An apparatus, system and method for T-pile construction

Abstract

The application discloses a kind of equipment, system and method for T pile construction, solve the problem that the construction of T pile in prior art needs multiple equipment to be repeatedly withdrawn in turn and then work, with the beneficial effect of improving work efficiency, specific scheme is as follows: a kind of equipment for T pile construction, including bearing platform, rotatable installation is in vehicle frame;Drilling mechanism, installed in bearing platform, drilling mechanism includes power head, power head is detachably connected with auger stem, auger stem is hollow and bottom is provided with drill bit, drill bit can be opened relative to auger stem, internal grouting passage is arranged in the side wall of auger stem, internal grouting passage is arranged through auger stem, the outer diameter of auger stem is large from top to bottom;Steel cage hoisting mechanism, installed in vehicle frame, after power head and auger stem are separated, steel cage hoisting mechanism can be lifted to be placed into auger stem inside after rotating setting angle in bearing platform.

Description

Technical Field

[0001] This invention relates to the field of foundation construction technology, and in particular to a device, system and method for T-pile construction. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] In foundation engineering, T-shaped piles are increasingly used in various building foundations and support projects due to their enlarged superstructure, which significantly improves bearing capacity and pull-out resistance. Existing long spiral drilling rigs are mainly used for conventional cast-in-place pile construction; drilling, hole enlargement, and reinforcement cage lowering are typically completed by different equipment or in stages, making it difficult to form a continuous construction process.

[0004] In T-pile construction, multiple sets of equipment are usually used, such as drilling equipment, hole reaming device, steel cage lowering equipment, and grouting equipment. First, the drilling equipment forms a hole with the same diameter at the top and bottom. Then, a secondary hole reaming or a special hole reaming device is used to form an enlarged head structure. The drill rod is then lifted, and the steel cage is lowered using the steel cage lowering device. Finally, grouting is performed using the grouting equipment. This process requires multiple pieces of equipment to be deployed and operated in sequence to complete the T-pile construction. In order to achieve sequential operation, the next piece of equipment needs to be replaced after the previous one finishes working, which makes the overall process complicated. Furthermore, during the grouting process, due to the fixed structure of the drill bit, the steel cage can only be lowered after the drill rod is lifted. In addition, the lowering of the reinforcing cage after raising the drill rod does not protect the borehole wall, so the lowering process can easily cause disturbance to the borehole wall or even collapse. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the purpose of this invention is to provide a device for T-shaped pile construction that enables drilling, hole enlargement, lowering of the reinforcing cage, and simultaneous grouting.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: An apparatus for T-pil construction, comprising: The support platform can be rotatably mounted on the vehicle frame; The drilling mechanism is installed on the support platform. The drilling mechanism includes a power head, which is detachably connected to the spiral drill rod. The spiral drill rod is hollow and has a drill bit at the bottom. The drill bit can be opened relative to the spiral drill rod. An internal grouting channel is provided on the side wall of the spiral drill rod. The internal grouting channel runs through the spiral drill rod. The outer diameter of the spiral drill rod is larger at the top and smaller at the bottom. The rebar cage hoisting mechanism is installed on the vehicle frame. After the power head is separated from the auger drill rod, the rebar cage hoisting mechanism can be raised and lowered to place the rebar cage into the auger drill rod after the bearing platform rotates at a set angle.

[0007] As described above, in a device for T-pile construction, the power head is detachably connected to the top of the auger drill rod via a locking sleeve. A locking component is provided inside the locking sleeve and is arranged along the radial direction of the locking sleeve. A recess is provided at the top of the auger drill rod, and the locking component can be fitted onto the circumferential top of the auger drill rod. The inner diameter of the locking component can be increased or decreased to engage the locking component with the recess of the auger drill rod.

[0008] As described above, in a device for T-pile construction, the locking sleeve is hollow inside, and a grouting hole is provided at the top of the locking sleeve. The grouting hole is connected to the internal grouting channel, and a sealing element is provided at the grouting hole. The internal grouting channel is provided in multiple places, and the grout outlet at the bottom of the internal grouting channel faces the hollow part inside the auger drill rod.

[0009] As described above, in a device for T-pil construction, the spiral drill rod has spiral blades arranged circumferentially, and the drill bit is arranged at the bottom end of the spiral blades. The drill bit is rotatably connected to the spiral drill rod so that the drill bit separates from the spiral drill rod when the spiral blades are lifted.

[0010] As described above, the device for T-pile construction includes a drill bit comprising a support plate, with multiple drill teeth at one end of the support plate away from the auger rod. The sum of the length of the drill teeth and the outer diameter of the bottom end of the auger rod is less than the minimum inner diameter of the auger blade.

[0011] As described above, the equipment for T-pile construction has two arc-shaped claws at one end of the frame, and a multi-directional motion mechanism is installed inside the frame. The multi-directional motion mechanism is connected to the arc-shaped claws, and the multi-directional motion mechanism drives the arc-shaped claws to move to hold the auger rod. The vehicle frame is also equipped with a chassis running mechanism, and the power head, the steel cage hoisting mechanism, the chassis running mechanism, and the multi-directional motion mechanism are each individually connected to the control unit.

