Gravel geologic body root pile hole forming device and hole forming method thereof

Abstract

The invention relates to the technical field of gravel geologic body root pile hole forming, and provides a gravel geologic body root pile hole forming device and a hole forming method thereof, in the hole forming process, a protection wall structure is applied to a root pile hole wall to support the hole wall, and the problem that gravel on the root pile hole wall falls off or hole collapse is caused is avoided. According to the scheme, a supporting plate is rotationally connected to a drill rod; the supporting pipe is fixed to the side, back on to the drill bit, of the supporting plate, the supporting pipe is arranged on the drill rod in a sleeving mode, and the drill rod can rotate relative to the supporting pipe. The air bag sleeves the supporting tube and is located at the position, close to the supporting plate, of the supporting tube; the cylindrical net racks are connected end to end in the axial direction through connecting pieces, the connecting pieces are provided with easy-to-fold marks, the cylindrical net racks are arranged on the supporting pipes in a sleeving mode, the cylindrical net rack located on the head portion is movably arranged on the air bag in a sleeving mode, and when the air bag is inflated, the cylindrical net racks can be opened and broken off from the easy-to-fold marks to be used for supporting the hole wall.

Description

Technical Field

[0001] This invention relates to the field of hole-forming technology for tree root piles in gravel geological bodies, and in particular to a hole-forming device and method for tree root piles in gravel geological bodies. Background Technology

[0002] In engineering, problems such as weak or slippery slope soil are frequently encountered. When slope movement occurs around human engineering projects and production and living areas, slope reinforcement is necessary. Root piles, especially those made of a mesh-structure tree root pile, possess strong shear resistance and stable mechanical characteristics, making them highly effective in loose and unstable geological formations such as gravel. However, when drilling holes for inclined branch piles with main piles connected to them, the drill bit and drill rod need to be extracted after drilling. Because gravel is relatively loose and unstable, hole collapse is prone to occur during drilling and the extraction of the drill rod and drill bit. This necessitates re-drilling, causing difficulties and impacting construction efficiency. Summary of the Invention

[0003] The purpose of this invention is to provide a hole-forming device and method for root piles in gravelly geological bodies. During the hole-forming process, a protective wall structure is applied to the hole wall to support it, preventing gravel from falling off the hole wall or causing hole collapse. Furthermore, after adding a waterproof membrane to the protective wall device, it can also prevent groundwater in the loose rock and soil of the hole wall from diluting the grout in the hole or causing grout leakage.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A hole-forming device for root piles in gravelly geological formations includes a hole-forming machine carrier, an adjustable-angle hole-forming platform on the carrier, a slide rail on the platform, a mounting block slidably connected to the slide rail, a linear displacement drive mechanism on the platform for driving the mounting block to move linearly, a drill rod rotatably connected within the mounting block, a rotary drive mechanism connected to the rear end of the drill rod, and a drill bit mounted at the head of the drill rod.

[0006] A support plate, which is rotatably connected to the drill rod, is installed close to the drill bit;

[0007] A support tube is fixed to the side of the support plate facing away from the drill bit. The support tube is sleeved on the drill rod, and the drill rod can rotate relative to the support tube.

[0008] An airbag is fitted onto a support tube and is located near a support plate on the support tube.

[0009] The plurality of cylindrical net racks are connected by connectors in axial direction, the connectors are provided with easy fold marks, the cylindrical net racks are sleeved on the support pipes, the cylindrical net racks at the head part can move and be sleeved on the air bags, and when the air bags are inflated, the cylindrical net racks can be expanded and broken off from the easy fold marks to support and stabilize the hole wall.

[0010] Further, the support pipe on the side of the air bag away from the support plate is provided with a first slope, the highest part of the first slope is higher than or equal to the height of the air bag in the state of not being inflated, and the first slope is used to guide the cylindrical net rack to the air bag.

[0011] Further, the device further comprises a push-in cylinder, the push-in cylinder can be sleeved on the support pipe, and the push-in cylinder is used to push the cylindrical net rack towards the drill bit.

[0012] Further, the device further comprises a protection cylinder, the protection cylinder sleeves the cylindrical net rack and the air bag inside, the support pipe between the air bag and the support plate is provided with a second slope, the second slope is conical, and the second slope is provided with a mounting hole inside, the mounting hole sleeves the support pipe, and the second slope is used to guide the protection cylinder.

[0013] Further, the side of the support plate facing the air bag is embedded with an annular magnet piece, the second slope is located within the annular range of the annular magnet piece, the end of the protection cylinder facing the annular magnet piece is made of ferromagnetic material, and the annular magnet piece is used to attract the protection cylinder.

[0014] Further, the grid unit of the cylindrical net rack is a parallelogram.

[0015] Further, at least one support group is arranged in the axial direction of the cylindrical net rack, the support group comprises an even number of fixed blocks fixed in the circumferential direction of the cylindrical net rack, the fixed blocks are provided with sliding grooves with the same center as the cylindrical net rack, two adjacent sliding grooves are slidably connected with elastic support pieces, the inner side of the elastic support pieces is uniformly distributed with opposite ratchets at both ends in the circumferential direction, the sliding grooves are provided with ratchet claws matched with the ratchets, so that when the cylindrical net rack is expanded, the ratchet claws can move on the ratchets when the adjacent fixed blocks move away from each other, and the ratchet claw and ratchet structure prevent the adjacent fixed blocks from moving close to each other.

[0016] Further, the outside of the cylindrical net rack is wrapped with an elastic waterproof layer.

