Tunnel bottom expansion bored pile construction support equipment

Abstract

The application relates to the technical field of tunnel construction, in particular to a tunnel bottom-expanding bored pile construction supporting equipment, which comprises a tunnel top and a digging device main body, the digging device main body is located on the tunnel top, the use of a hole punching and bottom-expanding assembly and a synchronous shifting assembly enables the integration of digging and bottom-expanding when the tunnel top is dug into a shaft, the shifting of a shifting belt ring on a supporting module enables the supporting module to keep consistent with the speed of the digging shaft, and before the supporting module is supported, a resilient connecting belt tamps and cuts the inner sidewall of the shaft, and a cutting head trims the inner sidewall of the shaft, then after the shaft is completely dug, the resilient connecting belt slightly knocks the inner sidewall of the supporting module again, the close-fitting degree of the supporting module and the inner sidewall of the shaft is increased, so that the device is more stable and reliable when the shaft is dug in a region with relatively soft soil.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tunnel construction, in particular to a tunnel bottom expansion bored pile construction supporting equipment. BACKGROUND

[0002] The tunnel bottom expansion bored pile is a foundation construction technology used in tunnel engineering to enhance the bearing capacity of the foundation and control settlement, which is widely used in soft ground or structures requiring large loads. The end of the soil or rock is expanded, and then poured to expand the bearing area and reduce the risk of settlement deformation.

[0003] After searching, the patent with the publication number CN118407715A discloses a tunnel vault drilling device, which is described as "including a mobile frame, a support foot automatic unfolding assembly, an angle adjusting assembly and a drilling device. The bottom of the mobile frame is provided with a support bottom plate, and the top of the mobile frame is provided with a support vertical plate. One end of the support bottom plate is provided with a stable support foot. The support foot automatic unfolding assembly is arranged on the support bottom plate and connected with the stable support foot. The support foot automatic unfolding assembly includes a downward trigger piece which is arranged on the support bottom plate in a lifting manner. The drilling device is connected with the angle adjusting assembly, and the angle adjusting assembly is arranged on the support vertical plate. The mobile frame is light and small, and cooperates with the support foot automatic unfolding assembly to realize stable and rapid erection of the drilling device, which is suitable for small space drilling operation. The angle of the drilling device is quickly adjusted by the angle adjusting assembly, without the need for manual continuous participation, greatly reducing the labor intensity and improving the drilling efficiency".

[0004] The above-mentioned patent still has some deficiencies in actual use. When drilling inside the tunnel, if the soil is soft, the shaft excavated may collapse, and the soil may fall, which not only affects the progress of excavation, but in serious cases, may cause ground subsidence and damage surrounding buildings, causing huge property losses to the surroundings.

[0005] Therefore, the present application discloses a tunnel bottom expansion bored pile construction supporting equipment. SUMMARY

[0006] To solve the problems of the tunnel drilling in the background art, when the soil is soft, the shaft wall may collapse and the soil may fall, which not only affects the progress of excavation, but also may cause ground subsidence and damage to surrounding buildings, causing huge property losses, the present application provides a tunnel bottom expansion bored pile construction supporting equipment, which comprises a tunnel top and a digging device main body, the digging device main body is located in the tunnel top, the control driving module is fixedly connected to the top of the digging device main body, and the driving shaft is fixedly connected to the output end of the control driving module;

[0007] The punching and bottom expansion assembly is located outside the bottom of the driving shaft and inside the tunnel top, and the punching and bottom expansion assembly comprises a knocking and flattening mechanism, an inner wall supporting mechanism and a recycling guiding mechanism, and the knocking and flattening mechanism and the inner wall supporting mechanism are used in cooperation.

[0008] The synchronous shifting assembly is located on one side of the driving shaft, and the synchronous shifting assembly comprises an angle adjusting mechanism and a transmission mechanism, and the angle adjusting mechanism and the transmission mechanism are used in cooperation.

[0009] Preferably, the punching and bottom expansion assembly comprises an intelligent length adjusting module, a protection cylinder A, a protection cylinder B, a bottom expansion tooth, a connecting piece, a sliding ring, a hinged block, a through hole and a drill bit, the intelligent length adjusting module is fixedly connected to the bottom end of the driving shaft, the protection cylinder A is rotatably connected to the outside of the intelligent length adjusting module, the drill bit is slidably connected to the inside of the intelligent length adjusting module, the protection cylinder B is rotatably connected to the bottom outside of the intelligent length adjusting module, the bottom expansion tooth is hingedly connected to the bottom of the protection cylinder B, the connecting piece is hingedly connected to the outside of the middle part of the bottom expansion tooth, the sliding ring is slidably connected to the outside of the through hole, two groups of hinged blocks are connected to the outside of the sliding ring, the connecting piece is hingedly connected to the hinged block away from the bottom expansion tooth, and the through hole is formed in the inside of the drill bit.

