CN112360534A - Full-anchor grouting anchor rod and anchoring method thereof - Google Patents
Full-anchor grouting anchor rod and anchoring method thereof Download PDFInfo
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- CN112360534A CN112360534A CN202011618677.3A CN202011618677A CN112360534A CN 112360534 A CN112360534 A CN 112360534A CN 202011618677 A CN202011618677 A CN 202011618677A CN 112360534 A CN112360534 A CN 112360534A
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- grouting
- anchor
- rod
- steel pipe
- anchoring
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- 238000004873 anchoring Methods 0.000 title claims abstract description 71
- 238000000034 method Methods 0.000 title claims abstract description 15
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 69
- 239000010959 steel Substances 0.000 claims abstract description 69
- 239000011435 rock Substances 0.000 claims abstract description 36
- 230000000670 limiting effect Effects 0.000 claims abstract description 29
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 19
- 238000005553 drilling Methods 0.000 claims abstract description 12
- 230000002441 reversible effect Effects 0.000 claims abstract description 8
- 238000007569 slipcasting Methods 0.000 claims abstract 11
- 238000007789 sealing Methods 0.000 claims description 32
- 239000011440 grout Substances 0.000 claims description 26
- 238000009434 installation Methods 0.000 claims description 10
- 239000011347 resin Substances 0.000 claims description 7
- 229920005989 resin Polymers 0.000 claims description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 238000010276 construction Methods 0.000 claims description 4
- 239000013013 elastic material Substances 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims 5
- 239000000463 material Substances 0.000 claims 1
- 239000007787 solid Substances 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 abstract 1
- 230000008093 supporting effect Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 3
- 238000005065 mining Methods 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 230000008676 import Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
- E21D20/025—Grouting with organic components, e.g. resin
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0093—Accessories
Abstract
The invention relates to a full-anchor grouting anchor rod and an anchoring method thereof, belonging to the technical field of anchor rod support. The anchor rod specifically comprises an anchoring section, a grouting section and a rod body. The rod body is provided with two limiting blocks, and the anchoring section and the grouting section are bounded by the limiting blocks. The anchoring section is used for the body of rod concretion in the drilling, the slip casting section is used for pouring the thick liquid into the drilling. The steel rod is provided with a reverse nail, an inner threaded rod is arranged in the reverse nail, and a steel pipe is arranged outside the reverse nail. When the grouting anchor is used, anchoring with the anchoring agent is firstly completed, then pre-tightening of the anchor is completed, and finally grouting is performed. The invention combines the functions of a common solid anchor rod and grouting together, and realizes full-anchoring grouting by connecting the anchoring section with the grouting section. The roadway surrounding rock can be actively supported in time, the stress state of the roadway surrounding rock is improved, the bearing capacity of the surrounding rock is fully exerted, and the stability of the roadway surrounding rock in a high-stress environment is ensured.
Description
Technical Field
The invention relates to a full-anchor grouting anchor rod and an anchoring method thereof, belonging to the technical field of anchor rod support.
Background
At present, as the mining depth of resources increases, the ground stress on the underground roadway also increases, so that the stress of certain parts of the roadway is increased, and finally the deformation and the damage of the roadway are caused. The anchor bolt support is an active support mode, is an effective measure for inhibiting the deformation of an excavated rock mass and reinforcing an unstable rock mass, and is widely applied to roadway support. The anchor bolt support is an anchor bolt anchored in a rock body, so that the stress state of surrounding rock is improved, the surrounding rock is reinforced, and the purpose of maintaining the stability of a roadway is achieved.
