Electric power iron tower foundation pile drilling equipment and construction method thereof

Abstract

The invention relates to a foundation engineering construction technology, and discloses electric iron tower foundation pile drilling equipment and a construction method thereof. The electric iron tower foundation pile drilling equipment comprises a drilling machine base, a portal frame, a power head, a plurality of drill rods and drill bits which are detachably connected. The portal frame can comprise a cross beam and two vertical rods, the cross beam is installed between the two vertical rods in a sliding mode, the sliding direction of the cross beam is parallel to the length direction of the vertical rods, the bottoms of the two vertical rods are horizontally and slidably connected with the drilling machine base, the power head is fixedly installed on the cross beam, and the uppermost drilling rod is in transmission connection with the power head. The adjacent drill rods are detachably connected end to end, and the drill bit is fixedly installed at the bottom end of the lowermost drill rod. The bottom of the vertical rod of the portal frame is designed to be in horizontal sliding connection with the drilling machine base, so that the power head, the drill rod and the drill bit can be easily driven to horizontally move to avoid the position over a pile hole during pulling-out and slag removal. The probability that soil residues fall around a pile hole opening is effectively reduced, and the situation that the soil residues fall into the pile hole again is reduced.

Description

Technical Field

[0001] The present invention relates to the technology of foundation engineering construction, and particularly to a drilling device for the foundation pile of a power transmission tower and its construction method. Background Art

[0002] In the current process of power infrastructure construction, the scale of large-scale transmission line projects is continuously expanding. As a key supporting structure of the transmission line, the construction quality and efficiency of the foundation pile of the power transmission tower are crucial. However, the current construction technology faces many severe challenges.

[0003] During the drilling construction process of the foundation pile hole, the existing drilling equipment has serious defects in the soil discharge and slag cleaning link. After the drill is lifted, the drill bit (spiral blade) is usually directly above the orifice of the drilled foundation pile hole and in the middle position of the equipment base. At this time, when clearing the soil slag accumulated on the spiral blade, the soil slag will directly fall around the orifice of the foundation pile hole and on the equipment base. The construction site environment is already complex, and it is extremely difficult to further transport and remove these fallen soil slags, which not only increases the additional cleaning cost but also consumes a lot of time. Even worse, some of the fallen soil slags will fall back into the drilled foundation pile hole again, resulting in the need for construction workers to repeatedly perform drilling and discharging operations. This not only greatly reduces the construction efficiency, prolongs the project cycle, and increases the project cost, but also may damage the pile hole wall due to repeated drilling and discharging, affecting the stability and bearing capacity of the pile hole and threatening the subsequent safe use of the power transmission tower.

[0004] Therefore, a technical means is needed to reduce the repetitive labor of slag discharge during drilling. Summary of the Invention

[0005] The technical problem to be solved by the present invention is: how to reduce the repetitive labor of slag discharge during drilling.

[0006] To solve the above technical problem, the present invention provides a drilling device for the foundation pile of a power transmission tower and its construction method.

[0007] In the first aspect of the present invention, a drilling device for the foundation pile of a power transmission tower is provided, which includes a detachable drill rig base, a gantry, a power head, a plurality of drill pipes and a drill bit; the gantry includes a cross beam and two vertical columns, the cross beam is slidably installed between the two vertical columns, the sliding direction of the cross beam is parallel to the length direction of the vertical columns, the bottoms of the two vertical columns are horizontally slidably connected to the drill rig base, the power head is fixedly installed on the cross beam, the uppermost drill pipe is drivingly connected to the power head, the adjacent drill pipes are detachably connected end to end, and the drill bit is fixedly installed at the bottom end of the lowermost drill pipe.

[0008] In one embodiment, the drill bit includes a drill bit body and a spiral blade, the lowermost end of the drill bit body is used for centering, the upper end of the drill bit body is coaxially fixedly connected to the spiral blade, and alloy teeth are provided on the lower edges of both the drill bit body and the spiral blade.

[0009] In one embodiment, the spiral blade includes a main spiral blade and a secondary spiral blade. The main spiral blade and the secondary spiral blade are arranged at intervals along the axial direction of the drill bit, and the extension length of the secondary spiral blade along the axial direction of the drill bit is less than that of the main spiral blade along the axial direction of the drill bit.

[0010] In one embodiment, a plurality of vertically extending rib plates are connected to the outer edges of the main spiral blade and the secondary spiral blade, and an included angle is formed between the side wall of the rib plate and the tangent where the rib plate is located.

