Deeply buried foundation hole wall roughening and soil body reaming integrated drill bit and system

Abstract

The utility model provides a kind of deep buried foundation hole wall chiseling and soil mass reaming integrated drill head and system, belong to geotechnical engineering ground foundation reinforcement field, for solving the problem of deep buried foundation hole wall using artificial way chiseling difficulty without upper covering soil excavation condition;It includes transmission rod and its inside center oil channel, transmission rod is equipped with first hydraulic oil cylinder, radial chiseling assembly, second hydraulic oil cylinder and reaming assembly;The oil inlet of two oil cylinders is communicated with center oil channel;Radial chiseling assembly includes fixed seat, chiseling tooth seat and reset component, is driven radial opening by first hydraulic oil cylinder;Reaming assembly includes reaming fin and guide seat, is driven radial opening by second hydraulic oil cylinder;Single drilling can realize deep buried foundation hole inner wall chiseling and soil mass internal hole reaming operation;After pouring sealing concrete, the interface bonding effect of new and old concrete can be strengthened, and the soil mass reaming cavity is filled with concrete, which can effectively improve the integrity and durability of foundation.

Description

Technical Field

[0001] This utility model belongs to the field of geotechnical engineering foundation reinforcement, and in particular relates to an integrated drill bit and system for roughening the wall of a deep-buried foundation tunnel and expanding the hole in the soil. Background Technology

[0002] In various geotechnical reinforcement projects, such as uneven settlement treatment of existing building foundations, reinforcement of concrete foundations, and treatment of foundation buoyancy failure induced by rising groundwater levels, the conventional construction process is as follows: excavation and removal of the overburden above the foundation; drilling through the foundation body and the underlying overburden layer using drilling equipment; foundation reinforcement work; and finally, sealing of the foundation hole. To ensure the integrity of the reinforced foundation and improve the interfacial bonding force between the old and new concrete, the concrete walls of the foundation hole need to be roughened. For reinforcement projects with overburden excavation conditions, the roughening of the foundation hole walls can be done manually. However, for reinforcement projects that require uninterrupted equipment operation and no site relocation during the reinforcement construction period (such as factory production workshops and equipment rooms), the conditions for excavation of the overburden are not available. The limited working space for such deep foundations makes it difficult to roughen the hole walls manually. Utility Model Content

[0003] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide an integrated drill bit and system for roughening the wall of a deep-buried foundation tunnel and expanding the hole in the soil, so as to solve the problem of the difficulty of roughening the wall of a deep-buried foundation tunnel by manual means when there is no condition for excavation of the upper soil cover.

[0004] To achieve the above and other related objectives, this utility model provides an integrated drill bit for roughening the walls of deeply buried foundation tunnels and enlarging the soil, comprising: a transmission rod with a central oil passage arranged axially inside; a first hydraulic cylinder fixedly mounted on the transmission rod, the oil inlet of the first hydraulic cylinder communicating with the central oil passage; and a radial roughening assembly including a fixed base, multiple roughening tooth seats, and a reset assembly. The fixed base is fixedly mounted on the transmission rod, the multiple roughening tooth seats are circumferentially spaced on the fixed base, each roughening tooth seat is radially slidably connected to the fixed base, and the output end of the first hydraulic cylinder is drively connected to the roughening tooth seats for driving the roughening tooth seats. The first hydraulic cylinder opens radially outward, and the reset assembly drives the chisel tooth seat to reset radially inward; the second hydraulic cylinder is fixedly mounted on the transmission rod and spaced axially from the first hydraulic cylinder along the transmission rod, and the oil inlet of the second hydraulic cylinder is connected to the central oil passage; the hole-expanding assembly includes multiple hole-expanding blades and a guide seat, the guide seat is fixedly mounted on the transmission rod, the multiple hole-expanding blades are spaced circumferentially and each is hinged to the output end of the second hydraulic cylinder, and the second hydraulic cylinder drives the hole-expanding blades to slide along the guide seat, thereby causing the hole-expanding blades to open radially; wherein, the driving pressure of the first hydraulic cylinder is different from that of the second hydraulic cylinder.

