Civil engineering hollow pile

Abstract

The invention relates to the technical field of hollow piles for engineering, and discloses a civil engineering hollow pile which comprises hollow pile bodies, a splicing pile is assembled between every two vertically-adjacent hollow pile bodies, a rotating ring is movably arranged between every two vertically-adjacent splicing pile bodies, and an axial positioning shaft is matched with an axial positioning hole in an inserted mode. The radial positioning shaft is used for being in radial insertion fit with the radial positioning hole, axial bevel gears are concentrically installed at the top end and the bottom end of the shaft barrel respectively, and the rotating ring rotates to drive the two sets of axial bevel gears to rotate, so that the radial positioning shaft moves outwards along the diameter. According to the civil engineering hollow pile, through the arrangement of the spliced hollow pile bodies, batch machining of the hollow pile bodies, transportation of the hollow pile bodies and flexible adjustment of the height of the hollow pile bodies on a construction site are facilitated, and the hollow pile bodies and the spliced pile bodies are axially limited and radially limited correspondingly, so that compared with a whole long hollow pile, the hollow pile bodies and the spliced pile bodies are not prone to deformation; the stability, the fracture resistance and the inclination resistance are better.

Description

Technical Field

[0001] The invention relates to the technical field of hollow piles for engineering, in particular to a hollow pile for civil engineering. Background Art

[0002] Hollow piles, also known as hollow pipe piles, are a tubular structure with a cavity inside. Pile foundation, as a means of foundation treatment, has a good effect on controlling the amount of foundation settlement and settlement rate in deep soft soil areas and reducing foundation vibration caused by upper loads. Hollow piles are generally made in molds. During on-site installation, the hollow piles are placed in the predetermined position by hoisting and then connected and fixed to the foundation structure by grouting or welding.

[0003] During the construction of civil engineering, when the foundation is deep and the pile height is not enough, since the hollow piles are prefabricated, the height of the hollow piles cannot be adjusted. If the hollow piles are directly combined upward to increase the height of the pile body, this method is easy to cause disconnection and twisting at the position between the two hollow piles, affecting the supporting strength of the pile body. Therefore, we made improvements on this and proposed a civil engineering hollow pile. Summary of the invention

[0004] In view of the problem that the existing hollow piles are not high enough and are not convenient for stable stacking and combination use, the present invention is proposed.

[0005] Therefore, the purpose of the present invention is to provide a civil engineering hollow pile, which aims to: by arranging spliced ​​hollow piles, it is not only convenient for batch processing of hollow piles, convenient for transportation of hollow piles, and convenient for flexible adjustment of the height of hollow piles at the construction site, but also the hollow pile body and the spliced ​​piles are axially limited and radially limited respectively, so that the stability, anti-fracture and anti-distortion performance are better.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: A civil engineering hollow pile, comprising a hollow pile body, wherein a splicing pile is installed between two adjacent hollow pile bodies;

[0007] The spliced ​​pile comprises two groups of spliced ​​pile bodies, a rotating ring is movably arranged between the upper and lower groups of spliced ​​pile bodies, an annular seat is concentrically installed at one end of the spliced ​​pile body close to the rotating ring, and a plurality of axial positioning shafts are installed in an annular array on the side of the annular seat away from the rotating ring, the top and bottom ends of the hollow pile body are respectively provided with a plurality of axial positioning holes in an annular array, the axial positioning shafts are plugged and matched with the axial positioning holes, the side walls of the spliced ​​pile body are provided with a plurality of radial positioning shafts in an annular array, the top side walls and the bottom side walls of the hollow pile body are respectively provided with a plurality of radial positioning holes in an annular array, the radial positioning shafts are used to radially plug and match with the radial positioning holes, a shaft cylinder is arranged at the axial center position of the rotating ring, and axial bevel gears are concentrically installed on the top and bottom ends of the shaft cylinder, and the rotating ring rotates to drive the two groups of axial bevel gears to rotate, so that the radial positioning shaft moves outward along the diameter.

[0008] As a preferred solution for the civil engineering hollow piles described in the present invention, a T-shaped slide groove with a T-shaped cross-section is provided on the side of the annular seat close to the rotating ring, and the top and bottom ends of the rotating ring have T-shaped cross-sections respectively, so as to cooperate with the upper and lower T-shaped slide grooves in circular sliding.

