CN110185484A - The combined anchor device and construction method that tunnel wall rock deformation quickly controls - Google Patents
The combined anchor device and construction method that tunnel wall rock deformation quickly controls Download PDFInfo
- Publication number
- CN110185484A CN110185484A CN201910380003.5A CN201910380003A CN110185484A CN 110185484 A CN110185484 A CN 110185484A CN 201910380003 A CN201910380003 A CN 201910380003A CN 110185484 A CN110185484 A CN 110185484A
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- anchor
- rod piece
- hole
- block
- slip casting
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- 239000011435 rock Substances 0.000 title claims abstract description 107
- 238000010276 construction Methods 0.000 title abstract description 24
- 238000007569 slipcasting Methods 0.000 claims abstract description 82
- 239000002002 slurry Substances 0.000 claims abstract description 53
- 230000008093 supporting effect Effects 0.000 claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 52
- 239000010959 steel Substances 0.000 claims description 52
- 238000005553 drilling Methods 0.000 claims description 33
- 239000012528 membrane Substances 0.000 claims description 28
- 238000004873 anchoring Methods 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 15
- 230000002787 reinforcement Effects 0.000 claims description 15
- 239000011440 grout Substances 0.000 claims description 10
- 230000008901 benefit Effects 0.000 claims description 6
- 239000011083 cement mortar Substances 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 5
- 238000003780 insertion Methods 0.000 claims description 4
- 230000037431 insertion Effects 0.000 claims description 4
- BVPWJMCABCPUQY-UHFFFAOYSA-N 4-amino-5-chloro-2-methoxy-N-[1-(phenylmethyl)-4-piperidinyl]benzamide Chemical compound COC1=CC(N)=C(Cl)C=C1C(=O)NC1CCN(CC=2C=CC=CC=2)CC1 BVPWJMCABCPUQY-UHFFFAOYSA-N 0.000 claims description 3
- BCAARMUWIRURQS-UHFFFAOYSA-N dicalcium;oxocalcium;silicate Chemical compound [Ca+2].[Ca+2].[Ca]=O.[O-][Si]([O-])([O-])[O-] BCAARMUWIRURQS-UHFFFAOYSA-N 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 230000009172 bursting Effects 0.000 claims description 2
- 239000003292 glue Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 7
- 230000011218 segmentation Effects 0.000 description 6
- 239000000843 powder Substances 0.000 description 5
- 238000009434 installation Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 229920002472 Starch Polymers 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 235000019698 starch Nutrition 0.000 description 2
- 239000008107 starch Substances 0.000 description 2
- 229910001341 Crude steel Inorganic materials 0.000 description 1
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000013536 elastomeric material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 230000008450 motivation Effects 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 210000004911 serous fluid Anatomy 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000009955 starching Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- 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
- E21D20/028—Devices or accesories for injecting a grouting liquid in a bore-hole
-
- 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
- E21D21/0006—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by the bolt material
-
- 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
-
- 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
- E21D21/0086—Bearing plates
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention belongs to technical field of tunnel construction, disclosing a kind of combined anchor device that tunnel wall rock deformation quickly controls and construction method, the device includes anchor pole rod piece, the fixed device of rod end, slip casting rod piece, rod piece nested arrangement and mechanical anchor head；Anchor pole rod piece is coaxial with slip casting rod piece and is sleeved on outside slip casting rod piece；The both ends of anchor pole rod piece are respectively arranged with mechanical anchor head and the fixed device of rod end；One end of slip casting rod piece is stretched out from the fixed device of rod end, and the other end is placed in inside mechanical anchor head；The end of slip casting rod piece is provided with injected hole；It is provided on mechanical anchor head and injected hole connects on slip casting rod piece slurry outlet；Rod piece nested arrangement is sleeved on outside anchor pole rod piece.The present invention is designed by mechanical anchor, segmenting slip casting, is realized the quick accurate control of surrouding rock deformation, is enhanced the reliability of supporting, reduce construction cost.
Description
Technical field
The invention belongs to technical field of tunnel construction, it is related to a kind of combined anchor device and construction method, more particularly to
A kind of combined anchor device that tunnel wall rock deformation quickly controls and construction method.
Background technique
As tunnels and underground engineering construction scale is increasingly huge, inevitably encounter complicated geology location, buried depth it is excessive,
The regions such as stress is huge, rock mass is weak, the bearing capacity of country rock is low after tunnel excavation, the excessive velocities of surrouding rock deformation, excessive,
Easily form tunnel unstability cave-in accident.
Anchor pole deformation controlling for rock surrounding gateways is applied in constructing tunnel, and the globality of country rock is improved in conjunction with slip casting, it has also become
Important link in constructing tunnel support technology.According to " vcehicular tunnel design specification " (JTG D70/2-2014), " railway tunnel
Design specification " (TB 10003-2016) etc., because anchoring force request is low, construction machinery is easy, crude steel is generally used in Tunnel Design
Muscle anchor pole can classify to it by form of construction work and force way to carry out anchoring support.
Anchor pole is commonly used according to the form of construction work of anchor pole, in tunnel can be divided into grouting rock bolt, early strong powder stick anchor pole, friction-type anchor
Bar, expansion sleeve bolt, hollow automatic anchor pole etc., above-mentioned anchor pole respectively has its advantage, but its limitation is individually present, such as: sand
Starch that anchor bolt construction is easy, and shear resistance and anchor force are stronger, but there is condensation supportings excessively slowly, can not apply prestressing force and
It is difficult to control the limitations such as country rock rapid deformation；Early strong powder stick anchor pole relies on fast solidifying powder stick that can quickly form anchor force, but because of medicine
It is easy to run off after volume stirring, slurries plumpness is difficult to ensure that anchorage reliability is bad；Friction rock bolt is bored by hydraulic pressure or certainly
The modes such as extruding make bar wall be close to palisades and form quick frictional resistance supporting, but hard to work for broken rock；Expansion shell type anchor
Bar is opened with hole wall friction by anchor head to provide immediate support, it also requires good rock stratum, and anchor head is perishable and occur
Failure phenomenon；Hollow automatic anchor pole can be realized to carry out from brill is synchronous with slip casting, and is needed in broken rock using the fast of overall length
Solidifying slurries, construction cost are difficult to control.
