CN110617094A - Shock-absorbing positioning composite grouting anchor rod capable of strengthening anchoring effect - Google Patents
Shock-absorbing positioning composite grouting anchor rod capable of strengthening anchoring effect Download PDFInfo
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- CN110617094A CN110617094A CN201910921929.0A CN201910921929A CN110617094A CN 110617094 A CN110617094 A CN 110617094A CN 201910921929 A CN201910921929 A CN 201910921929A CN 110617094 A CN110617094 A CN 110617094A
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- sleeve
- reinforcing
- outer sleeve
- inner sleeve
- side wall
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- 230000000694 effects Effects 0.000 title claims abstract description 23
- 238000004873 anchoring Methods 0.000 title claims abstract description 18
- 238000005728 strengthening Methods 0.000 title claims abstract description 6
- 239000002131 composite material Substances 0.000 title claims description 14
- 238000011084 recovery Methods 0.000 claims abstract description 14
- 230000006835 compression Effects 0.000 claims abstract description 13
- 238000007906 compression Methods 0.000 claims abstract description 13
- 238000013016 damping Methods 0.000 claims abstract description 5
- 238000006073 displacement reaction Methods 0.000 claims abstract description 5
- 230000003014 reinforcing effect Effects 0.000 claims description 76
- 239000004570 mortar (masonry) Substances 0.000 claims description 14
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 230000002708 enhancing effect Effects 0.000 claims description 4
- 230000035939 shock Effects 0.000 claims description 2
- 238000010521 absorption reaction Methods 0.000 claims 1
- 239000002002 slurry Substances 0.000 abstract description 5
- 210000001503 joint Anatomy 0.000 abstract 1
- 238000005553 drilling Methods 0.000 description 16
- 230000002787 reinforcement Effects 0.000 description 12
- 239000002689 soil Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 230000009471 action Effects 0.000 description 6
- 230000008093 supporting effect Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 239000011440 grout Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000007569 slipcasting Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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 OR ROCK 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
- E21D21/0033—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts having a jacket or outer tube
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Joining Of Building Structures In Genera (AREA)
Abstract
The invention provides a damping and positioning combined type grouting anchor rod capable of strengthening anchoring effect, which comprises a plurality of positioning devices and a plurality of drill rods, wherein two ends of each positioning device are used for being connected with the drill rods; the positioning device comprises an outer sleeve, an inner sleeve sleeved in the outer sleeve and a plurality of elastic pieces; a plurality of abdicating holes are arranged on the side wall of the outer sleeve along the circumferential direction, and relative displacement along the extension direction of the outer sleeve is arranged between the outer sleeve and the inner sleeve so that the outer sleeve has a first position and a second position which are opposite to the inner sleeve; the elastic pieces are arranged on the inner sleeve and are in a compression state and a recovery state, when the outer sleeve is located at the first position, the elastic pieces are located at the compression state, when the outer sleeve is located at the second position, the elastic pieces are one-to-one opposite to the yielding holes, and the elastic pieces penetrate through the yielding holes and are located at the recovery state and are used for being in butt joint with the hole wall of the drilled hole. The technical scheme provided by the invention aims to adjust the anchor rod to the middle position of the drilled hole, so that slurry around the anchor rod is uniformly distributed, and the anchor rod support has more effect.
Description
Technical Field
The invention relates to the technical field of geotechnical engineering protection, in particular to a damping and positioning combined type grouting anchor rod capable of strengthening anchoring effect.
Background
In geotechnical engineering, an anchoring technology is an important technology and is widely applied to reinforcement of geotechnical bodies. In the action process, the anchor rod provides an anchoring force, so that the dispersed rock-soil body can keep a relatively complete state, and the stability of the rock-soil body structure is ensured. In addition, the anchoring technology has the characteristics of safety, high efficiency and economy in supporting, and can effectively prevent deformation and collapse damage of rock and soil bodies. Bolting is one of the most effective support methods in the field of geotechnical engineering due to its superior characteristics.
