A drill pipe device and a method for removing underground anchor cables

Abstract

The present invention provides a drill rod device and a method for removing underground anchor cables, which relates to the technical field of shield tunneling construction. The drill rod device includes a rod body extending along a first direction; blades surrounding the rod body and extending along the first direction, the blades being fixedly connected to the rod body; wherein, one end of the blade forms a first cutting edge extending along a second direction, the second direction being perpendicular to the first direction; a sleeve disposed around one end of the blade close to the first cutting edge and fixedly connected to the blade, the sleeve being provided with a plurality of grooves spaced circumferentially along the sleeve. The method for removing underground anchor cables realizes the removal of underground anchor cables through the mutual cooperation of a first drill rod device and a second drill rod device. The drill rod device and the method for removing underground anchor cables of the present invention can effectively improve the construction efficiency and meet the economic requirements at the same time.

Description

Technical Field

[0001] The present invention relates to the technical field of shield tunneling construction, and more specifically, to a drill rod device and a method for removing underground anchor cables. Background Art

[0002] The shield tunneling construction method refers to a method of using a shield machine to control the excavation face and surrounding rock from collapsing and stabilizing, while tunneling the tunnel, discharging the muck, assembling segments in the machine to form a lining, and performing grouting behind the lining, so as to construct the tunnel without disturbing the surrounding rock.

[0003] During the construction process of the shield machine in the shield area, obstacles such as anchor cables or bolts left during the construction of the original underground foundation pit will be encountered. It is necessary to remove the underground anchor cables or bolts to avoid entanglement of the anchor cables or bolts on the cutter head of the shield machine, causing risks such as damage to the cutters of the shield machine, jamming of the screw conveyor, and opening the chamber for maintenance. Related removal methods include manual excavation (well) extraction method, adding scissor-shaped blades on the diaphragm wall grooving machine for cutting method, rotary drilling rig cutting and removal method, etc. The manual excavation (well) extraction method is time-consuming and laborious, with low efficiency; the method of adding scissor-shaped blades on the diaphragm wall grooving machine for cutting and the rotary drilling rig cutting and removal method have high costs and great construction risks. Summary of the Invention

[0004] In view of this, the main purpose of the present invention is to provide a drill rod device and a method for removing underground anchor cables, so as to solve the technical problem of how to improve the efficiency of removing obstacles such as underground anchor cables while meeting the economic requirements.

[0005] To achieve the above object, the technical solution of the present invention is realized as follows:

[0006] The present invention provides a drill rod device, including: a rod body extending along a first direction; blades surrounding the rod body and extending along the first direction, the blades being fixedly connected to the rod body; wherein, one end of the blade forms a first cutting edge extending along a second direction, the second direction being perpendicular to the first direction; a sleeve disposed around one end of the blade close to the first cutting edge and fixedly connected to the blade, the sleeve being provided with a plurality of grooves spaced circumferentially along the sleeve.

[0007] Further, one end of the groove is closed and the other end is open along the first direction, and the groove expands from the one end to the other end.

[0008] Further, a plurality of second cutting edges spaced circumferentially along the sleeve are formed on the sleeve, and each second cutting edge is adjacent to one of the grooves correspondingly.

[0009] Further, the second cutting edge extends along the first direction.

[0010] Further, one end of the groove is a plane or a sharp corner.

[0011] Further, one end of the groove is a smooth curved surface.

[0012] Further, the first blade is located above the second blade.

[0013] Further, there are two blades, which are arranged at equal intervals along the circumferential direction of the rod body.