[0017] A hole forming method using a gravel geological body tree root pile hole forming device, the tree root pile has a main pile and branch piles connected to the main pile, the branch piles are arranged obliquely downward along the internal direction of the main pile; the pile hole forming process of the tree root pile is:

[0018] Step 1, the hole of the main pile is formed, the drilling angle is adjusted through the hole forming platform, the drilling rod is adjusted to the drilling posture of the main pile hole, then the linear displacement driving mechanism and the rotary driving mechanism are started, the gravel geological body is drilled, after drilling for a distance, the drilling rod is stopped, the frontmost cylindrical net rack is moved to the air bag, then the air bag is inflated, the air bag expands to drive the cylindrical net rack to stand up, until the air bag stands up the cylindrical net rack to the hole wall, at this time the air bag stops expanding and starts to deflate, until the air bag returns to the original state, then the drilling rod continues to drill forward, after drilling for a distance, the cylindrical net rack is again supported by the air bag to form the hole wall, then the drilling continues, the above actions are repeated until the drilling is completed;

[0019] Step 2, the hole of the branch pile is formed, the drilling angle is adjusted through the hole forming platform, the drilling rod is adjusted to the drilling posture of the branch pile hole, then the linear displacement driving mechanism and the rotary driving mechanism are started, the gravel geological body is drilled, after drilling for a distance, the hole forming operation is paused, the frontmost cylindrical net rack is moved to the air bag, then the air bag is inflated, the air bag expands to drive the cylindrical net rack to stand up, until the air bag stands up the cylindrical net rack to the hole wall, at this time the air bag stops expanding and starts to deflate, until the air bag returns to the original state, then the drilling rod continues to drill forward, after drilling for a distance, the cylindrical net rack is again supported by the air bag to form the hole wall, then the drilling continues, the above actions are repeated until the hole forming is completed.

[0020] A hole forming method using a gravel geological body hole forming and wall supporting construction device,

[0021] Step 1, the hole of the main pile is formed, the drilling angle is adjusted through the hole forming platform, the drilling rod is adjusted to the drilling posture of the main pile hole, then the linear displacement driving mechanism and the rotary driving mechanism are started, the gravel geological body is formed, after drilling for a distance, the hole forming operation is paused, the frontmost cylindrical net rack is moved to the air bag, then the protective cylinder is retreated by one station, and the front cylindrical net rack is exposed,

[0022] then the air bag is inflated, the air bag expands to drive the cylindrical net rack to stand up, until the air bag stands up the cylindrical net rack tightly against the inner wall of the hole, at this time the air bag stops expanding and starts to deflate, until the air bag returns to the original state, then the protective cylinder is advanced by one station until it touches the supporting plate,

[0023] then the drilling rod continues to drill forward, after drilling for a distance, the protective cylinder is moved again, the cylindrical net rack is supported by the air bag to support the hole wall, then the hole forming continues, the above actions are repeated until the drilling is completed;

[0024] Step 2, the pile hole of the branch pile is formed, the drilling angle is adjusted through the hole forming platform, the drill rod is adjusted to the hole forming posture of the branch pile hole, then the linear displacement driving mechanism and the rotary driving mechanism are started, the gravel geological body is formed, after drilling for a distance, the hole forming operation is paused, the frontmost tubular net rack is moved to the air bag, then the protective cylinder is retreated by one station, the front end of the tubular net rack is exposed,

[0025] then the air bag is inflated, the air bag is inflated to drive the tubular net rack to stand up, until the air bag supports the tubular net rack to stand up and stabilize the hole wall, at this time, the air bag stops inflation and starts to release and shrink, until the air bag returns to the original state, then the protective cylinder is advanced by one station until it touches the support plate,

[0026] then the drill rod continues to drill forward, after drilling for a distance, the protective cylinder is moved again, the tubular net rack is supported and stabilized by the air bag, then the drilling continues, and the above actions are repeated until the drilling is completed.

[0027] The beneficial effects of the present application are: 1. By inflating the air bag while drilling, the tubular net rack is lifted to stabilize the hole wall, which is used to support the hole wall and prevent the hole wall of the loose gravel geological body from collapsing; by installing the drill rod structure on a hole forming platform that can adjust the angle, it is convenient to form the main pile hole of the root pile and the branch pile hole in the loose gravel geological body;

[0028] 2. By setting a protective cylinder outside the air bag, the air bag is protected from damage during drilling; when the protective cylinder is moved backward by one station to expose the end tubular net rack, the protective cylinder covers the rear tubular net rack at this time, so that when the end tubular net rack is lifted, the protective cylinder limits the lifting of the rear tubular net rack, making the end tubular net rack and the connected tubular net rack easy to break off at the easy break mark of the connecting piece;

[0029] 3. A plurality of tubular net racks are connected in sequence, two tubular net racks are connected through connecting pieces, and the connecting pieces are provided with easy break marks; when the air bag is inflated to lift the end tubular net rack, the easy break mark between the end tubular net rack and the connected tubular net rack breaks, causing the head tubular net rack to separate and then expand to support the hole wall, and in the next drilling station, the tubular net rack connected to the head tubular net rack in the previous station becomes the new end tubular net rack, the plurality of tubular net racks are fed in sequence to support the hole wall at different positions, and the continuity is strong;

[0030] 4. A layer of elastic waterproof layer is arranged outside or inside the tubular net rack, so that when the tubular net rack is lifted and supported on the hole wall, underground water can be prevented from seeping into the hole, and slurry in the hole can also be prevented from seeping into the underground water. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present application, the following will briefly introduce the drawings required to be used in the embodiments description. Obviously, the drawings in the following description only some of the embodiments of the present application, and for those skilled in the art, without creative labor, can also obtain other drawings according to these drawings.

