A rectangular pile drilling method and auxiliary drilling equipment thereof

Abstract

The present invention relates to the technical field of rotary drilling construction in hard rock geology, and in particular to a rectangular pile drilling method and its auxiliary drilling equipment. The rectangular pile drilling method comprises the following steps: S1, determining the range of the rectangular lock mouth and constructing the rectangular lock mouth. S2, using a first drill bit to drill holes downward along the edge of the rectangular lock mouth in sequence, and the first drill bit is tangent to at least one side of the rectangular lock mouth each time it drills a hole. S3, using a second drill bit to drill holes downward along the edge of the rectangular lock mouth again to form an underdug portion, the drilling diameter of the second drill bit is twice the drilling diameter of the first drill bit, and the second drill bit is tangent to at least two sides of the rectangular lock mouth each time it drills a hole. S4, using auxiliary drilling equipment to repair the hole. By first using a small-diameter first drill bit to drill holes along the edge of the lock mouth in sequence to form an initial drill hole, and finally using a large-diameter second drill bit to perform the final drill hole to form the portion to be repaired, while ensuring the drilling efficiency, the underdug portion in the pile hole is minimized to the greatest extent.

Description

Technical Field

[0001] The invention relates to the technical field of hard rock geological rotary drilling construction equipment, in particular to a rectangular pile hole forming method and a hole repairing device thereof for assisting the hole forming. Background Art

[0002] Rectangular anti-slide piles are currently widely used in slope support projects. Existing mechanized construction methods initially use a rotary drilling rig with a large-diameter drill bit to pilot the hole (generally a two-hole method). A drilling rig then uses a drilling rig as an auxiliary tool to drill the underdrilled section. However, large-diameter rotary drilling bits are less efficient when piloting the hole, especially in hard rock conditions. Furthermore, the drilling rig generates significant vibrations during full-section drilling, increasing its workload, impacting its durability, and increasing subsequent maintenance costs. Summary of the Invention

[0003] (1) Technical issues to be resolved

[0004] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a rectangular pile drilling method and auxiliary drilling equipment, which solves the technical problems of low efficiency of rotary drilling in hard rock geology and poor drilling effect of drilling equipment.

[0005] (2) Technical solution

[0006] In order to achieve the above objectives, the main technical solutions adopted by the present invention include:

[0007] An embodiment of the present invention provides a rectangular pile hole forming method, comprising the following steps:

[0008] S1. Determine the range of the rectangular lock opening and carry out the construction of the rectangular lock opening;

[0009] S2. Use a first drill bit to drill holes downwardly along the edge of the rectangular lock opening in sequence to form initial drill holes around the edge of the rectangular lock opening, and each time the first drill bit drills a hole, it is tangent to at least one side of the rectangular lock opening;

[0010] S3, using a second drill bit to drill a hole downwardly along the edge of the rectangular lock opening to form an underdug portion with a hole to be repaired, wherein the drilling diameter of the second drill bit is twice the drilling diameter of the first drill bit, and each time the second drill bit drills a hole, it is tangent to at least two sides of the rectangular lock opening;

[0011] S4. Use auxiliary hole-drilling equipment to repair the under-excavated part.

[0012] Optionally, the ratio of the longitudinal width to the transverse width of the rectangular lock opening is 3:2;

[0013] The hole-guiding trajectories of adjacent first drill bits in the longitudinal direction and the transverse direction are tangent to each other.

[0014] Optionally, the width of the rectangular lock opening in the longitudinal direction is 3m, the width in the transverse direction is 2m, the diameter of the first drill bit is 1m, and the first drill bit is provided with three tangent small drill holes along the longitudinal direction of the rectangular lock opening, and the small drill holes at both ends are tangent to the same longitudinal edge of the rectangular lock opening and a corresponding transverse edge thereof, respectively, and the small drill hole in the middle is tangent to the same longitudinal edge of the rectangular lock opening;

[0015] The first drill bit is provided with two tangent small drill holes along the transverse direction of the rectangular lock opening, and the two small drill holes are respectively tangent to a corresponding longitudinal edge and the same transverse edge of the rectangular lock opening.

