Protective tools for cast-in-place pile holes

Abstract

This utility model discloses a protective tool for cast-in-place pile holes, relating to the field of construction tooling technology. The protective tool includes a steel casing, a protective steel mesh, and a warning cylinder. The steel casing is placed inside the cast-in-place pile hole, with a clamping area formed on its outer periphery that abuts against the inner wall of the hole. The protective steel mesh covers the top of the steel casing, and multiple connectors are spaced apart at the bottom of the mesh, allowing for detachable connection to the outer periphery of the casing. The top of the mesh has a support area with a limiting component, including a limiting plate and multiple limiting ribs, the limiting plate being connected to the support area. A limiting cavity is formed inside the warning cylinder, with an opening at its bottom. The warning cylinder can cover the limiting component, allowing the limiting ribs to extend into the limiting cavity from the opening and abut against the inner wall. This utility model provides a protective tool for cast-in-place pile holes with improved stability and reliability, ease of assembly and disassembly, and high recognizability.

Description

Technical Field

[0001] This utility model relates to the field of construction tooling technology, and in particular to a protective tool for grouting pile holes. Background Technology

[0002] In the construction industry, as building heights increase, the depth and diameter of pile foundations also increase, leading to greater construction difficulty and safety risks. Inadequate protection of cast-in-place pile holes can result in falls by construction workers, endangering their lives and severely impacting project progress and quality.

[0003] Currently, protective tools for cast-in-place pile holes are usually made of simple steel mesh or partitions. This can lead to lapses in attention during construction, making it difficult to identify the problem and potentially causing irreversible accidents. Furthermore, the steel mesh or partitions are relatively loose, prone to displacement, and have poor reliability. Utility Model Content

[0004] The main purpose of this utility model is to propose a protective tool for cast-in-place pile holes, which aims to solve the technical problem of poor reliability of current protective tools for cast-in-place pile holes.

[0005] To achieve the above objectives, this utility model proposes a protective tool for cast-in-place pile holes, comprising:

[0006] A steel casing is used to be placed inside the grouting pile hole. The steel casing is hollow and has two openings at both ends along its axial direction that communicate with its inner cavity. The outer periphery of the steel casing forms a closed annular abutment area along its circumference, and the abutment area abuts against the inner wall of the grouting pile hole.

[0007] A protective steel mesh is provided, covering and supporting the top of the steel casing, and concealing the opening at the top of the steel casing. Multiple downwardly extending connectors are spaced at the bottom of the protective steel mesh along its circumference, and these connectors are detachably connected to the outer periphery of the steel casing. The top of the protective steel mesh has a support area, which is equipped with a limiting component. The limiting component includes a limiting plate and multiple upwardly extending limiting ribs connected to the limiting plate. The limiting plate is connected to the support area, and the multiple limiting ribs are spaced at intervals along the circumference of the limiting plate.

[0008] A warning cylinder has a limiting cavity inside. The bottom of the warning cylinder has an opening that communicates with the limiting cavity. The warning cylinder can cover the limiting component, and each of the limiting ribs can extend into the limiting cavity from the opening and abut against the inner wall of the limiting cavity.

[0009] In one embodiment, the steel casing includes an inner section and an outer section that are interconnected. The inner section is embedded in the grouting pile hole, and the outer periphery of the inner section forms the abutment area. The outer section is connected to the top of the inner section and located outside the grouting pile hole. The protective steel mesh covers and supports the top of the outer section. The inner section and the outer section each form two openings at opposite ends. The connector can be detachably connected to the outer periphery of the outer section.

[0010] In one embodiment, the outer diameter of the protective steel mesh is larger than the outer diameter of the top of the steel casing, and a plurality of the connectors are evenly spaced along the circumferential intervals of the bottom of the protective steel mesh.

[0011] In one embodiment, some of the connecting members are connecting plates, and the other part of the connecting members are snap fasteners; wherein, the connecting members and the outer display section have a gap along the radial direction of the steel casing, the connecting plate is provided with a first screw hole, the outer display section is provided with a second screw hole, and each of the snap fasteners engages with the outer display section so that the first screw hole and the second screw hole correspond, so that the connecting plate and the outer display section are fastened by bolts passing through the first screw hole and the second screw hole.

