A novel type of expansion-shell hollow post-grouting enlarged head anchor bolt and its construction technology

Abstract

This application discloses a novel expansion-shell type hollow post-grouting enlarged head anchor bolt and its construction process, belonging to the technical field of anchor bolts. It includes a rod body, a connecting block installed on the bottom surface of the rod body, a drill bit fixed to the bottom surface of the connecting block, and a rotating sleeve sleeved on the outer periphery of the rod body. The rotating sleeve can drive the connecting block to rotate. An installation groove is formed on the outer periphery of the rotating sleeve, and two installation rings are fitted onto the outer periphery of the rotating sleeve, rotatably connected to the rotating sleeve. Several abutment plates are provided on the outer periphery of the rotating sleeve at intervals along its circumference. Two springs are fixed to the side of the abutment plates near the rotating sleeve, and the ends of the springs away from the abutment plates are fixedly connected to the outer circumferential surface of the installation rings. A pushing element is provided on the rotating sleeve to push the abutment plates away from the rotating sleeve. This application has the effect of reducing the possibility of hole collapse.

Description

Technical Field

[0001] This application relates to the technical field of anchor bolts, and in particular to a novel expansion-shell type hollow post-grouting enlarged head anchor bolt and its construction process. Background Technology

[0002] Anchor bolts are a type of rod system used for reinforcing soil and rock masses. They overcome the disadvantage that the tensile strength of soil and rock masses is far lower than their compressive strength by using the longitudinal tensile force of the anchor bolt.

[0003] The conventional method for anchor bolt support construction is as follows: First, drill a hole at the anchor bolt installation location and put anchoring agent into the hole. Then, put the anchor bolt and anchoring agent into the hole together and rotate the anchor bolt to stir the anchoring agent. After stirring, the anchoring agent solidifies and adheres to the inner wall of the hole and the bolt body. After that, grout is injected into the hole.

[0004] Regarding the aforementioned technologies, when the soil in the reinforcement area is relatively loose, the soil on the inner wall of the borehole is prone to collapse during the drilling process, making the subsequent installation of anchor bolts more difficult and affecting the construction quality and speed. Summary of the Invention

[0005] To address the issue of hole collapse during drilling, this application provides a novel expanding shell type hollow post-grouting enlarged head anchor bolt and its construction process.

[0006] This application provides a novel expansion-shell type hollow post-grouting enlarged head anchor bolt and its construction process, which adopts the following technical solution:

[0007] A novel expansion-shell type hollow post-grouting enlarged head anchor bolt includes a rod body, a connecting block installed on the bottom surface of the rod body, a drill bit fixed to the bottom surface of the connecting block, and a rotating sleeve sleeved on the outer periphery of the rod body. Grouting channels are provided through the rod body, the connecting block, and the drill bit. The rotating sleeve can drive the connecting block to rotate. A nut is installed at the end of the rotating sleeve away from the connecting block, and the nut is threadedly connected to the rotating sleeve. An installation groove is formed on the outer periphery of the rotating sleeve, and two installation rings are fitted onto the outer periphery of the rotating sleeve, rotatably connected to the rotating sleeve. Several abutment plates are provided on the outer periphery of the rotating sleeve at intervals along its circumference. Two springs are fixed to the side of each abutment plate near the rotating sleeve, and the end of each spring away from the abutment plate is fixedly connected to the outer periphery of the installation ring. A pushing member is provided on the rotating sleeve to push the abutment plates in a direction away from the rotating sleeve.

[0008] By adopting the above technical solution, after connecting the rotating sleeve and the connecting block, the nut is inserted into the sleeve of the drilling rig. The drilling rig drives the rotating sleeve to rotate through the nut, which in turn drives the drill bit to rotate, so that the rod gradually drills into the soil layer. During the downward movement of the rod, the abutment plate is pushed away from the rotating sleeve by the pushing component, so that the abutment plate abuts against the inner wall of the borehole. The abutment plate can move towards the rotating sleeve under the elastic force of the spring, so that the abutment plate can move back and forth along the radial direction of the rotating sleeve, so that the abutment plate can press and compact the soil on the inner wall of the borehole, thereby reducing the possibility of borehole collapse.

[0009] Preferably, the pushing member includes a pushing ring sleeved and fixed to the outer peripheral surface of the rotating sleeve, the outer peripheral surface of the pushing ring is fixed with a plurality of flanges one, and the side of the abutting plate near the rotating sleeve is fixed with flanges two that can abut against the flanges one.

[0010] By adopting the above technical solution, the rotating sleeve drives the push ring to rotate, and the push ring drives flange one to rotate. When flange one and flange two abut against each other, the abutment plate can be pushed to move towards the inner wall of the borehole. After flange one and flange two separate, flange two moves away from the inner wall of the borehole under the elastic force of spring one, so that flange two is inserted between two adjacent flanges one.