According to the force way of anchor pole, the anchor pole that constructing tunnel uses can be divided into end anchor type anchor pole and overall length binding type anchor again
Bar: end anchor type anchor pole is fixed by the quick cohesive force of end anchor block or end, can be applied initial tensioning force to country rock and be enclosed with controlling
Rock loosens deformation, while can provide deformation space for free segment in the middle part of rod piece for the country rock of large deformation；But in surrouding rock deformation condition
When too fast, excessive, there is the changing of the relative positions under rock stratum is easy, shear action is formed to anchor pole, and the accumulation of wall rock loosening deformation is to end anchor
Gu section easily forms stress concentration, and anchor pole is caused to fail.Overall length binding type anchor pole can improve anchor pole because anchor pole is wrapped up by slurries
Stress condition provides higher shear resistance and tensile strength relative to end anchor type, but when using cement grout, due to slurries
Setting time is longer, and During Initial Stage Construction can not form effective support, it is difficult to the case where coping with the too fast deformation of country rock and emergency rescue；And
Using when gazing at pulp material fastly, not only operating expenses increases severely body of rod overall length, and certain prearrangement of deformation amount can not be provided to country rock, with
The self-bearing ability for playing country rock, anchor pole deformed in tension easily leads to anchoring material cracking after too fast solidification, and economy and safety are all
It has a greatly reduced quality.
It can thus be seen that traditional anchor pole is more single for ground adaptability, Tunnel Engineering geology item can not be adapted to
The changeable situation of part, while anchor structure lacks the design concept of segmenting slip casting, segmentation anchoring.Therefore engineers and technicians are directed to work
Journey field condition has carried out numerous corrective measures to anchor structure and form of construction work, proposes a variety of segmenting slip casting anchor structures.
Wherein than more typical as Wu Dexing proposes a kind of anchor rod support method and its sectional hollow slip anchor rod (patent No. ZL
02112233.4), by the combination of the solid body of rod and hollow lever, and the structures such as slurry-blocking device, centralizer are combined, enhances anchor pole
Adaptability, be applicable to the quick supporting of weak broken rock stratum, and can be applied in good rock stratum.But this device there are still
Part limitation is such as difficult to ensure integrality and the end of anchoring body as early strong anchoring body using powder stick when wall-rock crack is more
Portion's anchoring effect；Slurry-blocking device plugging effect is not good enough when hole wall irregularity, and the plumpness of powder stick slurries is difficult to control；The rod piece of merogenesis
There are stress to concentrate weak spot for junction.The segmentation that Zhang Yannian etc. proposes a kind of segmenting slip casting that band stops slurry connection sleeve is hollow
Grouted anchor bar (number of patent application is 201810704903.6) is, it can be achieved that segmenting slip casting, segmentation are only starched and the slurries of segmentation are strong
Degree design, grouting serous fluid is more closely knit, but anchor pole equally uses merogenesis to connect, and affects anchor there are stress concentration point between bar
Bar stressed effect；And this structure slip casting is difficult to control slurry diversion, and the slurries of varying strength design easily mix and influence slip casting
Effect.
Therefore, the surrouding rock deformation under a kind of achievable different geological conditions is developed quickly to control, anchor and slip casting reliability
Anchor structure and its form of construction work good, cost is controllable, the tunnel construction having become under complex geological condition are badly in need of.
Summary of the invention
For the deficiency of above-mentioned background technique, the present invention proposes that a kind of surrouding rock deformation that can be achieved in the case of different geology is fast
Speed segmentation anchoring can guarantee the group that the tunnel wall rock deformation of anchor rod anchored reliability and controllable construction cost quickly controls
Box-like anchor rod device and construction method.
To achieve the above object, the present invention adopts the following technical scheme:
A kind of combined anchor device that tunnel wall rock deformation quickly controls, the group that the tunnel wall rock deformation quickly controls
Box-like anchor rod device includes anchor pole rod piece for providing the frictional resistance anchoring support of stretch-draw anchor supporting and overall length, for fixing anchor
Bar starting point is to control the fixed device of the convergent rod end of country rock, for fast anchor section slip casting and transmit the slip casting bar of anchoring extruding force
Part, for slip casting subregion, the centering of anchor pole rod piece and reinforcement section slip casting rod piece nested arrangement and be used for mechanical anchor anchor pole tail
End is to provide the mechanical anchor head of initial anchor force；The anchor pole rod piece is coaxial with slip casting rod piece and is sleeved on outside slip casting rod piece；
The both ends of the anchor pole rod piece are respectively arranged with mechanical anchor head and the fixed device of rod end；One end of the slip casting rod piece is from bar
It holds and is stretched out on fixed device, the other end is placed in inside mechanical anchor head；The end of the slip casting rod piece is provided with injected hole；The machine
It is provided on tool anchor head and injected hole connects on slip casting rod piece slurry outlet；The rod piece nested arrangement is sleeved on anchor pole rod piece
It is external.
Preferably, the middle through-hole being axially provided on anchor pole rod piece provided by the present invention along anchor pole rod piece；It is described
Slip casting rod piece protrudes into middle through-hole and coaxial with middle through-hole；The outer surface of the anchor pole rod piece be provided with coarse-pitch thread rod segment with
And fine thread rod segment；The machinery anchor head is screwed in coarse-pitch thread rod segment；The fixed device of the rod end is screwed in fine thread rod segment
On.
Preferably, the fixed device of rod end provided by the present invention include anchor plate, elastic anchor block, anchor pole rod end nut with
And stop grouting plug；The anchor pole rod piece sequentially passes through stop grouting plug and anchor plate；The anchor pole rod end nut driving is in fine thread bar
Duan Shang；Flexible anchor block is set between the anchor pole rod end nut and anchor plate.
Preferably, elasticity anchor block provided by the present invention is integrally in dish；Through hole is provided on the elasticity anchor block；
The through hole inner wall is provided with and screw thread matches in fine thread rod segment internal screw thread；The elasticity anchor block is screwed in fine thread
It is placed in rod segment between anchor pole rod end nut and anchor plate.
Preferably, slip casting rod piece provided by the present invention includes hollow steel tube, squeezes pushing block and pipe end nut；
The anchor pole rod piece is coaxial with hollow steel tube and is sleeved on outside hollow steel tube；The hollow steel tube can be along the axial direction of anchor pole rod piece
It is mobile；One end of the hollow steel tube is connected after stretching out from the fixed device of rod end with pipe end nut, and the other end is from anchor pole
Rod piece is connected after stretching out with extruding pushing block；The extruding pushing block is placed in inside mechanical anchor head；The outer diameter for squeezing pushing block is little
Outer diameter in anchor pole rod piece and the outer diameter greater than middle through-hole；It is provided on the extruding pushing block and slurry outlet phase on mechanical anchor head
The pushing block slurry outlet of perforation；The outer surface for squeezing pushing block is in contact with mechanical anchor head inner surface is pushed；The extruding pushing block
Mechanical anchor head is pushed to be held in drilling hole to be anchored under external force.
