CN108756970A - A kind of hollow grouting cable anchor of segmented and application method - Google Patents

A kind of hollow grouting cable anchor of segmented and application method Download PDF

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Publication number
CN108756970A
CN108756970A CN201810764089.7A CN201810764089A CN108756970A CN 108756970 A CN108756970 A CN 108756970A CN 201810764089 A CN201810764089 A CN 201810764089A CN 108756970 A CN108756970 A CN 108756970A
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CN
China
Prior art keywords
cable
hole
sealing
anchor
segmented
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CN201810764089.7A
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Chinese (zh)
Inventor
成云海
于永春
庞继禄
李峰辉
顾玉明
游先中
刘思佳
李希琨
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Anhui University of Science and Technology
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Anhui University of Science and Technology
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Application filed by Anhui University of Science and Technology filed Critical Anhui University of Science and Technology
Priority to CN201810764089.7A priority Critical patent/CN108756970A/en
Publication of CN108756970A publication Critical patent/CN108756970A/en
Pending legal-status Critical Current

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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D20/00Setting anchoring-bolts
    • E21D20/02Setting anchoring-bolts with provisions for grouting
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D21/00Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection

Abstract

The present invention relates to geotechnical engineering supporting fields, the hollow grouting cable anchor of specifically a kind of segmented and application method, the hollow grouting cable anchor of segmented, including anchor cable ontology, segmented hole sealing device, the anchor cable ontology includes cable body (1), urosome nut (2) and backing plate (3), backing plate (3) is installed on the cable body (1), and is threaded with urosome nut (2) on the cable body (1) of the side of the backing plate (3);The segmented hole sealing device includes the sealing of hole plug (7) being arranged on the cable body (1);Casing (5) is set on the outside of the sealing of hole plug (7), and described sleeve pipe (5) side is set with fixed frame (6);The inside of the fixed frame (6) is placed with stereoplasm bag.The anchor cable structure is simple, easy to process, improves the deficiency of existing grouting cable anchor, solve present supporting grouting cable anchor slip casting effect it is poor the problems such as, improve working efficiency, reduce support cost.

Description

A kind of hollow grouting cable anchor of segmented and application method
Technical field
The invention belongs to geotechnical engineering support technology field, the hollow grouting cable anchor of specifically a kind of segmented and use Method.
Background technology
Geotechnical engineering such as subway, tunnel, side slope, roadway, culvert, dam etc., meet geology crushed zone, part soft rock, easily Inbreak wall caving, large deformation, has that water outlet or gushing water be dangerous, when piping at landslide failure, and grouting and reinforcing is common first choice side One of method, method, using the bonding of injection slurries and coagulation mechanism etc., are reached by grouting cable anchor, grouted anchor bar etc. To country rock is reinforced, supporting, water blockoff and other effects are significantly improved.
At present using grouting cable anchor there are the problem of:Using anchor rope grouting, hole depth is close in deep hole or geology even up to hundred meters The slurries of real section injection are few, cause slurries expanding infiltration uneven, there are plane of weakness, cause or possible generation infiltration leak is prominent Water, inbreak wall caving landslide etc..The method solved at present is multiple note, encryption drilling etc., causes quantities great, and be also difficult to reach To safety requirements.
Invention content
In order to make up for the deficiencies of the prior art, a kind of hollow grouting cable anchor of segmented proposed by the present invention and application method, Segmented grouting and reinforcing cannot be carried out to deep wall rock by solving existing anchor cable, be conducive to the grouting amount for improving deep rock crack, Grouting and reinforcing or plugging effect are significantly improved, supporting is undesirable etc. after preventing slip casting caused by shallow-layer running pulp uneven or slip casting asks Topic.
The technical solution adopted by the present invention to solve the technical problems is:A kind of hollow grouting cable anchor of segmented, including anchor Suo Benti, segmented hole sealing device, the anchor cable ontology include cable body, body nut and backing plate (pallet), are installed on the cable body There is backing plate, and is threaded with urosome nut on the cable body of the side of the backing plate;The segmented hole sealing device includes The sealing of hole plug being arranged on the cable body;Casing is set on the outside of the sealing of hole plug, and described sleeve pipe side is set with admittedly Determine frame;The inside of the fixed frame is placed with stereoplasm bag.
Preferably, the cable body is made of steel strand wires and Grouting Pipe;The casing can be plastic bushing or chemistry Glass bushing has some strength and brittleness;The stereoplasm bag includes outer stereoplasm bag, and in being internally provided with of the outer stereoplasm bag Stereoplasm bag, and nylon sticking belt is equipped between the interior stereoplasm bag and the outer stereoplasm bag;It is connected on the nylon adherent buckle band Operating rope.
