A bored pile hole mouth protection device

Abstract

The utility model provides a cast-in-place bored pile hole mouth protection device, belongs to the pile hole protection technical field, include: half protection structure, half arc port, fixed base, rotating seat, first connecting seat and second connecting seat, half protection structure is provided with two groups, and two groups half protection structure split type design, two groups half protection structure correspond to set up before and after, half arc port is opened in half protection structure middle part, fixed base is provided with two, and two fixed base is fixedly installed respectively in the right side upper and lower ends of rear half protection structure, the utility model discloses two split type half protection structures, and the integrated protection structure of pile hole is formed after assembling, and the problem of the friction of the pile hole caused by dragging is avoided, the universal wheel of half protection structure bottom end can be placed protection device conveniently and accurately without additional lifting appliance, and the operating efficiency is improved, and two groups half protection structure can complete the spacing or spacing disengagement operation of two point positions of butt joint place synchronously, and the assembly efficiency is improved greatly.

Description

Technical Field

[0001] This utility model belongs to the field of pile hole protection technology, specifically relating to a borehole protection device for bored piles. Background Technology

[0002] After the drilling of the cast-in-place pile is completed, the borehole opening needs to be protected. This is mainly to prevent debris from falling into the hole and affecting the quality of the pile, while also preventing the soil around the borehole from collapsing and preventing personnel from approaching and causing safety accidents. It is a necessary measure to ensure the safety of subsequent construction and the quality of pile formation. Appropriate protective structures should be used to achieve effective isolation and warning.

[0003] A related technology (Chinese Patent No. CN222614161U) discloses a borehole opening protection device for bored piles, comprising a protective body, a base frame, a top frame, and multiple side frames between the base frame and the top frame. A cover plate is rotatably connected to the top frame, and a warning component is provided on the cover plate. A through hole is provided on the base frame, located below the cover plate. Multiple fixing rods are provided on the edge of the base frame, and baffles are movably connected to the side frames. The beneficial effects of this utility model are: it can solve the technical problem of insufficient protection effect of existing protective structures on borehole openings, the structure is more robust, less prone to displacement due to external wind forces, etc., improves the protection effect on the borehole opening, and can provide favorable support for the lower part of the guide pipe and the grouting process, ensuring the convenience of pile grouting.

[0004] While the aforementioned protective methods can achieve pile hole protection, their integrated structure means that if the central through-hole of the protective device needs to be aligned with the top of the pile hole, dragging the main body along the ground can easily cause friction between the protective device and the pile hole. If it is moved to the pile hole by hoisting, additional lifting equipment is required. Neither of these methods allows for a quick, convenient, efficient, and precise placement of the protective device at the pile hole location. Utility Model Content

[0005] To address the problem that existing protective devices, which use an integrated structure, are prone to friction with the pile hole when the main body is dragged along the ground to align the central through-hole of the protective device with the top of the pile hole, this invention provides a borehole protection device for bored piles. This device employs a split design with two semi-protective structures. This design eliminates the need to drag the main body of the protective device; instead, the two semi-protective structures are moved to their respective positions and assembled to form an integrated protective structure for the pile hole, effectively avoiding the friction defects caused by dragging. The specific technical solution is as follows:

[0006] A borehole protection device for cast-in-place piles includes: a semi-protective structure, a semi-arc-shaped port, a fixed base, a rotating base, a first connecting base, and a second connecting base. Two sets of semi-protective structures are provided, and the two sets are designed as separate units, with the two sets of semi-protective structures arranged correspondingly front to back. The semi-arc-shaped port is located in the middle of the semi-protective structure. Two fixed bases are provided, and the two fixed bases are respectively fixedly installed at the upper and lower right ends of the rear semi-protective structure. The rotating bases are respectively fixedly installed at the upper and lower right ends of the front semi-protective structure, and the rotating bases are rotatably connected to the fixed bases. Two first connecting bases are provided, and the two first connecting bases are respectively fixedly installed at the upper and lower left ends of the rear semi-protective structure. The second connecting bases are respectively fixedly installed at the upper and lower left ends of the front semi-protective structure.

[0007] An assembly assembly is provided between the first connecting seat and the second connecting seat.