Preferably, extruding pushing block provided by the present invention is integrally round table-like；It is described squeeze pushing block frustum cone side with push away
Motivation tool anchor head inner surface is in contact；The axially inner face of the pipe end nut is variable diameter；The pipe end nut
It is finally threadedly coupled with the fine thread rod segment on anchor pole rod piece after hollow steel tube end part screw-in.
Preferably, machinery anchor head provided by the present invention includes anchor head nesting section, rounded head and embedding rock anchor block；It is described
Anchor head nesting section is screwed in coarse-pitch thread rod segment；The rounded head is arranged in anchor head nesting section end；It is arranged in the rounded head
There is rounded head slurry outlet；The rounded head slurry outlet connects with pushing block slurry outlet；Along anchor head nesting in the anchor head nesting section
Section has been arranged radially nested section piston hole；The embedding rock anchor block is placed in nested section piston hole；It is described nesting section piston hole be
Multiple, multiple nesting section piston holes are evenly arranged on anchor head nesting section radially；The frustum cone side for squeezing pushing block and embedding rock anchor
The inner surface of block is in contact；The extruding pushing block pushes embedding rock anchor block to stretch out from nested section piston hole and most under external force
It is held in drilling hole to be anchored eventually.
Preferably, embedding rock anchor block provided by the present invention is integrally trapezoidal bloom, the outer most edge of the embedding rock anchor block is set
Be equipped with anchor block steel-tooth, the medial surface of the embedding rock anchor block is prismatoid inclined-plane, the shape of the frustum cone side for squeezing pushing block with
The shape of the medial surface of embedding rock anchor block matches.
Preferably, rod piece nested arrangement provided by the present invention includes Rubber membrane cover and pvc pipe；The Rubber membrane cover
It is the closing abrasive rubber annulus surrounding outside anchor pole rod piece；The pvc pipe is placed in outside anchor pole rod piece and with anchor pole rod piece simultaneously
Row；One end of the pvc pipe connects with Rubber membrane cover, and the other end is pierced by from the fixed device of rod end.
A kind of rapid constructing method of the combined anchor device quickly controlled based on foregoing tunnel wall rock deformation,
It the described method comprises the following steps:
1) drilling, borehole cleaning: the drilling hole of appropriate length is cut using drilling machine, and uses the cleaning of high pressure water flow
Remaining clast in hole；
2) anchor pole assembles: by slip casting rod piece from the middle through-hole of tail end insertion anchor pole rod piece, embedding rock anchor block being embedded in anchor head
After the nested section piston hole of nested section, anchor head nesting section is anchored in coarse-pitch thread rod segment by screw thread integral-rotation；From anchor pole
Rubber membrane cover and the corresponding pvc pipe of connection are inserted in rod piece front end, suitably inflate and smearing alite paste is pasted onto Rubber membrane cover slightly
The design position of screw thread rod segment；Stop grouting plug, anchor plate, high-strength elastic anchor block, anchor pole are successively inserted in from the end of fine thread rod segment
Rod end nut, while pvc pipe is sequentially passed through into stop grouting plug preformed hole and anchor plate preformed hole, it is finally completed combined anchor device
Overall package；
3) inserted link: assembled combined anchor device is inserted into the drilling hole cleared up, to rubber membrane from pvc pipe
It is pressed into air in set, expands Rubber membrane cover, until fitting closely with the hole wall of drilling hole, anchor pole rod piece is made to be clamped in hole
Center, and it is the slip casting region of fast anchor section and reinforcement section is completely isolated；The fixed device of rod end is pushed and is tightened in simultaneously
The aperture of drilling hole, completes inserted link process；
4) mechanical anchor: pipe end nut is screwed in the pipe end of the steel pipe nose threads of hollow steel tube, then using artificial
Or mechanical system, the hollow steel tube pipe end of prominent anchor pole rod piece middle through-hole is hammered, hammer force is transferred to extruding through hollow steel tube
Pushing block squeezes pushing block side wall with the medial slope of embedding rock anchor block and contacts and transmit pressure, so that embedding rock under the support of rounded head
Anchor block is along nested section piston hole compressional movement outward；Repeatedly after hammering, so that the anchor block steel-tooth of embedding rock anchor block is embedded in hole wall, dimension
The forward extruding force of hammering device is held, and rapidly by pipe end nut driving to anchor pole Rod end, made big straight on the inside of it
Caliber inner screw thread section is connect with the fine thread rod segment of anchor pole rod piece, and the steel pipe nose threads of minor diameter internal screw thread and hollow steel tube connect
It connects, extrusion stress is locked in inside hollow steel tube whereby, and then keep the mechanical presses power of embedding rock anchor block, keep mechanical anchor head tight
Tight build-in is in hole palisades；
5) initial pre- tensioning: pulling anchor pole rod piece, after confirming that mechanical anchor head generates initial mechanical anchor force, by stop grouting plug card
Tightly in aperture, aperture is blocked by its elasticity, and anchor plate is laid in drilling hole hole mouth, and further use drawbench
Tool applies initial tensioning force to design value to anchor pole rod piece, at the same successively by high-strength elastic anchor block and anchor pole rod end nut tightening in
It is close on rear side of anchor plate and therewith, rod end stretching force is locked, so that the deformation of country rock is tentatively controlled；
6) fast anchor section slip casting: using slip casting machinery inject into slip casting rod piece it is fast it is solidifying anchor slurries, during slurries pass sequentially through
Empty steel pipe, pushing block slurry outlet flow into inside mechanical anchor head, and the fast anchor of drilling hole is further flowed by rounded head slurry outlet
The crack of hole wall is completely filled out until when high pressure slurries are difficult to inject when coagulate slurries fastly, blocks slip casting rod piece tail end by section；
7) two times tensioning: in fast anchor section grout cures and after generating bolting force, using drawing machinery again to anchor pole
Rod piece applies two times tensioning power to design value, and high-strength elastic anchor block and anchor pole rod end nut are successively screwed to lock stretching force；
8) after surrouding rock deformation obtains tentatively control, pvc pipe reinforcement section slip casting: is passed through to rubber membrane from extraneous supercharging equipment
It is persistently pressed into air in set, is pressurized closed Rubber membrane cover constantly until bursting, then inject into reinforcement section slowly by pvc pipe
The cement mortar of solidifying microdilatancy, until grouting pressure increases sharply and is difficult to be pressed into or cement mortar is from anchor plate preformed hole
It overflows, waits grout cures, be finally completed entire anchor bolt grouting process.