[0010] Preferably, the knocking and flattening mechanism comprises a mounting ring A, a transmission gear, a shifting tooth, a driving gear, an eccentric wheel, a compensation groove, an extension rod A, a vibrating plate, a partition plate and an elastic connecting belt, the mounting ring A is rotatably connected to the top of the outside of the protection cylinder B, the mounting ring A is rotatably connected to the bottom of the protection cylinder A away from the protection cylinder B, the shifting tooth is fixedly connected to the outside of the intelligent length adjusting module close to the transmission gear, the shifting tooth is meshed with the transmission gear, the driving gear is rotatably connected to the top of the outside of the mounting ring A, the eccentric wheel is fixedly connected to the top of the driving gear, the driving gear is meshed with the transmission gear, the extension rod A is fixedly connected to the middle part of the outside of the mounting ring A, the vibrating plate is fixedly connected to the extension rod A, a plurality of elastic connecting belts are mounted on the outside of the vibrating plate, and the elastic connecting belts are connected by the partition plate.

[0011] Preferably, the inner wall supporting mechanism comprises support modules, buckles, cutting knife heads, through grooves and limiting columns, a plurality of groups of support modules are installed on the inner side of the tunnel top, the cutting knife heads are fixedly connected to the outer side bottom of the support modules, a plurality of groups of through grooves are formed in the cutting knife heads, and the limiting columns are slidably connected in the through grooves; buckles are fixedly connected to the outer side top of the support modules, and the buckles can make the splicing between the plurality of groups of support modules more stable and reliable.

[0012] Preferably, the recycling guiding mechanism comprises guiding grooves, the guiding grooves are located on the inner side of the support modules, and when the support modules are spliced, the guiding grooves form a spiral channel.

[0013] Preferably, the synchronous shifting assembly comprises support frames, square grooves, bevel gears, fixed frames and a driving shaft, two groups of support frames are fixedly connected to the outer side top of the tunnel top, the square grooves are formed in the inner side of the support frames, the fixed frames are fixedly connected to the outer side middle of the support frames, and the bevel gears are fixedly installed on one side of the driving shaft close to the square grooves.

[0014] Preferably, the angle adjusting mechanism comprises a bevel gear A, a universal joint, a rotating shaft, a hard special-shaped cylinder, and an extension rod B, the bevel gear A is rotatably connected to the inner side middle of the fixed frame, the bevel gear A is meshed with the bevel gear, and the universal joint is hinged to one end of the bevel gear A away from the bevel gear; the universal joint rotates in the fixed frame, the rotating shaft is hinged to one end of the universal joint away from the bevel gear A, the extension rod B is fixedly connected to the outer side bottom of the support frame, the hard special-shaped cylinder is fixedly connected to the extension rod B, and the rotating shaft is rotatably connected in the hard special-shaped cylinder.

[0015] Preferably, the transmission mechanism comprises a bevel gear B, a shifting shaft, a rotating tooth shaft, a shifting belt ring, and a gear groove, the bevel gear B is fixedly connected to the outer side bottom of the rotating shaft, the rotating tooth shaft is rotatably connected in the hard special-shaped cylinder, the shifting shaft is rotatably connected to the inner side bottom of the hard special-shaped cylinder, the bevel gear B is meshed with the rotating tooth shaft in the middle, the gear groove is formed in the outer side of the shifting shaft close to the rotating tooth shaft, the gear groove is meshed with the rotating tooth shaft, and the shifting belt ring is rotatably connected to the outer side of the shifting shaft.

[0016] Preferably, the damping rod is fixedly connected to the outer side top of the protection cylinder B, and the extension end of the damping rod is fixedly connected with the drill bit.