[0014] The present invention also provides a method for removing underground anchor cables, including: operating a first drill rod device, the first drill rod device having: a rod body extending in a first direction; blades surrounding the rod body and extending in the first direction, the blades being fixedly connected to the rod body; wherein, one end of the blade forms a first blade extending in a second direction, the second direction being perpendicular to the first direction; a sleeve disposed around one end of the blade close to the first blade and fixedly connected to the blade, the sleeve being provided with a plurality of grooves spaced apart along the circumferential direction of the sleeve, and a plurality of second blades spaced apart along the circumferential direction of the sleeve are formed on the sleeve, each second blade corresponding to and adjacent to one of the grooves; stopping the operation and lifting the first drill rod device to the ground; operating a second drill rod device, the second drill rod device having: a rod body extending in a first direction; blades surrounding the rod body and extending in the first direction, the blades being fixedly connected to the rod body; wherein, one end of the blade forms a first blade extending in a second direction, the second direction being perpendicular to the first direction; a sleeve disposed around one end of the blade close to the first blade and fixedly connected to the blade, the sleeve being provided with a plurality of grooves spaced apart along the circumferential direction of the sleeve, one end of the groove is closed and the other end is open along the first direction, and the groove expands from the one end to the other end, and one end of the groove is a smooth curved surface.

[0015] Further, the operation of the first drill rod device includes: operating and pressing down the first drill rod device to a first preset depth of the soil body, and successively cutting off the anchor cables from top to bottom; wherein, the first blade of the first drill rod device is used for cutting the soil body, and the second blade of the first drill rod device is used for cutting off the anchor cables in the soil body; the operation of the second drill rod device includes: operating and pressing down the second drill rod device to a second preset depth of the soil body, and successively winding the anchor cables cut off by the first drill rod device; wherein, the first blade of the second drill rod device is used for cutting the soil body, and the groove of the second drill rod device is used for intercepting the anchor cables cut off by the first drill rod device.

[0016] The drill pipe device of the embodiment of the present invention includes a rod body, blades and a sleeve. A first cutting edge for cutting soil is formed at the end of the blade, and the sleeve is provided with a groove. The drill pipe device of the present invention can not only cut the soil through the first cutting edge, but also further process the groove structure to form a cutting edge with a cutting function or a groove with an obstacle winding function. The device has a simple and compact structure and low cost. Moreover, the method for removing underground anchor cables in the embodiment of the present invention, on the one hand, the first drill pipe device realizes the cutting of the underground anchor cable, and the second drill pipe device realizes the removal of the underground anchor cable, and the devices are independent of each other; on the other hand, the first drill pipe device and the second drill pipe device complete the removal of the anchor cable through a cooperative manner, which can improve the work efficiency. Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of the first drill pipe device of the embodiment of the present invention;

[0018] Figure 2a It is a schematic diagram of the arrangement mode of the first cutting edge of the embodiment of the present invention;

[0019] Figure 2b It is another schematic diagram of the arrangement mode of the first cutting edge;

[0020] Figure 3 It is a schematic structural diagram of the second drill pipe device of the embodiment of the present invention;

[0021] Figure 4 For Figure 1 It is a schematic diagram of a partial enlarged view at D;

[0022] Figure 5 For Figure 3 It is a schematic diagram of a partial enlarged view at E;

[0023] Figure 6a It is a schematic diagram of the working principle of the first drill pipe device of the embodiment of the present invention;

[0024] Figure 6b It is a schematic diagram of the working principle of the second drill pipe device in a working state of the embodiment of the present invention;

[0025] Figure 6c It is a schematic diagram of the working principle of the second drill pipe device in another working state of the embodiment of the present invention.

[0026] Description of the Reference Numerals:

[0027] 10 - Rod body, 11 - End of the rod body, 20 - Blade, 21 - First cutting edge, 30 - Sleeve, 31 - Groove, 311 - First groove, 3111 - Hypotenuse of the first groove, 312 - Second groove, 3121 - Hypotenuse of the second groove, 32 - Second cutting edge, 33 - Lower end face of the sleeve, S - Anchor cable, A - First drill rod device, B - Second drill rod device, θ - Angle between the second cutting edge and the horizontal direction Detailed implementation mode

[0028] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0029] In the various specific technical features described in the specific embodiments, they can be combined in any suitable manner without conflict. For example, different embodiments and technical solutions can be formed by combining different specific technical features. To avoid unnecessary repetition, various possible combination methods of the various specific technical features in the present invention will not be described separately.

[0030] In the following description, the terms "first / second" only distinguish different objects and do not indicate that there is any same or related relationship between the two. It should be understood that the orientation descriptions "above" and "below" are the orientations in the normal use state.

