An anchor-free soil-assisted drilling protection device

Abstract

The present invention discloses a self-anchored soil layer auxiliary drilling protection device, which relates to the technical field of drilling auxiliary equipment. It includes a frame body, a casing is installed inside the frame body, an internal thread sleeve is fixedly installed inside the casing, a propulsion assembly is threadedly connected inside the internal thread sleeve, a driving assembly is fixedly connected to the outer wall of the casing, and the driving assembly is in transmission connection with the propulsion assembly. Rectangular adjustment grooves are respectively formed on the front and rear sides and the left side of the frame body, an adjustment rod is installed inside the rectangular adjustment grooves, and the end of the adjustment rod is connected to the casing. The bottom of the propulsion assembly is detachably connected with a protection assembly, a spiral rib for conveying soil residues is integrally arranged on the outside of the protection assembly, the bottom of the protection assembly is detachably connected with an end clamping plate, an expansion blade is integrally arranged on the outside of the end clamping plate, a conical drill bit is installed at the bottom of the end clamping plate, a spiral blade is integrally arranged on the outside of the conical drill bit, and a cutter head is fixedly connected to the bottom of the conical drill bit. The device of the present invention has a simple structure, reasonable design and convenient operation.

Description

Technical Field

[0001] The present invention relates to the technical field of drilling auxiliary equipment, and particularly relates to a self-anchored soil layer auxiliary drilling protection device. Background Art

[0002] In soil protection projects such as foundation pits and slopes, anchor rods have the advantages of strong adaptability, simple construction and installation, high space utilization rate, low cost, and long service life, and are widely used in practical projects such as the initial support or final support of soil masses. In some foundation pit reinforcement projects, the working area is small and mechanized operation cannot be carried out, so a self-drilling reinforcement system has been developed. For example, "A self-drilling prestressed soil nail and construction method" (CN110409469A) proposes a method of self-drilling and anchoring through the nail tip, nail rod, and helix, but it fails to truly achieve self-drilling and still requires the assistance of auxiliary machinery. Another example is "A self-drilling soil nail and reinforced retaining wall connection system and method" (CN111254949A). This invention connects the self-drilling soil nail and the reinforced retaining wall through connecting components to increase the overall stability of the structure, but the steps are cumbersome and the applicable conditions are single.

[0003] In particular, the anchor rod lacks a self-drilling prestressed anchor rod that integrates functions such as automatically expanding the hole and discharging rock and soil debris without external auxiliary machinery.

[0004] Therefore, there is an urgent need for a self-anchored soil layer auxiliary drilling protection device to solve the problems existing in the above-mentioned prior art. Summary of the Invention

[0005] The purpose of the present invention is to provide a self-anchored soil layer auxiliary drilling protection device to solve the problems existing in the prior art.

[0006] To achieve the above purpose, the present invention provides the following solution: The present invention provides a self-anchored soil layer auxiliary drilling protection device, including a frame body. A casing is installed inside the frame body. An internal thread sleeve is fixedly installed inside the casing. A propulsion component is threadedly connected inside the internal thread sleeve. A driving component is fixedly connected to the outer wall of the casing. The driving component is in transmission connection with the propulsion component. Rectangular adjustment slots are respectively opened on the front and rear sides and the left side of the frame body. An adjustment rod is installed inside the rectangular adjustment slot. The end of the adjustment rod is connected to the casing. The bottom of the propulsion component is detachably connected to a protection component. A spiral rib for transporting soil and slag is integrally provided on the outside of the protection component. A plurality of end clamping plates are detachably connected to the bottom of the protection component. An expansion hole blade is fixedly connected to the end clamping plate. A conical drill bit is installed at the bottom of the end clamping plate. A spiral blade is integrally provided on the outside of the conical drill bit. A cutter head is fixedly connected to the bottom of the conical drill bit. One end of a steel strand is passed through the propulsion component and welded to the center position at the top end of the conical drill bit.