[0017] Compared with the prior art, the present application has the following advantages:

[0018] 1. In the tunnel bottom expansion and grouting bored pile construction support equipment, the use of the drilling and bottom expansion assembly and the synchronous toggle assembly makes it possible to integrate excavation and bottom expansion when digging the vertical shaft at the tunnel top, and then use the toggle belt ring to toggle the support module so that the support module is consistent with the speed of digging the vertical shaft, further reducing the possibility of vertical shaft collapse during the excavation process. Before the support module supports, the elastic connecting belt compacts the inner wall of the vertical shaft and the cutting head trims the inner wall of the vertical shaft. After the vertical shaft excavation is completed, the elastic connecting belt slightly taps the inner wall of the support module again, thereby increasing the close fit between the support module and the inner wall of the vertical shaft, making the device more stable and reliable when digging the vertical shaft in an area with relatively soft soil, reducing the possibility of shaft wall collapse and soil falling during the excavation process, and enhancing the practicality and reliability of the device.

[0019] 2. In the tunnel bottom expansion and grouting bored pile construction support equipment, the drill bit is supported by the shock-absorbing rod, making the drill bit more stable and reliable when excavating the vertical shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a structural schematic diagram of the tunnel top of the present invention;

[0022] Figure 3 It is a structural schematic diagram of the drive shaft of the present invention;

[0023] Figure 4 It is a structural schematic diagram of the support frame of the present invention;

[0024] Figure 5 Schematic diagram of the structure of the connecting piece of the present invention;

[0025] Figure 6 Schematic diagram of the structure of the protective tube A of the present invention;

[0026] Figure 7 Schematic diagram of the structure of the elastic connecting belt of the present invention;

[0027] Figure 8 It is a structural schematic diagram of the transmission gear of the present invention;

[0028] Figure 9 It is a structural schematic diagram of the support module of the present invention;

[0029] Figure 10 For the present invention Figure 3 A magnified view of point A;

[0030] Figure 11 For the present invention Figure 4Enlarged view of B at C;

[0031] Figure 12 The tunnel expansion bottom filling drilling pile construction support equipment of the present application Figure 7 Enlarged view of C at D.

[0032] The meanings of various reference signs in the drawings are as follows:

[0033] 1, tunnel top; 2, excavating device main body; 3, control driving module; 4, driving shaft; 5, intelligent length adjusting module; 6, protection cylinder A; 7, protection cylinder B; 8, expansion bottom tooth; 9, connecting piece; 10, sliding ring; 11, hinged block; 12, through hole; 13, drill bit; 14, mounting ring A; 15, transmission gear; 16, shifting tooth; 17, driving gear; 18, eccentric wheel; 19, compensation groove; 20, telescopic rod A; 21, oscillating plate; 22, partition plate; 23, elastic connecting belt; 24, support module; 25, buckle; 26, guide groove; 27, cutting tool bit; 28, through groove; 29, limiting column; 30, support frame; 31, square groove; 32, bevel gear ring; 33, fixed frame; 34, bevel gear A; 35, universal joint; 36, rotating shaft; 37, hard special-shaped cylinder; 38, telescopic rod B; 39, bevel gear B; 40, shifting shaft; 41, rotating tooth shaft; 42, shifting belt ring; 43, gear groove; 44, shock absorbing rod. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0035] When drilling inside the tunnel, in the case of soft soil, the shaft excavated may collapse, and the soil may fall, which not only affects the progress of excavation, but in severe cases, may cause ground subsidence, damage surrounding buildings, and cause huge property losses to the surroundings.

[0036] Therefore, the present application provides a tunnel expansion bottom filling drilling pile construction support equipment, as shown in Figures 1-12 which comprises a tunnel top 1 and an excavating device main body 2. The excavating device main body 2 is located at the top of the tunnel top 1. A control driving module 3 is fixedly connected to the top of the excavating device main body 2. A driving shaft 4 is fixedly connected to the output end of the control driving module 3.

[0037] The punching and bottom expanding assembly is located at the bottom outside the drive shaft 4 and inside the tunnel top 1. The punching and bottom expanding assembly includes a knocking and leveling mechanism, an inner wall support mechanism, and a recovery guide mechanism. The knocking and leveling mechanism and the inner wall support mechanism cooperate with each other.

[0038] The synchronous toggle assembly is located on the outer side of the drive shaft 4. The synchronous toggle assembly includes an angle adjustment mechanism and a transmission mechanism, and the angle adjustment mechanism and the transmission mechanism are used in conjunction with each other.