[0011] Preferably, two synchronizing blocks are fixed to the bottom surface of the rotating sleeve. The outer wall of the synchronizing block is provided with a synchronizing groove. A positioning block is slidably installed on the synchronizing block along its own length direction through the synchronizing groove. A second spring is fixed to the side of the positioning block. The end of the second spring away from the positioning block is fixedly connected to the inner wall of the synchronizing groove. A rotating groove for inserting the synchronizing block is provided on the side of the connecting block near the rod body. A positioning groove for inserting the positioning block is provided on the inner wall of the rotating groove.

[0012] By adopting the above technical solution, the rotating sleeve is fitted onto the outer circumference of the rod body, and the synchronizing block is inserted into the rotating groove. The positioning block is inserted into the positioning groove under the elastic force of the second spring, thereby connecting the rotating sleeve with the connecting block. The rotating sleeve can drive the connecting block to rotate synchronously, and thus drive the drill bit to rotate synchronously.

[0013] Preferably, the bottom surface of the synchronizing block has an abutment groove communicating with the positioning groove. The synchronizing block slides vertically along the abutment groove to install the abutment block. The bottom surface of the positioning block has an abutment through groove for inserting the abutment block. The side of the abutment through groove near the second spring has an inclined surface. The top surface of the abutment block has an inclined surface two that can abut against the inclined surface one. A slider is fixed to the inner wall of the abutment groove. A sliding groove is opened on the side of the abutment block. A third spring is fixed to the bottom surface of the slider. The bottom end of the third spring is fixedly connected to the bottom surface of the sliding groove.

[0014] By adopting the above technical solution, the abutting block can move away from the positioning block under the elastic force of spring three. The abutting block moves upward and abuts with inclined surface one and inclined surface two, thereby pushing the positioning block to move closer to spring two, so that the positioning block is disengaged from the positioning groove, thus facilitating the disassembly of the rotating sleeve.

[0015] Preferably, a pressure plate is fixed to one end of the rod near the connecting block, and a slot for inserting the rod is provided on the side of the connecting block near the rod. A pressure groove communicating with the slot is provided inside the connecting block. The pressure plate is slidably connected to the connecting block vertically through the pressure groove, and the pressure plate can abut against the abutting block. A spring is fixed to the bottom surface of the pressure plate, and the bottom end of the spring is fixedly connected to the bottom surface of the pressure groove. A limit plate is fixedly fitted around the outer periphery of the rotating sleeve. The bottom surface of the nut can abut against the top surface of the limit plate. A fixing cap is fixed to the top surface of the nut, and the bottom surface of the fixing cap can abut against the top end of the rod.

[0016] By adopting the above technical solution, the nut and the rotating sleeve are threaded together, the bottom end of the nut is tightly abutted against the top surface of the limiting plate, and the fixing cap is tightly abutted against the top end of the rod, thereby reducing the possibility of the pressure plate moving upward and making the connection between the rotating sleeve and the connecting block more stable; after the nut is removed, the pressure plate moves upward under the elastic force of the spring four, and the pressure plate pushes the abutting block to move upward, thereby facilitating the disassembly of the rotating sleeve.

[0017] Preferably, the outer peripheral surface of the connecting block has two support grooves that communicate with the pressing groove. The connecting block is slidably mounted with an inclined support rod through the support groove, and the top surface of the support rod is inclined away from the pressing plate. The top surface of the pressing plate has a moving groove, and the bottom end of the support rod is mounted with a moving block. The moving block is slidably connected to the pressing plate along the radial direction of the pressing plate through the moving groove. Springs are fixed to the two moving blocks on their opposite sides, and the end of the springs away from the moving blocks is fixedly connected to the inner wall of the moving groove.

[0018] By adopting the above technical solution, during the upward movement of the pressure plate, the two moving blocks move in opposite directions under the elastic force of spring five, thereby pushing the support rod to move upward along the length of the support groove, so that the support rod is inserted into the inner wall of the borehole, thereby improving the anchoring ability of the rod.

[0019] Preferably, a pull rope 1 is threaded through the abutment plate, and two pull ropes 2 are fixed on the pull rope 1. The other end of the pull rope 2 is fixedly connected to the outer circumferential surface of the mounting ring. A control plate is fitted on the outer circumferential surface of the rotating sleeve. The control plate is rotatably connected to the rotating sleeve. A control groove is provided in the control plate. A control block is installed on the control plate by sliding along its own radial direction through the control groove. A through hole 1 is provided in the control plate. A through hole 2 communicating with the through hole 1 is opened on the bottom surface of the control plate. A through hole 3 communicating with the through hole 1 is opened on the bottom surface of the control block. The end of the pull rope 1 away from the mounting ring passes through the through hole 2, through hole 1 and through hole 3 in sequence, and is fixedly connected to the side of the control block away from the rotating sleeve.