[0007] Preferably, the driving assembly includes a support plate fixedly connected to the sleeve. A motor is fixedly connected to the top surface of the support plate. A transmission shaft is fixedly connected to the output shaft of the motor. A multi-joint telescopic rod is installed at the bottom of the transmission shaft by bolts. A gear is fixedly connected to the bottom of the multi-joint telescopic rod. The gear is in transmission connection with the propulsion assembly.

[0008] Preferably, the propulsion assembly includes a hollow screw threadedly connected to the internal thread sleeve. A toothed ring is fixedly sleeved on the hollow screw. The toothed ring meshes with the gear. An auxiliary plate is in contact with the bottom of the toothed ring. The auxiliary plate is rotatably connected to the outer wall of the outer casing of the hollow screw. The bottom of the gear is rotatably connected to the auxiliary plate. An installation plate is fixedly connected to the bottom end of the hollow screw. The installation plate is detachably connected to the protection assembly.

[0009] Preferably, the protection assembly includes a number of end hole protection members and hole protection connectors arranged alternately. The topmost end hole protection member is detachably connected to the installation plate. The lowermost end hole protection member is detachably connected to the end clamping plate.

[0010] Preferably, the end hole protection member and the hole protection connector are respectively formed by splicing two semi-circular end hole protection plates and two semi-circular connecting hole protection plates. The end hole protection plate and the connecting hole protection plate have the same structure. A plurality of end clamping grooves for clamping the end clamping plate are formed in the bottom surface of the tubular structure formed by splicing the two end hole protection plates along the circumferential direction. The spiral ribs are integrally arranged on the outer surface of the end hole protection plate. A slider group is integrally arranged on the right side wall of the left end hole protection plate. A chute group for fitting the slider group is formed on the left side wall of the right end hole protection plate.

[0011] Preferably, the two end hole protection plates are assembled through the slider group and the chute group. The slider group is composed of four sliders. The four sliders are grouped in pairs and are respectively arranged on the corresponding side walls of the left end hole protection plate. Through holes are formed in the front and rear side walls of each end hole protection plate. The through holes between the two side end hole protection plates correspond to each other and are fixedly connected by fastening bolts. A lifting lug plate is installed on the top outer wall of each end hole protection plate. The lifting lug plates on the adjacent end hole protection plate and the connecting hole protection plate correspond to each other and are fixedly connected by bolts. The lifting lug plate on the end hole protection plate is fixedly connected to the installation plate by bolts.

[0012] Preferably, a carrier plate is movably connected in the rectangular adjustment groove. A passage groove is longitudinally formed in the carrier plate. Among them, a collar is slidably connected in the front passage groove. An internal thread ring is slidably connected in the rear and left passage grooves. The front end of the front adjustment rod penetrates through the collar, and a buffer spring is sleeved behind the collar and located on the corresponding adjustment rod.

[0013] Preferably, the rear end of the adjusting rod at the rear side penetrates through the corresponding internally threaded ring, and an adjusting handle I is installed. Moreover, the adjusting rod at the rear side is threadedly connected with the corresponding internally threaded ring. A limiting sleeve located on the corresponding adjusting rod is threadedly connected between the frame body and the adjusting handle I, and this limiting sleeve is used for limiting the longitudinal adjustment of the sleeve.

[0014] Preferably, the left end of the adjusting rod at the left side penetrates through the corresponding internally threaded ring, and an adjusting handle II is installed. Moreover, the adjusting rod at the left side is threadedly connected with the corresponding internally threaded ring. A limiting sleeve located on the corresponding adjusting rod is also sleeved between the frame body and the adjusting handle II, and this limiting sleeve is used for limiting the lateral adjustment of the sleeve.

[0015] Preferably, support feet are fixedly connected to the four corners of the bottom surface of the frame body, and the bottoms of the support feet extend into the ground.