[0012] In one embodiment, the external segment is provided with a plurality of flanges spaced apart along its circumference. The number of flanges is the same as the number of buckles and they are arranged in a one-to-one correspondence. Each flange extends along the circumference. The bottom of the buckle is provided with a latch extending toward the steel sleeve. The latch can abut against the bottom of the corresponding flange.

[0013] In one embodiment, a downwardly protruding limiting block is provided at the bottom of the flange, and one side of the latch abuts against the limiting block.

[0014] In one embodiment, each of the flanges includes an interconnected guide segment and a limiting segment along its extension direction. The bottom of the guide segment is formed with a guide ramp, which is inclined downward from one end of the guide segment away from the limiting segment to the end connected to the limiting segment. The limiting block is provided at the bottom of the limiting segment and at a position away from the guide segment.

[0015] In one embodiment, each of the limiting ribs is an elastic limiting rib, and the outer side of each elastic limiting rib abuts against the inner wall of the limiting cavity under its elastic force, and the plurality of elastic limiting ribs are evenly distributed at intervals along the circumference of the limiting cavity.

[0016] In one embodiment, the limiting cavity is a conical limiting cavity, and the inner diameter of the conical limiting cavity gradually increases from top to bottom.

[0017] In one embodiment, the warning cylinder is a conical warning cylinder, with a support ring formed at the bottom outer edge of the conical warning cylinder, the support ring being supported by the protective steel mesh, and a reflective film provided on the outer surface of the conical warning cylinder.

[0018] This utility model discloses a protective tool for cast-in-place pile holes, employing a steel casing and a protective steel mesh. The steel casing can be inserted into the cast-in-place pile hole, and a closed annular abutment area is provided on the outer periphery of the hole. This abutment area tightly conforms to the inner wall of the pile hole, providing good support and positioning to prevent the pile hole from collapsing. A protective steel mesh is placed on top of the steel casing, effectively preventing construction personnel, tools, or other objects from accidentally falling into the pile hole, ensuring construction safety. Furthermore, multiple downward-extending connectors at the bottom of the protective steel mesh ensure its secure placement on top of the steel casing, enhancing the overall structural stability and reliability. This also facilitates disassembly and assembly, improving on-site installation efficiency. In addition, by setting a limiting component on the top of the protective steel mesh, the limiting component includes a limiting plate and a limiting rib. The limiting plate has a large bottom area, which is conducive to the connection with the protective steel mesh and also facilitates the stability of the limiting rib. The warning cylinder cover is set outside the limiting component, so that the limiting rib extends into the limiting cavity and abuts against the inner wall, making the warning cylinder firmly fixed and not easily blown away by the wind or knocked over by human. At the same time, the warning cylinder also plays a conspicuous visual warning role with high recognition, which can effectively remind the workers to pay attention to the position of the grouting pile hole and avoid approaching or accidentally stepping on it, thus improving reliability. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0020] Figure 1 A schematic diagram of the structure of a protective tool according to an embodiment of this utility model is provided;

[0021] Figure 2 A front view schematic diagram of a protective tool according to an embodiment of the present invention;

[0022] Figure 3 A side view schematic diagram of a protective tool according to an embodiment of the present invention;

[0023] Figure 4 A cross-sectional schematic diagram of a protective tool according to an embodiment of the present invention.

[0024] Explanation of icon numbers:

[0025] 100. Protective equipment; 1. Steel casing; 11. Inner cavity; 12. Opening; 13. Embedded section; 131. Tightening area; 14. External visible section; 141. Flange; 1411. Guide section; 1412. Limiting section; 1413. Guide ramp; 1414. Limiting block; 2. Protective steel mesh; 21. Connector; 21a. Connecting plate; 21b. Buckle; 22. Limiting assembly; 221. Limiting plate; 222. Limiting rib; 3. Warning cylinder; 31. Limiting cavity; 32. Support ring.