[0012] As described above, the equipment for T-pile construction includes a steel cage hoisting mechanism comprising a base, a longitudinal groove on the base, a segmented telescopic arm at the top of the groove, each segment of the telescopic arm being an arc-shaped structural member to reserve space for the steel cage, a hook on the topmost segment of the telescopic arm, a telescopic power source connected to the topmost segment of the telescopic arm, and the telescopic power source being fixed inside the bottommost segment of the telescopic arm.

[0013] As described above, in a device for T-pil construction, the steel cage hoisting mechanism is positioned opposite to the auger drill rod at the vehicle frame; The frame supports the mast and the power head lifting mechanism. The wire rope of the power head lifting mechanism passes through the top of the mast and is connected to the power head.

[0014] Secondly, the present invention also provides a system for T-pile construction, including a grouting mechanism and the aforementioned equipment for T-pile construction. The grouting mechanism includes a grouting pipe that passes through the power head and communicates with the internal grouting channel.

[0015] Thirdly, the present invention also provides a method for constructing T-shaped piles, including the equipment for constructing T-shaped piles as described in any one of the claims, as follows: The power head is connected to the auger drill rod. Under the action of the rotation of the power head and the axial downward pressure, the drill bit closes and drills downward into the soil, forming a variable diameter borehole with a larger top and a smaller bottom. Once the borehole reaches the predetermined depth, drilling is stopped, and the connection between the power head and the auger is disconnected. While the equipment is drilling, the steel cage is welded in sections behind the equipment and lifted by the steel cage hoisting mechanism. The rotating platform causes the steel cage hoisting mechanism to rotate to a position directly above the drilling hole. The steel cage hoisting mechanism lowers the steel cage along the hollow part of the spiral drill rod to the predetermined position inside the hole; The rotation of the support platform causes the power head to rotate above the auger drill rod, reconnecting the power head and the drill rod. Grout is then delivered through the internal grouting channel and injected into the borehole through the bottom of the auger drill rod. The auger drill rod is lifted by the power head. After losing axial pressure, the drill bit opens outward under its own weight, eventually forming a T-shaped pile body that encloses the steel cage.

[0016] The beneficial effects of the present invention are as follows: The equipment provided by this invention includes a support platform, a drilling mechanism, and a rebar cage hoisting mechanism. The outer diameter of the auger drill rod is larger at the top and smaller at the bottom, forming a hole structure with a larger top and smaller bottom by using a variable diameter drill rod to meet the requirements for T-shaped pile forming. The support platform can drive the drilling mechanism and the rebar cage hoisting mechanism to rotate. Drilling is performed first by the drilling mechanism. The power head and the auger drill rod are detachable. After separation, the rebar cage hoisting mechanism is rotated to a position above the borehole to lower the rebar cage. After the rebar cage is lowered, the drilling mechanism is rotated back to a position above the borehole to connect the auger drill rod to the power head. After connection, the auger drill rod can be drilled... The drilling process involves lifting the drill rod and using an internal grouting channel to achieve continuous sealed grouting during the lifting process. This allows for the construction of T-shaped piles without the need for repeated equipment changes, saving construction time. Because the drill bit can be opened relative to the auger rod, it will not interfere with the lifting of the auger rod. In other words, the drill bit closes during drilling and automatically opens when the drill rod is lifted. This allows the auger rod to be kept in place while the reinforcing cage is lowered, preventing hole collapse. Then, the auger rod can be lifted, as the drill bit can be separated from the auger rod, allowing for drilling and avoiding the reinforcing cage being pulled during the lifting process. Attached Figure Description

[0017] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0018] Figure 1 This is a schematic diagram of a device for T-pile construction according to one or more embodiments of the present invention.

[0019] Figure 2 This is a schematic diagram of a drill bit in a device for T-pile construction according to one or more embodiments of the present invention.

[0020] Figure 3 This is an enlarged schematic diagram of the connection mechanism between the auger drill rod and the power head in a device for T-pile construction according to one or more embodiments of the present invention.

[0021] Figure 4 This is a schematic diagram of a steel cage hoisting mechanism in a device for T-pile construction according to one or more embodiments of the present invention.

[0022] Figure 5 This is a schematic diagram of the locking component inside the locking sleeve of a device for T-pile construction according to one or more embodiments of the present invention, from an unlocked state to a locked state.

[0023] Figure 6 This is a schematic diagram of a device for T-pil construction according to one or more embodiments of the present invention during the drilling process.

[0024] Figure 7 This is a schematic diagram of a device for T-pil construction according to one or more embodiments of the present invention during the lowering of a steel reinforcement cage.

[0025] Figure 8 This is a schematic diagram of an apparatus for T-pil construction according to one or more embodiments of the present invention after the spiral drill rod is lifted.

[0026] The diagram exaggerates the spacing or dimensions between parts to show their positions; the diagram is for illustrative purposes only.