[0016] The present invention discloses the following technical effects: Through the combination of the driving assembly, the propulsion assembly and the conical drill bit, the present invention enables the protective assembly to drive the conical drill bit to perform a rotary drilling motion under the action of rotary propulsion, so that it continuously drills into the rock and soil. During the drilling process, the automatic slag discharge is realized through the arrangement of the spiral ribs, and at the same time, the function of protecting the hole is achieved, thereby ensuring the overall automation and maintaining normal operation for a long time; the device of the present invention has a simple structure, reasonable design and convenient operation; when the driving assembly rotates reversely, the propulsion assembly rotates outwards, and at the same time, grouting is carried out. The slurry gradually diffuses around the steel strand and solidifies, increasing the frictional resistance. After reaching a certain strength, the steel strand is tensioned to apply prestress, thereby forming a prestressed anchor rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of this application are used to provide a further understanding of this application. The schematic embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation to this application. In the drawings:

[0018] Figure 1 is a schematic three-dimensional structure diagram of a self-anchored soil layer auxiliary drilling protection device;

[0019] Figure 2 is Figure 1 the bottom view structure diagram of;

[0020] Figure 3 is Figure 2 the enlarged partial structure diagram at A of;

[0021] Figure 4 is the structure diagram of the driving assembly;

[0022] Figure 5 is Figure 4 the bottom view structure diagram of;

[0023] Figure 6 is Figure 5 The enlarged schematic diagram of the local structure at position B of

[0024] Figure 7 is Figure 1 The explosion diagram of the protection component of

[0025] Figure 8 is Figure 7 The enlarged schematic diagram of the local structure at position C of

[0026] In the figure: 1. Cutting head; 2. Taper drill bit; 3. Helical blade; 4. End clamping plate; 5. Reaming blade; 6. End hole protection plate; 7. Connecting hole protection plate; 8. Frame body; 9. Support feet; 10. Carrier plate; 11. Sleeve; 12. Adjusting rod; 13. Internal thread sleeve; 14. Propulsion assembly; 141. Hollow screw; 142. Tooth ring; 143. Auxiliary plate; 144. Mounting plate; 15. Driving assembly; 151. Motor; 152. Transmission shaft; 153. Multi - joint telescopic rod; 154. Gear; 16. Limit sleeve; 17. Steel strand; 18. End slot; 19. Helical rib; 20. Slide block group; 21. Slide groove group; 22. Fastening bolt. Specific embodiments

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0028] To make the above - mentioned objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0029] Refer to Figures 1 - 8As shown in the figure, this embodiment provides a self-anchored soil layer assisted drilling protection device, which includes a frame body 8. A casing 11 is installed inside the frame body 8. An internal thread sleeve 13 is fixedly installed inside the casing 11. A propulsion assembly 14 is threadedly connected inside the internal thread sleeve 13. A driving assembly 15 is fixedly connected to the outer wall of the casing 11. The driving assembly 15 is in transmission connection with the propulsion assembly 14. Rectangular adjustment grooves are respectively opened on the front and rear sides and the left side of the frame body 8. An adjustment rod 12 is installed inside the rectangular adjustment groove. The end of the adjustment rod 12 is connected to the casing 11. The bottom of the propulsion assembly 14 is detachably connected to a protection assembly. A spiral rib 19 for transporting soil slag is integrally arranged on the outside of the protection assembly. A plurality of end clamping plates 4 are detachably connected to the bottom of the protection assembly. An underreaming blade 5 is fixedly connected to the end clamping plate 4. A conical drill bit 2 is installed at the bottom of the end clamping plate 4. A spiral blade 3 is integrally arranged on the outside of the conical drill bit 2. A cutter head 1 is fixedly connected to the bottom of the conical drill bit 2. One end of a steel strand 17 passes through the propulsion assembly 14 and is welded to the center position at the top end of the conical drill bit 2. The number of the end clamping plates 4 ranges from two to six. Four are adopted in this embodiment. The opening diameter of the underreaming blade 5 is smaller than the opening diameter of the protection assembly.