However, in the engineering application field, on one hand, landslide accidents easily occur in a slope due to the crushability of the rock-soil mass, and in the process of using the anchor rod for supporting, the connection function of the anchor rod in the supporting process becomes weaker and weaker due to the crushability of the rock-soil mass, so that the rock-soil mass needs to be formed into a whole to ensure the stability of the anchor rod-rock-soil mass structure; on the other hand, in the stable state of anchor bolt support, the anchor bolt can be affected by various excavation disturbances, so that the anchor bolt is loosened, the support effect is affected, and therefore the anchor bolt is required to have certain adjusting capacity to cope with various stress disturbances. In addition, the stock is in strutting the in-process, if not taking measures, can sink to the drilling bottom because of the action of gravity to make the slurry can not keep fine being connected with the stock, the stock will be can effectual performance in the drilling, need to make the stock keep central position in getting into the drilling, the slip casting in-process just can make the stock around the slurry distribution even like this, makes the stock strut more effective.
Disclosure of Invention
In view of this, embodiments of the present invention provide a shock-absorbing and positioning composite grouting anchor rod capable of enhancing an anchoring effect, and the purpose is to adjust the anchor rod to a middle position of a drilled hole, so that slurry around the anchor rod is uniformly distributed, and the anchor rod support is more effective.
The embodiment of the invention provides a damping and positioning combined type grouting anchor rod capable of strengthening anchoring effect, which comprises a plurality of positioning devices and a plurality of drill rods, wherein two ends of each positioning device are connected with the drill rods to form an anchor rod body, and a plurality of grouting holes are formed in the side wall of the anchor rod body in a penetrating manner so as to allow mortar in the anchor rod body to pass through;
the positioning device comprises an outer sleeve, an inner sleeve sleeved in the outer sleeve and a plurality of elastic pieces, one end of the outer sleeve, far away from the inner sleeve, is used for being connected with the adjacent drill rod, and one end of the inner sleeve, far away from the outer sleeve, is used for being connected with the adjacent drill rod; the side wall of the outer sleeve is provided with a plurality of yielding holes in a penetrating manner along the circumferential direction, and relative displacement along the extension direction of the outer sleeve is arranged between the outer sleeve and the inner sleeve so that the outer sleeve has a first position and a second position which are opposite to the inner sleeve;
the elastic pieces are arranged along the circumferential interval distribution of the inner sleeve and extend radially to the inner sleeve, and are arranged on the inner sleeve, the elastic pieces are provided with a compression state and a recovery state, the outer sleeve is arranged at the first position, the elastic pieces are arranged at the compression state, the outer side wall of the inner sleeve is arranged between the inner side walls of the outer sleeve, the outer sleeve is arranged at the second position, the elastic pieces are arranged on the outer side walls of the outer sleeve, the elastic pieces are one-to-one opposite to the yielding holes, and the elastic pieces penetrate through the yielding holes and are arranged at the recovery state and are abutted to the hole walls of the drill holes.
Further, the device also comprises a fixed block, wherein the fixed block is positioned in the inner sleeve; a plurality of through holes are formed in the position, opposite to the fixed block, of the inner sleeve in a penetrating mode, one end of the elastic piece is located on the inner sleeve and connected with the fixed block, and the other end of the elastic piece penetrates through the through holes and extends out of the inner sleeve;
when the elastic piece is in a compression state, the elastic piece is abutted against the inner side wall of the outer sleeve, and when the elastic piece is in a recovery state, the through holes are arranged in one-to-one correspondence with the abdicating holes.
Further, the elastic piece comprises a spring and a fixing rod; the fixed rod extends along the radial direction of the inner sleeve, one end of the fixed rod is positioned in the inner sleeve and is connected with the fixed block through a spring, and the other end of the fixed rod penetrates through the through hole and extends out of the inner sleeve;
when the elastic piece is in a compression state, the fixing rod is abutted to the inner side wall of the outer sleeve, and when the elastic piece is in a recovery state, the fixing rod penetrates through the abdicating hole and is abutted to the side wall of the drilled hole.
Further, the dead lever is kept away from the one end of spring is buckled to both sides and is formed laminating portion, so that the dead lever is the T setting that appears, laminating portion be the arc setting with drilling lateral wall looks adaptation.
Furthermore, one end of the inner sleeve is connected with one end of the outer sleeve close to the end of the inner sleeve through a connecting spring.
Furthermore, the outer side wall of one end, close to the outer sleeve, of the inner sleeve protrudes outwards to form a first annular outer protruding portion, the inner side wall of the outer sleeve protrudes inwards to form an annular inner protruding portion, the annular inner protruding portion is located between the first annular outer protruding portion and one end, far away from the outer sleeve, of the inner sleeve, and the first annular outer protruding portion is matched with the annular inner protruding portion to limit the relative position of the inner sleeve and the outer sleeve.