[0016] Optionally, the diameter of the second drill bit is 2m, and the second drill bit is provided with two intersecting large drill holes along the longitudinal direction of the rectangular lock mouth, and the second drill bit is tangent to the two longitudinal edges of the rectangular lock mouth and a corresponding transverse edge thereof.

[0017] Optionally, step S1 includes the following steps:

[0018] S11, determine the range of the rectangular lock opening and lay out the lines;

[0019] S12, tying steel bars;

[0020] S13, pouring concrete to form the rectangular lock opening.

[0021] In a second aspect, a drilling device for assisting hole formation is provided, wherein the device is based on the rectangular pile drilling method;

[0022] The auxiliary hole-forming repairing device includes a mounting bracket and a transmission mechanism mounted on the mounting bracket;

[0023] The mounting bracket is a rectangular frame structure, and the top of the mounting bracket is connected to the rotary drilling rod;

[0024] The transmission mechanism includes four transmission bodies arranged at intervals, and the four transmission bodies are respectively connected to the four corners of the mounting bracket;

[0025] The transmission body can repair the underdug part of the hole to be repaired.

[0026] Optionally, the transmission body includes a motor, a reducer, a support frame, a universal joint and a repair drill bit connected in sequence from top to bottom;

[0027] The motor drives the repair drill bit through the reducer and the universal shaft to drill the underdug part.

[0028] Furthermore, the repairing drill bit is a square drill bit.

[0029] Furthermore, the motor, the reducer, the support frame, the universal joint and the repair drill bit are connected by bolts.

[0030] Furthermore, the mounting bracket includes a rectangular frame and a connecting rod perpendicular to the rectangular frame and connected to the rotary drilling rod.

[0031] (3) Beneficial effects

[0032] The beneficial effects of the present invention are as follows: a rectangular pile hole forming method of the present invention first uses a small-diameter first drill bit to drill holes along the edge of the lock mouth in sequence to form an initial hole, and finally uses a large-diameter second drill bit to perform a final hole forming a smaller area of ​​a hole to be repaired. While ensuring the hole drilling efficiency, the under-dug part in the pile hole is minimized.

[0033] Accordingly, a rectangular pile drilling method can be used in conjunction with an auxiliary drilling repair device. Because the hole to be repaired is small, a single mounting bracket and its corresponding four transmission bodies can smoothly repair the underdug portion. After trimming, the pile hole still meets the drilling requirements, improving drilling efficiency. This also reduces equipment wear and improves equipment durability. Furthermore, the auxiliary drilling repair device is simplified, thereby reducing the overall construction cost of the pile hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is a flow chart of the rectangular pile hole forming method of the present invention;

[0035] Figure 2 Flowchart of step S1 of the rectangular pile hole forming method of the present invention;

[0036] Figure 3 It is a main cross-sectional view with a rectangular lock;

[0037] Figure 4 It is a left side cross-sectional view with a rectangular lock;

[0038] Figure 5 This is a schematic diagram of the use of a first drill bit for drilling a hole in a rectangular pile during rotary drilling in the present invention;

[0039] Figure 6 This is a schematic diagram of using a second drill bit to drill a hole in a rotary drilling method for rectangular piles according to the present invention;

[0040] Figure 7 It is a schematic diagram of the under-excavation in the rectangular pile hole after the hole-guiding is completed in the rectangular pile hole forming method of the present invention;

[0041] Figure 8 It is a structural schematic diagram of the auxiliary hole-forming and repairing equipment of the present invention;

[0042] Figure 9 For the present invention Figure 8 Schematic diagram of the structure of a transmission body.