Because of the underground mining condition is more and more complicated, mining activity influences the disturbance of country rock in addition for tunnel country rock deflection is big, and traditional anchor bolt support technique also has some problems: firstly, the anchoring depth of the anchor rod is insufficient, and in a roadway with large damage depth, the damage depth often exceeds the anchoring depth of the anchor rod, so that the anchoring force of the anchor rod is insufficient, the supporting performance of the anchor rod is reduced, the supporting system fails, and the stability of roadway surrounding rock is seriously influenced. Secondly, the anchoring fastening performance between the anchor rod and the rock mass is poor, and after the anchor rod is installed, the drilled rock wall and the anchor rod cannot be effectively and tightly combined, so that the internal part of the rock mass is easy to crack and loosen, and the anchor rod supporting capability is poor. And the rod body of the existing hollow grouting anchor rod is of a hollow structure, so that the strength is low and the shear resistance is poor. And the anchor rod is inconvenient to slip cast and poor in effect, so that the function of the anchor rod is influenced. And some anchor rods have complex structures, complex processes and higher cost.
Therefore, the existing anchor rods have a great improvement space, and a new underground roadway bolting structure is needed to solve the above problems.
Disclosure of Invention
In order to improve the overall strength and the anchoring strength of the anchor rod, improve the grouting quality and reduce the manufacturing cost of the grouting anchor rod, the invention provides the full-anchoring grouting anchor rod and the anchoring method thereof, so as to solve the problems of low anchoring reliability, poor supporting effect, complex process and the like.
The technical scheme adopted by the invention is as follows: a full-anchor grouting anchor rod comprises a rod body 19, a limiting block 2, a steel pipe 16, an internal thread rod 17, a tray 8, a sealing gasket 9, a C-shaped gasket 10, an L-shaped grouting pipe 25, a large anchor 13 and a small anchor 12;
two limiting blocks 2 are symmetrically fixed on two outer side walls of the upper end of the rod body 19, a through hole is formed in the side wall of the upper end of the rod body 19, an inverted nail 1 is installed in the through hole in a clearance fit mode, the part, inside the rod body 19, of the inverted nail 1 is higher than the part, outside the rod body 19, of the inverted nail 1, a thread 18 is arranged in the rod body 19, an inner threaded rod 17 is screwed into the rod body 19 through the thread 18, the top of the inner threaded rod 17 is a convex body 20, a hollow steel pipe 16 is sleeved outside the rod body 19, the top end of the steel pipe 16 is exactly jacked to the limiting blocks 2 when being installed, a tray 8 is arranged at the inlet; the lower part of the tray 8 is provided with a C-shaped gasket 10, a C-shaped gasket notch 22 is arranged on the C-shaped gasket 10, a large anchor 13 and a small anchor 12 are sequentially arranged on the lower part of the C-shaped gasket 10, the outlet end of an L-shaped grouting pipe 25 sequentially penetrates through the C-shaped gasket notch 22 and the mounting hole in the tray 8 and then is communicated with the bottom of the steel pipe 16, the side wall of the steel pipe 16 is provided with a grouting hole, and the outer side of the middle grouting hole is provided with an elastic sealing bag 5.
Preferably, the convex body 20 is in the shape of a circular truncated cone.
Preferably, the stopper 2 is welded to the outer side wall of the rod body 19.
Preferably, the steel pipe 16 is an anchor rod.
Preferably, a first group of grouting holes 7, a second group of grouting holes 6 and a third group of grouting holes 3 are formed in the side wall of the steel pipe 16 from bottom to top, each group of grouting holes comprises four grouting holes, an elastic sealing bag 5 is arranged outside the second group of grouting holes 6, and the elastic sealing bag 5 is made of a high-fiber elastic material.
Preferably, the elastic sealing bag 5 is locked at both ends thereof to the outer side wall of the steel pipe 16 by the locking rings 4.
Preferably, the sealing gasket 9 is made of rubber, and the C-shaped gasket 10 is made of iron.
Preferably, an anchoring section 23 is arranged above the limiting block 2, and a grouting section 24 is arranged below the limiting block 2.
Preferably, the end surfaces of the rod body 19 and the steel pipe 16 are both circular, and four reverse nails 1 are uniformly arranged at the same height on the side wall of the rod body 19.