[0005] Optionally, the fixed seat includes a first fixed sub-seat and a second fixed sub-seat that are spaced apart along the axial direction of the transmission rod; the first fixed sub-seat and the second fixed sub-seat each include a limiting ring and a plurality of connecting blocks, the plurality of connecting blocks being spaced apart circumferentially on the inner sidewall of the limiting ring, and the end of the connecting block away from the limiting ring being used for fixed connection with the transmission rod; the two ends of the chisel tooth seat are respectively provided with a first limiting block, the first limiting block being located between two adjacent connecting blocks, and the first limiting block being used to abut against the inner sidewall of the limiting ring.

[0006] Optionally, the two limiting rings are provided with multiple limiting grooves on one side of their opposite arrangement; the two ends of the chisel tooth seat are provided with second limiting blocks, which slide in cooperation with the limiting grooves at the corresponding ends. The limiting grooves are used to restrict the circumferential rotation of the chisel tooth seat relative to the limiting rings.

[0007] Optionally, the reset assembly includes multiple elastic elements, each corresponding to a multiple first limiting block; one end of each elastic element is connected to the outer wall of the corresponding first limiting block, and the other end is connected to the inner wall of the corresponding limiting ring.

[0008] Optionally, the reset assembly further includes a plurality of first blind holes disposed on the limiting ring and a plurality of second blind holes disposed on the first limiting block; the first blind holes, the second blind holes and the elastic element are disposed in a one-to-one correspondence; one end of the elastic element is connected to the bottom of the first blind hole and the other end is connected to the bottom of the second blind hole.

[0009] Optionally, a plurality of first wedge blocks are circumferentially spaced at the output end of the first hydraulic cylinder; a first guide slope is provided on the inner side wall of the first limiting block at the end of the chisel tooth seat near the first hydraulic cylinder, the first guide slope is provided in correspondence with the first wedge blocks, and the first guide slope is slidably engaged with the first wedge blocks.

[0010] Optionally, the output end of the first hydraulic cylinder is further provided with a plurality of second wedge blocks and a plurality of transition blocks, the first wedge blocks, transition blocks and second wedge blocks are arranged in a one-to-one correspondence, and the transition blocks connect the first wedge blocks and the second wedge blocks; the inner side wall of the second limiting block on the end of the chisel tooth seat away from the first hydraulic cylinder is provided with a second guide slope, the second guide slope is arranged in a one-to-one correspondence with the second wedge blocks, and the second guide slope is in sliding engagement with the second wedge blocks.

[0011] Optionally, a third guide ramp is provided on the guide seat, and a fourth guide ramp is provided on the inner wall of each enlarged wing for sliding engagement with the third guide ramp.

[0012] Optionally, each expanding blade has a fifth guide slope connected to the fourth guide slope on its inner wall. The fifth guide slope is slidably engaged with the third guide slope, and the fourth guide slope and the fifth guide slope are in opposite directions. Multiple cutting elements are arranged in a spaced array on the inner wall of each expanding blade. One end of each cutting element is fixedly connected to the expanding blade. The other ends of the multiple cutting elements together enclose the blade, and the other end of each cutting element forms part of the fourth guide slope or part of the fifth guide slope.

[0013] On the other hand, a drilling system is also provided, including a drive device, a hydraulic system, and an integrated drill bit for roughening the wall of a deep-buried foundation tunnel and enlarging the soil, as described above; the integrated drill bit for roughening the wall of a deep-buried foundation tunnel and enlarging the soil is detachably connected to the drive device, the drive device is used to drive the integrated drill bit for roughening the wall of a deep-buried foundation tunnel and enlarging the soil to rotate, and the hydraulic system is used to communicate with the central oil passage.

[0014] As described above, the integrated drill bit and system for roughening the wall of a deep-buried foundation hole and enlarging the soil of this utility model has at least the following beneficial effects: by integrating the radial roughening component and the enlarging component on the same transmission rod, and configuring the first hydraulic cylinder and the second hydraulic cylinder to drive them independently, the inner wall of the deep-buried foundation hole and the enlarging of the hole inside the soil can be achieved in a single drilling operation. After the concrete is poured, the mechanical interlocking force between the poured concrete and the original concrete of the foundation is effectively improved, and the durability of the foundation is effectively improved. This avoids the need for the chisel and the enlarging drill bit to be used in separate operations, thus improving construction efficiency. Attached Figure Description

[0015] Figure 1 The diagram shows the overall structure of the integrated drill bit for roughening the wall of a deep-buried foundation tunnel and expanding the hole in the soil, which is a schematic diagram of the present invention.