[0009] As a preferred solution of the civil engineering hollow pile described in the present invention, the side wall of the axial bevel gear is provided with a threaded structure, the axial bevel gear is threadedly screwed with the inner wall of the spliced ​​pile body, the radial positioning shaft is concentrically installed with a radial bevel gear at one end close to the shaft cylinder, the radial bevel gear is meshed with the axial bevel gear, a plurality of threaded sleeves are installed in an annular array on the inner wall of the spliced ​​pile body, and the radial positioning shaft is threadedly screwed with the corresponding threaded sleeves.

[0010] As a preferred solution of the civil engineering hollow pile described in the present invention, the side wall of the shaft cylinder is provided with a plurality of axial grooves in a circular array, the inner wall of the rotating ring is provided with a plurality of limit rods in a circular array, and the limit rods are inserted into the axial grooves at one end close to the shaft cylinder.

[0011] As a preferred solution of the civil engineering hollow pile described in the present invention, one of the axial bevel gears is located at the top of the upper spliced ​​pile body, and the other axial bevel gear is located between the two spliced ​​pile bodies, so that the two axial bevel gears move axially downward at the same time, and the radial positioning axes of the two groups of spliced ​​pile bodies move radially outward.

[0012] As a preferred solution of the civil engineering hollow pile described in the present invention, an umbrella-shaped funnel is concentrically installed on one end of the axial bevel gear away from the spliced ​​pile body, and a plurality of cylinder seats are embedded and installed in a ring array on the side of the umbrella-shaped funnel away from the axial bevel gear, and reinforcing steel bars are inserted in the cylinder seats, and the reinforcing steel bars are fixed to the inner wall of the hollow pile body.

[0013] As a preferred solution of the civil engineering hollow pile of the present invention, the middle of the axial bevel gear is provided with an axial hole connected to the shaft cylinder, and the side wall of the shaft cylinder is provided with a plurality of connecting openings in a ring array.

[0014] As a preferred solution of the civil engineering hollow pile described in the present invention, when the radial positioning shaft is not in use, one end of the radial positioning shaft away from the radial bevel gear is located at the through hole of the spliced ​​pile body, and the radial bevel gear is located away from the screw sleeve.

[0015] As a preferred solution of the civil engineering hollow pile described in the present invention, the outer diameter of the spliced ​​pile body is equal to the inner diameter of the hollow pile body, the spliced ​​pile body and the end of the hollow pile body are plugged together, the outer diameter of the annular seat is equal to the outer diameter of the hollow pile body, and the annular seat and the end of the hollow pile body are against each other.

[0016] Beneficial effects of the present invention:

[0017] 1. The present invention, by arranging spliced ​​hollow piles, is not only convenient for batch processing of hollow piles, but also for transportation of hollow piles and flexible adjustment of the height of hollow piles at the construction site. In addition, the hollow pile body and the spliced ​​piles are respectively axially limited and radially limited, so that compared with a whole long hollow pile, the stability, fracture resistance and deflection resistance are better.

[0018] 2. The present invention designs the axial bevel gear and the radial bevel gear so that the radial bevel gear moves radially while the axial bevel gear moves vertically. At the same time, the teeth at the bottom of the axial bevel gear are always meshed with the radial bevel gear, so that when the rotating ring is rotated clockwise or counterclockwise, the radial positioning shafts of the upper and lower groups of the spliced ​​piles can move radially outward at the same time. At the same time, the radial positioning shaft is matched with the thread of the screw sleeve to position and control the radial movement position of the radial positioning shaft, thereby ensuring the stability of the assembly between the hollow pile body and the spliced ​​pile.

[0019] 3. The present invention, by adding reinforcing steel bars, not only simplifies the assembly method, but also can further improve the overall support strength of the hollow pile.

[0020] 4. The present invention, by adding an umbrella-shaped funnel structure, can better guide the fluidity of concrete pouring when concrete needs to be poured in the hollow pile. By designing the structure of the connecting port, it can ensure that the spliced ​​pile is filled with concrete, improve the uniformity of the hollow pile concrete filling, and improve the usability of the hollow pile. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0022] in:

[0023] Figure 1 It is a structural schematic diagram of the splicing state of the civil engineering hollow pile of the present invention.

[0024] Figure 2 It is a schematic cross-sectional structure diagram of the splicing state of the civil engineering hollow pile of the present invention.

[0025] Figure 3 It is a structural schematic diagram of a spliced ​​pile of a civil engineering hollow pile according to the present invention.

[0026] Figure 4 It is a schematic diagram of the installation structure of the shaft cylinder, axial bevel gear and umbrella-shaped funnel of the civil engineering hollow pile of the present invention.

