A method for soft rock tunnel face anchor rod construction

Abstract

The application discloses a kind of soft rock tunnel face anchor rod construction methods, construction method includes: the tail of glass steel anchor rod is fixed on sliding push mechanism, and make the tail of glass steel anchor rod same extrusion propulsion mechanism connection;Anchoring agent is filled into extrusion propulsion mechanism, control sliding push mechanism work, so that sliding push mechanism can push the head of glass steel anchor rod and insert into borehole;Drive extrusion propulsion mechanism work, so that extrusion propulsion mechanism will anchor agent be injected into borehole by hollow glass steel anchor rod;Sliding push mechanism drives glass steel anchor rod to rotate by rotating drive assembly;Make sliding push mechanism and the tail of glass steel anchor rod are disconnected, and extrusion propulsion mechanism and the tail of glass steel anchor rod are also disconnected, and support frame is transferred to next borehole position.The advantages of the present application are: glass steel anchor rod can be anchored and installed in the borehole of face, and the anchoring and installation effect of glass steel anchor rod is improved.

Description

Technical Field

[0001] This invention relates to the technical field of anchor bolt construction, and in particular to a method for anchor bolt construction at the face of a soft rock tunnel. Background Technology

[0002] my country's transportation infrastructure network, including highways and railways, is gradually expanding from the plains and hilly areas of the central and eastern regions to the rugged mountainous areas of the west. Since the western region is predominantly mountainous, a large number of tunnel projects are needed, inevitably encountering soft rock strata. During construction, soft rock tunnels often experience large deformations of the surrounding rock, leading to collapse and instability, seriously endangering personnel and equipment safety and posing a significant challenge to safe and efficient construction. The occurrence of large deformation disasters in weak tunnel surrounding rock reflects the weak spatial constraint effect at the tunnel face. Installing fiberglass anchors in the rock mass at the tunnel face, which are lightweight, high-strength, have low shear strength, and do not interfere with excavation, is an effective means to enhance the spatial constraint effect at the tunnel face and control large deformations of the surrounding rock.

[0003] Currently, when installing fiberglass anchors in soft rock face tunnels, holes are first drilled in the rock face using an anchor drilling rig. Then, using anchoring devices, the fiberglass anchor and anchoring agent are placed into the borehole. Finally, a fiberglass tray and nut are screwed onto the end of the fiberglass anchor, thus installing the anchor at the tunnel face. While this installation method achieves the installation of fiberglass anchors, it suffers from low installation efficiency. More importantly, due to the rapid extrusion deformation at the tunnel face in soft rock tunnels, the inefficient installation of fiberglass anchors may reduce their anchoring effect, thereby significantly weakening their ability to control large deformations. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of the prior art by providing a method for constructing anchor bolts at the face of soft rock tunnels. By setting a sliding pushing mechanism and a squeezing and pushing mechanism on the support frame, fiberglass anchor bolts can be anchored and installed in the borehole at the face of the tunnel, thereby improving the anchoring effect of the fiberglass anchor bolts.

[0005] The objective of this invention is achieved through the following technical solutions: A method for constructing anchor bolts at the face of a soft rock tunnel, characterized in that the method includes: A construction device is used to install fiberglass anchor bolts at the face of a soft rock tunnel. The construction device includes a support frame, a sliding pushing mechanism, and a pressing and advancing mechanism. The sliding pushing mechanism is installed on the support frame. The pressing and advancing mechanism and the fiberglass anchor bolt are respectively located on both sides of the sliding pushing mechanism. One end of the fiberglass anchor bolt passes through the sliding pushing mechanism and is connected to the interior of the pressing and advancing mechanism. The pressing and advancing mechanism contains anchoring agent. The sliding pushing mechanism is equipped with a rotary drive component for driving the fiberglass anchor bolt to rotate. When the fiberglass anchor needs to be inserted into the borehole, the tail of the fiberglass anchor is fixed to the sliding pushing mechanism and connected to the extrusion pushing mechanism; anchoring agent is filled into the extrusion pushing mechanism, and the support frame is fixedly supported on the working face, so that the head of the fiberglass anchor is aligned with the borehole on the working face; the sliding pushing mechanism is controlled to push the head of the fiberglass anchor into the borehole; after the fiberglass anchor is inserted into the predetermined position in the borehole, the sliding pushing mechanism... The operation is stopped, and the extrusion propulsion mechanism is activated, causing it to inject anchoring agent into the borehole through the hollow fiberglass anchor rod. The sliding push mechanism drives the fiberglass anchor rod to rotate via the rotary drive assembly, thereby stirring the anchoring agent in the borehole. After the anchoring agent in the borehole has solidified, the sliding push mechanism is disconnected from the tail of the fiberglass anchor rod, and the extrusion propulsion mechanism is also disconnected from the tail of the fiberglass anchor rod. The support frame is then moved to the next borehole position to perform anchoring installation on another fiberglass anchor rod.