[0016] Figure 2 The diagram shown is a structural schematic of the radial chiseling assembly of this utility model.

[0017] Figure 3 The diagram shown is a structural schematic of the chisel tooth holder of this utility model.

[0018] Figure 4 The diagram shown is a structural schematic of the first fixed sub-base of this utility model.

[0019] Figure 5 The diagram shows the structure of the first wedge block, the second wedge block, and the transition block of this utility model.

[0020] Figure 6 Displayed as Figure 1 An enlarged diagram of point A in the diagram.

[0021] Component designation explanation: 1. Transmission rod; 2. First hydraulic cylinder; 21. First wedge block; 22. Second wedge block; 23. Transition block; 3. Radial chiseling assembly; 31. Fixed seat; 311. First fixed sub-seat; 312. Second fixed sub-seat; 313. Limiting ring; 3131. Limiting groove; 314. Connecting block; 32. Chiseling tooth seat; 321. First limiting block; 322. Second limiting block; 323. First guide slope; 324. Second guide slope; 33. Reset assembly; 331. Elastic element; 4. Second hydraulic cylinder; 5. Hole enlarging assembly; 51. Hole enlarging wing; 511. Fourth guide slope; 512. Fifth guide slope; 513. Cutting part; 52. Guide seat; 521. Third guide slope. Detailed Implementation

[0022] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0023] Please refer to all the accompanying drawings below. It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and are not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0024] The following embodiments are for illustrative purposes only. These embodiments can be combined and are not limited to the content shown in any single embodiment below.

[0025] Please see Figures 1-6 This utility model provides an integrated drill bit for roughening the walls of deeply buried foundation tunnels and enlarging the soil. The drill bit includes a transmission rod 1, which has a central oil passage along the axial direction inside. Specifically, the transmission rod 1 serves as the load-bearing base and power transmission hub of the entire drill bit, and its central oil passage runs through the entire length of the rod, used to deliver high-pressure hydraulic oil to the actuators located at different axial positions.

[0026] The drill bit also includes a first hydraulic cylinder 2, which is fixedly mounted on the transmission rod 1. The oil inlet of the first hydraulic cylinder 2 is connected to the central oil passage. The drill bit also includes a radial burring assembly 3, comprising a fixed base 31, multiple burring tooth seats 32, and a reset assembly 33. The fixed base 31 is fixedly mounted on the transmission rod 1. The multiple burring tooth seats 32 are circumferentially spaced on the fixed base 31, and each burring tooth seat 32 is radially slidably connected to the fixed base 31. The output end of the first hydraulic cylinder 2 is drively connected to the burring tooth seat 32, driving the burring tooth seat 32 to open radially outward. The reset assembly 33 drives the burring tooth seat 32 to return radially inward. Specifically, the first hydraulic cylinder 2 is typically located in the lower middle region of the transmission rod 1, close to the target hole section for burring. When high-pressure oil enters the first hydraulic cylinder 2, it pushes the piston to move and converts the axial thrust into the radial expansion force of the chisel tooth seat 32, causing it to embed into the hole wall for chiseling operations; when the oil pressure is released, the reset component 33 provides a restoring force to retract the chisel tooth seat 32 so that the drill bit can be lifted or moved.

[0027] The drill bit also includes a second hydraulic cylinder 4, which is fixedly mounted on the transmission rod 1 and spaced axially from the first hydraulic cylinder 2 along the transmission rod 1. The oil inlet of the second hydraulic cylinder 4 is connected to the central oil passage. Furthermore, the drill bit includes a reaming assembly 5, comprising multiple reaming blades 51 and a guide seat 52. The guide seat 52 is fixedly mounted on the transmission rod 1. The multiple reaming blades 51 are circumferentially spaced and each is hinged to the output end of the second hydraulic cylinder 4. The second hydraulic cylinder 4 drives the reaming blades 51 to slide along the guide seat 52, thereby causing the reaming blades 51 to open radially. Specifically, the second hydraulic cylinder 4 and the reaming assembly 5 are located at the bottom end of the transmission rod 1, adjacent to the bottom of the hole. This axially spaced arrangement allows the roughening functional area and the reaming functional area to be spatially independent and non-interfering, thus enabling the integration of two distinct hole-forming processes on the same transmission rod 1.