[0032] Figure 1 is a perspective view of the present application;

[0033] Figure 2 is a perspective view of the present application;

[0034] Figure 3 is a perspective view of the present application;

[0035] Figure 4 is a perspective view of the present application;

[0036] Figure 5 is a perspective view of the protective cylinder part of the present application;

[0037] Figure 6 is a perspective view of the push-in cylinder part of the present application;

[0038] Figure 7 is a perspective view of the push-in cylinder part of the present application;

[0039] Figure 8 is a perspective view of the drill pipe and the cylindrical lattice part of the present application (protective cylinder transparent);

[0040] Figure 9 is a perspective view of the drill pipe and the cylindrical lattice part of the present application (protective cylinder removed);

[0041] Figure 10 is a perspective view of the drill pipe and the air bag part of the present application;

[0042] Figure 11 is a perspective view of the drill pipe and the air bag part of the present application;

[0043] Figure 12 is a perspective view of the cylindrical lattice of the present application;

[0044] Figure 13 is a side view of the cylindrical lattice of the present application;

[0045] Figure 14 is a perspective view of the present application Figure 13 is a sectional view in A-A direction of the present application;

[0046] Figure 15 is a perspective view of the present application Figure 13 is a left view of the present application;

[0047] Figure 16A state diagram of the invention in the process of drilling;

[0048] Figure 17 A structural diagram of the invention for installing a spring plunger between a support tube and a push-in barrel;

[0049] Figure 18 A schematic diagram of an embodiment of the invention for a root pile hole.

[0050] Explanation of reference signs: drill rod 1, drill bit 2, support plate 3, support tube 4, air bag 5, cylindrical net rack 6, connecting piece 7, easy fold mark 8, first slope 9, push-in barrel 10, protective barrel 11, second slope 12, annular magnet sheet 13, fixed block 14, sliding groove 15, elastic support sheet 16, ratchet 17, pawl 18, elastic waterproof layer 19, mounting block 20, first sliding way 21, first sliding block 22, first power telescopic rod 23, first rack 24, first electromagnetic push rod 25, first clamping tooth 26, second sliding way 27, second sliding block 28, second power telescopic rod 29, second rack 30, second electromagnetic push rod 31, second clamping tooth 32, hole forming machine carrier 33, hole forming platform 34, sliding rail 35, linear drive motor 36, linear drive screw 37, rotary drive motor 38, gear set 39, spring plunger 40, arc-shaped recess 41, hydraulic cylinder 42. DETAILED DESCRIPTION

[0051] The technical solutions in the embodiments of the invention will be described clearly and completely below with reference to the drawings in the embodiments of the invention. Obviously, the described embodiments are only some of the embodiments of the invention, rather than all the embodiments. Based on the embodiments in the invention, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the scope of protection of the invention.

[0052] The invention relates to a root pile hole forming device for a sand and gravel geological body and a hole forming method thereof.

[0053] In the application, a hole forming machine carrier 33 is included, which can be an engineering vehicle. One end of a hole forming platform 34 is rotatably connected to the hole forming machine carrier 33, and the middle part of the hole forming platform 34 is rotatably connected to one end of a hydraulic cylinder 42, and the other end of the hydraulic cylinder 42 is rotatably connected to the hole forming machine carrier 33. A sliding rail 35 extending along the length direction of the hole forming platform 34 is arranged on the hole forming platform 34, and a mounting block 20 is slidably connected to the sliding rail 35. A linear displacement driving structure for driving the mounting block 20 to linearly displace is arranged on the hole forming platform 34, and the linear displacement driving structure includes a linear driving motor 36, the linear driving motor 36 is connected to a linear driving lead screw 37, the linear driving lead screw 37 is rotatably connected to the hole forming platform 34, and the linear driving lead screw 37 is threadedly connected to the mounting block 20. A rotary driving device is fixed to the mounting block 20, and the rotary driving device includes a rotary driving motor 38, the rotary driving motor 38 is connected to a drill rod 1 through a gear set 39, and the drill rod 1 is driven to rotate. The hole forming machine carrier described above is only one embodiment, and many hole forming machine carriers capable of adjusting the angle of the drill rod in the prior art can also be applied to the application to drive the drill rod to adjust the drilling angle and perform hole forming operation. Figure 18 A schematic view of a tree root pile hole is shown, including a main pile hole and a branch pile hole. When the branch pile hole is constructed, the drill rod needs to be inclined. If the diameter of the main pile hole is not enough, the upper part of the main pile hole can be reamed.

[0054] For the construction device in the application, the drill rod 1 and the drill bit 2 at the head of the drill rod 1 are included, a support plate 3 is installed on the drill rod 1 behind the drill bit 2, preferably, the support plate 3 can be a circular plate with a hole in the middle, and the hole in the middle of the support plate 3 is rotatably connected to the drill rod 1 through a bearing. A support pipe 4 is fixed to the rear side of the support plate 3, the support pipe 4 is sleeved on the drill rod 1, and the drill rod 1 can rotate relative to the support pipe 4. In order to maintain the stability of the support pipe 4, a bearing can also be connected between the support pipe 4 and the drill rod 1. A cylindrical air bag 5 is sleeved on the support pipe 4 close to the support plate 3, and the air pipe of the air bag 5 can extend to the outside of the support pipe 4 along the inside of the support pipe 4. A plurality of cylindrical net racks 6 are sleeved on the support pipe 4 behind the air bag 5, and the plurality of cylindrical net racks 6 are connected through connecting pieces 7.

[0055] The connecting piece 7 can be two connecting pieces symmetrically arranged between two adjacent cylindrical lattice trusses 6, and a foldable notch 8 is arranged in the middle of the connecting piece. The connecting piece 7 makes the plurality of cylindrical lattice trusses 6 form a connected whole, and the foldable notch 8 arranged on the connecting piece 7 makes the foldable notch 8 break when the head cylindrical lattice truss 6 is forced to open, without opening the cylindrical lattice truss 6 adjacent to the head. On the basis of adding the protection cylinder 11, when the protection cylinder 11 retreats one station to expose the cylindrical lattice truss 6 on the air bag 5, the rear cylindrical lattice truss 6 is still in the protection cylinder 11, and at this time, the protection cylinder 11 can prevent the rear cylindrical lattice truss 6 from being opened.