[0011] In one embodiment, an inclination sensor is provided inside the drill bit body.

[0012] In one embodiment, the power transmission tower foundation pile drilling equipment further includes a clamping plate. The clamping plate includes a U-shaped opening. The gantry also includes a bottom beam, and the bottom beam is detachably connected to the two vertical rods respectively. A radial protrusion is provided at the upper end of the drill pipe, and the opening width of the U-shaped opening is between the diameter of the radial protrusion and the diameter of the drill pipe.

[0013] In one embodiment, the power transmission tower foundation pile drilling equipment further includes a friction ground anchor. An inner bearing plate is provided inside the drill rig base, and the inner bearing plate is fixedly connected to the drill rig base. The top of the friction ground anchor is detachably connected to the inner bearing plate, and the bottom of the friction ground anchor is embedded in the soil layer.

[0014] In one embodiment, the power transmission tower foundation pile drilling equipment further includes a hard rock ground anchor. An outer bearing plate is provided outside the drill rig base, and the outer bearing plate is fixedly connected to the drill rig base. The hard rock ground anchor is detachably connected to the outer bearing plate; the hard rock ground anchor includes a threaded sleeve, a lifting screw, a pin and two support plates. The threaded sleeve is in threaded cooperation with the lifting screw, the bottom end of the lifting screw extends out of the threaded sleeve, a horizontal through hole is provided at the bottom end of the lifting screw, the outer side surface of the support plate is arc-shaped, two parallel and opposite side wing plates are provided in the middle of the inner side surface of the support plate, and both ends of the pin extend out of the horizontal through hole and are respectively hinged to the two side wing plates.

[0015] In one embodiment, an inward chamfer is provided at the lower edge of the threaded sleeve, an outward chamfer adapted to the inward chamfer is provided at the upper edge of the inner side surface of the support plate, the top end of the lifting screw extends out of the threaded sleeve, and a torsion ring is provided at the top end of the lifting screw.

[0016] The second aspect of the present invention provides a construction method, which is used for the power tower foundation pile drilling equipment provided by the first aspect of the present invention, and the construction method includes: assembling a drilling rig base, a gantry, a power head, a plurality of drill rods and a drill bit; starting the power head, and the power head drives the drill rod and the drill bit to rotate; controlling the crossbeam of the gantry to slide downward on the vertical pole of the gantry to drill pile holes; stopping the power head, controlling the crossbeam to slide upward on the vertical pole, and lifting the drill rod and the drill bit upward; disassembling the plurality of drill rods in sequence from top to bottom; controlling the vertical pole to slide horizontally on the drilling rig base, and driving the power head, the last section of the drill rod and the drill bit to avoid the location of the pile hole in the horizontal direction.

[0017] Compared with the prior art, the power tower foundation pile drilling device and the construction method thereof according to the embodiment of the present invention have the following beneficial effects:

[0018] By designing the bottom of the gantry's vertical pole and the drilling rig base to be connected in a horizontal sliding manner, the power head, drill rod and drill bit can be easily driven to move horizontally when drilling and clearing slag, so that they are away from the top of the pile hole. This design effectively reduces the probability of soil debris falling around the pile hole and on the equipment base when clearing soil debris, and reduces the situation of soil debris falling back into the pile hole. There is no need to drill and remove it repeatedly, which greatly reduces the repetitive labor of removing slag during drilling, shortens the project cycle, and reduces the cost of manpower and material resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of a power tower foundation pile drilling device exemplarily shown in an embodiment of the present invention.

[0020] Figure 2 It is a structural schematic diagram of another state of a power tower foundation pile drilling device exemplarily shown in an embodiment of the present invention.

[0021] Figure 3 It is a structural schematic diagram of another state of a power tower foundation pile drilling device exemplarily shown in an embodiment of the present invention.

[0022] Figure 4 The present invention is a schematic diagram of the structure of a drill bit of a power tower foundation pile drilling device exemplarily shown in an embodiment of the present invention.

[0023] Figure 5 The figure is a schematic diagram of the internal structure of a drill bit of a power tower foundation pile drilling device exemplarily shown in an embodiment of the present invention.

[0024] Figure 6 It is a schematic structural diagram of a hard rock anchor of a power tower foundation pile drilling device exemplarily shown in an embodiment of the present invention.

[0025] Figure 7It is a schematic internal structure diagram of a hard rock ground anchor of a drilling device for a power transmission tower foundation pile according to an exemplary embodiment of the present invention.