[0028] The driving pressure of the first hydraulic cylinder 2 differs from that of the second hydraulic cylinder 4. Specifically, since the oil inlets of both cylinders are connected to the same central oil passage, the system pressure rises synchronously during single-source pressurization. Through differentiated hardware settings, the driving pressure of the first hydraulic cylinder 2 can be greater than that of the second hydraulic cylinder 4, meaning the starting pressure threshold of the second hydraulic cylinder 4 is lower than that of the first hydraulic cylinder 2. This allows the second hydraulic cylinder 4 to start before the first hydraulic cylinder 2, performing hole enlargement first and then roughening. Alternatively, the driving pressure of the first hydraulic cylinder 2 can be less than that of the second hydraulic cylinder 4, meaning the starting pressure threshold of the second hydraulic cylinder 4 is lower than that of the first hydraulic cylinder 2. This also allows the first hydraulic cylinder 2 to start before the second hydraulic cylinder 4, performing roughening first and then hole enlargement.

[0029] In one specific implementation, the difference in driving pressure between the first hydraulic cylinder 2 and the second hydraulic cylinder 4 can be achieved by adjusting the effective pressure-bearing areas of the pistons of the first and second hydraulic cylinders 2 and 4. For example, the effective pressure-bearing area of ​​the piston of the first hydraulic cylinder 2 can be made smaller than that of the piston of the second hydraulic cylinder 4. Since the oil inlets of both cylinders are connected to the same central oil passage, as the system pressure gradually increases, the second hydraulic cylinder 4, due to its larger effective pressure-bearing area, generates a greater axial thrust, thus first overcoming its internal frictional resistance and the retraction resistance of the expanding blade 51 (such as the weight of the expanding blade 51), pushing the expanding blade 51 to slide along the guide seat 52 and open radially. When the system pressure continues to rise sufficiently to overcome the reset force and sliding frictional resistance of the chisel tooth seat 32 driven by the first hydraulic cylinder 2, the first hydraulic cylinder 2 begins to push the chisel tooth seat 32 to open radially outward. This achieves the predetermined sequence of "expansion first, chiseling later". It should be understood that if it is necessary to roughen the surface first and enlarge the hole later, the effective pressure area of ​​the piston of the first hydraulic cylinder 2 can be made larger than that of the piston of the second hydraulic cylinder 4.

[0030] In another specific implementation, the pressure difference is achieved by increasing the reset force of the reset component 33. For example, using a reset component 33 with a larger reset force increases the resistance to the radial inward reset of the chisel tooth seat 32. As a result, the first hydraulic cylinder 2 requires higher oil pressure to overcome this reset force and push the chisel tooth seat 32 outward. Meanwhile, the hole-expanding component 5 driven by the second hydraulic cylinder 4 typically only needs to overcome a small internal resistance and the retraction force of the blade itself, and its starting pressure threshold is lower than that of the first hydraulic cylinder 2. Therefore, when the system pressure rises synchronously, the second hydraulic cylinder 4 acts first to complete the hole expansion, and after the oil pressure rises to exceed the starting threshold of the first hydraulic cylinder 2, the first hydraulic cylinder 2 then acts to complete the chiseling.

[0031] Through the above technical solution, the chisel tooth seat 32 and the hole-reaming blade 51 are integrated on the transmission rod 1, which eliminates the secondary alignment error and auxiliary time loss caused by changing the drill bit in the traditional process, and greatly improves the construction efficiency and hole quality.

[0032] The fixed base 31 includes a first fixed sub-base 311 and a second fixed sub-base 312 spaced apart along the axial direction of the transmission rod 1. The first fixed sub-base 311 and the second fixed sub-base 312 each include a limiting ring 313 and a plurality of connecting blocks 314. The plurality of connecting blocks 314 are circumferentially spaced on the inner sidewall of the limiting ring 313. The end of each connecting block 314 away from the limiting ring 313 is used for fixed connection with the transmission rod 1. The connecting blocks 314 and the transmission rod 1 can be connected by welding or other methods. The two ends of the chisel tooth base 32 are respectively provided with first limiting blocks 321. The first limiting blocks 321 are located between two adjacent connecting blocks 314 and are used to abut against the inner sidewall of the limiting ring 313. Specifically, the connecting blocks 314 act as a force transmission bridge, firmly locking the limiting ring 313 onto the transmission rod 1, while the space between adjacent connecting blocks 314 constitutes the installation window of the chisel tooth base 32. The abutting engagement between the first limiting block 321 and the inner sidewall of the limiting ring 313 defines the radial travel endpoint of the gear seat. It should be understood that although this embodiment shows a structure in which the connecting block 314 and the limiting ring 313 are integrally formed, in other embodiments, the two can also be assembled by welding or bolting, as long as the strength and positioning requirements are met.

