Self-screwing steel structural ground pile

Abstract

This application discloses a self-rotating steel structure pile, comprising a pile tube and spiral blades wound around the outer circumference of the pile tube and extending along the axial direction of the pile tube. At least two spiral blades are evenly distributed on the outer circumference of the pile tube, and the ratio of the pitch P to the outer diameter R of a single spiral blade is 1.4-2.8. By optimizing the ratio of the pitch P to the outer diameter R of a single spiral blade and further optimizing the angle of the spiral blades, this pile can generate a self-rotating force when driven into the ground. Construction can be achieved using a conventional excavator breaker, simplifying operation and saving construction costs. During the pile driving process, only a downward impact force is applied, and the pile tube is driven into the ground through self-rotation, avoiding bending caused by the ground reaction force on the entire pile during driving. This also makes the soil layer more compact, increasing the hardness of the soil at the pile driving point, ensuring the soil layer is not loose, and guaranteeing stability and bearing capacity during long-term use after being driven into the ground.

Description

Technical Field

[0001] This application relates to the field of building materials technology, and in particular to a self-spiraling steel structure ground pile. Background Technology

[0002] Ground piles are widely used in engineering construction, including housing construction, railway engineering, and rural fencing, serving as crucial for the load-bearing capacity and stability of buildings. With the increasing demand for innovation in the construction market, construction is developing towards higher efficiency, speed, and quality. Prefabricated construction, as a new building form, improves construction efficiency, shortens construction cycles, and plays a vital role in controlling construction quality while ensuring orderly on-site construction management. In the field of prefabricated construction, ground piles, as key components for the load-bearing capacity and stability of buildings, make improving their structural stability paramount.

[0003] The applicant's utility model patent application filed on June 13, 2022, with Chinese patent application number 202221453223X, discloses a steel structure helical body and a helical ground pile, comprising: a steel pipe and at least two fins, each of which is wound around the circumference of the steel pipe and extends along the axial direction of the steel pipe, thereby spirally wound around the outer surface of the steel pipe; and the applicant's utility model patent application filed on October 21, 2022, with Chinese patent application number 2022227793933, discloses a steel structure ground pile, comprising: a ground pile body and at least two fins, each of which is spirally wound around the outer surface of the ground pile body, the ground pile body having an internal grouting cavity, the upper end face of which has a grouting port communicating with the grouting cavity, and the outer surface of the ground pile body having a plurality of overflow holes communicating with the grouting cavity.

[0004] However, the above-mentioned patents all have the following shortcomings: When driving the piles into the ground, a rotational force needs to be applied to drive the piles into the soil. Specific equipment is required to complete the construction well. Furthermore, this construction method requires both downward pressure and rotational force to drive the piles in smoothly. Excessive pressure can easily cause the fins to deform or even be damaged, while insufficient pressure and rotational force will bring out the soil layer and loosen the interior, leading to instability of the pile body. Summary of the Invention

[0005] In view of the above problems, this application provides a self-helical steel structure ground pile, which can be installed underground by applying only axial impact force, and has better stability.

[0006] In a first aspect, this application provides a self-spiraling steel structure pile, including a pile tube and a spiral blade wound around the outer periphery of the pile tube and extending along the axial direction of the pile tube. At least two spiral blades are evenly distributed on the outer periphery of the pile tube, and the ratio of the pitch P to the outer diameter R of a single spiral blade is 1.4-2.8.

[0007] In some implementations, the helical angle θ formed by the helical blade and the axial angle of the pile pipe is 115°-145°.

[0008] In some implementations, the lower end of the spiral blade extends to the lower end of the pile pipe.

[0009] In some implementations, the lower end of the pile pipe is provided with a cone, and the lower end of the spiral blade extends to the upper end of the cone.

[0010] In some implementations, an installation plate is connected to the top of the pile pipe.

[0011] In some implementations, the upper end of the pile pipe is provided with a pile head, which is sleeved on the upper end of the pile pipe.

[0012] In some implementations, a number of connecting pieces are welded together between the outer periphery of the pile pipe and the inner wall of the pile head.

[0013] In some implementations, the upper part of the spiral blade is fitted inside the pile head, and the spiral blade inside the pile head is welded to the inner wall of the pile head.

[0014] In some implementations, the inner diameter of the pile head is larger than the inner diameter of the spiral blade, the outer diameter of the pile head is smaller than the outer diameter of the spiral blade, and the pile head is provided with a connecting groove corresponding to the spiral blade, and the spiral blade is embedded in the connecting groove and fixedly connected to the pile head.