[0026] Figure 8 It is another schematic structure diagram of a hard rock ground anchor of a drilling device for a power transmission tower foundation pile according to an exemplary embodiment of the present invention.

[0027] Figure 9 It is a schematic flow diagram of a construction method of a drilling device for a power transmission tower foundation pile according to an exemplary embodiment of the present invention.

[0028] Reference numerals:

[0029] 1. Drilling device for power transmission tower foundation pile; 11. Drilling rig base; 12. Gantry; 13. Power head; 14. Drill pipe; 15. Drill bit; 16. Clamping plate; 17. Friction ground anchor; 18. Inner bearing plate; 19. Hard rock ground anchor; 20. Outer bearing plate; 121. Cross beam; 122. Vertical pole; 123. Bottom beam; 141. Radial protrusion; 151. Drill bit body; 152. Spiral blade; 153. Alloy tooth; 154. Inclination sensor; 161. U-shaped opening; 191. Threaded sleeve; 192. Lifting screw; 193. Pin; 194. Support plate; 195. Compression spring; 1521. Main spiral blade; 1522. Secondary spiral blade; 1523. Rib plate; 1921. Inner chamfer; 1922. Torsion ring; 1941. Flank plate; 1942. Outer chamfer. Detailed implementation manners

[0030] The following will further describe in detail the specific implementation manners of the present invention in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0031] In the current process of power infrastructure construction, the scale of large-scale transmission line projects is continuously expanding. As a key support structure for transmission lines, the construction quality and efficiency of the foundation piles of power transmission towers are crucial. However, the current construction technologies are facing many severe challenges.

[0032] During the drilling construction of foundation pile holes, the existing drilling equipment has serious defects in the soil removal and slag removal process. After drilling, the drill bit (spiral blade) is usually located directly above the hole of the drilled foundation pile and in the middle of the equipment base. At this time, when the soil debris accumulated on the spiral blade is removed, the soil debris will fall directly around the hole of the foundation pile and on the base of the equipment. The environment of the construction site is already complex, and it is extremely difficult to further transport and remove these fallen soil debris, which not only increases the additional cleaning cost, but also takes a lot of time. What's worse, some of the fallen soil debris will fall back into the drilled foundation pile hole, causing the construction workers to repeatedly perform drilling and rowing operations. This not only greatly reduces the construction efficiency, prolongs the project cycle, and increases the project cost, but may also damage the pile hole wall due to repeated drilling and rowing, affecting the stability and bearing capacity of the pile hole, and threatening the subsequent safe use of the power tower.

[0033] Based on this, Figures 1-3 As shown, a power tower foundation pile drilling device according to a preferred embodiment of the present invention may include a detachably connected drilling rig base 11, a gantry 12, a power head 13, a plurality of drill rods 14 and a drill bit 15.

[0034] The gantry 12 may include a crossbeam 121 and two vertical poles 122. The crossbeam 121 is slidably installed between the two vertical poles 122. The sliding direction of the crossbeam 121 is parallel to the length direction of the vertical poles 122. The bottoms of the two vertical poles 122 are horizontally slidably connected to the drilling rig base 11. The power head 13 is fixedly installed on the crossbeam 121. The uppermost drill rod 14 is transmission-connected to the power head 13. The adjacent drill rods 14 are detachably connected head to tail. The drill bit 15 is fixedly installed at the bottom end of the lowermost drill rod 14.

[0035] Since the bottoms of the two vertical poles 122 of the gantry 12 are horizontally slidably connected to the drilling rig base 11, when it is necessary to clean the soil debris on the spiral blades 152 of the drill bit 15, the gantry 12 can be pushed to slide horizontally as a whole, driving the power head 13, the drill rod 14 and the drill bit 15 away from the top of the foundation pile hole. In this way, when removing soil debris, the soil debris will not fall around the pile hole and on the base of the equipment, reducing the situation of soil debris falling back into the pile hole, and there is no need for repeated drilling. Compared with traditional equipment, the construction efficiency is greatly improved, and a lot of time originally spent on cleaning soil debris and repeated drilling is saved, effectively shortening the project cycle.

[0036] Moreover, the equipment adopts a detachable component design. During transportation, components such as the drill rig base 11, gantry 12, power head 13, drill pipe 14, and drill bit 15 can be disassembled into multiple parts. This enables the equipment to adapt to various complex transportation conditions, especially in construction sites with complex terrains and inconvenient transportation, solving the problem of difficult transportation of large equipment to the site. After arriving at the construction site, the components can be conveniently assembled and quickly put into use, reducing the installation and commissioning time of the equipment and further improving the construction efficiency.