[0033] To further enhance the determinism of motion, multiple limiting grooves 3131 are provided on one side of the two limiting rings 313 facing each other. Second limiting blocks 322 are provided at both ends of the chisel tooth holder 32, and these second limiting blocks 322 slide in engagement with the corresponding limiting grooves 3131. The limiting grooves 3131 restrict the circumferential rotation of the chisel tooth holder 32 relative to the limiting rings 313. This embodiment constructs a rigid anti-torque constraint system through the embedded sliding engagement of the double-ended limiting grooves 3131 and the second limiting blocks 322. This structure converts the circumferential shear force into the compressive force on the sidewalls of the limiting grooves 3131, improving torsional stiffness and ensuring that the chisel tooth holder 32 smoothly extends and retracts along a predetermined radial trajectory under complex stress conditions.

[0034] The reset assembly 33 includes multiple elastic elements 331, each corresponding to a plurality of first limiting blocks 321. One end of each elastic element 331 is connected to the outer wall of the corresponding first limiting block 321, and the other end is connected to the inner wall of the corresponding limiting ring 313. Furthermore, the reset assembly 33 also includes multiple first blind holes on the limiting ring 313 and multiple second blind holes on the first limiting blocks 321; the first blind holes, second blind holes, and elastic elements 331 are correspondingly arranged; one end of each elastic element 331 is connected to the bottom of a first blind hole, and the other end is connected to the bottom of a second blind hole. The elastic element 331 can be a spring, and the walls of the blind holes provide circumferential constraints on the elastic element 331, effectively preventing buckling instability of the spring during compression and ensuring linear output and long-term reliability of the reset force.

[0035] In the transmission conversion stage, multiple first wedge blocks 21 are circumferentially spaced at the output end of the first hydraulic cylinder 2. A first guide slope 323 is provided on the inner wall of the first limiting block 321 on the end of the chisel tooth seat 32 near the first hydraulic cylinder 2. The first guide slope 323 corresponds to each of the first wedge blocks 21 and slides with them. Furthermore, the output end of the first hydraulic cylinder 2 is also provided with multiple second wedge blocks 22 and multiple transition blocks 23. The first wedge blocks 21, transition blocks 23, and second wedge blocks 22 are corresponding to each other, and the transition blocks 23 connect the first wedge blocks 21 and the second wedge blocks 22. A second guide slope 324 is provided on the inner wall of the second limiting block 322 on the end of the chisel tooth seat 32 away from the first hydraulic cylinder 2. The second guide slope 324 corresponds to each of the second wedge blocks 22 and slides with them. The first wedge block 21 and the second wedge block 22 are rigidly connected by the transition block 23, and driving force is applied synchronously at both ends of the tooth seat to ensure that the wedge surfaces at both ends advance synchronously, thus eliminating the additional internal force caused by asynchrony.

[0036] The guide seat 52 is provided with a third guide slope 521, and the inner wall of each expanding blade 51 is provided with a fourth guide slope 511 for sliding engagement with the third guide slope 521. During the process of the second hydraulic cylinder 4 driving the expanding blade 51 to move axially, the relative sliding between the third guide slope 521 and the fourth guide slope 511 converts the axial thrust into radial expansion force.

[0037] Each expanding blade 51 has a fifth guide slope 512 on its inner wall. The fifth guide slope 512 is slidably engaged with the third guide slope 521, and the fourth guide slope 511 is inclined in the opposite direction to the fifth guide slope 512. Multiple cutting elements 513 are arranged in a spaced array on the inner wall of each expanding blade 51. One end of each cutting element 513 is fixedly connected to the expanding blade 51; the other ends of the multiple cutting elements 513 together enclose the area, forming part of the fourth guide slope 511 or part of the fifth guide slope 512. The cutting elements 513 are used to further crush the stone and other structures cut off by the expanding blade 51, facilitating subsequent hole cleaning operations.

