Modular micro-pile drilling device based on water counterweight and construction method

Abstract

The application discloses a modular micro pile drilling device based on water counterweight and a construction method, which comprises a bottom frame and a drill head frame above the bottom frame. The inside of the bottom frame and the inside of the drill head frame can be respectively filled with water. The side of the bottom frame is detachably connected with a water-filled counterweight. The bottom of the drill head frame is connected with the bottom frame through a transition connecting frame. The front part of the drill head frame is connected with a sliding plate through sliding. The sliding plate is connected with a drill head assembly. The drill head frame is detachably connected with the extension end of a supporting telescopic rod through sliding. The fixed end of the supporting telescopic rod is detachably connected with the bottom frame through hinging. The drill head frame is pushed by the supporting telescopic rod to adjust the included angle between the central axis of the drill head assembly and the ground. When the ground hole is different, the angle detection sensor is used to detect the angle, and the supporting telescopic rod is used to adjust the angle of the drill head shaft relative to the ground in real time. Compared with the prior art, the technical scheme has the advantages of light weight, modularization and rapid assembly, and can be used for mountain ground hole excavation.

Description

Technical Field

[0001] This invention relates to the field of micropile construction technology, and in particular to a modular micropile drilling device and construction method based on water counterweight. Background Technology

[0002] To construct power transmission towers in mountainous areas, a foundation structure needs to be pre-installed in the target mountainous region. However, due to the significant elevation differences and inconvenient transportation in mountainous areas, it is generally carried out by manpower or animal power. During the construction of the foundation structure, corresponding ground holes are excavated, micropillars are placed inside the ground holes, and concrete is poured to ultimately form micropiles.

[0003] Regarding the installation method of micropiles, micropiles can be installed vertically or inclined. Inclined micropiles, by forming an angle with the ground and increasing the contact area with the soil, can improve the anchoring ability of micropiles to the ground.

[0004] To address the challenge of drilling inclined ground surfaces, current technologies typically employ transport vehicles equipped with drilling devices. These vehicles are used to tilt the drilling devices to the appropriate angle for excavation. However, unpaved mountain roads present complex conditions, and heavy-duty transport vehicles equipped with drilling devices often have poor maneuverability in such terrain. Therefore, optimizing the design of existing micro-pile excavation devices with lightweight and modular designs is highly significant for operators to easily excavate vertical or inclined ground surfaces in complex environments. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is that heavy transport vehicles equipped with drilling devices have poor passability when facing complex terrain.

[0006] The above-mentioned technical problems are solved by the following technical solution: The present invention proposes a modular micro-pile drilling device based on water counterweight, with a bottom frame and an internal cavity that can be filled with water. The drill bit frame has an internal cavity that can be filled with water, and the bottom of the drill bit frame is flipped and connected to the bottom frame through a transition connecting frame. The drill bit assembly is connected to the front of the drill bit frame via a sliding plate; The support assembly includes a support telescopic rod, the fixed end of which is detachably hinged to the bottom frame, and the telescopic end of which is detachably connected to the drill bit frame; wherein, By controlling the extension and retraction of the support telescopic rod, the drill bit frame is flipped to adjust the angle between the central axis of the drill bit assembly and the ground.

[0007] In a preferred embodiment of the modular micropile drilling device based on water counterweight of the present invention: a middle rod is provided in the middle of the bottom frame, a middle connecting frame is provided on the surface of the middle rod, the middle connecting frame is detachably connected to the transition connecting frame, and the rear part of the transition connecting frame is pivotally connected to the rear part of the drill bit frame.

[0008] In a preferred embodiment of the modular micropile drilling device based on water counterweight of the present invention: an angle detection sensor is provided on the side of the mutual mating surface of the transition connecting frame and the drill bit frame to detect the angle change between the mating surfaces; the limiting push rod at the front of the transition connecting frame is fixedly connected to the limiting fixing block installed at the front of the drill bit frame.

[0009] In a preferred embodiment of the modular micropile drilling device based on water counterweight of the present invention: a linear slide rail is provided on the side of the drill bit frame, and the sliding plate is slidably connected to the linear slide rail; a hydraulic push-pull rod is provided on the top of the drill bit frame, and the telescopic end of the hydraulic push-pull rod is connected to the sliding plate; the sliding plate is fixedly connected to the motor through the motor bracket, and the rotation shaft of the motor is connected to the drill bit through the drill bit shaft.

[0010] In a preferred embodiment of the modular micropile drilling device based on water counterweight of the present invention: a drill bit rotation stabilization mechanism is provided below the front part of the sliding plate and the drill bit frame, the drill bit rotation stabilization mechanism includes a stabilizing telescopic push rod; both ends of the stabilizing telescopic push rod are respectively hinged to the rear part of the side connecting frame, the middle part of the side connecting frame is hinged to the drill bit shaft stabilizing plate, and the front part of the side connecting frame is fixedly connected to a shock-absorbing spring; the gap between the drill bit shaft stabilizing plate and the outer circumferential surface of the drill bit shaft is adjusted by adjusting the length of the stabilizing telescopic push rod.