[0031] It should be noted that the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of another identical element in the process, method, article or device including the element. The term "connection" includes both direct connection and indirect connection unless otherwise specified. The term "plurality" means greater than or equal to two. The "first direction" refers to the length extension direction of the drill rod device.

[0032] The present invention provides a drill rod device and a method for removing underground anchor cables, which can be used as a tool for removing underground bolts or anchor cables or other underground obstacles in the shield area to assist tunnel construction, and can be widely applied to the construction of subway tunnels or other tunnels. It should be noted that the application scenario type of the present invention does not limit the drill rod device of the present invention.

[0033] In the embodiment of the present invention, as Figure 1As shown, the drill pipe device includes a rod body 10, blades 20, and a sleeve 30. The rod body 10 extends in the first direction. It should be noted that the first direction refers to the length extension direction of the drill pipe device (such as Figure 1 the up and down direction shown). The rod body 10 can be a generally cylindrical rod-shaped object, and the drill pipe device rotates around the central axis of the rod body 10. As Figure 2a shown, the end 11 of the rod body 10 is in the shape of a sharp cone, which is convenient for breaking soil. The outer surface of the rod body 10 is provided with blades 20. The blades 20 surround the rod body 10 and extend in the first direction. Specifically, the blades 20 extend circumferentially and radially on the outside of the rod body 10 to achieve the effect of surrounding the rod body 10, and also extend along the length direction of the rod body 10, that is, the first direction. The blades 20 are fixedly connected to the rod body 10. Specifically, the blades 20 can be integrally formed with the rod body 10, or can be fixedly connected to the rod body 10 by means of welding or bonding. The shape of the blades 20 can be arbitrary. It can be spiral, spirally rising upward from the end of the rod body 10 along the first direction, or can be rectangular, arranged at intervals around the rod body 10. In an exemplary embodiment, the spiral blade structure is used for subsequent elaboration. The number of the blades 20 can be arbitrary, it can be one, or can be multiple. In the working state, the outer edge of the blades 20 of the drill pipe device can scrape the soil body to achieve the function of soil expansion.

[0034] As Figure 2a shown, one end of the blade 20 forms a first cutting edge 21 extending in the second direction, and the second direction is perpendicular to the first direction. Specifically, the second direction is the horizontal direction as Figure 2a shown. The cross-sectional shape of the first cutting edge 21 can be arbitrary. It should be noted that the cross-section refers to the plane perpendicular to the second direction. The cross-section can be triangular, trapezoidal, etc. In an exemplary embodiment, the first cutting edge 21 with a triangular cross-sectional shape is used for subsequent description. The number of the first cutting edges 21 can be arbitrary, it can be one, or can be multiple. As Figure 2a shown, a first cutting edge 21 is provided at the end of the blade 20. As Figure 2b shown, multiple first cutting edges 21 are arranged at intervals. In an exemplary embodiment, the first cutting edge 21 is selected in the arrangement manner as Figure 2a shown. The long side of the first cutting edge 21 is arranged in the radial direction of the rod body 10, and the thickness of the first cutting edge 21 changes gradually. It should be noted that the thickness refers to the distance between two relatively large-area faces of a sheet-like or block-like object. The cross-section of the first cutting edge 21 is triangular, that is, the thickness of the first cutting edge 21 is variable. The thinner end is the end of the blade 20, which rotates with the rotation of the rod body 10 to cut the soil body.