The invention has the advantages that
The present invention provides a kind of combined anchor structure and construction method that tunnel wall rock deformation quickly controls, the tunnels
The combined anchor device that surrouding rock deformation quickly controls includes for providing the frictional resistance anchoring support of stretch-draw anchor supporting and overall length
Anchor pole rod piece, for fixing anchor bar starting point to control the fixed device of the convergent rod end of country rock, for fast anchor section slip casting and pass
Pass anchoring extruding force slip casting rod piece, for slip casting subregion, the centering of anchor pole rod piece and reinforcement section slip casting rod piece nested arrangement with
And for mechanical anchor end of anchor rod to provide the mechanical anchor head of initial anchor force；Anchor pole rod piece is coaxial with slip casting rod piece and is set with
Outside slip casting rod piece；The both ends of anchor pole rod piece are respectively arranged with mechanical anchor head and the fixed device of rod end；Slip casting rod piece
One end is stretched out from the fixed device of rod end, and the other end is placed in inside mechanical anchor head；The end of slip casting rod piece is provided with injected hole；Machine
It is provided on tool anchor head and injected hole connects on slip casting rod piece slurry outlet；Rod piece nested arrangement is sleeved on outside anchor pole rod piece
Portion.The present invention solves the anchor pole adaptability problem that tunnel wall rock deformation controls under complex geological condition, proposes a kind of novel
Combined anchor device, by mechanical anchor, segmenting slip casting design, realize the quick accurate control of surrouding rock deformation, enhance
The reliability of supporting, reduces construction cost.Specifically, present invention has the advantage that using mechanical embedding rock anchor it is solid and
The mode that slip casting bond-anchorage combines, and two stage prestressing force is provided, it can be achieved that in constructing tunnel surrouding rock deformation it is fast
Fast accurate control.The mechanical embeddable palisades of anchor head assembly designed by the present invention, under all kinds of complex geological conditions, after inserted link
Anchor force can be quickly formed, applicability is wider.Connectionless component in the middle part of the coarse-pitch thread anchor rod body that the present invention uses, relative to it
He has more globality by segmenting slip casting anchor structure, is not in stress concentration phenomenon, anti-pulling ability is stronger.The present invention uses
Inflatable Rubber membrane cover fitted closely with hole wall, fast anchor section can be made completely enclosed, and form certain grouting pressure, prevent from starching
Liquid stream is lost, and slip casting plumpness is improved；And rock cranny caused by mechanical anchor can have been filled up, it ensure that fast anchor section bond-anchorage
Reliability.Segmentation anchor bolt grouting system can required design the anchoring slurry intensity, grout cures speed and the anchoring that are respectively segmented
Segment length, combines the anchor pole advantage of mechanical anchor, the anchoring of end viscosity, the anchoring of overall length viscosity, and overcomes conventional anchor
Limitation, and install simply, construction cost is controllable.
Detailed description of the invention
Below in conjunction with the example diagram in the embodiment of the present invention, the technical solution of the embodiment of the present invention is carried out clear, complete
Ground description, it should be apparent that, the accompanying drawings in the following description is only a part of the embodiments of the present invention, rather than whole implementation
Example.Based on the embodiments of the present invention, those of ordinary skill in the art is obtained without making creative work
All embodiments are obtained, shall fall within the protection scope of the present invention.
Fig. 1 is the whole vertical section schematic diagram of combined anchor device provided by the present invention；
Fig. 2 is the anchor pole rod piece schematic detail view of combined anchor device provided by the present invention；
Fig. 3 is the vertical section schematic detail view of the fixed device of rod end of the present invention；
Fig. 4 is the vertical view schematic detail view of the fixed device of rod end of the present invention；
Fig. 5 is the detail drawing signal of slip casting rod piece of the present invention；
Fig. 6 is the cross section schematic detail view of nested arrangement between bar of the present invention；
Fig. 7 is the vertical section schematic detail view of mechanical anchor head of the present invention；
Fig. 8 is the machinery cross section anchor head I-I of the present invention schematic detail view；
Fig. 9 is the machinery cross section anchor head II-II of the present invention schematic detail view.
In figure:
1- anchor pole rod piece, 11- coarse-pitch thread rod segment, 12- fine thread rod segment, 13- middle through-hole；2- rod end fixes device, 21-
Anchor plate, 211- anchor plate preformed hole, 22- high-strength elastic anchor be fast, 23- anchor pole rod end nut, 24- stop grouting plug, 241- stop grouting plug
Preformed hole；3- slip casting rod piece, 31- hollow steel tube, 311- steel pipe nose threads, 32- squeeze pushing block, 321- pushing block slurry outlet, 33-
Pipe end nut；Nested arrangement, 41- Rubber membrane cover, 42-PVC pipe between 4- bar；5- machinery anchor head, 51- anchor head nesting section,
511- nesting section piston hole, 52- rounded head, 521- rounded head slurry outlet, the embedding rock anchor block of 53-, 531- anchor block steel-tooth；6- drilling hole
Hole, the fast anchor section of 61-, 62- reinforcement section；7- country rock.
Specific embodiment
In the following, embodiments of the present invention are described in further detail with reference to the drawings and specific embodiments but not as this
The restriction of invention.
In the description of the present invention, it should be noted that the instruction such as term "left", "right", "upper", "lower", "bottom" " preceding "
Orientation or positional relationship be based on the orientation or positional relationship shown in the drawings, it is only for convenient for description the present invention and simplify
Description, rather than refer in particular to or imply that signified element must have specific orientation, be constructed and operated in a specific orientation, therefore not
It can be interpreted as limitation of the present invention.
Such as Fig. 1, a kind of combined anchor device that tunnel wall rock deformation quickly controls, comprising: anchor pole rod piece 1, for mentioning
For stretch-draw anchor supporting and the frictional resistance anchoring support of overall length；Rod end fixes device 2, for fixing anchor bar starting point to control country rock
Convergence；Slip casting rod piece 3 for fast anchor section slip casting and transmits anchoring extruding force；Rod piece nested arrangement 4 is used for slip casting subregion, rod piece
Centering and reinforcement section slip casting；Mechanical anchor head 5, initial anchor force is provided for mechanical anchor end of anchor rod.