Furthermore, the outer side wall of one end, far away from the outer sleeve, of the inner sleeve protrudes outwards to form a second annular outer convex part, and the second annular outer convex part is matched with one end, close to the inner sleeve, of the outer sleeve so as to limit the relative position of the inner sleeve and the outer sleeve.
Furthermore, the anchor rod body further comprises a plurality of reinforcing devices, each reinforcing device comprises a reinforcing sleeve and a reinforcing piece, two ends of each reinforcing sleeve are used for being connected with the drill rod, and the plurality of grouting holes are formed in the side wall of each reinforcing sleeve;
the side wall of the reinforcing sleeve is provided with a plurality of through holes at intervals along the circumferential direction, and the reinforcing piece is movably arranged on the side wall of the through hole and provided with an initial position located in the reinforcing sleeve and a reinforcing position, wherein one end of the reinforcing position penetrates through the through hole and is located outside the reinforcing sleeve; the reinforcing piece is extruded by mortar in the reinforcing sleeve to move from the initial position to the reinforcing position.
Further, the reinforcing member comprises a base plate and an overhanging plate formed by bending one end of the base plate, the reinforcing member is rotatably mounted on the side wall of the perforation, and when the reinforcing member is located at the reinforcing position, the overhanging plate penetrates through the perforation and is located outside the reinforcing sleeve.
Furthermore, the base plate is arranged in a fan shape, and the overhanging plate and the base plate are vertically arranged;
when the reinforcing piece is located at the initial position, the base plates are axially perpendicular to the reinforcing sleeve, a plurality of base plates are combined into a circular structure, and the overhanging plate is located in the through hole.
The technical scheme provided by the embodiment of the invention has the following beneficial effects: through be equipped with positioner between adjacent drilling rod, make outer tube and interior sleeve pipe have relative displacement through bulldozing or tensile stock, make the outer tube remove to the second position by the primary importance, thereby it is relative with the hole of stepping down to make the elastic component, because the elasticity recovery effect of elastic component, the elastic component passes the hole of stepping down and drilling pore wall looks butt, and then can adjust the stock to the intermediate position of drilling, avoid the drilling rod to be located the drilling rod bottom because the action of gravity, or the drilling rod is in the tilt state in drilling, make at the slip casting in-process, just can make the stock around the slurry distribution even, make the stock strut more effective.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of a shock-absorbing positioning composite grouting anchor rod capable of enhancing anchoring effect provided by the invention;
FIG. 2 is a schematic view of the positioning device of FIG. 1;
FIG. 3 is a schematic cross-sectional view of the positioning device of FIG. 1;
FIG. 4 is a schematic vertical cross-section of the positioning device of FIG. 1;
FIG. 5 is a schematic view of the reinforcing sleeve of FIG. 1;
FIG. 6 is a schematic view of the reinforcement device of FIG. 1 (with the reinforcement member in a reinforcement position);
FIG. 7 is a schematic cross-sectional view of the reinforcement device of FIG. 1 (with the reinforcement member in a reinforcement position);
FIG. 8 is a schematic longitudinal cross-sectional view of the reinforcement device of FIG. 1 (with the reinforcement member in the initial position);
FIG. 9 is a schematic diagram of the firmware structure of FIG. 1;
in the figure: the drilling tool comprises a positioning device 1, an 11 inner sleeve, a 111 through hole, a 12 outer sleeve, a 13 abdicating hole, a 14 elastic element, a 141 spring, a 142 fixing rod, a 143 attaching part, a 144 fixing block, a 15 first annular outer convex part, a 16 connecting spring, a 17 annular inner convex part, an 18 second annular outer convex part, a 19 annular bulge, a 2 drill rod, a 3 reinforcing device, a 31 reinforcing sleeve, a 32 through hole, a 33 grouting hole, a 34 reinforcing member, an 341 outer extending plate, a 342 base plate, a 4 grout stop plug, a 5 arch-shaped cushion plate and a 6 nut.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be further described with reference to the accompanying drawings.
