A composite foundation soft foundation treatment and reinforcement device

Abstract

The present invention relates to the field of foundation engineering technology, and specifically to a composite foundation soft foundation treatment and reinforcement device. It includes: a drill bit; a rod seat, which is coaxially fixed to the drill bit; two stirring rods, which are symmetrical and fixed to the rod seat; a drill rod, which is fixed to the end of the rod seat away from the drill bit and has a cavity formed inside; a material guide tube, which is coaxially arranged inside the drill rod and connected to the two stirring rods; a reinforcement mechanism, which is connected to the drill rod, includes a plurality of extrusion push plates and a plurality of extrusion rollers, and the plurality of extrusion push plates are arranged in an array at equal angles along the circumferential direction of the drill rod, and the extrusion push plates are rotated at equal intervals along the long side direction to arrange a plurality of rows of extrusion rollers; a speed-matching spraying mechanism, which is connected to the drill rod, includes a plurality of steel spikes, and the plurality of steel spikes are respectively arranged in the middle of a plurality of groups of extrusion rollers, and the steel spikes are slidably connected to the extrusion push plates. This device can ensure a reasonable ratio of soil and cement slurry, further improve the quality of the composite foundation, and prevent the collapse of holes.

Description

Technical Field

[0001] The invention relates to the technical field of foundation engineering, and in particular to a composite foundation soft foundation treatment and reinforcement device. Background Art

[0002] In the field of modern construction engineering, composite foundation soft foundation treatment and reinforcement is the core link to ensure the quality and stability of the project. With the rapid development of urbanization and the continuous advancement of infrastructure construction, the demand for soft soil foundation treatment in various construction projects has shown explosive growth. However, the traditional composite foundation soft foundation treatment and reinforcement device has exposed a series of thorny problems in the actual construction process.

[0003] At present, the common reinforcement method mainly relies on the drill rod to stir the cement slurry in the hole to complete the operation. However, in actual operation, when the drill rod is running, the soil on the hole wall is very likely to collapse due to disturbance. When a large amount of soil is mixed into the cement slurry, since the soil is an inert material, too much soil will weaken the bonding force between cement particles. At the same time, the moisture contained in the soil will dilute the cement slurry and reduce its hardness, causing the strength of the mixing pile to drop significantly, seriously affecting the effectiveness of soft foundation reinforcement.

[0004] In addition, if the soil collapse occurs at the bottom of the hole, the consequences will be more serious. This will directly cause the cement slurry to be faulted, the upper and lower cement slurries cannot be effectively connected, and the overall strength of the cement pile will be reduced, making it difficult to meet the design requirements. This not only weakens the improvement and fixation effect of the soft foundation, but may also cause safety hazards such as building foundation settlement and cracking, greatly increasing the subsequent maintenance costs and safety risks.

[0005] It is worth noting that when the soil content is too low, the cement slurry lacks sufficient filling and auxiliary materials, which will lead to increased costs. At the same time, due to the concentration of shrinkage stress, shrinkage cracking is prone to occur, and the difference in mechanical properties with the surrounding soil increases, and the ability to work together becomes poor. As a result, the resulting cement column and hole cannot be well bonded. Summary of the invention

[0006] Based on this, it is necessary to provide a composite foundation soft foundation treatment and reinforcement device to address the existing technical problems.

[0007] In order to solve the problems of the prior art, the technical solution adopted by the present invention is: A composite foundation soft foundation treatment and reinforcement device, comprising: drill; A rod seat, fixedly connected to the drill bit coaxially; Two stirring rods are symmetrical and fixedly connected to the rod base; A drill rod is fixedly connected to an end of the rod base away from the drill bit and has a cavity formed inside; A material guide pipe is coaxially arranged inside the drill rod and is connected to the two stirring rods; The reinforcement mechanism is connected to the drill pipe and includes a plurality of extrusion push plates and a plurality of extrusion rollers. The plurality of extrusion push plates are arranged in an array at equal angles along the circumference of the drill pipe, and the extrusion push plates are arranged with a plurality of rows of extrusion rollers rotating at equal intervals along the long side direction; The speed-matching spraying mechanism is connected with the drill rod and comprises a plurality of steel spikes which are respectively arranged at the middle of a plurality of groups of squeezing rollers and are slidably connected with the squeezing push plates.

[0008] Furthermore, a one-way nozzle is fixedly connected to one end of the stirring rod away from the rod seat.

[0009] Furthermore, the reinforcement mechanism also includes an extrusion head, an axis disk, a plurality of top seats, a plurality of adapters and a plurality of extrusion rods. The extrusion head is key-connected to an end of the drill rod away from the drill bit. The axis disk is arranged at an end of the extrusion head close to the drill bit and is fixedly connected to the drill rod coaxially. A plurality of top seats are arranged in an array at equal angles along the circumferential direction of an end of the axis disk away from the extrusion head. The top seat is fixedly connected to the axis disk. One end of the plurality of adapters is respectively hinged to the plurality of top seats, and the other end is respectively hinged to the plurality of extrusion rods. The plurality of extrusion rods are the output ends of the reinforcement mechanism, and the plurality of extrusion rods drive a plurality of extrusion push plates to move during the movement.