Preferably, the segmented hole sealing device is one, two or N number of, and cable body is divided into two, three or N+1 region, excellent Two are first selected, three regions, that is, slip casting region A, slip casting region B and slip casting region C, slip casting region A are cable body tail end to first The fixed frame top of a hole sealing device, slip casting region B are the fixed frame top of first hole sealing device to second hole sealing device Fixed frame top, slip casting region C be second hole sealing device fixed frame top to cable body front end, grouting sequence is by C sections of-B - A sections of section.
Preferably, there is the injected hole of perforation in the cable body;It is equipped with slurry outlet, institute at the corresponding cable body of the hole sealing device Stating has lubrication so that pulp plug can be moved up and down along cable body between sealing of hole plug and cable body slurry outlet, described sleeve pipe coordinates phase with sealing of hole plug Set.
Slurry outlet aperture is equal at slip casting the region B and A, and quantity is identical, and the thickness of the casing at region B and region A Degree is different.
The hollow grouting cable anchor of segmented further includes the pulp mechanism for controlling slurries flowing, and the pulp mechanism includes peace Head cover mounted in the cable body top, and the side wall of the cable body is equipped with the second through-hole;Work is installed inside second through-hole Plug, and the piston is made of bellmouth, tail portion, middle part and head, the head of piston is truncated cone-shaped structure, the inclination angle of side wall Degree is 45 ° (or doing adjustment appropriate according to anchor cable structure), and the middle part of piston is truncated cone-shaped structure, and the angle of inclination of side wall is 8-15 ° (or adjustment appropriate is done according to anchor cable structure).
A kind of application method of the hollow grouting cable anchor of segmented, the application method packet of the hollow grouting cable anchor of the segmented Two kinds of sealing of hole modes are included, it is specific as follows:
The first sealing of hole mode:In a cylindrical outer interior stereoplasm bag of stereoplasm bag inner sleeve one, chemical grout A is placed on interior In stereoplasm bag, chemical grout B is placed in outer stereoplasm bag;Interior stereoplasm bag side wall is equipped with opening, and opening is sealed with nylon sticking belt Firmly, there is operating rope in system at nylon sticking belt upper port;Pull operation rope makes the chemical grout of containing to pull open nylon sticking belt A is mixed by the pulling of operating rope with the chemical grout B in outer stereoplasm bag, to realize expansion segmentation sealing of hole;
Second of sealing of hole mode:Static expanding agent (or the similar material such as expanding cement of matched doses is put into stereoplasm bag Material), dosage is 0.9-1.3kg/m (or determining dosage according to material character), is tuned into flowing shape slurry with suitable quantity of water, waits for one section Static expanding agent is due to the expansion of itself after reaction time, under the constraint of hole wall, radially to hole wall generate compared with The big bulbs of pressure realize sealing of hole segmentation.
Preferably, the diameter of the interior stereoplasm bag in the first described sealing of hole mode is less than bore diameter, length.
Preferably, the pulp mode of the first sealing of hole mode:The fixed frame is divided into two parts, passes through two or more Root screw passes through aperture on the upside of fixed frame, preferential to choose two, is fixed on cable body by nut preload, the outer stereoplasm bag is logical It crosses knot to be fixed on cable body, fixed frame outer wall is that transparent plastic ensures that stereoplasm bag is not broken in cable body anchoring procedure by rock Bad, a diameter of 6mm of sealing of hole plug (or being made the appropriate adjustments according to anchor cable structure) has profit between the two with the mating steady conjunction of slurry outlet It is sliding;Slurry outlet interval 150mm (or being made the appropriate adjustments according to anchor cable structure), slurry outlet is only in the segmented sealing of hole of cable body installation It is equipped with below device, slurry outlet is not provided at every level-one end 1000mm (or being made the appropriate adjustments according to anchor cable structure);It is described Casing is hollow, and diameter is more than cable body diameter, and installation to cable body pulp bore region, length covering is per level-one slurry outlet region, with envelope Stopple cooperation makes it not slide up and down;Described sleeve pipe is only installed in region B and region A, and the casing thickness of region A installations is more than The thickness of region B installations;Ensure that the pressure that B, region A pulps are broken through is different.