[0011] In a preferred embodiment of the modular micropile drilling device based on water counterweight described in this invention: the inner side of the drill bit shaft stabilizing plate is provided with several rotatable rolling elements, and the rolling condition of the rolling elements and the outer circumference of the drill bit shaft is controlled by the actual working length of the stabilizing telescopic push rod and the elastic deformation of the shock-absorbing spring.

[0012] In a preferred embodiment of the modular micropile drilling device based on water counterweight of the present invention: the top surface of the bottom frame is provided with a first water injection hole, and the front surface of the side rod of the drill bit frame is provided with a second water injection hole; When the bottom frame and the drill bit frame are filled with water and the drill bit shaft is in the vertical drilling hole, the total weight of the motor, the motor bracket, the drill bit shaft, the drill bit, and the upper and lower drill bit rotation stabilization mechanisms is the first total weight; the total weight of the hydraulic push-pull rod, the drill bit frame, the sliding plate, the transition connecting frame, and the intermediate connecting frame is the second total weight; the total weight of the two support telescopic rods located at the rear and the support seat located at the rear of the bottom frame is the third total weight; the ratio of the first total weight, the second total weight, and the third total weight is 1:1:1.

[0013] In a preferred embodiment of the modular micropile drilling device based on water counterweight described in this invention: the bottom frame side can also be detachably connected with a counterweight for water injection.

[0014] In a preferred embodiment of the modular micropile drilling device based on water counterweight of the present invention: a support seat is provided at the rear of the bottom frame, a first anchoring point is provided on the back of the drill bit frame, and a second anchoring point is provided on the side of the support seat. The first anchoring point and the second anchoring point are connected by a return spring.

[0015] This invention also provides the following technical solution: a construction method, comprising a modular micropile drilling device based on water counterweight, including, The bottom frame is placed flat on the ground, the drill bit frame is placed on the bottom frame, and the drill bit frame and the bottom frame are connected by the transition connecting bracket so that the two can be flipped. The telescopic end of the support telescopic rod is slidably connected to the side groove rail provided on the side of the drill bit frame, and the tail end of the support telescopic rod is hinged to the rear of the bottom frame. The sliding plate, together with the drill bit assembly on which the drill bit is mounted, is slidably connected to the drill bit frame; when the sliding plate slides to a suitable position, it is fixedly connected to the hydraulic push-pull rod located at the top of the drill bit frame. Water is injected into the bottom frame and the drill bit frame; When drilling vertically, the support telescopic rod extends outward, flipping the entire drill bit frame forward. An angle detection sensor detects the angle between the bottom surface of the drill bit frame and the top surface of the transition connecting frame. If the angle is 0°, the support telescopic rod is controlled to be in a pressure-holding state, and the limit push rod extends upward and inserts into the limit fixing block for limiting. The drill bit assembly is driven to rotate, and the sliding plate is pushed downward by the hydraulic push-pull rod to drill a vertical hole in the ground. When drilling a hole at an angle, the support telescopic rod retracts, flipping the entire drill bit frame backward. The angle detection sensor detects the angle between the bottom surface of the drill bit frame and the top surface of the transition connecting frame in real time. If the angle is the required angle, the support telescopic rod is controlled to be in a pressure-holding state, driving the drill bit assembly to rotate. The hydraulic push-pull rod pushes the sliding plate to move downward at an angle, forming an inclined hole in the ground.

[0016] The beneficial effects of the present invention are as follows: the modular micro-pile drilling device based on water counterweight of the present invention can detect the angle through the angle detection sensor and adjust the angle of the drill bit shaft relative to the ground in real time through the support telescopic rod during the actual construction process. It also has the advantages of lightweight and modular rapid assembly, which can effectively cope with the excavation of mountainous ground and improve production efficiency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments of the present invention will be briefly described below. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention.

[0018] Figure 1 A three-dimensional structural schematic diagram of the modular micro-pile drilling device based on water counterweight of the present invention has been published.

[0019] Figure 2 City Figure 1 A magnified view of a portion of point A in the middle.

[0020] Figure 3 A top-view structural schematic diagram of the drill bit rotation stabilization mechanism of the present invention has been published.

[0021] Figure 4 Another three-dimensional structural schematic diagram of the modular micro-pile drilling device based on water counterweight of the present invention has been presented.

[0022] Figure 5 A schematic diagram of the lateral structure of the modular micro-pile drilling device based on water counterweight of the present invention has been published.

[0023] Figure 6 A three-dimensional structural schematic diagram of a modular micro-pile drilling device based on water counterweight, according to another embodiment of the present invention, is presented.