Such as Fig. 1,2, anchor pole rod piece 1 is made by high-strength large-diameter coarse-pitch thread steel, including coarse-pitch thread rod segment 11, fine thread rod segment
12, middle through-hole 13.Big spacing coarse-pitch thread is distributed on the outside of coarse-pitch thread rod segment 11, tail end end and mechanical anchor head 5 are through thick spiral shell
Line is directly connected to, and is provided mechanical anchoring force, is directly contacted in the middle part of rod segment with anchoring slurries, is acted on generation supporting by cohesive force and rubbed
Resistance.Fine thread rod segment 12 is located at the front end of the body of rod, and outside is small spacing fine thread, can connect with the fixed device 2 of rod end, for solid
Determine anchor pole forward end and stretching force is provided.Through there is middle through-hole 13 in the middle part of anchor pole rod piece 1, slip casting rod piece 3 can be inserted into hole,
It to inject solidifying slurries fastly, and can be the mechanical transmitting of anchor head 5 anchoring thrust.
As shown in Fig. 1,3,4, the fixed device 2 of rod end is by anchor plate 21, elastic anchor block 22, anchor pole rod end nut 23, only slurry
24 composition of plug.Anchor plate 21 is elastomeric material, and in disk-shaped, anchor pole rod piece 1 is run through at middle part, is layed in drilling hole 6
Aperture, for closing hole and providing smooth stress surface for high-strength elastic anchor block 22；It is reserved that anchor plate is carved on anchor plate 21
Hole 211 can penetrate pvc pipe 42.High-strength elastic anchor block 22 is made of high-intensitive elastic rubber, in dish, is laid on anchor
On backing plate 21；Centre is run through by anchor pole rod piece 1, and the inner wall of through hole is provided with internal screw thread, can be tightened in fine thread rod segment 12 simultaneously
It is bonded anchor plate 21, to fixing anchor bar and provides pre- stretch-draw anchor power；The center of high-strength elastic anchor block 22 and anchor plate be not straight
Contact, for the anchor pole rod piece 1 after anchoring, there are certain distortion allowances.Anchor pole rod end nut 23 is hex nut, internal diameter
It is identical as the outer diameter of fine thread rod segment 12, it can be tightened in the tail end of fine thread rod segment 12, and be close to high-strength elastic anchor block 22, to
Anchor pole is locked, prevents that anchor block 22 is caused to generate excessive flexible deformation because stretching force is excessive, is threadedly coupled disengaging with anchor rod body 1,
Rod end anchorage effect is caused to fail.Stop grouting plug 24 is made of the preferably cylinder-shaped elastic block rubber of swell-shrink characteristic, in upward slip casting,
The aperture for the hole 6 that drills can be blocked completely, mortar leakage prevention；Stop grouting plug preformed hole 241 is provided on stop grouting plug 24, with anchor plate
Preformed hole 211 connects, to be inserted into pvc pipe 42.
As shown in Figure 1,5, slip casting rod piece 3 includes hollow steel tube 31, squeezes pushing block 32, pipe end nut 33.Cored steel
Pipe 31 is made of high-strength steel, and tube wall is thicker, and intensity is high, can bear certain impact force, outer diameter is slightly less than anchor pole rod piece 1
Middle through-hole 13, can push front and back wherein, be used to conduct the slurries of fast solidifying section 61 early period, the later period pushes embedding rock for conducting
The hammering extruding force of anchor block 53；The front end of hollow steel tube 31 is provided with steel pipe nose threads 311, can joint steel pipe pipe end nut 33
To fix slip casting rod piece 3 and lock extruding force.Pushing block 32 is squeezed to be made by high-strength alloy, it is in a circular table shape, it is fastenedly connected in hollow
The tail end of steel pipe 31, under hammer force effect, the frustum cone side for squeezing pushing block 32 can be contacted directly with the extruding of embedding rock anchor block 53, be pushed away
Move the outside Slideslip of embedding rock anchor block 53；It squeezes and is provided with pushing block slurry outlet 321 in the middle part of pushing block 32, to transmit anchoring slurries to machine
At tool anchor head 5.Pipe end nut 33 is the long hex nut that special internal diameter changes, the outer diameter of one end and hollow steel tube 31
It is identical, steel pipe nose threads 311 can be tightened in；The other end is identical as 1 outer diameter of anchor pole rod piece, can be tightened in fine thread rod segment 12.
After pipe end nut 33 is connect with the tail end of anchor pole rod piece 1 and slip casting rod piece 3, the extruding force of hollow steel tube 31 can be locked
It is fixed.
As a shown in Figure 6, nested arrangement 4 is made of Rubber membrane cover 41 and pvc pipe 42 between bar.Rubber membrane cover 41 is around anchor
One ring seal abrasive rubber annulus of bar rod piece 1, inside are pasted on the middle part of anchor pole rod piece 1, are in closed state, only pass through PVC
Pipe 42 inputs gas, may expand after inflation and comes and be close to drill hole 6 and 1 side wall of hole wall and anchor pole rod piece, by anchor pole rod piece 1
It is clamped in the center of drilling hole 6, and the domain section of hole can be blocked, to make to infuse between fast anchor section 61 and reinforcement section 62
It is completely isolated to starch region, ensure that grouting quality.Pvc pipe 42 is bored from anchor plate preformed hole 211 and the insertion of stop grouting plug preformed hole 241
Hole hole 6 is connected and is penetrated in Rubber membrane cover 41, and early period can adjust its breathing state, later period to 41 inner inflatable of Rubber membrane cover
It can be used for transmitting the cement grout of slow hardening microdilatancy to reinforcement section 62.
As shown in Fig. 1,7,8,9, mechanical anchor head 5 is located at the tail end of anchor pole rod piece 1, by anchor head nesting section 51, rounded head 52,
Embedding rock anchor block 53 forms.Wherein anchor head nesting section 51 is the thick cyclinder of steel, and cylinder inner wall is provided with major diameter coarse-pitch thread, can
It screws and is fastenedly connected with the coarse-pitch thread on the outside of 1 rod end of anchor rod body；Anchor head nesting section 51 cuts rectangular nested section piston hole
511, port size is identical as embedding 53 outer profile size of rock anchor block, extends outwardly activity convenient for embedding rock anchor block 53.Rounded head 52 is adopted
It is made of high-strength steel, section 51 nested with anchor head is welded, can be with the most inner side palisades of drilling hole 6 during mechanical anchor
Contact is with support force needed for providing anchor rod device；It is carved with rounded head slurry outlet 521 inside rounded head 52, can will guide mechanical anchor
In fast solidifying slurries injection hole hole 6 in first 5, the quick anchoring of the fast anchor section 61 of hole is realized.Embedding rock anchor block 53 is trapezoidal steel
Anchor block steel-tooth 531 is distributed in block, lateral surface, and medial surface is prismatoid inclined-plane, and squeezing, the prismatoid on the inside of the promotion of pushing block 32 is oblique
When face, embedding rock anchor block 53 can be squeezed by the movement in nested section piston hole 11 from inside to outside sidetracking hole hole 6, make anchor block steel-tooth 531
Be embedded in palisades, thus make mechanical anchor head 5 be anchored in drilling hole 6 bottom.