Preferably, another pulp mode of the first sealing of hole mode is:The fixed frame is divided into two parts, passes through Two or more screws pass through aperture on the upside of fixed frame, and preferential to choose two, nut preload is fixed on cable body, the outer stereoplasm Bag is fixed on by knot on cable body, and fixed frame outer wall is that transparent plastic ensures stereoplasm bag in cable body anchoring procedure not by rock It destroys, a diameter of 6mm of sealing of hole plug (or being made the appropriate adjustments according to anchor cable structure) has between the two with the mating steady conjunction of slurry outlet Lubrication;Slurry outlet interval 150mm (or being made the appropriate adjustments according to anchor cable structure), slurry outlet is only in the segmented envelope of cable body installation It is equipped with below aperture apparatus, slurry outlet is not provided at every level-one end 1000mm (or being made the appropriate adjustments according to anchor cable structure);? Sealing of hole is held fasten operating rope beyond the Great Wall, and the operating rope of slip casting region A, B and C all sealing of hole plugs finally rotates to be a rope;To Under when pullling operating rope, the sealing of hole plug in whole disconnected pulp region is all pulled off.
Beneficial effects of the present invention are as follows:
1. structure of the invention is simple, easy to process, the deficiency of existing grouting cable anchor is improved, solves the slip casting of present supporting The problems such as anchor rope grouting effect is poor improves working efficiency, reduces support cost, reduce the input of manpower and materials;
2. segmented hole-sealing technology of the present invention, when solving deep layer rock progress grouting and reinforcing, shallow-layer running pulp, slip casting effect The problems such as undesirable, while realizing and slip casting targetedly is carried out to different zones;Significantly improve safe effect;It avoids because of construction The factors such as material cause the case where cannot achieve construction purpose;Improve the integrality of breaking surrounding rock structure.Reinforce hollow type slip casting The full length fastening of anchor cable.
Description of the drawings
The invention will be further described below in conjunction with the accompanying drawings.
Fig. 1 is the overall structure figure of the grouting cable anchor of the present invention;
Fig. 2 is the outer stereoplasm bag of the present invention and interior stereoplasm bag connection diagram;
Fig. 3 is the sealing of hole plug structure schematic diagram of the present invention;
Fig. 4 is the sleeve structure schematic diagram of the present invention;
Fig. 5 is the fixed frame structural schematic diagram of the present invention;
Fig. 6 is the fixed frame scheme of installation of the present invention;
Fig. 7 is the cable body slip casting schematic diagram of the present invention;
Fig. 8 is the piston structure schematic diagram of the present invention;
Fig. 9 is the piston cross-section structural schematic diagram of the present invention.
In figure:1, cable body, 2, urosome nut, 3, backing plate, 4, rock, 5, casing, 6, fixed frame, 7, sealing of hole plug, 8, operation Rope, 9, drilling, 10, outer stereoplasm bag, 11, interior stereoplasm bag, 12, nylon sticking belt;25, head cover, 26, grouting pump, 27, second is logical Hole, 28, piston, 28a, bellmouth, 28b, tail portion, 28c, middle part, 28d, head.
Specific implementation mode
In order to make the technical means, the creative features, the aims and the efficiencies achieved by the present invention be easy to understand, tie below Specific implementation mode is closed, the present invention is further explained.
As shown in Figures 1 to 6, the hollow grouting cable anchor of a kind of segmented, including anchor cable ontology, segmented hole sealing device, institute It includes cable body 1, urosome nut 2 and backing plate 3 to state anchor cable ontology, and backing plate 3, and the side of the backing plate 3 are equipped on the cable body 1 The cable body 1 on be threaded with urosome nut 2;The segmented hole sealing device includes the sealing of hole being arranged on the cable body Plug 7;Casing 5 is set on the outside of the sealing of hole plug 7, and 5 side of described sleeve pipe is set with fixed frame 6;The fixed frame 6 Inside is placed with stereoplasm bag.
As another embodiment of the present invention, the cable body is made of steel strand wires and Grouting Pipe;The casing can To be plastic bushing or chemical glass casing, there is some strength and brittleness;The stereoplasm bag includes outer stereoplasm bag 10, and described Outer stereoplasm bag 10 is internally provided with interior stereoplasm bag 11, and nylon stick is equipped between the interior stereoplasm bag 11 and the outer stereoplasm bag 10 Cingulum 12;Operating rope 8 is connected on the nylon sticking belt 12.
As one embodiment of the present invention, the segmented hole sealing device is two, and cable body 1 is divided for three areas Domain, that is, slip casting region A, slip casting region B and slip casting region C, slip casting region A are fixation of 1 tail end of cable body to first hole sealing device 6 top of frame, B are 6 top of fixed frame of first hole sealing device to 6 top of fixed frame of second hole sealing device, C second 6 top of fixed frame of a hole sealing device to 1 front end of cable body;Grouting sequence is by C sections-B sections-A sections.