[0027] The components are as follows: 1-Drill bit, 2-Hinged shaft, 3-Auger drill rod, 4-Auger blade, 5-Splined sleeve, 6-Internal grouting channel, 7-Grouting hole, 8-Grouting pipe, 9-Seal, 10-Bearing step, 11-Locking sleeve, 12-Drive motor, 13-Splined shaft, 14-Power head, 15-Power head wire rope, 16-Power head lifting mechanism, 17-Mast, 18-Luffing cylinder, 19-Engine, 20-Hydraulic pump, 21-Bearing platform, 22-Slewing mechanism, 23-Chassis walking mechanism, 24-Drive wheel, 25-Driven wheel, 26-Operator's cab, 27-Rebar cage hoisting wire rope, 28-Rebar cage hoisting mechanism, 29-Sectional telescopic boom, 30-Hook, 31-Telescopic drive cylinder, 32-Base, 33-Arc-shaped chuck, 34-Telescopic component, 35-Frame, 36-Drill teeth. Detailed Implementation

[0028] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0029] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, unless otherwise expressly indicated by the invention, the singular form is also intended to include the plural form. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof. As described in the background section, the construction of T-shaped piles in the prior art requires multiple pieces of equipment to be repeatedly removed from the site before work can begin. In order to solve the above-mentioned technical problem, this invention proposes a device for the construction of T-shaped piles.

[0030] Example 1 In a typical embodiment of the present invention, reference is made to Figure 1 As shown, a device for T-pil construction includes: The support platform 21 is rotatably mounted on the vehicle frame 35; The drilling mechanism is installed on the support platform 21. The drilling mechanism includes a power head 14, which is detachably connected to the spiral drill rod 3. The spiral drill rod 3 is hollow and has a drill bit 1 at the bottom. The drill bit 1 can be opened relative to the spiral drill rod 3. An internal grouting channel 6 is provided on the side wall of the spiral drill rod 3. The internal grouting channel 6 runs through the spiral drill rod 3. The outer diameter of the spiral drill rod 3 is larger at the top and smaller at the bottom. The rebar cage hoisting mechanism 28 is installed on the frame 35. After the power head 14 is separated from the auger drill rod 3, the rebar cage hoisting mechanism 28 can be raised and lowered to place the rebar cage into the auger drill rod 3 after the bearing platform 21 is rotated at a set angle.

[0031] It should be noted that the chassis 35 is equipped with a chassis travel mechanism 23, which is an existing tracked travel mechanism. The tracked travel mechanism includes tracks, which are supported by a drive wheel 24 and a driven wheel 25, and drive the rotation of the tracks. The chassis 35 is equipped with a slewing mechanism 22, which is a slewing bearing. The chassis 35 is connected to the load-bearing platform 21 through the slewing bearing. The load-bearing platform 21 has a set load-bearing capacity. Specifically, the load-bearing platform 21 is a flat plate with a set thickness, and the size of the load-bearing platform 21 is adapted to the size of the chassis 35. The outer ring of the slewing bearing is fixed to the chassis 35, and the inner ring is fixed to the bottom surface of the load-bearing platform 21. The slewing bearing is connected to a slewing drive mechanism, which includes a slewing motor and a reducer. The slewing motor drives the load-bearing platform to rotate relative to the chassis 35 through the reducer. This structure allows the load-bearing platform 21 to rotate 360 ​​degrees relative to the chassis 35, thereby realizing the switching of the drilling mechanism and the rebar cage hoisting mechanism 28.

[0032] In addition, two arc-shaped claws 33 are provided at one end of the frame 35. The arc-shaped claws 33 are specifically semi-arc structural components. The two arc-shaped claws 33 are spaced apart and are positioned opposite each other. A multi-directional motion mechanism is provided inside the frame 35. The multi-directional motion mechanism is connected to the arc-shaped claws 33. The multi-directional motion mechanism drives the arc-shaped claws 33 to move to hold the auger rod 3. The arc-shaped claws 33 are located on the front side of the frame, facing the drilling direction. The multi-directional motion mechanism is an existing X-axis motion mechanism and Y-axis motion mechanism. The X-axis motion mechanism is connected to the Y-axis slider of the Y-axis motion mechanism (specifically, it can be a Y-axis linear slide rail). The Y-axis motion mechanism is fixed inside the frame 35. The arc-shaped claws 33 are connected to the X-axis motion mechanism through a telescopic member 34. The X-axis motion mechanism can specifically be a linear telescopic mechanism. The telescopic member 34 specifically includes a double-layer threaded tube. Under the action of external force, it can lengthen, raise, or lower the position of the arc-shaped claws 33. The telescopic member 34 cooperates with the X-axis motion mechanism to ensure the range of motion of the arc-shaped claws 33.

[0033] It needs to be explained that after the auger rod 3 has completed drilling, when lowering the reinforcing cage, it is necessary to maintain the stability of the auger rod 3. The arc-shaped chuck 33 can hold the auger rod. If the head of the auger rod 3 and the arc-shaped chuck 33 are on the same plane, the X-axis motion mechanism needs to control the arc-shaped chuck 33 to extend, and the Y-axis motion mechanism drives the arc-shaped chucks 33 on both sides to be positioned opposite each other to hold the top of the auger rod 3. If the top of the auger rod is lower than the arc-shaped chuck 33, because the arc-shaped chuck 33 is connected to the X-axis motion mechanism through the telescopic member 34, the operator needs to help pull the telescopic member 34 so that the arc-shaped chuck 33 holds the top of the auger rod 3.