[0039] The drilling and bottom expansion assembly includes an intelligent length adjustment module 5, a protective tube A6, a protective tube B7, a bottom expansion tooth 8, a connecting piece 9, a sliding ring 10, a hinge block 11, a through hole 12, and a drill bit 13. The bottom end of the drive shaft 4 is fixedly connected to the intelligent length adjustment module 5. The function of the intelligent length adjustment module 5 is that the staff can adjust the protruding length of the drill bit 13 inside the intelligent length adjustment module 5 through external electrical control. It is a prior art and should be well known to those in this technical field. Therefore, it will not be described in detail in this technical solution. The outer side of the intelligent length adjustment module 5 is rotatably connected to the protective tube A6. A metal telescopic tube is provided in the middle of the tube A6, which is used to connect the upper and bottom parts of the protective tube A6 to realize the telescopic property of the protective tube A6. A drill bit 13 is slidably connected to the inner side of the intelligent length adjustment module 5. A protective tube B7 is rotatably provided on the outer side of the bottom of the intelligent length adjustment module 5. The bottom of the protective tube B7 is hinged with bottom expansion teeth 8 on both sides, and a connecting piece 9 is hinged with the middle part of the outer side of the bottom expansion teeth 8. A sliding ring 10 is slidably connected to the outer side of the through hole 12. Two groups of hinge blocks 11 are connected to the outer side of the sliding ring 10. The connecting piece 9 is hinged to the hinge block 11 at one end away from the bottom expansion teeth 8, and a through hole 12 is provided on the inner side of the drill bit 13.

[0040] The knocking and leveling mechanism includes a mounting ring A14, a transmission gear 15, a toggle tooth 16, a driving gear 17, an eccentric wheel 18, a compensation groove 19, a telescopic rod A20, an oscillation plate 21, a partition 22, and an elastic connecting belt 23. The top of the outer side of the protective tube B7 is rotatably connected to the mounting ring A14, and the mounting ring A14 rotates at the bottom of the protective tube A6 away from the end of the protective tube B7. The outer side of the intelligent length adjustment module 5 is fixed with a toggle tooth 16 near the end of the transmission gear 15. The teeth 16 are engaged with the transmission gear 15. The top outer side of the mounting ring A14 is rotatably connected to the drive gear 17. The top of the drive gear 17 is fixed with an eccentric wheel 18. The drive gear 17 is engaged with the transmission gear 15. The middle part of the outer side of the mounting ring A14 is fixed with a telescopic rod A20. The telescopic end of the telescopic rod A20 is fixed with an oscillation plate 21. Multiple groups of elastic connecting belts 23 are installed on the outer side of the oscillation plate 21. The elastic connecting belts 23 are connected by partitions 22.

[0041] In work, the device is electrically connected with external power supply, and is connected with external control device to control the electrical elements inside the device. The external control device is known to those skilled in the art, and thus is not described in detail.

[0042] When the shaft needs to be dug inside the tunnel, the digging device body 2 is installed above the tunnel top 1, and the position of the digging device body 2 is continuously adjusted to be close to the position where the shaft needs to be dug after measurement. Then the control driving module 3 is installed on the top of the digging device body 2, and the position of the control driving module 3 is finely adjusted so that the output end of the control driving module 3 is opposite to the point where the shaft needs to be dug. At this time, the bottom expander 8 and the sliding ring 10 are retracted, the drill bit 13 slides out from the inside of the driving shaft 4, and the drill bit 13 pulls the sliding ring 10, the connecting sheet 9 and the bottom expander 8 to slide to the bottom. For details, please watch Figure 5 Then the position and height of the drill bit 13 inside the intelligent length adjusting module 5 are adjusted by the function of the intelligent length adjusting module 5 and the external control device. When the height of the intelligent length adjusting module 5 is adjusted, the driving shaft 4 remains stationary. When the adjustment is completed, the control driving module 3 drives the drill bit 13 to start digging the shaft. At the same time, the external mud circulating device is used to discharge the soil in the digging process from the inside of the shaft to reduce the influence of soil accumulation on the progress of the digging.