[0056] The cylindrical lattice truss 6 in the application is an inflatable lattice truss, and the basic grid can be a parallelogram. When the cylindrical lattice truss 6 is expanded by the air bag 5, the air bag 5 is pushed into the hole wall of the sandy geological body, and the cylindrical lattice truss 6 itself has a certain elastic force. At this time, the cylindrical lattice truss 6 can support the loose soil on the hole wall, preventing a large amount of soil or pebbles from falling into the hole due to the flowability of the hole wall soil.

[0057] Of course, in order to improve the supporting force of the cylindrical lattice truss 6, at least one supporting group is arranged on the cylindrical lattice truss 6. The supporting group can be two groups, three groups, or multiple groups. When there are multiple groups, the multiple supporting groups are arranged along the axial direction of the cylindrical lattice truss 6. The supporting group includes an even number of fixed blocks 14 and an elastic supporting piece 16 between every two fixed blocks 14. The fixed block 14 is arc-shaped with the same center as the cylindrical lattice truss 6, and a sliding groove 15 concentric with the cylindrical lattice truss 6 is arranged in the fixed block 14. Two adjacent fixed blocks 14 form a group. For example, if there are four fixed blocks 14, they are divided into two groups. The number of groups of fixed blocks 14 is half the number of fixed blocks 14. The two sliding grooves 15 of the fixed blocks 14 in the same group slide through the elastic supporting piece 16. A plurality of reverse ratchets 17 are symmetrically arranged at the two ends of the lower side of the elastic supporting piece 16. A ratchet pawl 18 matched with the ratchet 17 is arranged in the fixed block 14. The cooperation of the ratchet pawl 18 and the ratchet 17 makes the two fixed blocks 14 only move away from each other, but not move closer to each other. When the cylindrical lattice truss 6 is expanded by the air bag 5, the elastic supporting piece 16 deforms and moves in the sliding groove 15. When the cylindrical lattice truss 6 is supported in place, the cooperation of the ratchet 17 and the ratchet pawl 18 prevents the two adjacent fixed blocks 14 from moving closer to each other, so that the elastic supporting piece 16 supports the cylindrical lattice truss 6. The fixed block 14 can be fixed at the lattice node of the cylindrical lattice truss 6. Through the cooperation of the fixed block 14 and the elastic supporting piece 16 arranged on the cylindrical lattice truss 6, and through the ratchet pawl 18 and the ratchet 17, the supporting mechanism prevents the cylindrical lattice truss 6 from being reduced again. The size of the expansion is determined by the air bag 5. The expansion of the cylindrical lattice truss 6 being passive realizes that the cylindrical lattice truss 6 can be expanded and positioned at the corresponding position after being expanded by the air bag 5, and has strong adaptability and compatibility.

[0058] Preferably, in order to prevent the groundwater in the loose rock-soil body from diluting the slurry in the hole or the slurry from leaking out of the hole, an elastic waterproof layer 19 is wrapped around the outer circumference of the cylindrical net rack 6, which functions as a water barrier. When the cylindrical net rack 6 expands, the elastic waterproof layer 19 is elastic and can expand along with the cylindrical net rack 6. The elastic waterproof layer 19 can be made of elastic rubber material. The elastic waterproof layer 19 can prevent the groundwater in the geological body from seeping into the hole to dilute the concentration of the slurry in the hole, and can also prevent the slurry of the hole wall from flowing into the loose geological body to cause slurry leakage. Therefore, in the technical process of preventing the exchange between the loose geological body and the slurry in the hole, the stability of the hole wall is further improved. The elastic waterproof layer 19 can also be arranged on the inner side of the cylindrical net rack. When the waterproof layer is arranged on the outer side of the cylindrical net rack and is provided with the fixing block 14, a hole matched with the fixing block is dug in the waterproof layer, and the fixing block 14 is fixed on the cylindrical net rack 6 through the elastic waterproof layer 19.

[0059] The air bag 5 in the present application is columnar in shape, and the hollow part in the middle passes through the support pipe 4. The air pipe of the air bag 5 can pass through the support pipe 4 to be connected to the external air pressure control device. The air pressure control device is used to inflate and deflate the air bag 5.

[0060] In the present application, in order to facilitate the smooth movement of the air bag 5 from the support pipe 4 and to be sleeved on the air bag 5, a first slope 9 is arranged on the support pipe 4. The first slope 9 is located on the side of the air bag 5 away from the drill bit 2. The highest part of the first slope 9 is higher than the height of the air bag 5 in the initial state. The first slope 9 is conical in shape, and the center through hole of the conical body is sleeved on the support pipe 4. When the cylindrical net rack 6 is pushed to move towards the air bag 5, the cylindrical net rack 6 first contacts the first slope 9. Under the guidance of the first slope 9, the cylindrical net rack 6 continuously moves towards the air bag 5 until the cylindrical net rack 6 is sleeved on the air bag 5, and the pushing of the cylindrical net rack 6 is stopped.