[0010] Furthermore, the reinforcement mechanism also includes a plurality of wedge-shaped bottom blocks, a plurality of wedge-shaped sliding blocks and a plurality of extrusion seats, a plurality of rows of wedge-shaped bottom blocks are arranged at equal angles along the circumferential direction of the drill rod and are fixedly connected to the outer wall of the drill rod, a plurality of rows of wedge-shaped sliding blocks are respectively fixedly connected to the output ends of a plurality of reinforcement mechanisms, a plurality of wedge sliding blocks are respectively slidably connected to a plurality of wedge-shaped bottom blocks, one end of a plurality of extrusion seats is respectively fixedly connected to a plurality of wedge sliding blocks, and the other end is respectively fixedly connected to the corresponding extrusion push plates.

[0011] Furthermore, the material guide pipe includes a main pipe, a transfer pipe, a limit clamp and a sub-pipe. The sub-pipe is fixedly connected to the drill pipe and one end is connected to the two stirring rods. One end of the transfer pipe is slidably connected to the sub-pipe, and the other end is slidably connected to the main pipe. The main pipe is coaxially fixed to the drill pipe. The limit clamp is coaxially fixed to the middle part of the transfer pipe. A through hole is formed in the middle part of the limit clamp. The transfer pipe is the movable end of the material guide pipe, and the sub-pipe is the fixed end of the material guide pipe.

[0012] Furthermore, the speed-matching spraying mechanism also includes a fixed pressure plate, a dynamic pressure plate, a current limiting spring and a plurality of positioning racks. The fixed pressure plate is fixedly connected to the fixed end of the material guide tube, the dynamic pressure plate is fixedly connected to the movable end of the material guide tube, the current limiting spring is coaxially sleeved on the outside of the material guide tube, one end of the current limiting spring is fixedly connected to the fixed pressure plate, and the other end is fixedly connected to the dynamic pressure plate. A plurality of positioning racks are arranged in an array at equal angles along the circumferential direction of the dynamic pressure plate, the positioning rack is fixedly connected to the dynamic pressure plate, and the positioning rack is the input end of the speed-matching spraying mechanism.

[0013] Furthermore, the speed-matching spraying mechanism also includes a plurality of positioning gears, a plurality of first bevel gears, a plurality of second bevel gears, a plurality of third bevel gears, a plurality of fourth bevel gears, a plurality of reversing gear sets and a plurality of transfer racks. The plurality of positioning gears are respectively connected to the input end of the speed-matching spraying mechanism in a transmission manner, the plurality of first bevel gears are respectively fixedly connected coaxially with the plurality of positioning gears, the plurality of second bevel gears are respectively meshed with the plurality of first bevel gears, the plurality of third bevel gears are respectively arranged on the outside of the drill rod and are respectively fixedly connected coaxially with the plurality of second bevel gears, the plurality of fourth bevel gears are respectively meshed with the plurality of third bevel gears, the input ends of the plurality of reversing gear sets are respectively fixedly connected coaxially with the plurality of fourth bevel gears, the plurality of transfer racks are respectively meshed with the output ends of the plurality of reversing gear sets, and the transfer racks are the output end of the speed-matching spraying mechanism.

[0014] Furthermore, the speed-matching spraying mechanism also includes a short adapter shaft and a protective cover. The protective cover is fixedly connected to the outer wall of the drill pipe. The short adapter shaft is slidably connected to the protective cover and one end is fixedly connected to the output end of the speed-matching spraying mechanism. After moving, the short adapter shaft pushes the corresponding steel spikes to extend out of the corresponding extrusion push plate. The short adapter shaft is the movable end of the speed-matching spraying mechanism.

[0015] Furthermore, the speed-matching spraying mechanism also includes a translation plate, a positioning plate and a limit spring. The positioning plate is fixedly connected to one end of the extrusion push plate close to the drill rod. The translation plate is arranged on the side of the positioning plate away from the extrusion push plate and is fixedly connected to the steel spike. The steel spike passes through the positioning plate and is slidingly connected to the extrusion push plate. The limit spring is coaxially sleeved on the outside of the steel spike. One end of the limit spring is fixedly connected to the translation plate, and the other end is fixedly connected to the positioning plate. The movable end of the speed-matching spraying mechanism corresponds to the translation plate.

[0016] Furthermore, the speed-controlled spraying mechanism also includes a bellows, one end of which is fixedly connected to the translation plate, and the other end of which is fixedly connected to the positioning plate.