[0030] Through the combination of the driving assembly 15, the propulsion assembly 14 and the conical drill bit 2, the protection assembly drives the conical drill bit 2 to perform a rotary drilling motion under the action of rotary propulsion, so that it continuously drills into the rock and soil. During the drilling process, the automatic slag discharge is realized through the setting of the spiral rib 19, and at the same time, the function of protecting the hole is achieved, so as to ensure the overall automation and maintain normal operation for a long time. The device of the present invention has a simple structure, reasonable design and convenient operation. When the driving assembly 15 rotates in the reverse direction, the propulsion assembly 14 rotates outwards, and at the same time, grouting is carried out. The slurry gradually diffuses around the steel strand 17 and solidifies, increasing the frictional resistance. After reaching a certain strength, the steel strand 17 is tensioned to apply prestress, so as to form a prestressed anchor rod.

[0031] In a further optimized solution, the driving assembly 15 includes a support plate fixedly connected to the casing 11. A motor 151 is fixedly connected to the top surface of the support plate. The output shaft of the motor 151 is fixedly connected to a transmission shaft 152. A multi-joint telescopic rod 153 is installed at the bottom of the transmission shaft 152 through bolts. A gear 154 is fixedly connected to the bottom of the multi-joint telescopic rod 153. The gear 154 is in transmission connection with the propulsion assembly 14. The operation of the motor 151 drives the multi-joint telescopic rod 153 to perform a synchronous rotational motion through the transmission shaft 152, and then drives the propulsion assembly 14 to rotate. The rotary feeding action is realized by driving with a single motor 151, reducing the setting of related supporting driving structures, optimizing the equipment structure, further reducing the manufacturing cost of the equipment, and facilitating the popularization and use of the equipment.

[0032] For a further optimized solution, the propulsion component 14 includes a hollow screw rod 141 threadedly connected to the internal thread sleeve 13. A toothed ring 142 is fixedly sleeved on the hollow screw rod 141. The toothed ring 142 meshes with a gear 154. An auxiliary plate 143 is in contact with the bottom of the toothed ring 142. The auxiliary plate 143 is rotatably connected to the outer wall of the outer casing of the hollow screw rod 141. The bottom of the gear 154 is rotatably connected to the auxiliary plate 143. The bottom end of the hollow screw rod 141 is fixedly connected with a mounting plate 144. The mounting plate 144 is detachably connected to the protection component. The auxiliary plate 143 is rotatably connected to the hollow screw rod 141. Thus, when the hollow screw rod 141 moves, the auxiliary plate 143 can cooperate with other structures to stay in place. The bottom end of the multi-section telescopic rod 153 is rotatably connected to the auxiliary plate 143. And above the auxiliary plate 143, there is a gear 154 located on the multi-section telescopic rod 153. The gear 154 and the toothed ring 142 are in meshing transmission. The multi-section telescopic rod 153 drives the gear 154 to rotate. And due to the meshing transmission between the gear 154 and the toothed ring 142, the hollow screw rod 141 rotates. When the hollow screw rod 141 is threadedly connected to the internal thread sleeve 13, the rotation of the hollow screw rod 141 enables it to perform rotary lifting adjustment. And when the hollow screw rod 141 performs lifting adjustment, due to the setting of the auxiliary plate 143, the multi-section telescopic rod 153 performs synchronous telescopic movement, thereby ensuring the meshing between the gear 154 and the toothed ring 142.

[0033] For a further optimized solution, the protection component includes a number of end hole protection parts and hole protection connecting parts arranged alternately. The topmost end hole protection part is detachably connected to the mounting plate 144. The lowermost end hole protection part is detachably connected to the end clamping plate 4. The hole protection connecting parts have the same shape as the end hole protection parts and are used to ensure the consistency of the drilled holes. The splicing design between the end hole protection parts and the hole protection connecting parts can be spliced with each other to form bolt holes of different lengths.