The anchoring method of the full-anchoring grouting anchor rod comprises the following steps:
step one, drilling and installing the rod body 19:
firstly, completing drilling according to the required construction, then directly pushing the resin anchoring agent to the bottom of the drilling hole by using the rod body 19, slightly shaking the rod body 19, screwing out the convex body 20 at the tip part of the internal thread rod 17, extending out the inverted nail 1, stopping injecting when the resin anchoring agent is uniformly injected and the anchoring agent is injected into the limiting block 2, and forming an anchoring section 23 at the moment;
step two, mounting pre-tightening devices such as steel pipes and anchors:
after the anchoring of the anchoring agent is finished, installing a steel pipe 16 into the drilled hole, enabling the top end of the steel pipe 16 to be just propped against the limiting block 2, forming an annular grouting channel 15 between the steel pipe 16 and the drilled hole at the moment, installing a sealing gasket 9 at the sealing opening at the lower end of the steel pipe 16, then installing a tray 8, communicating an L-shaped grouting pipe 25 with the steel pipe through the tray 8, fixing the L-shaped grouting pipe with a C-shaped gasket 10, pre-tightening the whole anchor rod with a large anchor 13 at the moment, and finally pre-tightening an inner threaded rod 17 with a small anchor 12;
step three, grouting:
and after the anchoring work of the anchoring agent and the installation pre-tightening work are finished, grouting is started. During grouting, an external grouting device is connected to a grouting opening 14 of an L-shaped grouting pipe 25, grout 26 flows into a steel pipe 16 through the L-shaped grouting pipe 25, the grout 26 firstly flows to a gap between the steel pipe 16 and a drill hole through a first group of grouting holes 7 and then permeates into surrounding rock cracks; then, the grout 26 enters the elastic sealing bag 5 through the second group of grouting holes 6, the elastic sealing bag 5 expands and is tightly attached to the inner wall of the drilled hole along with the increase of the grout 26, then, the rest of the grout 26 flows through the third group of grouting holes 3 and enters the vacant part below the anchoring section 23 to realize full anchoring, the grouting is stopped after the drilled hole is filled with the grout 26 and the grout 26 flows out of the grouting port 14, and finally, the grouting port 14 is blocked by a bolt.
The invention has the advantages that:
1. the invention has the advantages that the grouting function is considered, and the rod body becomes a solid rod body after the internal thread rod is arranged in the rod body, so that the anti-shearing capability of the anchor rod is stronger than that of a common anchor rod. The grouting device provided by the invention adopts the channel formed by connecting the grouting pipe and the steel pipe to directly perform grouting, and grout is injected into the drill hole and the rock wall crack from the grouting hole in the steel pipe, so that the grouting efficiency is improved.
2. The invention increases the whole length of the anchor rod by screwing out the convex body at the tip part of the inner threaded rod, and the anchoring length is increased along with the increase of the whole length of the anchor rod. After the anchoring section is anchored by using the anchoring agent, the whole anchor rod can be subjected to double pre-tightening through a large anchor tool and a small anchor tool, and grouting can be performed in a pre-tightening state. And the anchoring agent and the grout are adopted for anchoring simultaneously, so that the integration of anchor rod support and grouting is realized, the anchor rod anchoring strength is enhanced, and the support efficiency is improved.
3. According to the invention, three groups of grouting holes are arranged on the steel pipe, the grouting speed is high, and meanwhile, grouting is carried out to reinforce the in-situ surrounding rock of the roadway, so that the mechanical property of the surrounding rock is improved, and the damage depth of the surrounding rock of the roadway can be effectively controlled. The invention has simple structure and convenient installation, and is suitable for supporting complex rock mass roadway environment.
Drawings
FIG. 1 is a schematic view of a bolt construction provided by the present invention;
FIG. 2 is a top view of a steel pipe and limiting block mounting position structure provided by the invention;
FIG. 3 is a front view of the installation position structure of the steel pipe, the limiting block and the elastic sealing bag provided by the invention;
FIG. 4 is a schematic view of a reverse nail mounting structure provided by the present invention;
FIG. 5 is a schematic view of the present invention showing the protruding body at the tip of the rod body being rotated out;
fig. 6 is a schematic view of a C-shaped gasket provided by the present invention.