[0037] The situation of repeated drilling and discharging caused by the re-falling of soil residues into the pile hole is reduced, and essentially, the damage to the pile hole wall is also reduced.

[0038] It can be understood that the sliding connection in any direction in this application can adopt the following structures: common sliding connection structures include guide rails and sliders, dovetail grooves, T-shaped grooves, sleeve sliding columns, and linear bearings.

[0039] Based on this, in order to improve the drilling quality and efficiency, in an embodiment of the present invention, the drill bit 15 may include a drill bit body 151 and a spiral blade 152. The lowermost end of the drill bit body 151 is used for centering. The upper end of the drill bit body 151 is fixedly connected coaxially with the spiral blade 152. Alloy teeth 153 are provided on the lower edges of both the drill bit body 151 and the spiral blade 152.

[0040] Exemplarily, the alloy teeth 153 can adopt the following alloy materials: cemented carbide (with tungsten carbide (WC) as the hard phase and metals such as cobalt (Co) as the binder phase, made by powder metallurgy process), high-speed steel alloy (containing alloy elements such as tungsten (W), molybdenum (Mo), chromium (Cr), vanadium (V)), cermet alloy (composed of metal and ceramic phases), polycrystalline diamond compact (PDC) alloy (composed of a polycrystalline diamond layer and a cemented carbide matrix), nickel-based alloy (with nickel as the matrix and adding alloy elements such as chromium (Cr), molybdenum (Mo), niobium (Nb), having good high-temperature strength and corrosion resistance), cobalt-based alloy (with cobalt as the matrix and adding elements such as chromium (Cr), tungsten (W), carbon (C), having high hardness, high wear resistance, and good high-temperature performance).

[0041] In one embodiment, as Figure 4 and Figure 5 shown, the spiral blade 152 may include a main spiral blade 1521 and a secondary spiral blade 1522. The main spiral blade 1521 and the secondary spiral blade 1522 are arranged at intervals along the axial direction of the drill bit 15, and the axial extension length of the secondary spiral blade 1522 along the axial direction of the drill bit 15 is less than the axial extension length of the main spiral blade 1521 along the axial direction of the drill bit 15.

[0042] The main helical blade 1521 and the auxiliary helical blade 1522 are arranged at intervals along the axis of the drill bit 15. During the drilling process, the main helical blade 1521 is mainly responsible for transporting a large amount of broken rock and soil upward. The auxiliary helical blade 1522 plays an auxiliary role in discharging the slag. When the main helical blade 1521 is transporting the rock and soil, some of the rock and soil may slip through the gaps of the main helical blade 1521. At this time, the auxiliary helical blade 1522 can catch it in time and continue to transport it upward, reducing the accumulation of rock and soil in the hole. This collaborative working method makes the slag discharge smoother and more efficient, reduces the jamming phenomenon of the drill bit 15 caused by poor slag discharge, and thus improves the drilling efficiency. Compared with the single helical blade 152 structure, the main and auxiliary helical blade 1522 structure can reduce the resistance suffered by the drill bit 15 during drilling and reduce the power consumption.

[0043] The spaced arrangement and length difference between the main helical blade 1521 and the auxiliary helical blade 1522 make the force on the drill bit 15 more uniform during drilling. When rotating, the main and auxiliary helical blades 1522 cooperate with each other, which can better control the drilling direction of the drill bit 15 and reduce the shaking and deviation of the drill bit 15. Especially when encountering a formation with uneven geological conditions, this structure can effectively reduce the drilling inclination problem of the drill bit 15 caused by uneven local force, ensure the verticality of the drill hole and the uniformity of the hole diameter, and improve the drilling quality.

[0044] When the rock and soil slips from the gap of the main helical blade 1521 to the auxiliary helical blade 1522, the rotation of the auxiliary helical blade 1522 will exert an additional force on the rock and soil, making it further broken and refined. The finer rock and soil are easier to be discharged out of the hole, and at the same time, the hole wall becomes smoother and flatter, reducing the risk of hole wall collapse and further improving the drilling quality.

[0045] In one embodiment, a number of vertically extending rib plates 1523 are connected to the outer edges of the main helical blade 1521 and the auxiliary helical blade 1522, and the side wall of the rib plate 1523 has an angle with the tangent where the rib plate 1523 is located.