[0020] By adopting the above technical solution, the control block is moved toward the direction of the rotating sleeve. The control block drives the abutment plate to move toward the direction of the rotating sleeve through the pull rope one and pull rope two, so that there is a gap between the outer wall of the abutment plate and the inner wall of the borehole, so as to facilitate the removal of the rotating sleeve from the borehole.

[0021] Preferably, a spring six is ​​fixed to the side of the control block away from the rotating sleeve, and one end of the spring six away from the control block is fixedly connected to the inner wall of the control groove; a reset groove is provided on the bottom surface of the limiting plate, and a magnetic block that can be inserted into the control groove is installed on the limiting plate through the reset groove along the vertical direction, and the magnetic block can attract the control block.

[0022] By adopting the above technical solution, the control block can move away from the rotating sleeve under the elastic force of spring six. At this time, the pull rope one is in a slack state, and the abutment plate can abut against the inner wall of the borehole. When the magnetic block is inserted into the control slot, the magnetic force of the magnetic block on the control block is greater than the elastic force of spring six on the control block. The control block moves towards the rotating sleeve, so that the pull rope one is taut, and there is a gap between the abutment plate and the inner wall of the borehole.

[0023] Preferably, the top surface of the limiting plate has a limiting groove, and the limiting plate slides vertically along the limiting groove to install a limiting block. A spring seven is fixed to the bottom surface of the limiting block, and the bottom end of the spring seven is fixedly connected to the bottom surface of the limiting groove. A gear is rotatably installed inside the limiting plate, and racks are fixed to the inner sides of the magnetic block and the limiting block, with the inner sides of the two racks meshing with the gear.

[0024] By adopting the above technical solution, when the nut is sleeved on the rotating sleeve and rotated to move downward, the nut can push the limiting block to move downward. The limiting block drives the magnetic block to move upward through the rack and gear, thereby causing the magnetic block to disengage from the control groove. Under the action of spring six, the control block moves away from the rotating sleeve. The pull rope one loosens, allowing the abutment plate to reciprocate along the radial direction of the rotating sleeve.

[0025] Secondly, the construction method for a frame beam shaping device provided in this application adopts the following technical solution:

[0026] The construction method for the frame beam shaping device includes the following steps:

[0027] S1. Connect the nut to the rotating sleeve with a thread, then put the rotating sleeve on the outer circumference of the rod body, and connect the rotating sleeve and the connecting block;

[0028] S2. Connect the drill rig to the nut thread, rotate the sleeve to drive the drill bit into the soil layer, and rotate the abutment plate on the outer periphery of the sleeve to squeeze the soil on the inner wall of the borehole.

[0029] S3. After the front end of the rod enters the soil layer, the drill bit stops drilling, the drill is separated from the nut, and the nut is separated from the rotating sleeve.

[0030] S4. Rotate the control plate to insert the magnetic block into the control slot. The control block and the magnetic block attract each other. The control block pushes the abutment plate to abut against the rotating sleeve through pull rope one and pull rope two.

[0031] S5. Fix the rotating sleeve and pull the rod outward so that the support rod is inserted into the inner wall of the borehole and the synchronizing block is disengaged from the rotating groove, and pull the rotating sleeve outward.

[0032] S6. Connect the grouting machine and grout the rod and borehole.

[0033] By adopting the above technical solution, the anchoring capacity of the rod can be improved by using the support rod, and during the drilling process, the soil on the inner wall of the borehole can be compacted by using the abutment plate, which can reduce the possibility of borehole collapse.

[0034] In summary, this application includes at least one of the following beneficial technical effects:

[0035] 1. After connecting the rotating sleeve to the connecting block, insert the nut into the sleeve of the drilling rig. The drilling rig drives the rotating sleeve to rotate through the nut, which in turn drives the drill bit to rotate, so that the rod gradually drills into the soil layer. During the downward movement of the rod, the pusher pushes the abutment plate to move away from the rotating sleeve, so that the abutment plate abuts against the inner wall of the borehole. The abutment plate can move towards the rotating sleeve under the elastic force of the spring, so that the abutment plate can move back and forth along the radial direction of the rotating sleeve, so that the abutment plate can press and compact the soil on the inner wall of the borehole, thereby reducing the possibility of borehole collapse.

[0036] 2. Rotating the sleeve drives the push ring to rotate, and the push ring drives flange one to rotate. When flange one and flange two abut against each other, the abutment plate can be pushed to move towards the inner wall of the borehole. After flange one and flange two separate, flange two moves away from the inner wall of the borehole under the elastic force of spring one, so that flange two is inserted between two adjacent flanges one.

[0037] 3. Connect the nut to the rotating sleeve with threads. The bottom end of the nut should be in close contact with the top surface of the limiting plate, and the fixing cap should be in close contact with the top end of the rod. This reduces the possibility of the pressure plate moving upward, making the connection between the rotating sleeve and the connecting block more stable. After the nut is removed, the pressure plate moves upward under the elastic force of the spring four. The pressure plate pushes the abutment block upward, which makes it easier to disassemble the rotating sleeve. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the overall structure of the novel expansion-shell hollow post-grouting enlarged head anchor bolt according to an embodiment of this application.