[0006] The support frame is connected to a fixed support foot at one end near the fiberglass anchor rod.

[0007] The support frame has two opposing guide grooves. The sliding pushing mechanism includes a rotating screw, a first screw nut, a sliding block, a fixed slide plate, guide sliders, an electromagnetic ring, and an electromagnet block. The two ends of the rotating screw are rotatably connected to the two end faces of the support frame. One end of the rotating screw is connected to the output shaft of the drive motor on the support frame. The sliding block has a rotating cavity, and the electromagnetic ring is fixed in the rotating cavity. The sliding block is sleeved on the rotating screw through the first screw nut. The fixed slide plate is installed on the upper surface of the sliding block. A fixing hole, a rotating cavity, and a mounting cavity are sequentially opened at the center of the fixed slide plate. A guide slider is provided at each end of the lower surface of the fixed slide plate. The lower surface of the fixed slide plate slides against the upper surface of the support frame. The two guide sliders are respectively installed in the two guide grooves of the support frame. The electromagnet block is fixed on the lower surface of the guide slider.

[0008] The sliding pushing mechanism is provided with a locking component, which includes a positioning sleeve and a first locking screw. The positioning sleeve is located on the side of the fixed slide plate near the extrusion and pushing mechanism. The fiberglass anchor rod is slidably inserted into the positioning sleeve, and the first locking screw is threadedly connected to the top of the positioning sleeve.

[0009] The rotary drive assembly includes a drive gear, a driven gear, a bearing, and a connecting column. The drive gear is installed in the rotating cavity of the sliding block and is fixedly sleeved on the outer ring surface of the lead screw nut. The teeth of the drive gear are in rotatable contact with the inner ring surface of the electromagnetic ring. The driven gear is installed in the rotating cavity of the fixed slide plate and meshes with the drive gear. The bearing is installed on the mounting cavity of the fixed slide plate. The positioning sleeve is rotatably connected to the mounting cavity through the bearing. The two ends of the connecting column are respectively connected to the driven gear and the positioning sleeve. The connecting column is arranged circumferentially along the driven gear and the positioning sleeve.

[0010] The extrusion propulsion mechanism includes a storage cylinder, a sliding sleeve, a sliding plug, a push rod, a push plate, a locking ring, and an L-shaped slide rod. The storage cylinder contains the anchoring agent. The side of the storage cylinder closest to the fixed slide plate is rotatably connected to the fiberglass anchor rod through the sliding sleeve. The sliding plug is slidably sealed inside the storage cylinder. The sliding plug is connected in sequence to the push rod and the push plate. The rotating screw is connected to the rotating screw through a second screw nut. The locking ring is locked onto the push plate through a second locking screw. Each side of the locking ring is provided with an L-shaped slide rod, and the vertical rod of the L-shaped slide rod is installed in the guide groove of the support frame.