There is the injected hole of perforation in the cable body 1;It is equipped with slurry outlet, the sealing of hole at the corresponding cable body of the hole sealing device There is lubrication between plug 7 and 1 slurry outlet of cable body so that sealing of hole plug can be moved up and down along cable body, described sleeve pipe 5 coordinates phase with sealing of hole plug 7 Set.
Slurry outlet aperture is equal at slip casting the region B and A, and quantity is identical, and the resin glass at region B and region A The thickness of casing is different.
The slip casting mechanism includes the head cover 25 mounted on 1 top of the cable body, and the side wall of the cable body 1 is equipped with second Through-hole 27;Piston 28 is installed, and the piston 28 is by bellmouth 28a, tail portion 28b, middle part 28c inside second through-hole 27 It is formed with head 28d, the head 28d of piston 28 is truncated cone-shaped structure, and the angle of inclination of side wall is 45 °, the middle part 28c of piston 28 Angle of inclination for truncated cone-shaped structure, side wall is 8-15 °, and polyurethane piston rubber piston is when sidewall slope angle is 8-10 ° During the pressure of anchor cable inner space increases, when it is 1-3MPA to apply pressure, 28 tail hole of piston by compressive deformation, Piston is set to go out.Polyurethane piston rubber piston pressure of anchor cable inner space when sidewall slope angle is 11-15 ° increased Cheng Zhong, when applying pressure more than 5MPA, 28 tail hole of piston makes piston 28 go out by compressive deformation.Grouting pump 26 connects It is connected in cable body 1.
A kind of application method of the hollow grouting cable anchor of segmented, the application method packet of the hollow grouting cable anchor of the segmented Two kinds of sealing of hole modes are included, it is specific as follows:
The first sealing of hole mode:In a cylindrical outer interior solid water mud cloth bag of stereoplasm bag inner sleeve one, chemical grout A is put It sets in interior stereoplasm bag 11, chemical grout B is placed in outer stereoplasm bag 10;Interior stereoplasm bag side wall is equipped with opening, and opening uses Buddhist nun Imperial magic tape 12 seals, and there is operating rope 8 in system at 12 upper port of nylon sticking belt;Pull operation rope 8 is to pull open nylon sticking belt 12, so that the pulling that the chemical grout A of containing passes through operating rope 8 is mixed with the chemical grout B in outer stereoplasm bag 10, it is swollen to realize Swollen segmentation sealing of hole.
Second of sealing of hole mode:The static expanding agent of matched doses is put into stereoplasm bag, dosage is 0.9~1.3kg/m, It is tuned into flowing shape slurry with suitable quantity of water, static expanding agent is due to the expansion of itself after waiting for one section of reaction time, in hole wall Constraint under, radially generate the larger bulbs of pressure to hole wall, realize sealing of hole segmentation.
As one embodiment of the present invention, the diameter of the interior stereoplasm bag 11 in the first described sealing of hole mode, which is less than, to be bored Bore dia, length.
As one embodiment of the present invention, the pulp mode of the first sealing of hole mode:The fixed frame is divided into Two parts pass through aperture on the upside of fixed frame, nut preload to be fixed on cable body by two screws, and the outer stereoplasm bag 10 passes through Knot is fixed on cable body 1, and 6 outer wall of fixed frame is that transparent plastic ensures that stereoplasm bag is not broken in 1 anchoring procedure of cable body by rock Bad, 7 a diameter of 6mm of the sealing of hole plug has lubrication between the two with the mating steady conjunction of slurry outlet;Slurry outlet interval 150mm, pulp Hole is only equipped with below the segmented hole sealing device that cable body 1 is installed, and slurry outlet is not provided at every level-one end 1000mm;It is described Casing 5 is hollow, and diameter is more than 1 diameter of cable body, installation to 1 pulp bore region of cable body, and length covers every level-one slurry outlet region, with The cooperation of sealing of hole plug 7 makes it not slide up and down;The plastics 5 are only installed in region B and region A, and the casing 5 of region A installations is thick Degree is more than the thickness of region B installations;Ensure that the pressure that B, region A pulps are broken through is different.
