Mountain slope drilling device and drilling method thereof

Abstract

The invention discloses a mountain slope drilling device and a drilling method thereof, and relates to the technical field of mountain slope drilling. The mountain slope drilling device comprises a vehicle body, a drilling assembly and a traction assembly, the vehicle body is used for moving on the mountain slope, the drilling assembly and the traction assembly are arranged at the two ends, in the first direction, of the vehicle body correspondingly, and the traction assembly comprises a traction unit and a guide frame; the traction unit is used for collecting or releasing a traction rope, the guide frame corresponds to the traction unit and is arranged on the side, away from the vehicle body, of the traction unit, the traction rope is used for penetrating through the guide frame, and the other end of the traction rope is used for being anchored to the top of a mountain slope. The mountain side slope drilling device can solve the problem that drilling operation cannot be carried out on a high and steep side slope with the height higher than 15 degrees and lower than 45 degrees through drilling equipment, is suitable for drilling operation of the mountain side slope, and improves the working efficiency of side slope drilling under the condition that construction safety is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of mountain slope drilling, and in particular to a mountain slope drilling device and a drilling method thereof. Background Art

[0002] Mountain photovoltaic project construction areas face complex terrain, with sites primarily characterized by gentle slopes or sloping terrain, and some areas experiencing steep slopes, ranging from 10° to 35°, with some areas experiencing slopes as high as 65°. Crawler-type down-the-hole drills are commonly used to drill holes on slopes up to 3°. However, direct application of these drills to the steep slopes of mountain photovoltaic projects poses a risk of overturning and poor safety and stability if slopes exceed 15°. Furthermore, manual drilling and digging operations are inefficient and pose safety risks. Summary of the Invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, an embodiment of the present invention proposes a mountain slope drilling device, which can solve the problem that drilling operations cannot be carried out on steep slopes with an angle of more than 15° and less than 45° through drilling equipment. The device is suitable for drilling operations on mountain slopes and improves the work efficiency of slope drilling while ensuring construction safety.

[0005] The embodiment of the present invention further provides a mountain slope drilling method.

[0006] The mountain slope drilling device according to an embodiment of the present invention comprises:

[0007] A vehicle body, the vehicle body being used for moving on a mountain slope;

[0008] A drilling assembly and a traction assembly, wherein the drilling assembly and the traction assembly are respectively arranged at the two ends of the vehicle body along the first direction, the traction assembly includes a traction unit and a guide frame, the traction unit is used to gather or release the traction rope, the guide frame is arranged corresponding to the traction unit and is arranged on the side of the traction unit away from the vehicle body, the traction rope is used to pass through the guide frame and the other end is used to be anchored at the top of the mountain slope.

[0009] The mountain slope drilling device of the embodiment of the present invention can solve the problem that drilling operations cannot be carried out on steep slopes with an angle of more than 15° and less than 45° using drilling equipment. It is suitable for drilling operations on mountain slopes and improves the efficiency of slope drilling while ensuring construction safety.

[0010] In some embodiments, the guide frame includes two parallel first rods and two parallel second rods, the first rods extend along a second direction, the second rods extend along a third direction perpendicular to the second direction, and the projections of the first rods and the second rods in the first direction limit a rectangular guide hole.

[0011] In some embodiments, the first rod is rotatably mounted on the vehicle body along its axis, and the second rod is rotatably mounted on the vehicle body along its axis.

[0012] The mountain slope drilling method according to an embodiment of the present invention includes the mountain slope drilling device according to any of the above embodiments, and includes the following steps:

[0013] S1: Select anchor holes at the top edge of the mountain slope and perform drilling operations at the selected anchor hole locations;

[0014] S2: Place the anchor rod in the anchor hole and pass the traction rope through the guide frame to connect it to the anchor rod;

[0015] S3: The traction rope is tightened by the traction unit to perform pre-tightening;

[0016] S4: Move the vehicle body and simultaneously release the traction rope to move the vehicle body to the slope of the mountain slope;

[0017] S5: Punching is performed in the horizontal and vertical directions on the slope surface of the mountain, and the traction rope is tightened or released by the traction unit to ensure that the traction rope is always taut;

[0018] S6: Repeat steps S1 to S5 to complete the drilling operation on the mountain slope.

[0019] The mountain slope drilling method of the embodiment of the present invention can solve the limitation that drilling operations cannot be carried out by drilling equipment on high and steep slopes with an angle of more than 15° and less than 45°. The traction rope is constrained by the guide frame to ensure the reliability of the connection between the traction rope and the traction unit, thereby realizing the horizontal drilling operation on the slope surface of the mountain slope, which is safe and reliable, and increases the effective drilling area on the mountain slope surface under the connection of a single anchor hole, thereby improving the drilling efficiency of the mountain slope.

