Tunnel arch frame anchor rod construction device

Abstract

The invention relates to the technical field of anchor rods, in particular to a tunnel arch frame anchor rod construction device. Comprising a tail shell, a wedge head assembly installed at one end of the tail shell, an extension part installed at the other end of the tail shell, a binder soft bag arranged in a cavity formed by the tail shell and the extension part, a breaking nail fixed in the tail shell and a tenon piece arranged on the wedge head assembly, an overflow hole is formed in the tail shell, and a binder flows out through the overflow hole; according to the expansion-shell anchor head with the built-in adhesive soft bag, when the expansion-shell anchor head is nailed into a rock-soil layer and prestress is formed, the bonding tightness of the anchor head and the surrounding rock-soil layer can be further enhanced through the adhesive, loosening is not prone to occurring, the construction stability of the whole anchor rod is improved, and compared with an existing mode that an adhesive is arranged in an anchor rod, the expansion-shell anchor head has the advantages of being simple in structure and convenient to use. And the binding agent of the anchor head part is more fully covered, and the binding degree is better.

Description

Technical Field

[0001] The present invention relates to the technical field of anchor bolts, and particularly relates to a construction device for tunnel arch frame anchor bolts. Background Art

[0002] During tunnel construction operations, when encountering soft surrounding rock, it is necessary to promptly install arch frames as initial support to control the deformation of the surrounding rock and prevent collapse; at the same time, anchor bolt construction is carried out to increase the self-stability of the rock and provide stable support and connection for the arch frame. The installation quality of the anchor bolts directly affects the construction progress and quality of the tunnel.

[0003] Currently, common anchor bolts include resin anchor bolts and mortar anchor bolts, etc. Resin anchor bolts have the characteristics of short setting time and fast force application. The construction process of the anchor bolts is to drill an anchor hole, send a resin cartridge into the anchor hole, insert the anchor bolt, and rotate the anchor bolt to crush the resin cartridge, so that the resin cartridge is mixed and solidified to anchor the anchor bolt. In the second step, the resin cartridge is usually sent into the bottom of the anchor hole by directly pushing it with high-pressure water or high-pressure air. However, during use, due to factors such as the axis of the anchor hole not being a standard straight line (i.e., the hole is not straight), the large friction between the resin cartridge and the anchor hole, and the softness of the resin cartridge itself and poor directivity, it is very difficult to send the resin cartridge in place. Therefore, there appears an anchor bolt with an extrusion-type hidden medicine cartridge on the market, which realizes the hidden medicine cartridge by setting two anchor bolts with different diameters, and only by rotating the second hollow anchor bolt body can the resin in the hidden medicine cartridge be pushed out into the anchor hole and the resin in the anchor hole be stirred.

[0004] However, after the resin in the anchor bolt of the extrusion-type hidden medicine cartridge anchor bolt is extruded, its fluidity in the rock formation is poor, and basically only a resin reinforcement layer is formed around the rod body of the anchor bolt, and it cannot cover the expansion shell head part at the end of the anchor bolt. The expansion shell head only relies on the expansion and biting method to combine with the rock formation, and there is a situation of insufficient combination strength. Summary of the Invention

[0005] In order to overcome the problem that in the existing hidden resin reinforcement anchor bolt, the resin cannot cover the area of the anchor head after extrusion, and the combination degree between the anchor head and the surrounding rock and soil layers is poor.

[0006] The technical solution of the present invention is as follows: A tunnel arch frame bolt construction device includes a tail shell, a wedge head assembly installed at one end of the tail shell, an extension part installed at the other end of the tail shell, a binder soft package arranged in the cavity formed by the tail shell and the extension part, a breaking nail fixed in the tail shell, and a tenon part arranged on the wedge head assembly. The extension part is used to lengthen the internal space of the tail shell. The wedge head assembly is used to insert into the rock and soil layer of the anchor hole. The breaking nail is used to break the binder soft package. The binder soft package is used to fill the binder for solidifying the rock and soil layer. An overflow hole is opened on the tail shell, and the overflow hole is used for the binder to flow out. The tenon part is used to position the tail shell, the extension part and the wedge head assembly on the rock and soil layer; The wedge head assembly includes an inner wedge head fixedly connected to the tail shell, a sliding groove arranged on the inner wedge head, and a wedge piece slidably connected to the sliding groove. The wedge piece slides axially along the sliding groove. When the wedge piece slides out of the sliding groove, the wedge head assembly is in an open state; When the wedge piece slides back into the sliding groove, the wedge head assembly is in a retracted state; A limiting component is installed on the wedge head assembly, and the limiting component is used to limit the inner wedge head and the wedge piece. The limiting component includes an I-shaped groove opened on the inner wedge head and an I-shaped frame fixedly connected to the wedge piece. The I-shaped frame is slidably connected in the I-shaped groove.