[0024] In the diagram: 1. Bottom frame; 101. Middle rod; 102. Tail rod; 103. Middle connecting frame; 104. Limiting push rod; 105. Support seat; 106. Connecting seat; 107. First water injection hole; 108. Second anchoring point; 109. Lower connecting slot; 2. Drill bit frame; 201. Side rod; 202. Top plate of drill bit frame; 203. Limiting fixing block; 204. Side groove rail; 205. Sliding stepped wheel; 206. Linear slide rail; 207. Second water injection hole; 208. Notch; 209. First anchoring point; 3. Transition connecting frame; 4. Support telescopic rod; 5. 501. Sliding plate; 502. Sliding block; 503. Motor bracket; 504. Motor; 505. Drill bit shaft; 506. Drill bit; 507. Sliding plate connecting block; 6. Hydraulic push-pull rod; 601. Hydraulic push-pull rod bracket; 7. Drill bit rotation stabilizing mechanism; 701. Stabilizing telescopic push rod; 702. Side connecting frame; 703. Shock-absorbing spring; 704. Intermediate connecting rod; 705. Drill bit shaft stabilizing plate; 706. Steel ball; 8. Angle detection sensor; 9. Return spring; 10. Counterweight; 1001. Counterweight water tank; 1002. Counterweight tray; 1003. Upper connecting slot. Detailed Implementation

[0025] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0026] The terminology used in this invention is that which is currently widely used in the art in consideration of the function of the invention; however, these terms may vary according to the intent of those skilled in the art, precedent, or new technology in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the invention. Therefore, the terms used in this specification should not be construed as simple names, but rather based on their meanings and the overall description of the invention.

[0027] Please see Figure 1-5 In the embodiment of the present invention, a modular micropile drilling device based on water counterweight includes a bottom frame 1 set at the bottom. The bottom frame 1 is a frame structure with a middle rod 101 in the middle and a tail rod 102 at the tail. The top surface of the middle rod 101 is provided with a middle connecting frame 103.

[0028] A drill bit frame 2 is provided above the bottom frame 1. The drill bit frame 2 is a frame structure, including left and right side rods 201, a drill bit frame top plate 202 connecting the tops of the left and right side rods 201, and a drill bit frame bottom plate connecting the bottoms of the left and right side rods 201. In addition, the rear part of the drill bit frame bottom plate is hinged to the rear part of the transition connecting frame 3. The transition connecting frame 3 and the intermediate connecting frame 103 are detachably connected. The transition connecting frame 3 includes two plate structures set at the top and bottom and a vertical plate structure connecting the two plate structures. The side of the transition connecting frame 3 is provided with a groove to facilitate the installation of bolts. Therefore, the transition connecting frame 3 and the intermediate connecting frame 103 can be fixed or disassembled by bolts. In the actual installation process, the drill bit frame 2 can be flipped backward or flipped forward to reset due to the hinged relationship with the transition connecting frame 3.

[0029] Preferably, in order to fix or limit the drill bit frame 2 in a vertical state, a limiting fixing block 203 is provided at the bottom front of the drill bit frame 2, and a limiting hole is provided on the bottom surface of the limiting fixing block 203. A limiting push rod 104 is provided at the front of the intermediate connecting frame 103. By extending upward and inserting the limiting push rod 104 into the limiting hole of the limiting fixing block 203, the drill bit frame 2 and the transition connecting frame 3 can be kept in a vertically relative limiting relationship.

[0030] Preferably, the side rods 201 on the left and right sides of the drill bit frame 2 are provided with side groove rails 204 facing outward. The top of the side groove rails 204 is not connected to the top plate 202 of the drill bit frame, but a gap or inlet is provided between the bottom surface of the top plate 202 of the drill bit frame and the top of the side groove rails 204.

[0031] To provide tilt support for the drill bit frame 2, the present invention provides at least one support telescopic rod 4 at the rear of the drill bit frame 2. In this embodiment, two support telescopic rods 4 are provided at the rear of the drill bit frame 2. A sliding stepped wheel 205 is slidably connected inside the lateral groove rail 204. The top end of the extended section of the support telescopic rod 4 is hinged to the sliding stepped wheel 205, and the bottom end of the support telescopic rod 4 is hinged to the tail rod 102. The sliding stepped wheel 205 can slide relative to each other along the interior of the lateral groove rail 204, meaning the support telescopic rods 4 can be supported at different positions on the lateral groove rail 204. When the drill bit frame 2 is tilted downwards and in a horizontal state, the sliding stepped wheel 205 gradually moves towards the root of the lateral groove rail 204 and reaches its limit position.

[0032] To avoid interference between the support telescopic rod 4 and the drill bit frame 2, the support telescopic rod 4 is preferably positioned to the side as a whole, and the end of the support telescopic rod 4 is fixed or hinged to an intermediate connecting rod and hinged to the sliding step wheel 205.

[0033] By providing a support base 105 on the top surface of the tail rod 102, during actual assembly, the drill frame 2 is flipped backward and supported on the support base 105 to achieve a horizontal state. The sliding stepped wheel 205 is inserted into the side groove rail 204 along the gap between the top plate 202 and the side groove rail 204, allowing it to move back and forth along the side groove rail 204. The end of the support telescopic rod 4 is rotatably connected to the connecting seat 106 on the surface of the tail rod 102 using bolts and nuts. During actual drilling, the extended section of the support telescopic rod 4 extends outward, increasing its actual working length and pushing the drill frame 2 from a horizontal state to a vertical state or an inclined state in the middle position. When the drill frame 2 is flipped upward to its limit position, i.e., the vertical position, the limiting push rod 104 extends outward and is inserted into the limiting fixing block 203, maintaining a reliable connection between the drill frame 2 and the transition connecting frame 3.