[0020] In some embodiments, the guide frame includes two first rods and two second rods, the two first rods are arranged in parallel and extend along the second direction, the two second rods are arranged in parallel and extend along a third shape perpendicular to the second direction, the projections of the first rod and the second rod in the first direction are rectangular, and in step S5, the traction rope is matched with the first rod or the second rod.

[0021] In some embodiments, the two first rods are rotationally coupled to the vehicle body, and the two second rods are rotationally coupled to the vehicle body. In step S5, the traction rope is rollingly coupled to the first rod or the second rod.

[0022] In some embodiments, in step S1, when drilling the anchor hole, the drilling depth of the anchor hole is not less than 1.5 meters, and the distance between the anchor hole and the edge of the mountain slope is not less than 2 meters.

[0023] In some embodiments, in step S1, when drilling the anchor hole, the anchor hole is drilled in an inclined direction, and the horizontal distance between the top of the anchor hole and the edge of the mountain slope is greater than the horizontal distance between the bottom of the anchor hole and the edge of the mountain slope.

[0024] In some embodiments, in step S2, before the traction rope is connected to the anchor rod, an anti-slip assembly is provided at the end of the anchor rod, and the anti-slip assembly cooperates with the traction rope in the axial direction of the anchor rod.

[0025] In some embodiments, in step S3, when the traction rope is pre-tightened, the connection status between the anchor rod and the traction rope is determined. If the anchor rod shakes or falls out, steps S1 and S2 are repeated and the anchor rod is reinstalled. If the anchor rod is reliably connected to the traction rope, step S4 is performed. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a connection diagram of the mountain slope drilling device during operation according to an embodiment of the present invention.

[0027] Figure 2 It is a schematic structural diagram of a mountain slope drilling device according to an embodiment of the present invention.

[0028] Figure 3 It is a structural schematic diagram of the traction assembly in the mountain slope drilling device according to an embodiment of the present invention.

[0029] Reference numerals:

[0030] Body 1;

[0031] Drilling assembly 2;

[0032] Traction assembly 3; traction unit 31; guide frame 32; first rod 321; second rod 322; traction rope 33;

[0033] Anchor rod 4;

[0034] Mountain slope5. DETAILED DESCRIPTION

[0035] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0036] like Figure 1 、 Figure 2 and Figure 3 As shown, the mountain slope drilling device of the embodiment of the present invention includes a vehicle body 1, a drilling assembly 2 and a traction assembly 3. The vehicle body 1 is used to move on the mountain slope 5. The vehicle body 1 is a prior art and will not be described in detail here. For example, a crawler-type mobile base is used, and the drilling assembly 2 is also a prior art and will not be described in detail here. For example, a crawler-type down-the-hole drill is used as a drilling device, and the drilling assembly 2 is driven by a hydraulic arm to rotate to adjust the drilling direction when the hole assembly is drilling. The length direction of the vehicle body 1 is defined as a first direction, and the drilling assembly 2 and the traction assembly 3 are respectively arranged along the first direction of the vehicle body 1. At both ends of one direction, the drilling assembly 2 and the traction assembly 3 can be operated separately to avoid interference that may be caused by being set at the same end of the vehicle body 1. The traction assembly 3 includes a traction unit 31 and a guide frame 32. The traction unit 31 is used to gather or release the traction rope 33. The guide frame 32 is set corresponding to the traction unit 31 and is set on the side of the traction unit 31 away from the vehicle body 1. An anchor hole is selected at the top of the mountain slope 5, and an anchor rod 4 is installed in the anchor hole. The traction rope 33 is passed through the guide frame 32 and the other end is anchored on the anchor rod 4 at the top of the mountain slope 5.

[0037] The traction rope 33 is passed through the guide frame 32, and the end of the traction rope 33 is fixed to the anchor rod 4 at the top of the mountain slope 5. The traction rope 33 is pre-tightened by the traction unit 31, the vehicle body 1 is moved, and the traction rope 33 is released to move the vehicle body 1 to the slope surface of the mountain slope 5. The tightening of the traction rope 33 prevents the vehicle body 1 from slipping or overturning on the slope surface of the mountain slope 5, thereby ensuring the safe movement of the vehicle body 1. At the same time, after the vehicle body 1 moves to the set position, the drilling operation is carried out by the drilling assembly 2. At the same time, the traction rope 33 passes through the guide frame 32. When the vehicle body 1 moves laterally along the slope surface of the mountain slope 5, the guide frame 32 can prevent the traction rope 33 from slipping off the traction unit 31, thereby ensuring the connection reliability of the traction rope 33, thereby achieving effective traction of the drilling device, ensuring the safe movement of the vehicle body 1 laterally on the slope surface of the mountain slope 5, and thus improving the working efficiency of slope drilling.