[0034] For a further optimized solution, the end hole protection part and the hole protection connecting part are respectively formed by splicing two semi-circular end hole protection plates 6 and two semi-circular connecting hole protection plates 7. The end hole protection plate 6 and the connecting hole protection plate 7 have the same structure. The bottom surface of the tubular structure formed by splicing the two end hole protection plates 6 is provided with a plurality of end clamping grooves 18 for clamping the end clamping plates 4 along the circumferential direction. A spiral rib 19 is integrally arranged on the outer surface of the end hole protection plate 6. A slider group 20 is integrally arranged on the right shell wall of the left end hole protection plate 6, and a chute group 21 for fitting the slider group 20 is provided on the left shell wall of the right end hole protection plate 6. The end hole protection part of the tubular structure ensures the formation of the anchor hole. The number of the end clamping grooves 18 provided is consistent with that of the end clamping plates 4, which is used to ensure the stable operation of the whole. The setting of the spiral rib 19 can discharge the soil residues generated after the product drills the hole outwards. When the two end hole protection plates 6 are combined, the spiral ribs 19 arranged thereon form a continuous spiral structure; the cooperation between the slider group 20 and the chute group 21 can realize the smooth combination and disassembly of the two end hole protection plates 6, so as to facilitate the disassembly and assembly operation of the product.

[0035] For a further optimized solution, the two end hole protection plates 6 are assembled through the slider group 20 and the chute group 21. The slider group 20 is composed of four sliders. The four sliders are grouped in pairs of two and are respectively arranged on the corresponding side walls of the left end hole protection plate 6. Through holes are provided on the front and rear shell walls of each end hole protection plate 6. The through holes between the two side end hole protection plates 6 correspond to each other and are fixedly connected through fastening bolts 22. A lifting lug plate is installed on the top outer wall of each end hole protection plate 6. The lifting lug plates on the adjacent end hole protection plates 6 and the connecting hole protection plates 7 correspond to each other and are fixedly connected through bolts. The lifting lug plate on the end hole protection plate 6 is fixedly connected to the mounting plate 144 through bolts. The setting of the fastening bolts 22 can stably assemble the two combined end hole protection plates 6.

[0036] The tubular parts formed by the split design are assembled in a sliding splicing manner, and then the fastening bolts 22 are used to ensure the stability of their assembly. It is not only convenient for disassembly and assembly, but also ensures its stability and safety during drilling use. Moreover, the convenient disassembly and assembly formed by the split design facilitates its removal operation when withdrawing from the hole.

[0037] For a further optimized solution, a carrier plate 10 is movably connected in the rectangular adjustment groove. A through groove is longitudinally formed on the carrier plate 10. Among them, a collar is slidably connected in the front through groove, and an internally threaded ring is slidably connected in the through grooves at the rear and on the left. The front end of the front adjustment rod 12 penetrates through the collar, and a buffer spring is sleeved behind the collar on the corresponding adjustment rod 12. The settings of the collar and the internally threaded ring in the corresponding through grooves are used to ensure the lifting adjustment of the sleeve 11, so as to facilitate the assembly and disengagement between the end hole protection parts. The setting of the buffer spring can cache the movement of the sleeve 11 in the longitudinal adjustment. The front adjustment rod 12 is fixedly connected to the sleeve 11 to provide stable support for the sleeve 11.

[0038] For a further optimized solution, the rear end of the rear adjustment rod 12 penetrates through the corresponding internally threaded ring and is provided with a first adjustment handle. Moreover, the rear adjustment rod 12 is threadedly connected to the corresponding internally threaded ring. A limit sleeve 16 located on the corresponding adjustment rod 12 is threadedly connected between the frame 8 and the first adjustment handle. This limit sleeve 16 is used for the longitudinal adjustment of the sleeve 11. The rear adjustment rod 12 is rotatably connected to the sleeve 11, and thus the rotation adjustment of the rear adjustment rod 12 can be realized; a friction pad is arranged on the rear outer wall of the frame 8, and thus the stability of the sleeve 11 during use is ensured through the contact between the limit sleeve 16 and the friction pad.

[0039] For a further optimized solution, the left end of the left adjustment rod 12 penetrates through the corresponding internally threaded ring and is provided with a second adjustment handle. Moreover, the left adjustment rod 12 is threadedly connected to the corresponding internally threaded ring. A limit sleeve 16 located on the corresponding adjustment rod 12 is also sleeved between the frame 8 and the second adjustment handle. This limit sleeve 16 is used for the lateral adjustment of the sleeve 11. A friction pad is also arranged on the left outer wall of the frame 8 to improve the effect of limiting the limit sleeve 16.