As one embodiment of the present invention, another pulp mode of the first sealing of hole mode:The fixation Frame 6 divides for two parts, and two screws pass through 6 upside aperture of fixed frame, is fixed on cable body 1 by nut preload, described outer solid Slurry bag 10 is fixed on by knot on cable body 1, and 6 outer wall of fixed frame is that transparent plastic ensures stereoplasm bag in 1 anchoring procedure of cable body Not by the rock failure mechanism of rock, 7 a diameter of 6mm of the sealing of hole plug has lubrication between the two with the mating steady conjunction of slurry outlet;Slurry outlet interval 150mm, slurry outlet are only equipped with below the segmented hole sealing device that cable body 1 is installed, are not set at every level-one end 1000mm There is slurry outlet;Operating rope 8 is fastened in 7 upper end of sealing of hole plug, the operating rope of region A, B and C all sealing of hole plugs finally rotates to be one Root rope;When pullling operating rope downwards, the sealing of hole plug 7 in whole section of pulp region is all pulled off.
The drive nylon sticking belt 12 of pull operation rope 8 is opened, the chemical grout A in interior stereoplasm bag 11 and outer stereoplasm bag Chemical grout B mixing in 12 expands sealing of hole in turn to which two kinds of slurries react, and reaches segmentation sealing of hole purpose.Pass through Fixed frame 6 ensures that outer stereoplasm bag 10 is not destroyed by rock 4, the mating sealing of hole plug 7 mutually surely closed therewith on the slurry outlet of every level-one, Except having lubrication slurry outlet therebetween, and cover corresponding casing 5, and at slip casting region B, a-quadrant casing 5 thickness it is different, protect It is different from the pressure of casing 5 that card slurries break through sealing of hole plug 7.B, a-quadrant not pulp after slip casting, first carry out C slip castings, due to segmented The reason slurries of hole sealing device and slurry outlet on top will not flow back.B, part A then are broken through, to reach point in the present invention Segmentation slip casting.To solve the problems, such as that the country rock caused by geological conditions is poor is difficult to supporting, slurry around anchor cable body is realized Homogenization, allows country rock fully to be bonded with slurry, forms an entirety, and it is insufficient scarce to efficiently solve common grouting cable anchor slip casting It falls into, completes the closing of country rock, it is therefore prevented that country rock falls off, while can also realize immediate support.
Embodiment one:
A1 assembles segmented hole sealing device:By interior 11 outs open of stereoplasm bag, nylon sticking belt 12, Buddhist nun is arranged in opening 12 upper end of imperial magic tape is connected with operating rope 8, so that operating rope is pulled open nylon sticking belt 12 8 future, interior stereoplasm bag 11 is put into Chemical grout A, outer stereoplasm bag 10 put into chemical grout B.Interior stereoplasm bag 11 is connected with outer stereoplasm bag 10 by section mode of restricting, and will be grasped Make rope 8 to draw from rope section, can freely operate unaffected.Rope section is tied up between C and B between B and A between reserved area, Make its stabilization, 6 tighter nut of fixed frame is installed, completes the installation of segmented hole sealing device.
A2 seals slurry outlet:Lubricant is coated on sealing of hole plug 7, is blocked in out on B and the slurry outlet of a-quadrant, a-quadrant set On thicker casing 5, B area puts on relatively thin casing 5, ensures its leakproofness.
A3, punching:The drilling 9 that required supporting is got in tunnel has stayed scheduled C, B slip casting region in cable body leading portion Length, and installing segmented hole sealing device simultaneously between C and B and between length that B and A is reserved makes it be fixed on anchor cable 1, The length of operating rope is ensured.
A4, anchoring:Grouting cable anchor is put into drilling 9, the mechanical or resin of this hollow segmented grouting cable anchor is used End is carried out to fix.
A5, slip casting:Pull segmented hole sealing device operating rope 8, carry out region sealing of hole, then carry out slip casting, due to B with 5 thickness of casing of a-quadrant is different, and slurries after the completion of the slip casting of the regions C to first breaking through the casing 5 of B area in the casing for breaking through a-quadrant 5, to ensure that the sequence of C, B, A slip casting is different, wait for grout cures post-reinforcing breaking surrounding rock, improve the complete of breaking surrounding rock structure Property.Reinforce the full length fastening of hollow type grouting cable anchor.
Embodiment two:(second of sealing of hole mode)
B1 assembles segmented hole sealing device:By 0.9~1.3kg/m static expanding agent, flowing shape slurry is tuned into suitable quantity of water Body, outer stereoplasm bag 10 are packed into the slurry that the two mixes, and rope section is tied up between C and B between reserved area, makes it between B and A Stablize, 6 tighter nut of fixed frame is installed, ensure its leakproofness, completes the installation of segmented hole sealing device.
B2 seals slurry outlet:Lubricant is coated on sealing of hole plug 7, is blocked in out on B and the slurry outlet of a-quadrant, a-quadrant set On thicker casing 5, B area puts on relatively thin casing 5, ensures its leakproofness.