[0026] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0028] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0029] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0030] This utility model proposes a protective tool 100 for grouting pile holes.

[0031] Please see Figures 1-4In one embodiment of this utility model, the protective tool 100 for the grouting pile hole includes a steel casing 1, a protective steel mesh 2, and a warning cylinder 3. The steel casing 1 is placed inside the grouting pile hole. The steel casing 1 is hollow, and two openings 12 communicating with its inner cavity 11 are opened at both ends along its axial direction. An annular closed abutment area 131 is formed on the outer periphery of the steel casing 1 along its circumference, and the abutment area 131 abuts against the inner wall of the grouting pile hole. The protective steel mesh 2 covers and supports the top of the steel casing 1, and the protective steel mesh 2 covers the openings 12 at the top of the steel casing 1. The bottom of the protective steel mesh 2 is provided with multiple downwardly extending connections at intervals along its circumference. Component 21, the connector 21 can be detachably connected to the outer periphery of the steel casing 1; the top of the protective steel mesh 2 has a support area, the support area is provided with a limiting component 22, the limiting component 22 includes a limiting plate 221 and a plurality of limiting ribs 222 connected to the limiting plate 221 and extending upward, the limiting plate 221 is connected to the support area, and the plurality of limiting ribs 222 are spaced apart along the circumference of the limiting plate 221; a limiting cavity 31 is formed inside the warning cylinder 3, the bottom of the warning cylinder 3 has an opening communicating with the limiting cavity 31, the warning cylinder 3 can be covered outside the limiting component 22, and each limiting rib 222 can extend into the limiting cavity 31 from the opening and abut against the inner wall of the limiting cavity 31.

[0032] The protective tool 100 for cast-in-place pile holes of this utility model adopts a steel casing 1 and a protective steel mesh 2. The steel casing 1 can be inserted into the cast-in-place pile hole, and the outer periphery of the hole has a closed annular abutment area 131. This abutment area can tightly fit against the inner wall of the pile hole, providing good support and positioning to prevent the pile hole from collapsing. A protective steel mesh 2 is placed on top of the steel casing 1, effectively preventing construction personnel, tools, or other objects from accidentally falling into the pile hole, ensuring construction safety. Furthermore, by setting multiple downward-extending connectors 21 at the bottom of the protective steel mesh 2, the protective steel mesh 2 is securely placed on top of the steel casing 1, enhancing the overall structural stability and reliability, while also facilitating disassembly and assembly, improving on-site installation efficiency. In addition, by setting a limiting component 22 on the top of the protective steel mesh 2, the limiting component 22 includes a limiting plate 221 and a limiting rib 222. The limiting plate 221 has a large bottom area, which is conducive to the connection with the protective steel mesh 2 and also facilitates the stability of the limiting rib 222. The warning cylinder 3 is placed on the outside of the limiting component 22, so that the limiting rib 222 extends into the limiting cavity 31 and abuts against the inner wall, making the warning cylinder 3 firmly fixed and not easily blown away by the wind or knocked over by people. At the same time, the warning cylinder 3 can also play a conspicuous visual warning role with high recognition, which can effectively remind the workers to pay attention to the position of the grouting pile hole and avoid approaching or accidentally stepping on it, thus improving reliability.

[0033] In one embodiment, the steel casing 1 includes an inner section 13 and an outer section 14 that are interconnected. The inner section 13 is embedded in the grouting pile hole, and a pressing area 131 is formed on the outer periphery of the inner section 13. The outer section 14 is connected to the top of the inner section 13 and is located outside the grouting pile hole. A protective steel mesh 2 is covered and supported on the top of the outer section 14. Two openings 12 are formed at opposite ends of the inner section 13 and the outer section 14, respectively. The connector 21 can be detachably connected to the outer periphery of the outer section 14.