[0040] For a further optimized solution, support feet 9 are respectively fixedly connected to the four corners of the bottom surface of the frame 8, and the bottoms of the support feet 9 extend into the ground. The setting of the support feet 9 is used to facilitate the stable setting of the frame 8 on the ground.

[0041] Working principle: First, check whether each component is complete, and then fix the support feet 9 on the frame 8 to the ground. Before drilling, the drilling position of the anchor rod is adjusted and determined by adjusting the position of the sleeve 11 in the tail propulsion mechanism.

[0042] When first performing a lateral adjustment on the sleeve 11 in the tail propulsion mechanism, adjust the limit sleeves 16 on the left and rear adjustment rods 12 in the tail propulsion mechanism so that they are no longer in contact with the corresponding side walls of the frame 8. Then adjust the second adjustment handle on the rear adjustment rod 12 so that the rear adjustment rod 12 moves. It moves in cooperation with the corresponding internally threaded ring, and drives the sleeve 11 to perform a lateral displacement adjustment inside the frame 8 under the cooperation of the front and rear adjustment rods 12 and the corresponding...

[0043] After the casing 11 is horizontally adjusted to the appropriate position, adjust the adjustment handle 1 on the rear adjustment rod 12 in the tail propulsion mechanism. During the rotation of the rear adjustment rod 12, the cooperation between it and the corresponding internal thread ring realizes the longitudinal position adjustment of the casing 11 inside the frame 8. When the casing 11 moves longitudinally, the front adjustment rod 12 moves in the corresponding collar, and the buffer spring moves accordingly to ensure the stability of the displacement adjustment of the casing 11.

[0044] After completing the adjustment of the position of the casing 11, adjust the corresponding limit sleeve 16 again so that it contacts and limits the corresponding side wall of the frame 8 to ensure the stability of the position of the casing 11.

[0045] After the position of the casing 11 is determined, one end of the steel strand 17 passes through the hollow screw 141 of the propulsion assembly 14 and is welded to the center position at the top end of the conical drill bit 2. Then, the end hole protection part is sleeved on the upper steel strand 17 in a splicing manner to wrap the steel strand 17. After the end hole protection part finishes wrapping the steel strand 17, the lug plate at the top position in the end hole protection plate 6 of the end hole protection part is fixedly connected to the mounting plate 144 in the propulsion assembly 14 by bolts.

[0046] After the end hole protection part is assembled with the propulsion assembly 14, each end slot 18 on its bottom is engaged with the end clamping plate 4 at its lower position.

[0047] Then, by starting the motor 151 in the drive assembly 15, the multi-section telescopic rod 153 rotates under the action of the transmission shaft 152, thereby driving the gear 154 to rotate. The gear 154 meshes with the gear ring 142 in the propulsion assembly 14, and then the hollow screw 141 drives the mounting plate 144 to rotate synchronously.

[0048] During the rotation of the hollow screw 141, the mounting plate 144 drives the end hole protection part loaded with it to rotate synchronously, and finally the end clamping plate 4 engaged with the end hole protection part moves synchronously. Since the cutter head 1 contacts the ground, when the hollow screw 141 is in threaded cooperation with the internal thread sleeve 13 located in the casing 11, the cutter head 1 rotates and moves downward during rotation, realizing the drilling operation in the rock and soil.

[0049] When the end hole protection part still needs to be continuously drilled after being drilled into the soil layer, the end hole protection part is removed from the mounting plate 144 in the propulsion assembly 14, and then the motor 151 in the drive assembly 15 is started in reverse to reset the propulsion assembly 14. Finally, after the hole protection connecting part wraps the steel strand 17 in the way of assembling with the end hole protection part, its top is connected to the mounting plate 144, and the bottom is connected to the end hole protection part, so as to realize the splicing between the end hole protection part and the hole protection connecting part.

[0050] After the splicing is completed, start the motor 151 in the drive assembly 15 to run forward again. In this way, the drilling of the ground is realized, and it is repeated in a cycle. According to the depth of the hole to be drilled, the end hole protection part and the hole protection connecting part are selectively spliced.