[0034] The front surface of the drill bit frame 2 of the present invention is provided with a linear slide rail 206 from top to bottom, and a sliding plate 5 is provided in front of the linear slide rail 206. A sliding block 501 is provided on the rear side of the sliding plate 5. The sliding block 501 has a sliding groove on its inner side that surrounds the side edge of the linear slide rail 206, thereby enabling the sliding plate 5 to move up and down in cooperation with the linear slide rail 206.

[0035] Preferably, in order to improve the sliding efficiency between the sliding plate 5 and the linear slide rail 206, in other technical solutions of the present invention, a number of rolling elements, such as rolling blocks and rolling shafts, are arranged from top to bottom on the rear back of the sliding plate 5. By having the rolling elements cooperate with the front surface of the linear slide rail 206 to roll, the original sliding friction relationship between the two can be transformed into a rolling friction relationship, thereby reducing the frictional force.

[0036] A motor bracket 502 is provided on the front surface of the sliding plate 5. The motor bracket 502 fixes the housing of the motor 503 to the sliding plate 5, so the motor 503 can move up and down with the sliding plate 5. In addition, the rotating shaft of the motor 503 in this invention is set downward, and the end of the rotating shaft of the motor 503 is connected to the drill bit shaft 504 through an intermediate conversion connecting block. The bottom end of the drill bit shaft 504 is fixedly connected to the drill bit 505. In the actual installation process, in the bottom-up connection relationship, the drill bit 505 is first fixedly connected to the bottom end of the drill bit shaft 504, and then the drill bit shaft 504 is fixedly connected to the rotating end of the motor 503. The motor 503 drives the drill bit shaft 504 to rotate, and the drill bit 505 drills the corresponding ground holes.

[0037] To adjust the vertical movement of the drill bit 505 on the ground, a hydraulic push-pull rod bracket 601 is provided above the drill bit frame 2. The hydraulic push-pull rod bracket 601 is fixedly connected to the housing of the hydraulic push-pull rod 6. The telescopic end of the hydraulic push-pull rod 601 passes downward through the hydraulic push-pull rod bracket 601, and then through an intermediate connector, such as a coupling, the telescopic end of the hydraulic push-pull rod 6 is fixedly connected to the sliding plate connecting block 506 behind the sliding plate 5. Therefore, the sliding plate 5 can be pulled upward or pushed downward by the hydraulic push-pull rod 6.

[0038] In the actual construction process, the drill bit 505 is rotated by the motor 503. At the same time, the sliding plate 5 is pushed downward by the telescopic end of the hydraulic push-pull rod 6, which realizes the downward process of the drill bit 505 drilling and excavates a ground hole for placing the micro-pile pipe.

[0039] In actual construction, for micropiles installed at an angle, it is necessary to excavate inclined ground holes, and then place the micropiles into the ground holes. It is important to ensure that there is no obvious concentricity deviation on the inner wall of the ground hole, that is, no obvious shaking or other abnormalities during the drilling process, so as to ensure that the installation process can proceed smoothly.

[0040] To reduce concentricity deviation, the present invention provides a drill bit rotation stabilizing mechanism 7 on the lower part of the front surface of the sliding plate 5 and on the lower part of the front surface of the drill bit frame 2. The drill bit rotation stabilizing mechanism 7 includes a stabilizing telescopic push rod 701 with retractable ends. The telescopic ends of the stabilizing telescopic push rods 701 are hinged to the rear end of the side connecting frame 702 in a planar manner. The front ends of the side connecting frame 702 are fixedly connected to the ends of the shock-absorbing springs 703, and are hinged to the inner side of the side connecting frame 702 with a middle connecting rod 704. The other end of the middle connecting rod 704 is fixedly connected to the drill bit shaft stabilizing plate 705. Specifically, the drill bit shaft stabilizing plate 705 of the present invention has a groove on its inner side, corresponding to the outer circumferential surface of the drill bit shaft 504, and there is a certain gap between the two.

[0041] Please see Figure 3 During actual installation, both ends of the stabilizing telescopic push rod 701 extend to the side simultaneously, and the distance between the two rear ends of the side connecting bracket 702 gradually increases. Correspondingly, the distance between the two drill bit shaft stabilizing plates 705 also gradually increases, but the shock-absorbing spring 703 located at the front will be stretched. At this time, the drill bit shaft 504 used to drill the ground hole can easily pass through the gap between the two drill bit shaft stabilizing plates 705.