[0043] [Description of Reference Numerals]

[0044] 1: Mounting bracket; 11: Rectangular frame; 12: Connecting rod; 2: Transmission body; 21: Motor; 22: Reducer; 23: Support frame; 24: Universal joint; 25: Drill bit. DETAILED DESCRIPTION

[0045] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation methods in conjunction with the accompanying drawings.

[0046] See also Figure 1-Figure 7 As shown, a rectangular pile hole forming method includes the following steps:

[0047] S1. Determine the range of the rectangular lock opening 100 and construct the rectangular lock opening 100.

[0048] S2. Use the first drill bit to drill holes downward along the edge of the rectangular lock opening 100 in sequence to form initial holes around the edge of the rectangular lock opening 100, and the first drill bit is tangent to at least one side of the rectangular lock opening 100 each time a hole is drilled.

[0049] S3. Use a second drill bit to drill a hole downward along the edge of the rectangular lock opening 100 to form an underdug portion with a hole to be repaired, and the drilling diameter of the second drill bit is twice the drilling diameter of the first drill bit, and the second drill bit is tangent to at least two sides of the rectangular lock opening 100 each time it drills a hole.

[0050] S4. Use auxiliary hole-drilling equipment to repair the under-excavated part.

[0051] The initial holes are formed by first using a small diameter drill bit to drill holes along the edge of the lock. Figure 5 As shown, a second drill bit with a larger diameter is used for the final hole. Figure 6 As shown, a smaller hole to be repaired is formed ( Figure 7 The shaded area represents the hole to be repaired. While maintaining drilling efficiency, this method minimizes undercut within the pile hole. Only minimal undercut remains in the center of the pile hole, eliminating the need for trimming. This method reduces wear on the rotary drilling bit and reduces drilling costs.

[0052] Furthermore, step S1 includes the following steps:

[0053] S11 , determining the range of the rectangular lock opening 100 and laying out the lines.

[0054] S12. Bundle the steel bars.

[0055] S13 , pouring concrete to form a rectangular locking opening 100 .

[0056] It should be noted that to prevent the hole from collapsing, a concrete wall is placed at the hole mouth for stabilization. In simple terms, a reinforced concrete wall is built at the hole mouth, which is a rectangular lock mouth 100. The construction of the rectangular lock mouth 100 is a common construction method used in existing rotary drilling technology and will not be described in detail here.

[0057] Furthermore, the ratio of the longitudinal width to the transverse width of the rectangular lock 100 is 3:2. The drilling trajectories of adjacent first drill bits in both the longitudinal and transverse directions are tangent. Currently, the most commonly used pile hole on the market is a 3m×2m pile hole. Therefore, in this embodiment, a pile hole with a longitudinal width of 3m and a transverse width of 2m is used as an example. During actual use, the base for fixing the first or second drill bit can be appropriately adjusted for different sizes. The drilling process can be appropriately adjusted according to the specific size and specifications of the drill bit used to drill the hole, ultimately ensuring that the undercut in the middle portion is minimized.

[0058] In this embodiment, see Figure 5 As shown, the rectangular lock hole 100 has a longitudinal width of 3m and a transverse width of 2m. The diameter of the first drill bit is 1m. The first drill bit is provided with three tangential small drill holes along the longitudinal direction of the rectangular lock hole 100. The small drill holes at both ends are tangential to the same longitudinal edge and a corresponding transverse edge of the rectangular lock hole 100. The small drill hole in the middle is tangential to the same longitudinal edge of the rectangular lock hole 100. The purpose of these tangential holes is to maximize the drill bit's operating efficiency while ensuring the maximum drilling area, thereby shortening the overall drilling time. The first drill bit is provided with two tangential small drill holes along the transverse direction of the rectangular lock hole 100. The two small drill holes are tangential to a corresponding longitudinal edge and a common transverse edge of the rectangular lock hole 100, maximizing the benefits of drill bit use. It should be noted that the small size of the small drill holes here is relative and smaller than that of the second drill bit. The specific size needs to be further selected based on the transverse and longitudinal widths of the pile hole.