[0011] The advantages of this invention are: (1) A sliding pushing mechanism is set on the support frame. The tail of the fiberglass anchor rod passes through the fixing hole and the tail needs to extend out of the left end face of the positioning sleeve. Then, the locking screw is rotated in the forward direction so that the bottom end face of the locking screw contacts the outer ring face of the inserted fiberglass anchor rod. As the locking screw rotates continuously, it locks the fiberglass anchor rod in the positioning sleeve. Then, the rotating screw can rotate in the support frame. Then, the sliding block can drive the fixed slide plate to move towards the working face on the support frame through the connection between the screw nut and the rotating screw. Then, the fixed slide plate can drive the fiberglass anchor rod locked by the locking assembly to be inserted into the borehole. The extrusion and pushing mechanism can push the anchoring agent into the borehole through the hollow fiberglass anchor rod, thus facilitating the anchoring of the fiberglass anchor rod in the borehole at the working face. (2) By setting a compression and propulsion mechanism on the side of the fixed slide plate, when the fiberglass anchor rod is inserted into the predetermined position of the borehole, the electromagnetic ring is controlled to disengage from the magnetic attraction of the screw nut. Then, the energized electromagnet block magnetically attracts and fixes the fixed slide plate to the support frame. At this time, the rotating screw is controlled to rotate, so that it drives the push rod to slide into the storage cylinder through another screw nut and locking ring. Then, the sliding plug will squeeze the anchoring agent filled in the storage cylinder, so that the anchoring agent will be injected into the borehole through the hollow fiberglass anchor rod. When the fiberglass anchor rod needs to rotate, the rotating drive component is controlled to work, so that the rotating drive component can drive the fiberglass anchor rod to rotate in the borehole, which facilitates the stirring of the anchoring agent injected into the borehole. This not only enables the anchoring agent to be injected into the borehole quickly, but also accelerates the anchoring installation effect of the anchoring agent on the fiberglass anchor rod. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the installation of the fiberglass anchor rod of the present invention; Figure 2 This is a schematic diagram of the construction device of the present invention; Figure 3 This is a cross-sectional view of the fixed sliding plate of the present invention; Figure 4 This is a cross-sectional view of the support frame of the present invention; like Figures 1-4 As shown in the figure, the markings represent: Support frame; 11. Guide groove; Fixed support legs; Sliding and pushing mechanism; 31. Rotating lead screw; 32. First lead screw nut; 33. Sliding block; 331. Rotating cavity; 34. Fixed slide plate; 341. Fixed hole; 342. Rotating cavity; 35. Guide slider; 36. Electromagnetic ring; 37. Electromagnetic block; Locking assembly; 41. Positioning sleeve; 42. First locking screw; Extrusion propulsion mechanism; 51. Storage cylinder; 52. Sliding sleeve; 53. Sliding plug; 54. Push rod; 55. Pushing disc; 56. Locking ring; 57. L-shaped slide bar; Rotary drive assembly; 61. Driven gear; 62. Driven gear; 63. Bearing; 64. Connecting column; 7. Fiberglass anchor bolts. Detailed Implementation

[0013] The features and other related features of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments, so as to facilitate understanding by those skilled in the art: Example: Figures 1-4 As shown, this embodiment relates to a method for constructing anchor bolts at the face of a soft rock tunnel. This method mainly includes: 7. Fiberglass anchor bolts were installed at the face of a soft rock tunnel using construction equipment.

[0014] Among them, such as Figures 1-4 As shown, the construction device includes a support frame 1, fixed legs 2, a sliding pushing mechanism 3, and a pressing and pushing mechanism 5. The right end face of the support frame 1 is fixedly supported by the fixed legs 2 via a support rod. The sliding pushing mechanism 3 is provided on the support frame 1. The sliding pushing mechanism 3 is used to push the hollow fiberglass anchor rod 7 into the borehole opened on the tunnel face. The left end face of the sliding pushing mechanism 3 is provided with the pressing and pushing mechanism 5. The pressing and pushing mechanism 5 is used to push the anchoring agent into the borehole through the hollow fiberglass anchor rod 7 to fix the fiberglass anchor rod 7 in the borehole.

[0015] When inserting the fiberglass anchor rod 7 into the borehole, the construction personnel first need to place the fiberglass anchor rod 7 horizontally on the upper surface of the support frame 1. Based on the borehole depth, the fiberglass tray and nut are twisted onto the tail of the fiberglass anchor rod 7, and the tail of the fiberglass anchor rod 7 is fixed to the sliding pushing mechanism 3. The tail of the fiberglass anchor rod 7 is connected to the extrusion pushing mechanism 5. Then, anchoring agent is filled into the extrusion pushing mechanism 5. The construction personnel then fix the support frame 1 to the working face using the fixed support legs 2, aligning the head of the fiberglass anchor rod 7 with the borehole on the working face. The sliding pushing mechanism 3 is then controlled to continuously push the head of the fiberglass anchor rod 7 into the borehole. When the fiberglass anchor rod 7 is inserted to the predetermined position in the borehole, the sliding pushing mechanism 3 stops working. Then, the extrusion and propulsion mechanism 5 is driven to work, enabling it to inject the anchoring agent into the borehole through the hollow fiberglass anchor rod 7. At the same time, the sliding and pushing mechanism 3 drives the fiberglass anchor rod 7 to rotate, which facilitates the stirring of the anchoring agent in the borehole. After the anchoring agent in the borehole has solidified, the construction personnel directly disconnect the sliding and pushing mechanism 3 from the tail of the fiberglass anchor rod 7 and also disconnect the extrusion and propulsion mechanism 5 from the tail of the fiberglass anchor rod 7. Then, the fixed support leg 2 is removed from the working face, and the support frame 1 can be moved to the next borehole position to anchor another fiberglass anchor rod 7. This eliminates the need for construction personnel to work with multiple machines to install the fiberglass anchor rod 7, thus reducing the efficiency of the fiberglass anchor rod installation.