[0035] As Figure 1As shown, the sleeve 30 is arranged around one end of the blade 20 close to the first cutting edge 21 and is fixedly connected to the blade 20. Specifically, the sleeve 30 can be a cylindrical barrel structure. The sleeve 30 is arranged at one end of the blade 20 close to the end of the rod body 10 with a conical structure. The outer diameter of the sleeve 30 is approximately the same as the rotation radius of the drill pipe device. The inner wall surface of the sleeve 30 is fixedly connected to the outer edge of the lower blade 20. The sleeve 30 is provided with a plurality of grooves 31 spaced circumferentially along the sleeve 30. Specifically, in the working state, grooves 31 are opened at the outer edge of the lower end of the sleeve 30 along the first direction, and the opening direction of the grooves 31 is downward. There are a plurality of grooves 31. In an exemplary embodiment, the grooves 31 can be equally spaced along the circumferential direction of the sleeve 30. The shape of the grooves 31 is arbitrary. Since the thickness of the sleeve 30 is relatively thin, the shape of the grooves 31 can be approximately regarded as a planar figure, which can be a rectangle, a parallelogram, an arc, a gradually expanding type, etc., and can be flexibly set according to the actual situation. Combining the actual requirements and production processes, further design and processing can be carried out on the sleeve 30 with grooves 31, and more functions can be given to the sleeve 30 by combining the structural characteristics of the grooves 31 itself. For example, the sleeve 30 can be formed into a cutting edge with a cutting function or the sleeve 30 can be formed into a groove with a function of winding obstacles. This can better streamline the structure of the drill pipe device and save costs.

[0036] In the embodiment of the present invention, by arranging a rod body, a blade, and a sleeve on the drill pipe device, a first cutting edge for cutting soil is formed at the end of the blade. The sleeve is provided with grooves, and by combining the processing technology and the structural characteristics of the grooves, a cutting edge with a cutting function or a groove with a function of winding obstacles can be further processed on the sleeve. The drill pipe device of the present invention has strong functionality, can not only cut the soil body, but also cut and wind obstacles, and the device has a simple and compact structure and low cost.

[0037] In some embodiments, as Figure 1 shown, along the first direction, one end of the groove 31 is closed and the other end is open, and the groove 31 expands from one end to the other end. Specifically, the height of the groove 31 is less than the height of the sleeve 30. It should be noted that the height of the groove 31 refers to the length of the groove extending along the first direction. That is to say, the groove 31 does not penetrate the length direction of the sleeve 30, that is, one end of the groove 31 is closed and the other end is open. In the working state, the opening shape of the groove 31 gradually shrinks upward along the first direction, that is, the width of the open end of the groove 31 is large and the width of the closed end is small. It should be noted that the width refers to the distance between two opposite faces of the groove 31. As Figure 1 shown, it is an opening form of a groove 31. As Figure 3As shown, it is another opening form of the groove 31. By specifically setting the groove structure, a cutting edge with a cutting function or a groove with an obstacle winding function can be further processed. The structural design is simple and ingenious, which can simplify the processing technology.

[0038] In some embodiments, as Figure 1 shown, a plurality of second cutting edges 32 are formed on the sleeve 30 and are circumferentially spaced apart along the sleeve 30. Each second cutting edge 32 corresponds to being adjacent to a groove 31. Specifically, as Figure 4 shown, the second cutting edge 32 is located between the first groove 311 and the second groove 312, connecting the hypotenuse 3111 of the first groove 311 and the hypotenuse 3121 of the second groove 312. The angle between the second cutting edge 32 and the horizontal direction is θ, and 0° < θ < 90°. The inclined second cutting edge 32 enables it to have a cutting function. As Figure 5 shown, the second cutting edge 32 is parallel to the horizontal direction, that is, the angle θ is 0°. In this state, the second cutting edge 32 does not have a cutting function. Combining the structural characteristics of the groove 31 and further processing the sleeve 30, the sleeve 30 is formed into a cutting edge with a cutting function, so that there is no need to separately provide a blade or a cutting edge on the sleeve 30. The drill rod device with the second cutting edge 32 is called the first drill rod device A. The first drill rod device A can cut the underground anchor cable S through the second cutting edge 32. By forming a second cutting edge with a cutting function on the sleeve, there is no need to separately provide a blade or a cutting edge on the sleeve, which simplifies the structure of the drill rod device and also reduces the material cost.

[0039] In some embodiments, as Figure 4 shown, the second cutting edge 32 extends along the first direction. Specifically, since the length extension direction of the groove 31 is the first direction, the length extension direction of the second cutting edge 32 is also the first direction. In this way, when the first drill rod device A is lowered in the working state, the head of the second cutting edge 32 can contact and cut the anchor cable S.