A kind of combined anchor device that tunnel wall rock deformation quickly controls and construction method, operating procedure include the following:
1) drilling, borehole cleaning: the drilling hole 6 of appropriate length is cut using drilling machine, and uses the clear of high pressure water flow
Manage remaining clast in hole.
2) anchor pole assembles: firstly, by slip casting rod piece 3 from the middle through-hole 13 of tail end insertion anchor pole rod piece 1, in embedding rock anchor block
53 coating lubricating oils and after being embedded in the nested section piston hole 511 of anchor head nesting section 51, mechanical anchor head 5 is integrally revolved by screw thread
Turn the tail end for being anchored on anchor pole rod piece 5, realizes the installation of the mechanical anchor head 5 of combined anchor.Secondly, from 1 front end of anchor pole rod piece
It is inserted in Rubber membrane cover 41 and the corresponding pvc pipe 42 of connection, suitably inflates and smearing alite paste makes Rubber membrane cover 41 be pasted onto thick spiral shell
The design position of rasp bar section 11 realizes the installation of rod piece nested arrangement 4.Finally, being successively inserted in from the end of fine thread rod segment 12
Stop grouting plug 24, anchor plate 21, high-strength elastic anchor block 22, anchor pole rod end nut 23, while it is pre- that pvc pipe 42 sequentially passed through stop grouting plug
It boxes out 241 and anchor plate preformed hole 211, realizes the initial installation of the fixed device 2 of rod end, be finally completed combined anchor device
Overall package.
3) inserted link: assembled combined anchor device is inserted into the drilling hole 6 cleared up, to rubber from pvc pipe 42
It is pressed into air in glue film sleeve 41, expands Rubber membrane cover 41, until fitting closely with the hole wall of drilling hole 6, makes anchor pole rod piece 1
It is clamped in the center of hole 6, and the slip casting region of fast anchor section 61 and reinforcement section 62 is completely isolated；Simultaneously by the fixed dress of rod end
It sets 2 promotions and is tightened in the aperture of drilling hole 6, complete inserted link process.
4) mechanical anchor: pipe end nut 33 is screwed in the pipe end of the steel pipe nose threads 311 of hollow steel tube 31, then is adopted
Manually or mechanical system, hammering protrude 3 pipe end of hollow steel tube of 1 middle through-hole 13 of anchor pole rod piece, and hammer force is through hollow steel tube
31 are transferred to extruding pushing block 32, under the support of rounded head 52, squeeze 32 side wall of pushing block and the medial slope of embedding rock anchor block 53 connects
Pressure is touched and transmits, so that embedding rock anchor block 53 is along the nested compressional movement outward of section piston hole 511.Repeatedly after hammering, so that embedding
The anchor block steel-tooth 531 of rock anchor block 53 is embedded in hole wall, maintains the forward extruding force of hammering device, and rapidly by pipe end nut 33
Screwing connect the large diameter and inner thread section on the inside of it with the fine thread rod segment 12 of anchor pole rod piece 1, small
Diameter internal screw thread is connect with the steel pipe nose threads 311 of hollow steel tube 31, and extrusion stress is locked in hollow steel tube 31 whereby
Portion, and then the mechanical presses power of embedding rock anchor block 53 is kept, make mechanical anchor head 5 tightly build-in in hole palisades.
5) initial pre- tensioning: pulling anchor pole rod piece 1, after confirming that mechanical anchor head 5 generates initial mechanical anchor force, by stop grouting plug
24 are clamped on aperture, block aperture by its elasticity, and anchor plate 21 is laid in drilling 6 aperture of hole, and further adopt
With drawing machinery to the application initial tensioning force of anchor pole rod piece 1 to design value, while successively by high-strength elastic anchor block 22 and anchor pole bar
End nut 23 is tightened in 21 rear side of anchor plate and is close to therewith, rod end stretching force is locked, so that the deformation of country rock 7 obtains just
Step control.
6) fast anchor section slip casting: using slip casting machinery inject into slip casting rod piece 3 it is fast it is solidifying anchor slurries, during slurries pass sequentially through
Empty steel pipe 31, pushing block slurry outlet 321 flow into inside mechanical anchor head 5, further flow into drilling hole by rounded head slurry outlet 521
The fast anchor section 61 in hole 6 rationally controls grouting pressure, waits fast solidifying slurries to completely fill out the crack of hole wall, until high pressure slurries
It is difficult to inject, blocks 3 tail end of slip casting rod piece at this time, wait the fast solidifying grout cures of fast anchor section 61, the carrying time of waiting is not short
In 30min.
7) two times tensioning: in fast 61 grout cures of anchor section and after generating bolting force, using drawing machinery again to anchor
Bar rod piece 1 applies two times tensioning power to design value, further increases surrouding rock deformation control ability, and by 22 He of high-strength elastic anchor block
Anchor pole rod end nut 23 successively screws the control ability that surrouding rock deformation is further increased to lock stretching force.
8) after surrouding rock deformation obtains tentatively control, pvc pipe 42 reinforcement section slip casting: is passed through to rubber membrane from extraneous supercharging equipment
It covers in 41 and is persistently pressed into air, make the constantly pressurization of closed Rubber membrane cover 41 until explosion, further passes through pvc pipe 42 to benefit again
The cement mortar of injection slow hardening microdilatancy in strong section 62, until grouting pressure increases sharply and is difficult to be pressed into or cement mortar
It overflows from anchor plate preformed hole 211, is fully filled at this time depending on reinforcement section 62, wait grout cures, form full length fastening power simultaneously
Enhance anchor pole shear resistance, is finally completed entire anchor bolt grouting process.
The not detailed place of the present invention is routine techniques known in those skilled in the art.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and structure
Think of is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (10)
1. a kind of combined anchor device that tunnel wall rock deformation quickly controls, it is characterised in that: the tunnel wall rock deformation is fast
The combined anchor device of speed control includes the anchor pole rod piece for providing the frictional resistance anchoring support of stretch-draw anchor supporting and overall length
(1), to control the convergent rod end of country rock fixed device (2), for fast anchor section slip casting and anchor is transmitted for fixing anchor bar starting point
Gu the slip casting rod piece (3) of extruding force, the rod piece nested arrangement for being used for slip casting subregion, (1) centering of anchor pole rod piece and reinforcement section slip casting
(4) and for mechanical anchor end of anchor rod to provide the mechanical anchor head (5) of initial anchor force；The anchor pole rod piece (1) and note
Slurry rod piece (3) is coaxial and is sleeved on slip casting rod piece (3) outside；The both ends of the anchor pole rod piece (1) are respectively arranged with mechanical anchor
Head (5) and rod end are fixed device (2)；One end of the slip casting rod piece (3) is stretched out from rod end fixed device (2), the other end
It is internal to be placed in mechanical anchor head (5)；The end of the slip casting rod piece (3) is provided with injected hole；It is provided on the machinery anchor head (5)
With the slurry outlet that injected hole connects on slip casting rod piece (3)；It is external that the rod piece nested arrangement (4) is sleeved on anchor pole rod piece (1).