Referring to fig. 1, an embodiment of the present invention provides a shock-absorbing positioning composite grouting anchor rod capable of enhancing anchoring effect, which includes a plurality of positioning devices 1, a plurality of drill rods 2, a plurality of reinforcing devices 3, a grout stop plug 4, an arched shim plate 5 and a nut 6.
The anchor rod is characterized in that two ends of the positioning device 1 and two ends of the reinforcing device 3 are used for being connected with the drill rod 2 to form an anchor rod body, the anchor rod body is used for being placed in a drill hole, the arched base plate 5 and the grout stop plug 4 are fixedly connected with the anchor rod body, and the nut 6 is in threaded connection with the anchor rod body (the prior art is adopted, and detailed description is not given here).
Referring to fig. 2 to 4, the positioning device 1 includes an outer sleeve 12, an inner sleeve 11 sleeved inside the outer sleeve 12, and a plurality of elastic members 14, wherein an end of the outer sleeve 12 away from the inner sleeve 11 is used for connecting to an adjacent drill rod 2, and an end of the inner sleeve 11 away from the outer sleeve 12 is used for connecting to an adjacent drill rod 2; the outer tube 12 lateral wall is equipped with a plurality of holes 13 of stepping down along circumference run through, the outer tube 12 with have between the interior sleeve pipe 11 and follow the relative displacement of outer tube 12 extending direction, so that the outer tube 12 have with interior sleeve pipe 11 relative primary importance and second place locate the stock in the drilling, through tensile or bulldoze the stock and be located the outer one end of drilling, can drive outer tube 12 and move to the second place by primary importance.
Specifically, one end of the inner sleeve 11 is connected to one end of the outer sleeve 12 close to the end of the inner sleeve 11 through a connecting spring 16, when the connecting spring 16 is in an initial state, the outer sleeve 12 can be fixed at the first position, and the connecting spring 16 is in a compressed or stretched state by pushing or stretching the anchor rod, so that the outer sleeve 12 moves from the first position to the second position, and meanwhile, a certain damping effect can be provided, so that the anchor rod has an adjusting capability under the action of a certain external force. In this embodiment, one end of the outer sleeve 12 away from the inner sleeve 11 is bent inward to form an annular protrusion 19, and one end of the connection spring 16 is connected to one end of the inner sleeve 11 close to the outer sleeve 12, and the other end is connected to the annular protrusion 19.
Furthermore, the outer side wall of one end of the inner sleeve 11 close to the outer sleeve 12 protrudes outwards to form a first annular outer convex portion 15, the inner side wall of the outer sleeve 12 protrudes inwards to form an annular inner convex portion 17, the annular inner convex portion 17 is located between the first annular outer convex portion 15 and one end of the inner sleeve 11 far away from the outer sleeve 12, the first annular outer convex portion 15 is matched with the annular inner convex portion 17 to limit the relative position of the inner sleeve 11 and the outer sleeve 12, and one end of the inner sleeve 11 close to the outer sleeve 12 can be limited in the outer sleeve 12. The outer side wall of one end of the inner sleeve 11, which is far away from the outer sleeve 12, protrudes outwards to form a second annular outer convex part 18, the second annular outer convex part 18 is matched with one end of the outer sleeve 12, which is close to the inner sleeve 11, so as to limit the relative position of the inner sleeve 11 and the outer sleeve 12, and the end of the inner sleeve 11, which is far away from the outer sleeve 12, is limited outside the outer sleeve 12, so that the separation of the outer sleeve 12 and the inner sleeve 11 can be avoided, and the integrity of the outer sleeve 12 and the inner sleeve 11 is improved.
A plurality of elastic components 14 are followed interior sleeve pipe 11 circumference interval distribution, and all follow interior sleeve pipe 11 radially extends, locates interior sleeve pipe 11 is last, elastic component 14 has compression state and answer state, outer tube 12 is located during the first position, elastic component 14 is located the compression state, be located interior sleeve pipe 11 lateral wall with between the outer tube 12 inside wall, outer tube 12 is located during the second position, it is a plurality of elastic component 14 and a plurality of hole 13 of stepping down is relative one by one, elastic component 14 passes hole 13 of stepping down is located answer state, be used for with drilling pore wall looks butt, elastic component 14 set up can provide certain shock attenuation effect to the stock for the stock has the regulating power under certain exogenic action.