[0040] In some embodiments, as Figure 1 shown, one end of the groove 31 is a plane or a sharp angle. In this state, it is to enable the groove 31 to be further processed to have a second cutting edge 32 so that the drill rod device has a cutting function. Specifically, the root between adjacent second cutting edges 32 is in a sharp angle transition, that is, the end face of the closed end of the groove 31 is a plane. This structural form can simplify the production process of the first drill rod device.

[0041] In some other embodiments, as Figure 3As shown, one end of the groove 31 is a smooth curved surface. In this state, the groove 31 is designed to have only a winding function rather than a cutting function. Specifically, the closed end of the groove 31 is an arc surface, and the lower end surface 33 of the sleeve is parallel to the horizontal direction, that is, the sleeve 30 of this structure does not have a cutting function. It should be noted that the extending direction of each groove 31 is related to the rotation direction of the drill pipe device in the working state. Specifically, the extending direction of each groove 31 from the open end to the closed end is inclined towards the rotation direction of the drill pipe device. For example, as Figure 3 shown, the drill pipe device rotates clockwise ( Figure 3 the direction indicated by the arrow in the figure), and the extending direction of the groove 31 from the open end to the closed end is inclined towards the clockwise rotation direction of the drill pipe device. The drill pipe device with the arc-shaped groove 31 described above is called the second drill pipe device B. In the working state, the groove 31 of the second drill pipe device B can wind the cut anchor cable S into the groove 31 from the open end of the groove 31, and the larger opening design of the open end can also make it easier for the anchor cable S to pass through the open end of the groove 31. With the rotation of the second drill pipe device B, the anchor cable S moves along the channel of the groove 31 to the closed end of the groove 31 and is intercepted, and the tapered design from the open end to the closed end can also reduce the risk of the intercepted anchor cable S escaping. One end of the anchor cable S is fixed in one groove 31, and the other end of the anchor cable S is fixed in another opposite groove 31. With the high-speed rotation of the second drill pipe device B, the intercepted anchor cable S can be wound around the rod body 10 or the blade 20, so as to roll up and remove the cut anchor cable S in the soil body. Since both the sleeve 30 and the anchor cable S are rigid structures, the high-speed rotation causes the closed end of the groove 31 to be subjected to the extrusion force from the anchor cable S and is easily damaged. The end face of the closed end of the groove 31 is set as an arc surface, which can effectively reduce the stress concentration at the closed end of the groove 31. By processing the closed end of the groove into an arc surface, the second drill pipe device has the function of winding the anchor cable, and the structural design is simple and ingenious, and it is also easy to be formed and processed.

[0042] In some embodiments, as Figure 1 shown, the first cutting edge 21 is located above the second cutting edge 32. Specifically, the function of the first cutting edge 21 is to cut the soil body, and the function of the second cutting edge 32 is to cut the anchor cable S. To avoid the first cutting edge 21 affecting the normal operation of the second cutting edge 32 and to protect the first cutting edge 21 from being damaged by the anchor cable S, along the first direction, the first cutting edge 21 needs to be set above the second cutting edge 32. By setting the first cutting edge above the second cutting edge, the first cutting edge can be protected from being damaged while ensuring the normal operation of each component.

[0043] In some embodiments, as Figure 2aAs shown, there are two blades 20, which are arranged at equal intervals along the circumferential direction of the rod body 10. Specifically, considering the efficiency and cost of cutting the soil body comprehensively, two blades 20 can be arranged around the rod body 10. To ensure the stability of the work, the two blades 20 are arranged at equal intervals along the circumferential direction of the rod body 10.