[0008] In the above technical solution, the assembly component includes: a socket, a rod, a positioning hole, and a positioning rod. The socket is opened through the first connecting seat from front to back. The rod is fixed and vertically installed on the rear side wall of the second connecting seat, and the rod is embedded in the cavity of the socket. The positioning hole is opened through the rear end of the rod in a horizontal direction. The positioning rod is inserted and removed horizontally into the cavity of the rod.

[0009] The above technical solution also includes: a fixing block and a spring, wherein the fixing block is fixedly installed on the rear side wall of the first connecting seat, and the positioning rod slides through the side wall of the fixing block in the horizontal direction; the spring is sleeved on the positioning rod, and the two ends of the spring are respectively fixedly connected to the left end of the positioning rod and the right end of the fixing block.

[0010] The above technical solution also includes: a first connecting plate and a first handle, wherein the first connecting plate is fixedly installed on the left end of the two positioning rods and is arranged in a vertical direction; the first handle is fixedly installed on the left side wall of the first connecting plate.

[0011] The above technical solution also includes: a second connecting plate and a second handle, wherein the second connecting plate is fixedly installed on the front sidewall of the two second connecting seats and the second connecting plate is arranged in a vertical direction; the second handle is fixedly installed on the front sidewall of the second connecting plate.

[0012] In the above technical solution, rolling components are respectively installed at the bottom ends of the two semi-protective structures. Each set of rolling components includes: a base, a rotating shaft, a seat body, and a caster wheel. Two bases are provided, and the two bases are installed on the side walls of the semi-protective structures in a left-right correspondence. The rotating shaft is rotatably disposed between the two bases. The seat body is fixedly installed on the rotating shaft. The caster wheel is disposed at the bottom end of the seat body.

[0013] In the above technical solution, a locking rod is provided through the two bases, and the locking rod is pluggable through the top of the base in a horizontal direction.

[0014] In the above technical solution, the locking rod and the rotating shaft are arranged vertically in a corresponding manner.

[0015] In the above technical solution, each of the semi-protective structures is configured as a hollow semi-cylindrical structure, and two of the semi-protective structures form a cylindrical protective structure with a closed outer wall.

[0016] In the above technical solution, each of the semi-protective structures is configured as a hollow cuboid structure, and two of the semi-protective structures form a cuboid protective structure with an outer closed outer wall.

[0017] The borehole opening protection device of this utility model has the following advantages compared with the prior art:

[0018] I. In view of the problem that existing integrated protective devices are prone to friction with the pile hole when dragging the main body along the ground when the middle through hole needs to be aligned with the top of the pile hole, this utility model adopts a split design of two half protective structures. With this design, there is no need to drag the main body of the protective device. The two sets of half protective structures can be moved to the corresponding positions and assembled to form an integrated protective structure for the pile hole, effectively avoiding the pile hole friction defect caused by dragging.

[0019] Second, in view of the shortcomings of existing integrated protective devices that require additional lifting equipment to align the central through hole with the top of the pile hole through hoisting method, this utility model adopts a split design of two half protective structures, and sets universal wheels at the bottom of each half protective structure. Thus, without relying on additional lifting equipment, the protective device can be placed in the pile hole position quickly, effectively and accurately, which significantly improves the convenience and efficiency of operation.

[0020] Third, in this utility model, the two sets of semi-protective structures can achieve rapid positioning and locking by means of the coordinated action of the first connecting seat, the insertion hole, the second connecting seat, the insertion rod and other components, and then quickly assemble into an integrated structure. At the same time, the structure can simultaneously complete the limiting or limiting disengagement operation of the two points at the docking point, which greatly improves the assembly efficiency of the two sets of semi-protective structures.

[0021] IV. In this utility model, the caster wheel adopts an upward rotating and retractable design. During the initial assembly of the two sets of semi-protective structures, the caster wheel can be in contact with the ground so that the two sets of semi-protective structures can be assembled by rotating and fastening. After assembly, the caster wheel can be retracted upward so that the bottom edge of the semi-protective structure can be completely grounded, further enhancing the overall stability of the protective device at the pile hole. That is, the position of the caster wheel can be adjusted as needed, making the operation convenient and efficient.