[0039] Figure 2 This is a cross-sectional view of the rotating sleeve, rod body, and connecting block of the novel expansion-shell hollow post-grouting enlarged head anchor rod according to an embodiment of this application.

[0040] Figure 3 This is a cross-sectional view of the synchronization block of the novel expansion-shell hollow post-grouting enlarged head anchor bolt according to an embodiment of this application.

[0041] Figure 4 This is a cross-sectional view of the limiting plate, control plate, and abutment plate of the novel expansion-shell hollow post-grouting enlarged head anchor bolt according to an embodiment of this application.

[0042] Figure 5 This application Figure 4 Enlarged diagram of point A in the middle.

[0043] Reference numerals: 1. Rod body; 11. Connecting block; 12. Drill bit; 13. Rotating groove; 14. Positioning groove; 15. Slot; 16. Pressing groove; 17. Connecting through groove; 18. Grouting channel; 2. Rotating sleeve; 21. Mounting groove; 22. Mounting ring; 23. Pushing ring; 24. Flange one; 25. Telescopic rod; 26. Mounting through hole; 3. Abutment plate; 31. Spring one; 32. Flange two; 33. Pull rope one; 34. Pull rope two; 35. Through hole one; 36. Through hole two; 37. Through hole three; 4. Synchronizing block; 41. Synchronizing groove; 42. Positioning block; 421. Abutment through groove; 4 22. Inclined Plane 1; 43. Spring 2; 44. Abutting Block; 441. Inclined Plane 2; 45. Abutting Groove; 46. Sliding Block; 47. Sliding Groove; 48. Spring 3; 5. Pressing Plate; 51. Spring 4; 52. Support Groove; 53. Support Rod; 54. Moving Groove; 55. Moving Block; 56. Spring 5; 6. Limiting Plate; 61. Limiting Block; 62. Limiting Groove; 63. Spring 7; 64. Reset Groove; 65. Gear; 66. Rack; 67. Nut; 68. Fixing Cap; 7. Control Plate; 71. Control Block; 72. Spring 6; 73. Magnetic Block; 74. Spring 8; 75. Control Groove. Detailed Implementation

[0044] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0045] This application discloses a novel expansion-shell type hollow post-grouting enlarged head anchor bolt and its construction process. (Refer to...) Figure 1 and Figure 2 The novel expanding shell type hollow post-grouting enlarged head anchor rod and its construction process include a rod body 1, with a connecting block 11 installed at one end of the rod body 1, and a drill bit 12 fixed to the side of the connecting block 11 away from the rod body 1. The rod body 1, connecting block 11, and drill bit 12 are all coaxially arranged, and grouting channels 18 are provided through the rod body 1, connecting block 11, and drill bit 12. A pressure plate 5 is fixed to the end of the rod body 1 near the connecting block 11, and the top surface of the pressure plate 5 is provided through the grouting channel 18. A slot 15 for inserting the rod body 1 is opened on the side of the connecting block 11 near the rod body 1, and a pressure groove 16 communicating with the slot 15 is provided in the connecting block 11. The pressure plate 5 is slidably connected to the connecting block 11 vertically through the pressure groove 16. A spring 4 51 is fixed to the bottom surface of the pressure plate 5, and the bottom end of the spring 4 51 is fixedly connected to the bottom surface of the pressure groove 16.

[0046] Reference Figure 2Two support grooves 52, communicating with the pressing groove 16, are formed on the outer peripheral surface of the connecting block 11. An inclined support rod 53 is slidably mounted on the connecting block 11 through the support grooves 52, with the top surface of the support rod 53 inclined away from the pressing plate 5. A moving groove 54 is formed on the top surface of the pressing plate 5, and a moving block 55 is fixed to the bottom end of the support rod 53. The moving block 55 is slidably connected to the pressing plate 5 along the radial direction of the pressing plate 5 through the moving groove 54. Springs 56 are fixed to the sides of the two moving blocks 55 that are far apart from each other, and the end of the spring 56 away from the moving block 55 is fixedly connected to the inner wall of the moving groove 54.

[0047] When the pressure plate 5 moves upward relative to the connecting block 11 under the elastic force of the spring 4 51, the two moving blocks 55 move in opposite directions under the elastic force of the spring 56, thereby pushing the support rod 53 to move upward along the length of the support groove 52, so that the support rod 53 is inserted into the inner wall of the drill hole, thereby improving the anchoring ability of the rod 1.