[0046] The rib plate 1523 is connected between the vertically adjacent main helical blade 1521 and the auxiliary helical blade 1522, effectively improving the strength and stiffness of the helical blade 152 and reducing the probability of deformation and damage of the helical blade 152 during drilling use.

[0047] Moreover, the rib plate 1523 can also play a guiding and pushing role on the rock and soil. Since its side wall has an angle with the tangent, it can change the movement trajectory of the rock and soil, making the rock and soil rise more smoothly along the helical blade 152, improving the slag discharge efficiency and reducing the sediment in the hole.

[0048] In addition to improving the strength of the helical blade 152, the rib plate 1523 can also effectively squeeze the hole wall of the drilled hole, making the inner wall compact and having better hole formation performance.

[0049] In one embodiment, an inclination sensor 154 is provided inside the drill bit body 151. By accurately monitoring the inclination angle of the drill bit 15, potential construction problems can be detected in a timely manner, reducing subsequent construction difficulties and quality hazards caused by drill hole inclination, and improving the accuracy and reliability of the entire construction of the power tower foundation pile.

[0050] In addition to using the traditional method to disassemble the drill pipe 14, in another embodiment of the present invention, the power tower foundation pile drilling equipment may further include a clamping plate 16. The clamping plate 16 may include a U-shaped opening 161. The gantry 12 may further include a bottom beam 123. The bottom beam 123 is detachably connected to the two vertical rods 122 respectively. A radial protrusion 141 is provided at the upper end of the drill pipe 14. The opening width of the U-shaped opening 161 is between the diameter of the radial protrusion 141 and the diameter of the drill pipe 14. Since the diameter of the drill pipe 14 is smaller than the opening width of the U-shaped opening 161, the drill pipe 14 can be placed in the U-shaped opening 161. At the same time, since the diameter of the radial protrusion 141 is larger than the opening width of the U-shaped opening 161, when the radial protrusion 141 is located above the U-shaped opening 161, the U-shaped opening 161 can play a fixing role in the vertical direction for the drill pipe 14.

[0051] When installing the drill pipe 14, the drill pipe 14 can be passed through the U-shaped opening 161, and the radial protrusion 141 is stuck on the clamping plate 16 to achieve the rapid positioning and fixing of the drill pipe 14.

[0052] The clamping plate 16 is used to clamp and support the top of the next section of the drill pipe 14 at the lower end during drilling, so as to keep the drill pipe 14 and the drill bit 15 in the hole stable. By sequentially disassembling the drill pipe 14 between the clamping plate 16 and the power head 13 until the drill bit 15 with the spiral blade 152 is lifted out of the foundation pile hole opening.

[0053] Specifically, when a certain section of the drill pipe 14 is clamped by the clamping plate 16, the clamping plate 16 is placed on the bottom beam 123, and the clamped drill pipe 14 and the other drill pipes 14 and the drill bit 15 below can be supported by the bottom beam 123. The drill pipe 14 above the clamped drill pipe 14 (that is, the drill pipe 14 between the clamped drill pipe 14 and the power head 13) is in an unloaded state. Therefore, it can be disassembled, and each drill pipe 14 can be disassembled by repeating the operation in sequence until the drill bit 15 is lifted out of the bottom surface.

[0054] Using this structure for the disassembly and assembly of the drill pipe 14, no additional hoisting equipment is required, greatly saving costs and facilitating on-site construction.

[0055] Exemplarily, Figure 1 、 Figure 2 and Figure 3 respectively correspond to three states of the drilling equipment during drilling, when the drill bit 15 is lifted out of the ground, and when the drill bit 15 deviates from the pile hole.

[0056] In one embodiment, the power tower foundation pile drilling equipment may further include a friction ground anchor 17. An inner pressure plate 18 is provided inside the drilling rig base 11. The inner pressure plate 18 is fixedly connected to the drilling rig base 11. The top of the friction ground anchor 17 is detachably connected to the inner pressure plate 18, and the bottom of the friction ground anchor 17 is embedded in the soil layer.

[0057] After the friction anchor 17 is embedded in the soil layer, the friction between the soil layer and the anchor is used to provide a stable support for the drilling rig base 11. During the drilling process, the vibration and impact force generated by the equipment can be effectively resisted, the displacement and shaking of the equipment can be reduced, and the smooth drilling operation can be ensured.