[0034] Understandably, the steel casing 1 includes an inner section 13 and an outer section 14 that are interconnected. The inner section 13 is embedded in the grouting pile hole, which can effectively prevent the grouting pile hole from collapsing. The outer section 14 protrudes outside the grouting pile hole, which is conducive to the rapid installation and disassembly of the connector 21 and the outer periphery of the outer section 14, improving the efficiency of on-site construction. Its protrusion from the grouting pile hole is equivalent to protruding from the ground at a certain height, which is more conducive to identification and improves on-site safety.

[0035] It should be noted that the length of the embedded section 13 can be adjusted according to the grouting pile hole, while the exposed section 14 can be adjusted according to the height requirements on site, ensuring that at least part of the steel casing 1 is exposed outside the grouting pile hole; and the diameters of the embedded section 13 and the exposed section 14 are equal.

[0036] In one embodiment, the outer diameter of the protective steel mesh 2 is larger than the outer diameter of the top of the steel casing 1, and a plurality of connectors 21 are evenly spaced along the circumferential intervals of the bottom of the protective steel mesh 2.

[0037] Understandably, the outer diameter of the protective steel mesh 2 is larger than the outer diameter of the top of the steel casing 1, allowing the protective steel mesh 2 to cover a larger area. This not only protects the space above the pile hole but also prevents the protective steel mesh 2 from falling into the steel casing 1 from the opening 12 during installation. The multiple connectors 21 are evenly spaced, making the connection between the protective steel mesh 2 and the steel casing 1 more stable and improving its stability.

[0038] In one embodiment, part of the connector 21 is a connecting plate 21a, and the other part of the connector 21 is a buckle 21b. The connector 21 and the outer display section 14 have a gap along the radial direction of the steel casing 1. The connecting plate 21a is provided with a first screw hole, and the outer display section 14 is provided with a second screw hole. Each buckle 21b is engaged with the outer display section 14 so that the first screw hole and the second screw hole correspond to each other, so that the connecting plate 21a and the outer display section 14 are fastened by bolts passing through the first screw hole and the second screw hole.

[0039] The connector 21 consists of a connecting plate 21a and a clip 21b. The clip 21b engages with the outer section 14 for initial positioning, ensuring the first screw hole on the connecting plate 21a aligns accurately with the second screw hole on the outer section 14. This avoids the need for repeated adjustments required in traditional single-bolt connections, improving installation efficiency and accuracy. Furthermore, the connecting plate 21a is secured to the outer section 14 with bolts, further enhancing the connection stability between the protective steel mesh 2 and the steel casing 1.

[0040] For example, when four connectors 21 are provided, it can be one connecting plate 21a and three clips 21b, or two connecting plates 21a and two clips 21b, or three connecting plates 21a and one clip 21b. The specific number of connectors 21 depends on the actual needs and will not be elaborated here. Preferably, in this embodiment, one connecting plate 21a and three clips 21b are used.

[0041] In one specific embodiment, the number of connecting plates 21a and buckles 21b is the same and there are multiple of each. The connecting plates 21a and buckles 21b are alternately arranged along the circumference of the protective steel mesh 2 and are evenly spaced.

[0042] In one embodiment, a plurality of flanges 141 are provided on the external display section 14 at intervals along its circumference. The number of flanges 141 is the same as that of the buckles 21b and they are provided in a one-to-one correspondence. Each flange 141 extends circumferentially. The bottom of the buckle 21b is provided with a latch extending toward the steel casing 1. The latch can abut against the bottom of the corresponding flange 141.

[0043] Understandably, the latch and the bottom of the flange 141 abut against each other, allowing the buckle 21b to quickly and accurately engage with the flange 141 on the exposed section 14, forming a preliminary fixation, which greatly improves the installation efficiency and effectively prevents the buckle 21b from slipping or shifting when subjected to vertical or lateral forces, thus improving the overall connection reliability of the protective steel mesh 2.

[0044] In another embodiment, a slot may be provided on the external display section 14, the number of slots and the number of buckles 21b are the same and they are set one-to-one, and the latch can extend into the slot and engage with the slot.