[0048] Reference Figure 1 and Figure 2 A rotating sleeve 2 is fitted around the outer periphery of the rod body 1. A nut 67 is fitted onto the end of the rotating sleeve 2 away from the connecting block 11. The nut 67 is threadedly connected to the rotating sleeve 2, and its outer periphery has external threads for mating with the drilling rig. A fixing cap 68 is fixed to the end of the nut 67 away from the connecting block 11, and the bottom surface of the fixing cap 68 abuts against the top surface of the rod body 1. A limiting plate 6 is fixedly fitted around the outer periphery of the rotating sleeve 2, and the bottom surface of the nut 67 abuts against the top surface of the limiting plate 6.

[0049] Reference Figure 2 and Figure 3 Two synchronizing blocks 4 are fixed to the bottom surface of the rotating sleeve 2. A synchronizing groove 41 is formed on the outer wall of each synchronizing block 4. A positioning block 42 is slidably mounted on each synchronizing block 4 along its length via the synchronizing groove 41. A rotating groove 13 for inserting the synchronizing block 4 is formed on the side of the connecting block 11 near the rod 1. A positioning groove 14 for inserting the positioning block 42 is formed on the inner wall of the rotating groove 13. A second spring 43 is fixed to the side of each positioning block 42 that is close to each other. The end of the second spring 43 away from the positioning block 42 is fixedly connected to the inner wall of the synchronizing groove 41.

[0050] Reference Figure 2 and Figure 3The bottom surface of the synchronizing block 4 has an abutment groove 45 that communicates with the positioning groove 14. The synchronizing block 4 has an abutment block 44 that slides vertically along the abutment groove 45. The bottom surface of the synchronizing groove 41 has a connecting groove 17 that communicates with the pressing groove 16. The abutment block 44 can be inserted into the connecting groove 17. A slider 46 is fixed to the inner wall of the abutment groove 45. A sliding groove 47 is provided on the side of the abutment block 44. The abutment block 44 slides vertically with the synchronizing block 4 through the cooperation of the slider 46 and the sliding groove 47. A spring 48 is fixed to the bottom surface of the slider 46. The bottom end of the spring 48 is fixedly connected to the bottom surface of the sliding groove 47. The bottom surface of the positioning block 42 is provided with an abutment groove 421 for inserting the abutment block 44. The side of the abutment groove 421 near the second spring 43 is provided with a first inclined surface 422. The top surface of the abutment block 44 is provided with a second inclined surface 441 that can abut against the first inclined surface 422.

[0051] The rotating sleeve 2 is fitted onto the outer circumference of the rod body 1, the synchronizing block 4 is inserted into the rotating groove 13, the positioning block 42 is inserted into the positioning groove 14 under the elastic force of the spring 43, the abutting block 44 is inserted into the connecting groove 17, and the connecting block 11 can rotate synchronously with the rotating sleeve 2; the rod body 1 is tightly abutted against the fixing cap 68, the spring 51 is in a compressed state, and the support rod 53 is located in the support groove 52; the rotating sleeve 2 is connected to the drilling machine through the nut 67, the drilling machine drives the rotating sleeve 2 to rotate, the rotating sleeve 2 drives the connecting block 11 to rotate, and then drives the drill bit 12 to rotate synchronously, so that the rod body 1 gradually drills into the soil layer.

[0052] Reference Figure 4 The rotating sleeve 2 has an installation groove 21 on its outer periphery, and two installation rings 22 are fitted around its outer periphery. The installation rings 22 are rotatably connected to the rotating sleeve 2 through the installation groove 21. Several abutment plates 3 are evenly spaced along their circumference on the outer periphery of the rotating sleeve 2. The abutment plates 3 are arc-shaped, and both sides of the abutment plates 3 are bent towards the side closer to the rotating sleeve 2. Two telescopic rods 25 are fixed to the side of the abutment plates 3 near the rotating sleeve 2. The outer periphery of the installation rings 22 has installation through holes 26 for inserting the telescopic rods 25. The telescopic rods 25 slide along the radial direction of the installation rings 22 through the installation through holes 26. A spring 31 is fitted around the outer periphery of the telescopic rods 25. One end of the spring 31 is fixedly connected to the side of the abutment plate 3 near the installation ring 22, and the end of the spring 31 away from the abutment plate 3 is fixedly connected to the outer periphery of the installation ring 22. A push ring 23 is fixedly fitted onto the outer circumferential surface of the rotating sleeve 2, and the push ring 23 is located between two mounting rings 22. Several flanges 24 are fixedly arranged on the outer circumferential surface of the push ring 23, with the flanges 24 evenly spaced along the axial direction of the push ring 23. A flange 32, which abuts against the flanges 24, is fixed to the side of the abutting plate 3 near the rotating sleeve 2, and the flange 32 can be inserted between two adjacent flanges 24.