[0027] Figure 5 The present invention is a cross-sectional structural schematic diagram of the installation of the shaft cylinder, axial bevel gear and umbrella-shaped funnel of the civil engineering hollow pile.

[0028] Figure 6 It is a structural schematic diagram of the hollow pile body of the civil engineering hollow pile of the present invention.

[0029] Figure 7 It is a structural schematic diagram of a spliced ​​pile body of a civil engineering hollow pile according to the present invention.

[0030] Figure 8 It is a schematic cross-sectional structure diagram of a spliced ​​pile body of a civil engineering hollow pile according to the present invention.

[0031] Fig. 9 It is a schematic cross-sectional structural diagram of the installation of a hollow pile body and a spliced ​​pile body of a civil engineering hollow pile of the present invention.

[0032] Fig.10 It is a schematic cross-sectional view of a spliced ​​pile of a civil engineering hollow pile according to the present invention.

[0033] Description of reference numerals:

[0034] 1. Hollow pile body; 11. Axial positioning hole; 12. Radial positioning hole;

[0035] 2. Spliced ​​pile; 21. Spliced ​​pile body; 211. Screw sleeve; 212. Radial positioning shaft; 213. Radial bevel gear; 22. Annular seat; 221. Axial positioning shaft; 222. T-shaped slideway; 23. Rotating ring; 24. Shaft cylinder; 241. Axial groove; 242. Connecting port; 25. Limit rod; 26. Axial bevel gear; 27. Umbrella-shaped funnel; 28. Cylinder seat;

[0036] 3. Strengthen the steel bars. DETAILED DESCRIPTION

[0037] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0038] Example 1

[0039] Reference Figure 1-10 , which is the first embodiment of the present invention, provides a civil engineering hollow pile, the civil engineering hollow pile comprises a hollow pile body 1, and a splicing pile 2 is installed between two upper and lower adjacent hollow pile bodies 1;

[0040] The spliced ​​pile 2 includes two groups of spliced ​​pile bodies 21, a rotating ring 23 is movably arranged between the upper and lower groups of spliced ​​pile bodies 21, an annular seat 22 is concentrically installed on one end of the spliced ​​pile body 21 close to the rotating ring 23, and a plurality of axial positioning shafts 221 are installed in a circular array on the side of the annular seat 22 away from the rotating ring 23. The top and bottom ends of the hollow pile body 1 are respectively provided with a plurality of axial positioning holes 11 in a circular array, and the axial positioning shafts 221 are plugged and matched with the axial positioning holes 11 to locate the axial position between the spliced ​​pile 2 and the hollow pile body 1 at the top and the hollow pile body 1 at the bottom, so as to reduce the occurrence of misalignment of the upper and lower hollow pile bodies 1 when splicing; the side wall of the spliced ​​pile body 21 is provided with a plurality of radial positioning shafts 212 in a circular array, and the top side wall and the bottom side wall of the hollow pile body 1 are respectively provided with a plurality of radial positioning shafts 212 in a circular array A plurality of radial positioning holes 12 are provided, and the radial positioning shafts 212 are used for radial plug-in cooperation with the radial positioning holes 12. The plurality of radial positioning shafts 212 in an annular array at the top of the spliced ​​pile 2 are radially plugged into the hollow pile body 1, and the plurality of radial positioning shafts 212 in an annular array at the bottom of the spliced ​​pile 2 are radially plugged into the hollow pile body 1 below, thereby reducing the occurrence of skewness between the hollow pile bodies 1 spliced ​​up and down. A shaft cylinder 24 is provided at the axial position of the rotating ring 23, and axial bevel gears 26 are concentrically installed on the top and bottom ends of the shaft cylinder 24, respectively. The rotating ring 23 rotates to drive the two groups of axial bevel gears 26 to rotate, so that the radial positioning shafts 212 move outward along the diameter. When the rotating ring 23 is controlled to rotate, the two groups of spliced ​​pile bodies 21 and the upper and lower hollow pile bodies 1 need to be controlled to be positioned and immobile.

[0041] The outer diameter of the spliced ​​pile body 21 is equal to the inner diameter of the hollow pile body 1, the spliced ​​pile body 21 is plugged into the end of the hollow pile body 1, the outer diameter of the annular seat 22 is equal to the outer diameter of the hollow pile body 1, the annular seat 22 is abutted against the end of the hollow pile body 1, and the axial plug-in limit is further utilized to improve the tightness and stability of the upper and lower hollow pile bodies 1 when spliced ​​through the spliced ​​pile 2.