In this embodiment, referring to fig. 4, a fixing block 144 is disposed in the inner sleeve 11, a plurality of through holes 111 are disposed through the inner sleeve 11 at a position opposite to the fixing block 144, one end of the elastic element 14 is located in the inner sleeve 11 and connected to the fixing block 144, and the other end of the elastic element extends out of the inner sleeve 11 through the through holes 111; when the elastic part 14 is in a compressed state, the elastic part 14 abuts against the inner side wall of the outer sleeve 12, when the elastic part 14 is in a recovery state, the through holes 111 are arranged in the yielding holes 13 in a one-to-one correspondence manner, and the elastic part 14 penetrates through the yielding holes 13 and the side wall of the drilled hole in an abutting manner. So configured, when the outer sleeve 12 is in the first position, the degree of compression of the resilient member 14 is reduced, avoiding damage to the resilient member 14.
Further, the elastic element 14 includes a spring 141 and a fixing rod 142, the fixing rod 142 extends along the inner sleeve 11 in the radial direction, one end of the fixing rod 142 is located in the inner sleeve 11 and connected to the fixing block 144 through the spring 141, and the other end of the fixing rod passes through the through hole 111 and extends out of the inner sleeve 11; when the elastic element 14 is in a compressed state, the fixing rod 142 abuts against the inner side wall of the outer sleeve 12, and when the elastic element 14 is in a recovery state, the fixing rod 142 penetrates through the abdicating hole 13 and abuts against the side wall of the drilled hole. By providing a securing rod 142, the anchor bar support of the resilient member 14 is enhanced.
Further, the fixing rod 142 is far away from one end of the spring 141 is bent to two sides to form a fitting part 143, so that the fixing rod 142 is in a T-shaped arrangement, the fitting part 143 is in an arc arrangement so as to be matched with the side wall of the drill hole, so that the fixing rod 142 extends out of the abdicating hole 13 to be fitted with the side wall of the drill hole, the contact area between the fixing rod 142 and the side wall of the drill hole is increased, and the stability of the fixing rod 142 for supporting the anchor rod is increased.
It should be noted that, the inner sleeve 11 is disposed along the transverse direction, and the specific positions of the plurality of elastic members 14 in the transverse direction may be different, in this embodiment, the positions of the plurality of elastic members 14 in the transverse direction are the same, and correspondingly, the positions of the plurality of through holes 111 and the plurality of relief holes 13 in the transverse direction are also the same, so that the elastic members 14 have a supporting effect on the same position of the anchor rod, and the stability of the elastic members 14 for positioning the anchor rod can be enhanced.
In this embodiment, elastic component 14 is equipped with four, follows the even interval setting of interior sleeve pipe 11 circumference, is located four directions about from top to bottom respectively, outer tube 12 lateral wall evenly is equipped with four holes 13 of stepping down along circumference, with elastic component 14 looks adaptation to support the stock from four directions, be located the stock in the middle of the drilling.
Referring to fig. 5 to 9, the reinforcing device 3 includes a reinforcing sleeve 31 and a reinforcing member 34, the side wall of the anchor body is provided with a plurality of grouting holes 33, in this embodiment, the plurality of grouting holes 33 are provided in the side wall of the reinforcing sleeve 31, and two ends of the reinforcing sleeve 31 are used for connecting with the drill rod 2 so as to allow mortar located in the reinforcing sleeve 31 to pass through; a plurality of through holes 32 are formed through the side wall of the reinforcing sleeve 31 at intervals along the circumferential direction, the reinforcing members 34 are movably arranged on the side wall of the through holes 32 and have initial positions located in the reinforcing sleeve 31 and reinforcing positions with one ends passing through the through holes 32 and located outside the reinforcing sleeve 31; the reinforcement 34 is displaced from the initial position into the reinforcement position by the mortar pressure in the reinforcement sleeve 31.
In other embodiments, the reinforcing member 34 may be slidably mounted on the sidewall of the through hole 32, in this embodiment, referring to fig. 7 and 9, the reinforcing member 34 includes a base plate 342 and an outward extending plate 341 bent along one end of the base plate 342, the reinforcing member 34 is rotatably mounted on the sidewall of the through hole 32, and when the reinforcing member 34 is located at the reinforcing position, the outward extending plate 341 passes through the through hole 32 and is located outside the reinforcing sleeve 31.