[0034] In other examples, the multi-directional motion mechanism includes a Y-axis clamping cylinder. The two sides of the Y-axis clamping cylinder are connected to the arc-shaped claws 33 via telescopic components 34. The clamping action of the arc-shaped claws 33 is achieved by the Y-axis clamping cylinder. The cylinder-driven method has the advantages of fast response speed and high control precision, and is suitable for construction scenarios with high requirements for clamping speed. The telescopic component 34 is also a double-layer corrugated pipe, which is conducive to adjusting the position of the arc-shaped claws under the action of external force.

[0035] It is easy to understand that the power source of the power head 14, the power source of the slewing mechanism 22, the rebar cage hoisting mechanism 28, the chassis traveling mechanism 23, and the multi-directional motion mechanism are each connected to the control unit separately. The control unit is specifically a PLC controller or other type of controller. The control unit controls each structural component, thereby realizing the sequential control of each structural component. The rebar cage hoisting mechanism 28 is set opposite to the drilling mechanism, which is located at the front of the bearing platform 21. The two are symmetrically arranged along the longitudinal center line of the bearing platform 21, which helps to ensure the balance of the bearing of the bearing platform 21. The operating room 26 is set at the center of the bearing platform 21. The control unit is set inside the operating room 26, which allows the staff to control each structural component from inside the operating room 26. The engine 19 and the hydraulic pump 20 are set outside the operating room 26. The engine 19 is used to provide power to each structural component, and the hydraulic pump 20 is used to provide power to the hydraulic structural components.

[0036] It is easy to understand that the auger drill rod 3 includes a drill rod body. The outer diameter of the upper half of the drill rod body is larger than that of the lower half (the length of the larger outer diameter section is greater than the length of the smaller outer diameter section). The auger drill rod 3 is circumferentially equipped with helical blades 4. The outer diameter of the helical blades in the upper half of the auger drill rod is larger than that in the lower half (the width of the helical blades 4 can be the same from top to bottom, but because the diameter of the auger drill rod 3 is variable, the outer diameter of the upper half is larger than that of the lower half). This results in a hole structure that is larger at the top and smaller at the bottom during drilling. This structure forms a corresponding T-shaped pile structure after subsequent grouting. The bottom end of the helical blades 4 is equipped with a drill bit 1. The drill bit 1 is rotatably connected to the auger drill rod 3 so that the drill bit 1 can be separated from the auger drill rod 3 when the helical blades 4 are lifted. The arrangement of the helical blades 4 also facilitates the upward movement of the soil during drilling, transferring the soil to the outside of the borehole.

[0037] Specifically, the drill bit 1 is connected to the auger drill rod 3 via the hinge shaft 2. During drilling, the drill bit 1 remains closed under the axial pressure applied by the power head 14 to form a stable drilling structure. After drilling is completed, when the power head 14 is lifted to release the axial pressure, the drill bit 1 opens around the hinge shaft 2 under its own weight, thereby forming a hole-enlarging space. This structure prevents the drill bit from dragging the reinforcing cage upwards during the lifting process.

[0038] refer to Figure 2 As shown, the drill bit 1 includes a support plate. Multiple drill teeth 36 are provided at the end of the support plate away from the auger drill rod. Specifically, more than 10 drill teeth 36 can be provided to ensure drilling effect. The end of the drill teeth 36 away from the support plate is sharp. The sum of the length of the drill teeth 36 and the outer diameter of the bottom end of the auger drill rod is less than the minimum inner diameter of the auger blade. In this way, the drill teeth 36 will not contact the hole wall during the lifting of the auger drill rod 3, thus avoiding the occurrence of hole collapse problem.

[0039] In addition, the frame 35 supports the mast 17 and the power head lifting mechanism 16. The wire rope of the power head lifting mechanism 16 is connected to the power head 14 through the top of the mast 17. The mast 17 is a longitudinally arranged frame structure. The mast 17 is supported and fixed to the upper surface of the bearing platform 21 by the luffing cylinder 18. The luffing cylinder 18 can push the tilt angle of the mast 17. A guide rail is provided on the front side of the mast 17. The guide rail extends longitudinally along the mast 17. The power head 14 slides with the guide rail on the front side of the mast 17 through a slider. The power head lifting mechanism 16 includes a winch and a power head wire rope 15. The winch is fixed to the bearing platform 21. One end of the power head wire rope 15 is fixed to the drum of the winch, and the other end extends downward through the pulley block at the top of the mast 17 and is fixed to the top of the power head 14. When the winch winds up and unwinds the power head wire rope 15, the power head 14 moves up and down along the guide rail. The power head lifting mechanism 16 realizes the lifting and lowering movement of the power head 14 along the mast 17, providing power for drilling, hoisting the drill bit, and separation and reconnection from the auger drill rod 3.