[0016] In this embodiment, as Figures 1-4As shown, the sliding pushing mechanism 3 includes a rotating screw 31, a first screw nut 32, a sliding block 33, a fixed sliding plate 34, a guide slider 35, and a locking assembly 4. The two ends of the rotating screw 31 are rotatably mounted on the left and right end faces of the support frame 1, and one end face of the rotating screw 31 is connected to the output shaft of the drive motor fixedly mounted on the support frame 1. The sliding block 33 is sleeved on the rotating screw 31 through the first screw nut 32. The fixed sliding plate 34 is set on the upper surface of the sliding block 33, and the lower surface of the fixed sliding plate 34 slides against the upper surface of the support frame 1. A fixing hole 341 is opened at the center of the fixed sliding plate 34. Guide grooves 11 are symmetrically opened in the horizontal length direction on the upper surface of the support frame 1, and guide sliders 35 are slidably arranged in the guide grooves 11. The symmetrical guide sliders 35 are connected to the lower surface of the fixed sliding plate 34. The locking assembly 4 is installed on the left side of the fixed sliding plate 34, and the locking assembly 4 is used to lock and fix the fiberglass anchor rod 7 inserted into the fixing hole 341. When it is necessary to drive the fiberglass anchor rod 7 into the borehole, firstly, the tail of the fiberglass anchor rod 7 is passed through the fixing hole 341 and locked with the locking assembly 4 installed on the left side of the fixing slide plate 34. Then, when the support frame 1 is fixed to the working face by the fixing foot 2, and the head of the fiberglass anchor rod 7 is aligned with the borehole opening, the drive motor on the side of the support frame 1 is controlled to work, so that the rotating screw 31 can rotate within the support frame 1. Then, the sliding block 33 can drive the fixing slide plate 34 to move on the support frame 1 towards the working face through the connection between the first screw nut 32 and the rotating screw 31. Then, the fixing slide plate 34 can drive the fiberglass anchor rod 7, which is locked by the locking assembly 4, into the borehole. The guide slider 35 slides in the guide groove 11 to provide horizontal guidance for the fixing slide plate 34. The function of the device is as follows: When the fiberglass anchor rod 7 is inserted into the borehole to a certain depth, the extrusion and propulsion mechanism 5 is controlled to work, so that the extrusion and propulsion mechanism 5 can push the anchoring agent into the borehole through the hollow fiberglass anchor rod, thereby facilitating the anchoring of the fiberglass anchor rod in the borehole at the working face; when it is necessary to remove the support frame 1 from the borehole, the construction personnel will release the locking component 4 to release the locking and fixing of the tail of the fiberglass anchor rod 7, and then control the drive motor to rotate in the reverse direction, so that the rotating screw 31 can drive the fixed slide plate 34 to slide away from the working face, thereby allowing the tail of the fiberglass anchor rod to detach from the fixing hole 341, thus facilitating the removal and installation of the fixing leg 2 from the working face to the next borehole position, so that the anchoring construction device can continue to quickly and stably anchor the fiberglass anchor rod 7 to the working face.