[0007] Preferably, the extension part includes a fixed extension shell welded and fixed to the tail shell and a plurality of first orifices equidistantly opened on the fixed extension shell. The fixed extension shell is used to lengthen the internal space of the tail shell. The binder soft package is arranged in the cavity formed by the tail shell and the fixed extension shell. The first orifices are used for the concrete mortar to flow out from them.

[0008] Preferably, the extension part includes an extension shell module threadedly connected to the tail shell and second orifices opened on the extension shell module. One end of the extension shell module is provided with a screw thread, and the other end is provided with a screw ring. The screw ring is threadedly connected to the tail shell and fixes the extension shell module to the tail shell. A plurality of adjacent extension shell modules are connected to each other in pairs through corresponding screw threads and screw rings. The second orifices are used for the concrete mortar to flow out from them.

[0009] Preferably, a check component is installed on the inner wedge head, and the check component is used to fix the wedge piece. The check component includes an elastic piece fixedly connected to the inner wedge head and a hook fixedly connected to the elastic piece. The elastic pieces are arranged in one-to-one correspondence with the wedge pieces. A bayonet adapted to the hook is opened on the wedge piece. When the wedge piece slides out of the sliding groove, the hook is caught in the bayonet and fixes the wedge piece; When sliding back into the sliding groove, the I-shaped frame squeezes the elastic piece and the hook towards the axis side of the inner wedge head.

[0010] Preferably, the tenon part includes a positioning tenon one, and the positioning tenon one is welded and fixed on the inner wedge head. The positioning tenon one is located between the I-shaped grooves.

[0011] Preferably, the tenon component includes a second positioning tenon, a movable disk installed on the second positioning tenon and a No. 2 center hole channel opened in the middle of the movable disk, the movable disk is used to adjust the angle of the second positioning tenon, a No. 1 center hole channel is opened on the inner wedge head, and the movable disk is movably connected in the No. 1 center hole channel, when the second positioning tenon is rotated onto the I-slot, the wedge piece is limited in the slide groove; when the second positioning tenon is rotated away from the I-slot, the wedge piece can slide out along the slide groove.

[0012] Preferably, a locking assembly is installed on the inner wedge head, and the locking assembly is used to limit the movable disk. The locking assembly includes a shaft column inserted in the cavity formed by the No. 1 center hole channel and the No. 2 center hole channel, a locking block fixedly connected to the shaft column, an end plate fixedly connected to one end of the shaft column and a spring fixedly connected to the end plate. A locking groove is opened in the No. 2 center hole channel, and the spring is fixedly connected between the end plate and the inner wedge head. The spring is used to pull the shaft column to move axially in the No. 2 center hole channel. When the second positioning tenon rotates away from the I-slot, the locking block is inserted into the corresponding locking groove.

[0013] Preferably, a guide flange is provided in the No. 1 center hole channel, and a guide keyway corresponding to and matching the guide flange is provided on the shaft column. The guide flange is slidably connected in the guide keyway. The guide flange is used to limit the rotational movement of the shaft column. A protective ring is fixedly connected to the shaft column. The protective ring is an inverted cone-shaped structure. The protective ring is blocked between the No. 2 center hole channel and the rock and soil layer.

[0014] Preferably, a flow channel is provided on the inner wedge head, and a seepage channel is provided on the second positioning tenon. When the second positioning tenon is rotated away from the I-slot, the seepage channel is connected with the flow channel.

[0015] Preferably, a circular knife with an arc structure is fixedly connected to the wedge, and the circular knife is used to cut open the adhesive soft bag.