[0042] In this embodiment, when the depth of the foundation is deep, a batch of hollow pile bodies 1 and a number of spliced ​​piles 2 are used as preparation materials for adjusting the height of the piles. After first confirming the depth of the foundation, the amount of hollow pile bodies 1 and the amount of spliced ​​piles 2 are determined, and then the spliced ​​piles 2 are assembled between the two hollow pile bodies 1, wherein the hollow pile body 1 does not use the molecular mother end, and the spliced ​​pile 2 only needs to ensure that the large horizontal surface of the axial bevel gear 26 faces upward. The assembly steps of any two hollow pile bodies 1 and the spliced ​​pile 2 are: by respectively putting the two hollow pile bodies 1 on the top and bottom ends of the spliced ​​pile 2, ensuring that the axial positioning shaft 221 and the axial positioning hole 11 are aligned and plugged, and then controlling the two hollow pile bodies 1 and the spliced ​​pile body 21 to remain stationary, and rotating the rotating ring 23 in a circle so that the corresponding two axial bevel gears 26 It rotates downward in a circle, thereby driving the radial positioning shaft 212 circumferentially distributed on the top of the spliced ​​pile 2 to move outward, and the radial positioning shaft 212 circumferentially distributed on the bottom of the spliced ​​pile 2 to move outward, so that the radial positioning shaft 212 is radially plugged into the radial positioning hole 12, thereby completing the splicing of the two hollow pile bodies 1. Similarly, several hollow pile bodies 1 can be spliced ​​together in this way according to the height. After splicing to the required height, the spliced ​​hollow piles are inserted into the foundation for construction. By constructing the hollow piles in a splicing manner, it is not only convenient for batch processing of hollow piles, but also for transportation of hollow piles and flexible adjustment of the height of hollow piles at the construction site. Moreover, the setting of the spliced ​​piles 2 makes the spliced ​​hollow piles have better stability, fracture resistance and deflection resistance than a whole long hollow pile.

[0043] Example 2

[0044] Reference Figure 1-10 , which is the second embodiment of the present invention, and this embodiment is different from the first embodiment in that:

[0045] A T-shaped groove 222 with a T-shaped cross section is provided on one side of the annular seat 22 close to the rotating ring 23. The top and bottom ends of the rotating ring 23 have T-shaped cross sections respectively, so as to cooperate with the upper and lower T-shaped grooves 222 for circular sliding. The T-shaped structure can ensure that the rotating ring 23 has more stable circular movement.

[0046] The side wall of the axial bevel gear 26 is provided with a threaded structure, and the axial bevel gear 26 is threadedly screwed and connected with the inner wall of the spliced ​​pile body 21. A radial bevel gear 213 is concentrically installed on the end of the radial positioning shaft 212 close to the shaft cylinder 24, and the radial bevel gear 213 meshes with the axial bevel gear 26. A plurality of screw sleeves 211 are installed in an annular array on the inner wall of the spliced ​​pile body 21. The radial positioning shaft 212 is threadedly screwed and connected with the corresponding screw sleeves 211, and the screw sleeve 211 positions the radial positioning shaft 212. When the rotating ring 23 is rotated, the axial bevel gear 26 rotates circumferentially. At the same time, the axial bevel gear 26 moves vertically downward along the thread while threading with the spliced ​​pile body 21, and then meshes with the radial bevel gear 213 that moves radially, so as to drive the radial positioning shaft 212 to rotate circumferentially, so that the radial positioning shaft 212 moves along the screw sleeve 211 toward the outer thread, thereby realizing the radial insertion of the radial positioning shaft 212 and the radial positioning hole 12.

[0047] The side wall of the shaft cylinder 24 is provided with a plurality of axial grooves 241 in an annular array, and the inner wall of the rotating ring 23 is provided with a plurality of limit rods 25 in an annular array. The end of the limit rod 25 close to the shaft cylinder 24 is inserted into the axial groove 241. Due to the insertion of the limit rod 25 and the axial groove 241, the shaft cylinder 24 is controlled to rotate in a circle with the rotating ring 23. The limit rod 25 and the axial groove 241 are vertically slidably matched, so that the threaded screwing connection between the axial bevel gear 26 and the spliced ​​pile body 21 can be carried out smoothly.