[0017] In this embodiment, as Figures 1-4As shown, the locking assembly 4 includes a positioning sleeve 41 and a first locking screw 42. The positioning sleeve 41 is located on the left side of the fixing slide plate 34, and a fiberglass anchor rod 7 is slidably inserted into the positioning sleeve 41. The first locking screw 42 is threadedly connected to the top of the positioning sleeve 41, and the bottom end face of the first locking screw 42 is clamped and in contact with the fiberglass anchor rod 7. When it is necessary to lock and fix the fiberglass anchor rod 7, firstly, rotate the first locking screw 42 on the top of the positioning sleeve 41 in the reverse direction so that the bottom end face of the first locking screw 42 is flush with the hole diameter of the positioning sleeve 41. Then, pass the tail of the fiberglass anchor rod 7 through the fixing hole 341, and the tail needs to extend out of the left end face of the positioning sleeve 41. Then, rotate the first locking screw 42 in the forward direction so that the bottom end face of the first locking screw 42 contacts the outer ring surface of the inserted fiberglass anchor rod 7. As the first locking screw 42 rotates continuously, it locks the fiberglass anchor rod 7. The positioning sleeve 41 is fixed inside the positioning sleeve 41, which facilitates the fixing slide plate 34 to drive the fiberglass anchor rod 7 to be stably and accurately inserted into the borehole when sliding horizontally. When it is necessary to disengage the positioning sleeve 41 from the fiberglass anchor rod 7, the construction personnel rotate the first locking screw 42 in the reverse direction, so that the bottom end of the first locking screw 42 is released from the locking and pressing of the fiberglass anchor rod 7. Then, the screw 31 is rotated in the reverse direction, and the positioning sleeve 41 can be disengaged from the tail of the fiberglass anchor rod 7 through the fixing slide plate 34, which makes it easier to remove the support frame 1 from the working face.

[0018] In this embodiment, as Figures 1-4As shown, the sliding propulsion mechanism 3 also includes an electromagnetic ring 36 and an electromagnet block 37. A rotating cavity 331 is provided in the sliding block 33, and the electromagnetic ring 36 is fixed in the rotating cavity 331. An electromagnet block 37 is fixed on the lower surface of the guide slider 35, and the electromagnet block 37 can be magnetically attracted in the guide groove 11. A rotary drive assembly 6 is provided on the sliding propulsion mechanism 3, and the rotary drive assembly 6 is used to drive the fiberglass anchor rod 7 to rotate in the borehole to stir the anchoring agent in the borehole. After the fixed sliding plate 34 drives the fiberglass anchor rod 7 into the borehole, the extrusion and propulsion mechanism 5 needs to inject the anchoring agent into the borehole. At this time, it is necessary to control the first lead screw nut 32 to disengage from the sliding block 33. Then, the construction personnel can control the electromagnetic ring 36 in the rotating cavity 331 to be de-energized through the control panel on the support frame 1, so that the electromagnetic ring 36 loses its magnetism and disengages from the magnetic attraction of the first lead screw nut 32. Then, the electromagnet block 37 on the lower surface of the sliding block 33 is energized, so that the electromagnet block 37 becomes magnetically attracted into the guide groove 11. Then, when the lead screw 31 continues to rotate, it will only drive the extrusion and propulsion mechanism 5 to work, and at the same time, it will only drive the first lead screw nut 32 to work. The first lead screw nut 32 rotates within the rotating cavity 331, facilitating the extrusion and propulsion mechanism 5 to extrude the anchoring agent into the borehole. When the first lead screw nut 32 needs to be connected to the sliding block 33, the control electromagnetic ring 36 is energized, causing it to magnetically adhere to the outer ring surface of the first lead screw nut 32. Then, the electromagnet block 37 is de-energized, causing it to lose its magnetism and detach from the magnetic adsorption of the guide groove 11. When the rotating lead screw 31 rotates, it drives the sliding block 33 to slide through the first lead screw nut 32, thus facilitating the sliding plate 34 to slide on the upper surface of the support frame 1 to insert the fiberglass anchor rod 7 into the borehole.