[0038] It should be noted that when the drilling device is drilling on a mountain slope, the connection direction between the traction unit and the anchor rod is defined as the longitudinal direction, and the direction perpendicular to the connection direction between the traction unit and the anchor rod is defined as the transverse direction.

[0039] The mountain slope drilling device of the embodiment of the present invention pulls the vehicle body 1 through the traction rope 33, thereby increasing the force on the vehicle body 1 on the slope surface of the mountain slope 5, thereby improving the stability of the vehicle body 1 when moving on the slope surface of the mountain slope 5, solving the problem that drilling operations cannot be carried out by drilling equipment on high and steep slopes with an angle of more than 15° and less than 45°, making the drilling device suitable for drilling operations on the mountain slope 5, and improving the efficiency of slope drilling while meeting construction safety.

[0040] Optionally, a mounting frame is provided on the vehicle body 1 corresponding to the traction assembly 3, the traction unit 31 adopts a winch, and a brake assembly is connected to the winch to ensure that the winch does not rotate when the winch stops to tighten or release the traction rope 33.

[0041] In some embodiments, as Figure 2 and Figure 3 As shown, the guide frame 32 includes two parallel first rods 321 and two parallel second rods 322, the first rods 321 extend along the second direction, the second rods 322 extend along a third direction perpendicular to the second direction, and the projections of the first rods 321 and the second rods 322 in the first direction limit the rectangular guide holes.

[0042] Specifically, a horizontal plate is provided corresponding to the guide frame 32, the horizontal plate is fixedly connected to the mounting frame, and the horizontal plate is arranged on the side of the mounting frame away from the vehicle body 1, and the width direction of the vehicle body 1 is defined as the second direction. Among the two first rods 321, the lower first rod 321 is arranged on the horizontal plate, and the upper first rod 321 is arranged on the frame of the traction unit 31. The two second rods 322 are connected to the frame of the traction unit 31 through connecting protrusions. The projections of the first rod 321 and the second rod 322 in the first direction partially overlap, and multiple projections limit a rectangular guide hole to ensure that when the guide frame 32 guides the traction rope 33, the traction rope 33 is always in the guide space limited by the first rod 321 and the second rod 322 to avoid the traction rope 33 slipping off the traction unit 31, thereby ensuring the traction effect of the traction rope 33 on the vehicle body 1.

[0043] It should be noted that the third direction may be perpendicular to both the first and second directions, or may be perpendicular to only the second direction. When the third direction is perpendicular to both the first and second directions, the third direction is the height direction of the vehicle body 1 .

[0044] In some embodiments, as Figure 3 As shown, the first rod 321 is rotatably assembled on the vehicle body 1 along its axis, and the second rod 322 is rotatably assembled on the vehicle body 1 along its axis.

[0045] Specifically, both ends of the first rod 321 and the second rod 322 are provided with rotating bearings, and the rotating bearings are provided with bearing seats for fixed connection. The first rod 321 and the second rod 322 are rotated and assembled through the bearing seats and the rotating bearings. When the traction rope 33 is gathered or released, the sliding friction can be replaced by the rolling friction between the traction rope 33 and the first rod 321 or the second rod 322, thereby reducing the wear of the traction rope 33, and improving the service life of the traction rope 33, which is safe and reliable.

[0046] The following describes a mountain slope drilling method according to an embodiment of the present invention.

[0047] The mountain slope drilling method according to an embodiment of the present invention includes the mountain slope drilling device according to any of the above embodiments, and includes the following steps:

[0048] S1: Select anchor holes in the hard soil area at the top edge of the mountain slope and drill holes at the selected anchor hole locations;

[0049] S2: placing an anchor rod in the anchor hole, and passing a traction rope through the guide frame to connect to the anchor rod. Optionally, tying the end of the traction rope with an anchor bolt or a U-shaped lock to form a loop, and hanging the loop on the anchor rod;

[0050] S3: The traction rope is tightened by the traction unit to perform pre-tightening;

[0051] S4: Move the vehicle body and simultaneously release the traction rope to move the vehicle body to the slope of the mountain;

[0052] S5: Punching is performed in the horizontal and vertical directions on the slope surface of the mountain, and the traction rope is tightened or released by the traction unit to ensure that the traction rope is always taut;

[0053] S6: Repeat steps S1 to S5 to complete the drilling operation on the mountain slope.