2. the combined anchor device that tunnel wall rock deformation according to claim 1 quickly controls, it is characterised in that: described
The middle through-hole (13) being axially provided on anchor pole rod piece (1) along anchor pole rod piece (1)；It is logical that the slip casting rod piece (3) protrudes into middle part
It is in hole (13) and coaxial with middle through-hole (13)；The outer surface of the anchor pole rod piece (1) be provided with coarse-pitch thread rod segment (11) and
Fine thread rod segment (12)；The machinery anchor head (5) is screwed on coarse-pitch thread rod segment (11)；The rod end fixed device (2) screws
On fine thread rod segment (12).
3. the combined anchor device that tunnel wall rock deformation according to claim 2 quickly controls, it is characterised in that: described
Rod end fixed device (2) includes anchor plate (21), elastic anchor block (22), anchor pole rod end nut (23) and stop grouting plug (24)；Institute
It states anchor pole rod piece (1) and sequentially passes through stop grouting plug (24) and anchor plate (21)；The anchor pole rod end nut (23) is screwed in thin spiral shell
In rasp bar section (12)；Flexible anchor block (22) are set between the anchor pole rod end nut (23) and anchor plate (21).
4. the combined anchor device that tunnel wall rock deformation according to claim 3 quickly controls, it is characterised in that: described
Elastic anchor block (22) is integrally in dish；Through hole is provided on the elasticity anchor block (22)；The through hole inner wall be provided with
The internal screw thread that screw thread matches in fine thread rod segment (12)；The elasticity anchor block (22) is screwed in juxtaposition on fine thread rod segment (12)
Between anchor pole rod end nut (23) and anchor plate (21).
5. according to the combined anchor device that tunnel wall rock deformation described in Claims 2 or 3 or 4 quickly controls, feature exists
In: the slip casting rod piece (3) includes hollow steel tube (31), squeezes pushing block (32) and pipe end nut (33)；The anchor pole
Rod piece (1) is coaxial with hollow steel tube (31) and is sleeved on hollow steel tube (31) outside；The hollow steel tube (31) can be along anchor pole bar
The axial movement of part (1)；One end of the hollow steel tube (31) stretched out from rod end fixed device (2) after with pipe end nut
(33) it is connected, the other end is connected after stretching out from anchor pole rod piece (1) with extruding pushing block (32)；The extruding pushing block (32) is placed in machinery
Anchor head (5) is internal；The outer diameter for squeezing pushing block (32) is not more than the outer diameter of anchor pole rod piece (1) and is greater than middle through-hole (13)
Outer diameter；It is described to squeeze the pushing block slurry outlet (321) being provided on pushing block (32) with slurry outlet connects on mechanical anchor head (5)；Institute
The outer surface for stating extruding pushing block (32) is in contact with mechanical anchor head (5) inner surface is pushed；The extruding pushing block (32) is in outer masterpiece
It is held in drilling hole to be anchored with the mechanical anchor head (5) of lower promotion.
6. the combined anchor device that tunnel wall rock deformation according to claim 5 quickly controls, it is characterised in that: described
It is whole round table-like to squeeze pushing block (32)；The frustum cone side for squeezing pushing block (32) connects with mechanical anchor head (5) inner surface is pushed
Touching；The axially inner face of the pipe end nut (33) is variable diameter；The pipe end nut (33) is from hollow steel tube
(31) end is finally threadedly coupled with the fine thread rod segment (12) on anchor pole rod piece (1) after screwing in.
7. the combined anchor device that tunnel wall rock deformation according to claim 6 quickly controls, it is characterised in that: described
Mechanical anchor head (5) includes anchor head nesting section (51), rounded head (52) and embedding rock anchor block (53)；Anchor head nesting section (51) rotation
It is screwed on coarse-pitch thread rod segment (11)；The rounded head (52) is arranged in anchor head nesting section (51) end；On the rounded head (52)
It is provided with rounded head slurry outlet (521)；The rounded head slurry outlet (521) connects with pushing block slurry outlet (321)；The anchor head
Nested section piston hole (511) has been arranged radially along anchor head nesting section (51) on nested section (51)；The embedding rock anchor block (53) is set
In nested section piston hole (511)；It is described nesting section piston hole (511) be it is multiple, it is multiple nesting section piston holes (511) be evenly arranged on
Anchor head nesting section (51) is radially；The frustum cone side for squeezing pushing block (32) connects with the inner surface of embedding rock anchor block (53)
Touching；The extruding pushing block (32) pushes embedding rock anchor block (53) to stretch out from the nested section piston hole (511) and most under external force
It is held in drilling hole to be anchored eventually.
8. the combined anchor device that tunnel wall rock deformation according to claim 7 quickly controls, it is characterised in that: described
It is trapezoidal bloom that embedding rock anchor block (53) is whole, and the outer most edge of the embedding rock anchor block (53) is provided with anchor block steel-tooth (531), described embedding
The medial surface of rock anchor block (53) is prismatoid inclined-plane, the shape of the frustum cone side for squeezing pushing block (32) and embedding rock anchor block (53)
The shape of medial surface match.
9. the combined anchor device that tunnel wall rock deformation according to claim 8 quickly controls, it is characterised in that: described
Rod piece nested arrangement (4) includes Rubber membrane cover (41) and pvc pipe (42)；The Rubber membrane cover (41) is to surround anchor pole rod piece
(1) external closing abrasive rubber annulus；The pvc pipe (42) is placed in outside anchor pole rod piece (1) and with anchor pole rod piece (1) simultaneously
Row；One end of the pvc pipe (42) connects with Rubber membrane cover (41), and the other end is pierced by from rod end fixed device (2).