In the figure, 1-inverted nail, 2-limiting block, 3-third group of grouting holes, 4-locking ring, 5-elastic sealing bag, 6-second group of grouting holes, 7-first group of grouting holes, 8-tray, 9-sealing gasket, 10-C-shaped gasket, 11-hexagonal prism, 12-small anchor, 13-large anchor, 14-grouting opening, 15-grouting channel, 16-steel pipe, 17-internal thread rod, 18-thread, 19-rod body, 20-convex body, 21-roadway surrounding rock, 22-C-shaped gasket notch, 23-anchoring section, 24-grouting section, 25-L-shaped grouting pipe and 26-grout.
Detailed Description
The following detailed description of embodiments of the invention is provided in connection with the accompanying drawings.
Example 1: as shown in fig. 1-6, a full-anchor grouting anchor rod comprises a rod body 19, a limiting block 2, a steel pipe 16, an internal thread rod 17, a tray 8, a sealing gasket 9, a C-shaped gasket 10, an L-shaped grouting pipe 25, a large anchor 13 and a small anchor 12;
two stopper 2 are fixed to the symmetry on two lateral walls about the upper end in the body of rod 19, be equipped with the through-hole on the body of rod 19 upper end lateral wall, clearance fit installs down nail 1 in the through-hole, the part of falling nail 1 inside the body of rod 19 is higher than its part outside the body of rod 19, be equipped with screw thread 18 in the body of rod 19, internal thread rod 17 is screwed in to inside the body of rod 19 through screw thread 18, the top of internal thread rod 17 is convex body 20, body of rod 19 overcoat has hollow steel pipe 16, the 16 top of steel pipe just pushes up on stopper 2 when the installation, the import department of drilling is equipped with tray 8, after the body of rod 19 and 16 installation of steel pipe, with tray 8 with body of rod 19 partially. A sealing gasket 9 is arranged at the joint part of the lower part of the steel pipe 16 and the tray 8, so that slurry is prevented from leaking from a gap between the lower end of the steel pipe 16 and the tray 8 in the grouting process; the lower part of the tray 8 is provided with a C-shaped gasket 10, the C-shaped gasket 10 is provided with a C-shaped gasket notch 22, the L-shaped grouting pipe 25 is fixed through the C-shaped gasket 10, the notch 22 of the C-shaped gasket is tightly attached to the L-shaped grouting pipe 25, and then the rod body is pre-tightened by a large anchorage device 13. The lower part of the C-shaped gasket 10 is sequentially provided with a large anchor 13 and a small anchor 12, the outlet end of an L-shaped grouting pipe 25 sequentially penetrates through a C-shaped gasket notch 22 and a mounting hole in the tray 8 and then is communicated with the bottom of a steel pipe 16, a grouting hole is formed in the side wall of the steel pipe 16, an elastic sealing bag 5 is arranged on the outer side of the middle grouting hole, and an external grouting machine is connected with the L-shaped grouting pipe 25 to inject grouting into a drilled hole during grouting. And roadway surrounding rocks 21 are arranged in rock bodies on two sides of the drilled hole.
When the internal thread rod 17 is screwed into the rod body 19, the inverted nail 1 penetrates through the rod body 19 to be in contact with the convex body 20 at the tip part of the internal thread rod 17, and when the internal thread rod 17 rotates upwards, the inverted nail 1 extends towards the outside of the rod body 19 and is driven into a rock wall of a drilled hole. The reverse nailing 1 device enables the overall anchoring strength of the anchor rod to be higher, and plays a certain role in preventing anchor dropping.
When the internal thread rod 17 rotates upwards to drive the inverted nail 1 into the rock wall, the convex body 20 at the top end part of the upper part of the internal thread rod 17 also rises upwards to exceed the top end of the rod body 19, so that the anchoring length of the anchor rod can be increased, and the supporting performance is enhanced.
The limiting block 2 is used for fixing the position of the steel pipe 16, and when grouting is performed in a drill hole, grout 26 flows in through a gap between the steel pipe 16 and the rod body 19 and enters the drill hole and the rock body crack through a grouting hole. The steel pipe 16 is a hollow steel pipe with holes, made of steel, and the steel pipe at the upper part contacting with the limiting block 2 is also hollow, as shown in fig. 2.
