during the sinking construction of the pipe pile tip structure, the contact surface between the inclined rock stratum 4 and the pipe pile tip structure tends to slope downwards from the center of the circular base plate 1 outwards. Therefore, the height of the first annular pile tip 31 is set to be less than the height of the second annular pile tip 32. When the pile tip spike 2 pierces the rock stratum and sinks downwards, the height difference between the first annular pile tip 31 (located in the inner circle) and the second annular pile tip 32 (located in the outer circle) coincides with the direction of the contact surface, so that the first annular pile tip 31 and the second annular pile tip 32 can contact the inclined rock stratum 4 almost simultaneously (or sequentially, but with a very short time interval). This avoids the situation where one annular pile tip 3 contacts the inclined rock stratum 4 and sinks, while the other annular pile tip 3 is unable to contact the inclined rock stratum 4 for a long time, resulting in only a single layer of contact between the entire pipe pile tip structure and the inclined rock stratum 4, with insufficient interlocking force. If the slope is large, the pipe pile tip structure is very easy to tilt or even break. In other words, when facing the inclined rock stratum 4 with a convex structure, the height of the first annular pile tip 31 is set to be less than the height of the second annular pile tip 32, so that the contact between the first annular pile tip 31 and the second annular pile tip 32 and the inclined rock stratum 4 forms a sequential interlocking structure. Through multi-level interlocking contact, the interlocking force on the rock stratum is increased, and the tilting or even breakage of the pipe pile tip structure is avoided.
[0050] The height difference between the multiple annular pile tips 3 is 50mm to 100mm, preferably 60mm. That is to say, as Figure 3 As shown, when the inclined rock stratum 4 has a concave structure, the height of the first annular pile tip 31 is greater than the height of the second annular pile tip 32, and the height difference is preferably 60mm; Figure 4 As shown, when the inclined rock stratum 4 has a convex structure, the height of the first annular pile tip 31 is less than the height of the second annular pile tip 32, and the height difference is preferably 60mm. Multiple annular pile tips 3 are arranged with a height difference so that when encountering rock strata with a large slope, the pile tip structure has a better interlocking effect with the rock strata.
[0051] According to one embodiment of the present invention, such as Figure 2 As shown, multiple reinforcing plates 5 are provided between the first annular pile tip 31 and the second annular pile tip 32. The reinforcing plates 5 can connect and reinforce two adjacent annular pile tips 3, preferably by welding, to ensure that the annular pile tips 3 will not deform due to excessive external force.
[0052] The beneficial effects of this utility model are:
[0053] 1. By setting the pile tip spike 2 on the central axis of the circular base plate 1, the piercing action of the pile tip spike 2 is used to pierce the rock layer, enhance the penetration of the inclined rock layer 4, ensure that the pile tip structure can easily cut the soil, reduce resistance, reduce pile end pressure, and effectively improve the construction efficiency of precast pipe piles passing through complex geological layers.
[0054] 2. By setting multiple annular pile tips 3 of different heights on the circular base plate 1, and utilizing the height difference between the multiple annular pile tips 3 in the axial direction of the circular base plate 1, when facing the inclined rock layer 4, the multiple annular pile tips 3 can make sequential contact with the inclined rock layer 4 through the stepped height difference. When facing the inclined rock layer 4 with a large slope, a multi-level interlocking structure can be formed, which strengthens the frictional embedding of the rock layer, effectively improves the ability of the pile tip to interlock with the rock layer, and avoids the pile body tilting and breaking due to insufficient interlocking force of the pipe pile tip structure, thus resulting in a waste pile.
[0055] 3. By using ring-shaped pipes for processing, the number of parts is reduced, the welding length is shortened, the structure of the pipe pile tip is optimized, the manufacturing cost is reduced, and the manufacturing efficiency is improved.
[0056] Of course, for those skilled in the art, other structures and working principles of the pipe pile tip structure are understandable and achievable, and will not be described in detail in this utility model.
[0057] Although specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.
Claims
1. A pipe pile tip structure comprising a circular base plate (1), characterized in that, The bottom of the circular base plate (1) is provided with a pile tip spike (2), one end of which is connected to the circular base plate (1) and located on the central axis of the circular base plate (1); multiple annular pile tips (3) are provided along the radial direction of the circular base plate (1), and the multiple annular pile tips (3) extend from the bottom of the circular base plate (1) away from the circular base plate (1). There is a height difference between the multiple annular pile tips (3) in the axial direction of the circular base plate (1). When facing the inclined rock layer (4), the multiple annular pile tips (3) make sequential contact with the inclined rock layer (4) through the stepped height difference to form a multi-level interlocking structure.
2. A pipe pile tip structure according to claim 1, wherein The plurality of annular pile tips (3) include at least a first annular pile tip (31) and a second annular pile tip (32) arranged radially outward along the circular base plate (1), wherein the first annular pile tip 313 and the second annular pile tip 323 have different heights to form a stepped structure.
3. A pipe pile tip structure according to claim 2, wherein The height of the pile tip spike (2) is greater than the height of the first annular pile tip (31) and the second annular pile tip (32). During construction, the pile tip spike (2) preferentially contacts the inclined rock layer (4).
4. A pipe pile tip structure according to claim 3, wherein The pile tip spike (2) has a cross-shaped structure. The cross-shaped structure extends outward from the bottom surface of the circular base plate (1). In the radial direction of the circular base plate (1), the cross-shaped structure connects the pile tip spike (2) with the first annular pile tip (31). The cone head of the cross-shaped structure serves as the head of the pile tip spike (2) and preferentially contacts the inclined rock layer (4).
5. A pipe pile tip structure according to claim 2, wherein The ends of the first annular pile tip (31) and the second annular pile tip (32) are each provided with serrations (33) along their respective circumferential directions.
6. A pipe pile tip structure according to claim 5, wherein The saw teeth (33) are in the shape of isosceles triangles, and the wedge angle of the saw teeth (33) is 50 degrees to 90 degrees.
7. A pipe pile tip structure according to claim 2, wherein The height of the first annular pile tip (31) is greater than the height of the second annular pile tip (32).
8. A pipe pile tip structure according to claim 2, wherein The height of the first annular pile tip (31) is less than the height of the second annular pile tip (32).
9. A pipe pile tip structure according to claim 2, wherein Multiple ribs (5) are provided between the first annular pile tip (31) and the second annular pile tip (32).
10. A pipe pile tip structure according to claim 2, wherein The height difference between the first annular pile tip (31) and the second annular pile tip (32) is 50mm to 100mm.