[0044] Taking the removal of underground anchor cables as an example, in combination with Figures 6a - 6c The working principle of the drill pipe device will be exemplarily described. The drill pipe device may include a first drill pipe device A and a second drill pipe device B. The removal process can be roughly divided into two steps. The first step is that the first drill pipe device A cuts off the anchor cable S. The specific process is as follows: As Figure 6a shown, align the end of the first drill pipe device A with the first construction area to be constructed. It should be noted that the first construction area to be constructed refers to the area where there are anchor cables underground, and the approximate position of the first construction area to be constructed can be estimated through the survey drawing. Operate the first drill pipe device A to make the first drill pipe device A rotate at a high speed and gradually lower the drill pipe, and cut and grind the soil body through the end of the first drill pipe device A. As the first drill pipe device A continuously extends into the soil body to contact the anchor cable S buried in the soil body, the end of the first drill pipe device A is provided with blades, which can cut off the anchor cable S. After cutting off all the anchor cables S from top to bottom in sequence, stop operating and lift the first drill pipe device A to complete the work of cutting off the anchor cable S. The second step is that the second drill pipe device B winds and removes the anchor cable S cut by the first drill pipe device A. The specific process is as follows: As Figure 6b shown, align the end of the second drill pipe device B with the second construction area to be constructed. It should be noted that the second construction area to be constructed refers to the approximate middle area in the horizontal direction of the cut-off anchor cable. Operate the second drill pipe device B to make the second drill pipe device B rotate at a high speed and gradually lower the drill pipe, and cut and grind the soil body through the end of the second drill pipe device B. As the second drill pipe device B continuously extends into the soil body to contact the cut-off anchor cable S, the end of the second drill pipe device B is provided with a winding component, and with the high-speed rotation of the second drill pipe device B, the cut-off anchor cable S can be wound around the second drill pipe device B. As Figure 6c shown, after winding all the cut-off anchor cables S from top to bottom in sequence, reduce the rotation speed or stop operating the second drill pipe device B, and lift the second drill pipe device B to complete the work of removing the anchor cable S. The drill pipe device completes the removal work of the underground anchor cable through the above two processes.

[0045] The embodiment of the present invention also provides a method for removing underground anchor cables, including the following steps:

[0046] The first step: Operate the first drill pipe device A. As Figure 1 shown, the first drill pipe device A has: a rod body 10, blades 20 and a sleeve 30. The rod body 10 extends along the first direction; the blades 20 surround the rod body 10 and extend along the first direction, and the blades 20 are fixedly connected to the rod body 10; wherein, asFigure 2a As shown, one end of the blade 20 forms a first cutting edge 21 extending in the second direction, and the second direction is perpendicular to the first direction; the sleeve 30 is arranged around one end of the blade 20 close to the first cutting edge 21 and is fixedly connected to the blade 20. The sleeve 30 is provided with a plurality of grooves 31 distributed at intervals along the circumferential direction of the sleeve 30, as Figure 1 shown, a plurality of second cutting edges 32 are formed on the sleeve 30 and distributed at intervals along the circumferential direction of the sleeve 30. Each second cutting edge 32 is adjacent to one groove 31 correspondingly. Specifically, the first drill rod device A can cut off the anchor cable S.

[0047] Step 2: Stop the operation and lift the first drill rod device A to the ground.

[0048] Step 3: Operate the second drill rod device B. As Figure 3 shown, the second drill rod device B includes: a rod body 10, a blade 20, and a sleeve 30. The rod body 10 extends in the first direction; the blade 20 surrounds the rod body 10 and extends in the first direction, and the blade 20 is fixedly connected to the rod body 10; wherein, as Figure 2a shown, one end of the blade 20 forms a first cutting edge 21 extending in the second direction, and the second direction is perpendicular to the first direction; the sleeve 30 is arranged around one end of the blade 20 close to the first cutting edge 21 and is fixedly connected to the blade 20. The sleeve 30 is provided with a plurality of grooves 31 distributed at intervals along the circumferential direction of the sleeve 30. One end of the groove 31 is closed and the other end is open along the first direction. The groove 31 expands from one end to the other end, and one end of the groove 31 is a smooth curved surface. Specifically, the second drill rod device B can take out the anchor cable S.

[0049] In the method for removing underground anchor cables according to the embodiments of the present invention, on the one hand, the first drill rod device realizes the work of cutting the anchor cable, and the second drill rod device realizes the work of winding and taking out the anchor cable. The two devices are independent of each other, with clear division of labor, and the device structure is simple and the cost is low; on the other hand, the first drill rod device and the second drill rod device complete the removal of the anchor cable through mutual cooperation, which can improve the work efficiency.