[0058] In addition to the commonly used friction anchor 17, another embodiment of the present invention provides an innovative hard rock anchor 19 for rock formations.

[0059] Specifically, the power tower foundation pile drilling equipment can also include a hard rock anchor 19. An external pressure plate 20 is provided on the outside of the drilling rig base 11. The external pressure plate 20 is fixedly connected to the drilling rig base 11, and the hard rock anchor 19 and the external pressure plate 20 are detachably connected.

[0060] like Figures 6-8 As shown, the hard rock anchor 19 may include a threaded sleeve 191, a lifting screw 192, a pin 193 and two support plates 194. The threaded sleeve 191 is threadedly matched with the lifting screw 192. The bottom end of the lifting screw 192 extends out of the threaded sleeve 191. A horizontal through hole is provided at the bottom end of the lifting screw 192. The outer side surface of the support plate 194 is arc-shaped. Two parallel side wing plates 1941 are provided in the middle of the inner side surface of the support plate 194. Both ends of the pin 193 extend out of the horizontal through hole. Both ends of the pin 193 are hinged to the two side wing plates 1941 respectively.

[0061] Under hard rock geological conditions, the friction anchor 17 may not provide sufficient support. The hard rock anchor 19 can provide greater anchoring force through the contact and compression between the support plate 194 and the hard rock, ensuring the stability of the equipment in the hard rock area and enabling the drilling operation to proceed smoothly.

[0062] Specifically, when anchoring is required, the lifting screw 192 rotates upward, driving the two support plates 194 to contact the bottom of the threaded sleeve 191. The force generated by the contact causes the upper parts of the two support plates 194 to rotate and open compared to the horizontal through hole, forming a fixing effect on the anchor hole.

[0063] Moreover, in a further embodiment, the lower edge of the threaded sleeve 191 is provided with an inward chamfer 1921, the upper edge of the inner side surface of the support plate 194 is provided with an outward chamfer 1942 adapted to the inward chamfer 1921, the top end of the lifting screw 192 extends out of the threaded sleeve 191, and the top end of the lifting screw 192 is provided with a torque ring 1922.

[0064] The combined design of the inward chamfer 1921 and the outward chamfer 1942 enables the support plate 194 to open and contract smoothly along a specific trajectory more easily when the lifting screw 192 rotates. When the lifting screw 192 moves downward, the support plate 194 can smoothly open outward and closely contact the hard rock; when the lifting screw 192 moves upward, the support plate 194 can contract smoothly, facilitating the disassembly and movement of the hard rock anchor 19.

[0065] Based on this, the torque ring 1922 at the top of the lifting screw 192 provides a convenient force application point for the operator. By rotating the torque ring 1922 using a tool, the rotation of the lifting screw 192 can be easily controlled, thereby adjusting the position of the support plate 194 and the magnitude of the anchoring force, improving the convenience and efficiency of the operation.

[0066] This structural design ensures the close contact and uniform force distribution between the support plate 194 and the hard rock, improving the anchoring reliability of the hard rock anchor 19. During the drilling process, it can better resist the vibration and impact force of the equipment, ensuring the stable operation of the equipment.

[0067] In the present invention, as Figure 6 shown, a compression spring 195 can specifically be arranged between the lower parts of the two support plates 194 to ensure that during the process of lifting the hard rock anchor 19, the upper parts of the two support plates 194 will not open freely and affect the lifting of the hard rock anchor 19.

[0068] Correspondingly, on the other hand, in the present invention, as Figure 9 shown, a construction method is provided. The construction method is used for the power tower foundation pile drilling equipment provided in any embodiment of the present invention. The construction method may include:

[0069] S101. Assemble the drilling rig base 11, the gantry 12, the power head 13, a plurality of drill pipes 14, and the drill bit 15.

[0070] S102. Start the power head 13, and the power head 13 drives the drill pipe 14 and the drill bit 15 to rotate.

[0071] S103. Control the cross beam 121 of the gantry 12 to slide downward on the vertical rod 122 of the gantry 12 to drill the pile hole.

[0072] S104. Stop the power head 13, control the cross beam 121 to slide upward on the vertical rod 122, and lift the drill pipe 14 and the drill bit 15 upward.

[0073] S105. Disassemble a plurality of drill pipes 14 sequentially from top to bottom.

[0074] S106. Control the vertical rod 122 to slide horizontally on the drill rig base 11, driving the power head 13, the last drill pipe 14 and the drill bit 15 to avoid the position of the pile hole horizontally.