[0042] When the drill bit 505 drills into the ground, the two ends of the stabilizing telescopic push rod 701 retract inward, pulling the side connecting frame 702 closer to the drill bit shaft 504, while the shock-absorbing spring 703 changes from a stretched state to a restoring state. During the drilling process, if there is radial runout of the drill bit shaft 504, the drill bit shaft 504 will move radially, contacting the drill bit shaft stabilizing plate 705 and pushing it to move radially accordingly. The vibration generated by the back-and-forth radial movement of the drill bit shaft 504 will be buffered by the shock-absorbing spring 703.

[0043] Preferably, the drill bit shaft stabilizing plate 705 of the present invention has a plurality of steel balls 706 on its inner circumferential surface. Please refer to [link to relevant documentation]. Figure 3 Furthermore, the steel ball 706 is partially located inside the drill shaft stabilizing plate 705, while the steel ball 706 extends beyond the inner side of the drill shaft stabilizing plate 705 and contacts the outer peripheral surface of the drill shaft 504. Since the steel ball 706 can rotate relative to the drill shaft stabilizing plate 705, by tightly attaching the drill shaft stabilizing plate 705 to the outer peripheral surface of the drill shaft 504, the normal rotation of the drill shaft 504 can be ensured. In addition, the vibration damping spring 703 provides elastic deformation constraint, alleviating the noise problem generated by the drill shaft 504 during the drilling stage. In particular, when the drill shaft 504 changes from a horizontal state to an inclined state, the drill shaft stabilizing plate 705 clamps and fixes the drill shaft 504 to prevent the drill shaft 504 from shifting, and ensures that the drill shaft 504 can reliably and accurately align and position itself before drilling.

[0044] Please see Figure 1 and Figure 2 In the technical solution of the present invention, an angle detection sensor 8 is provided on the interface side between the bottom plate of the drill bit frame 2 and the transition connecting frame 3. Since the bottom plate of the drill bit frame and the transition connecting frame 3 are hinged, the drill bit frame 2 can be flipped relative to the transition connecting frame 3. By setting the angle detection sensor 8, the relative angle between the bottom surface of the drill bit frame 2 and the top surface of the transition connecting frame 3 can be detected. If the two surfaces are in contact with each other, the angle detected by the angle detection sensor 8 is 0°.

[0045] More importantly, the angle detection sensor 8 detects the change in angle between the two between 0° and 90°. Since the drill bit 505 of this invention needs to drill not only vertically but also at an angle, it is not easy for operators to detect the angle between the drill bit shaft 504 and the ground during actual construction. The angle detection sensor 8 detects the angle between the bottom surface of the drill bit frame and the transition connecting frame 3 in real time and transmits the corresponding signal to the controller. The controller then adjusts the drill bit angle to pre-set the ground angle. If the angle between the drill bit 505 axis and the ground does not meet the requirements, the controller controls the corresponding support telescopic rod 4 to extend or retract, pushing the drill bit frame 2 forward or pulling it outward to adjust the angle of the drill bit frame 2 in real time, which is equivalent to adjusting the angle of the drill bit shaft 504's central axis relative to the ground. Furthermore, during the angle adjustment process of the drill bit shaft 504, the drill bit shaft 504 does not need to move axially. Therefore, the controller and the stabilizing telescopic push rod 701 retract inward, and the distance between the drill bit shaft stabilizing plate 705 gradually decreases to clamp the outer circumferential surface of the drill bit shaft 504. Therefore, no vibration will occur during the angle adjustment process of the drill bit shaft 504, and the final angle of the drill bit shaft 504 after adjustment can fully meet the actual construction requirements.

[0046] To achieve the modularity of the present invention, when the device of the present invention is structurally disassembled or classified, the drill bit shaft 504 is connected to the motor 503, and the motor 503 is connected to the sliding plate 5 through the motor bracket 502. Therefore, the drill bit 505, drill bit shaft 504, motor 503, and sliding plate 5 serve as the first component in the disassembled state. The first component moves up and down along the drill bit frame 2 via the sliding plate 5, and the bottom of the drill bit frame 2 is pivotally connected to the transition connecting frame 3. In addition, the bottom of the transition connecting frame 3 is bolted to the bottom frame 1, and the hydraulic push-pull rod 6 is installed on the top of the drill bit frame 2. The telescopic section of the hydraulic push-pull rod 6 extends downward into the internal space of the drill bit frame 2. Figure 1 It can be seen that the hydraulic push-pull rod 6 is generally elongated for easy transportation; therefore, the drill bit frame 2, the transition connecting frame 3, and the hydraulic push-pull rod 6 are considered the second component. The bottom frame 1 has a larger overall size and is considered the third component. The support telescopic rod 4 is located on the rear side of the drill bit frame 2. The top of the support telescopic rod 4 is hinged to the sliding stepped wheel 205, and the sliding stepped wheel 205 enters the side groove 204 from the top opening of the side groove rail 204. The bottom of the support telescopic rod 4 is hinged to the bottom frame 1; therefore, the support telescopic rod 4 is considered the fourth component. Therefore, before actual transportation, the first, second, third, and fourth components are disassembled to facilitate transport.