[0054] The mountain slope drilling method of the embodiment of the present invention can solve the limitation that drilling operations cannot be carried out by drilling equipment on high and steep slopes with an angle of more than 15° and less than 45°. The traction rope is constrained by the guide frame to ensure the reliability of the connection between the traction rope and the traction unit, thereby realizing the horizontal drilling operation on the slope surface of the mountain slope, which is safe and reliable, and increases the effective drilling area on the mountain slope surface under the connection of a single anchor hole, thereby improving the drilling efficiency of the mountain slope.

[0055] Optionally, before connecting the traction rope to the anchor rod, the traction rope is inspected to ensure the connection strength of the traction rope, and the traction rope is replaced regularly. Preferably, the replacement time of the traction rope is 3 months.

[0056] Optionally, when drilling on a mountain slope, it is necessary to ensure that there are no personnel or machinery operating below the drilling area of ​​the mountain slope, and to take measures to prevent rockfall.

[0057] Optionally, before drilling on a mountain slope, the slope surface needs to be inspected and leveled to ensure that there are no areas with steep height differences on the slope surface and that the slope angles are consistent to facilitate movement of the vehicle on the slope surface.

[0058] In some embodiments, the guide frame includes two first rods and two second rods, the two first rods are arranged in parallel and extend along the second direction, the two second rods are arranged in parallel and extend along a third rectangle perpendicular to the second direction, and the projections of the first rod and the second rod in the first direction are rectangular. In step S5, the traction rope is matched with the first rod or the second rod.

[0059] The traction rope is guided and constrained by setting a first rod and a second rod. The projections of the first rod and the second rod in the first direction partially overlap, and multiple projections limit a rectangular guide hole to ensure that when the guide frame guides the traction rope, the traction rope is always in the guide space limited by the first rod and the second rod to avoid the traction rope slipping off the traction unit, thereby ensuring the traction effect of the traction rope on the vehicle body. The structure is simple, easy to process, and safe and reliable.

[0060] In some embodiments, the two first rods are rotationally coupled to the vehicle body, and the two second rods are rotationally coupled to the vehicle body. In step S5, the traction rope is rollingly coupled to the first rod or the second rod.

[0061] By rotating and assembling the first rod and the second rod, when the traction rope is gathered or released, the sliding friction can be replaced by the rolling friction between the traction rope and the first rod or the second rod, thereby reducing the wear of the traction rope, increasing the service life of the traction rope, and being safe and reliable.

[0062] In some embodiments, in step S1, when drilling the anchor hole, the drilling depth of the anchor hole is not less than 1.5 meters, and the distance between the anchor hole and the edge of the mountain slope is not less than 2 meters.

[0063] By placing a minimum limit on the drilling depth, the stability of the anchor rod after installation is ensured, and the anchor rod is prevented from falling out of the anchor hole. The position of the anchor hole is restricted, and the anchoring force of the mountain slope soil layer or rock layer structure on the anchor rod is increased, avoiding damage to the mountain slope layer or rock layer structure when the anchor rod is subjected to force, thereby preventing the anchor rod from falling out, which is safe and reliable.

[0064] In some embodiments, in step S1, when drilling the anchor hole, the anchor hole is drilled in an inclined direction, and the horizontal distance between the top of the anchor hole and the edge of the mountain slope is greater than the horizontal distance between the bottom of the anchor hole and the edge of the mountain slope.

[0065] By drilling the anchor hole at an angle, after the anchor rod is installed, the anchoring force of the mountain slope layer or rock layer structure on the anchor rod can be increased, and the reliability of the anchor rod in the anchor hole can be increased.

[0066] Optionally, the angle between the extension direction of the anchor hole and the vertical direction is not greater than 60°, so as to ensure the embedding depth of the anchor rod under a certain length of the anchor rod, thereby ensuring the installation reliability of the anchor rod.

[0067] In some embodiments, in step S2, before the traction rope is connected to the anchor rod, an anti-slip assembly is provided at the end of the anchor rod, and the anti-slip assembly cooperates with the traction rope in the axial direction of the anchor rod.

[0068] Specifically, the anti-slip component is a baffle, two of which are arranged at intervals along the circumference of the anchor rod, and the baffle extends radially along the anchor rod, or the anti-slip component is a baffle, which is coaxially arranged at the end of the anchor rod. By sleeve-fitting the traction rope onto the anchor rod, when the traction rope is pre-tightened, the traction rope cooperates with the anti-slip component to prevent the traction rope from slipping off the end of the anchor rod, which is safe and reliable.