[0038] When the hydraulic system injects hydraulic oil into the central oil passage, the second hydraulic cylinder 4 first drives the fourth guide slope 511 of the expanding blade 51 to slide on the third guide slope 521 to achieve radial opening of the expanding blade 51. Then, the drive device drives the transmission rod 1 to rotate to achieve the expanding function. At the same time, the cutting part 513 simultaneously performs secondary crushing of the stone and other structures cut off by the expanding blade 51.

[0039] After the hole enlargement is completed, the hydraulic system continues to inject hydraulic oil into the central oil passage. As the pressure in the central oil passage continues to increase, the fifth guide slope 512 of the enlargement blade 51 slides on the third guide slope 521, giving the enlargement blade 51 different expansion trends and force characteristics. When the pressure in the central oil passage increases to the point that it can drive the first hydraulic cylinder 2 to move, the second hydraulic cylinder 4 is at the end of its stroke, and the enlargement blade 51 will not continue to expand or retract. Subsequently, the chisel tooth seat 32 slides on the fixed seat 31 to open. When the drive device drives the transmission rod 1 to rotate, the chisel tooth seat 32 performs chiseling operation on the inner wall of the hole. Simultaneously, the cutting part 513 further shreds the stone fragments and other structures cut off by the enlargement blade 51, facilitating subsequent hole cleaning operations.

[0040] On the other hand, a drilling system is also provided, which includes a drive device, a hydraulic system, and an integrated roughening and hole-reaming drill bit as described above. The connection end of the transmission rod 1 to the drive device may be provided with a connecting part (not shown in the figure) for connection to the drive device. The connecting part of the transmission rod 1 may be detachably connected to the spindle of the drive device using a threaded, splined, or flanged structure to achieve reliable transmission of torque and axial thrust. The drive device is used to drive the transmission rod to rotate, thereby achieving hole reaming or roughening operations. The oil inlet hole of the central oil passage may be located at the center of the end face of the connecting part. The spindle of the drive device is configured as a hollow structure, and the end of the spindle away from the transmission rod 1 can be connected to an external hydraulic system via a rotary joint. When the transmission rod 1 is installed on the spindle of the drive device, the central oil passage and the hollow part of the spindle are aligned, thereby connecting the central oil passage of the transmission rod 1 to the hydraulic system, so that the hydraulic system can drive the first hydraulic cylinder 2 and the second hydraulic cylinder 4 to operate.

[0041] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A drill bit integrating deep-buried foundation hole wall roughening and soil hole enlargement, characterized in that, include: The transmission rod has a central oil passage along the axial direction inside. The first hydraulic cylinder is fixedly mounted on the transmission rod, and the oil inlet of the first hydraulic cylinder is connected to the central oil passage; A radial burring assembly includes a fixed base, multiple burring tooth seats, and a reset assembly. The fixed base is fixedly mounted on the transmission rod. The multiple burring tooth seats are circumferentially spaced on the fixed base. Each burring tooth seat is radially slidably connected to the fixed base. The output end of the first hydraulic cylinder is drivenly connected to the burring tooth seat and is used to drive the burring tooth seat to open radially outward. The reset assembly is used to drive the burring tooth seat to reset radially inward. The second hydraulic cylinder is fixedly mounted on the transmission rod and spaced apart from the first hydraulic cylinder along the axial direction of the transmission rod. The oil inlet of the second hydraulic cylinder is connected to the central oil passage. The hole-expanding assembly includes multiple hole-expanding blades and a guide seat. The guide seat is fixedly mounted on the transmission rod. The multiple hole-expanding blades are circumferentially spaced and each is hinged to the output end of the second hydraulic cylinder. The second hydraulic cylinder is used to drive the hole-expanding blades to slide along the guide seat, thereby causing the hole-expanding blades to open radially. The driving pressure of the first hydraulic cylinder is different from that of the second hydraulic cylinder.