[0016] Beneficial effects of the present invention: 1. Through the expansion shell anchor head with built-in adhesive soft bag, while being nailed into the rock and soil layer and forming prestress, the adhesive can be used to further strengthen the bonding tightness between the anchor head and the surrounding rock and soil layer, making it less likely to loosen, thereby improving the stability of the entire anchor construction. Compared with the existing method of setting adhesive inside the anchor rod, the adhesive coverage of the anchor head part is more sufficient and the bonding degree is better; 2. According to the different stability of rock and soil layers in different geological environments and the different levels of construction design requirements, the extension part can be designed as a structure assembled and lengthened by multiple blocks, which is convenient for accommodating the appropriate amount of adhesive according to needs and has stronger applicability; 3. Through the non-return assembly set in the expansion shell anchor head, the wedge can be fixed after it is pushed out and inserted into the rock and soil layer, preventing the wedge from falling out of the rock and soil layer due to the stirring of the resin caused by the insertion and extraction of the inner anchor rod, thereby ensuring the stability of the combination of the wedge and the rock and soil layer; 4. Compared with the traditional method of using a clamp to fix the wedge piece to prevent it from sliding out of the inner wedge head when not in use, this solution realizes the locking and unlocking of the wedge piece through the rotation assembly cooperating with the positioning tenon II. After inserting into the anchor hole, the wedge piece is unlocked by rotating the positioning tenon II relative to the wedge head assembly. The ejection of the wedge piece is more convenient and labor-saving. 5. The locking assembly is used to maintain the unlocked state of the positioning tenon II on the wedge piece. During the process of the wedge piece sliding out, there will be no relative rotation between the positioning tenon II, the wedge head assembly, and the hollow anchor rod again, and the stability of the hollow anchor rod and the wedge head assembly in the anchor hole is better. 6. Utilizing the spring in the locking piece, once the wedge piece is unlocked when not in use, the user can adjust the positioning tenon II again by pulling the shaft column and re-lock it, which is convenient and fast to operate. 7. The protective ring set on the shaft column can block the second middle hole channel when the expanding shell anchor head is inserted into the rock and soil layer, avoiding the entry of broken soil that may cause the locking groove to be blocked and preventing the locking block from being unable to be inserted into the locking groove. This ensures that after the positioning tenon II rotates to unlock the wedge piece, it can be in a locked state with the inner wedge head, so that the positioning tenon II, the inner wedge head, the wedge piece, and the hollow anchor rod will not rotate in the anchor hole, improving the stability. 8. Compared with the traditional expanding shell anchor head with a closed end, through the through-hole structure formed after the positioning tenon II unlocks the wedge piece, the binder can penetrate and diffuse outward from the end of the expanding shell anchor head, and the wrapping and reinforcement of the wedge piece part and the surrounding rock and soil layer are faster. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Shown is the overall three-dimensional structure schematic diagram of the first embodiment of the tunnel arch support bolt construction device of the present invention including the extension part; Figure 2 Shown is the overall internal structure schematic diagram of the first embodiment of the tunnel arch support bolt construction device of the present invention including the extension part; Figure 3 Shown is the overall three-dimensional structure schematic diagram of the second embodiment of the tunnel arch support bolt construction device of the present invention including the extension part; Figure 4 Shown is the overall internal structure schematic diagram of the second embodiment of the tunnel arch support bolt construction device of the present invention including the extension part; Figure 5 Shown is another state of the overall three-dimensional structure schematic diagram of the second embodiment of the tunnel arch support bolt construction device of the present invention including the extension part; Figure 6 Shown is another state of the overall internal structure schematic diagram of the second embodiment of the tunnel arch support bolt construction device of the present invention including the extension part; Figure 7 Shown is a schematic structural diagram of a second embodiment of an extension part in the tunnel arch bolt construction device of the present invention; Figure 8 Shown is a schematic structural diagram of a wedge head assembly in the tunnel arch bolt construction device of the present invention; Figure 9 Shown is the Figure 8 schematic diagram of the partial enlarged structure at location A in the Figure 10 Shown is a schematic structural diagram of a wedge piece of the present invention; Figure 11 Shown is a schematic structural diagram of a locking assembly of the present invention; Figure 12 Shown is a schematic diagram of the cooperation between a second positioning tenon and a rotating assembly of the present invention; Figure 13 Shown is another state schematic structural diagram of the second positioning tenon and the rotating assembly of the present invention; Figure 14 Shown is the Figure 4 schematic diagram of the partial enlarged structure at location B in the Figure 15 Shown is the Figure 6 schematic diagram of the partial enlarged structure at location C in the

[0018] Explanation of reference numerals: 1. Tail shell; 3. Adhesive soft package; 4. Breaking nail; 5. Overflow hole; 601. First positioning tenon; 602. Second positioning tenon; 9. Inner bolt; 11. Bayonet; 12. First middle hole channel; 14. Locking groove; 15. Guide flange; 16. Guide key groove; 17. Protective ring; 18. Flow through hole channel; 19. Seepage hole channel; 20. Ring cutter; 201. Inner wedge head; 202. Chute; 203. Wedge piece; 701. I-shaped groove; 702. I-shaped frame; 801. Fixed extension shell; 802. First hole opening; 803. Extension shell module; 804. Threaded port; 805. Threaded ring; 806. Second hole opening; 1001. Elastic piece; 1002. Hook; 1201. Movable disk; 1202. Second middle hole channel; 1301. Shaft column; 1302. Locking block; 1303. End plate; 1304. Spring. Detailed implementation manners

[0019] The present invention will be further described below with reference to the drawings and embodiments.