B3, punching:The drilling 9 that required supporting is got in tunnel has stayed scheduled C, B slip casting region in cable body leading portion Length, and installing segmented hole sealing device simultaneously between C and B and between length that B and A is reserved makes it be fixed on anchor cable 1, The length of operating rope is ensured.
B4, anchoring:Grouting cable anchor is put into drilling 9, the mechanical or resin of this hollow segmented grouting cable anchor is used End is carried out to fix.
B5, slip casting:After static expanding agent is reacted, sectional area sealing of hole is completed, slip casting is then carried out, due to B and A 5 thickness of casing in region is different, and slurries are breaking through the areas A to the resin glass casing 5 for first breaking through B area after the completion of the slip casting of the regions C The casing 5 in domain is different to ensure the sequence of C, B, A slip casting, waits for grout cures post-reinforcing breaking surrounding rock, improves breaking surrounding rock knot The integrality of structure.Reinforce the full length fastening of hollow type grouting cable anchor.
Embodiment three:
C1, assembling segmented hole sealing device:By interior 11 outs open of stereoplasm bag, nylon sticking belt 12, Buddhist nun is arranged in opening 12 upper end of imperial magic tape is connected with operating rope 8, so that operating rope is pulled open nylon sticking belt 12 8 future, interior stereoplasm bag 11 is put into Chemical grout A, outer stereoplasm bag 10 put into chemical grout B.Interior stereoplasm bag 11 is connected with outer stereoplasm bag 10 by section mode of restricting, and will be grasped Make rope 8 to draw from rope section, can freely operate unaffected.Rope section is tied up between C and B between B and A between reserved area, Make its stabilization, 6 tighter nut of fixed frame is installed, completes the installation of segmented hole sealing device.
C2 seals slurry outlet:Operating rope (steel wire filament) is fastened on 7 top of sealing of hole plug, is blocked in out B and the pulp of a-quadrant Kong Shang ensures its leakproofness.Its 7 length of sealing of hole plug, because the pressure of slip casting can contact to block slurry outlet with drilling 9.
C3, punching:The drilling 9 that required supporting is got in tunnel has stayed scheduled C, B slip casting region in cable body leading portion Length, and installing segmented hole sealing device simultaneously between C and B and between length that B and A is reserved makes it be fixed on anchor cable 1, The length of operating rope is ensured.
C4, anchoring:Grouting cable anchor is put into drilling 9, the mechanical or resin of this hollow segmented grouting cable anchor is used End is carried out to fix.
C5, slip casting:Pull segmented hole sealing device operating rope 8, carry out region sealing of hole, then carry out slip casting, due to B with A-quadrant is blocked by sealing of hole plug 7, so the slip casting in the regions C is first carried out, the operating rope on the sealing of hole plug 7 for pulling B area, due to By shearing force, sealing of hole plug 7 slides the slip casting for carrying out B area, finally pulls the sealing of hole plug 7 of a-quadrant, to ensure that C, B, A are noted The sequence of slurry is different, waits for grout cures post-reinforcing breaking surrounding rock, improves the integrality of breaking surrounding rock structure.Reinforce hollow type slip casting The full length fastening of anchor cable.
Example IV:(second of sealing of hole mode)
D1 assembles segmented hole sealing device:By 0.9~1.3kg/m static expanding agent, flowing shape slurry is tuned into suitable quantity of water Body, outer stereoplasm bag 10 are packed into the slurry that the two mixes, and rope section is tied up between C and B between reserved area, makes it between B and A Stablize, 6 tighter nut of fixed frame is installed, ensure its leakproofness, completes the installation of segmented hole sealing device.
D2 seals slurry outlet:Lubricant is coated on sealing of hole plug 7, is blocked in out on B and the slurry outlet of a-quadrant, a-quadrant set On thicker resin glass casing 5, B area puts on relatively thin casing 5, ensures its leakproofness.
D3, punching:The drilling 9 that required supporting is got in tunnel has stayed scheduled C, B slip casting region in cable body leading portion Length, and installing segmented hole sealing device simultaneously between C and B and between length that B and A is reserved makes it be fixed on anchor cable 1, The length of operating rope is ensured.
D4, anchoring:Grouting cable anchor is put into drilling 9, the mechanical or resin of this hollow segmented grouting cable anchor is used End is carried out to fix.