2. The integrated drill bit for roughening the wall of a deep-buried foundation tunnel and enlarging the soil as described in claim 1, characterized in that: The fixed base includes a first fixed sub-base and a second fixed base that are spaced apart along the axial direction of the transmission rod; The first fixed sub-base and the second fixed sub-base each include a limiting ring and a plurality of connecting blocks. The plurality of connecting blocks are arranged circumferentially at intervals on the inner sidewall of the limiting ring. The end of the connecting block away from the limiting ring is used for fixed connection with the transmission rod. The chisel tooth seat has a first limiting block at each end. The first limiting block is located between two adjacent connecting blocks and is used to abut against the inner sidewall of the limiting ring.

3. The integrated drill bit for roughening the wall of a deep-buried foundation tunnel and enlarging the soil as described in claim 2, characterized in that: The two limiting rings are respectively provided with multiple limiting grooves on one side of their opposite arrangement; The chisel tooth holder has a second limiting block at each end. The second limiting block slides into the limiting groove at the corresponding end. The limiting groove is used to restrict the circumferential rotation of the chisel tooth holder relative to the limiting ring.

4. The integrated drill bit for roughening the wall of a deep-buried foundation tunnel and enlarging the soil as described in claim 3, characterized in that: The reset component includes multiple elastic elements, and each of the multiple elastic elements is configured to correspond one-to-one with a multiple of the first limiting blocks; One end of each elastic element is connected to the outer wall of the corresponding first limiting block, and the other end is connected to the inner wall of the corresponding limiting ring.

5. The integrated drill bit for roughening the wall of a deep-buried foundation tunnel and enlarging the soil as described in claim 4, characterized in that: The reset assembly further includes a plurality of first blind holes disposed on the limiting ring and a plurality of second blind holes disposed on the first limiting block; the first blind holes, the second blind holes and the elastic element are disposed in a one-to-one correspondence; one end of the elastic element is connected to the bottom of the first blind hole and the other end is connected to the bottom of the second blind hole.

6. The integrated drill bit for roughening the wall of a deep-buried foundation tunnel and enlarging the soil as described in claim 5, characterized in that: The first hydraulic cylinder output end is provided with a plurality of first wedge-shaped blocks spaced circumferentially; The inner wall of the first limiting block on the end of the chisel tooth seat near the first hydraulic cylinder is provided with a first guide slope. The first guide slope is provided in correspondence with the first wedge block, and the first guide slope is slidably engaged with the first wedge block.

7. The integrated drill bit for roughening the wall of a deep-buried foundation tunnel and enlarging the soil as described in claim 6, characterized in that: The output end of the first hydraulic cylinder is also provided with a plurality of second wedge blocks and a plurality of transition blocks. The first wedge block, the transition block and the second wedge block are arranged in a one-to-one correspondence. The transition block connects the first wedge block and the second wedge block. A second guide slope is provided on the inner wall of the second limiting block at the end of the chisel tooth seat away from the first hydraulic cylinder. The second guide slope is provided in correspondence with the second wedge block, and the second guide slope is slidably engaged with the second wedge block.

8. The integrated drill bit for roughening the wall of a deep-buried foundation tunnel and enlarging the soil as described in claim 1, characterized in that: The guide seat is provided with a third guide slope, and the inner wall of each of the enlarged winglets is provided with a fourth guide slope for sliding cooperation with the third guide slope.

9. The integrated drill bit for roughening the wall of a deep-buried foundation tunnel and enlarging the soil as described in claim 8, characterized in that: Each of the enlarged aperture blades is further provided with a fifth guide slope connected to the fourth guide slope on its inner sidewall. The fifth guide slope is slidably engaged with the third guide slope, and the inclination direction of the fourth guide slope is opposite to that of the fifth guide slope. Multiple cutting elements are arranged in a spaced array on the inner sidewall of each of the expanding blades. One end of each cutting element is fixedly connected to the expanding blade. The other ends of the multiple cutting elements together enclose each other, and the other end of each cutting element is formed as part of the fourth guide slope or part of the fifth guide slope.

10. A drilling bit system integrating deep-buried foundation tunnel wall roughening and soil hole enlargement, characterized in that: The device includes a drive unit, a hydraulic system, and an integrated drill bit for roughening the wall of a deep foundation tunnel and enlarging the soil as described in any one of claims 1-9; the integrated drill bit for roughening the wall of a deep foundation tunnel and enlarging the soil is detachably connected to the drive unit, which is used to drive the integrated drill bit for roughening the wall of a deep foundation tunnel and enlarging the soil to rotate, and the hydraulic system is used to communicate with the central oil passage.

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