Further, the convex body 20 has a circular truncated cone shape.
Further, the limiting block 2 is welded on the outer side wall of the rod body 19.
Further, the steel pipe 16 is an anchor rod.
Furthermore, a first group of grouting holes 7, a second group of grouting holes 6 and a third group of grouting holes 3 are formed in the side wall of the steel pipe 16 from bottom to top, each group of grouting holes comprises four grouting holes, and an elastic sealing bag 5 is arranged outside each second group of grouting holes 6. The elastic sealing bag 5 is made of high-fiber elastic material and cannot penetrate through slurry.
Further, the elastic sealing bag 5 is locked at both ends thereof to the outer side wall of the steel pipe 16 by the locking rings 4 to prevent the slurry from leaking out.
Further, the sealing gasket 9 is made of rubber, and the C-shaped gasket 10 is made of iron.
Further, an anchoring section 23 is arranged above the limiting block 2, and a grouting section 24 is arranged below the limiting block 2. The tail part of the anchoring section 23 and the head part of the grouting section 24 use the limiting block 2 as a boundary, wherein the anchoring section 23 is fixedly connected with the bottom of the drill hole and surrounding rocks around by using an anchoring agent, and the grouting section 24 is used for grouting into the drill hole and surrounding rock cracks.
Furthermore, the end surfaces of the rod body 19 and the steel pipe 16 are both circular, and four reverse nails 1 are uniformly arranged at the same height on the side wall of the rod body 19.
Further, after the large anchorage device 13 is used for pre-tightening the rod body, the internal thread rod 17 can be screwed out through the hexagonal prism 11, and when the internal thread rod 17 is screwed out to a proper position, the internal thread rod 17 is pre-tightened through the small anchorage device 12. The large anchorage device 13 and the small anchorage device 12 are simultaneously pre-tightened, so that the overall pre-tightening force of the anchor rod can be increased.
The anchoring method of the full-anchoring grouting anchor rod comprises the following steps:
step one, drilling and installing the rod body 19:
firstly, completing drilling according to the required construction, then directly pushing the resin anchoring agent to the bottom of the drilling hole by using the rod body 19, slightly shaking the rod body 19, screwing out the convex body 20 at the tip part of the internal thread rod 17, extending out the inverted nail 1, stopping injecting when the resin anchoring agent is uniformly injected and the anchoring agent is injected into the limiting block 2, and forming an anchoring section 23 at the moment;
step two, mounting pre-tightening devices such as steel pipes and anchors:
after the anchoring of the anchoring agent is finished, installing a steel pipe 16 into the drill hole to ensure that the top end of the steel pipe 16 just props against the limiting block 2, forming an annular grouting channel 15 between the steel pipe 16 and the drill hole, installing a sealing gasket 9 at the sealed end of the lower end of the steel pipe 16, then installing a tray 8, arranging a round hole with the same diameter as that of an L-shaped grouting pipe 25 on the tray 8, penetrating the L-shaped grouting pipe 25 through the tray 18 to be connected with the steel pipe 16 during installation, fixing the L-shaped grouting pipe 25 by using a C-shaped gasket 10, then pre-tightening the whole rod body by using a large anchor 13, and fixing the C-shaped gasket 10 at the moment. Finally, the internally threaded rod 17 is pre-tensioned by means of a small anchor 12. And the whole installation and pre-tightening of the anchor rod are finished.
Step three, grouting:
and after the anchoring work of the anchoring agent and the installation pre-tightening work are finished, grouting is started. During grouting, an external grouting device is connected to a grouting opening 14 of an L-shaped grouting pipe 25, grout 26 flows into a steel pipe 16 through the L-shaped grouting pipe 25, the grout 26 flows to a gap between the steel pipe 16 and a drill hole through a first group of grouting holes 7, and then penetrates into surrounding rock cracks; then, the grout 26 enters the elastic sealing bag 5 through the second group of grouting holes 6, the elastic sealing bag 5 expands and is tightly attached to the inner wall of the drill hole along with the increase of the grout 26, the fastening degree of the anchor rod and the drill hole can be enhanced, and simultaneously, the water plugging effect is achieved, and then the rest 26 flows through the third group of grouting holes 3 and enters the vacant part below the anchoring section 23 to achieve full anchoring. Stopping grouting after the drill hole is filled with the grout 26 and the grout 26 flows out of the grouting opening 14, and finally plugging the grouting opening 14 by using a bolt. The grout 26 is a cement grout in this application.