[0075] The structural embodiments of the power tower foundation pile drilling equipment described in this application and their corresponding beneficial effects are equally applicable to the construction method embodiments involved in this application. The equipment structure and the construction method are closely related and complement each other. The unique structure of the equipment is the basis for realizing an efficient construction method, and the implementation of the construction method depends on the characteristics and functions of the equipment structure.

[0076] In view of the consistency in principle and function implementation between the equipment structure embodiments and the method embodiments, to avoid repeated description, the description of the structure embodiments and their beneficial effects in this application is equally applicable to the construction method embodiments.

[0077] In one embodiment, when using the clamping plate 16, the steps of S105, successively disassembling several drill pipes 14 from top to bottom may include: clamping the second drill pipe 14 from top to bottom by the clamping plate 16, disassembling the first drill pipe 14, controlling the cross beam 121 to slide upward on the vertical rod 122, and lifting the drill pipe 14 and the drill bit 15 upward. Repeat the operation until the drill bit 15 is lifted out of the ground.

[0078] Compared with the prior art, the beneficial effects of the power tower foundation pile drilling equipment and its construction method in the embodiments of the present invention are as follows:

[0079] By designing the bottom of the vertical rod 122 of the gantry 12 to be horizontally slidably connected to the drill rig base 11, during drill lifting and slag cleaning, it can easily drive the power head 13, the drill pipe 14 and the drill bit 15 to move horizontally, so that they avoid directly above the pile hole. This design effectively reduces the probability that the soil slag falls around the pile hole opening and on the equipment base during soil slag removal, reduces the situation where the soil slag re-falls into the pile hole, eliminates the need for repeated drilling and discharging, greatly reduces the repetitive labor of discharging slag during drilling, shortens the project cycle, and reduces the labor and material costs.

[0080] In the description of the present invention, it should be understood that in the present invention, "main" and "sub" are mainly used to distinguish parts with different functions or status in the same type of components. Taking the spiral blade as an example, "the spiral blade includes a main spiral blade and a sub spiral blade", where the "main spiral blade" undertakes the main functions of breaking soil and discharging slag during drilling operations. Its structural design and parameter settings are to meet the main working requirements and usually dominate in terms of size, strength or function implementation. The "sub spiral blade" is a component that assists the "main spiral blade" in working. It cooperates with the main spiral blade to jointly optimize the soil breaking and slag discharging effects during the drilling process. Although the sub spiral blade plays an auxiliary role in function, it is of great significance for improving the overall drilling efficiency and quality. The two work together to improve the practicality and reliability of the invention.

[0081] When describing the equipment structure in the present invention, "inside" usually refers to the spatial range or positional relationship inside the equipment or component itself. For example, when referring to the drill bit body, if it is described that "an inclination sensor is provided inside the drill bit body", the "inside" here refers to the internal space surrounded by the drill bit body itself, which is used to install the inclination sensor to realize the drilling path monitoring function. "Outside" is opposite to "inside", and refers to the outer area or surface of the equipment or component away from the internal space. For example, when describing the threaded sleeve of a hard rock anchor, "an external thread is provided on the upper part of the outer side surface of the threaded sleeve", and the "outside" here refers to the outer surface part of the threaded sleeve away from its internal accommodation space, and the external thread is used to cooperate with other components to realize the anchoring effect.

[0082] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A drilling device for the foundation pile of a power transmission tower, characterized in that, It includes a drill rig base (11), a gantry (12), a power head (13), a number of drill pipes (14) and a drill bit (15) which are detachably connected; The gantry (12) includes a cross beam (121) and two vertical columns (122). The cross beam (121) is slidably installed between the two vertical columns (122). The sliding direction of the cross beam (121) is parallel to the length direction of the vertical columns (122). The bottoms of the two vertical columns (122) are horizontally slidably connected to the drill rig base (11). The power head (13) is fixedly installed on the cross beam (121). The uppermost drill pipe (14) is drivingly connected to the power head (13). The adjacent drill pipes (14) are detachably connected end to end. The drill bit (15) is fixedly installed at the bottom end of the lowermost drill pipe (14).

2. The drilling equipment for the foundation pile of the power transmission tower according to claim 1, wherein, The drill bit (15) includes a drill bit body (151) and a spiral blade (152). The lowermost end of the drill bit body (151) is used for centering. The upper end of the drill bit body (151) is coaxially and fixedly connected to the spiral blade (152). Alloy teeth (153) are provided on the lower edges of both the drill bit body (151) and the spiral blade (152).