[0040] It should be noted that the power head 14 is an existing rotary drive device. The power head 14 includes a drive motor 12 and a reducer. The drive motor 12 drives the output shaft to rotate through the reducer. The lower end of the output shaft of the power head 14 is fixedly connected to a spline shaft 13. The spline shaft 13 is an external spline shaft, and its outer surface is provided with multiple external spline teeth along the axial direction. The spline shaft 13 extends downward and is inserted into the locking sleeve 11 and the spline sleeve 5. The inner surface of the spline sleeve 5 is provided with internal spline teeth that cooperate with the external spline teeth of the spline shaft 13. The spline shaft 13 and the spline sleeve 5 constitute a spline transmission mechanism, which allows axial relative sliding between the spline shaft 13 and the spline sleeve 5 while transmitting torque, thereby realizing the rotational drive and separation control of the auger drill rod 3 by the power head 14.

[0041] It should be noted that the reference Figure 3 As shown, the power head 14 is detachably connected to the top of the auger rod 3 via the locking sleeve 11. A locking component is provided inside the locking sleeve 11. The locking component is located inside the bottom end of the locking sleeve 11 and is arranged along the radial direction of the locking sleeve 11. A recess is provided at the top of the auger rod 3. The locking component can be fitted onto the circumferential top of the auger rod. The inner diameter of the locking component can be increased or decreased to lock the locking component into the recess of the auger rod 3. Furthermore, the spline sleeve 5 is fixed to the top of the auger drill rod 3, and a bearing step 10 is provided on the outside of the spline sleeve 5. The bearing step 10 is an annular boss structure. The bearing step 10 is fixed to the outer surface of the spline sleeve 5. The top surface of the bearing step 10 is a horizontal plane, which is used to bear the self-weight of the auger drill rod 3 and the construction load. The locking sleeve 11 is a sleeve-shaped structure. The locking sleeve 11 is sleeved on the outside of the spline sleeve 5 and can move along the axial direction of the spline sleeve 5.

[0042] In this embodiment, a locking component is provided on the inner side of the locking sleeve 11. The locking sleeve 11 is used to limit and lock the bearing step 10, thereby realizing the lifting effect of the power head on the auger drill rod. (Reference) Figure 5As shown, specifically, the locking component includes multiple sector-shaped blocks arranged radially along the locking sleeve 11. The multiple sector-shaped blocks are assembled into a circular structure. An elastic element is set inside the sector-shaped block. The elastic element is specifically a spring. One end of the elastic element is connected to one end of the sector-shaped block (the end close to the central axis of the locking sleeve 11), and the other end passes through the sector-shaped block and is connected to the locking sleeve 11. The elastic element applies pressure to the inward side to achieve locking. An annular recess is set at the top of the spline sleeve 5 near the end of the spiral drill rod 3. The annular recess is an annular groove structure, and its inner diameter is smaller than the outer diameter of the main body of the spline sleeve 5. The locking component can be fitted into the annular recess of the spline sleeve 5. When the locking sleeve 11 moves downward to the position of the corresponding annular recess of the locking component, the locking component retracts radially inward under the action of the elastic element and is locked into the annular recess, thereby achieving axial limiting and locking of the spline sleeve 5. When the locking sleeve 11 moves upward, the locking component disengages from the annular recess, the inner diameter of the locking component increases, and the locking of the spline sleeve 5 is released. This locking structure achieves reliable locking and rapid release of the spline sleeve 5 through the locking sleeve 11 and the locking component on its inner side, thereby realizing the lifting and separation control of the auger drill rod 3 by the power head 14.

[0043] It is easy to understand that the top of the locking sleeve 11 is provided with a grouting hole 7, which is a circular through hole. The grouting hole 7 is connected to the internal grouting channel 6. A sealing element 9 is provided at the grouting hole. The sealing element 9 is a rubber sealing ring, which is used to form a seal when the power head 14 is connected to the spiral drill rod 3, thereby preventing grout leakage. When the power head 14 is connected to the spiral drill rod 3, the sealing element 9 is pressed against the top surface of the spline sleeve 5, thereby forming a seal between the grouting hole and the internal grouting channel 6, preventing grout leakage. The grout enters the internal grouting channel 6 through the external grouting pipe 8. The internal grouting channel can realize grouting from the bottom of the spiral drill rod 3 and inject it into the hole from bottom to top during the drilling process.

[0044] It should be noted that the internal grouting channel 6 is a tubular channel extending axially along the spiral drill rod 3. The top end of the internal grouting channel 6 is connected to the grouting hole at the top of the locking sleeve 11, and the bottom end of the internal grouting channel 6 is provided with a grout outlet facing the hollow interior of the spiral drill rod 3. Multiple internal grouting channels 6 are evenly distributed circumferentially along the spiral drill rod 3, and the grout outlets are evenly distributed circumferentially along the inner wall of the spiral drill rod 3. This structure allows the grout to be transported from the top end to the bottom end of the spiral drill rod 3 through the internal grouting channel 6 and injected into the hollow interior of the spiral drill rod 3 from the grout outlet, achieving continuous grouting during drilling.

[0045] refer to Figure 4As shown, the rebar cage hoisting mechanism includes a base 32 with a longitudinal groove. The groove has a semi-circular cross-section. A segmented telescopic arm 29 is installed at the top of the groove to adjust the hoisting height of the rebar cage. Each segment of the segmented telescopic arm 29 is an arc-shaped structural component to reserve space for the rebar cage. A hook 30 is installed on the inner wall of the top segment of the segmented telescopic arm 29. The hook 30 has a hook-shaped structure. The rebar cage hoisting mechanism 28 is connected to the hook 30 via a rebar cage hoisting wire rope 27. The telescopic power source is connected to the segmented telescopic arm 29. The telescopic power source is a telescopic drive cylinder 31, which is located inside the bottom telescopic arm segment. The diameter of the rebar cage matches the hollow structure inside the spiral drill rod 3, so that it can be lowered along the inside of the spiral drill rod 3 to achieve guidance and limiting.