[0053] Reference Figure 4 and Figure 5 A control plate 7 is fitted onto the outer circumference of the rotating sleeve 2, and the control plate 7 is rotatably connected to the rotating sleeve 2. The control plate 7 has four control slots 75, through which control blocks 71 are slidably mounted radially. The control blocks 71 are evenly spaced along the axial direction of the control plate 7. A pull rope 33 is fixed to the side of the control block 71 away from the rotating sleeve 2. The pull rope 33 corresponds to abutment plates 3, and one end of the pull rope 33 away from the control block 71 is connected to the corresponding abutment plate 3. Two pull ropes 34 are fixed to the pull rope 33, and the other end of the pull rope 34 passes through the telescopic rod 25 and is fixedly connected to the inner wall of the mounting through hole 26. The control plate 7 has a horizontally arranged through hole 35, and the bottom surface of the control plate 7 has a through hole 36 communicating with the through hole 35. The bottom surface of the control block 71 has a through hole 37 communicating with the through hole 35. The end of the pull rope 33 away from the abutment plate 3 passes through the through hole 36, through hole 35 and through hole 37 in sequence, and is fixedly connected to the control block 71.

[0054] Reference Figure 4 and Figure 5 A spring 72 is fixed to the side of the control block 71 away from the rotating sleeve 2. The end of the spring 72 away from the control block 71 is fixedly connected to the inner wall of the control groove 75. A reset groove 64 is provided on the bottom surface of the limiting plate 6. A magnetic block 73, which can be inserted into the control groove 75, is installed on the limiting plate 6 through the reset groove 64 and can attract the control block 71. A spring 74 is fixed to the top surface of the magnetic block 73 and the top end of the spring 74 is fixedly connected to the inner wall of the reset groove 64. A limiting groove 62 is provided on the top surface of the limiting plate 6. A limiting block 61 is installed on the limiting plate 6 through the limiting groove 62 and the bottom surface of the limiting block 61 is fixedly connected to the bottom surface of the limiting groove 62. A gear 65 is rotatably mounted inside the limiting plate 6. A rack 66 is fixed on the inner side of both the magnetic block 73 and the limiting block 61. The inner sides of the two racks 66 mesh with the gear 65.

[0055] When nut 67 is fitted onto rotating sleeve 2 and rotated, nut 67 pushes limiting block 61 downward, causing the bottom surface of nut 67 to abut tightly against the top surface of limiting plate 6. Limiting block 61 drives magnetic block 73 upward via rack 66 and gear 65, causing magnetic block 73 to disengage from control groove 75. Control block 71 moves away from rotating sleeve 2 under the action of spring 62, and pull rope 33 is in a slack state, allowing abutment plate 3 to reciprocate radially along rotating sleeve 2. During the disassembly of nut 67, rotating control block 71... The plate 7 is made so that the reset groove 64 is aligned with the control groove 75. Then the limit block 61 moves upward under the elastic force of the spring 73, and the magnetic block 73 moves downward under the elastic force of the spring 84. The magnetic block 73 is inserted into the corresponding control groove 75. The control block 71 moves towards the magnetic block 73 under the elastic force of the magnetic block 73. The control block 71 drives the abutment plate 3 to move towards the rotating sleeve 2 through the pull rope 1 33 and pull rope 2 34, so that there is a gap between the abutment plate 3 and the inner wall of the borehole, so as to facilitate the disassembly of the rotating sleeve 2.

[0056] The implementation principle of a novel expansion-shell type hollow post-grouting enlarged head anchor bolt according to an embodiment of this application is as follows: After the rotating sleeve 2 and the connecting block 11 are installed, they are connected to the drilling machine using the nut 67. As the drill bit 12 penetrates into the soil layer, the rotating sleeve 2 drives the pushing ring 23 to rotate. The pushing ring 23 abuts against the flange 24 and the flange 32, thereby pushing the abutting plate 3 to move towards the inner wall of the borehole. The abutting plate 3 compacts the soil on the inner wall of the borehole. When the flange 24 and the flange 32 separate, the abutting plate 3 moves away from the inner wall of the borehole under the elastic force of the spring 31, so that the abutting plate 3 moves back and forth radially along the rotating sleeve 2, thereby reducing the possibility of borehole collapse.

[0057] After the front end of rod 1 enters the soil layer, the drill is separated from the nut 67 and the nut 67 is removed by rotation. Rod 1 moves upward under the elastic force of spring 4 51, and support rod 53 moves upward under the elastic force of spring 56 and is inserted into the inner wall of the borehole, thereby improving the anchoring capacity of rod 1. The pressure plate 5 moves upward under the elastic force of spring 4 51, and the pressure plate 5 pushes the abutment block 44 to move upward. The abutment block 44 abuts against the inclined surface 1 422 and the inclined surface 2 441, thereby pushing the positioning block 42 to disengage from the positioning groove 14, so as to facilitate the removal of the rotating sleeve 2.

[0058] A novel construction process for expansion-shell type hollow post-grouting enlarged head anchor bolts includes the following steps:

[0059] S1. Thread the nut 67 to the rotating sleeve 2, then put the rotating sleeve 2 on the outer circumference of the rod body 1, and connect the rotating sleeve 2 to the connecting block 11 so that the connecting block 11 can rotate synchronously with the rotating sleeve 2.