[0045] In one embodiment, a downwardly protruding limiting block 1414 is provided at the bottom of the flange 141, and one side of the latch abuts against the limiting block 1414.

[0046] Understandably, when assembling the protective steel mesh 2, the tab slides along the bottom of the flange 141 and finally abuts against the limiting block 1414 by rotating the protective steel mesh 2. The limiting block 1414 is used to limit the movement, ensuring that the protective steel mesh 2 can be adjusted to the predetermined position and angle, which facilitates the quick alignment of the first screw hole and the second screw hole, and improves the position correction efficiency and installation efficiency of the protective steel mesh 2.

[0047] In one embodiment, each flange 141 includes a guide section 1411 and a limiting section 1412 connected to each other along its extension direction. A guide ramp 1413 is formed at the bottom of the guide section 1411. The guide ramp 1413 is inclined downward from one end of the guide section 1411 away from the limiting section 1412 to the end connected to the limiting section 1412. A limiting block 1414 is provided at the bottom of the limiting section 1412 and at a position away from the guide section 1411.

[0048] Understandably, when assembling the protective steel mesh 2, by rotating the protective steel mesh 2 relative to the steel casing 1, the latch can slide along the bottom of the guide section 1411 and eventually abut against the bottom of the limiting section 1412; the guide ramp 1413 allows the latch to slide smoothly into the bottom of the guide section 1411 during the circumferential movement, playing a guiding role and preventing the latch from getting stuck on the side of the flange 141, thus preventing the first screw hole and the second screw hole from being aligned.

[0049] In one specific embodiment, the latch 21b has a certain elasticity, and during the installation process, the latch may be directly inserted into the bottom of the limiting section 1412 depending on the operation.

[0050] In one embodiment, each limiting rib 222 is an elastic limiting rib 222, and the outer side of each elastic limiting rib 222 abuts against the inner wall of the limiting cavity 31 under its elastic force, and the multiple elastic limiting ribs 222 are evenly distributed along the circumferential interval of the limiting cavity 31.

[0051] Understandably, when the warning cylinder 3 is fitted onto the outside of the limiting component 22, the inner wall of the warning cylinder 3 abuts against the elastic limiting rib 22, causing the elastic limiting rib 22 to undergo elastic deformation. When the warning cylinder 3 is supported on the protective steel mesh 2, the elastic limiting rib 222, under its elastic force, causes its outer side to abut against the inner wall of the limiting cavity 31, thereby stabilizing and fixing the warning cylinder 3. Furthermore, the multiple elastic limiting ribs 222 are evenly distributed circumferentially, making the force on the warning cylinder 3 more balanced, improving the stability of the warning cylinder 3, and providing a better anti-tipping effect.

[0052] Furthermore, the limiting cavity 31 is a conical limiting cavity 31, and the inner diameter of the conical limiting cavity 31 gradually increases from top to bottom. By setting the limiting cavity 31 to a conical shape, during the installation of the limiting cavity 31, the limiting cavity gradually compresses the elastic limiting rib 22 and causes it to undergo elastic deformation, making the installation process more convenient.

[0053] In one embodiment, the warning cylinder 3 is a conical warning cylinder 3, with a support ring 32 formed on the bottom outer edge of the conical warning cylinder 3. The support ring 32 is supported on the protective steel mesh 2, and a reflective film is provided on the outer surface of the conical warning cylinder 3.

[0054] Understandably, the conical warning cylinder 3 has a low center of gravity and a large base area, making it less likely to tip over or overturn due to external forces; the support ring 32 allows the warning cylinder 3 to be placed stably on the protective steel mesh 2, playing an auxiliary positioning and support role; in addition, the reflective film has good reflective properties and can still be clearly seen in low light or nighttime construction environments, making the warning cylinder 3 highly recognizable and more eye-catching from all angles, thus effectively reminding workers to stay away from the pile hole area and significantly improving the safety warning effect at the construction site.