[0020] Please refer to Figures 1 - 8 , Figure 10 and Figures 12 - 13, the present invention provides an embodiment: a tunnel arch frame bolt construction device, which includes a tail shell 1, a wedge head assembly installed at one end of the tail shell 1, an extension part installed at the other end of the tail shell 1, an adhesive soft package 3 arranged in the cavity formed by the tail shell 1 and the extension part, a breaking nail 4 fixed in the tail shell 1, and a tenon member arranged on the wedge head assembly. The extension part is used to lengthen the internal space of the tail shell 1. The wedge head assembly is used to insert into the rock and soil layer of the anchor hole. The breaking nail 4 is used to break the adhesive soft package 3. The adhesive soft package 3 is used to fill the adhesive for solidifying the rock and soil layer. An overflow hole 5 is opened on the tail shell 1, and the overflow hole 5 is used for the adhesive to flow out. The tenon member is used to position the tail shell 1, the extension part and the wedge head assembly on the rock and soil layer. The wedge head assembly includes an inner wedge head 201 fixedly connected to the tail shell 1, a chute 202 arranged on the inner wedge head 201, and a wedge piece 203 slidably connected to the chute 202. The wedge piece 203 slides axially along the chute 202. When the wedge piece 203 slides out of the chute 202, the wedge head assembly is in an open state. When the wedge piece 203 slides back into the chute 202, the wedge head assembly is in a retracted state. A limiting component is installed on the wedge head assembly, and the limiting component is used to limit the inner wedge head 201 and the wedge piece 203. The limiting component includes an I-shaped groove 701 opened on the inner wedge head 201 and an I-shaped frame 702 fixedly connected to the wedge piece 203. The I-shaped frame 702 is slidably connected in the I-shaped groove 701. After the user fixes the extension part on the tail shell 1 to the hollow bolt and inserts it into the anchor hole in the rock and soil layer until the tenon member inserts into the rock and soil at the bottom of the anchor hole, then the inner bolt 9 is inserted into the hollow bolt until it is pushed into the extension part and the tail shell 1. The breaking nail 4 is cooperated to break the adhesive soft package 3. With the continuous pushing of the inner bolt 9, the wedge piece 203 in the wedge head assembly slowly pushes out along the chute 202, and the I-shaped groove 701 and the I-shaped frame 702 in the limiting component play a guiding and limiting role to prevent the wedge piece 203 from falling off the inner wedge head 201. Finally, the wedge piece 203 pierces into the rock and soil layer to form prestress. At the same time, the adhesive in the adhesive soft package 3 (which can be resin, or planting bar glue, structural glue and other materials) flows out to the surrounding rock and soil layer through the gap between the overflow hole 5, the inner wedge head 201 and the wedge piece 203, and gradually penetrates and wraps the rock and soil within a certain range, so that the expanding shell anchor head is fully combined with the surrounding rock and soil layer.

[0021] Please refer to Figures 1 - 2, in the first embodiment of the extension part, the extension part includes a fixed extension shell 801 welded and fixed on the tail shell 1 and a number of first orifice openings 802 equidistantly arranged on the fixed extension shell 801. The fixed extension shell 801 is used to lengthen the internal space of the tail shell 1. The binder soft package 3 is arranged in the cavity formed by the tail shell 1 and the fixed extension shell 801. The first orifice openings 802 are used to allow the concrete mortar to flow out therefrom. According to the stability of the rock and soil layers in the geological environment, the different chemical and physical properties of different binders, and the corresponding construction design requirements in the area where the anchor rod construction is located, the fixed extension shell 801 with a fixed length (generally 20 cm - 120 cm, and the length of the fixed extension shell 801 can also be increased or decreased according to different design needs) is welded on the tail shell 1 to form an integral body. Then, the binder soft package 3 filled with binder is placed therein and made to closely adhere to the breaking nail 4. After the binder soft package 3 is punctured, it flows out from the overflow port. After the binder is cured, concrete mortar is poured into the hollow anchor rod. After the hollow anchor rod is filled with the concrete mortar, it flows out from the first orifice openings 802 and penetrates into the surrounding rock and soil layers.

[0022] Please refer to Figures 3 - 8 , in the second embodiment of the extension part, the extension part includes an extension shell module 803 threadedly connected to the tail shell 1 and a second orifice opening 806 arranged on the extension shell module 803. One end of the extension shell module 803 is provided with a screw thread opening 804, and the other end is provided with a screw ring 805. The screw ring 805 is threadedly connected to the tail shell 1 to fix the extension shell module 803 to the tail shell 1. A number of adjacent extension shell modules 803 are connected to each other in pairs through the corresponding screw thread openings 804 and screw rings 805. The second orifice opening 806 is used to allow the concrete mortar to flow out therefrom. According to the stability of the rock and soil layers in the geological environment, the different chemical and physical properties of different binders, and the corresponding construction design requirements in the area where the anchor rod construction is located, a number of extension shell modules 803 (the quantity can be increased or decreased according to different design needs) are connected to each other in pairs through the screw thread openings 804 and screw rings 805, and are fixed to the tail shell 1 and the hollow anchor rod by using the same threaded connection and assembly method. Then, the binder soft package 3 filled with binder is placed therein and made to closely adhere to the breaking nail 4. After the binder soft package 3 is punctured, it flows out from the overflow port. After the binder is cured, concrete mortar is poured into the hollow anchor rod. After the hollow anchor rod is filled with the concrete mortar, it flows out from the second orifice opening 806 and penetrates into the surrounding rock and soil layers.