[0022] V. This utility model is provided with two sets of semi-circular ports for lowering the pile column. The two sets of semi-circular ports form a hole, which allows the pile column to be lowered directly through the semi-circular ports without disassembling the semi-protective structure and the semi-circular ports. It can continuously play a protective role for the pile column and realize the multi-functional use of one device.

[0023] In summary, this utility model adopts two separate semi-protective structures, which, after assembly, form an integrated protection structure for the pile hole, avoiding the problem of pile hole friction caused by dragging; the universal wheels at the bottom of the semi-protective structure allow for convenient and precise placement of the protective device without additional lifting equipment, improving operational efficiency; the two sets of semi-protective structures can simultaneously complete the limiting or disengaging operation of the two points at the docking point, greatly improving assembly efficiency; the universal wheels can be rotated and stored, enhancing the stability and ease of operation of the device. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the semi-arc port of Embodiment 1 of this utility model;

[0025] Figure 2 This is a schematic diagram of the structure of the second connecting plate in Embodiment 1 of this utility model;

[0026] Figure 3 This is a top view of the positioning rod in Embodiment 1 of this utility model;

[0027] Figure 4 This is a schematic diagram of the structure of Embodiment 1 of this utility model when the two semi-protective structures are in the open state;

[0028] Figure 5 for Figure 1 Enlarged view of point A;

[0029] Figure 6 This is a schematic diagram of the semi-protective structure in Embodiment 2 of this utility model;

[0030] Figures 1 to 6In the middle, 1. Semi-protective structure, 2. Semi-arc port, 3. Fixed seat, 4. Rotating seat, 5. First connecting seat, 6. Insertion hole, 7. Second connecting seat, 8. Insertion rod, 9. Positioning hole, 10. Fixed block, 11. Positioning rod, 12. Spring, 13. First connecting plate, 14. First handle, 15. Second connecting plate, 16. Second handle, 17. Base, 18. Rotating shaft, 19. Seat body, 20. Universal wheel, 21. Locking rod. Detailed Implementation

[0031] The following are specific implementation cases and appendices. Figures 1 to 6 The present invention will be further described below, but the present invention is not limited to these embodiments.

[0032] Example 1

[0033] See Figures 1 to 5 As shown, a borehole protection device for bored piles includes: a semi-protective structure 1, a semi-arc port 2, a fixed seat 3, a rotating seat 4, a first connecting seat 5, and a second connecting seat 7. Two sets of semi-protective structures 1 are provided, and the two sets are designed separately, with the two sets of semi-protective structures 1 arranged correspondingly front to back. Each semi-protective structure 1 is a hollow semi-cylindrical structure, and the two semi-protective structures 1 form a cylindrical protective structure with a closed outer wall. The semi-arc port 2 is located in the middle of the semi-protective structure 1. This utility model provides two sets of semi-arc ports 2 for lowering the pile, and the two sets of semi-arc ports 2 form a hole, allowing the pile to be lowered directly through the semi-arc ports 2 without disassembling the semi-protective structure 1 and the semi-arc ports 2, thus continuously protecting the pile. The device is designed to perform multiple functions. Two fixed bases 3 are provided, each fixedly installed on the upper and lower right sides of the rear semi-protective structure 1. Rotary bases 4 are fixedly installed on the upper and lower right sides of the front semi-protective structure 1, and are rotatably connected to the fixed bases 3. Two first connecting bases 5 are provided, each fixedly installed on the upper and lower left sides of the rear semi-protective structure 1. Second connecting bases 7 are fixedly installed on the upper and lower left sides of the front semi-protective structure 1. An assembly assembly is provided between the first connecting bases 5 and the second connecting bases 7, allowing the first connecting bases 5 and the second connecting bases 7 to be assembled, thus forming an integrated protective device from the two semi-protective structures 1.

[0034] This utility model employs two semi-protective structures 1 with a split design. Thanks to this design, there is no need to drag the main body of the protective device; simply move the two semi-protective structures 1 to their respective positions and assemble them to form an integrated protective structure for the pile hole, effectively avoiding pile hole friction problems caused by dragging. The two semi-protective structures 1, with their split design, are each equipped with casters 20 at their bottom. This structure allows for quick, effective, and precise placement of the protective device at the pile hole without the need for additional lifting equipment, significantly enhancing the convenience and efficiency of operation.