[0017] Compared with the prior art, the present invention has the following beneficial effects: Firstly, the device adopts a combination of extrusion head, shaft disc, top seat, adapter and extrusion rod, and is driven by an external lifting power source to accurately move the extrusion push plate and extrusion roller to the inner wall of the hole for rolling and compaction. At the same time, the cooperation of the wedge-shaped bottom block and the wedge-shaped slider provides a limit and guide for the movement of the extrusion rod, ensuring the accuracy and stability of the reinforcement action. This design can effectively enhance the density and bearing capacity of the inner wall of the hole, and improve the reinforcement effect of soft foundation treatment; Second: This device can automatically adjust the extension of the steel spikes according to the injection strength of the cement slurry. When the soil content in the hole is too low and the cement slurry flow rate increases, the transfer tube of the guide pipe moves, and through a series of transmissions, the steel spikes are extended to scrape the inner wall of the hole to produce more soil, ensuring a reasonable ratio of soil and cement slurry. This intelligent adjustment function makes the use of materials in the soft foundation treatment process more scientific and reasonable, and further improves the quality of the composite foundation; Third: This device is equipped with two symmetrical stirring rods to fully mix and stir the cement slurry and soil under the drive of the drill rod. The one-way nozzle on the stirring rod prevents the backflow of soil, ensuring the smooth flow of the cement slurry transportation channel, so that the cement slurry can be continuously and stably mixed with the soil, which effectively avoids the fault phenomenon caused by uneven mixing, greatly improves the integrity and stability of the composite foundation, thereby improving the construction quality of soft foundation treatment and reinforcement. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the three-dimensional structure of an embodiment; Figure 2 yes Figure 1 A magnified view of the structure at center; Figure 3 yes Figure 1 A magnified view of the structure at B in the middle; Figure 4 is a front view of an embodiment; Figure 5 is a front half-section view of an embodiment; Figure 6 yes Figure 5 A magnified view of the structure at C in the middle; Figure 7 yes Figure 5 A magnified view of the structure at D in the middle; Figure 8 yes Figure 5 Enlarged view of the structure at E in the middle; Fig. 9 Schematic diagram of the partial structure of the speed-matching spraying mechanism in the embodiment.

[0019] The numbers in the figure are: 1. Drill bit; 2. Drill rod; 3. Rod seat; 5. Material guide tube; 6. Main tube; 7. Adapter tube; 8. Limiting plate; 9. Auxiliary tube; 10. Stirring rod; 11. One-way nozzle; 12. Reinforcement mechanism; 13. Extrusion head; 14. Shaft plate; 15. Top seat; 16. Adapter; 17. Wedge-shaped bottom block; 18. Extrusion rod; 19. Wedge-shaped slider; 20. Extrusion seat; 21. Extrusion push plate; 22. Extrusion roller; 23. Speed ​​spraying mechanism; 24, steel spikes; 25, translation plate; 26, limit spring; 27, positioning plate; 28, corrugated cover; 29, fixed pressure plate; 30, dynamic pressure plate; 31, current limiting spring; 32, positioning rack; 33, positioning gear; 34, first bevel gear; 35, second bevel gear; 36, third bevel gear; 37, fourth bevel gear; 38, reversing gear set; 39, transfer rack; 40, transfer short shaft; 41, protective cover. DETAILED DESCRIPTION

[0020] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0021] refer to Figures 1 to 9 , a composite foundation soft foundation treatment and reinforcement device, comprising: Drill bit 1; The rod seat 3 is coaxially fixed to the drill bit 1; Two stirring rods 10 are symmetrical and fixedly connected to the rod base 3; The drill rod 2 is fixedly connected to the end of the rod base 3 away from the drill bit 1 and has a cavity formed inside; Feed pipe 5 (such as Figure 5 As shown), the coaxial line is arranged inside the drill rod 2 and is connected to the two stirring rods 10; The reinforcement mechanism 12 is connected to the drill rod 2, and includes a plurality of extrusion push plates 21 and a plurality of extrusion rollers 22. The plurality of extrusion push plates 21 are arranged in an array at equal angles along the circumference of the drill rod 2, and the extrusion push plates 21 are rotated at equal intervals along the long side direction to have a plurality of rows of extrusion rollers 22; The speed-matching spraying mechanism 23 is connected to the drill rod 2 and includes a plurality of steel spikes 24 . The plurality of steel spikes 24 are respectively arranged at the middle of a plurality of groups of squeezing rollers 22 . The steel spikes 24 are slidably connected to the squeezing push plate 21 .

[0022] When the device is in operation, the drill rod 2 is driven by an external rotating power source and approaches the construction site. The drill rod 2 rotates and drills the land through the drill bit 1. During this process, part of the soil formed in the borehole is guided out of the hole from bottom to top. After the borehole is formed, cement slurry is sprayed out from the two stirring rods 10 through the guide tube 5. At this time, the drill rod 2 stops moving and only rotates. The cement slurry will mix with the remaining soil in the hole after being sprayed out, and the two stirring rods 10 will mix and stir the cement slurry and soil to prevent faults caused by uneven mixing. In this process, when the borehole reaches a predetermined depth, the drill rod 2 stops moving axially toward the borehole and enters the cement slurry injection and stirring stage. Although the drill bit 1 is still rotating at this stage, it should be clear that the hole formed during the drilling process is not a regular cylindrical shape, but under the action of the drill bit 1, a certain conical structure will be formed at the bottom of the hole. Therefore, when the drill rod 2 stops moving forward, due to the spatial structural characteristics of the drill bit 1 area, even if some of the soil has an upward movement trend driven by the rotation of the drill bit 1, the soil will fall back to the bottom of the hole under the action of gravity. This fall is not irregular, but will form a relatively stable accumulation state at the bottom of the hole, and will not cause the "hollowing out" phenomenon. In addition, during the cement slurry injection process, when the cement slurry is ejected from the guide tube 5 through the stirring rod 10, the cement slurry will form a jet with a certain pressure and flow rate. While this cement slurry jet is mixed with the residual soil in the hole, it will also produce a certain force on the soil in the hole. When the soil falls to the bottom of the hole under the action of gravity, the jet action of the cement slurry and the stirring action of the stirring rod 10 will cause the falling soil to quickly contact and mix with the cement slurry. This dynamic mixing process can ensure that the "hollowing out" phenomenon caused by soil accumulation will not occur in the drill bit 1 area, and at the same time ensure the uniformity of the mixing of cement slurry and soil in the entire borehole.

