CN116988825B - Resistance-increasing large-deformation grouting anchor rod and application method - Google Patents
Resistance-increasing large-deformation grouting anchor rod and application method Download PDFInfo
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- CN116988825B CN116988825B CN202311234454.0A CN202311234454A CN116988825B CN 116988825 B CN116988825 B CN 116988825B CN 202311234454 A CN202311234454 A CN 202311234454A CN 116988825 B CN116988825 B CN 116988825B
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- grouting
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- rod body
- yielding
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000011435 rock Substances 0.000 claims abstract description 68
- 239000002002 slurry Substances 0.000 claims abstract description 39
- 229910000831 Steel Inorganic materials 0.000 claims description 24
- 239000010959 steel Substances 0.000 claims description 24
- 238000004873 anchoring Methods 0.000 claims description 11
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- 238000005553 drilling Methods 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 238000010276 construction Methods 0.000 abstract description 13
- 230000002787 reinforcement Effects 0.000 abstract description 11
- 230000008569 process Effects 0.000 abstract description 10
- 230000009471 action Effects 0.000 abstract description 7
- 239000011440 grout Substances 0.000 description 11
- 230000000694 effects Effects 0.000 description 5
- 241001391944 Commicarpus scandens Species 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000000518 rheometry Methods 0.000 description 1
Classifications
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- 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
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- 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
-
- 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
- E21D21/008—Anchoring or tensioning means
-
- 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
- E21D21/0086—Bearing plates
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/23—Dune restoration or creation; Cliff stabilisation
Abstract
The invention belongs to the field of surrounding rock grouting reinforcement, and particularly discloses a resistance-increasing large-deformation grouting anchor rod and an application method thereof, wherein the resistance-increasing large-deformation grouting anchor rod comprises a sawtooth grouting sleeve, a resistance-increasing hollow grouting rod body, a resistance-increasing yielding tray, a self-advancing grouting plug, a conical bolt and a non-return plug; the sawtooth grouting sleeve is arranged at the head of the resistance-increasing hollow grouting rod body, the interior of the resistance-increasing hollow grouting rod body is hollow and used for conveying slurry, and slurry outlets for conveying the slurry to rock mass cracks are distributed on the surface of the resistance-increasing hollow grouting rod body; the resistance-increasing yielding tray comprises a tray and a yielding sleeve head which are coaxially arranged; the taper bolt is sleeved at the tail part of the resistance-increasing hollow grouting rod body; the non-return stopper is arranged at the grouting opening of the resistance-increasing hollow grouting rod body. The self-feeding grouting plug can automatically enter a rock body under the action of the conical bolt, so that the problem of complicated construction process of the traditional grouting anchor rod is solved, the construction speed of grouting reinforcement of broken surrounding rocks is increased, and the grouting reinforcement efficiency of the broken surrounding rocks is improved.
Description
Technical Field
The invention relates to the field of grouting reinforcement of surrounding rocks, in particular to a resistance-increasing large-deformation grouting anchor rod and an application method thereof.
Background
As shallow coal resources are depleted, coal mining progresses to deep. Under the action of factors such as high stress, low strength, strong disturbance and the like of surrounding rocks, the deep soft rock engineering is extremely easy to generate large deformation instability damage to the soft surrounding rocks, the proportion of a roadway of the broken soft surrounding rocks is suddenly increased under the condition of high stress, and the large deformation disaster of the soft rocks occurs, so that the deep soft rock engineering is generally characterized by high stress, large deformation, strong rheology, low strength, difficult support and the like. A large number of researches show that grouting reinforcement can fill closed rock mass cracks, and the integrity and the overall strength of the rock mass are improved through cementing, so that surrounding rock conditions are obviously improved, and the grouting reinforcement is an effective means for reinforcing deep soft rock engineering.