[0059] Furthermore, the second drill bit has a diameter of 2m and is provided with two intersecting large boreholes along the longitudinal direction of the rectangular lock hole 100. The second drill bit is tangent to both longitudinal edges and the corresponding transverse edge of the rectangular lock hole 100. The same applies to the large boreholes. This method minimizes undercut, ensuring minimal undercut after the pile hole is bored. It also avoids the need for subsequent full-section drilling equipment, significantly improving drilling efficiency.

[0060] In another aspect, a drilling-assisted repairing device is provided, based on the rectangular pile drilling method. The drilling-assisted repairing device comprises a mounting bracket 1 and a transmission mechanism mounted on the mounting bracket 1. The mounting bracket 1 is a rectangular frame structure, with the top of the mounting bracket 1 connected to the rotary drilling drill pipe. The transmission mechanism comprises four transmission bodies 2 spaced apart and connected to the four corners of the mounting bracket 1. The transmission bodies 2 are capable of repairing the underdrilled portion of the pilot hole to be repaired.

[0061] Compared with the existing method of using sixteen drill bits for drilling, this embodiment only uses four transmission bodies 2 for drilling, which greatly reduces the number of transmission bodies 2 of the drilling equipment, thereby reducing costs, reducing the number of maintenance times, and greatly improving the efficiency of drilling and hole formation. Based on a rectangular pile drilling method, an auxiliary drilling equipment can be used in conjunction. Since the part to be drilled is small, the under-dug part can be smoothly drilled through a mounting bracket 1 and the four transmission bodies 2 corresponding to the mounting bracket 1. After the trimming is completed, the pile hole can still meet the drilling requirements, thereby improving the drilling efficiency. At the same time, it reduces equipment loss and improves equipment durability. In addition, the auxiliary drilling equipment is simplified, thereby reducing the construction cost of the entire pile hole. The drilling equipment does not need to perform full-section trimming, the equipment is subjected to less vibration, and the loss generated is smaller, which reduces the equipment's later maintenance costs.

[0062] Furthermore, the transmission body 2 includes a motor 21, a reducer 22, a support frame 23, a universal joint 24, and a drill bit 25, which are connected in sequence from top to bottom. The motor 21 drives the drill bit 25 through the reducer 22 and universal joint 24 to drill the underdrilled area. This drill bit structure is simple and convenient for drilling holes.

[0063] Furthermore, the repair drill bit 25 is a square drill bit. The purpose of the square drill bit is to facilitate the adaptability of the four corners and to drill holes with higher quality.

[0064] Furthermore, the motor 21, the reducer 22, the support frame 23, the universal joint 24 and the drill bit 25 are connected by bolts, which makes it easy to install and disassemble, and convenient for subsequent maintenance and use.

[0065] Furthermore, the mounting bracket 1 comprises a rectangular frame 11 and a connecting rod 12 perpendicular to the rectangular frame and connected to the rotary drilling rod, which is convenient for connection with the rotary drilling rod and has high versatility.

[0066] Accordingly, a rectangular pile drilling method can be used in conjunction with an auxiliary drilling repair device. Because the hole to be repaired is small, a single mounting bracket and its corresponding four transmission bodies can smoothly repair the underdug portion. After trimming, the pile hole still meets the drilling requirements, improving drilling efficiency. This also reduces equipment wear and improves equipment durability. Furthermore, the auxiliary drilling repair device is simplified, thereby reducing the overall construction cost of the pile hole.

[0067] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0068] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0069] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0070] In the description of this specification, the terms "one embodiment", "some embodiments", "embodiments", "examples", "specific examples" or "some examples" refer to the specific features, structures, materials or characteristics described in conjunction with the embodiment or example and included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and features of different embodiments or examples, unless they are mutually inconsistent.