[0055] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A protection tool for a bored pile hole, characterized by, include: A steel casing is used to be placed inside the grouting pile hole. The steel casing is hollow and has two openings at both ends along its axial direction that communicate with its inner cavity. The outer periphery of the steel casing forms a closed annular abutment area along its circumference, and the abutment area abuts against the inner wall of the grouting pile hole. A protective steel mesh is provided, covering and supporting the top of the steel casing, and concealing the opening at the top of the steel casing. Multiple downwardly extending connectors are spaced at the bottom of the protective steel mesh along its circumference, and these connectors are detachably connected to the outer periphery of the steel casing. The top of the protective steel mesh has a support area, which is equipped with a limiting component. The limiting component includes a limiting plate and multiple upwardly extending limiting ribs connected to the limiting plate. The limiting plate is connected to the support area, and the multiple limiting ribs are spaced at intervals along the circumference of the limiting plate. A warning cylinder has a limiting cavity inside. The bottom of the warning cylinder has an opening that communicates with the limiting cavity. The warning cylinder can cover the limiting component, and each of the limiting ribs can extend into the limiting cavity from the opening and abut against the inner wall of the limiting cavity.

2. A tool for protecting a bored pile hole as claimed in claim 1, wherein The steel casing includes an inner section and an outer section that are interconnected. The inner section is embedded in the grouting pile hole, and the outer periphery of the inner section forms the abutment area. The outer section is connected to the top of the inner section and is located outside the grouting pile hole. The protective steel mesh covers and supports the top of the outer section. The inner section and the outer section each form two openings at opposite ends. The connector can be detachably connected to the outer periphery of the outer section.

3. A tool for protecting a bored pile hole as claimed in claim 2, wherein The outer diameter of the protective steel mesh is larger than the outer diameter of the top of the steel casing, and the plurality of connectors are evenly spaced along the circumferential intervals of the bottom of the protective steel mesh.

4. The protective tool for cast-in-place pile holes as described in claim 3, characterized in that, Some of the connecting components are connecting plates, and others are snap fasteners; wherein, the connecting components and the outer display section have a gap along the radial direction of the steel casing, the connecting plate is provided with a first screw hole, the outer display section is provided with a second screw hole, and each of the snap fasteners engages with the outer display section so that the first screw hole and the second screw hole correspond, so that the connecting plate and the outer display section are fastened by bolts passing through the first screw hole and the second screw hole.

5. A tool for protecting a bored pile hole as claimed in claim 4, wherein The external section has multiple flanges spaced circumferentially, and the number of flanges is the same as that of the buckles and they are arranged in a one-to-one correspondence. Each flange extends circumferentially, and the bottom of the buckle is provided with a latch extending toward the steel casing. The latch can abut against the bottom of the corresponding flange.

6. A tool for protecting a bored pile hole as claimed in claim 5, wherein The bottom of the flange is provided with a downwardly protruding limiting block, and one side of the latch can abut against the limiting block.

7. The protective tool for cast-in-place pile holes as described in claim 6, characterized in that, Each of the flanges includes a guide section and a limiting section connected to each other along its extension direction. A guide ramp is formed at the bottom of the guide section. The guide ramp is inclined downward from the end of the guide section away from the limiting section to the end connected to the limiting section. A limiting block is provided at the bottom of the limiting section and at a position away from the guide section.

8. A tool for protecting a bored pile hole according to any one of claims 1 to 7, wherein Each of the limiting ribs is an elastic limiting rib, and the outer side of each elastic limiting rib abuts against the inner wall of the limiting cavity under its elastic force, and the multiple elastic limiting ribs are evenly distributed along the circumferential distance of the limiting cavity.

9. A tool for protecting a bored pile hole as claimed in any one of claims 1 to 7, wherein, The limiting cavity is a conical limiting cavity, and the inner diameter of the conical limiting cavity gradually increases from top to bottom.

10. The protective tool for the bored pile hole as described in any one of claims 1 to 7, characterized in that, The warning cylinder is a conical warning cylinder, with a support ring formed on the bottom outer edge of the conical warning cylinder. The support ring is supported by the protective steel mesh, and a reflective film is provided on the outer surface of the conical warning cylinder.

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