[0019] In this embodiment, as Figures 1-4As shown, the extrusion propulsion mechanism 5 includes a storage cylinder 51, a sliding sleeve 52, a sliding plug 53, a push rod 54, a push disk 55, a locking ring 56, and an L-shaped slide rod 57. The right end face of the storage cylinder 51 is rotatably and sealingly fitted onto the hollow fiberglass anchor rod 7 extending from the left side of the positioning sleeve 41 via the sliding sleeve 52. The storage cylinder 51 is filled with anchoring agent. The sliding plug 53 is slidably and sealingly disposed inside the storage cylinder 51, and the push rod is fixed to the left end face of the sliding plug 53. 54. A push plate 55 is provided on the left end face of the push rod 54. A second screw nut is also sleeved on the rotating screw 31 away from the left side of the fixed slide plate 34. A locking ring 56 is fixed on the outer ring surface above the second screw nut. The locking ring 56 is locked and sleeved on the push plate 55 by the second locking screw. The end face of the horizontal crossbar of the symmetrical L-shaped slide rod 57 is fixedly connected to the outer ring surface of the locking ring 56. The vertical bar of the L-shaped slide rod 57 is slidably inserted into the guide groove 11.When the tail end of the fiberglass anchor rod 7 extends out of the positioning sleeve 41 and is locked in place by the first locking screw 42, the construction worker then rotates and seals the tail end of the storage cylinder 51 filled with anchoring agent onto the tail end of the fiberglass anchor rod 7 through the sliding sleeve 52. Next, the pushing disc 55 at the end of the pushing rod 54 is inserted into the locking ring 56, and the pushing disc 55 is locked in place by the second locking screw on the locking ring 56. Then, the rotating screw 31 is controlled to rotate. At this time, the rotating screw 31 will simultaneously drive the locking ring 56 and the fixing slide plate 34 on the support frame 1 through the two screw nuts (the first screw nut 32 and the second screw nut), thus allowing the fixing slide plate 34 to push the fiberglass anchor rod 7 into the borehole. The distance between the locking ring 56 and the fixed slide plate 34 remains unchanged, thus preventing the push rod 54 from causing the sliding plug 53 to slide within the storage cylinder 51 and compress the anchoring agent. When the fiberglass anchor rod 7 is inserted into the predetermined position in the borehole, the control electromagnetic ring 36 disengages from the magnetic attraction of the first lead screw nut 32. Then, the energized electromagnet block 37 magnetically attaches the fixed slide plate 34 to the support frame 1. The control screw 31 continues to rotate, causing it to drive the push rod 54 into the storage cylinder 51 via the second lead screw nut and locking ring 56. This causes the sliding plug 53 to compress the anchoring agent within the storage cylinder 51, allowing the anchoring agent to be injected into the borehole through the hollow fiberglass anchor rod 7. When the fiberglass anchor rod 7 needs to rotate... During operation, the rotary drive assembly 6 is activated, enabling it to drive the fiberglass anchor rod 7 to rotate within the borehole. This facilitates the mixing of the anchoring agent injected into the borehole. Once the anchoring agent in the storage cylinder 51 is fully injected, the electromagnetic ring 36 is energized to magnetically attract the first lead screw nut 32 within the rotating cavity 331. The electromagnet block 37 then disengages from the magnetic attraction of the guide groove 11, causing the lead screw 31 to rotate further, inserting the remaining fiberglass anchor rod 7 into the borehole. The anchoring agent then solidifies, securing the fiberglass anchor rod 7. When it is necessary to detach the fixing slide plate 34 from the fiberglass anchor rod 7, the first locking screw 42 on the positioning sleeve 41 is first released from its locking position on the fiberglass anchor rod 7. The reverse rotation of the lead screw 31 will cause the fixed slide plate 34 to move away from the working face. Since the sliding sleeve 52 is rotatably sealed to the fiberglass anchor rod 7, when the fixed slide plate 34 slides in the reverse direction on the support frame 1, it will cause the sliding sleeve 52 at the end of the storage cylinder 51 to disengage from the fiberglass anchor rod 7, thus facilitating the disengagement of the storage cylinder 51 from the fiberglass anchor rod 7. When it is necessary to fill the storage cylinder 51 with anchoring agent, the construction personnel will rotate the second locking screw on the locking ring 56 in the reverse direction to disengage it from the locking of the push plate 55, thus facilitating the removal of the storage cylinder 51 and the push rod 54 from the support frame 1, and then facilitating the injection of anchoring agent into the storage cylinder 51.