[0043] When the driving shaft 4 drives the drill bit 13 to drill the hole at the bottom of the tunnel top 1, because the outer side of the protective cylinder A6 is fixedly connected with the support frame 30, when the drill bit 13 excavates the tunnel top 1, the upper half of the protective cylinder A6 remains stationary due to the limiting of the support frame 30, at this time, because the protective cylinder A6 and the protective cylinder B7 are connected by a plurality of transmission gears 15, the protective cylinder B7 remains relatively stationary with the protective cylinder A6, at this time, the driving shaft 4 drives the intelligent length adjusting module 5 to rotate, the driving teeth 16 on the outer side of the intelligent length adjusting module 5 will drive the transmission gears 15 to rotate constantly, the driving teeth 16 drive the driving gears 17 and the eccentric wheel 18 to rotate constantly, at this time, the oscillating plate 21 on one side of the telescopic rod A20 is in contact with the eccentric wheel 18, when the eccentric wheel 18 rotates, it constantly knocks the oscillating plate 21, causing the oscillating plate 21 to constantly knock the inner side wall of the excavated tunnel top 1, the compensation slot 19 is provided to reduce the damage to the protective cylinder B7 caused by the direct impact of the eccentric wheel 18 on the protective cylinder B7 during rotation, the next step is to connect a plurality of elastic connecting belts 23 through the partition plate 22, so that the elastic connecting belts 23 form a circle, the length of the elastic connecting belts 23 can be replaced and modified according to the diameter of the excavated shaft, so that the elastic connecting belts 23 and the partition plate 22 together form a cylinder that can constantly expand outward, then the cylinder formed by the partition plate 22 and the elastic connecting belts 23 is sleeved outside the shock oscillating plate 21, and then the eccentric wheel 18 and the shock oscillating plate 21 are used to constantly tamp and flatten the inner side wall of the excavated tunnel top 1, the shock oscillating plate 21 descends synchronously with the drill bit 13, and the intelligent length adjusting module 5 and the drill bit 13 are used to synchronize the excavation of the shaft and the tamping of the inner side wall, further reducing the possibility of collapse during shaft excavation in soft soil area, improving the safety and reliability during construction,

[0044] Further, referring to Figures 1-12 As shown in the figure, the inner wall supporting mechanism comprises a support module 24, a buckle 25, a cutting knife head 27, a through slot 28, and a limiting column 29, a plurality of support modules 24 are installed inside the tunnel top 1, a cutting knife head 27 is fixedly connected to the bottom of the outer side of the support module 24, a plurality of through slots 28 are formed in the cutting knife head 27, and a limiting column 29 is slidably connected in the through slot 28, and a buckle 25 is fixedly connected to the top of the outer side of the support module 24, which can make the splicing between the plurality of support modules 24 more stable and reliable.

[0045] The recycling guide mechanism includes a guide groove 26 located on the inner side of the support module 24, and the guide groove 26 forms a spiral channel when the support module 24 is spliced.

[0046] The angle adjusting mechanism includes a bevel gear A 34, a universal joint 35, a rotating shaft 36, a hard special-shaped cylinder 37, and an extension rod B 38. The inner side of the fixed frame 33 is rotatably connected with the bevel gear A 34, which is in mesh with the bevel gear 32. The end of the bevel gear A 34 away from the bevel gear 32 is hingedly connected with the universal joint 35. The universal joint 35 rotates inside the fixed frame 33. The end of the universal joint 35 away from the bevel gear A 34 is hingedly connected with the rotating shaft 36. The bottom of the support frame 30 is fixedly connected with the extension rod B 38. The extension end of the extension rod B 38 is fixedly connected with the hard special-shaped cylinder 37. The rotating shaft 36 is rotatably connected inside the hard special-shaped cylinder 37.

[0047] The transmission mechanism includes a bevel gear B 39, a dialing shaft 40, a rotating gear shaft 41, a dialing belt ring 42, and a gear groove 43. The bottom of the outer side of the rotating shaft 36 is fixedly connected with the bevel gear B 39. The rotating gear shaft 41 is rotatably connected inside the hard special-shaped cylinder 37. The dialing shaft 40 is rotatably connected at the bottom of the inner side of the hard special-shaped cylinder 37. The middle of the rotating gear shaft 41 is in mesh with the bevel gear B 39. The outer side of the dialing shaft 40 is provided with a gear groove 43 near the rotating gear shaft 41. The gear groove 43 is in mesh with the rotating gear shaft 41. The outer side of the dialing shaft 40 is rotatably connected with the dialing belt ring 42.

[0048] When working, during the process of excavating the vertical shaft, when excavated to a certain depth, support is needed on the inner side wall of the vertical shaft, so during excavation, the two groups of support frames 30 are spliced and then fixed at the top of the protective cylinder A6, the bevel gear 32 is installed on the outside of the drive shaft 4, so that the drive shaft 4 can also drive the bevel gear 32 to rotate continuously during rotation, then the two groups of support modules 24 are spliced, because the soil in the working area is soft and is immediately compacted after excavation, further expanding the diameter of the vertical shaft, so the inner diameter of the two groups of support modules 24 after splicing can be slightly larger than the diameter of the drill bit 13, so as to facilitate the subsequent removal of the drill bit 13 and placing it into the inner side wall of the tunnel top 1, when the first group of spliced support modules 24 completely enters the inside of the tunnel top 1, the second group of spliced drive shafts 4 are tightly attached to the first group of support modules 24, which are sunk into the inside of the tunnel top 1, before the first group is sunk, the first group of support modules 24 are fixed with cutting knife heads 27 at the bottom, the cutting knife heads 27 have a good cutting effect on the bottom soil, before the support module 24 contacts the tunnel top 1, the cutting knife head 27 performs a preliminary trimming on the inner side wall compacted by the cylinder formed by the partition plate 22 and the elastic connecting belt 23, so that the outer side wall of the support module 24 is more closely and reliably attached to the inner side wall of the tunnel top 1, and the multiple groups of support modules 24 are connected by buckles 25.