[0035] Specifically, the assembly components include: a socket 6, a rod 8, a positioning hole 9, and a positioning rod 11. The socket 6 is opened through the first connecting seat 5 from front to back. The rod 8 is fixed and vertically installed on the rear side wall of the second connecting seat 7, and the rod 8 is embedded in the cavity of the socket 6. The positioning hole 9 is opened through the rear end of the rod 8 in a horizontal direction. The positioning rod 11 is inserted and removed into the cavity of the rod 8 in a horizontal direction.

[0036] In this invention, the two sets of semi-protective structures 1, through the coordinated action of components such as the first connecting seat 5, the insertion hole 6, the second connecting seat 7, and the insertion rod 8, can achieve rapid positioning and locking and quickly assemble into an integrated structure. This structure has the function of simultaneously completing the limiting or disengaging operation of two points at the docking point, which greatly improves the assembly efficiency of the two sets of semi-protective structures 1.

[0037] This solution also includes: a fixing block 10 and a spring 12. The fixing block 10 is fixedly installed on the rear side wall of the first connecting seat 5, and the positioning rod 11 slides horizontally through the side wall of the fixing block 10. The spring 12 is sleeved on the positioning rod 11, and both ends of the spring 12 are fixedly connected to the left end of the positioning rod 11 and the right end of the fixing block 10, respectively. With the spring 12, the positioning rod 11 can be automatically inserted into the positioning hole 9 of the insertion rod 8 under the action of removing external force, thereby locking and positioning the insertion rod 8.

[0038] In addition, this solution also includes: a first connecting plate 13 and a first handle 14. The first connecting plate 13 is fixedly installed on the left end of the two positioning rods 11 and is arranged vertically. The first handle 14 is fixedly installed on the left side wall of the first connecting plate 13. By driving the first handle 14 and the first connecting plate 13, the upper and lower sets of positioning rods 11 can be driven to simultaneously disengage from the corresponding positioning holes 9, realizing the synchronous disengagement or limiting of the two points. That is, the synchronous state adjustment of the two sets of points is realized, which saves more positioning steps. Similarly, this solution also includes: a second connecting plate 15 and a second handle 16. The second connecting plate 15 is fixedly installed on the front side wall of the two second connecting seats 7 and is arranged vertically. The second handle 16 is fixedly installed on the front side wall of the second connecting plate 15. By driving the second handle 16 and the second connecting plate 15, the two sets of second connecting seats 7 can be driven to move closer to or further away from the first connecting seat 5, so as to realize the quick assembly or disassembly of the two second connecting seats 7 and the two first connecting seats 5, that is, to realize the synchronous adjustment of the two sets of second connecting seats 7.

[0039] Two semi-protective structures 1 are each equipped with a rolling assembly at their bottom ends. Each rolling assembly includes a base 17, a pivot 18, a seat 19, and a caster wheel 20. Two bases 17 are provided, and the two bases 17 are installed on the side walls of the semi-protective structure 1, corresponding to each other. The pivot 18 is rotatably mounted between the two bases 17 via a pin. The seat 19 is fixedly mounted on the pivot 18. The caster wheel 20 is located at the bottom of the seat 19. Specifically, the caster wheel 20 is a commercially available, universal model with a self-locking function, capable of locking or unlocking as needed. This is existing technology, and any commercially available model meeting the usage requirements can be used; therefore, no further details or limitations are provided. A locking rod 21 is inserted through the two bases 17, and the locking rod 21 is horizontally detachable and extends through the top of the seat 19.

[0040] After the device is assembled, the caster wheel 20 needs to be adjusted to lift off the ground to ensure that the bottom edge of the semi-protective structure 1 is in complete contact with the ground. In specific operation, the locking rod 21 is pulled out from the outer wall of the seat 19, at which point the limiting effect of the seat 19 in the base 17 is released. Then, the caster wheel 20 and the seat 19 are rotated outward and upward, causing the rotating shaft 18 to rotate relative to the base 17. This allows the caster wheel 20 to be lifted off the ground and the bottom edge of the semi-protective structure 1 to be completely in contact with the ground, providing a reliable guarantee for the overall protective stability of the semi-protective structure 1 at the pile hole.