D5, slip casting:After static expanding agent is reacted, sectional area sealing of hole is completed, slip casting is then carried out, due to B and A Region is blocked by sealing of hole plug 7, so first carry out the slip casting in C regions, the operating rope on the sealing of hole plug 7 for pulling B area, due to by To shearing force, sealing of hole plug 7 slides the slip casting for carrying out B area, the sealing of hole plug 7 of a-quadrant is finally pulled, to ensure C, B, A slip casting Sequence it is different, wait for grout cures post-reinforcing breaking surrounding rock, improve the integrality of breaking surrounding rock structure.Reinforce hollow type slip casting anchor The full length fastening of rope.
The basic principles, main features and advantages of the invention have been shown and described above.The technical staff of the industry should Understand, the present invention is not limited to the above embodiments, and the above embodiments and description only describe the originals of the present invention Reason, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes and improvements It all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appended claims and its equivalent circle It is fixed.

Claims (10)

1. a kind of hollow grouting cable anchor of segmented, including anchor cable ontology, segmented hole sealing device, the anchor cable ontology includes cable body (1), urosome nut (2) and backing plate (3) are equipped with backing plate (3) on the cable body (1), and the side of the backing plate (3) is described Urosome nut (2) is threaded on cable body (1);It is characterized in that:The segmented hole sealing device includes being arranged in the cable body (1) the sealing of hole plug (7) on;Casing (5) is set on the outside of the sealing of hole plug (7), and described sleeve pipe (5) side is set with admittedly Determine frame (6);The inside of the fixed frame (6) is placed with stereoplasm bag.
2. the hollow grouting cable anchor of segmented as described in claim 1, it is characterized in that:The cable body (1) includes steel strand wires and note Slurry pipe;Casing (5) can be plastic bushing or chemical glass casing, have some strength and brittleness;The stereoplasm bag includes outer Stereoplasm bag (10), and the outer stereoplasm bag (10) is internally provided with interior stereoplasm bag (11), and the interior stereoplasm bag (11) with it is described Nylon sticking belt (12) is equipped between outer stereoplasm bag (10);It is connected with operating rope (8) on the nylon sticking belt (12).
3. the hollow grouting cable anchor of segmented as claimed in claim 1 or 2, it is characterized in that:The segmented hole sealing device be one, Two or N number of, cable body (1) is divided into two, three or N+1 region, preferential selection two, three regions, that is, slip casting region A, slip casting Region B and slip casting region C, slip casting region A are cable body (1) tail end to fixed frame (6) top of first hole sealing device, B the Fixed frame (6) top of one hole sealing device to fixed frame (6) top of second hole sealing device, C are second hole sealing device Fixed frame (6) top to cable body (1) front end.
4. the hollow grouting cable anchor of segmented as claimed in claim 3, it is characterized in that:There is the slip casting of perforation in the cable body (1) Hole;It is equipped with slurry outlet at the corresponding cable body of the hole sealing device.
5. the hollow grouting cable anchor of segmented as claimed in claim 4, it is characterized in that:Slurry outlet hole at slip casting the region B and A Diameter is equal, and quantity is identical, and the thickness of the casing at region B and region A is different.
6. claims 1 or 2 or 4 or 5 it is any as described in the hollow grouting cable anchor of segmented, it is characterized in that:It further include control slurry The dynamic pulp mechanism of liquid stream, the pulp mechanism include being mounted on the head cover (25) on the cable body (1) top, and the cable body (1) side wall is equipped with the second through-hole (27);Piston (28) is installed inside second through-hole (27), and the piston (28) by Bellmouth (28a), tail portion (28b), middle part (28c) and head (28d) composition.
7. a kind of application method of the hollow grouting cable anchor of segmented as described in claim 1, it is characterized in that:The application method It include following sealing of hole mode:The static expanding agent of matched doses is put into stereoplasm bag, dosage is 0.9-1.3kg/m or root Dosage is determined according to material character, is tuned into flowing shape slurry with suitable quantity of water, static expanding agent is due to certainly after waiting for one section of reaction time The expansion of body radially generates hole wall the larger bulbs of pressure under the constraint of hole wall, realizes sealing of hole segmentation.
8. a kind of application method of hollow grouting cable anchor of segmented as described in claim 2-6 is any, it is characterized in that:It is described to make Include following sealing of hole mode with method:It, will be chemical in a cylindrical outer interior stereoplasm bag (11) of stereoplasm bag (10) inner sleeve one Slurries A is placed in interior stereoplasm bag (11), and chemical grout B is placed in outer stereoplasm bag (10);Interior stereoplasm bag side wall is equipped with opening, Opening is sealed with nylon sticking belt (12), and there is operating rope (8) in system at nylon sticking belt (12) upper port;Pull operation rope (8) To pull open nylon sticking belt (12), the chemical grout A of containing is made to pass through in pulling and the outer stereoplasm bag (10) of operating rope (8) Chemical grout B mixing, to realize expansion segmentation sealing of hole.