[0049] In the process of supporting module 24 descending inside the tunnel top 1, the control telescopic rod B38 begins to extend, driving the hard profiled barrel 37 and the rotating shaft 36 to shift around the universal joint 35, the two sides of the hard profiled barrel 37 are respectively connected with the telescopic rod B38 and the rotating shaft 36, and the rotating shaft 36 is rotatably connected inside the fixed frame 33, which can realize the stability and reliability of the hard profiled barrel 37 when adjusting the angle. By adjusting the length of the telescopic rod B38 to control the angle of the hard profiled barrel 37, it can tightly fit the inner side wall of the supporting module 24. Because the bevel gear 32 rotates with the driving shaft 4, it is driven by the bevel gear A 34 and the universal joint 35, so that the rotating shaft 36 rotates inside the hard profiled barrel 37, and the rotation of the rotating shaft 36 drives the bevel gear B 39 to rotate inside the hard profiled barrel 37, and then the rotating gear shaft 41 begins to rotate. Because the rotating gear shaft 41 and the gear groove 43 are engaged with each other, the rotating gear shaft 41 rotates at the same time, the driving shaft 40 drives the driving belt ring 42 to rotate continuously, the driving belt ring 42 is in close contact with the inner side wall of the supporting module 24, and cooperates with the rotation of the driving shaft 4 to continuously drive the supporting module 24 to move downward. In cooperation with the speed ratio between the bevel gear 32 and the support frame 30, when the drill bit 13 moves downward, the supporting module 24 also moves downward synchronously, so that the supporting module 24 and the drill bit 13 descend synchronously inside the tunnel top 1, reducing the possibility of the supporting module 24 sinking too fast inside the tunnel top 1 and contacting the elastic connecting belt 23, or sinking too slowly and not supporting the excavated area in time, thereby causing accidents.

[0050] When the shaft is excavated, the intelligent length adjusting module 5 controls the drill bit 13 to move upward inside the intelligent length adjusting module 5, pulls the sliding ring 10, and makes the connecting piece 9 begin to rotate around the hinge block 11, slowly opens the bottom expander 8. In this process, the drill bit 13 continues to rotate slowly, and begins to expand the bottom of the shaft. At the same time, the supporting module 24 is continuously slowly lowered by the driving belt ring 42, and when the supporting module 24 descends to near the elastic connecting belt 23, the elastic connecting belt 23 continuously knocks and collides, knocks the cutting tool 27 at the bottom of the supporting module 24, and then the through slot 28 and the limiting column 29 inside the cutting tool 27 are impacted. The limiting column 29 is embedded into the inner side wall of the tunnel top 1 through the cutting tool 27, and the supporting module 24 is limited and temporarily supported, further improving the stability of the inner side wall of the tunnel top 1,

[0051] After the bottom expansion is completed, the control driving module 3 reduces the rotating speed of the drill bit 13, and the telescopic rod B38 begins to recover, so that the supporting module 24 and the driving belt ring 42 are separated from each other, and then the drill bit 13 is reset to Figure 5In the case that the soil is soft, the drill bit 13 is taken out from inside the tunnel top 1, and in the process of taking out, the drill bit 13 is rotated slowly while rising, and in the process of rotating, the outer side of the drill bit 13 is matched with the guide groove 26 inside the supporting module 24, which cleans the surface of the drill bit 13 and reduces the damage of the drill bit 13 to the inside of the supporting module 24, thereby further improving the applicability of the device. When the drill bit 13 is slowly rotating and rising, the oscillating plate 21 continuously knocks the inner side wall of the supporting module 24 which has completed the supporting effect at a low speed, thereby further increasing the tightness and stability between the supporting module 24 and the tunnel top 1.