[0023] Please refer to Figures 3 - 6 , Figures 8 - 10 and Figures 14 - 15, in this embodiment, a check component is installed on the inner wedge head 201. The check component is used to fix the wedge piece 203. The check component includes an elastic piece 1001 fixedly connected to the inner wedge head 201 and a hook 1002 fixedly connected to the elastic piece 1001. The elastic pieces 1001 are arranged in one-to-one correspondence with the wedge pieces 203. A bayonet 11 adapted to the hook 1002 is formed on the wedge piece 203. When the wedge piece 203 slides out of the chute 202, the hook 1002 snaps into the bayonet 11 to fix the wedge piece 203. When sliding back into the chute 202, the I-shaped frame 702 squeezes the elastic piece 1001 and the hook 1002 towards one side of the central axis of the inner wedge head 201. When the inner anchor rod 9 pushes the wedge piece 203, the wedge piece 203 slides outwards along the chute 202 and expands and inserts into the rock and soil layer. As the wedge piece 203 slides out, the distance between the I-shaped frames 702 gradually increases, and the squeezing effect on the elastic piece 1001 and the hook 1002 weakens, so that the elastic piece 1001 and the hook 1002 always maintain a posture of closely adhering to the I-shaped frame 702 with a tendency to expand outwards. When the wedge piece 203 slides in place, the hook 1002 automatically snaps into the bayonet 11 as the elastic piece 1001 opens, fixing the corresponding wedge piece 203 to prevent the wedge piece 203 from sliding back and forth along the chute 202, and avoiding dragging the wedge piece 203 back into the chute 202 due to the adhesion of the binder during the process of the inner anchor rod 9 stirring the binder.

[0024] Please refer to Figures 1 - 2 , in the first embodiment based on the tenon member, the tenon member includes a positioning tenon one 601. The positioning tenon one 601 is fixedly welded to the inner wedge head 201. The positioning tenon one 601 is located between the I-shaped grooves 701. After the positioning tenon one 601 is inserted into the rock and soil layer, due to the wrapping effect of the rock and soil layer on the positioning tenon one 601, it will not rotate in the rock and soil layer itself. Furthermore, the inner wedge head 201, the tail shell 1, the extension part and the hollow anchor rod fixed to the positioning tenon one 601 maintain a fixed posture. When the inner anchor rod 9 is inserted and rotated, by means of the frictional force formed by the wrapping effect between the positioning tenon one 601 and the surrounding rock and soil layer, the hollow anchor rod is prevented from rotating following the inner anchor rod 9.

[0025] Please refer to Figures 3 - 6 , Figures 8 - 9 and Figures 12 - 15In the second embodiment of the tenon member, the tenon member includes a second positioning tenon 602, a movable plate 1201 installed on the second positioning tenon 602, and a second center hole channel 1202 opened in the middle of the movable plate 1201. The movable plate 1201 is used to adjust the angle of the second positioning tenon 602. A first center hole channel 12 is opened on the inner wedge head 201. The movable plate 1201 is movably connected to the first center hole channel 12. When the second positioning tenon 602 rotates to the I-shaped groove 701, the wedge piece 203 is limited in the slide groove 202; when the second positioning tenon 602 rotates away from the I-shaped groove 701, the wedge piece 203 can slide along the slide groove 202. After the groove 202 slides out and the positioning tenon 202 is inserted into the rock and soil layer, the user holds the hollow anchor rod with his hand to rotate it. Because the rock and soil layer holds the positioning tenon 202, it itself will not rotate in the rock and soil layer. However, due to the movable connection between the movable disk 1201 and the No. 1 center hole channel 12, the inner wedge head 201, the tail shell 1, the extension part and the hollow anchor rod can rotate relative to the movable disk 1201 until the positioning tenon 202 is rotated to be offset from the I-slot 701. At this time, the wedge piece 203 is no longer limited by the positioning tenon 202, and when the inner anchor rod 9 pushes the wedge piece 203, the wedge piece 203 can slide freely.

[0026] See also Figures 3 - 6 , Figures 8 - 9 and Figures 11 - 15In this embodiment, a locking assembly is installed on the inner wedge head 201, and the locking assembly is used to limit the movable disk 1201. The locking assembly includes a shaft column 1301 inserted into the cavity formed by the No. 1 middle hole channel 12 and the No. 2 middle hole channel 1202, a locking block 1302 fixedly connected to the shaft column 1301, an end plate 1303 fixedly connected to one end of the shaft column 1301, and a spring 1304 fixedly connected to the end plate 1303. The No. 2 middle hole channel 1 A locking groove 14 is provided in 202, and a spring 1304 is fixedly connected between the end plate 1303 and the inner wedge head 201. The spring 1304 is used to pull the shaft column 1301 to move axially in the second middle hole channel 1202. When the second positioning tenon 602 rotates away from the I-shaped groove 701, the locking block 1302 is inserted into the corresponding locking groove 14, and the hollow anchor rod is continuously rotated to rotate the second positioning tenon 602 to stagger with the I-shaped groove 701, and the locking When the locking block 1302 is in the locked position, the spring 1304 will be pulled back to move the locking block 1302 into the locking groove 14, and the wedge 203 will be locked again by rotating the second positioning tenon 602 and the shaft column 1301, the inner wedge head 201, the tail shell 1, the extension part and the hollow anchor rod. When the inner anchor rod 9 is inserted and rotated, the friction force formed by the gripping effect of the second positioning tenon 602 and the surrounding rock and soil layers is used to prevent the hollow anchor rod from rotating with the inner anchor rod 9. When the expansion shell anchor head is not in use, if the movable disk 1201 rotates relative to the inner wedge head 201 and causes the wedge piece 203 to be accidentally unlocked, the shaft column 1301 can be pulled out of the locking block 1302 by hand, and the wedge piece 203 can be locked again by rotating the second positioning tenon 602.