[0041] In this invention, the caster wheel 20 adopts a structure design that allows it to rotate upwards and be stored. During the initial assembly stage of the two sets of semi-protective structures 1, the caster wheel 20 can be flush with the ground, facilitating the assembly of the two sets of semi-protective structures 1 through rotational fastening. After assembly, the caster wheel 20 can be stored upwards, allowing the bottom edge of the semi-protective structure 1 to fully contact the ground, thereby enhancing the overall stability of the protective device at the pile hole. The position of the caster wheel 20 can be adjusted according to actual needs, making operation convenient and efficient.

[0042] The locking rod 21 and the rotating shaft 18 are arranged vertically to ensure that after the seat body 19 rotates around the rotating shaft 18, the locking rod 21 can smoothly pass through the top of the locking rod 21 to position the locking rod 21.

[0043] The working principle of the borehole protection device for bored piles in this embodiment is as follows:

[0044] When using this device to protect the pile hole, first ensure that the semi-protective structure 1 at the rear of the device is located at the rear of the pile hole, and ensure that the semi-circular port 2 at the rear semi-protective structure 1 is on the same vertical line as the center of the pile hole; pull the first handle 14 and the first connecting plate 13 to the left, causing the positioning rods 11 at the upper and lower positions to move to the left, at which time the spring 12 is forced to stretch and produce elastic deformation; then rotate the front semi-protective structure 1 towards the rear semi-protective structure 1, at which time the rotating seat 4 rotates relative to the fixed seat 3, and the universal wheel 20 rolls along the ground, the second connecting... The insertion rod 8 on the seat 7 passes through the corresponding insertion hole 6 to the rear, achieving complete engagement of the front and rear semi-protective structures 1; the external pulling force on the first handle 14 is removed, and under the action of the spring 12, the positioning rod 11 is pushed into the inner cavity of the positioning hole 9 at the corresponding insertion rod 8. At this time, the positioning rod 11 locks the position of the insertion rod 8 inserted into the inner cavity of the insertion hole 6; thus, the front semi-protective structure 1 is locked after the rear semi-protective structure 1. In this state, the two sets of semi-protective structures 1 form a stable integrated protective device, protecting the holes at the circular holes formed by the two sets of semi-arc ports 2;

[0045] After the device is assembled, adjust the caster wheel 20 to lift it off the ground to ensure that the bottom edge of the semi-protective structure 1 is in complete contact with the ground. Pull the locking rod 21 out of the outer wall of the seat 19. At this time, the seat 19 loses its limiting function in the base 17. Rotate the caster wheel 20 and the seat 19 outward and upward to make the rotating shaft 18 rotate relative to the base 17. This will enable the caster wheel 20 to rotate and lift off the ground, so that the bottom edge of the semi-protective structure 1 is completely in contact with the ground, thus ensuring the overall stability of the semi-protective structure 1 at the pile hole.

[0046] This utility model adopts two split semi-protective structures 1, which, after assembly, form an integrated protection structure for the pile hole, avoiding the problem of pile hole friction caused by dragging; the universal wheels 20 at the bottom of the semi-protective structure 1 can conveniently and accurately place the protective device without additional lifting tools, improving operational efficiency; the two sets of semi-protective structures 1 can simultaneously complete the limiting or limiting disengagement operation of the two points at the docking point, greatly improving assembly efficiency; the universal wheels 20 can be rotated and stored, enhancing the stability and ease of operation of the device.

[0047] Example 2

[0048] See Figure 6 As shown, the difference between this embodiment and embodiment 1 is that each semi-protective structure 1 is set as a hollow cuboid structure, and two semi-protective structures 1 form a cuboid protective structure with closed outer walls; that is, after the two sets of semi-protective structures 1 are spliced ​​together, they can form a rectangular protective device to adapt to the protection needs of different protective environments.

[0049] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0050] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0051] In this disclosure, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of the embodiments of this disclosure and their implementations, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to require them to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this disclosure according to the specific circumstances.