[0061] In the invention, when drilling downward in a gravel geologic body, the cylindrical net rack 6 of the invention can be moved onto the air bag 5 in turn by gravity, but when the drilling inclination is low or the hole is horizontal, a pushing device is needed. The pushing device in the invention is a pushing-in cylinder 10 which is movable and placed between the support pipe 4 and the protective cylinder 11. A first pushing mechanism is arranged outside the pushing-in cylinder 10. The first power telescopic rod 23 of the first pushing mechanism can be an electric push rod or a hydraulic rod or an air pressure rod to push the cylindrical net rack 6. The first pushing mechanism pushes the cylindrical net rack 6 into the air bag 5 through the pushing-in cylinder 10. The pushing-in distance of the hydraulic rod or the like can be calculated in advance according to its length, the position of the air bag 5 and the length of the cylindrical net rack 6. Or a micro camera or micro cameras are embedded in the protective cylinder 11 around the air bag 5 to observe the movement and state of each part inside the protective cylinder 11. As a preferred embodiment, there are two first pushing mechanisms symmetrically arranged on both sides of the tail end of the pushing-in cylinder 10. The first pushing mechanism comprises a first slide 21 fixed on a mounting block 20, two first sliding blocks 22 slidingly connected in the first slide 21, a first power telescopic rod 23 fixed on the two first sliding blocks 22, a first rack 24 opened in the first slide 21, a first electromagnetic push rod 25 fixed on one of the first sliding blocks 22, and a first pawl 26 fixed on the end of the first electromagnetic push rod 25 and cooperating with the first rack 24. The movable rod part of the first power telescopic rod 23 is connected to the tail of the pushing-in cylinder 10, and the cylinder part of the first power telescopic rod 23 is fixed on the two first sliding blocks 22. In the first pushing mechanism, the first power telescopic rod 23 is arranged in the first slide 21, so that when the length of the first power telescopic rod 23 is not enough, the first pawl 26 can be lifted by the first electromagnetic push rod 25 to disengage from the first rack 24, and then the first power telescopic rod 23 can be moved forward as a whole to compensate for its length, solving the problem that the length of the first power telescopic rod 23 is not enough when the hole is long. After the first power telescopic rod 23 is pushed to the position, the first pawl 26 is lowered by the first electromagnetic push rod 25 to engage in the first rack 24, positioning the cylinder part of the first power telescopic rod 23, facilitating the first power telescopic rod 23 to drive the forward movement of the pushing-in cylinder 10. At least one first pressure sensor can be embedded on the circumference of the second slope 12, with the surface of the pressure sensor flush with the surface of the slope. When the pushing-in cylinder 10 moves and pushes the cylindrical net rack 6 forward, the pressure sensor works at this time. When the cylindrical net rack 6 contacts the first pressure sensor, it is detected that the cylindrical net rack is pushed into position, and then the pushing-in cylinder 10 stops the pushing operation. The first pressure sensor facilitates the detection of the pushing of the cylindrical net rack into position.Preferably, a spring plunger 40 can be added into the push-in barrel 10, and an arc-shaped groove 41 can be opened on the support tube 4 at the corresponding position. When the push-in barrel 10 reaches the working position close to the air bag, the spring plunger 40 is clamped into the arc-shaped groove 41. A contact sensor can be installed in the arc-shaped groove 41. When the spring plunger 40 is clamped into the arc-shaped groove 41, the contact sensor can transmit information to the controller. The controller can prompt the contact sensor to detect the spring plunger 40 through the display or the loudspeaker. When the drill bit 2 drills, the first electromagnetic push rod 25 rises at this time. Then, because the spring plunger 40 is in the arc-shaped groove 41, the drill rod 1 advances with the push-in barrel 10 through the support tube 4. When it advances to the position, the first electromagnetic push rod 25 is lowered, the first pawl 26 is clamped into the first rack 24, and then the first power telescopic rod 23 pushes the push-in barrel 10. At this time, because of the power of the first power telescopic rod 23, the plunger in the spring plunger 40 overcomes the spring force and retracts. At this time, the push-in barrel 10 is normally pushed forward. When it is needed to retreat the push-in barrel 10, the plunger overcomes the spring force to retract through the power of the first power telescopic rod 23, so that the push-in barrel 10 can normally retract. However, the clamping force between the spring plunger 40 and the arc-shaped groove 41 is sufficient to drive the push-in barrel 10 to drill with the drill rod 1.

[0062] As shown in Figure 5 and Figure 8 In the present application, in order to protect the air bag 5 and the barrel-shaped net rack 6 from being damaged by excessive sand and fine particles, a protective barrel 11 is sleeved outside the air bag 5 and the barrel-shaped net rack 6. The outer diameter of the protective barrel 11 is smaller than the hole diameter drilled by the drill bit 2. The rear part of the protective barrel 11 is connected to the second advancing mechanism. The second advancing mechanism can be an electric push rod or a hydraulic rod or a pneumatic rod to move the protective barrel 11 forward and backward. A second pressure sensor can be added between the second advancing mechanism and the protective barrel 11. When the protective barrel 11 touches the support plate 3, the pressure sensor detects the increase in pressure, and then the advancing of the protective barrel 11 can be stopped. In order to increase the stability of the protective barrel 11, a ring-shaped magnet piece 13 can be embedded on the side of the support plate 3 facing the protective barrel 11. The end of the protective barrel 11 facing the ring-shaped magnet piece 13 is made of ferromagnetic material, so that when the protective barrel 11 touches the support plate 3, the end of the protective barrel 11 can be attracted by the ring-shaped magnet piece 13, forming the effect that both ends of the protective barrel 11 are supported (the rear end of the protective barrel 11 is supported by the second advancing mechanism, and the front end is supported by the ring-shaped magnet piece 13). The ring-shaped magnet piece 13 is embedded in the support plate 3 and flush with the side of the support plate 3. After the protective barrel 11 is attracted by the ring-shaped magnet piece 13, it can drill with the drill rod 1. Preferably, the ring-shaped magnet piece 13 is an electromagnet ring. The use of the electromagnet ring can provide greater magnetic force, and when it is needed to be separated, it only needs to be powered off.