The existing problems are that the traditional grouting anchor rod cable has low elongation and is easy to break; the grouting time is determined to need special monitoring, so that the work is complicated and the monitoring is incomplete; the large deformation anchor rod needs to be constructed firstly, then grouting is carried out, and the process is complicated; the slurry is easy to stir unevenly during grouting, and the slurry flows back, so that slurry stones are not tightly combined, and the grouting effect is not obvious. Aiming at the difficult problem of large deformation support of soft rock, the research and development of the resistance-increasing large deformation grouting anchor rod with high strength, high elongation and resistance-increasing and energy-absorbing characteristics is an important foundation for ensuring the safe and reliable grouting effect; the grouting anchor rod is improved in the aspects of main structure and construction method, and the grouting anchor rod with the functions of preventing slurry from flowing back, simply and rapidly installing a reverse plug and increasing resistance and deformation and the application method are required to be developed, so that grouting reinforcement effect of broken surrounding rocks is improved, and grouting reinforcement construction speed of the broken surrounding rocks is increased.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to provide the resistance-increasing large-deformation grouting anchor rod with high strength, high elongation, resistance-increasing energy-absorbing characteristics and the anchor grouting construction method capable of preventing slurry from flowing back and simply and rapidly installing the non-return plug.
In a first aspect, the invention provides a resistance-increasing large-deformation grouting anchor rod, which comprises a sawtooth grouting sleeve, a resistance-increasing hollow grouting rod body, a resistance-increasing yielding tray, a self-advancing grouting plug, a conical bolt and a non-return plug;
the sawtooth grouting sleeve is arranged at the head of the resistance-increasing hollow grouting rod body and is used for stirring the slurry of the anchoring agent and preventing the anchoring agent from entering the resistance-increasing hollow grouting rod body to block a grouting hole;
the material of the resistance-increasing hollow grouting rod body is a high-strength anchor rod, the interior of the resistance-increasing hollow grouting rod body is hollow and used for conveying grout, and grout outlet holes for conveying the grout to rock mass cracks are distributed on the surface of the resistance-increasing hollow grouting rod body;
the resistance-increasing yielding tray comprises a tray and a yielding sleeve head which are coaxially arranged, a cylindrical through hole is formed in the center of the tray, the outer ring of the yielding sleeve head is cylindrical, and the inner ring of the yielding sleeve head is a conical through hole;
the taper bolt is sleeved at the tail part of the resistance-increasing hollow grouting rod body;
the non-return plug is arranged at the grouting opening of the resistance-increasing hollow grouting rod body.
In the invention, in the process that the taper bolt is pulled into the yielding sleeve head, the self-advancing type slurry stop plug is pushed into the rock mass, the wall thickness of the yielding sleeve head is gradually increased from the head to the tail, and in the process that the taper bolt is pulled into the yielding sleeve head, the resistance is increased more and more, so that the resistance is increased.
As a further technical scheme, the minimum diameter of the conical through hole is smaller than that of the cylindrical through hole, so that a step shape is formed between the cylindrical through hole and the conical through hole, and the purpose of the design is mainly to position the self-advancing type slurry stop plug through the step.
As a further technical scheme, an inner resistance increasing stripe I is arranged on the inner wall of the conical through hole, and resistance increasing is formed between the inner resistance increasing stripe I and an inner resistance increasing stripe II of the conical bolt.
As a further technical scheme, the tray and the yielding sleeve head are integrally formed.
As a further technical scheme, triangular saw teeth are distributed outside the saw tooth grouting sleeve, threads corresponding to the resistance-increasing hollow grouting rod body are arranged inside the saw tooth grouting sleeve, and the saw tooth grouting sleeve can be tightly nested at the head of the resistance-increasing hollow grouting rod body.
As a further technical scheme, the non-return plug comprises a steel sleeve, a steel ball and a spring, wherein the steel ball and the spring are arranged in the steel sleeve, the steel ball is arranged on the grouting side, the spring is arranged on the other side, the steel ball compresses the spring under the action of slurry pressure during grouting, slurry enters the resistance-increasing hollow grouting rod body through a side seam of the steel sleeve, and after grouting, the steel ball seals a grouting opening under the action of the spring to play a role in preventing slurry from flowing back.
As a further technical scheme, the conical bolt comprises a cylindrical part and a conical part, wherein the inner ring of the cylindrical part is a light hole; the inner ring of the cone part is provided with an inner resistance increasing stripe II, and the outer ring of the cone part is provided with an outer resistance increasing stripe.