[0023] During the cement slurry injection process, when the inner wall of the hole needs to be reinforced, the external lifting power source will drive the multiple extrusion push plates 21 to move through the reinforcement mechanism 12 until the multiple extrusion rollers 22 are squeezed on the inner wall of the hole. Then, when the drill rod 2 rotates, the multiple extrusion rollers 22 will roll and compact the inner wall of the hole.

[0024] At the same time, during the drilling process, the construction personnel need to observe the state and amount of the drilled soil. If the amount of soil produced is significantly less than normal, and the soil is relatively dry and loose, without sufficient viscosity and humidity, this means that the soil content is too low. When the soil content in the hole is too low, the injection speed of the cement slurry increases. At this time, under the action of the speed-matching spraying mechanism 23, a number of steel spikes 24 extend and scrape the inner wall of the hole to produce more soil, ensuring a reasonable ratio of soil to cement slurry (and in this process, the drill rod 2 that has stopped moving previously needs to be displaced along the axis of the hole to provide more soil).

[0025] In order to prevent part of the soil from flowing back into the interior of the stirring rod 10 during the rotation of the stirring rod 10, the following features are specifically provided: The end of the stirring rod 10 away from the rod seat 3 is fixedly connected with a one-way nozzle 11. In the process of the drilling rod 2 driving the stirring rod 10 to rotate and mix the cement slurry with the soil, the one-way nozzle 11 plays a key role. It only allows the cement slurry to be sprayed out from the inside of the stirring rod 10 to the outside, and prevents the soil in the hole from flowing back into the stirring rod 10. In this way, the cement slurry conveying channel inside the stirring rod 10 is ensured to be unobstructed, the stirring rod 10 is prevented from being blocked by soil, and the cement slurry can be continuously and stably sprayed from the stirring rod 10 to mix with the soil, thereby improving the reliability of the device operation and the mixing and stirring effect.

[0026] In order to supplement the specific structure of the reinforcement mechanism 12, the following features are also specifically provided: The reinforcement mechanism 12 also includes an extrusion head 13, a shaft disc 14, a plurality of top seats 15, a plurality of adapters 16 and a plurality of extrusion rods 18. The extrusion head 13 is key-connected to the end of the drill rod 2 away from the drill bit 1. The shaft disc 14 is arranged at the end of the extrusion head 13 close to the drill bit 1 and is coaxially fixedly connected to the drill rod 2. The plurality of top seats 15 are arranged in an array at equal angles along the circumferential direction of the end of the shaft disc 14 away from the extrusion head 13. The top seats 15 are fixedly connected to the shaft disc 14. One end of the plurality of adapters 16 is respectively hinged to the plurality of top seats 15, and the other end is respectively hinged to the plurality of extrusion rods 18. The plurality of extrusion rods 18 are the output ends of the reinforcement mechanism 12. The plurality of extrusion rods 18 drive the plurality of extrusion push plates 21 to move during the movement. When the inner wall of the hole needs to be reinforced, an external lifting power source acts on the extrusion head 13. Since the extrusion head 13 is key-connected to the drill rod 2, the movement of the extrusion head 13 will drive the movement of the shaft disc 14. The top seat 15 on the shaft disc 14 moves with the shaft disc 14, and transmits the force to the extrusion rod 18 through the adapter 16. The extrusion rod 18, as the output end of the reinforcement mechanism 12, moves under the drive of the adapter 16, and then drives the extrusion push plate 21 connected thereto to move, so that the extrusion roller 22 on the extrusion push plate 21 can be accurately squeezed on the inner wall of the hole, thereby realizing the reinforcement operation of the inner wall of the hole.

[0027] In order to limit the movement of the plurality of extrusion rods 18, the following features are also specifically provided: The reinforcement mechanism 12 also includes a plurality of wedge-shaped bottom blocks 17, a plurality of wedge-shaped sliders 19 and a plurality of extrusion seats 20. A plurality of rows of wedge-shaped bottom blocks 17 are arranged at equal angles along the circumferential direction of the drill rod 2 and are fixedly connected to the outer wall of the drill rod 2. A plurality of rows of wedge-shaped sliders 19 are respectively fixedly connected to a plurality of extrusion rods 18. A plurality of wedge-shaped sliders 19 are respectively slidably connected to a plurality of wedge-shaped bottom blocks 17. One end of a plurality of extrusion seats 20 is respectively fixedly connected to a plurality of wedge-shaped sliders 19, and the other end is respectively fixedly connected to a corresponding extrusion push plate 21. In the process of the extrusion rod 18 moving and driving the extrusion push plate 21 to move, the cooperation between the wedge-shaped slider 19 and the wedge-shaped bottom block 17 plays a role of limiting and guiding. The wedge-shaped slider 19 slides on the wedge-shaped bottom block 17 to ensure that the extrusion rod 18 can only move in a specific direction, thereby ensuring that the extrusion push plate 21 can accurately approach or move away from the inner wall of the hole (at this time, the moving trajectory of the extrusion push plate 21 is an oblique movement). At the same time, the extrusion seat 20 connects the wedge-shaped slider 19 and the extrusion push plate 21, so that the movement of the wedge-shaped slider 19 can be stably transmitted to the extrusion push plate 21, ensuring the accuracy and stability of the action of the reinforcement mechanism 12.