[0027] See also Figures 3 - 6 , Figure 9 , Figures 11 - 15In this embodiment, a guide flange 15 is provided in the No. 1 middle hole channel 12, and a guide keyway 16 corresponding to and matching the guide flange 15 is provided on the shaft column 1301. The guide flange 15 is slidably connected in the guide keyway 16. The guide flange 15 is used to limit the rotation of the shaft column 1301. A protective ring 17 is fixedly connected to the shaft column 1301. The protective ring 17 is an inverted frustum-shaped structure. The protective ring 17 is blocked between the No. 2 middle hole channel 1202 and the rock and soil layer. The sliding of the guide flange 15 and the guide keyway 16 is utilized. The dynamic connection limits the shaft column 1301. When the movable disk 1201 rotates, it prevents the shaft column 1301 from rotating in the No. 1 center hole channel 12 and the No. 2 center hole channel 1202 to cause the spring 1304 to twist. After the positioning tenon 602 is inserted into the rock and soil layer, the No. 2 center hole channel 1202 is in a state of being blocked and covered by the protective ring 17, and the locking groove 14 will not be blocked by soil particles in the rock and soil layer. Therefore, when the movable disk 1201 rotates, the locking block 1302 can be smoothly inserted into the locking groove 14.

[0028] See also Figures 3 - 6 , Figure 9 and Figures 12 - 15 In this embodiment, a flow channel 18 is provided on the inner wedge head 201, and a seepage channel 19 is provided on the positioning tenon 602. When the positioning tenon 602 rotates away from the I-shaped groove 701, the seepage channel 19 is connected with the flow channel 18. A circular knife 20 with an arc structure is fixedly connected to the wedge 203. The circular knife 20 is used to cut the adhesive soft bag 3. After the positioning tenon 602 rotates to be offset from the I-shaped groove 701, not only the limit on the wedge 203 is released, but also the seepage channel 19 is connected with the flow channel 18. The adhesive in 01 can be discharged outward through the flow channel 18 and the seepage channel 19, and quickly solidify with the opened wedge 203 and the rock and soil layer between the wedge 203. When the inner anchor rod 9 pushes the adhesive soft bag 3, the adhesive soft bag 3 will be squeezed on the ring cutter 20 and broken. As the inner anchor rod 9 continues to be pushed in, the inner anchor rod 9 contacts the ring cutter 20, and the force is transmitted to the wedge 203 to enter the rock and soil layer. There is a large gap between the inner anchor rod 9 and the wedge 203 due to the existence of the ring cutter 20, and the adhesive can also flow out from there to the surrounding rock and soil layers.