[0063] Since the protection cylinder 11 needs to protect the drilling pipe 1 from drilling, and the front end of the protection cylinder 11 is sucked on the annular magnet piece 13 of the support plate 3, when the drilling pipe 1 advances with the support plate 3, the protection cylinder 11 will also advance, so at this time the second advancing mechanism needs to advance with the protection cylinder 11, as preferred, the second advancing mechanism has two, which are symmetrically arranged on both sides of the tail end of the protection cylinder 11. The second advancing mechanism includes a second sliding rail 27 fixed on the mounting block 20, two second sliding blocks 28 slidingly connected in the second sliding rail 27, a second power telescopic rod 29 fixed on the two second sliding blocks 28, a second rack 30 opened in the second sliding rail 27, a second electromagnetic push rod 31 fixed on one of the second sliding blocks 28, and a second pawl 32 fixed on the end of the second electromagnetic push rod 31 and matched with the second rack 30. The movable rod part of the second power telescopic rod 29 is connected to the tail of the protection cylinder 11, and the cylinder part of the first power telescopic rod 23 is fixed on the two second sliding blocks 28. On the second advancing mechanism, the second power telescopic rod 29 is arranged in the second sliding rail 27, so that when the protection cylinder 11 follows the drilling pipe 1 to drill, the second pawl 32 can be lifted by the second electromagnetic push rod 31 to disengage from the second rack 30, then the protection cylinder 11 can move forward as a whole with the second power telescopic rod 29, and the length thereof is compensated. When the second power telescopic rod 29 is pushed to the position, the second pawl 32 is lowered by the second electromagnetic push rod 31 to engage in the second rack 30, and the cylinder part of the second power telescopic rod 29 is positioned, which facilitates the second power telescopic rod 29 to drive the forward and backward movement of the protection cylinder 11, and further exposes and covers the air bag 5. The mechanism of the protection cylinder 11 is arranged so that the protection cylinder 11 has strong following property to the drilling pipe 1, can advance with the drilling pipe 1, and further protects the air bag 5 and the cylindrical net rack 6.

[0064] To facilitate the protective cylinder 11 moving towards the support plate 3, and to ensure that the protective cylinder 11 can keep coaxial with the support pipe 4 after moving to abut against the support plate 3, a second slope 12 is arranged on the support pipe 4 between the air bag 5 and the support plate 3, the second slope 12 is conical, and the outer diameter of the second slope 12 gradually increases towards the support plate 3. The second slope 12 can be composed of an inclined part and a horizontal part, that is, composed of a conical cylinder and a circular cylinder, the circular cylinder is connected to the end of the conical cylinder with larger diameter and has an equal outer diameter with the end of the conical cylinder with larger diameter. When it is needed to expose the air bag 5 partially, the second propulsion mechanism is started to move the protective cylinder 11 backwards, at this time, the protective cylinder 11 retreats against the attraction of the annular magnet piece 13, and after the air bag 5 is exposed, the air bag 5 is inflated to support the cylindrical net rack 6 on the air bag 5 into the hole wall, and then the air bag 5 is retracted. After that, the second propulsion mechanism is started to move the protective cylinder 11 forward, the protective cylinder 11 passes through the guide of the second slope 12 to ensure that the axis of the protective cylinder 11 is concentric with the support pipe 4, and then the protective cylinder 11 abuts against the support plate 3 and is attracted by the annular magnet piece 13 on the support plate 3. Preferably, the support plate 3 is a circular plate with a hole in the middle, and is fixed on the drill pipe 1 through a bearing in the middle hole. The outer diameter of the protective cylinder 11 is smaller than the outer diameter of the support plate 3.

[0065] As shown in Figures 1-4 The one end of the hole forming platform 34 is rotatably connected to the hole forming carrier 33, one end of the hydraulic cylinder 42 is rotatably connected to the middle part of the hole forming platform 34, the other end of the hydraulic cylinder 42 is rotatably connected to the hole forming carrier 33, the slide rail 35 extending along the length direction of the hole forming platform 34 is arranged on the hole forming platform 34, the mounting block 20 is slidably connected to the slide rail 35, the linear displacement driving structure driving the mounting block 20 to displace along a straight line is arranged on the hole forming platform 34, the linear displacement driving structure includes the linear driving motor 36, the linear driving motor 36 is connected to the linear driving lead screw 37, the linear driving lead screw 37 is rotatably connected to the hole forming platform 34, the linear driving lead screw 37 is threadedly connected to the mounting block 20, the rotating driving motor 38 is fixed to the mounting block 20, the rotating driving motor 38 is connected to the drill pipe 1 through a gear set to drive the drill pipe 1 to rotate. In specific use, the angle of the hole forming platform 34 can be adjusted by starting the hydraulic cylinder 42, and then the angle of the drill pipe 1 relative to the hole forming platform is adjusted to drill holes with different angles. After the hole forming angle is set, the linear driving motor 36 and the rotating driving motor 38 are started to perform hole forming action.

[0066] The outer ends of the first propulsion mechanism and the second propulsion mechanism are both mounted on the mounting block 20.

[0067] As shown in Figure 16As shown, the construction method of one embodiment of the present application in the construction process, this embodiment is the embodiment without installing the protection cylinder 11, drilling in the gravel geologic body, after drilling a distance, the drill rod 1 stops, the first propulsion mechanism moves the frontmost cylinder-shaped net rack 6 to the air bag 5 through the push-in cylinder 10, then inflates the air bag 5, the air bag 5 expands to drive the cylinder-shaped net rack 6 to stand up, until the air bag 5 stands up the cylinder-shaped net rack 6 to support the hole wall, at this time, the air bag 5 stops expanding and starts to deflate, until the air bag 5 returns to the original state, and the cylinder-shaped net rack 6 is supported on the hole wall, then the drill rod 1 continues to drill forward, after drilling a distance, the drill rod 1 stops, the first propulsion mechanism moves the head cylinder-shaped net rack 6 to the air bag 5 again through the push-in cylinder 10, and then the air bag 5 drives the cylinder-shaped net rack 6 to stand up to make the hole wall, then continues to drill, and repeats the above actions until the drilling is completed.