10. a kind of combined anchor device quickly controlled based on tunnel wall rock deformation as claimed in claim 9 is quickly applied
Work method, it is characterised in that: the described method comprises the following steps:
1) drilling, borehole cleaning: the drilling hole (6) of appropriate length is cut using drilling machine, and uses the cleaning of high pressure water flow
Remaining clast in hole；
2) anchor pole assembles: by slip casting rod piece (3) from the middle through-hole (13) of tail end insertion anchor pole rod piece (1), by embedding rock anchor block
(53) after being embedded in the nested section piston hole (511) of anchor head nesting section (51), anchor head nesting section (51) is rotated integrally by screw thread
It is anchored on coarse-pitch thread rod segment (11)；Rubber membrane cover (41) and the corresponding pvc pipe of connection are inserted in from anchor pole rod piece (1) front end
(42), suitably inflate and smear the design position that alite paste makes Rubber membrane cover (41) be pasted onto coarse-pitch thread rod segment (11)；From thin spiral shell
Successively it is inserted in stop grouting plug (24), anchor plate (21), high-strength elastic anchor block (22), anchor pole rod end nut in the end of rasp bar section (12)
(23), stop grouting plug preformed hole (241) and anchor plate preformed hole (211) while by pvc pipe (42) are sequentially passed through, is finally completed combination
The overall package of formula anchor rod device；
3) inserted link: assembled combined anchor device is inserted into the drilling hole (6) cleared up, to rubber from pvc pipe (42)
It is pressed into air in glue film sleeve (41), expands Rubber membrane cover (41), until fitting closely with the hole wall of drilling hole (6), makes anchor
Bar rod piece (1) is clamped in the center of hole (6), and the slip casting region of fast anchor section (61) and reinforcement section (62) is completely isolated；
Rod end fixed device (2) is pushed and be tightened in the aperture of drilling hole (6) simultaneously, completes inserted link process；
4) pipe end nut (33): being screwed in the pipe end of the steel pipe nose threads (311) of hollow steel tube (31) by mechanical anchor, then
Using manually or mechanically mode, hollow steel tube (3) pipe end of prominent anchor pole rod piece (1) middle through-hole (13), hammer force warp are hammered
Hollow steel tube (31), which is transferred to, squeezes pushing block (32), under the support of rounded head (52), squeezes pushing block (32) side wall and embedding rock anchor
The medial slope of block (53) contacts and transmits pressure, so that embedding rock anchor block (53) squeezes outward along nested section piston hole (511)
Movement；Repeatedly after hammering, so that the anchor block steel-tooth (531) of embedding rock anchor block (53) is embedded in hole wall, maintain hammering device is forward to squeeze
Pressure, and pipe end nut (33) screwed rapidly make to anchor pole rod piece (1) end large diameter and inner thread section on the inside of it with
The fine thread rod segment (12) of anchor pole rod piece (1) connects, the steel pipe nose threads (311) of minor diameter internal screw thread and hollow steel tube (31)
Extrusion stress is locked in hollow steel tube (31) inside whereby, and then keeps the mechanical presses power of embedding rock anchor block (53) by connection, is made
Mechanical anchor head (5) tightly build-in is in hole palisades；
5) initial pre- tensioning: pulling anchor pole rod piece (1), after confirming that mechanical anchor head (5) generates initial mechanical anchor force, by stop grouting plug
(24) it is clamped on aperture, aperture is blocked by its elasticity, and anchor plate (21) is laid in drilling hole (6) aperture, is gone forward side by side
One step uses drawing machinery to anchor pole rod piece (1) application initial tensioning force to design value, while successively by high-strength elastic anchor block
(22) it is tightened on rear side of anchor plate (21) and is close to therewith with anchor pole rod end nut (23), lock rod end stretching force, so that
The deformation of country rock (7) is tentatively controlled；
6) fast anchor section slip casting: fast solidifying anchoring slurries are injected into slip casting rod piece (3) using slip casting machinery, slurries pass sequentially through hollow
Steel pipe (31), pushing block slurry outlet (321) flow into mechanical anchor head (5) inside, are further flowed by rounded head slurry outlet (521)
The fast anchor section (61) of drilling hole (6) completely fills out in the crack of hole wall when high pressure slurries are difficult to inject when coagulate slurries fastly,
Block slip casting rod piece (3) tail end；
7) two times tensioning: in fast anchor section (61) grout cures and after generating bolting force, using drawing machinery again to anchor pole
Rod piece (1) applies two times tensioning power to design value, by high-strength elastic anchor block (22) and anchor pole rod end nut (23) successively screw with
Lock stretching force；
8) after surrouding rock deformation obtains tentatively control, pvc pipe (42) reinforcement section slip casting: are passed through to rubber membrane from extraneous supercharging equipment
It covers in (41) and is persistently pressed into air, make closed Rubber membrane cover (41) constantly pressurization until bursting, then pass through pvc pipe (42) to benefit
The cement mortar of injection slow hardening microdilatancy in strong section (62), until grouting pressure increases sharply and is difficult to be pressed into or cement mortar
It is overflowed from anchor plate preformed hole (211), waits grout cures, be finally completed entire anchor bolt grouting process.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910380003.5A CN110185484A (en) | 2019-05-08 | 2019-05-08 | The combined anchor device and construction method that tunnel wall rock deformation quickly controls |
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|---|---|---|---|
| CN201910380003.5A CN110185484A (en) | 2019-05-08 | 2019-05-08 | The combined anchor device and construction method that tunnel wall rock deformation quickly controls |
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|---|---|---|---|
| CN201910380003.5A Pending CN110185484A (en) | 2019-05-08 | 2019-05-08 | The combined anchor device and construction method that tunnel wall rock deformation quickly controls |
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| CN111412004A (en) * | 2020-03-18 | 2020-07-14 | 国网浙江省电力有限公司温州供电公司 | Expansion shell type grouting anchor rod device |
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| CN113294187B (en) * | 2021-05-24 | 2023-08-04 | 上海应用技术大学 | Telescopic anchor rod and construction method thereof |
| CN113958352A (en) * | 2021-10-21 | 2022-01-21 | 西南交通大学 | Anchor rod suitable for soft broken rock-soil body and construction method |
| CN113958352B (en) * | 2021-10-21 | 2024-01-30 | 西南交通大学 | Anchor rod suitable for weak broken rock-soil body and construction method |
| CN114607428A (en) * | 2022-03-08 | 2022-06-10 | 长江水利委员会长江科学院 | Inner anchor type telescopic anchor rod for soft rock reinforcement and application method |
| CN114607428B (en) * | 2022-03-08 | 2024-06-11 | 长江水利委员会长江科学院 | Internal anchor type telescopic anchor rod for soft rock reinforcement and application method |
| CN115788539A (en) * | 2023-02-08 | 2023-03-14 | 中铁二十五局集团有限公司 | Advanced anchor rod capable of enlarging end grouting range |
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