[0046] Specifically, the base 32 is fixed to the support platform 21. The base 32 is a frame structure, and a longitudinal groove is provided inside the base 32. The groove is a rectangular groove structure that extends longitudinally along the base 32, providing installation and movement space for the segmented telescopic arm 29. The segmented telescopic arm 29 is set at the top of the groove. The segmented telescopic arm 29 consists of multiple telescopic arm sections that are connected in sequence along the longitudinal direction, with the lower telescopic arm fitted outside the upper telescopic arm. Each section of the segmented telescopic arm 29 is an arc-shaped structural component, and the cross-section of each telescopic arm section is a semi-circular arc. The maximum outer diameter of the segmented telescopic arm is greater than the diameter of the borehole, and the outer diameter of the reinforcing cage is smaller than the minimum inner diameter of the auger drill rod 3, allowing the reinforcing cage to be lowered into the auger drill rod 3 under the arc-shaped guiding constraint of the segmented telescopic arm 29. When the telescopic drive cylinder 31 extends, the piston rod pushes the top telescopic arm section upward, and each telescopic arm section extends upward in sequence (the stroke of the telescopic drive cylinder 31 is about 6m, which meets the usage requirements). The segmented telescopic arm 29 extends, and the hook 30 rises, realizing the lifting of the rebar cage. When the telescopic drive cylinder 31 retracts, the piston rod pulls the top telescopic arm section downward, and each telescopic arm retracts downward in sequence. The segmented telescopic arm 29 shortens, and the hook 30 descends, realizing the lowering of the rebar cage. This structure allows for adjustment of the rebar cage lifting height through the segmented telescopic arm 29. The arc-shaped structure of the segmented telescopic arm 29 provides guiding constraints for the rebar cage, allowing it to be lowered along the hollow structure inside the auger rod 3, reducing disturbance to the borehole wall.

[0047] The equipment provided in this embodiment allows the carrying platform 21 to drive the drilling mechanism and the rebar cage hoisting mechanism 28 to rotate. Drilling is performed first via the drilling mechanism. The power head 14 and the auger drill rod 3 are detachable. After separation, the rebar cage hoisting mechanism 28 is rotated to a position above the borehole. The rebar cage is then lowered along the inside of the auger drill rod 3 via the segmented telescopic arm 29, reducing disturbance to the borehole wall. After the rebar cage is lowered, the drilling mechanism is rotated back to a position above the borehole, connecting the auger drill rod 3 to the power head 14. Once connected, the auger drill rod 3 can be lifted. Continuous sealed grouting is achieved during the lifting process through the internal grouting channel. The rotation mechanism 22 enables the switching of each process, thus achieving integrated construction of drilling, lowering, and grouting, improving construction efficiency and pile quality, and enabling the construction of T-shaped piles.

[0048] Example 2 This embodiment discloses a system for T-shaped pile construction, including a grouting mechanism and a device for T-shaped pile construction as described in Embodiment 1. The grouting mechanism includes a grouting pipe 8, which passes through a power head 14 and is connected to an internal grouting channel 6. The grouting mechanism also includes an external grouting device, which is a concrete mixing and pumping device. One end of the grouting pipe 8 is connected to the outlet of the external grouting device, and the other end passes through the power head 14 and extends into the grouting hole.

[0049] Example 3 The present invention also provides a construction method, comprising: Step 1, Drilling: (Refer to...) Figure 6 As shown, the drive head 14 is connected to the auger drill rod 3 via the spline shaft 13 and the spline sleeve 5. The output shaft of the drive head 14 drives the spline shaft 13 to rotate, and the spline shaft 13 drives the spline sleeve 5 and the auger drill rod 3 to rotate via the spline transmission mechanism. At the same time, the drive head lifting mechanism 16 releases the drive head wire rope 15, and the drive head 14 moves downward along the mast 17 under its own weight and the applied axial downward pressure, while the auger drill rod 3 drills downward. Under the rotation of the drive head 14 and the axial downward pressure, the gravity drill bit 1 remains in a closed state, the drill teeth 36 break the soil downward, and the helical blades 4 discharge the broken soil upward along the helical blades. Because the outer diameter of the auger drill rod 3 is larger at the top and smaller at the bottom, and the outer diameter of the helical blades 4 gradually decreases from top to bottom, a variable diameter hole is formed during drilling, with a larger diameter at the top and a smaller diameter at the bottom, which meets the forming requirements of the T-shaped pile.

[0050] The second step is to reach the designed depth: After the auger rod 3 has drilled to the predetermined depth, the power head 14 stops working, and the two arc-shaped chucks 33 move towards each other and clamp the auger rod 3, fixing it in its current position. Then, the power head lifting mechanism 16 tightens the power head wire rope 15, and the power head 14 moves upward along the mast 17. The spline shaft 13 is pulled out axially from the spline sleeve 5, disengaging from the spline sleeve 5, and the power head 14 separates from the auger rod 3. During this process, the arc-shaped chucks 33 clamp the auger rod 3, keeping it in its current position within the borehole.