As a further technical solution, the smallest diameter of the conical through hole is larger than the diameter of the conical bolt cylindrical portion.
As a further technical scheme, the diameter of the self-advancing type slurry stop plug is larger than that of the drilling hole.
The specific working process is as follows:
when the resistance-increasing hollow grouting rod body enters a rock mass, the rock mass is deformed, the rock mass expands outwards along with the deformation increase of the rock mass, the rock mass outwards extrudes the resistance-increasing yielding tray, the taper bolt is pulled into the resistance-increasing yielding tray, and the self-advancing type grouting plug is pushed into the rock mass; the resistance-increasing pressure-yielding tray consists of a tray and a pressure-yielding sleeve head, the pressure-yielding sleeve head can be customized, the wall thickness of the pressure-yielding sleeve head is gradually increased from the head to the tail, and the larger the thickness is, the larger the deformation resistance of the taper bolt pulled into the pressure-yielding sleeve head is, so that the resistance increase is realized; the self-feeding type grouting stop plug has a certain elasticity, can tightly surround the resistance-increasing hollow grouting rod body, is attached to an external rock mass, and prevents slurry leakage.
In a second aspect, the application method of the grouting anchor rod with increased resistance and large deformation comprises the steps of firstly installing the sawtooth grouting sleeve at the head of the grouting hollow rod body with increased resistance, sequentially installing the self-feeding grouting stop plug, the resistance increasing yielding tray and the conical bolt at the tail of the grouting hollow rod body with increased resistance, drilling holes on rock mass to be grouting through an anchor rod machine, and inserting the assembled grouting hollow rod body with increased resistance into the rock mass; along with the deformation increase of the rock mass, the rock mass expands outwards, the rock mass extrudes the resistance-increasing yielding tray outwards, the taper bolt is pulled into the resistance-increasing yielding tray, the self-advancing type grouting plug is pushed into the rock mass, and when the taper bolt is completely pulled into the yielding sleeve head on the resistance-increasing yielding tray, grouting is carried out by adopting a grouting pump.
The beneficial effects of the embodiment of the invention are as follows:
the resistance-increasing hollow grouting rod body has the characteristics of high strength, high elongation, resistance increase and energy absorption, is not easy to break in the stress process, and can effectively solve the problems of low elongation, easy breaking, lack of resistance increase and energy absorption characteristics and the like of the traditional grouting anchor rod rope; triangular saw teeth are distributed outside the saw tooth grouting sleeve, so that the slurry outflow during grouting can be prevented, and the anchoring agent can be uniformly stirred, so that the connection between the resistance-increasing hollow grouting rod body and the rock mass is stable; the conical bolt consists of the cylindrical part and the conical part, when the conical bolt is pulled into the yielding sleeve head, the cylindrical part can push the self-advancing slurry stop plug into a rock mass, when the conical bolt is pulled into the yielding sleeve head, the resistance is larger and larger, the resistance is increased, and the conical bolt can be customized and applicable to different engineering profiles; the reverse stop plug can effectively avoid the problem that the slurry is easy to flow back when the traditional grouting anchor rod is used for grouting, and improves the grouting reinforcement effect of broken surrounding rocks; the resistance-increasing pressure-yielding tray consists of the tray and the pressure-yielding sleeve head, the wall thickness of the pressure-yielding sleeve head is gradually increased from the head to the tail, when the conical bolt is pulled into the pressure-yielding sleeve head, the resistance is gradually increased, the resistance increase is realized, the pressure-yielding sleeve head can be customized and applicable to different engineering profiles, the tray and the pressure-yielding sleeve head are integrated, and the installation is simple; the self-advancing grouting plug can automatically enter a rock body under the action of the conical bolt, so that the process that the traditional grouting plug needs to be independently installed is simplified, the installation is simple and convenient during construction, the problem that the construction process of the traditional grouting anchor rod is complicated is avoided, the grouting reinforcement construction speed of broken surrounding rocks is increased, and the grouting reinforcement efficiency of the broken surrounding rocks is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.