[0028] In order to supplement the specific structure of the material guide tube 5, the following features are also specifically provided: The guide pipe 5 includes a main pipe 6, a transfer pipe 7, a limit card plate 8 and a sub-pipe 9. The sub-pipe 9 is fixedly connected to the drill pipe 2 and one end of the sub-pipe is connected to the two stirring rods 10. One end of the transfer pipe 7 is slidably connected to the sub-pipe 9, and the other end is slidably connected to the main pipe 6. The main pipe 6 is coaxially fixed to the drill pipe 2. The limit card plate 8 is coaxially fixed to the middle part of the transfer pipe 7. A through hole is formed in the middle part of the limit card plate 8. The transfer pipe 7 is the movable end of the guide pipe 5, and the sub-pipe 9 is the fixed end of the guide pipe 5. During the cement slurry transportation process, the main pipe 6 plays a role in stabilizing the cement slurry transportation path to ensure that the cement slurry can flow smoothly to the stirring rods 10. As a movable end, the transfer pipe 7 can slide within a certain range to adapt to some changes during the operation of the device. When the cement slurry injection flow is fast, the fast-flowing cement slurry will generate a large pressure on the end of the transfer pipe 7 close to the main pipe 6, pushing the transfer pipe 7 to move toward the sub-pipe 9.

[0029] In order to supplement the specific structure of the speed-matching spraying mechanism 23, so that when the cement slurry injection intensity increases, the transfer tube 7 can move, thereby providing power for starting the speed-matching spraying mechanism 23, the following features are also specifically set: The speed-matching spraying mechanism 23 also includes a fixed pressure plate 29, a dynamic pressure plate 30, a current limiting spring 31 and a plurality of positioning racks 32. The fixed pressure plate 29 is fixedly connected to the auxiliary pipe 9, the dynamic pressure plate 30 is fixedly connected to the transfer tube 7, the current limiting spring 31 is coaxially sleeved on the outside of the guide tube 5, one end of the current limiting spring 31 is fixedly connected to the fixed pressure plate 29, and the other end is fixedly connected to the dynamic pressure plate 30. A plurality of positioning racks 32 are arranged in an array at equal angles along the circumferential direction of the dynamic pressure plate 30, the positioning rack 32 is fixedly connected to the dynamic pressure plate 30, and the positioning rack 32 is the input end of the speed-matching spraying mechanism 23. When the cement slurry injection intensity increases, the cement slurry generates a greater pressure on the transfer tube 7, and the transfer tube 7 as the active end of the guide tube 5 will move. The dynamic pressure plate 30 moves with the transfer tube 7 and compresses the current limiting spring 31. The current limiting spring 31 plays a role of buffering and regulation, preventing the dynamic pressure plate 30 from moving too fast and preparing for the reset of the transfer tube 7. At the same time, the movement of the dynamic pressure plate 30 drives the movement of the positioning rack 32. The positioning rack 32 serves as the input end of the speed-matching spraying mechanism 23, converts the movement of the transfer tube 7 into power input for subsequent actions of the speed-matching spraying mechanism 23, and provides a prerequisite for the extension of the steel spikes 24.

[0030] In order to supplement the specific structure of the speed-matching spraying mechanism 23, the following features are also specifically provided: The speed-matching spraying mechanism 23 further includes a plurality of positioning gears 33, a plurality of first bevel gears 34, a plurality of second bevel gears 35, a plurality of third bevel gears 36, a plurality of fourth bevel gears 37, a plurality of reversing gear sets 38 and a plurality of transfer racks 39, wherein the plurality of positioning gears 33 are respectively meshed with the plurality of positioning racks 32, the plurality of first bevel gears 34 are respectively coaxially fixedly connected with the plurality of positioning gears 33, the plurality of second bevel gears 35 are respectively meshed with the plurality of first bevel gears 34, the plurality of third bevel gears 36 are respectively arranged on the outer side of the drill rod 2 and are coaxially fixedly connected with the plurality of second bevel gears 35, the plurality of fourth bevel gears 37 are respectively meshed with the plurality of third bevel gears 36, the input ends of the plurality of reversing gear sets 38 are respectively coaxially fixedly connected with the plurality of fourth bevel gears 37, the plurality of transfer racks 39 are respectively meshed with the output ends of the plurality of reversing gear sets 38, and the transfer racks 39 are the output ends of the speed-matching spraying mechanism 23. When the positioning rack 32 moves, the positioning rack 32 drives the positioning gear 33 connected thereto to rotate. The rotation of the positioning gear 33 drives the first bevel gear 34 fixedly connected to the coaxial line to rotate, and the first bevel gear 34 meshes with the second bevel gear 35 to transmit power to the second bevel gear 35. The second bevel gear 35 drives the third bevel gear 36 fixedly connected to the coaxial line to rotate, and the third bevel gear 36 meshes with the fourth bevel gear 37 to transmit power to the fourth bevel gear 37. The fourth bevel gear 37 drives the transfer rack 39 to move through the reversing gear set 38. The transfer rack 39, as the output end of the speed-matching spraying mechanism 23, transmits power to subsequent components to realize the extension action of the steel spike 24.