[0048] When the radial positioning shaft 212 is not in use, one end of the radial positioning shaft 212 away from the radial bevel gear 213 is located at the through hole of the spliced ​​pile body 21, and the radial bevel gear 213 is located at a position away from the screw sleeve 211. One of the axial bevel gears 26 is located at the top of the upper spliced ​​pile body 21, and the other axial bevel gear 26 is located between the two spliced ​​pile bodies 21, so that the two axial bevel gears 26 move axially downward in a circular motion at the same time, and the radial positioning shafts 212 of the two groups of spliced ​​pile bodies 21 move radially outward. By setting the positions of the two axial bevel gears 26, the rotating ring 23 can be rotated clockwise or counterclockwise, so that the two axial bevel gears 26 rotate downward in a circular motion together, thereby realizing the radial movement of the upper and lower groups of radial positioning shafts 212 of the spliced ​​pile 2.

[0049] In this embodiment, the axial bevel gear 26 and the radial bevel gear 213 are designed so that the radial bevel gear 213 moves radially while the axial bevel gear 26 moves vertically. At the same time, the teeth at the bottom of the axial bevel gear 26 are always meshed with the radial bevel gear 213 to ensure that the rotation of the axial bevel gear 26 drives the rotation of the radial positioning shaft 212. In this way, the radial positioning shaft 212 can be moved radially, and the threaded cooperation between the radial positioning shaft 212 and the screw sleeve 211 can be used to position and control the radial movement position of the radial positioning shaft 212, thereby ensuring the stability of the assembly between the hollow pile body 1 and the spliced ​​pile 2.

[0050] The remaining structures are the same as those of Example 1.

[0051] Example 3

[0052] Reference Figure 1-10 , which is the third embodiment of the present invention, and this embodiment is different from the second embodiment in that:

[0053] An umbrella-shaped funnel 27 is concentrically installed at one end of the axial bevel gear 26 away from the spliced ​​pile body 21, and a plurality of cylinder seats 28 are embedded and installed in an annular array on one side of the umbrella-shaped funnel 27 away from the axial bevel gear 26. Reinforcing steel bars 3 are inserted in the cylinder seats 28, and the reinforcing steel bars 3 are fixed to the inner wall of the hollow pile body 1. When at least three hollow pile bodies 1 are spliced, that is, two groups of spliced ​​piles 2 are used, the two ends of the reinforcing steel bars 3 in the annular array are respectively inserted and installed with the cylinder seats 28 corresponding to the two groups of spliced ​​piles 2. For the reinforcing steel bars 3 in the uppermost hollow pile body 1, the end of the reinforcing steel bars 3 away from the spliced ​​pile 2 is fixedly welded to the top inner wall of the hollow pile body 1. For the reinforcing steel bars 3 in the lowermost hollow pile body 1, the end of the reinforcing steel bars 3 away from the spliced ​​pile 2 is fixedly welded to the bottom inner wall of the hollow pile body 1. The provision of the reinforcing steel bars 3 can increase the strength of the hollow pile and improve the stability of the hollow pile when used in a deeper foundation.

[0054] An axial hole connected to the shaft cylinder 24 is provided in the middle of the axial bevel gear 26, and a plurality of connecting ports 242 are provided on the side wall of the shaft cylinder 24 in a ring array. When it is necessary to pour concrete into the hollow pile in some special cases, concrete is poured into the hollow pile, and the concrete enters the umbrella-shaped funnel 27 from the hollow pile body 1, and is then introduced into the shaft cylinder 24 by the umbrella-shaped funnel 27. Then, a portion of the concrete continues to be discharged from the umbrella-shaped funnel 27 at the bottom, and another portion of the concrete enters between the upper and lower umbrella-shaped funnels 27 through the connecting port 242, so as to fix the positions of the rotating ring 23 and the axial bevel gear 26, so that the hollow pile is filled with concrete, thereby further improving the stability and supporting strength of the hollow pile.

[0055] In this embodiment, by improving the structure of the spliced ​​pile 2 to add the structure of the umbrella-shaped funnel 27, the fluidity of the concrete pouring can be better guided. By designing the structure of the connecting port 242, it can be ensured that the spliced ​​pile 2 is filled with concrete, the uniformity of the hollow pile concrete filling is improved, and the usability of the hollow pile is improved.

[0056] The remaining structure is the same as that of Example 2.