[0060] S2. Connect the drill to the nut 67, rotate the sleeve 2 to drive the drill bit 12 into the soil layer. During the drilling process, rotate the abutment plate 3 on the outer periphery of the sleeve 2 to squeeze the soil on the inner wall of the borehole.

[0061] S3. After the front end of the rod 1 enters the soil layer, the drill bit 12 stops drilling, the drill is separated from the nut 67, and then the nut 67 is separated from the rotating sleeve 2. The rod 1 moves upward under the elastic force of the spring 4 51, and the support rod 53 is inserted into the inner wall of the borehole under the elastic force of the spring 56.

[0062] S4. Rotate the control plate 7 so that the magnetic block 73 is inserted into the control slot 75. The control block 71 and the magnetic block 73 are attracted together. The control block 71 pushes the abutment plate 3 to abut against the rotating sleeve 2 through the pull rope 1 33 and pull rope 2 34.

[0063] S5. Fix the rotating sleeve 2 and pull the rod 1 outward so that the support rod 53 is inserted into the inner wall of the borehole and the synchronizing block 4 is disengaged from the rotating groove 13, and the rotating sleeve 2 is pulled outward.

[0064] S6. Install the grouting machine and grout the rod body 1 and the drilled hole.

[0065] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A novel type of expansion-shell hollow post-grouting enlarged head anchor bolt, characterized in that: The device includes a rod body (1), a connecting block (11) mounted on the bottom surface of the rod body (1), a drill bit (12) fixed to the bottom surface of the connecting block (11), and a rotating sleeve (2) sleeved on the outer periphery of the rod body (1). Grouting channels (18) are provided through the rod body (1), the connecting block (11), and the drill bit (12). The rotating sleeve (2) drives the connecting block (11) to rotate. A nut (67) is installed at the end of the rotating sleeve (2) away from the connecting block (11), and the nut (67) is threadedly connected to the rotating sleeve (2). An installation groove is provided on the outer periphery of the rotating sleeve (2). 21) Two mounting rings (22) are fitted around the outer periphery of the rotating sleeve (2). The mounting rings (22) are rotatably connected to the rotating sleeve (2). A plurality of abutment plates (3) are provided around the outer periphery of the rotating sleeve (2) at intervals along its own circumference. Two springs (31) are fixed to the side of the abutment plate (3) near the rotating sleeve (2). The end of the spring (31) away from the abutment plate (3) is fixedly connected to the outer periphery of the mounting ring (22). The rotating sleeve (2) is provided with a pusher for pushing the abutment plate (3) to move away from the rotating sleeve (2). The pushing component includes a pushing ring (23) sleeved and fixed to the outer circumferential surface of the rotating sleeve (2). Several flanges (24) are fixed to the outer circumferential surface of the pushing ring (23). A flange (32) is fixed to the side of the abutting plate (3) near the rotating sleeve (2) and abuts against the flanges (24). A pull rope (33) is threaded through the abutting plate (3). Two pull ropes (34) are fixed to the pull rope (33), and the other end of each pull rope (34) is fixedly connected to the outer circumferential surface of the mounting ring (22). A control plate (7) is sleeved on the outer circumferential surface of the rotating sleeve (2). The control plate (7) is rotatably connected to the rotating sleeve (2). The control plate (7) is provided with a control groove (75). The control plate (7) slides radially along its own axis through the control groove (75) to install a control block (71). The control plate (7) is provided with a through hole one (35). The bottom surface of the control plate (7) is provided with a through hole two (36) that communicates with the through hole one (35). The bottom surface of the control block (71) is provided with a through hole three (37) that communicates with the through hole one (35). The end of the pull rope one (33) away from the mounting ring (22) passes through the through hole two (36), the through hole one (35), and the through hole three (37) in sequence, and is fixedly connected to the side of the control block (71) away from the rotating sleeve (2).

2. The novel expansion-shell type hollow post-grouting enlarged head anchor bolt according to claim 1, characterized in that: Two synchronizing blocks (4) are fixed on the bottom surface of the rotating sleeve (2). The outer wall of the synchronizing block (4) is provided with a synchronizing groove (41). The synchronizing block (4) slides along its own length direction through the synchronizing groove (41) to install a positioning block (42). A second spring (43) is fixed on the side of the positioning block (42). The end of the second spring (43) away from the positioning block (42) is fixedly connected to the inner wall of the synchronizing groove (41). The side of the connecting block (11) near the rod (1) is provided with a rotating groove (13) for inserting the synchronizing block (4). The inner wall of the rotating groove (13) is provided with a positioning groove (14) for inserting the positioning block (42).