[0031] In order to prevent the mud and cement slurry in the hole from interfering with the movement of the transfer rack 39, the following features are also specifically provided: The speed-matching spraying mechanism 23 also includes a transfer short shaft 40 and a protective cover 41. The protective cover 41 is fixedly connected to the outer wall of the drill rod 2. The transfer short shaft 40 is slidably connected to the protective cover 41 and one end is fixedly connected to the transfer rack 39. After the transfer short shaft 40 moves, it pushes the corresponding steel spike 24 to extend from the corresponding extrusion push plate 21. The transfer short shaft 40 is the movable end of the speed-matching spraying mechanism 23. When the transfer rack 39 moves, the transfer rack 39 drives the transfer short shaft 40 fixedly connected thereto to move. The protective cover 41 plays a role in protecting the transfer short shaft 40 and the transfer rack 39, preventing the soil and cement slurry in the hole from interfering with the movement of the transfer short shaft 40, and ensuring that the transfer short shaft 40 can move smoothly. As the movable end of the speed-matching spraying mechanism 23, the transfer short shaft 40 can accurately push the corresponding steel spike 24 to extend from the extrusion push plate 21 after moving, so as to achieve the scraping operation on the inner wall of the hole.

[0032] In order to limit the movement of the steel spikes 24 and ensure that the steel spikes 24 do not scrape the inner wall of the hole when the squeezing rollers 22 roll and squeeze the inner wall of the hole, the following features are specifically provided: The speed-controlled spraying mechanism 23 further includes a translation plate 25, a positioning plate 27 and a limit spring 26. The positioning plate 27 is fixedly connected to one end of the extrusion push plate 21 close to the drill rod 2. The translation plate 25 is arranged on the side of the positioning plate 27 away from the extrusion push plate 21 and is fixedly connected to the steel spike 24. The steel spike 24 is slidably connected to the extrusion push plate 21 after passing through the positioning plate 27. The limit spring 26 is coaxially sleeved on the outside of the steel spike 24. One end of the limit spring 26 is fixedly connected to the translation plate 25, and the other end is fixedly connected to the positioning plate 27. A plurality of transfer short shafts 40 correspond to a plurality of translation plates 25. Under normal circumstances, the limit spring 26 is in a normal state, ensuring that when the plurality of extrusion rollers 22 roll and extrude the inner wall of the hole, the plurality of steel spikes 24 will not scrape the inner wall of the hole. When the transfer short shaft 40 moves and pushes the translation plate 25 (it should be noted that the transfer short shaft 40 and the translation plate 25 are designed as separate parts, and the contact is point-surface contact, thereby ensuring that after the translation plate 25 moves with the extrusion push plate 21, the transfer short shaft 40 can still contact the translation plate 25 when moving), the translation plate 25 overcomes the elastic force of the limit spring 26 and drives the steel spike 24 to extend from the extrusion push plate 21. The setting of the limit spring 26 plays a role of limiting and buffering, ensuring that the extension and retraction of the steel spike 24 are stable and reliable.

[0033] In order to protect the steel spike 24 and the limit spring 26, the following features are also specifically provided: The speed-matching spraying mechanism 23 further includes a bellows 28, one end of which is fixedly connected to the translation plate 25, and the other end of which is fixedly connected to the positioning plate 27. When the steel spike 24 moves along with the translation plate 25, the bellows 28 can protect the steel spike 24 and the limit spring 26. It can prevent the soil and cement slurry in the hole from entering the area where the steel spike 24 and the limit spring 26 are located, and avoid the soil and cement slurry from affecting the sliding of the steel spike 24 and the elastic performance of the limit spring 26, thereby extending the service life of the steel spike 24 and the limit spring 26 and ensuring the normal operation of the speed-matching spraying mechanism 23.

[0034] The working principle of the device is that when performing composite foundation soft foundation treatment and reinforcement operations, the drill rod 2 of the device will first be driven by an external rotary power source. When the drill rod 2 approaches the construction location, it starts to rotate, and the drill bit 1 installed at one end of the drill rod 2 rotates accordingly and performs drilling operations on the land. During the drilling process, the drill bit 1 continuously breaks up the soil, and part of the soil formed in the borehole will be guided out of the hole from bottom to top. As the borehole goes deeper, when it reaches a suitable depth, the drilling operation is completed.

[0035] At this time, the cement slurry is transported through the guide pipe 5. The guide pipe 5 is composed of a main pipe 6, a transfer pipe 7, a limit clamp 8 and a sub-pipe 9. The cement slurry first enters the main pipe 6, then passes through the slidable transfer pipe 7 and the sub-pipe 9, and finally sprays out from the two stirring rods 10 connected to the sub-pipe 9. A one-way nozzle 11 is fixedly connected to the end of the stirring rod 10 away from the rod seat 3 to ensure that the cement slurry can only be sprayed out from the stirring rod 10 to prevent the soil from flowing back into the stirring rod 10. At the same time, the drill rod 2 that has stopped moving previously needs to be displaced along the axis of the hole in order to provide more soil. Driven by the drill rod 2, the two stirring rods 10 mix and stir the sprayed cement slurry and the soil remaining in the hole to avoid faults caused by uneven mixing.