[0068] The construction method of another embodiment of the present application in the construction process, this embodiment is the embodiment with the installation of the protection cylinder 11, the rear end of the drill rod 1 is connected to the driving mechanism, drilling in the gravel geologic body, after drilling a distance, the drill rod 1 stops, the frontmost cylinder-shaped net rack 6 is moved to the air bag 5, then the protection cylinder 11 is retreated by one station, and the front cylinder-shaped net rack 6 is exposed;

[0069] Then the air bag 5 is inflated, the air bag 5 expands to drive the cylinder-shaped net rack 6 to stand up, until the air bag 5 stands up the cylinder-shaped net rack 6 into the hole wall, so that the cylinder-shaped net rack 6 supports the hole wall, at this time, the air bag 5 stops expanding and starts to deflate, until the air bag 5 returns to the original state, then the protection cylinder 11 advances by one station until it touches the support plate 3;

[0070] Then the drill rod 1 continues to drill forward, after drilling a distance, the drill rod 1 stops, the protection cylinder 11 is moved again, the cylinder-shaped net rack 6 is driven by the air bag 5 to stand up to make the hole wall, then continues to drill, and repeats the above actions until the drilling is completed.

[0071] The application sets the above-mentioned embodiment structure, and supports the hole wall by the inflatable air bag 5 driving the self-keeping cylindrical net rack 6, which is fast and efficient, and the cylindrical net rack 6 is connected by multiple connecting pieces 7 with easy folding marks 8, so that multiple work stations in the hole drilling process can be supported by the air bag 5 to support the hole wall continuously and repeatedly. The application is mainly applied to the geological working conditions with strong fluidity such as sand and gravel geological bodies. After drilling a certain distance, the cylindrical net rack 6 is supported by the inflatable air bag 5, and the hole wall is supported by the cylindrical net rack 6 to prevent the loose sand and gravel from falling into the hole. Especially after adding a layer of waterproof cloth, the underground water in the loose rock-soil body of the hole wall is prevented from diluting the slurry in the hole or leaking, and the stability of the hole wall is also enhanced. The multiple cylindrical net racks 6 are arranged in sequence, and can be supported in multiple work stations of the formed hole. The cylindrical net rack 6 is a part to be supported, and multiple cylindrical net racks 6 are supported by the air bag 5, so that one power mechanism can continuously support multiple continuously fed cylindrical net racks 6. After the cylindrical net rack 6 is supported, it is self-locked to the current position to support the hole wall.

Claims

1. A hole-forming device for root piles in gravel geological formations, comprising a hole-forming machine carrier (33), wherein the hole-forming machine carrier (33) has an adjustable-angle hole-forming platform (34), a slide rail (35) is provided on the hole-forming platform (34), an mounting block (20) is slidably connected to the slide rail (35), a linear displacement drive mechanism is provided on the hole-forming platform (34) to drive the mounting block (20) to move along a linear displacement, a drill rod (1) is rotatably connected inside the mounting block (20), a rotary drive mechanism is connected to the rear end of the drill rod (1), and a drill bit (2) is installed at the head of the drill rod (1), characterized in that, include, Support plate (3), which is rotatably connected to drill rod (1), and the installation position of support plate (3) is close to drill bit (2); Support tube (4), the support tube (4) is fixed on the side of the support plate (3) facing away from the drill bit (2), the support tube (4) is sleeved on the drill rod (1), and the drill rod (1) can rotate relative to the support tube (4); Airbag (5), the airbag (5) is sleeved on the support tube (4), the airbag (5) is located on the support tube (4) near the support plate (3); A cylindrical mesh frame (6) is provided. There are multiple cylindrical mesh frames (6). Multiple cylindrical mesh frames (6) are connected end to end along the axial direction through a connector (7). The connector (7) is provided with a folding crease (8). The cylindrical mesh frame (6) is sleeved on the support tube (4). The cylindrical mesh frame (6) located at the head can be movably sleeved on the airbag (5). When the airbag (5) is inflated, the cylindrical mesh frame (6) can be opened and broken off from the folding crease (8) to support the hole wall.

2. The device for drilling tree root piles in gravelly geological formations according to claim 1, characterized in that, The airbag (5) has a first ramp (9) on the support tube (4) on the side facing away from the support plate (3). The highest point of the first ramp (9) is higher than or equal to the height of the airbag (5) when it is not inflated. The first ramp (9) is used to guide the cylindrical mesh frame (6) onto the airbag (5).

3. The device for drilling tree root piles in gravelly geological formations according to claim 1, characterized in that, It also includes a pusher tube (10), which can be fitted onto the support tube (4) and is used to push the cylindrical grid (6) toward the drill bit (2).

4. The device for drilling tree root piles in gravelly geological formations according to claim 1, characterized in that, It also includes a protective cylinder (11), which encloses the cylindrical mesh frame (6) and the airbag (5) inside. A second ramp (12) is provided on the support tube (4) between the airbag (5) and the support plate (3). The second ramp (12) is conical and has an installation hole inside. The installation hole is fitted onto the support tube (4). The second ramp (12) is used to guide the protective cylinder (11).

5. The device for drilling tree root piles in gravelly geological formations according to claim 4, characterized in that, The support plate (3) has an embedded annular magnet (13) on the side facing the airbag (5). The second ramp (12) is placed within the annular range of the annular magnet (13). The end of the protective cylinder (11) facing the annular magnet (13) is made of ferromagnetic material. The annular magnet (13) is used to hold the protective cylinder (11).