[0047] To achieve the lightweight objective of this invention, the bottom frame 1 is a hollow structure, combined with the appendix of this invention. Figure 1 It can be understood that the bottom frame 1 of the technical solution of the present invention includes left and right side rods, a middle rod 101, and a tail rod 102. By setting the left and right side rods, the middle rod 101, and the tail rod 102 as hollow structures, and the internal cavities of the three are interconnected, water is injected into the internal cavities of the three through the first water injection hole 107 provided on the surface of the left and right side rods to fill the water. After filling the water, the first water injection hole 107 is sealed by a sealing structure such as a screw cap to prevent water leakage.

[0048] In addition, the side rods 201 on the left and right sides of the drill bit frame 2 are also hollow structures, and a second water injection hole 207 is provided on the front surface of the side rod 201. Water is injected into the side rod 201 through the second water injection hole 207 to fill and seal the cavity inside the side rod.

[0049] Since the modular micropile drilling device based on water counterweight of the present invention needs to be applied to the excavation of micropile pipes in rugged areas such as mountainous regions, by setting the main structure of the bottom frame 1 and the drill bit frame 2 as an internal hollow structure, it is convenient to inject water into it before actual drilling, so as to ensure that the overall device maintains good stability during the actual drilling process. The injected water can be obtained by transporting it from the bottom of the mountain to the top through a pre-built water pipeline.

[0050] As an optional embodiment, when the modular micropile drilling device based on water counterweight of the present invention is used for vertical hole drilling, and water is injected into the corresponding structure, the total weight of the motor 503, motor bracket 502, drill bit shaft 504, drill bit 505, and the upper and lower drill bit rotation stabilization mechanisms 7 located on the front side of the bottom frame 1 is the first total weight. The total weight of the hydraulic push-pull rod 6, drill bit frame 2, sliding plate 5, transition connecting frame 3, and intermediate connecting frame 103 is the second total weight, and the total weight of the two supporting telescopic rods 4 and support base 105 located at the rear is the third total weight, wherein the ratio of the first total weight, the second total weight, and the third total weight is 1:1:1. Through the above total weight limitation, good stability is maintained when the modular micropile drilling device based on water counterweight of the present invention performs vertical drilling.

[0051] Please see Figure 4 , Figure 5Preferably, when the modular micro-pile drilling device based on water counterweight of the present invention is applied to drill inclined ground holes and the drill bit shaft 504 is already in a vertical state, a first anchor point 209 can be set on the back of the drill bit frame 2 in advance, and a second anchor point 108 can be set on the side surface of the support base 105. The first anchor point 209 and the second anchor point 108 are connected by the return spring 9, so that the drill bit shaft 504 is in a mechanically fixed position in a vertical state and cannot be changed to an inclined state, and the support telescopic rod 4 cannot pull the drill bit frame 2 to flip backward. The return spring applies a backward force to the drill bit frame 2, which can ensure the normal backward flipping of the drill bit frame 2.

[0052] Please see Figure 1-5 The present invention also discloses a construction method for a modular micropile drilling device based on water counterweight. The device is transported to a designated construction location through the first, second, third and fourth components mentioned above. The bottom frame 1, which is the third component, is placed flat on the ground. The drill bit frame 2 is then placed flat on the bottom frame 1. The transition connecting frame 3 at the bottom of the drill bit frame 2 is rotated downward by 90° and supported on the intermediate connecting frame 103 on the top surface of the intermediate rod 101. The transition connecting frame 3 and the intermediate connecting frame 103 are fixedly connected by bolts or other connectors. The rear of the drill bit frame 2 is supported by the support seat 105 at the rear of the bottom frame 1, so that the entire drill bit frame 2 is in a horizontal position.

[0053] Next, the sliding step wheel 205 at the front end of the support telescopic rod 4 passes through the notch 208 above the side groove rail 204 and enters the side groove rail 204. It is necessary to ensure that the sliding step wheel 205 can move back and forth along the side groove rail 204. After moving the sliding step wheel 205 towards the root of the side groove rail 204 and moving it to a suitable position, the other end of the support telescopic rod 4 is rotatably connected to the surface mounting structure of the bottom frame 1.

[0054] The sliding plate 5, together with the motor 503 and the drill shaft 504 on which the drill bit 505 is mounted, is slidably connected to the linear slide rail 206 on the surface of the drill frame 2. The two ends of the stabilizing telescopic push rod 701 are moved outward to increase the distance between the two ends of the rear part of the side connecting frame 702, and the distance between the two drill shaft stabilizing plates 705 is also increased accordingly, so that the drill shaft 504 can pass through the gap between the two drill shaft stabilizing plates 705.

[0055] When the sliding plate 5 moves to the appropriate position, the connecting block on the back of the sliding plate 5 is fixedly connected to the bottom end of the hydraulic push-pull rod 6 through the coupling. Therefore, the sliding plate 5 can be pulled by the hydraulic push-pull rod 6 to adjust the actual working position of the sliding plate 5.