[0050] In some embodiments, as Figure 6a shown, operating the first drill rod device A includes: operating and pressing down the first drill rod device A to a first preset depth of the soil body, and successively cutting off the anchor cable S from top to bottom; wherein, the first cutting edge 21 of the first drill rod device A is used for cutting the soil body, and the second cutting edge 32 of the first drill rod device A is used for cutting off the anchor cable S in the soil body. Specifically, the first cutting edge 21 cuts and expands the soil body, and the second cutting edge 32 cuts off the anchor cable S in the soil body, realizing the work of the first drill rod device cutting off the anchor cable S. By arranging the first cutting edge and the second cutting edge on the first drill rod device, the structure is simple and easy for process production, and at the same time, the operation is simple and fast, which can improve the construction efficiency.

[0051] As Figure 6b and6c As shown, operating the second drill pipe device B includes: operating and pressing down the second drill pipe device B to the second preset depth of the soil mass. It should be noted that the second preset depth may be the same as or different from the first preset depth, depending on the position state of the underground anchor cable S. For example, as Figure 6a shown, the anchor cable S has a certain inclination angle with the horizontal ground, then the second preset depth is greater than the first preset depth. Winding the anchor cable S cut by the first drill pipe device A from top to bottom in sequence; wherein, the first cutting edge 21 of the second drill pipe device B is used for cutting the soil mass, and the groove 31 of the second drill pipe device B is used for intercepting the anchor cable S cut by the first drill pipe device A. Specifically, by cutting and expanding the soil mass with the first cutting edge 21, the groove 31 can intercept and wind the cut anchor cable S around the second drill pipe device B, thereby removing the cut anchor cable in the soil mass. The winding of the anchor cable can be realized through the groove of the second drill pipe device, and the structural design is simple and ingenious, with low cost.

[0052] The above is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims

1. A drill pipe device, characterized in that, the drill pipe device is used to remove underground anchor cables. The drill pipe device includes a first drill pipe and a second drill pipe device. The first drill pipe device has: a rod body extending along a first direction, extending along the length direction of the rod body, i.e., the first direction; blades surrounding the rod body and extending along the first direction, the blades being fixedly connected to the rod body; wherein, one end of the blade forms a first cutting edge extending along a second direction, the second direction being perpendicular to the first direction; a sleeve disposed around one end of the blade near the first cutting edge and fixedly connected to the blade, wherein the inner wall surface of the sleeve is fixedly connected to the outer edge of the blade, the sleeve is provided with a plurality of grooves circumferentially spaced apart along the sleeve, the grooves are equidistantly arranged along the circumferential direction of the sleeve, and a plurality of second cutting edges circumferentially spaced apart along the sleeve are formed on the sleeve, each second cutting edge corresponding to be adjacent to one of the grooves. Among them, the first cutting edge is located above the second cutting edge, and the angle between the second cutting edge and the horizontal direction is greater than 0° and less than 90°; the second cutting edge of the first drill pipe device is used to cut off the anchor cable in the soil body; the second drill pipe device has: a rod body extending along a first direction; blades surrounding the rod body and extending along the first direction, the blades being fixedly connected to the rod body; wherein, one end of the blade forms a first cutting edge extending along a second direction, the second direction being perpendicular to the first direction, a sleeve disposed around one end of the blade near the first cutting edge and fixedly connected to the blade, the lower end surface of the sleeve being parallel to the horizontal direction, the sleeve is provided with a plurality of grooves circumferentially spaced apart along the sleeve, one end of the groove is closed and the other end is open along the first direction, the groove expands from one end to the other end, the one end of the groove is a smooth curved surface, and the extending direction of the groove from the open end to the closed end is inclined in the clockwise direction. The groove of the second drill pipe device is used to intercept the anchor cable cut off by the first drill pipe device.

2. The drill pipe device according to claim 1, characterized in that, in the first drill pipe device, the second cutting edge extends along the first direction.

3. The drill pipe device according to claim 1, characterized in that, in the first drill pipe device, the one end of the groove is a plane or a sharp corner.

4. The drill pipe device according to claim 1, characterized in that, in the first drill pipe device, there are two blades, which are equidistantly spaced along the circumferential direction of the rod body.

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