FIG. 1 is a schematic view of a resistance-increasing large-deformation grouting anchor rod which is put into a rock mass;
FIG. 2 is a schematic illustration of the present invention when the taper bolt is fully pulled into the swage sleeve head;
FIG. 3 is a schematic diagram of the grouting anchor rod with increased resistance and deformation;
FIG. 4 is a schematic diagram of a resistance-increasing yielding tray according to the present invention;
FIG. 5 is a schematic view of a construction of a taper bolt according to the present invention;
fig. 6 is a schematic view of the structure of the inverted plug according to the present invention.
In the figure: 1. the self-feeding grouting device comprises a sawtooth grouting sleeve, a resistance-increasing hollow grouting rod body, a resistance-increasing yielding tray, a 3-1 tray, a 3-2 yielding sleeve head, a 4 self-feeding grouting plug, a 5 conical bolt, a 5-1 cylindrical part, a 5-2 conical part, a 6 non-return plug, a 6-1 steel sleeve, a 6-2 steel ball and a 6-3 spring.
Detailed Description
It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present invention. As used herein, the singular forms also are intended to include the plural forms unless the present invention clearly dictates otherwise, and furthermore, it should be understood that when the terms "comprise" and/or "include" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;
for convenience of description, the words "left" and "right" in the present invention, if they mean only that the directions of the words are identical to the left and right directions of the drawings, and are not to be construed as limiting the structure, but merely for convenience of description and simplification of the description, rather than indicating or implying that the apparatus or element to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus the limitation of the present invention is not to be construed.
As described in the background art, the invention provides a resistance-increasing large-deformation grouting anchor rod for solving the technical problems.
In a typical embodiment of the invention, as shown in fig. 1, 2 and 3, the resistance-increasing and deformation grouting anchor rod of the invention comprises a sawtooth grouting sleeve 1, a resistance-increasing hollow grouting rod body 2, a resistance-increasing yielding tray 3, a self-advancing grouting plug 4, a conical bolt 5 and a reverse plug 6;
the sawtooth grouting sleeve 1 is arranged at the head of the resistance-increasing hollow grouting rod body 2 and is used for stirring the slurry of the anchoring agent and preventing the anchoring agent from entering the resistance-increasing hollow grouting rod body 2 to block a slurry outlet hole so as to cause the slurry to flow outwards;
the inside of the resistance-increasing hollow grouting rod body 2 is hollow for transferring slurry, and slurry outlets for transferring the slurry to rock mass cracks are distributed on the surface of the resistance-increasing hollow grouting rod body 2;
the resistance-increasing yielding tray 3 comprises an integrally formed tray 3-1 and a yielding sleeve head 3-2, and the tray 3-1 and the yielding sleeve head 3-2 are coaxially arranged; the center of the tray 3-1 is provided with a cylindrical through hole, the outer ring of the pressure sleeve head 3-2 is cylindrical, and the inner ring is a conical through hole.
The taper bolt 5 is sleeved at the tail part of the resistance-increasing hollow grouting rod body 2; in the process that the taper bolt 5 is pulled into the yielding sleeve head 3-2, the self-advancing type grout stop plug 4 is pushed into the rock mass, and the wall thickness of the yielding sleeve head 3-2 gradually decreases from the head to the tail, so that the resistance born by the taper bolt 5 in the process of being pulled into the yielding sleeve head 3-2 is larger and larger, and the resistance is increased; the strength value of the taper bolt 5 in the present invention is not particularly required as long as the anchoring requirement under the actual construction condition is satisfied.
The non-return plug 6 is arranged at the grouting port of the resistance-increasing hollow grouting rod body 2.
Further, triangular saw teeth are distributed on the outer portion of the saw tooth grouting sleeve 1, threads matched with the resistance-increasing hollow grouting rod body 2 are arranged in the saw tooth grouting sleeve 1, the saw tooth grouting sleeve 1 can be tightly nested at the head of the resistance-increasing hollow grouting rod body 2 and used for stirring anchoring agent slurry and preventing the anchoring agent from entering the resistance-increasing hollow grouting rod body 2 to block a slurry outlet, so that slurry flows outwards.