[0051] After the hole is drilled to the specified depth, loosen the limit sleeve 16 arranged on the rear and left side again, and then lift the casing 11 integrally. Due to the arrangement of the passing groove, the casing 11 can be lifted and adjusted for a short distance, so as to separate the end clamping plate 4 from the end clamping groove 18 in the end hole protection part. Then, grout is injected into the pipe through the hollow screw 141, the end hole protection part and the hole protection connecting part. While injecting grout, start the reverse operation of the motor 151 in the drive assembly 15, so that the end hole protection part and the hole protection connecting part rotate outwards. When the hole protection connecting part leaves the hole, first turn off the operation of the motor 151 in the drive assembly 15 and stop grouting, then remove the hole protection connecting part from the mounting plate 144 and the end hole protection part in the propulsion assembly 14, and remove each fastening bolt 22 on the hole protection connecting part. Finally, the two connecting hole protection plates 7 are split in a smooth forward and backward movement manner, so as to facilitate the disassembly of the hole protection connecting part.

[0052] After the hole protection connecting part is disassembled, splice the end hole protection part with the mounting plate 144 in the propulsion assembly 14. Start the reverse operation of the motor 151 in the drive assembly 15 again and perform the grouting operation again. When the end hole protection part completely leaves the hole, repeat the above operation to realize the disassembly operation of the end hole protection part. After the grout reaches a certain strength, then tension the steel strand 17 outwards to form a prestressed anchor rod.

[0053] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention, 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 cannot be understood as a limitation to the present invention.

[0054] The embodiments described above are only descriptions of the preferred embodiments of the present invention and do not limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made by those of ordinary skill in the art to the technical solutions of the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A self-anchored soil layer auxiliary drilling protection device, characterized in that: The invention comprises a frame (8), wherein a sleeve (11) is installed in the frame (8), an inner thread sleeve (13) is fixedly installed in the sleeve (11), a propulsion assembly (14) is connected to the inner thread sleeve (13), a driving assembly (15) is fixedly connected to the outer wall of the sleeve (11), and the driving assembly (15) is transmission-connected to the propulsion assembly (14), and rectangular adjustment grooves are respectively provided on the front and rear sides and the left side of the frame (8), an adjustment rod (12) is installed in the rectangular adjustment groove, the end of the adjustment rod (12) is connected to the sleeve (11), and the propulsion assembly (14) A protective component is detachably connected to the bottom, and a spiral rib (19) for conveying soil debris is integrally arranged on the outer side of the protective component. A plurality of end clamps (4) are detachably connected to the bottom of the protective component, and a hole expansion blade (5) is fixedly connected to the end clamp (4). A conical drill bit (2) is installed at the bottom of the end clamp (4), and a spiral blade (3) is integrally arranged on the outer side of the conical drill bit (2). A cutter head (1) is fixedly connected to the bottom of the conical drill bit (2). One end of the steel strand (17) passes through the propulsion component (14) and is welded to the top center position of the conical drill bit (2).

2. The self-anchored soil layer auxiliary drilling protection device according to claim 1 is characterized in that: The driving assembly (15) comprises a support plate fixedly connected to the sleeve (11); a motor (151) is fixedly connected to the top surface of the support plate; an output shaft of the motor (151) is fixedly connected to a transmission shaft (152); a multi-section telescopic rod (153) is mounted on the bottom of the transmission shaft (152) via bolts; a gear (154) is fixedly connected to the bottom of the multi-section telescopic rod (153); and the gear (154) is transmission-connected to the propulsion assembly (14).

3. The self-anchored soil layer auxiliary drilling protection device according to claim 2 is characterized in that: The propulsion assembly (14) comprises a hollow screw (141) threadedly connected to the inner threaded sleeve (13); a fixed sleeve on the hollow screw (141) is provided with a toothed ring (142); the toothed ring (142) is meshed with the gear (154); the bottom of the toothed ring (142) contacts an auxiliary plate (143); the auxiliary plate (143) is rotatably connected to the outer ring shell wall of the hollow screw (141); the bottom of the gear (154) is rotatably connected to the auxiliary plate (143); the bottom end of the hollow screw (141) is fixedly connected to a mounting plate (144); the mounting plate (144) is detachably connected to the protective assembly.