9. a kind of application method of the hollow grouting cable anchor of segmented as claimed in claim 8, it is characterized in that:The sealing of hole mode Pulp mode be:The fixed frame (6) is divided into two parts, and aperture on the upside of fixed frame (6) is passed through by two or more screws, It is preferential to choose two, it is fixed on cable body (1) by nut preload, the outer stereoplasm bag (10) is fixed on cable body by knot (1) on, fixed frame (6) outer wall is that transparent plastic ensures stereoplasm bag in cable body (1) anchoring procedure not by the rock failure mechanism of rock, the envelope The a diameter of 6mm of stopple (7) makes the appropriate adjustments according to anchor cable structure, with the mating steady conjunction of slurry outlet, there is lubrication between the two;Slurry outlet Interval 150mm makes the appropriate adjustments according to anchor cable structure, and slurry outlet is only below the segmented hole sealing device that cable body (1) is installed It is equipped with, slurry outlet is not provided in every level-one end 1000mm or according to the anchor cable structure place of making the appropriate adjustments;The resin glass set Pipe (5) is hollow, and diameter is more than cable body (1) diameter, and installation to cable body (1) pulp bore region, length covering is per level-one slurry outlet area Domain makes it not slide up and down with sealing of hole plug (7) cooperation;The resin glass casing (5) is only installed in region B and region A, and area Resin glass casing (5) thickness of domain A installations is more than the thickness of region B installations;The pressure that guarantee B, region A pulps are broken through is not Together.
10. a kind of application method of the hollow grouting cable anchor of segmented as claimed in claim 8, it is characterized in that:The sealing of hole side The pulp mode of formula is:The fixed frame (6) is divided into two parts, and two screws pass through aperture on the upside of fixed frame (6), pass through nut Preload is fixed on cable body (1), and the outer stereoplasm bag (10) is fixed on by knot on cable body (1), and fixed frame (6) outer wall is Bright plastics ensure stereoplasm bag in cable body (1) anchoring procedure not by the rock failure mechanism of rock, a diameter of 6mm of the sealing of hole plug (7) or according to Anchor cable structure does adjustment appropriate, with the mating steady conjunction of slurry outlet, there is lubrication between the two;Slurry outlet interval 150mm or according to anchor cable Structure does adjustment appropriate, and slurry outlet is only equipped with below the segmented hole sealing device that cable body (1) is installed, in every level-one end 1000mm does according to anchor cable structure and is not provided with slurry outlet at adjustment appropriate;Operating rope (8) is fastened in sealing of hole plug (7) upper end, The operating rope of region A, B and C all sealing of hole plugs finally rotates to be a rope;When pullling operating rope downwards, whole section of slurry outlet The sealing of hole plug (7) in domain is all pulled off.
CN201810764089.7A 2018-07-12 2018-07-12 A kind of hollow grouting cable anchor of segmented and application method Pending CN108756970A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109441510A (en) * 2018-12-28 2019-03-08 常州工学院 A kind of impact tunnel segmentation anchoring anchor cable
CN109798140A (en) * 2019-02-21 2019-05-24 平顶山天安煤业股份有限公司六矿 Km Deep Soft Rock fracture grouting support reinforcement method
CN110388223A (en) * 2019-08-21 2019-10-29 中国矿业大学 A kind of hollow grouting cable anchor and application method of segmented slip casting
CN110608062A (en) * 2019-10-09 2019-12-24 中国矿业大学 Multi-section hollow grouting anchor cable and supporting method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109441510A (en) * 2018-12-28 2019-03-08 常州工学院 A kind of impact tunnel segmentation anchoring anchor cable
CN109798140A (en) * 2019-02-21 2019-05-24 平顶山天安煤业股份有限公司六矿 Km Deep Soft Rock fracture grouting support reinforcement method
CN109798140B (en) * 2019-02-21 2020-12-18 平顶山天安煤业股份有限公司 Splitting grouting reinforcement support method for kilometer deep well soft rock
CN110388223A (en) * 2019-08-21 2019-10-29 中国矿业大学 A kind of hollow grouting cable anchor and application method of segmented slip casting
CN110388223B (en) * 2019-08-21 2020-09-08 中国矿业大学 Sectional grouting hollow grouting anchor cable and use method thereof
CN110608062A (en) * 2019-10-09 2019-12-24 中国矿业大学 Multi-section hollow grouting anchor cable and supporting method

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