[0052] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0053] Unless otherwise stated, the term "multiple" means two or more.

[0054] In this embodiment of the disclosure, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.

[0055] The term "and / or" describes the relationship between objects, indicating that there can be three relationships. For example, A and / or B means: A or B, or A and B.

[0056] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A device for protecting the mouth of a bored pile, characterised in that: include: The semi-protective structure (1) is provided in two sets, and the two sets of the semi-protective structure (1) are designed separately, and the two sets of the semi-protective structure (1) are arranged in front and behind respectively; A semi-circular port (2) is provided in the middle of the semi-protective structure (1); Fixed base (3), two fixed bases (3) are provided, and the two fixed bases (3) are respectively fixedly installed on the upper and lower ends of the right side of the rear semi-protective structure (1); Rotary seat (4), the rotating seat (4) is fixedly installed on the upper and lower ends of the right side of the front semi-protective structure (1), and the rotating seat (4) is rotatably connected to the fixed seat (3); The first connecting seat (5) is provided in two, and the two first connecting seats (5) are respectively fixedly installed on the upper and lower ends of the left side of the semi-protective structure (1) on the rear side; The second connecting seat (7) is fixedly installed on the upper and lower left sides of the semi-protective structure (1) on the front side; An assembly assembly is provided between the first connecting seat (5) and the second connecting seat (7).

2. The borehole protection device for bored piles according to claim 1, characterized in that: The assembly components include: The socket (6) is formed through the first connector (5) from front to back; Insert rod (8), the insert rod (8) is fixed and vertically installed on the rear side wall of the second connecting seat (7), and the insert rod (8) is embedded in the inner cavity of the insertion hole (6); Positioning hole (9), the positioning hole (9) is opened horizontally through the rear end of the insertion rod (8); Positioning rod (11), which is pluggable and insertable in the cavity of the insert rod (8) in the horizontal direction.

3. The borehole protection device for bored piles according to claim 2, characterized in that: Also includes: A fixing block (10) is fixedly installed on the rear side wall of the first connecting seat (5), and the positioning rod (11) slides through the side wall of the fixing block (10) in the horizontal direction; Spring (12) is sleeved on the positioning rod (11), and the two ends of the spring (12) are fixedly connected to the left end of the positioning rod (11) and the right end of the fixing block (10), respectively.

4. The borehole opening protection device for bored piles according to claim 2, characterized in that: Also includes: The first connecting plate (13) is fixedly installed on the left end of the two positioning rods (11), and the first connecting plate (13) is arranged in the vertical direction; The first handle (14) is fixedly installed on the left side wall of the first connecting plate (13).

5. A borehole protection device for bored piles according to claim 1, characterized in that: Also includes: The second connecting plate (15) is fixedly installed on the front side wall of the two second connecting seats (7), and the second connecting plate (15) is arranged in the vertical direction; The second handle (16) is fixedly installed on the front side wall of the second connecting plate (15).

6. The borehole opening protection device of a bored pile according to claim 1, characterized in that: The bottom ends of the two semi-protective structures (1) are respectively equipped with rolling components, and each set of rolling components includes: Two bases (17) are provided, and the two bases (17) are installed on the side walls of the semi-protective structure (1) respectively. A rotating shaft (18) is rotatably disposed between the two bases (17); A base (19) is fixedly mounted on the rotating shaft (18); The caster wheel (20) is located at the bottom of the seat (19).

7. A borehole protection device for bored piles according to claim 6, characterized in that: A locking rod (21) is provided between the two bases (17), and the locking rod (21) is pluggable through the top of the base (19) in the horizontal direction.

8. A borehole protection device for bored piles according to claim 7, characterized in that: The locking rod (21) and the rotating shaft (18) are arranged vertically and vertically respectively.

9. A borehole protection device for bored piles according to claim 1, characterized in that: Each of the semi-protective structures (1) is configured as a hollow semi-cylindrical structure, and two of the semi-protective structures (1) form a cylindrical protective structure with an outer wall closed.

10. A borehole protection device for bored piles according to claim 1, characterized in that: Each of the semi-protective structures (1) is configured as a hollow cuboid structure, and two of the semi-protective structures (1) form a cuboid protective structure with an outer wall closed.

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