3. A novel expansion-shell type hollow post-grouting enlarged head anchor bolt according to claim 2, characterized in that: The bottom surface of the synchronization block (4) is provided with an abutment groove (45) that communicates with the positioning groove (14). The synchronization block (4) slides vertically along the abutment block (44) through the abutment groove (45). The bottom surface of the positioning block (42) is provided with an abutment through groove (421) for inserting the abutment block (44). The abutment through groove (421) is provided with a slope (422) on the side near the second spring (43). The top surface of the abutment block (44) is provided with a slope (441) that abuts against the slope (422). The inner wall of the abutment groove (45) is fixed with a slider (46). The side of the abutment block (44) is provided with a sliding groove (47). The bottom surface of the slider (46) is fixed with a spring (48). The bottom end of the spring (48) is fixedly connected to the bottom surface of the sliding groove (47).

4. A novel expansion-shell type hollow post-grouting enlarged head anchor bolt according to claim 3, characterized in that: A pressure plate (5) is fixed to one end of the rod (1) near the connecting block (11). A slot (15) for inserting the rod (1) is provided on the side of the connecting block (1) near the rod (1). A pressure groove (16) communicating with the slot (15) is provided in the connecting block (11). The pressure plate (5) is slidably connected to the connecting block (11) vertically through the pressure groove (16). The pressure plate (5) and the abutting block are connected. (44) Abutting; the bottom surface of the pressure plate (5) is fixed with a spring four (51), the bottom end of the spring four (51) is fixedly connected to the bottom surface of the pressure groove (16), the outer periphery of the rotating sleeve (2) is fitted with a limiting plate (6), the bottom surface of the nut (67) abuts against the top surface of the limiting plate (6), the top surface of the nut (67) is fixed with a fixing cap (68), and the bottom surface of the fixing cap (68) abuts against the top end of the rod (1).

5. A novel expansion-shell type hollow post-grouting enlarged head anchor bolt according to claim 4, characterized in that: Two support grooves (52) communicating with the pressing groove (16) are opened on the outer peripheral surface of the connecting block (11). The connecting block (11) is slidably mounted with an inclined support rod (53) through the support groove (52). The top surface of the support rod (53) is inclined away from the pressing plate (5). The top surface of the pressing plate (5) is provided with a moving groove (54). A moving block (55) is installed at the bottom end of the support rod (53). The moving block (55) is slidably connected to the pressing plate (5) along the radial direction of the pressing plate (5) through the moving groove (54). Spring five (56) is fixed on the side of the two moving blocks (55) that are far away from each other. The end of the spring five (56) that is far away from the moving block (55) is fixedly connected to the inner wall of the moving groove (54).

6. A novel expansion-shell type hollow post-grouting enlarged head anchor bolt according to claim 5, characterized in that: A spring six (72) is fixed to the side of the control block (71) away from the rotating sleeve (2). One end of the spring six (72) away from the control block (71) is fixedly connected to the inner wall of the control groove (75). A reset groove (64) is provided on the bottom surface of the limiting plate (6). A magnetic block (73) inserted in the control groove (75) is installed on the limiting plate (6) through the reset groove (64) in a vertical direction. The magnetic block (73) attracts the control block (71).

7. A novel expansion-shell type hollow post-grouting enlarged head anchor bolt according to claim 6, characterized in that: The top surface of the limiting plate (6) has a limiting groove (62). The limiting plate (6) slides vertically through the limiting groove (62) to install a limiting block (61). A spring seven (63) is fixed on the bottom surface of the limiting block (61). The bottom end of the spring seven (63) is fixedly connected to the bottom surface of the limiting groove (62). A gear (65) is rotatably installed inside the limiting plate (6). A rack (66) is fixed on the inner side of the magnetic block (73) and the limiting block (61). The inner sides of the two racks (66) mesh with the gear (65).

8. The construction process of a novel expansion-shell type hollow post-grouting enlarged head anchor bolt according to any one of claims 6-7, characterized in that: Includes the following steps: S1. Connect the nut (67) to the rotating sleeve (2) by thread, then put the rotating sleeve (2) on the outer circumference of the rod (1), and connect the rotating sleeve (2) to the connecting block (11). S2. Connect the drill rig to the nut (67) by thread, rotate the sleeve (2) to drive the drill bit (12) into the soil layer, and rotate the abutment plate (3) on the outer periphery of the sleeve (2) to squeeze the soil on the inner wall of the borehole. S3. After the front end of the rod (1) enters the soil layer, the drill bit (12) stops drilling, and the drill is separated from the nut (67). The nut (67) is separated from the rotating sleeve (2). S4. Rotate the control plate (7) so that the magnetic block (73) is inserted into the control slot (75). The control block (71) and the magnetic block (73) are attracted to each other. The control block (71) pushes the abutment plate (3) to abut against the rotating sleeve (2) through the pull rope one (33) and pull rope two (34). S5. Fix the rotating sleeve (2) and pull the rod (1) outward so that the support rod (53) is inserted into the inner wall of the borehole and the synchronizing block (4) is disengaged from the rotating groove (13). Pull the rotating sleeve (2) outward. S6. Connect the grouting machine and grout the rod (1) and the borehole.

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