[0051] The third step is equipment rotation: While the equipment is drilling, the reinforcing cage is welded in sections behind the equipment. The reinforcing cage is a cage-like structure formed by welding longitudinal main bars and circumferential stirrups. The diameter of the reinforcing cage matches the inner diameter of the hollow structure inside the auger drill rod 3. After welding, the reinforcing cage is lifted by the reinforcing cage lifting mechanism 28. The hook 30 is attached to the top of the reinforcing cage, the telescopic drive cylinder 31 extends, the section telescopic arm 29 extends, and the hook 30 rises, lifting the reinforcing cage to a position above the ground. Subsequently, the rotation mechanism 22 rotates, and the support platform 21 rotates 180 degrees with the rotation mechanism 22. The reinforcing cage lifting mechanism 28 moves from the rear to the front of the support platform 21, positioned directly above the borehole, and the drilling system moves from the front to the rear of the support platform 21. This rotation switching realizes the conversion between the drilling position and the reinforcing cage lowering position.

[0052] Step 4, Lowering the steel cage: (See reference) Figure 7 As shown, under the guidance and constraint of the segmented telescopic boom 29 and its arc-shaped groove, the telescopic drive cylinder 31 retracts, the segmented telescopic boom 29 shortens, the hook 30 descends, and the reinforcing cage moves downward along the hollow structure of the auger rod 3. The arc-shaped structure of the segmented telescopic boom 29 provides guidance and constraint to the reinforcing cage, keeping it within the hollow channel of the auger rod 3 during descent, preventing contact between the reinforcing cage and the borehole wall, and reducing disturbance to the borehole wall. After the reinforcing cage is lowered to the predetermined position in the borehole, the bottom end of the reinforcing cage is near the bottom of the borehole, and the top end of the reinforcing cage is above the ground.

[0053] Step 5, Grouting and Pile Formation: After the reinforcing cage is lowered, the drive slewing mechanism 22 rotates, and the bearing platform 21 rotates 180 degrees with the slewing mechanism 22. The drilling mechanism moves from the rear to the front of the bearing platform 21, positioned directly above the borehole. The reinforcing cage hoisting mechanism moves from the front to the rear of the bearing platform 21. The power head lifting mechanism 16 releases the power head wire rope 15, and the power head 14 moves downward along the mast 17. The spline shaft 13 is inserted downward into the spline sleeve 5, and the spline shaft 13 is reconnected to the spline sleeve 5. The power head 14 is also reconnected to the auger drill rod 3. Simultaneously, the grouting hole connects to the internal grouting channel 6, the retracting chuck cylinder moves the two arc-shaped chucks 33 in opposite directions, and releases the auger drill rod 3.

[0054] The external grouting equipment is activated, and grout is delivered to the grouting hole through the grouting pipe 8. The grout then enters the internal grouting channel 6, which delivers the grout to the bottom of the auger drill rod 3. The grout is injected into the hollow interior of the auger drill rod 3 from the grout outlet, filling the internal space of the reinforcing cage and flowing downwards to the bottom of the hole. Simultaneously, the power head lifting mechanism 16 tightens the power head wire rope 15, and the power head 14 moves upwards along the mast 17, lifting the auger drill rod 3. The auger drill rod 3 moves upwards from the borehole. After losing axial pressure, the drill bit 1 opens outwards around the hinge axis 2 under its own weight, the support plate flips outwards, and the drill teeth 36 expand outwards, forming an enlarged hole space. During the lifting process, grout continues to be injected into the borehole from the grout outlet, filling the hole space from bottom to top, forming a continuous concrete pile. Finally, the auger drill rod 3 is completely pulled out of the borehole. Figure 8 As shown, a T-shaped pile body is formed by enclosing a steel reinforcement cage. The upper diameter of the T-shaped pile is larger and the lower diameter is smaller, forming a T-shaped structure that meets the design requirements.

[0055] The construction process provided in this embodiment, by setting a rotatable bearing platform 21, allows the drilling mechanism and the rebar cage hoisting mechanism 28 to switch working positions on the same equipment, realizing integrated continuous construction of drilling, rebar cage lowering, and grouting. This eliminates the need for repeated equipment changes during construction, effectively simplifying the construction process and significantly improving construction efficiency. By setting a variable-diameter auger drill rod with a larger outer diameter at the top and a smaller outer diameter at the bottom, a hole structure with a larger outer diameter at the top and a smaller outer diameter can be directly formed during drilling, meeting the requirements for T-shaped pile formation without the need for secondary hole enlargement. By setting a drill bit 1 that can be opened relative to the auger drill rod 3, the drill bit 1 closes during drilling and automatically opens when the drill is lifted, realizing the conversion between drilling and hole enlargement functions. When the drill bit opens during the lifting process, it will not drag the lowered rebar cage upward, avoiding disturbance to the rebar cage and ensuring the quality of pile formation. By setting up a steel cage hoisting mechanism, the steel cage can be lowered along the inside of the auger rod. Each section of the segmented telescopic arm 29 is an arc-shaped structural component that guides and constrains the steel cage, reducing disturbance to the borehole wall and avoiding borehole collapse. By setting a through internal grouting channel 6 on the side wall of the auger rod 3, continuous sealed grouting is achieved during the drilling process, ensuring the grouting quality and pile quality.