[0015] In some implementations, an installation plate is provided on the upper end face of the pile body, located outside the injection port.

[0016] The beneficial effects of this invention are as follows: By optimizing the ratio of the pitch P to the outer diameter R of a single spiral blade and further optimizing the angle of the spiral blade, the ground pile can generate a self-rotating force when driven into the ground. The ground pile can be constructed using a conventional excavator breaker hammer, which is simple to operate and saves construction costs. During the pile driving process, since only a downward impact force is applied and the pile pipe is driven into the ground through self-rotation, the ground pile as a whole is prevented from bending due to the reaction force of the ground during the pile driving process. It also makes the soil layer more compact, which can improve the hardness of the soil at the pile driving point, ensure that the soil layer is not loose, and guarantee the stability and bearing capacity during long-term use after being driven into the ground.

[0017] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0018] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0019] Figure 1 This is a structural schematic diagram provided by an embodiment of a self-spiral steel structure ground pile of this application;

[0020] Figure 2 This is a schematic diagram of parameters provided in an embodiment of a self-spiral steel structure ground pile of this application;

[0021] Figure 3 This is a structural schematic diagram of another embodiment of a self-helical steel structure ground pile provided in this application;

[0022] Figure 4 This is a schematic diagram of another embodiment of a self-helical steel structure ground pile provided in this application;

[0023] Figure 5 This is a partial structural schematic diagram of an embodiment of a self-spiral steel structure ground pile provided in this application.

[0024] The reference numerals in the detailed embodiments are as follows:

[0025] 1. Pipe; 2. Spiral blade; 11. Cone head; 3. Pipe head; 31. Connecting plate; 32. Connecting groove; 4. Mounting plate. Detailed Implementation

[0026] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0028] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0029] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0030] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0031] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple groups" refers to two or more (including two groups), and "multiple pieces" refers to two or more (including two pieces).

[0032] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to 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 the embodiments of this application.

[0033] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0034] A self-spiral steel structure pile includes a pile tube 1 and a spiral blade 2 wound around the outer circumference of the pile tube 1 and extending along the axial direction of the pile tube 1. At least two spiral blades 2 are evenly distributed on the outer circumference of the pile tube 1, and the ratio of the pitch P to the outer diameter R of a single spiral blade 2 is 1.4-2.8.

[0035] If two spiral blades 2 are set, they will be offset by half a pitch in the axial direction of the pile pipe 1; if four spiral blades 2 are set, they will be offset by a quarter pitch in the axial direction of the pile pipe 1, and so on.

[0036] The self-spiral steel structure ground pile of this application can be constructed using the commonly available excavator breaker (a breaker is mounted on the excavator's mechanical arm), without the need for specially designed construction equipment. Furthermore, the telescopic arm of the excavator breaker can be used to construct ground piles of different heights. The telescopic mechanical arm can meet the needs of construction in various complex terrains, and it has the characteristics of low construction difficulty and low construction cost, which is conducive to the promotion and application of the product.

[0037] The system allows for the direct installation of a vibratory pile driver on the pile pipe 1 or pile head 3. The vibratory pile driver is connected to an air source via a pipeline, enabling pile driving operations on various terrains, including slopes and vertical surfaces, as long as the vibration impact direction of the pile driver is directed towards the axial front end of the pile pipe 1 or pile head 3.

[0038] According to some embodiments of this application, the helix angle θ formed by the axial angle between the helical blade 2 and the pile pipe 1 is 115°-145°. The helix angle θ can be set to 135° as needed.

[0039] The pitch P and outer diameter R of a single spiral blade 2. Pitch P refers to the distance between two adjacent threads measured along the helical direction, that is, the vertical distance formed by the spiral blade 2 to form a complete helix. Outer diameter R refers to the maximum distance span of the spiral blade 2 perpendicular to the axial direction of the pile pipe 1.

[0040] The helix angle θ refers to the obtuse angle formed by the helical extension direction of the helical blade 2 along the axial direction of the pile pipe 1 and the axial direction of the pile pipe 1, that is, the supplementary angle of the helical rise angle of the helical blade 2. The helix angle θ is the angle formed by the helical blade 2 and the axis of the lower end of the pile pipe 1, i.e., the cone end.

[0041] The ratio of the pitch P to the outer diameter R, as well as the control of the included angle of the spiral blade 2, can ensure that the ground pile can be driven into the ground by self-rotation when only downward vibration impact force is applied. If the ratio or angle is too small, it will not be conducive to vibration impact, it will not be easy to self-rotate and drive in, or it may even be impossible to drive in, and the spiral blade 2 will deform or break. If the angle is too large, the overall bearing capacity of the ground pile will be insufficient, which will not meet the construction requirements, and it will also be detrimental to the production and processing of the ground pile.