[0052] By using the drilling and expanding assembly and the synchronous shifting assembly, the excavation and expansion are integrated when excavating the shaft of the tunnel top 1, and the shifting of the supporting module 24 by the shifting belt 42 makes the speed of the supporting module 24 consistent with the excavation of the shaft, thereby further reducing the collapse of the shaft during excavation. Before the supporting of the supporting module 24, the ramming of the elastic connecting belt 23 to the inner side wall of the shaft and the trimming of the cutting head 27 to the inner side wall of the shaft, and then the slight knocking of the elastic connecting belt 23 to the inner side wall of the supporting module 24 after the excavation of the shaft, increase the tightness of the supporting module 24 and the inner side wall of the shaft, making the device more stable and reliable when excavating the shaft in areas with soft soil, reducing the collapse of the shaft wall and the falling of the soil during excavation, and enhancing the practicality and reliability of the device.

[0053] As shown in Figure 2 The shock-absorbing rod 44 is fixedly connected to the outer top of the protective cylinder B7, and the telescopic end of the shock-absorbing rod 44 is fixedly connected to the drill bit 13.

[0054] During work, the shock-absorbing rod 44 is installed between the drill bit 13 and the protective cylinder B7, and the telescopic end of the shock-absorbing rod 44 is fixedly connected to the drill bit 13. When the height of the drill bit 13 is adjusted in the intelligent length adjusting module 5, the shock-absorbing rod 44 moves with the drill bit 13 and supports it. By supporting the drill bit 13 with the shock-absorbing rod 44, the drill bit 13 is more stable and reliable when excavating the shaft.

[0055] As described above, the problem of collapse of the shaft wall and falling of the soil during excavation when drilling in the tunnel is effectively solved, which not only affects the progress of excavation, but also may cause ground subsidence and damage to surrounding buildings in severe cases, causing huge property losses to the surrounding area.

[0056] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; it is not intended to exclude myriad other embodiments of the present application that other inventors can develop based on the same general inventive concepts embodied by the described embodiments. That is, although the present application is described in terms of particular embodiments and illustrative figures, it should be apparent that the scope of the present application is not limited to these specific embodiments.

[0057] While the embodiments of the application have been shown and described herein, it will be understood by those skilled in the art that many changes, modifications, substitutions and alterations to these embodiments can be made without departing from the principles and spirits of the application, and it is intended that the scope of the application be limited solely by the scope of the appended claims and the equivalents thereof.