Specifically, referring to fig. 8, the base plate 342 is disposed in a fan shape, the overhang plate 341 and the base plate 342 are disposed vertically, when the reinforcing member 34 is located at the initial position, the base plate 342 is axially perpendicular to the reinforcing sleeve 31, a plurality of base plates 342 are combined into a circular structure, and the overhang plate 341 is located in the through hole 32, so that when mortar flows in the reinforcing sleeve 31, the extrusion effect of the mortar on the reinforcing member 34 can be ensured, and the overhang plate 341 rotates to the outside of the reinforcing sleeve 31.
According to the technical scheme provided by the embodiment of the invention, the positioning device 1 is arranged in the anchor rod, the outer sleeve 12 and the inner sleeve 11 are relatively displaced by pushing or stretching the anchor rod, the outer sleeve 12 is moved from the first position to the second position, and the fixing rod 142 is opposite to the abdicating hole 13, and due to the elastic recovery effect of the spring 141, the fixing rod 142 penetrates through the abdicating hole 13 to be abutted against the wall of the drilled hole, so that the anchor rod can be adjusted to the middle position of the drilled hole, and the drill rod 2 can be prevented from being positioned at the bottom of the drill rod 2 due to the action of gravity. The mortar is injected into one end of the anchor rod, the mortar enters the fixed sleeve, thrust is applied to the base plate 342, the fixing piece is enabled to rotate to a fixed position from an initial position, the extending plate 341 is enabled to rotate to the outside of the fixed sleeve, the mortar penetrates out of the grouting hole 33 and flows between the anchor rod and the side wall of the drilled hole, the extending plate 341 is enabled to be fixed in the mortar, the extending plate 341 and the mortar form a whole, the anchor rod is fixed with the surrounding rock-soil body, the integrity of the anchor rod and the mortar can be enhanced, meanwhile, the connection between the anchor rod and the surrounding broken rock-soil body can be enhanced, and a better supporting effect. Because in the stable state of anchor bolt support maintenance, can receive the influence of various excavation disturbances, owing to elastic component 14 and connecting spring 16's setting for the anchor bolt has certain regulation can in order to deal with various stress disturbances, avoids the anchor bolt to take place not hard up, prevents that the support effect from receiving the influence.
Generally, the anchor rod is placed in the borehole and is not necessarily kept in a horizontal state but is positioned at the bottom of the borehole, and may be in an inclined state.
In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.
The features of the embodiments and embodiments described herein above may be combined with each other without conflict.
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 invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The shock-absorbing and positioning combined type grouting anchor rod capable of strengthening the anchoring effect is characterized by comprising a plurality of positioning devices and a plurality of drill rods, wherein two ends of each positioning device are connected with the drill rods to form an anchor rod body, and a plurality of grouting holes are formed in the side wall of the anchor rod body in a penetrating mode so that mortar in the anchor rod body can penetrate through the side wall;
the positioning device comprises an outer sleeve, an inner sleeve sleeved in the outer sleeve and a plurality of elastic pieces, one end of the outer sleeve, far away from the inner sleeve, is used for being connected with the adjacent drill rod, and one end of the inner sleeve, far away from the outer sleeve, is used for being connected with the adjacent drill rod; the side wall of the outer sleeve is provided with a plurality of yielding holes in a penetrating manner along the circumferential direction, and relative displacement along the extension direction of the outer sleeve is arranged between the outer sleeve and the inner sleeve so that the outer sleeve has a first position and a second position which are opposite to the inner sleeve;
the elastic pieces are arranged along the circumferential interval distribution of the inner sleeve and extend radially to the inner sleeve, and are arranged on the inner sleeve, the elastic pieces are provided with a compression state and a recovery state, the outer sleeve is arranged at the first position, the elastic pieces are arranged at the compression state, the outer side wall of the inner sleeve is arranged between the inner side walls of the outer sleeve, the outer sleeve is arranged at the second position, the elastic pieces are arranged on the outer side walls of the outer sleeve, the elastic pieces are one-to-one opposite to the yielding holes, and the elastic pieces penetrate through the yielding holes and are arranged at the recovery state and are abutted to the hole walls of the drill holes.