[0056] Finally, in the assembled state, water is injected into the first water injection hole 107 on the surface of the bottom frame 1 so that the hollow structure inside the bottom frame 1 is filled with water, and water is injected into the side rod 201 of the drill bit frame 2 through the second water injection hole 207 on the front surface of the drill bit frame 2. In this way, the overall weight of the entire device can be increased. Therefore, in the actual drilling state, the center of gravity of the entire device is lower, which can achieve stable drilling.

[0057] Please see Figure 6 Preferably, the bottom frame 1 of the present invention has an upward-facing lower connecting slot 109 on its side, and a counterweight 10 for water injection is provided on the outside of the bottom frame 1. The counterweight 10 has an downward-facing upper connecting slot 1003 on its side. By inserting the upper connecting slot 1003 of the counterweight 10 into the lower connecting slot 109 of the bottom frame 1, the counterweight 10 and the bottom frame 1 can be connected conveniently and quickly. Water is injected into the counterweight 10 to increase the overall weight of the counterweight 10, making the modular micro-pile drilling device based on water counterweight more stable and reliable in actual operation.

[0058] Specifically, the counterweight component of the present invention is a counterweight water tank 1001 located on the side, wherein the top of the counterweight water tank 1001 has an opening, and water is injected into the counterweight water tank 1001 through a water pipe to increase the overall weight of the counterweight water tank 1001.

[0059] Alternatively, the counterweight 10 can be a counterweight tray 1002 located at the rear. By placing stones from the site on the surface of the counterweight tray 1002, the actual effective weight of the counterweight tray 1002 can be increased.

[0060] When drilling is required to create vertical ground holes, the telescopic end of the support telescopic rod 4 extends outward, and the sliding step wheel 205 moves along the side groove rail 204. The support telescopic rod 4 flips the drill bit frame 2 forward as a whole. The angle detection sensor 8 measures the angle between the bottom surface of the drill bit frame 2 and the top surface of the transition connecting frame 3. If the angle between the two supports is 0, the support telescopic rod 4 is controlled to be in a pressure-holding state. The limit push rod 104 extends upward and inserts into the limit fixing block 203, which can maintain the drill bit frame 2 and the transition connecting frame 3 in a vertically relative limiting relationship. The motor 503 drives the drill bit shaft 504 and the drill bit 505 to rotate. The hydraulic push-pull rod 6 pushes the sliding plate 5 downward, so the drill bit 505 is in a rotating and pressing state to drill holes in the ground to form corresponding vertical ground holes.

[0061] When drilling into an inclined surface, the telescopic end of the support telescopic rod 4 extends or retracts, causing the sliding step wheel 205 to move along the side groove rail 204. The support telescopic rod 4 also flips the drill bit frame 2 forward or backward, and the angle sensor 8 continuously monitors the angle between the bottom surface of the drill bit frame 2 and the top surface of the transition connecting frame 3. If the angle between the two supports is within the required range, the support telescopic rod 4 is held in a pressure-holding state, and the motor 503 drives the drill bit shaft 504 and the drill bit 505 to rotate. The hydraulic push-pull rod 6 pushes the sliding plate 5 to tilt downwards, thus the drill bit 505 is in a rotating and pressing state to drill a hole in the ground, forming the corresponding inclined surface. Finally, it should be noted that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways as long as they do not depart from the scope of the present invention.

Claims

1. A modular micropile drilling device based on water counterweight, characterized in that: include, The bottom frame (1) has a cavity inside that can be filled with water; The drill bit frame (2) has a cavity that can be filled with water. The bottom of the drill bit frame (2) is connected to the bottom frame (1) by a transition connecting frame (3). The drill bit assembly is connected to the front of the drill bit frame (2) via a sliding plate (5); The support assembly includes a support telescopic rod (4), the fixed end of which is detachably hinged to the bottom frame (1), and the telescopic end of which is detachably connected to the drill bit frame (2); wherein, By controlling the extension and retraction of the support telescopic rod (4), the drill bit frame (2) is pushed to flip, so as to adjust the angle between the central axis of the drill bit assembly and the ground.

2. The modular micropile drilling device based on water counterweight according to claim 1, characterized in that: The bottom frame (1) has a middle rod (101) in the middle, and a middle connecting frame (103) is provided on the surface of the middle rod (101). The middle connecting frame (103) is detachably connected to the transition connecting frame (3), and the rear part of the transition connecting frame (3) is pivotally connected to the rear part of the drill bit frame (2).

3. The modular micropile drilling device based on water counterweight according to claim 2, characterized in that: An angle detection sensor (8) is provided on the side of the mating surface of the transition connecting frame (3) and the drill bit frame (2) to detect the angle change between the mating surfaces. The limiting push rod (104) at the front of the transition connecting frame (3) is fixedly connected to the limiting fixing block (203) installed at the front of the drill bit frame (2).