[0057] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A civil engineering hollow pile, characterized in that: It comprises a hollow pile body (1), wherein a splicing pile (2) is arranged between two adjacent hollow pile bodies (1) above and below; The spliced ​​pile (2) comprises two groups of spliced ​​pile bodies (21) in an upper and lower manner, a rotating ring (23) is movably arranged between the two groups of spliced ​​pile bodies (21), an annular seat (22) is coaxially arranged at one end of the spliced ​​pile body (21) close to the rotating ring (23), a plurality of axial positioning shafts (221) are arranged in an annular array at the side of the annular seat (22) away from the rotating ring (23), a plurality of axial positioning holes (11) are respectively arranged at the top and bottom ends of the hollow pile body (1) in an annular array, the axial positioning shafts (221) are plugged into and matched with the axial positioning holes (11), and the spliced ​​pile body (21) The side wall of the hollow pile (1) is provided with a plurality of radial positioning shafts (212) in an annular array, the top side wall and the bottom side wall of the hollow pile body (1) are respectively provided with a plurality of radial positioning holes (12) in an annular array, the radial positioning shafts (212) are used for radial plug-in cooperation with the radial positioning holes (12), a shaft cylinder (24) is provided at the axial center position of the rotating ring (23), the top and bottom ends of the shaft cylinder (24) are respectively concentrically mounted with axial bevel gears (26), the rotating ring (23) rotates to drive the two sets of axial bevel gears (26) to rotate, so that the radial positioning shafts (212) move outward along the diameter.

2. A civil engineering hollow pile according to claim 1, characterized in that: A T-shaped slide groove (222) with a T-shaped cross section is provided on one side of the annular seat (22) close to the rotating ring (23); the top and bottom ends of the rotating ring (23) are respectively T-shaped in cross section, so as to be circumferentially slidably matched with the upper and lower T-shaped slide grooves (222).

3. A civil engineering hollow pile according to claim 2, characterized in that: The side wall of the axial bevel gear (26) is provided with a thread structure, and the axial bevel gear (26) is threadedly screwed to the inner wall of the spliced ​​pile body (21). A radial bevel gear (213) is coaxially mounted on one end of the radial positioning shaft (212) close to the shaft cylinder (24), and the radial bevel gear (213) is meshed with the axial bevel gear (26). A plurality of screw sleeves (211) are mounted on the inner wall of the spliced ​​pile body (21) in an annular array, and the radial positioning shaft (212) is threadedly screwed to the corresponding screw sleeves (211).

4. A civil engineering hollow pile according to claim 3, characterized in that: The side wall of the shaft cylinder (24) is provided with a plurality of axial grooves (241) in an annular array, and the inner wall of the rotating ring (23) is provided with a plurality of limiting rods (25) in an annular array, wherein one end of the limiting rod (25) close to the shaft cylinder (24) is inserted into the axial groove (241).

5. A civil engineering hollow pile according to claim 4, characterized in that: One of the axial bevel gears (26) is located at the top of the upper spliced ​​pile body (21), and the other axial bevel gear (26) is located between the two spliced ​​pile bodies (21), so that the two axial bevel gears (26) move axially downward at the same time, and the radial positioning axes (212) of the two groups of spliced ​​pile bodies (21) move radially outward.

6. A civil engineering hollow pile according to claim 5, characterized in that: An umbrella-shaped funnel (27) is coaxially mounted on one end of the axial bevel gear (26) away from the spliced ​​pile body (21), and a plurality of cylinder seats (28) are embedded and mounted in a ring array on one side of the umbrella-shaped funnel (27) away from the axial bevel gear (26). A reinforcing steel bar (3) is inserted into the cylinder seat (28), and the reinforcing steel bar (3) is fixed to the inner wall of the hollow pile body (1).

7. A civil engineering hollow pile according to claim 6, characterized in that: An axial hole communicating with the shaft cylinder (24) is provided in the middle of the axial bevel gear (26), and a plurality of communication openings (242) are provided on the side wall of the shaft cylinder (24) in an annular array.

8. A civil engineering hollow pile according to claim 7, characterized in that: When the radial positioning shaft (212) is not in use, one end of the radial positioning shaft (212) away from the radial bevel gear (213) is located at the through hole of the spliced ​​pile body (21), and the radial bevel gear (213) is located at a position away from the screw sleeve (211).

9. A civil engineering hollow pile according to claim 8, characterized in that: The outer diameter of the spliced ​​pile body (21) is equal to the inner diameter of the hollow pile body (1), the spliced ​​pile body (21) is plugged into and matched with the end of the hollow pile body (1), the outer diameter of the annular seat (22) is equal to the outer diameter of the hollow pile body (1), and the annular seat (22) abuts against the end of the hollow pile body (1).

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