The invention has the advantages of combining the high strength and the grouting function of the anchor rod, perfectly combining the solid rod body formed by mounting the inner threaded rod 17 in the rod body 19 in a sleeved mode and the grouting function, along with simple and convenient installation and simple process, completing the grouting reinforcement of the surrounding rock of the roadway while anchoring and grouting, and being capable of actively supporting the surrounding rock of the roadway in time and improving the stress state of the surrounding rock of the roadway. The full anchoring of the anchor rod is realized through resin anchoring and cement grouting, the supporting strength of the anchor rod is obviously improved, the deformation process and the damage range of the surrounding rock of the roadway are effectively controlled, and the bearing capacity of the surrounding rock is fully exerted.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, and the technical solutions and the inventive concepts thereof are equally replaced or changed and modified within the spirit and principle of the present invention to be covered within the scope of the present invention.
Claims (10)
1. The utility model provides a full anchor slip casting stock which characterized in that: comprises a rod body (19), a limiting block (2), a steel pipe (16), an internal thread rod (17), a tray (8), a sealing gasket (9), a C-shaped gasket (10), an L-shaped grouting pipe (25), a large anchor (13) and a small anchor (12);
two limiting blocks (2) are symmetrically fixed on two outer side walls of the middle upper end of the rod body (19), a through hole is formed in the side wall of the upper end of the rod body (19), an inverted nail (1) is installed in the through hole in a clearance fit mode, the part, inside the rod body (19), of the inverted nail (1) is higher than the part, outside the rod body (19), of the inverted nail (1), a thread (18) is arranged in the rod body (19), an internal thread rod (17) is screwed into the rod body (19) through the thread (18), a convex body (20) is arranged at the top of the internal thread rod (17), a hollow steel pipe (16) is sleeved outside the rod body (19), the top end of the steel pipe (16) is exactly jacked onto the limiting blocks (2) when the steel pipe is installed, a tray (8) is arranged at; tray (8) lower part is equipped with C shape packing ring (10), be equipped with C shape packing ring breach (22) on C shape packing ring (10), C shape packing ring (10) lower part is equipped with big ground tackle (13) and little anchor (12) in proper order, the exit end of L shape slip casting pipe (25) passes C shape packing ring breach (22) in proper order, behind the mounting hole on tray (8) and the bottom intercommunication of steel pipe (16), be equipped with the slip casting hole on the lateral wall of steel pipe (16), the outside in middle part slip casting hole is equipped with elastic sealing bag (5).
2. A full anchor grouting bolt as claimed in claim 1, wherein: the convex body (20) is in a circular truncated cone shape.
3. A full anchor grouting bolt as claimed in claim 1, wherein: the limiting block (2) is welded on the outer side wall of the rod body (19).
4. A full anchor grouting bolt as claimed in claim 1, wherein: the steel pipe (16) is an anchor rod.
5. A full anchor grouting bolt as claimed in claim 1, wherein: be equipped with first group's slip casting hole (7), second group slip casting hole (6), third group slip casting hole (3) on the lateral wall of steel pipe (16) from bottom to top, every group slip casting hole includes four slip casting holes, and the outside of second group slip casting hole (6) is equipped with elastic sealing bag (5), and the material of elastic sealing bag (5) is high fibre elastic material.
6. A full anchor grouting bolt according to claim 1 or 5, characterized in that: and two ends of the elastic sealing bag (5) are locked on the outer side wall of the steel pipe (16) by locking rings (4).