4. A modular micropile drilling device based on water counterweight according to any one of claims 1 to 3, characterized in that: The drill bit frame (2) is provided with a linear slide rail (206) on its side, and the sliding plate (5) is slidably connected to the linear slide rail (206); the drill bit frame (2) is provided with a hydraulic push-pull rod (6) on its top, and the telescopic end of the hydraulic push-pull rod (6) is connected to the sliding plate (5); the sliding plate (5) is fixedly connected to the motor (503) through the motor bracket (502), and the rotation shaft of the motor (503) is connected to the drill bit (505) through the drill bit shaft (504).

5. The modular micropile drilling device based on water counterweight according to claim 4, characterized in that: The sliding plate (5) and the drill bit frame (2) are provided with a drill bit rotation stabilization mechanism (7) at the lower front part. The drill bit rotation stabilization mechanism (7) includes a stabilizing telescopic push rod (701). The two ends of the stabilizing telescopic push rod (701) are respectively hinged to the rear of the side connecting frame (702). The middle part of the side connecting frame (702) is hinged to the drill bit shaft stabilizing plate (705). The front part of the side connecting frame (702) is fixedly connected to the shock-absorbing spring (703). The gap between the drill bit shaft stabilizing plate (705) and the outer circumference of the drill bit shaft (504) can be adjusted by adjusting the length of the stabilizing telescopic push rod (701).

6. The modular micropile drilling device based on water counterweight according to claim 5, characterized in that: The inner side of the drill bit shaft stabilizing plate (705) is provided with several rotatable rolling elements (706). The rolling of the rolling elements (706) and the outer circumference of the drill bit shaft (504) is controlled by the actual working length of the stabilizing telescopic push rod (701) and the elastic deformation of the shock-absorbing spring (703).

7. A modular micropile drilling device based on water counterweight according to claim 5 or 6, characterized in that: The bottom frame (1) has a first water injection hole (107) on its top surface, and the drill bit frame (2) has a second water injection hole (207) on its front surface of the side rod (201). When the bottom frame (1) and the drill bit frame (2) are filled with water and the drill bit shaft (504) is in the vertical drilling hole, the total weight of the motor (503), the motor bracket (502), the drill bit shaft (504), the drill bit (505), and the upper and lower drill bit rotation stabilizing mechanisms (7) is the first total weight; the total weight of the hydraulic push-pull rod (6), the drill bit frame (2), the sliding plate (5), the transition connecting frame (3), and the intermediate connecting frame (103) is the second total weight; the total weight of the two support telescopic rods (4) located at the rear and the support seat (105) set at the rear of the bottom frame (1) is the third total weight; the ratio of the first total weight, the second total weight, and the third total weight is 1:1:

1.

8. A modular micropile drilling device based on water counterweight according to claim 1 or 2, characterized in that: The bottom frame (1) can also be detachably connected to a counterweight (10) for water injection.

9. A modular micropile drilling device based on water counterweight according to claim 1, characterized in that: The bottom frame (1) is provided with a support base (105) at the rear, the drill bit frame (2) is provided with a first anchor point (209) on the back, and the support base (105) is provided with a second anchor point (108) on the side. The first anchor point (209) and the second anchor point (108) are connected by a return spring (9).

10. A construction method, characterized in that: The invention includes a modular micropile drilling device based on water counterweight, comprising, as described in any one of claims 1 to 9, a modular micropile drilling device based on water counterweight, comprising, The bottom frame (1) is placed flat on the ground, the drill bit frame (2) is placed on the bottom frame (1), and the drill bit frame (2) and the bottom frame (1) are connected by the transition connecting frame (3) so that the two can be flipped. The telescopic end of the support telescopic rod (4) is slidably connected to the side groove rail (204) provided on the side of the drill bit frame (2); The sliding plate (5) together with the drill assembly on which the drill bit (505) is installed is slidably connected to the drill frame (2); when the sliding plate (5) slides to a suitable position, it is fixedly connected to the hydraulic push-pull rod (6) located on the top of the drill frame (2). Water is injected into the bottom frame (1) and the drill bit frame (2); When drilling vertically, the support telescopic rod (4) extends outward, flipping the drill bit frame (2) forward as a whole. The angle between the bottom surface of the drill bit frame (2) and the top surface of the transition connecting frame (3) is detected by the angle detection sensor (8). If the angle is 0°, the support telescopic rod (4) is controlled to be in a pressure-holding state, and the limit push rod (104) extends upward and inserts into the limit fixing block (203) for limit. The drill bit assembly is driven to rotate, and the sliding plate (5) is pushed downward by the hydraulic push-pull rod (6) to drill vertically into the ground. When drilling a ground hole at an angle, the support telescopic rod (4) retracts, flipping the drill bit frame (2) backward as a whole. The angle detection sensor (8) detects the angle between the bottom surface of the drill bit frame (2) and the top surface of the transition connecting frame (3) in real time. If the angle between the two is the required angle, the support telescopic rod (4) is controlled to be in a pressure-holding state, driving the drill bit assembly to rotate. The hydraulic push-pull rod (6) pushes the sliding plate (5) to move downward at an angle to form an inclined ground hole.

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