Claims

1. A tunnel bottom expansion bored pile construction support device, comprising a tunnel top (1) and an excavation device body (2), characterized in that: The excavation device body (2) is located on the top of the tunnel roof (1); a control drive module (3) is fixedly connected to the top of the excavation device body (2); and a drive shaft (4) is fixedly connected to the output end of the control drive module (3); A punching and bottom-enlarging assembly is located at the bottom of the outer side of the drive shaft (4) and inside the tunnel top (1), wherein the punching and bottom-enlarging assembly includes a knocking and leveling mechanism, an inner wall support mechanism, and a recovery guide mechanism, wherein the knocking and leveling mechanism and the inner wall support mechanism cooperate with each other; A synchronous toggle assembly is located on one side of the outside of the drive shaft (4), wherein the synchronous toggle assembly includes an angle adjustment mechanism and a transmission mechanism, and the angle adjustment mechanism and the transmission mechanism are used in conjunction with each other; The drilling and bottom enlarging assembly comprises an intelligent length adjustment module (5), a protective tube A (6), a protective tube B (7), a bottom enlarging tooth (8), a connecting piece (9), a sliding ring (10), a hinge block (11), a through hole (12), and a drill bit (13). The bottom end of the driving shaft (4) is fixedly connected to the intelligent length adjustment module (5). The outer side of the intelligent length adjustment module (5) is rotatably connected to the protective tube A (6). The inner side of the intelligent length adjustment module (5) is slidably connected to the drill bit (13). A protective tube B (7) is rotatably provided on the outer side of the bottom of the length-adjusting module (5), bottom-enlarging teeth (8) are hingedly connected to both sides of the bottom of the protective tube B (7), a connecting piece (9) is hingedly connected to the middle of the outer side of the bottom-enlarging teeth (8), a sliding ring (10) is slidably connected to the outer side of the through hole (12), two groups of hinge blocks (11) are connected to the outer side of the sliding ring (10), one end of the connecting piece (9) away from the bottom-enlarging teeth (8) is hingedly connected to the hinge block (11), and a through hole (12) is provided on the inner side of the drill bit (13); The knocking and leveling mechanism includes a mounting ring A (14), a transmission gear (15), a toggle tooth (16), a driving gear (17), an eccentric wheel (18), a compensation groove (19), a telescopic rod A (20), an oscillation plate (21), a partition (22), and an elastic connecting belt (23). The top of the outer side of the protective tube B (7) is rotatably connected to the mounting ring A (14). The end of the mounting ring A (14) away from the protective tube B (7) rotates at the bottom of the protective tube A (6). The outer side of the intelligent length adjustment module (5) is fixedly connected to the toggle tooth (16) near the transmission gear (15). The toggle gear (16) is meshed with the transmission gear (15), the top of the outer side of the mounting ring A (14) is rotatably connected to the driving gear (17), the top of the driving gear (17) is fixedly connected to the eccentric wheel (18), the driving gear (17) and the transmission gear (15) are meshed with each other, the middle part of the outer side of the mounting ring A (14) is fixedly connected to the telescopic rod A (20), the telescopic end of the telescopic rod A (20) is fixedly connected to the oscillation plate (21), and multiple groups of elastic connecting belts (23) are installed on the outer side of the oscillation plate (21), and the elastic connecting belts (23) are connected by partitions (22); The inner wall support mechanism includes a support module (24), a buckle (25), a cutting head (27), a through slot (28), and a limiting column (29). A plurality of support modules (24) are installed on the inner side of the tunnel top (1). The outer bottom of the support module (24) is fixedly connected to the cutting head (27). The cutting head (27) is provided with a plurality of through slots (28) inside. The through slots (28) are slidably connected to the limiting column (29). The outer top of the support module (24) is fixedly connected to the buckle (25). The buckle (25) can make the splicing between the plurality of support modules (24) more stable and reliable. The recovery guide mechanism comprises a guide groove (26), wherein the guide groove (26) is located on the inner side of the support module (24), and when the support module (24) is spliced, the guide groove (26) forms a spiral channel; The synchronous toggle assembly includes a support frame (30), a square groove (31), a bevel gear ring (32), and a fixing frame (33). Two groups of support frames (30) are fixed to the top of the outer side of the tunnel top (1). The inner side of the support frame (30) is provided with a square groove (31). The fixing frame (33) is fixed to the middle part of the outer side of the support frame (30). The outer side of the drive shaft (4) is fixedly mounted with a bevel gear ring (32) near the square groove (31). The bevel gear ring (32) is mounted on the outer side of the drive shaft (4). When the drive shaft (4) rotates, it drives the bevel gear ring (32) to rotate continuously. The angle adjustment mechanism includes a bevel gear A (34), a universal joint (35), a rotating shaft (36), a hard special-shaped cylinder (37), and a telescopic rod B (38). The middle part of the inner side of the fixed frame (33) is rotatably connected to the bevel gear A (34). The bevel gear A (34) and the bevel gear ring (32) are meshed with each other. The end of the bevel gear A (34) away from the bevel gear ring (32) is hinged to the universal joint (35); the universal joint (35) rotates inside the fixed frame (33). The end of the universal joint (35) away from the bevel gear A (34) is hinged to the rotating shaft (36). The outer bottom of the support frame (30) is fixedly connected to the telescopic rod B (38). The telescopic end of the telescopic rod B (38) is fixedly connected to the hard special-shaped cylinder (37). The rotating shaft (36) is rotatably connected inside the hard special-shaped cylinder (37). The transmission mechanism includes a bevel gear B (39), a toggle shaft (40), a rotating gear shaft (41), a toggle belt ring (42), and a gear groove (43). The outer bottom of the rotating shaft (36) is fixedly connected to the bevel gear B (39). The hard special-shaped cylinder (37) is rotatably connected to the rotating gear shaft (41). The inner bottom of the hard special-shaped cylinder (37) is rotatably connected to the toggle shaft (40). The middle part of the rotating gear shaft (41) is meshed with the bevel gear B (39). The outer side of the toggle shaft (40) is provided with a gear groove (43) near the rotating gear shaft (41). The gear groove (43) is meshed with the rotating gear shaft (41). The outer side of the toggle shaft (40) is rotatably connected to the toggle belt ring (42). The control telescopic rod B (38) drives the hard special-shaped cylinder (37) and the rotating shaft (36) to deviate, so that the toggle belt ring (42) can be close to or away from the inner wall of the support module (24).

2. The tunnel bottom expansion bored pile construction support equipment according to claim 1, characterized in that: A shock-absorbing rod (44) is fixedly connected to the top of the outer side of the protective tube B (7), and the telescopic end of the shock-absorbing rod (44) is fixedly connected to the drill bit (13).

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