3. The drilling equipment for the foundation pile of the power transmission tower according to claim 2, wherein, The spiral blade (152) includes a main spiral blade (1521) and a secondary spiral blade (1522). The main spiral blade (1521) and the secondary spiral blade (1522) are arranged at intervals along the axial direction of the drill bit (15), and the extension length of the secondary spiral blade (1522) along the axial direction of the drill bit (15) is less than the extension length of the main spiral blade (1521) along the axial direction of the drill bit (15).

4. The drilling equipment for the foundation pile of the power transmission tower according to claim 3, characterized in that, A number of vertically extending rib plates (1523) are connected to the outer edges of the main spiral blade (1521) and the secondary spiral blade (1522). The side wall of the rib plate (1523) has an angle with the tangent where the rib plate (1523) is located.

5. The drilling equipment for the foundation pile of the power transmission tower according to claim 2, characterized in that, An inclination sensor (154) is provided inside the drill bit body (151).

6. The drilling equipment for the foundation pile of the power transmission tower according to claim 1, characterized in that, The electric power tower foundation pile drilling equipment (1) further includes a clamping plate (16). The clamping plate (16) includes a U-shaped opening (161). The gantry (12) further includes a bottom beam (123). The bottom beam (123) is detachably connected to the two vertical columns (122) respectively. A radial protrusion (141) is provided at the upper end of the drill pipe (14). The opening width of the U-shaped opening (161) is between the diameter of the radial protrusion (141) and the diameter of the drill pipe (14).

7. The drilling equipment for the foundation pile of the power transmission tower according to claim 1, characterized in that The electric power tower foundation pile drilling equipment (1) further includes a friction ground anchor (17). An inner bearing plate (18) is provided inside the drill rig base (11). The inner bearing plate (18) is fixedly connected to the drill rig base (11). The top of the friction ground anchor (17) is detachably connected to the inner bearing plate (18). The bottom of the friction ground anchor (17) is embedded in the soil layer.

8. The drilling equipment for the foundation pile of the power transmission tower according to claim 7, characterized in that, The power transmission tower foundation pile drilling equipment (1) further includes a hard rock ground anchor (19). An outer bearing plate (20) is provided outside the drilling rig base (11). The outer bearing plate (20) is fixedly connected to the drilling rig base (11), and the hard rock ground anchor (19) is detachably connected to the outer bearing plate (20). The hard rock ground anchor (19) includes a threaded sleeve (191), a lifting screw (192), a pin (193), and two support plates (194). The threaded sleeve (191) is in threaded cooperation with the lifting screw (192). The bottom end of the lifting screw (192) extends out of the threaded sleeve (191). A horizontal through hole is provided at the bottom end of the lifting screw (192). The outer side surface of the support plate (194) is arc-shaped. Two parallel and facing side wing plates (1941) are provided in the middle of the inner side surface of the support plate (194). The two ends of the pin (193) extend out of the horizontal through hole, and the two ends of the pin (193) are respectively hinged to the two side wing plates (1941).

9. The drilling equipment for the foundation pile of the power transmission tower according to claim 8, characterized in that, An inward chamfer (1921) is provided at the lower edge of the threaded sleeve (191). An outward chamfer (1942) adapted to the inward chamfer (1921) is provided at the upper edge of the inner side surface of the support plate (194). The top end of the lifting screw (192) extends out of the threaded sleeve (191), and a torsion ring (1922) is provided at the top end of the lifting screw (192).

10. A construction method, characterized in that, The construction method is used for the power transmission tower foundation pile drilling equipment (1) according to any one of claims 1-9. The construction method includes: Assembling the drilling rig base (11), the gantry (12), the power head (13), a plurality of drill pipes (14), and the drill bit (15); Starting the power head (13), and the power head (13) drives the drill pipe (14) and the drill bit (15) to rotate; Controlling the cross beam (121) of the gantry (12) to slide downward on the vertical rod (122) of the gantry (12) to drill a pile hole; Stopping the power head (13), controlling the cross beam (121) to slide upward on the vertical rod (122), and lifting the drill pipe (14) and the drill bit (15) upward; Sequentially disassembling a plurality of the drill pipes (14) from top to bottom; Controlling the vertical rod (122) to slide horizontally on the drilling rig base (11), and driving the power head (13), the last section of the drill pipe (14), and the drill bit (15) to avoid the position of the pile hole in the horizontal direction.

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