Furthermore, the material of the resistance-increasing hollow grouting rod body 2 is a high-strength anchor rod, and the strength value of the high-strength anchor rod has no special requirement, so long as the anchoring requirement under the actual construction condition is met; the high-strength anchor rod is hollow and used for transmitting slurry; and grout outlet holes are distributed on the surface of the high-strength anchor rod, and the grout outlet holes are connected with the inner hollow pipe to transport the inner grout to rock mass cracks.
Further, as shown in fig. 5, the taper bolt 5 is composed of a cylindrical portion 5-1 and a conical portion 5-2, wherein the cylindrical portion 5-1 is internally provided with a cavity structure and can be sleeved on the resistance-increasing hollow grouting rod body 2, when the resistance-increasing hollow grouting rod body 2 enters a rock body, the rock body deforms, and the rock body expands outwards along with the deformation increase of the rock body, the rock body presses the resistance-increasing yielding tray 3 outwards, the taper bolt 5 is pulled into the resistance-increasing yielding tray 3, and the self-advancing type grouting plug 4 is pushed into the rock body; the inner ring of the cone part 5-2 is provided with an inner resistance increasing stripe II, the outer ring is provided with an outer resistance increasing stripe II, the inner resistance increasing stripe II of the inner ring does not correspond to the resistance increasing hollow grouting rod body 2, only for increasing resistance, the outer resistance increasing stripe of the outer ring does not match with the inner resistance increasing stripe I on the pressure-yielding sleeve head 3-2 of the resistance increasing pressure-yielding tray 3, and only plays a role in increasing resistance.
Further, as shown in fig. 4, the resistance-increasing and pressure-letting tray 3 includes an integrally formed tray 3-1 and a pressure-letting sleeve head 3-2, the pressure-letting sleeve head 3-2 is located at the center of the tray 3-1, the tray 3-1 includes a body, a through hole is formed in the center of the body, a cylindrical portion is formed by extending outwards along the circumferential direction and the axial direction of the hole, an outer ring of the pressure-letting sleeve head 3-2 is cylindrical, an inner ring is a conical through hole, and an inner resistance-increasing stripe I is arranged on the inner wall of the conical through hole; when the resistance-increasing yielding tray 3 is just installed, as shown in fig. 1, a through hole in the center of the tray 3-1 is matched with a self-advancing grouting plug 4 sleeved at the tail part of a resistance-increasing hollow grouting rod body 2, and a yielding sleeve head 3-2 is matched with a conical bolt 5 sleeved at the tail part of the resistance-increasing hollow grouting rod body 2; when the rock mass expands outwards, the rock mass extrudes the resistance-increasing yielding tray 3 outwards, the taper bolt 5 is pulled into the resistance-increasing yielding tray 3, the self-advancing type grout stop plug 4 is pushed into the rock mass, at the moment, the through hole of the tray 3-1 is matched with the cylindrical part of the taper bolt 5, and the conical through hole of the yielding sleeve head 3-2 is matched with the conical part of the taper bolt 5.
Furthermore, the yielding sleeve head 3-2 can be customized, the wall thickness of the yielding sleeve head 3-2 gradually increases from the head to the tail, and the larger the thickness is, the larger the deformation resistance of the tapered bolt 5 pulled into the yielding sleeve head is, so that the resistance increase is realized; it should be further noted that the term "head-to-tail" is defined in the present invention along the direction in which the taper bolt 5 is pulled in, and the wall thickness of the swage head 3-2 is gradually increased from right to left according to the orientation shown in fig. 1.
Furthermore, the self-feeding type grouting stop 4 has certain elasticity and can tightly surround the resistance-increasing hollow grouting rod body 2, and is attached to an external rock body to prevent slurry leakage.
Further, the minimum diameter of the conical through hole of the yielding sleeve head 3-2 is slightly larger than the diameter of the cylindrical part of the conical bolt 5, and the value of 'slightly larger' is that the minimum diameter of the conical through hole of the yielding sleeve head 3-2 is 1-2mm larger than the diameter of the cylindrical part of the conical bolt 5.
Further, the diameter of the self-advancing type grout stop 4 is slightly larger than the diameter of the drilling hole, and the value of 'slightly larger' can be that the diameter of the self-advancing type grout stop 4 is slightly larger than 1-2mm of the diameter of the drilling hole, so that the purpose of the design is mainly to enhance the plugging effect.