[0071] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may alter, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A rectangular pile hole forming method, characterized in that: The following steps are involved: S1, determining the range of the rectangular lock opening (100) and performing the construction of the rectangular lock opening (100); S2, using a first drill bit to drill holes downwardly along the edge of the rectangular lock opening (100) in sequence, so as to form initial drill holes around the edge of the rectangular lock opening (100), and each time the first drill bit drills a hole, it is tangent to at least one side of the rectangular lock opening (100); S3, using a second drill bit to drill a hole downwardly along the edge of the rectangular lock opening (100) to form an underdug portion with a hole to be repaired, wherein the drilling diameter of the second drill bit is twice the drilling diameter of the first drill bit, and each time the second drill bit drills a hole, it is tangent to at least two sides of the rectangular lock opening (100); S4. Use auxiliary hole-forming equipment to repair the under-dug part; The width of the rectangular lock opening (100) in the longitudinal direction is 3m, and the width in the transverse direction is 2m. The diameter of the first drill bit is 1m. The first drill bit is provided with three tangent small drill holes along the longitudinal direction of the rectangular lock opening (100), and the small drill holes at both ends are tangent to the same longitudinal edge of the rectangular lock opening (100) and a corresponding transverse edge thereof, respectively, and the small drill hole in the middle is tangent to the same longitudinal edge of the rectangular lock opening (100); The first drill bit is provided with two tangent small drill holes along the transverse direction of the rectangular lock opening (100), and the two small drill holes are respectively tangent to a corresponding longitudinal edge and the same transverse edge of the rectangular lock opening (100).

2. The rectangular pile hole forming method according to claim 1, characterized in that: The ratio of the width in the longitudinal direction to the width in the transverse direction of the rectangular locking opening (100) is 3:2; The hole-guiding trajectories of adjacent first drill bits in the longitudinal direction and the transverse direction are tangent to each other.

3. The rectangular pile hole forming method according to claim 1, characterized in that: The diameter of the second drill bit is 2m, and the second drill bit is provided with two intersecting large drill holes along the longitudinal direction of the rectangular lock opening (100), and the second drill bit is tangent to the two longitudinal edges of the rectangular lock opening (100) and a corresponding transverse edge thereof.

4. The rectangular pile hole forming method according to claim 1, wherein: The step S1 comprises the following steps: S11, determining the range of the rectangular lock opening (100) and laying out the line; S12, tying steel bars; S13, pouring concrete to form the rectangular locking opening (100).

5. A hole-repairing device for auxiliary hole forming, characterized in that: The device is based on the rectangular pile hole forming method according to any one of claims 1 to 4; The auxiliary hole-forming repairing device comprises a mounting bracket (1) and a transmission mechanism mounted on the mounting bracket (1); The mounting bracket (1) is in a rectangular frame structure, and the top of the mounting bracket (1) is connected to the rotary drilling rod; The transmission mechanism comprises four transmission bodies (2) arranged at intervals, and the four transmission bodies (2) are respectively connected to the four corners of the mounting bracket (1); The transmission body (2) is capable of repairing the underdug portion of the hole to be repaired.

6. The auxiliary hole-forming repairing device according to claim 5, characterized in that: The transmission body (2) comprises a motor (21), a reducer (22), a support frame (23), a universal joint (24) and a drilling bit (25) which are sequentially connected from top to bottom; The motor (21) drives the drilling drill (25) through the reducer (22) and the universal shaft (24) to drill the underdug portion.

7. The auxiliary hole-forming repairing device according to claim 6, characterized in that: The repairing drill bit (25) is a square drill bit.

8. The auxiliary hole-forming repairing device according to claim 7, characterized in that: The motor (21), the reducer (22), the support frame (23), the universal joint (24), and the repair drill bit (25) are connected via bolts.

9. The auxiliary hole-forming repairing device according to claim 7, characterized in that: The mounting bracket (1) comprises a rectangular frame (11) and a connecting rod (12) perpendicular to the rectangular frame and connected to a rotary drilling rod.

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