[0029] See also Figures 1 - 15 The present invention provides a method for using a tunnel arch anchor rod construction device, using the tunnel arch anchor rod construction device as described above, comprising the following steps: Step S1: according to the structural characteristics of the rock and soil layer in the anchor construction area, the characteristics of the adhesive composition used and the design and construction requirements, an extension part of a suitable length is set on the tail shell 1 (a fixed extension shell 801 with a fixed length can be welded to the tail shell 1, or a plurality of extension shell modules 803 can be assembled one by one), and then the adhesive soft bag 3 is filled inward, and then a hole is drilled at a preset point on the rock and soil layer with a drilling device, and then the hollow anchor and the extension part are installed and inserted into the anchor hole; Step S2: insert the wedge assembly and the second positioning tenon 602 into the rock layer at the bottom of the anchor hole, and then rotate the hollow anchor rod. Because the friction force formed by the gripping effect of the rock layer on the second positioning tenon 602 is greater than the friction between the wedge assembly, the hollow anchor rod and the rock layer, the wedge assembly and the hollow anchor rod rotate relative to the second positioning tenon 602. When the locking groove 14 on the movable disk 1201 rotates to align with the locking block 1302 on the shaft column 1301, the shaft column 1301 generates a gap that moves along the second center hole channel 1202. Under the elastic contraction of 1304, the shaft column 1301 is pulled to move, so that the locking block 1302 is stuck in the locking groove 14, so that the movable disk 1201 and the shaft column 1301 are locked, so that the movable disk 1201 cannot rotate in the No. 1 middle hole channel 12. At the same time, the positioning tenon 2 602 that rotates relative to the wedge head assembly and the hollow anchor rod leaves the I-shaped groove 701 (dislocated with the I-shaped groove 701 and the I-shaped frame 702), and the wedge piece 203 can slide out along the slide groove 202, and the through-flow channel 18 and the seepage channel 19 are in a connected state; Step S3: Then take out the inner anchor rod 9, insert it into the hollow anchor rod and push it into the extension part and the tail shell 1, push and squeeze the pre-set adhesive soft bag 3, the adhesive soft bag 3 is slightly deformed by force, and under the action of the ring knife 20 (the end is sharp, and when the inner anchor rod 9 is rotated and pushed in, the adhesive soft bag 3 can rotate relative to the ring knife 20 by virtue of the friction between the inner anchor rod 9 and the adhesive soft bag 3, thereby cutting the adhesive soft bag 3) and the breaking nail 4 (the breaking nail 4 is set at an angle of 15-30 degrees with the inner wall of the tail shell 1, and the adhesive soft bag 3 can be easily broken by being squeezed on the breaking nail 4) (the ring knife 20 and the breaking nail 4 can form multiple breaks on the adhesive soft bag 3, which is convenient for the full outflow of the adhesive), the end and side wall of the adhesive soft bag 3 are cut open, and the internal adhesive flows out; Step S4: Then, the inner anchor rod 9 continues to be jacked in. The end of the inner anchor rod 9 acts on the cutter ring 20, and a thrust is continuously applied, causing the wedge piece 203 to be pushed out along the chute 202. The wedge piece 203 is in an expanded state and further inserts into the rock and soil layer, forming a prestress with the rock and soil layer. During the process of the wedge piece 203 being pushed out, the elastic piece 1001 restricted by its extrusion gradually expands outwards. When the wedge piece 203 is pushed out in place, the bayonet 11 is aligned with the position of the catch 1002. Under the elastic expansion action of the elastic piece 1001, the catch 1002 is caught into the bayonet 11 to fix the wedge piece 203 and restrict the wedge piece 203 from sliding back and forth along the chute 202; Step S5: Rotate and pull the inner anchor rod 9 back and forth to stir the binder in the tail shell 1 and the extension part. A part of the flowing binder flows out from the overflow hole 5 and preferentially combines with the extension part, the tail shell 1 and the surrounding rock and soil layer. Another part of the binder flows out from the gap between the inner anchor rod 9 and the wedge piece 203 and preferentially combines with the inner wedge head 201 and the surrounding rock and soil layer. Still another part of the binder flows out from the through-flow channel 18 and the seepage channel 19 and preferentially combines with the wedge piece 203 and the surrounding rock and soil layer; Step S6: Remove the inner anchor rod 9. After the binder is fully cured, pump mortar or other chemical reinforcing agents into the hollow anchor rod with a pumping device. These chemical reinforcing agents fill the hollow anchor rod, the extension part and the tail shell 1, and flow out through the holes on the hollow anchor rod and the extension part and penetrate into the surrounding rock and soil layer for curing.

Claims

1. A construction device for tunnel arch frame anchor rods, comprising a tail shell (1); characterized in that: It further includes a wedge head assembly installed at one end of the tail shell (1), an extension part installed at the other end of the tail shell (1), an adhesive soft package (3) arranged in the cavity formed by the tail shell (1) and the extension part, a breaking nail (4) fixed in the tail shell (1), and a tenon on the wedge head assembly. The extension part is used to lengthen the internal space of the tail shell (1). The wedge head assembly is used to insert into the rock and soil layer of the anchor hole. The breaking nail (4) is used to break the adhesive soft package (3). The adhesive soft package (3) is used to fill the adhesive for solidifying the rock and soil layer. An overflow hole (5) is formed in the tail shell (1), and the overflow hole (5) is used for the adhesive to flow out. The tenon is used to position the tail shell (1), the extension part and the wedge head assembly on the rock and soil layer; The wedge head assembly includes an inner wedge head (201) fixedly connected to the tail shell (1), a chute (202) arranged on the inner wedge head (201), and a wedge piece (203) slidably connected to the chute (202). The wedge piece (203) slides axially along the chute (202). When the wedge piece (203) slides out of the chute (202), the wedge head assembly is in an open state; when the wedge piece (203) slides back into the chute (202), the wedge head assembly is in a retracted state; A limiting assembly is installed on the wedge head assembly. The limiting assembly is used to limit the inner wedge head (201) and the wedge piece (203). The limiting assembly includes an I-shaped groove (701) formed in the inner wedge head (201) and an I-shaped frame (702) fixedly connected to the wedge piece (203). The I-shaped frame (702) is slidably connected in the I-shaped groove (701).