Further, the non-return plug 6 is composed of a steel sleeve 6-1, a steel ball 6-2 and a spring 6-3, wherein the steel ball 6-2 and the spring 6-3 are arranged in the steel sleeve 6-1, the steel ball 6-2 is arranged on the grouting side, the spring 6-3 is arranged on the other side, the steel ball 6-2 compresses the spring 6-3 under the action of slurry pressure during grouting, slurry enters the resistance-increasing hollow grouting rod body 2 through a sleeve side seam, and after grouting is finished, the steel ball 6-2 seals a grouting opening under the action of the spring 6-3 to play a role in preventing slurry from flowing back.
Aiming at the resistance-increasing large-deformation grouting anchor rod, the concrete construction method comprises the following steps:
during construction, firstly, the sawtooth grouting sleeve 1 is arranged at the head part of the resistance-increasing hollow grouting rod body 2, the self-advancing grouting stop 4, the resistance-increasing yielding tray 3 and the conical bolt 5 are sequentially arranged at the tail part of the resistance-increasing hollow grouting rod body 2, a rock mass to be grouting is drilled through a roof bolter, and the assembled resistance-increasing hollow grouting rod body 2 is inserted into the rock mass; along with the deformation increase of the rock mass, the rock mass expands outwards, the rock mass outwards extrudes the resistance-increasing and pressure-yielding tray 3, the taper bolt 5 is pulled into the resistance-increasing and pressure-yielding tray 3, the self-advancing type grout stop plug 4 is pushed into the rock mass, and when the taper bolt 5 is completely pulled into the pressure-yielding sleeve head 3-2 on the resistance-increasing and pressure-yielding tray 3, grouting is carried out by adopting a grouting pump.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The resistance-increasing large-deformation grouting anchor rod is characterized by comprising a sawtooth grouting sleeve, a resistance-increasing hollow grouting rod body, a resistance-increasing yielding tray, a self-advancing grouting plug, a conical bolt and a reverse grouting plug; the sawtooth grouting sleeve is arranged at the head of the resistance-increasing hollow grouting rod body and is used for stirring the slurry of the anchoring agent and preventing the anchoring agent from entering the resistance-increasing hollow grouting rod body to block a grouting hole; the inside of the resistance-increasing hollow grouting rod body is hollow and used for conveying slurry, and slurry outlet holes for conveying the slurry to rock mass cracks are distributed on the surface of the resistance-increasing hollow grouting rod body; the resistance-increasing yielding tray comprises a tray and a yielding sleeve head which are coaxially arranged, a cylindrical through hole is formed in the center of the tray, the outer ring of the yielding sleeve head is cylindrical, and the inner ring of the yielding sleeve head is a conical through hole; the self-feeding type grouting stop plug has a certain elasticity, can tightly surround the resistance-increasing hollow grouting rod body, is attached to an external rock mass, and prevents slurry leakage; the diameter of the self-advancing type slurry stop plug is larger than that of the drilling hole; the tail part of the resistance-increasing hollow grouting rod body is sequentially provided with the self-feeding type grouting stop plug, the resistance-increasing yielding tray and the conical bolt; the taper bolt is sleeved at the tail part of the resistance-increasing hollow grouting rod body; the non-return plug is arranged at the grouting opening of the resistance-increasing hollow grouting rod body.
2. The resistance-increasing and deformation-increasing grouting anchor according to claim 1, wherein the smallest diameter of the conical through hole is smaller than the diameter of the cylindrical through hole, so that a stepped shape is formed between the cylindrical through hole and the conical through hole.
3. The resistance-increasing deformation grouting anchor rod as claimed in claim 1, wherein an inner resistance-increasing stripe I is arranged on the inner wall of the conical through hole.
4. The resistance-increasing deformation grouting anchor of claim 1, wherein the tray and the yielding sleeve head are integrally formed.
5. The resistance-increasing large-deformation grouting anchor rod according to claim 1, wherein triangular saw teeth are distributed on the outer portion of the saw tooth grouting sleeve, and threads matched with the resistance-increasing hollow grouting anchor rod body are arranged on the inner portion of the saw tooth grouting sleeve.