4. The self-anchored soil layer auxiliary drilling protection device according to claim 3 is characterized in that: The protection assembly comprises a plurality of staggered end hole protection members and hole protection connecting members, wherein the end hole protection member located at the top is detachably connected to the mounting plate (144), and the end hole protection member located at the bottom is detachably connected to the end clamping plate (4).

5. The self-anchored soil layer auxiliary drilling protection device according to claim 4 is characterized in that: The end hole guard piece and the hole guard connecting piece are respectively formed by splicing two semicircular end hole guard plates (6) and two semicircular connecting hole guard plates (7). The end hole guard plates (6) and the connecting hole guard plates (7) have the same structure. The bottom surface of the tubular structure formed by splicing the two end hole guard plates (6) is provided with a plurality of end clamping grooves (18) for clamping the end clamping plate (4) along the circumferential direction. The outer surface of the end hole guard plate (6) is integrally provided with the spiral rib (19). A slider group (20) is integrally provided on the right side shell wall of the left end hole guard plate (6). A slide groove group (21) for fitting with the slider group (20) is provided on the left side shell wall of the right end hole guard plate (6).

6. The self-anchored soil layer auxiliary drilling protection device according to claim 5 is characterized in that: The two end hole guard plates (6) are assembled through the slider group (20) and the slide groove group (21). The slider group (20) is composed of four sliders. The four sliders are arranged in groups of two and are respectively arranged on the corresponding side walls of the left end hole guard plate (6). Each end hole guard plate (6) is provided with a through hole on the front and rear side shell walls. The through holes between the end hole guard plates (6) on both sides correspond to each other and are fixedly connected by fastening bolts (22). A lug plate is installed on the top outer wall of each end hole guard plate (6). The lug plates on adjacent end hole guard plates (6) and the connecting hole guard plate (7) correspond to each other and are fixedly connected by bolts. The lug plates on the end hole guard plates (6) are fixedly connected to the mounting plate (144) by bolts.

7. The self-anchored soil layer auxiliary drilling protection device according to claim 1 is characterized in that: A carrier plate (10) is movably connected in the rectangular adjustment groove, and a passage groove is longitudinally opened on the carrier plate (10), wherein a sleeve is slidably connected in the front passage groove, and an inner groove ring is slidably connected in the rear and left passage grooves, and the front end of the front adjustment rod (12) passes through the sleeve ring, and a buffer spring located on the corresponding adjustment rod (12) is sleeved behind the sleeve ring.

8. The self-anchored soil layer auxiliary drilling protection device according to claim 7 is characterized in that: The rear end of the rear adjustment rod (12) passes through the corresponding inner groove ring and is installed with an adjustment handle 1, and the rear adjustment rod (12) is threadedly connected to the corresponding inner groove ring, and a limiting sleeve (16) located on the corresponding adjustment rod (12) is threadedly connected between the frame (8) and the adjustment handle 1, and the limiting sleeve (16) is used to limit the longitudinal adjustment of the sleeve (11).

9. The self-anchored soil layer auxiliary drilling protection device according to claim 8, characterized in that: The left end of the left adjusting rod (12) passes through the corresponding inner groove ring and is provided with an adjusting handle 2, and the left adjusting rod (12) is threadedly connected to the corresponding inner groove ring. A limiting sleeve (16) located on the corresponding adjusting rod (12) is also sleeved between the frame (8) and the adjusting handle 2, and the limiting sleeve (16) is used to limit the lateral adjustment of the sleeve (11).

10. The self-anchored soil layer auxiliary drilling protection device according to claim 1, characterized in that: Support feet (9) are respectively fixedly connected to the four corners of the bottom surface of the frame (8), and the bottoms of the support feet (9) extend into the ground.

Images