2. The construction device for tunnel arch frame anchor bolts according to claim 1, characterized in that: The extension part includes a fixed extension shell (801) welded and fixed to the tail shell (1) and a number of first orifice openings (802) equidistantly formed in the fixed extension shell (801). The fixed extension shell (801) is used to lengthen the internal space of the tail shell (1). The adhesive soft package (3) is arranged in the cavity formed by the tail shell (1) and the fixed extension shell (801). The first orifice openings (802) are used for the concrete mortar to flow out therefrom.

3. The construction device for tunnel arch frame anchor rods according to claim 2, characterized in that: The extension part includes an extension shell module (803) threadedly connected to the tail shell (1) and a second orifice opening (806) formed in the extension shell module (803). One end of the extension shell module (803) is provided with a screw port (804), and the other end is provided with a screw ring (805). The screw ring (805) is threadedly connected to the tail shell (1) to fix the extension shell module (803) to the tail shell (1). A number of adjacent extension shell modules (803) are connected to each other in pairs through corresponding screw ports (804) and screw rings (805). The second orifice opening (806) is used for the concrete mortar to flow out therefrom.

4. The tunnel arch frame bolt construction device according to claim 3, characterized in that: A check component is installed on the inner wedge head (201). The check component is used to fix the wedge piece (203). The check component includes an elastic piece (1001) fixedly connected to the inner wedge head (201) and a hook (1002) fixedly connected to the elastic piece (1001). The elastic pieces (1001) are arranged in one-to-one correspondence with the wedge pieces (203). A bayonet (11) adapted to the hook (1002) is formed on the wedge piece (203). When the wedge piece (203) slides out of the chute (202), the hook (1002) snaps into the bayonet (11) to fix the wedge piece (203). When sliding back into the chute (202), the I-shaped frame (702) presses the elastic piece (1001) and the hook (1002) towards one side of the central axis of the inner wedge head (201).

5. The tunnel arch frame bolt construction device according to claim 4, characterized in that: The tenon part includes a positioning tenon one (601). The positioning tenon one (601) is welded and fixed to the inner wedge head (201), and the positioning tenon one (601) is located between the I-shaped grooves (701).

6. The construction device for tunnel arch frame anchor bolts according to claim 5, characterized in that: The tenon part includes a positioning tenon two (602), a movable disc (1201) installed on the positioning tenon two (602), and a second middle hole channel (1202) formed in the middle of the movable disc (1201). The movable disc (1201) is used to adjust the angle of the positioning tenon two (602). A first middle hole channel (12) is formed on the inner wedge head (201). The movable disc (1201) is movably connected in the first middle hole channel (12). When the positioning tenon two (602) rotates onto the I-shaped groove (701), the wedge piece (203) is limited in the chute (202). When the positioning tenon two (602) rotates away from the I-shaped groove (701), the wedge piece (203) can slide out along the chute (202).

7. The construction device for tunnel arch frame anchor bolts according to claim 6, characterized in that: A locking component is installed on the inner wedge head (201). The locking component is used to limit the movable disc (1201). The locking component includes a shaft column (1301) inserted into the cavity formed by the first middle hole channel (12) and the second middle hole channel (1202), a locking block (1302) fixedly connected to the shaft column (1301), an end disc (1303) fixedly connected to one end of the shaft column (1301), and a spring (1304) fixedly connected to the end disc (1303). A locking groove (14) is formed in the second middle hole channel (1202). The spring (1304) is fixedly connected between the end disc (1303) and the inner wedge head (201). The spring (1304) is used to pull the shaft column (1301) to axially move in the second middle hole channel (1202). When the positioning tenon two (602) rotates away from the I-shaped groove (701), the locking block (1302) snaps into the corresponding locking groove (14).

8. A tunnel arch frame bolt construction device according to claim 7, characterized in that: A guide flange (15) is provided in the No. 1 center hole channel (12), and a guide keyway (16) corresponding to and matching the guide flange (15) is provided on the shaft column (1301). The guide flange (15) is slidably connected in the guide keyway (16), and the guide flange (15) is used to limit the rotation of the shaft column (1301). A protective ring (17) is fixedly connected to the shaft column (1301), and the protective ring (17) is an inverted frustum-shaped structure. The protective ring (17) is shielded between the No. 2 center hole channel (1202) and the rock and soil layer.

9. The construction device for tunnel arch frame anchor rods according to claim 8, characterized in that: The inner wedge head (201) is provided with a flow channel (18), and the second positioning tenon (602) is provided with a seepage channel (19). When the second positioning tenon (602) rotates away from the I-shaped groove (701), the seepage channel (19) is communicated with the flow channel (18).

10. A tunnel arch frame bolt construction device according to claim 9, characterized in that: A circular knife (20) with an arc-shaped structure is fixedly connected to the wedge (203), and the circular knife (20) is used to cut open the adhesive soft bag (3).

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