6. The grouting anchor rod with the resistance increasing and large deformation according to claim 1, wherein the check plug consists of a steel sleeve, a steel ball and a spring, wherein the steel ball and the spring are arranged inside the steel sleeve, the steel ball is arranged on the grouting side, the spring is arranged on the opposite side, and a grouting hole is formed in the end face of the steel sleeve corresponding to the steel ball.
7. The grouting anchor rod with the increased resistance and the large deformation according to claim 1, wherein the conical bolt comprises a cylindrical part and a conical part, and the inner ring of the cylindrical part is a unthreaded hole; the inner ring of the cone part is provided with an inner resistance increasing stripe II, and the outer ring of the cone part is provided with an outer resistance increasing stripe.
8. The resistance-increasing deformation grouting bolt according to claim 7, wherein the smallest diameter of the conical through hole is larger than the diameter of the cylindrical portion of the conical bolt.
9. The method for applying the resistance-increasing and deformation-increasing grouting anchor according to any one of claims 1-8, comprising the following steps:
the sawtooth grouting sleeve is arranged at the head part of the resistance-increasing hollow grouting rod body, the self-feeding grouting stop plug, the resistance-increasing yielding tray and the conical bolt are sequentially arranged at the tail part of the resistance-increasing hollow grouting rod body, a rock mass to be grouting is drilled through a roof bolter, and the assembled resistance-increasing hollow grouting rod body is inserted into the rock mass; along with the deformation increase of the rock mass, the rock mass expands outwards, the rock mass extrudes the resistance-increasing yielding tray outwards, the taper bolt is pulled into the resistance-increasing yielding tray, the self-advancing type grouting plug is pushed into the rock mass, and when the taper bolt is completely pulled into the yielding sleeve head on the resistance-increasing yielding tray, grouting is carried out by adopting a grouting pump.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311234454.0A CN116988825B (en) | 2023-09-25 | 2023-09-25 | Resistance-increasing large-deformation grouting anchor rod and application method |
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| CN202311234454.0A CN116988825B (en) | 2023-09-25 | 2023-09-25 | Resistance-increasing large-deformation grouting anchor rod and application method |
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| CN116988825B true CN116988825B (en) | 2023-12-05 |
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Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2107826A1 (en) * | 1993-01-28 | 1994-07-29 | Harvey D. Gillespie | Mine Roof Bolt |
| WO2017156559A1 (en) * | 2016-03-11 | 2017-09-14 | Ncm Innovations (Pty) Ltd | Rock anchor forged head adaptor |
| CN107905827A (en) * | 2017-11-23 | 2018-04-13 | 西南石油大学 | A kind of self-advancing type hollow grouting anchor and application method with force measuring function |
| CN109057840A (en) * | 2018-08-20 | 2018-12-21 | 中钢集团马鞍山矿山研究院有限公司 | Adaptive grouting and reinforcing anchor pole and its anchoring construction method under a kind of high stress |
| CN109083668A (en) * | 2018-08-20 | 2018-12-25 | 中钢集团马鞍山矿山研究院有限公司 | A kind of grouting and reinforcing anchor pole suitable for high stress breaking surrounding rock supporting |
| CN109723480A (en) * | 2018-12-27 | 2019-05-07 | 山东科技大学 | Tension and compression coupling for country rock large deformation, which allows, presses energy-absorbing grouted anchor bar and working method |
| CN210919116U (en) * | 2019-08-19 | 2020-07-03 | 山东天勤矿山机械设备有限公司 | Resistance-increasing yielding grouting anchor rod and anchor cable |
| CN111608711A (en) * | 2020-06-24 | 2020-09-01 | 西安建筑科技大学 | Resistance-increasing expansion shell deformation anchor rod |