2. The shock-absorbing positioning composite grouting anchor rod capable of reinforcing anchoring effect of claim 1, further comprising a fixing block, wherein the fixing block is positioned in the inner sleeve; a plurality of through holes are formed in the position, opposite to the fixed block, of the inner sleeve in a penetrating mode, one end of the elastic piece is located on the inner sleeve and connected with the fixed block, and the other end of the elastic piece penetrates through the through holes and extends out of the inner sleeve;
when the elastic piece is in a compression state, the elastic piece is abutted against the inner side wall of the outer sleeve, and when the elastic piece is in a recovery state, the through holes are arranged in one-to-one correspondence with the abdicating holes.
3. A shock-absorbing and positioning composite grouting anchor rod capable of reinforcing anchoring effect as claimed in claim 2, wherein said elastic member comprises a spring and a fixing rod; the fixed rod extends along the radial direction of the inner sleeve, one end of the fixed rod is positioned in the inner sleeve and is connected with the fixed block through a spring, and the other end of the fixed rod penetrates through the through hole and extends out of the inner sleeve;
when the elastic piece is in a compression state, the fixing rod is abutted to the inner side wall of the outer sleeve, and when the elastic piece is in a recovery state, the fixing rod penetrates through the abdicating hole and is abutted to the side wall of the drilled hole.
4. The composite grouting anchor rod with shock absorption and positioning functions as claimed in claim 3, wherein one end of the fixing rod away from the spring is bent towards two sides to form an engaging portion, so that the fixing rod is T-shaped, and the engaging portion is arc-shaped to match with the side wall of the drilled hole.
5. A shock-absorbing and positioning composite grouting anchor capable of reinforcing anchoring effect as claimed in claim 1, characterized in that one end of the inner sleeve is connected with one end of the outer sleeve close to the end of the inner sleeve through a connecting spring.
6. A shock-absorbing and positioning composite grouting anchor as claimed in claim 1, wherein the outer side wall of the end of the inner sleeve near the outer sleeve protrudes outward to form a first annular outer protrusion, the inner side wall of the outer sleeve protrudes inward to form an annular inner protrusion, the annular inner protrusion is located between the first annular outer protrusion and the end of the inner sleeve far from the outer sleeve, and the first annular outer protrusion cooperates with the annular inner protrusion to limit the relative position of the inner sleeve and the outer sleeve.
7. The anchor-enhancing shock-absorbing and positioning composite grouting anchor rod according to claim 1, wherein an outer side wall of one end of the inner sleeve, which is far away from the outer sleeve, protrudes outwards to form a second annular outer protrusion, and the second annular outer protrusion is matched with one end of the outer sleeve, which is near to the inner sleeve, so as to limit the relative positions of the inner sleeve and the outer sleeve.
8. The shock-absorbing and positioning composite grouting anchor rod capable of enhancing anchoring effect as claimed in claim 1, wherein the anchor rod body further comprises a plurality of reinforcing devices, including a reinforcing sleeve and a reinforcing member, two ends of the reinforcing sleeve are used for being connected with the drill rod, and the plurality of grouting holes are formed in the side wall of the reinforcing sleeve;
the side wall of the reinforcing sleeve is provided with a plurality of through holes at intervals along the circumferential direction, and the reinforcing piece is movably arranged on the side wall of the through hole and provided with an initial position located in the reinforcing sleeve and a reinforcing position, wherein one end of the reinforcing position penetrates through the through hole and is located outside the reinforcing sleeve; the reinforcing piece is extruded by mortar in the reinforcing sleeve to move from the initial position to the reinforcing position.
9. A vibration damping and positioning composite grouting anchor capable of reinforcing anchoring effect as claimed in claim 8, characterized in that said reinforcing member comprises a base plate and an overhanging plate bent and formed along one end of said base plate, said reinforcing member is rotatably mounted on the side wall of said through hole, and when said reinforcing member is located at said reinforcing position, said overhanging plate passes through said through hole and is located outside said reinforcing sleeve.
10. The shock-absorbing and positioning composite grouting anchor rod capable of reinforcing anchoring effect of claim 9, wherein the base plate is in a fan shape, and the overhanging plate and the base plate are in a vertical arrangement;
when the reinforcing piece is located at the initial position, the base plates are axially perpendicular to the reinforcing sleeve, a plurality of base plates are combined into a circular structure, and the overhanging plate is located in the through hole.
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| CN111157704A (en) * | 2020-01-20 | 2020-05-15 | 中国地质大学（武汉） | Vertical structural surface grouting test device and test method |
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