[0042] The angle between the pile pipe 1 and the spiral blade 2 is usually set to 90 degrees, but in special cases it can be greater or less than 90 degrees.

[0043] According to some embodiments of this application, the lower end of the spiral blade 2 extends to the lower end of the pile pipe 1.

[0044] According to some embodiments of this application, the lower end of the pile pipe 1 is provided with a cone head 11, and the lower end of the spiral blade 2 extends to the upper end of the cone head 11.

[0045] The cone head 11 can be integrally formed with the pile pipe 1 or obtained by welding, or it can be obtained by beveling the lower end of the steel pipe. This makes it easier to drive the pile into the hard ground and provides an active downward force during the downward movement of the pile, thereby improving the efficiency and positional accuracy of pile driving.

[0046] According to some embodiments of this application, the top end of the pile pipe 1 is connected to an installation plate 4.

[0047] According to some embodiments of this application, the upper end of the pile pipe 1 is provided with a pile head 3, and the pile head 3 is sleeved on the upper end of the pile pipe 1.

[0048] According to some embodiments of this application, a plurality of connecting pieces 31 are provided between the outer periphery of the pile pipe 1 and the inner wall of the pile head 3 and welded together.

[0049] According to some embodiments of this application, the upper part of the spiral blade 2 is sleeved inside the pile head 3, and the spiral blade 2 inside the pile head 3 is welded to the inner wall of the pile head 3.

[0050] According to some embodiments of this application, the inner diameter of the pile head 3 is larger than the inner diameter of the spiral blade 2, the outer diameter of the pile head 3 is smaller than the outer diameter of the spiral blade 2, the pile head 3 is provided with a connecting groove 32 corresponding to the spiral blade 2, and the spiral blade 2 is embedded in the connecting groove 32 and fixedly connected to the pile head 3.

[0051] This connection method can improve the connection strength between the pile head 3 and the pile pipe 1, and no additional structure is required; it can be completed by direct welding.

[0052] To further strengthen the connection between the pile head 3 and the pile pipe 1, a connecting piece 31 can be added to the pile pipe 1 between the spiral blades 2, and a corresponding connecting groove 32 can be set on the pile head 3 for welding connection.

[0053] According to some embodiments of this application, an installation plate 4 is provided on the upper end face of the pile body and outside the injection port.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A self-helical steel structure ground pile, characterized in that, It includes a pile tube (1) and a spiral blade (2) wrapped around the outer periphery of the pile tube (1) and extending along the axial direction of the pile tube (1). At least two spiral blades (2) are evenly distributed on the outer periphery of the pile tube (1). The ratio of the pitch P to the outer diameter R of a single spiral blade (2) is 1.4-2.

8. The spiral angle θ formed by the spiral blade (2) and the axial direction of the pile tube (1) is 135°-145°.

2. The self-helical steel structure ground pile according to claim 1, characterized in that, The lower end of the spiral blade (2) extends to the lower end of the pile pipe (1).

3. The self-spiraling steel structure ground pile according to claim 1, characterized in that, The lower end of the pile pipe (1) is provided with a cone head (11), and the lower end of the spiral blade (2) extends to the upper end of the cone head (11).

4. A self-spiraling steel structure ground pile according to claim 1, characterized in that, The top of the pile pipe (1) is connected to an installation plate (4).

5. A self-spiraling steel structure ground pile according to claim 1, characterized in that, The upper end of the pile pipe (1) is provided with a pile head (3), and the pile head (3) is sleeved on the upper end of the pile pipe (1).

6. A self-spiraling steel structure ground pile according to claim 5, characterized in that, Several connecting pieces (31) are welded together between the outer periphery of the pile pipe (1) and the inner wall of the pile head (3).

7. A self-spiraling steel structure ground pile according to claim 5, characterized in that, The upper part of the spiral blade (2) is sleeved inside the pile head (3), and the spiral blade (2) inside the pile head (3) is welded to the inner wall of the pile head (3).

8. A self-spiraling steel structure ground pile according to claim 5, characterized in that, The inner diameter of the pile head (3) is larger than the inner diameter of the spiral blade (2), and the outer diameter of the pile head (3) is smaller than the outer diameter of the spiral blade (2). The pile head (3) is provided with a connecting groove (32) corresponding to the spiral blade (2). The spiral blade (2) is embedded in the connecting groove (32) and fixedly connected to the pile head (3).

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