7. A full anchor grouting bolt as claimed in claim 1, wherein: the sealing gasket (9) is made of rubber, and the C-shaped gasket (10) is made of iron.
8. A full anchor grouting bolt as claimed in claim 1, wherein: the anchor section (23) is arranged above the limiting block (2), and the grouting section (24) is arranged below the limiting block (2).
9. A full anchor grouting bolt as claimed in claim 1, wherein: the end faces of the rod body (19) and the steel pipe (16) are circular, and four reverse nails (1) are uniformly arranged at the same height on the side wall of the rod body (19).
10. A method of anchoring a full anchor grouted bolt according to any one of claims 1 to 9, wherein: the method comprises the following steps:
step one, drilling and installing a rod body (19):
firstly, completing drilling according to the required construction, then directly pushing the resin anchoring agent to the bottom of the drilling hole by using the rod body (19), slightly shaking the rod body (19), screwing out the convex body (20) at the tip part of the inner threaded rod (17), extending out the inverted nail (1), stopping injecting when the resin anchoring agent is uniformly injected and the anchoring agent is injected into the limiting block (2), and forming an anchoring section (23);
step two, mounting pre-tightening devices such as steel pipes and anchors:
after the anchoring of the anchoring agent is finished, installing a steel pipe (16) in the drill hole, enabling the top end of the steel pipe (16) to be just propped against the limiting block (2), forming an annular grouting channel (15) between the steel pipe (16) and the drill hole, installing a sealing gasket (9) at the sealed position of the lower end of the steel pipe (16), then installing a tray (8), communicating an L-shaped grouting pipe (25) with the steel pipe through the tray (8), fixing the L-shaped grouting pipe by using a C-shaped gasket (10), pre-tightening the integral anchor rod by using a large anchor (13), and finally pre-tightening an internal thread rod (17) by using a small anchor (12);
step three, grouting:
after anchoring of the anchoring agent and installation and pre-tightening work are finished, grouting is started, when grouting is conducted, an external grouting device is connected to a grouting opening (14) of an L-shaped grouting pipe (25), grout (26) flows into a steel pipe (16) through the L-shaped grouting pipe (25), the grout (26) flows to a gap between the steel pipe (16) and a drill hole through a first group of grouting holes (7), and then penetrates into surrounding rock cracks; then, the grout (26) enters the elastic sealing bag (5) through the second group of grouting holes (6), the elastic sealing bag (5) expands and is tightly attached to the inner wall of the drilled hole along with the increase of the grout (26), then the rest grout (26) flows through the third group of grouting holes (3) and enters the vacant part below the anchoring section (23) to realize full anchoring, the grouting is stopped after the drilled hole is filled with the grout (26) and the grout (26) flows out of the grouting opening (14), and finally the grouting opening (14) is blocked by a bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011618677.3A CN112360534A (en) | 2020-12-31 | 2020-12-31 | Full-anchor grouting anchor rod and anchoring method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011618677.3A CN112360534A (en) | 2020-12-31 | 2020-12-31 | Full-anchor grouting anchor rod and anchoring method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112360534A true CN112360534A (en) | 2021-02-12 |
Family
ID=74534741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011618677.3A Withdrawn CN112360534A (en) | 2020-12-31 | 2020-12-31 | Full-anchor grouting anchor rod and anchoring method thereof |
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| Country | Link |
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| CN (1) | CN112360534A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116398206A (en) * | 2023-06-01 | 2023-07-07 | 中国矿业大学(北京) | Roadway surrounding rock anchoring and surrounding rock internal key area pressure relief coupling control system and method |
-
2020
- 2020-12-31 CN CN202011618677.3A patent/CN112360534A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116398206A (en) * | 2023-06-01 | 2023-07-07 | 中国矿业大学(北京) | Roadway surrounding rock anchoring and surrounding rock internal key area pressure relief coupling control system and method |
| CN116398206B (en) * | 2023-06-01 | 2023-08-25 | 中国矿业大学(北京) | Roadway surrounding rock anchoring and surrounding rock internal key area pressure relief coupling control system and method |
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Application publication date: 20210212 |