[0020] In this embodiment, as Figures 1-4 As shown, the rotary drive assembly 6 includes a drive gear 61, a driven gear 62, a bearing 63, and connecting posts 64. The drive gear 61 is fixedly sleeved on the outer ring surface of the first lead screw nut 32, and the teeth of the drive gear 61 are in rotatable contact with the inner ring surface of the electromagnetic ring 36. A rotating cavity 342 is provided in the fixed slide plate 34, which is connected to the rotating cavity 331. The drive gear 61 is rotatably arranged in the rotating cavity 342, and the drive gear 61 meshes with the driven gear 62 for transmission. An installation cavity is provided on the left side of the rotating cavity 342, and a positioning sleeve 41 is rotatably installed in the installation cavity through the bearing 63. The inner ring diameter of the positioning sleeve 41 is smaller than the diameter of the inner ring of the bearing 63. One end face of multiple connecting posts 64 is circumferentially arrayed and connected to the side of the driven gear 62, and the other end face of multiple connecting posts 64 is connected to the right end face of the positioning sleeve 41. When the fiberglass anchor rod 7 needs to be driven to rotate inside the borehole, the electromagnetic ring 36 in the control rotation cavity 331 is de-energized. The rotating screw 31 continues to rotate, driving the drive gear 61 to rotate within the rotation cavity 331 via the first screw nut 32. Therefore, the drive gear 61, through the meshing of the driven gear 62 and the connecting column 64, drives the positioning sleeve 41 to rotate. Since the fiberglass anchor rod 7 is locked and fixed within the positioning sleeve 41, the rotation of the positioning sleeve 41 drives the fiberglass anchor rod 7 to rotate inside the borehole. And since the storage cylinder 51 is rotated and sealed within the fiberglass via the sliding sleeve 52... The steel anchor rod 7 is positioned at the tail end, so that the fiberglass anchor rod 7 will not affect the injection of the anchoring agent into the borehole when it rotates, thus facilitating the simultaneous injection and rotation of the fiberglass anchor rod 7. When the fiberglass anchor rod 7 needs to be further inserted into the borehole, the control electromagnetic ring 36 is energized, causing it to generate a magnetic attraction force on the drive gear 61, thus facilitating the magnetic attraction connection between the first lead screw nut 32 and the sliding block 33 in the rotating cavity 331. This allows the rotating lead screw 31 to drive the fixed slide plate 34 through the sliding block 33 to push the locked fiberglass anchor rod 7 further into the borehole.

[0021] The beneficial technical effects of this embodiment are as follows: (1) A sliding pushing mechanism is set on the support frame. The tail of the fiberglass anchor rod passes through the fixing hole and the tail needs to extend out of the left end face of the positioning sleeve. Then, the locking screw is rotated in the forward direction so that the bottom end face of the locking screw contacts the outer ring face of the inserted fiberglass anchor rod. As the locking screw rotates continuously, it locks the fiberglass anchor rod in the positioning sleeve. Then, the rotating screw can rotate in the support frame. Then, the sliding block can drive the fixed slide plate to move towards the working face on the support frame through the connection between the screw nut and the rotating screw. Then, the fixed slide plate can drive the fiberglass anchor rod locked by the locking assembly to be inserted into the borehole. The extrusion and pushing mechanism can push the anchoring agent into the borehole through the hollow fiberglass anchor rod, thus facilitating the anchoring of the fiberglass anchor rod in the borehole at the working face. (2) By setting a compression and propulsion mechanism on the side of the fixed slide plate, when the fiberglass anchor rod is inserted into the predetermined position of the borehole, the electromagnetic ring is controlled to disengage from the magnetic attraction of the screw nut. Then, the energized electromagnet block magnetically attracts and fixes the fixed slide plate to the support frame. At this time, the rotating screw is controlled to rotate, so that it drives the push rod to slide into the storage cylinder through another screw nut and locking ring. Then, the sliding plug will squeeze the anchoring agent filled in the storage cylinder, so that the anchoring agent will be injected into the borehole through the hollow fiberglass anchor rod. When the fiberglass anchor rod needs to rotate, the rotating drive component is controlled to work, so that the rotating drive component can drive the fiberglass anchor rod to rotate in the borehole, which facilitates the stirring of the anchoring agent injected into the borehole. This not only enables the anchoring agent to be injected into the borehole quickly, but also accelerates the anchoring installation effect of the anchoring agent on the fiberglass anchor rod.

[0022] Although the above embodiments have described the concept and embodiments of the present invention in detail with reference to the accompanying drawings, those skilled in the art will recognize that various improvements and modifications can still be made to the present invention without departing from the scope of the claims, and therefore will not be elaborated here.