[0036] When the inner wall of the hole needs to be reinforced, the external lifting power source comes into play. The extrusion head 13 in the reinforcement mechanism 12 is key-connected to the drill rod 2, and the external lifting power source drives the extrusion head 13 to move, thereby driving the shaft disc 14 to move. The top seat 15 on the shaft disc 14 drives the extrusion rod 18 to move through the adapter 16. The extrusion rod 18, as the output end of the reinforcement mechanism 12, drives the extrusion push plate 21 connected thereto to move. During the movement of the extrusion rod 18, the wedge-shaped slider 19 slides on the wedge-shaped bottom block 17, playing a limiting and guiding role, ensuring that the extrusion push plate 21 is accurately close to the inner wall of the hole, so that the several extrusion rollers 22 on the extrusion push plate 21 are squeezed on the inner wall of the hole. Subsequently, the rotation of the drill rod 2 drives the extrusion rollers 22 to roll and compact the inner wall of the hole to enhance the stability of the inner wall of the hole.

[0037] During the drilling process, construction personnel need to observe the state and quantity of the drilled slag. If the amount of slag is significantly less than normal, and the slag is relatively dry and loose, without sufficient viscosity and humidity, it means that the soil content is too low. When the soil content in the hole is too low, the flow rate of cement slurry injection needs to be increased. At this time, the speed-matching spraying mechanism 23 starts to work. The cement slurry exerts a large pressure on the transfer tube 7, and the transfer tube 7 moves as the active end of the guide tube 5, driving the dynamic pressure plate 30 to move and compress the current limiting spring 31. The movement of the dynamic pressure plate 30 moves the positioning rack 32, and the positioning rack 32 drives the positioning gear 33 to rotate, and finally moves the transfer rack 39. The transfer rack 39 drives the transfer short shaft 40 to slide in the protective cover 41, and the transfer short shaft 40 pushes the translation plate 25. The translation plate 25 overcomes the elastic force of the limit spring 26 and drives the steel thorn 24 to extend from the extrusion push plate 21. After the steel spikes 24 are extended, they scrape the inner wall of the hole to produce more soil, ensuring a reasonable ratio of soil to cement slurry. At the same time, because the injection speed of the cement slurry will increase when the steel spikes 24 are extended, the cement slurry at this time will exert greater pressure and impact force on the hole wall in a short period of time, which poses a serious threat to the stability of the hole wall. The steel spikes 24 extend and scrape the inner wall of the hole, which can form a buffer layer on the surface of the inner wall of the hole that is a preliminary mixture of loose soil and cement slurry. On the one hand, this buffer layer increases the internal friction of the soil on the inner wall of the hole and improves the shear strength of the soil; on the other hand, it can disperse the impact force when the cement slurry is injected, convert concentrated stress into distributed stress, effectively reduce the risk of collapse of the inner wall of the hole, and provide reliable protection for construction safety.

[0038] The above embodiments only express one or several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. A composite foundation soft foundation treatment and reinforcement device, characterized in that: include: Drill bit (1); A rod seat (3) is coaxially fixedly connected to the drill bit (1); Two stirring rods (10) are symmetrical and fixedly connected to the rod base (3); A drill rod (2) is fixedly connected to an end of a rod seat (3) away from the drill bit (1) and has a cavity formed inside; A material guide pipe (5) is coaxially arranged inside the drill rod (2) and is connected to the two stirring rods (10); The reinforcement mechanism (12) is connected to the drill rod (2), and comprises a plurality of extrusion push plates (21) and a plurality of extrusion rollers (22). The plurality of extrusion push plates (21) are arranged in an array at equal angles along the circumference of the drill rod (2), and the extrusion push plates (21) are arranged to rotate at equal intervals along the long side direction with a plurality of rows of extrusion rollers (22); The speed-controlled spraying mechanism (23) is connected to the drill rod (2) and comprises a plurality of steel spikes (24). The plurality of steel spikes (24) are respectively arranged at the middle of a plurality of groups of squeezing rollers (22). The steel spikes (24) are slidably connected to the squeezing push plate (21).

2. A composite foundation soft foundation treatment and reinforcement device according to claim 1, characterized in that: One end of the stirring rod (10) away from the rod seat (3) is fixedly connected to a one-way spray head (11).

3. The composite foundation soft foundation treatment and reinforcement device according to claim 1, characterized in that: The reinforcement mechanism (12) further comprises an extrusion head (13), an axis disk (14), a plurality of top seats (15), a plurality of adapters (16) and a plurality of extrusion rods (18); the extrusion head (13) is key-connected to an end of the drill rod (2) away from the drill bit (1); the axis disk (14) is arranged at an end of the extrusion head (13) close to the drill bit (1) and is coaxially fixedly connected to the drill rod (2); the plurality of top seats (15) are arranged in an array at equal angles along the circumferential direction of the end of the axis disk (14) away from the extrusion head (13); the top seats (15) are fixedly connected to the axis disk (14); one end of the plurality of adapters (16) is respectively hinged to the plurality of top seats (15) and the other end is respectively hinged to the plurality of extrusion rods (18); the plurality of extrusion rods (18) are output ends of the reinforcement mechanism (12); and the plurality of extrusion rods (18) drive the plurality of extrusion push plates (21) to move during movement.

4. The composite foundation soft foundation treatment and reinforcement device according to claim 1, characterized in that: The reinforcement mechanism (12) further comprises a plurality of wedge-shaped bottom blocks (17), a plurality of wedge-shaped sliding blocks (19) and a plurality of extrusion seats (20); a plurality of rows of wedge-shaped bottom blocks (17) are arranged at equal angles along the circumferential direction of the drill rod (2) and are fixedly connected to the outer wall of the drill rod (2); a plurality of rows of wedge-shaped sliding blocks (19) are respectively fixedly connected to the output ends of the plurality of reinforcement mechanisms (12); a plurality of wedge-shaped sliding blocks (19) are respectively slidably connected to the plurality of wedge-shaped bottom blocks (17); one end of the plurality of extrusion seats (20) is respectively fixedly connected to the plurality of wedge-shaped sliding blocks (19) and the other end is respectively fixedly connected to the corresponding extrusion push plates (21).