| CN111706374A (en) * | 2020-06-30 | 2020-09-25 | 河海大学 | Anchor head expansion resistance-increasing type drainable multistage yielding anchor rod |
| CN212803288U (en) * | 2020-06-23 | 2021-03-26 | 山东科技大学 | Yielding anchor rod capable of being bonded in full length |
| CN113107560A (en) * | 2021-05-11 | 2021-07-13 | 内蒙古双欣矿业有限公司 | Broken coal roadway reinforced anchoring type yielding grouting anchor rod anchoring device and using method thereof |
| CN115013016A (en) * | 2022-06-17 | 2022-09-06 | 湖南科技大学 | Drilling, anchoring, injecting and discharging integrated construction method for broken surrounding rock control |
| KR20230010913A (en) * | 2021-07-13 | 2023-01-20 | (주)케이씨엠티 | Fixing construction method of high-strength GFRP hollow bar for tunnel and ground reinforcement and its construction device |
| WO2023061044A1 (en) * | 2021-10-14 | 2023-04-20 | 中铁隧道集团二处有限公司 | Expansion shell yielding anchor cable and construction method thereof |
| CN116677436A (en) * | 2023-06-25 | 2023-09-01 | 中国矿业大学 | Porous yielding anchor rod device capable of grouting in segmented mode and application method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4526697B2 (en) * | 2000-12-20 | 2010-08-18 | 環境工学株式会社 | Construction material for civil engineering structure, civil engineering structure, and method for producing construction material for civil engineering structure |
-
2023
- 2023-09-25 CN CN202311234454.0A patent/CN116988825B/en active Active
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2107826A1 (en) * | 1993-01-28 | 1994-07-29 | Harvey D. Gillespie | Mine Roof Bolt |
| WO2017156559A1 (en) * | 2016-03-11 | 2017-09-14 | Ncm Innovations (Pty) Ltd | Rock anchor forged head adaptor |
| CN107905827A (en) * | 2017-11-23 | 2018-04-13 | 西南石油大学 | A kind of self-advancing type hollow grouting anchor and application method with force measuring function |
| CN109057840A (en) * | 2018-08-20 | 2018-12-21 | 中钢集团马鞍山矿山研究院有限公司 | Adaptive grouting and reinforcing anchor pole and its anchoring construction method under a kind of high stress |
| CN109083668A (en) * | 2018-08-20 | 2018-12-25 | 中钢集团马鞍山矿山研究院有限公司 | A kind of grouting and reinforcing anchor pole suitable for high stress breaking surrounding rock supporting |
| CN109723480A (en) * | 2018-12-27 | 2019-05-07 | 山东科技大学 | Tension and compression coupling for country rock large deformation, which allows, presses energy-absorbing grouted anchor bar and working method |
| CN210919116U (en) * | 2019-08-19 | 2020-07-03 | 山东天勤矿山机械设备有限公司 | Resistance-increasing yielding grouting anchor rod and anchor cable |
| CN212803288U (en) * | 2020-06-23 | 2021-03-26 | 山东科技大学 | Yielding anchor rod capable of being bonded in full length |
| CN111608711A (en) * | 2020-06-24 | 2020-09-01 | 西安建筑科技大学 | Resistance-increasing expansion shell deformation anchor rod |
| CN111706374A (en) * | 2020-06-30 | 2020-09-25 | 河海大学 | Anchor head expansion resistance-increasing type drainable multistage yielding anchor rod |
| CN113107560A (en) * | 2021-05-11 | 2021-07-13 | 内蒙古双欣矿业有限公司 | Broken coal roadway reinforced anchoring type yielding grouting anchor rod anchoring device and using method thereof |
| KR20230010913A (en) * | 2021-07-13 | 2023-01-20 | (주)케이씨엠티 | Fixing construction method of high-strength GFRP hollow bar for tunnel and ground reinforcement and its construction device |
| WO2023061044A1 (en) * | 2021-10-14 | 2023-04-20 | 中铁隧道集团二处有限公司 | Expansion shell yielding anchor cable and construction method thereof |
| CN115013016A (en) * | 2022-06-17 | 2022-09-06 | 湖南科技大学 | Drilling, anchoring, injecting and discharging integrated construction method for broken surrounding rock control |
| CN116677436A (en) * | 2023-06-25 | 2023-09-01 | 中国矿业大学 | Porous yielding anchor rod device capable of grouting in segmented mode and application method thereof |
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|---|---|
| CN116988825A (en) | 2023-11-03 |
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