Claims

1. A method for constructing anchor bolts at the face of a soft rock tunnel, characterized in that... The construction method includes: A construction device is used to install fiberglass anchor bolts at the face of a soft rock tunnel. The construction device includes a support frame, a sliding pushing mechanism, and a pressing and advancing mechanism. The sliding pushing mechanism is installed on the support frame. The pressing and advancing mechanism and the fiberglass anchor bolt are respectively located on both sides of the sliding pushing mechanism. One end of the fiberglass anchor bolt passes through the sliding pushing mechanism and is connected to the interior of the pressing and advancing mechanism. The pressing and advancing mechanism contains anchoring agent. The sliding pushing mechanism is equipped with a rotary drive component for driving the fiberglass anchor bolt to rotate. When the fiberglass anchor needs to be inserted into the borehole, the tail of the fiberglass anchor is fixed to the sliding pushing mechanism and connected to the extrusion pushing mechanism; anchoring agent is filled into the extrusion pushing mechanism, and the support frame is fixedly supported on the working face, so that the head of the fiberglass anchor is aligned with the borehole on the working face; the sliding pushing mechanism is controlled to push the head of the fiberglass anchor into the borehole; after the fiberglass anchor is inserted into the predetermined position in the borehole, the sliding pushing mechanism... The operation is stopped, and the extrusion propulsion mechanism is activated, causing it to inject anchoring agent into the borehole through the hollow fiberglass anchor rod. The sliding push mechanism drives the fiberglass anchor rod to rotate via the rotary drive assembly, thereby stirring the anchoring agent in the borehole. After the anchoring agent in the borehole has solidified, the sliding push mechanism is disconnected from the tail of the fiberglass anchor rod, and the extrusion propulsion mechanism is also disconnected from the tail of the fiberglass anchor rod. The support frame is then moved to the next borehole position to perform anchoring installation on another fiberglass anchor rod. The support frame has two opposing guide grooves. The sliding pushing mechanism includes a rotating screw, a first screw nut, a sliding block, a fixed slide plate, guide sliders, an electromagnetic ring, and an electromagnet block. The two ends of the rotating screw are rotatably connected to the two end faces of the support frame. One end of the rotating screw is connected to the output shaft of the drive motor on the support frame. The sliding block has a rotating cavity, and the electromagnetic ring is fixed in the rotating cavity. The sliding block is sleeved on the rotating screw through the first screw nut. The fixed slide plate is installed on the upper surface of the sliding block. A fixing hole, a rotating cavity, and a mounting cavity are sequentially opened at the center of the fixed slide plate. A guide slider is provided at each end of the lower surface of the fixed slide plate. The lower surface of the fixed slide plate slides against the upper surface of the support frame. The two guide sliders are respectively installed in the two guide grooves of the support frame. The electromagnet block is fixed on the lower surface of the guide slider.

2. The method for constructing anchor bolts at the face of a soft rock tunnel as described in claim 1, characterized in that... The support frame is connected to a fixed support foot at one end near the fiberglass anchor rod.

3. The method for constructing anchor bolts at the face of a soft rock tunnel as described in claim 1, characterized in that... The sliding pushing mechanism is provided with a locking component, which includes a positioning sleeve and a first locking screw. The positioning sleeve is located on the side of the fixed slide plate near the extrusion and pushing mechanism. The fiberglass anchor rod is slidably inserted into the positioning sleeve, and the first locking screw is threadedly connected to the top of the positioning sleeve.

4. The method for constructing anchor bolts at the face of a soft rock tunnel as described in claim 3, characterized in that... The rotary drive assembly includes a drive gear, a driven gear, a bearing, and a connecting column. The drive gear is installed in the rotating cavity of the sliding block and is fixedly sleeved on the outer ring surface of the first lead screw nut. The teeth of the drive gear are in rotatable contact with the inner ring surface of the electromagnetic ring. The driven gear is installed in the rotating cavity of the fixed slide plate and meshes with the drive gear. The bearing is installed on the mounting cavity of the fixed slide plate. The positioning sleeve is rotatably connected to the mounting cavity through the bearing. The two ends of the connecting column are respectively connected to the driven gear and the positioning sleeve. The connecting column is arranged circumferentially along the driven gear and the positioning sleeve.

5. The method for constructing anchor bolts at the face of a soft rock tunnel as described in claim 4, characterized in that... The extrusion propulsion mechanism includes a storage cylinder, a sliding sleeve, a sliding plug, a push rod, a push plate, a locking ring, and an L-shaped slide rod. The storage cylinder contains the anchoring agent. The side of the storage cylinder closest to the fixed slide plate is rotatably connected to the fiberglass anchor rod through the sliding sleeve. The sliding plug is slidably sealed inside the storage cylinder. The sliding plug is connected in sequence to the push rod and the push plate. The rotating screw is connected to the rotating screw through a second screw nut. The locking ring is locked onto the push plate through a second locking screw. Each side of the locking ring is provided with an L-shaped slide rod, and the vertical rod of the L-shaped slide rod is installed in the guide groove of the support frame.

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