5. The composite foundation soft foundation treatment and reinforcement device according to claim 1, characterized in that: The material guide pipe (5) comprises a main pipe (6), a transfer pipe (7), a limit clamping plate (8) and a secondary pipe (9). The secondary pipe (9) is fixedly connected to the drill rod (2) and one end of the secondary pipe is connected to the two stirring rods (10). One end of the transfer pipe (7) is slidably connected to the secondary pipe (9) and the other end is slidably connected to the main pipe (6). The main pipe (6) is coaxially fixedly connected to the drill rod (2). The limit clamping plate (8) is coaxially fixedly connected to the middle part of the transfer pipe (7). A through hole is formed in the middle part of the limit clamping plate (8). The transfer pipe (7) is the movable end of the material guide pipe (5), and the secondary pipe (9) is the fixed end of the material guide pipe (5).

6. The composite foundation soft foundation treatment and reinforcement device according to claim 1, characterized in that: The speed-matching spraying mechanism (23) further comprises a fixed pressure plate (29), a dynamic pressure plate (30), a current limiting spring (31) and a plurality of positioning racks (32); the fixed pressure plate (29) is fixedly connected to the fixed end of the material guide tube (5); the dynamic pressure plate (30) is fixedly connected to the movable end of the material guide tube (5); the current limiting spring (31) is coaxially sleeved on the outside of the material guide tube (5); one end of the current limiting spring (31) is fixedly connected to the fixed pressure plate (29) and the other end is fixedly connected to the dynamic pressure plate (30); a plurality of positioning racks (32) are arranged in an array at equal angles along the circumferential direction of the dynamic pressure plate (30); the positioning racks (32) are fixedly connected to the dynamic pressure plate (30); and the positioning racks (32) are the input end of the speed-matching spraying mechanism (23).

7. The composite foundation soft foundation treatment and reinforcement device according to claim 1, characterized in that: The speed-matching spraying mechanism (23) further comprises a plurality of positioning gears (33), a plurality of first bevel gears (34), a plurality of second bevel gears (35), a plurality of third bevel gears (36), a plurality of fourth bevel gears (37), a plurality of reversing gear sets (38) and a plurality of transfer racks (39). The plurality of positioning gears (33) are respectively connected to the input end of the speed-matching spraying mechanism (23) in a transmission manner, the plurality of first bevel gears (34) are respectively connected to the plurality of positioning gears (33) coaxially, and the plurality of second bevel gears (35) are respectively connected to the plurality of third bevel gears (36), a plurality of fourth bevel gears (37), a plurality of reversing gear sets (38) and a plurality of transfer racks (39). A plurality of third bevel teeth (36) are respectively arranged on the outside of the drill rod (2) and are coaxially fixedly connected to the plurality of second bevel teeth (35); a plurality of fourth bevel teeth (37) are respectively meshed with the plurality of third bevel teeth (36); the input ends of the plurality of reversing gear sets (38) are respectively coaxially fixedly connected to the plurality of fourth bevel teeth (37); a plurality of transfer racks (39) are respectively meshed with the output ends of the plurality of reversing gear sets (38); and the transfer racks (39) are the output ends of the speed-matching spraying mechanism (23).

8. The composite foundation soft foundation treatment and reinforcement device according to claim 1, characterized in that: The speed-matching spraying mechanism (23) further comprises a short adapter shaft (40) and a protective cover (41), wherein the protective cover (41) is fixedly connected to the outer wall of the drill rod (2), the short adapter shaft (40) is slidably connected to the protective cover (41) and one end of the short adapter shaft (40) is fixedly connected to the output end of the speed-matching spraying mechanism (23), and after the short adapter shaft (40) moves, it pushes the corresponding steel spike (24) to extend out from the corresponding extrusion push plate (21), and the short adapter shaft (40) is the movable end of the speed-matching spraying mechanism (23).

9. The composite foundation soft foundation treatment and reinforcement device according to claim 1, characterized in that: The speed-matching spraying mechanism (23) further comprises a translation plate (25), a positioning plate (27) and a limit spring (26). The positioning plate (27) is fixedly connected to one end of the extrusion push plate (21) close to the drill rod (2). The translation plate (25) is arranged on a side of the positioning plate (27) away from the extrusion push plate (21) and is fixedly connected to the steel spike (24). The steel spike (24) passes through the positioning plate (27) and is slidably connected to the extrusion push plate (21). The limit spring (26) is coaxially sleeved on the outside of the steel spike (24). One end of the limit spring (26) is fixedly connected to the translation plate (25), and the other end is fixedly connected to the positioning plate (27). The movable end of the speed-matching spraying mechanism (23) corresponds to the translation plate (25).

10. A composite foundation soft foundation treatment and reinforcement device according to claim 9, characterized in that: The speed-controlled spraying mechanism (23) further comprises a bellows (28), one end of which is fixedly connected to the translation plate (25) and the other end of which is fixedly connected to the positioning plate (27).

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