[0069] Optionally, the anchor rod may be a hollow rod or a solid rod.

[0070] In some embodiments, in step S3, when the traction rope is pre-tightened, the connection status between the anchor rod and the traction rope is determined. If the anchor rod shakes or falls out, steps S1 and S2 are repeated and the anchor rod is reinstalled. If the anchor rod is reliably connected to the traction rope, step S4 is performed.

[0071] By verifying the connection status of the anchor rod and the traction rope when the traction rope preload is tightened, it is convenient to ensure the reliability of the connection between the traction rope and the vehicle body when drilling on mountain slopes, ensuring the safety of the drilling operation.

[0072] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0073] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0074] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0075] 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 intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally 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 diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0076] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0077] 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 change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A mountain slope drilling device, characterized in that: include: A vehicle body, the vehicle body being used for moving on a mountain slope; A drilling assembly and a traction assembly, wherein the drilling assembly and the traction assembly are respectively arranged at the two ends of the vehicle body along the first direction, the traction assembly includes a traction unit and a guide frame, the traction unit is used to gather or release the traction rope, the guide frame is arranged corresponding to the traction unit and is arranged on the side of the traction unit away from the vehicle body, the traction rope is used to pass through the guide frame and the other end is used to be anchored at the top of the mountain slope.

2. The mountain slope drilling device according to claim 1, characterized in that: The guide frame includes two parallel first rods and two parallel second rods, the first rods extend along a second direction, the second rods extend along a third direction perpendicular to the second direction, and the projections of the first rods and the second rods in the first direction limit a rectangular guide hole.

3. The mountain slope drilling device according to claim 2, characterized in that: The first rod is rotatably mounted on the vehicle body along its axis, and the second rod is rotatably mounted on the vehicle body along its axis.

4. A mountain slope drilling method, based on the mountain slope drilling device according to any one of claims 1 to 3, characterized in that: The following steps are involved: S1: Select anchor holes at the top edge of the mountain slope and perform drilling operations at the selected anchor hole locations; S2: Place the anchor rod in the anchor hole and pass the traction rope through the guide frame to connect it to the anchor rod; S3: The traction rope is tightened by the traction unit to perform pre-tightening; S4: Move the vehicle body and simultaneously release the traction rope to move the vehicle body to the slope of the mountain slope; S5: Punching is performed in the horizontal and vertical directions on the slope surface of the mountain, and the traction rope is tightened or released by the traction unit to ensure that the traction rope is always taut; S6: Repeat steps S1 to S5 to complete the drilling operation on the mountain slope.

5. The mountain slope drilling method according to claim 4, characterized in that: The guide frame includes two first rods and two second rods, the two first rods are arranged in parallel and extend along the second direction, the two second rods are arranged in parallel and extend along a third shape perpendicular to the second direction, the projections of the first rod and the second rod in the first direction are rectangular, and in step S5, the traction rope is matched with the first rod or the second rod.

6. The mountain slope drilling method according to claim 5, characterized in that: The two first rods are rotationally coupled to the vehicle body, and the two second rods are rotationally coupled to the vehicle body. In step S5, the traction rope is rollingly coupled to the first rod or the second rod.

7. The mountain slope drilling method according to claim 4, characterized in that: In step S1, when drilling the anchor hole, the drilling depth of the anchor hole is not less than 1.5 meters, and the distance between the anchor hole and the edge of the mountain slope is not less than 2 meters.

8. The mountain slope drilling method according to claim 6, characterized in that: In step S1, when drilling the anchor hole, the anchor hole is drilled in an inclined direction, and the horizontal distance between the top of the anchor hole and the edge of the mountain slope is greater than the horizontal distance between the bottom of the anchor hole and the edge of the mountain slope.

9. The mountain slope drilling method according to claim 4, characterized in that: In step S2, before the traction rope is connected to the anchor rod, an anti-slip assembly is provided at the end of the anchor rod, and the anti-slip assembly cooperates with the traction rope in the axial direction of the anchor rod.

10. The mountain slope drilling method according to claim 4, characterized in that: In step S3, when the traction rope is pre-tightened, the connection status of the anchor rod and the traction rope is determined. If the anchor rod shakes or falls out, steps S1 and S2 are repeated and the anchor rod is reinstalled. If the anchor rod is reliably connected to the traction rope, step S4 is performed.

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