6. The device for drilling tree root piles in gravelly geological formations according to claim 1, characterized in that, The grid units of the cylindrical space frame (6) are parallelograms.

7. The device for drilling tree root piles in gravelly geological formations according to claim 1, characterized in that, At least one set of support groups is axially arranged on the cylindrical mesh frame (6). The support group includes an even number of fixed blocks (14) fixed in a circular shape on the cylindrical mesh frame (6). The fixed blocks (14) have sliding grooves (15) with the same center as the cylindrical mesh frame (6). Two adjacent sliding grooves (15) are slidably connected to elastic support plates (16). The inner sides of the elastic support plates (16) are evenly distributed with ratchet teeth (17) facing opposite directions along their circumference. The sliding grooves (15) are provided with pawls (18) that cooperate with the ratchet teeth (17). When the cylindrical mesh frame (6) is opened, the pawls (18) can move on the ratchet teeth (17) when the adjacent fixed blocks (14) are relatively far apart. The structure of the pawls (18) and ratchet teeth (17) prevents the adjacent fixed blocks (14) from getting close to each other.

8. The device for drilling tree root piles in gravelly geological formations according to claim 1, characterized in that, The cylindrical mesh frame (6) is wrapped with an elastic waterproof layer (19).

9. A method for forming holes using the root pile hole-forming device for gravelly geological bodies as described in claim 1, characterized in that, The root pile has a main pile and a trunk pile connected to the main pile, the trunk pile being inclined downwards along the interior direction of the main pile; the process of drilling a hole for the root pile is as follows: Step 1: Drill the main pile hole. Adjust the drilling angle through the drilling platform (34) and adjust the drill rod (1) to the drilling posture of the main pile hole. Then start the linear displacement drive mechanism and the rotary drive mechanism to drill the gravel geological body. After drilling a certain distance, the drill rod (1) stops and moves the cylindrical grid (6) at the front to the air bag (5). Then inflate the air bag (5). The expansion of the air bag (5) drives the cylindrical grid (6) to be supported until the air bag (5) supports the cylindrical grid (6) into the hole wall. At this time, the air bag (5) stops expanding and begins to deflate and retract until the air bag (5) returns to its original state. Then the drill rod (1) continues to drill forward. After drilling a certain distance, the action of supporting the cylindrical grid (6) with the air bag (5) to form the hole wall is performed again. Then the drilling continues. Repeat the above actions until the drilling is completed. Step 2: Drill holes for the tree trunk piles. Adjust the drilling angle using the drilling platform (34), and adjust the drill rod (1) to the drilling posture for the tree trunk pile holes. Then, start the linear displacement drive mechanism and the rotary drive mechanism to drill the gravel geological body. After drilling a certain distance, the drill rod (1) pauses and moves the cylindrical mesh frame (6) at the front to the air bag (5). Then, inflate the air bag (5). The expansion of the air bag (5) drives the cylindrical mesh frame (6) to be supported until the air bag (5) supports the cylindrical mesh frame (6) into the hole wall. At this time, the air bag (5) stops expanding and begins to deflate and retract until the air bag (5) returns to its original state. Then, the drill rod (1) continues to drill. After drilling a certain distance, the operation of supporting the cylindrical mesh frame (6) and stabilizing the hole wall with the air bag (5) is performed again. Then, continue drilling and repeat the above actions until the drilling is completed.

10. A method for forming holes using the root pile hole-forming device for gravelly geological bodies as described in claim 4, characterized in that, The tree root pile has a main pile and branch piles connected to the main pile, the branch piles being inclined downwards along the interior direction of the main pile; the process of drilling the pile hole for this tree root pile is as follows: Step 1: Drill the main pile hole. Adjust the drilling angle using the drilling platform (34), and adjust the drill rod (1) to the drilling posture of the main pile hole. Then, start the linear displacement drive mechanism and the rotary drive mechanism to drill the gravel geological body. After drilling a certain distance, pause the drill rod (1), move the foremost cylindrical grid (6) onto the airbag (5), and then move the protective cylinder (11) back one position to expose the front cylindrical grid (6). Then inflate the airbag (5). The expansion of the airbag (5) will lift the cylindrical mesh frame (6) until the airbag (5) supports the cylindrical mesh frame (6) and stabilizes the hole wall. At this time, the airbag (5) stops expanding and begins to deflate and retract until the airbag (5) returns to its original state. Then advance the protective cylinder (11) one position until it touches the support plate (3). Then the drill rod (1) continues to drill forward. After drilling a certain distance, the protective cylinder (11) moves again and the airbag (5) supports the cylindrical mesh frame (6) to support the hole wall. Then the drilling continues. The above actions are repeated until the drilling is completed. Step 2: Drill holes for the branch piles. Adjust the drilling angle using the drilling platform (34), adjust the drill rod to the drilling posture of the branch pile hole, and then start the linear displacement drive mechanism and the rotary drive mechanism to drill holes in the gravel geological body. After drilling a certain distance, the drill rod (1) is paused, and the cylindrical mesh frame (6) at the front is moved onto the airbag (5). Then the protective cylinder (11) is moved back one position to expose the front cylindrical mesh frame (6). Then inflate the airbag (5). The expansion of the airbag (5) will lift the cylindrical mesh frame (6) until the airbag (5) lifts the cylindrical mesh frame (6) into the hole wall. At this time, the airbag (5) stops expanding and begins to deflate and retract until the airbag (5) returns to its original state. Then advance the protective cylinder (11) one station until it touches the support plate (3). Then the drill rod (1) continues to drill forward. After drilling a certain distance, the protective cylinder (11) moves again and the cylindrical mesh frame (6) is supported by the airbag (5) to support the hole wall. Then the drilling continues and the above actions are repeated until the drilling is completed.

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