[0056] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A device for T-pile construction, characterized in that, include: The support platform can be rotatably mounted on the vehicle frame; The drilling mechanism is installed on the support platform. The drilling mechanism includes a power head, which is detachably connected to the spiral drill rod. The spiral drill rod is hollow and has a drill bit at the bottom. The drill bit can be opened relative to the spiral drill rod. An internal grouting channel is provided on the side wall of the spiral drill rod. The internal grouting channel runs through the spiral drill rod. The outer diameter of the spiral drill rod is larger at the top and smaller at the bottom. The rebar cage hoisting mechanism is installed on the vehicle frame. After the power head is separated from the auger drill rod, the rebar cage hoisting mechanism can be raised and lowered to place the rebar cage into the auger drill rod after the bearing platform rotates at a set angle.

2. The equipment for T-pile construction according to claim 1, characterized in that, The power head is detachably connected to the top of the auger rod via a locking sleeve. A locking component is provided inside the locking sleeve and is arranged along the radial direction of the locking sleeve. A recess is provided at the top of the auger rod. The locking component can be fitted onto the circumferential top of the auger rod. The inner diameter of the locking component can be increased or decreased to engage the locking component with the recess of the auger rod.

3. The equipment for T-pile construction according to claim 2, characterized in that, The locking sleeve is hollow inside, and a grouting hole is provided at the top of the locking sleeve. The grouting hole is connected to the internal grouting channel, and a sealing element is provided at the grouting hole. The internal grouting channel is provided in multiple places, and the grout outlet at the bottom of the internal grouting channel faces the hollow part inside the auger drill rod.

4. The equipment for T-pile construction according to claim 1, characterized in that, The spiral drill rod has spiral blades arranged circumferentially, and the drill bit is arranged at the bottom end of the spiral blades. The drill bit is rotatably connected to the spiral drill rod so that the drill bit is separated from the spiral drill rod when the spiral blades are lifted.

5. The equipment for T-pile construction according to claim 4, characterized in that, The drill bit includes a support plate, and multiple drill teeth are provided at the end of the support plate away from the auger rod. The sum of the length of the drill teeth and the outer diameter of the bottom end of the auger rod is less than the minimum inner diameter of the auger blade.

6. The equipment for T-pile construction according to claim 1, characterized in that, Two arc-shaped claws are provided at one end of the frame. A multi-directional motion mechanism is provided inside the frame. The multi-directional motion mechanism is connected to the arc-shaped claws. The multi-directional motion mechanism drives the arc-shaped claws to move so as to hold the auger rod. The vehicle frame is also equipped with a chassis running mechanism, and the power head, the steel cage hoisting mechanism, the chassis running mechanism, and the multi-directional motion mechanism are each individually connected to the control unit.

7. The equipment for T-pile construction according to claim 1, characterized in that, The steel cage hoisting mechanism includes a base with a longitudinal groove. A segmented telescopic arm is set at the top of the groove. Each segment of the telescopic arm is an arc-shaped structural component to reserve space for the steel cage. A hook is set at the topmost segment of the telescopic arm. The telescopic power source is connected to the topmost segment of the telescopic arm, and the telescopic power source is fixed inside the bottommost segment of the telescopic arm.

8. The equipment for T-pile construction according to claim 1, characterized in that, The steel cage hoisting mechanism is positioned opposite to the auger drill rod at the vehicle frame; The frame supports the mast and the power head lifting mechanism. The wire rope of the power head lifting mechanism passes through the top of the mast and is connected to the power head.

9. A system for T-pile construction, characterized in that, The device includes a grouting mechanism and an apparatus for T-pile construction according to any one of claims 1-8. The grouting mechanism includes a grouting pipe that passes through the power head and communicates with the internal grouting channel.

10. A construction method for T-shaped piles, characterized in that, The device for T-pile construction according to any one of claims 1-8 includes the following: The power head is connected to the auger drill rod. Under the action of the rotation of the power head and the axial downward pressure, the drill bit closes and drills downward into the soil, forming a variable diameter borehole with a larger top and a smaller bottom. Once the borehole reaches the predetermined depth, drilling is stopped, and the connection between the power head and the auger is disconnected. While the equipment is drilling, the steel cage is welded in sections behind the equipment and lifted by the steel cage hoisting mechanism. The rotating platform causes the steel cage hoisting mechanism to rotate to a position directly above the drilling hole. The steel cage hoisting mechanism lowers the steel cage along the hollow part of the spiral drill rod to the predetermined position inside the hole; The rotation of the support platform causes the power head to rotate above the auger drill rod, reconnecting the power head and the drill rod. Grout is then delivered through the internal grouting channel and injected into the borehole through the bottom of the auger drill rod. The auger drill rod is lifted by the power head. After losing axial pressure, the drill bit opens outward under its own weight, eventually forming a T-shaped pile body that encloses the steel cage.

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