CN109578034A - A kind of high strength grouting anchor cable with from degassing function - Google Patents
A kind of high strength grouting anchor cable with from degassing function Download PDFInfo
- Publication number
- CN109578034A CN109578034A CN201910073093.3A CN201910073093A CN109578034A CN 109578034 A CN109578034 A CN 109578034A CN 201910073093 A CN201910073093 A CN 201910073093A CN 109578034 A CN109578034 A CN 109578034A
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- China
- Prior art keywords
- anchor cable
- steel wire
- grouting
- wire
- high strength
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0093—Accessories
Abstract
A kind of high strength grouting anchor cable with from degassing function, including anchor cable pallet, Anchor Cable Anchorage and prestress wire, the prestress wire passes through anchor cable pallet and Anchor Cable Anchorage is arranged, Grouting Pipe is additionally provided on the anchor cable pallet, the prestress wire is divided into three layers, core steel wire including internal layer, the plain steel wire of middle layer and the cover wire of outer layer, the periphery of the core steel wire is with reeded steel wire, the plain steel wire twisting direction of the middle layer be it is left-handed to, the plain steel wire of the middle layer is fitted closely with core steel wire, groove diameter on the core steel wire periphery is less than the diameter of middle layer plain steel wire, the stop grouting plug of control Grouting Pipe is provided between the Grouting Pipe and roadway surrounding rock, the grouting cable anchor realizes automatic exhaust in slip casting, no setting is required arranges Tracheae, and grouting quality is high, lowers construction cost.
Description
Technical field
It is specifically exactly a kind of with from degassing function the present invention relates to colliery tunnel support Anchor Cable Technique field
High strength grouting anchor cable.
Background technique
With being continuously increased for coal mining depth, or else tunnel Topographic Complex Degree also breaks and changes, is mainly reflected in enclose
Situations such as rock is broken serious, and stress is concentrated, near the poor tunnel of country rock, large-section underground, crossover point, shear-zone and by
The tunnel that dynamic pressure influences.Supporting requirement has been unable to reach using common suspension roof support, supporting length need to be increased, has improved anchoring effect
Fruit.It was verified that the stress concentration region roadway surrounding rock all bigger to loose range and aeration level, which carries out anchor pouring reinforcement, to be had
Good effect, the principle of anchor pouring reinforcement are that the effect of the support action of anchor cable and grouting and reinforcing combines, collective effect
It can not only fundamentally guarantee that anchorage cable anchoring is reliable by grouting cable anchor pressure injection organic or inorganic slurries in roadway surrounding rock, and
Slurries can penetrate into around drilling in large range of coal and rock, generate adhesive solidification effect to the coal and rock for occurring loosening,
Its globality is significantly improved, the self-supporting tendency of coal and rock is improved, to substantially improve supporting effect of roadway.
Currently, mainly having hollow grouting cable anchor and common grouting cable anchor using more universal grouting cable anchor form, wherein
Hollow grouting cable anchor uses reversed grouting mode, mainly there is SKZ22-1/1860 and two kinds of SKZ22-1/1770, rope on the market
1 × 7 steel strand wires are transformed by body structure type nothing more than, and process wire is changed to seamless steel pipe, are used for slip casting, outer layer
It is formed using 8 compressor wire twistings, since seamless steel pipe can not be bent, it is nonmetallic soft that intermediate longer portion, which needs to change,
Pipe, in order to installation, therefore, intensity is substantially reduced, and by taking SKZ22-1/1860 anchor cable as an example, steel strand wires maximum, force is only
For 400kN, it is far below 1*19-21.8-1860-GB/T5224-2014 steel strand wires maximum, force characteristic value 554kN, and hollow note
Anchor cable is starched without exhaust apparatus, when carrying out slip casting operation, bubble and cavity is will form in drilling, reduces anchoring effect.And it is common
Grouting cable anchor be provided with exhaust apparatus, common practices be add exhaust pipe, cause to construct cumbersome, increased costs.
Summary of the invention
The purpose of the present invention is to provide a kind of high strength grouting anchor cable with from degassing function, which is being infused
Automatic exhaust is realized when slurry, no setting is required exhaust pipe, and also grouting quality is high, lowers construction cost.
The technical scheme adopted by the invention to solve the technical problem is that: a kind of high strength grouting with from degassing function
Anchor cable, including anchor cable pallet, Anchor Cable Anchorage and prestress wire, the prestress wire pass through anchor cable pallet and anchor cable
Anchorage setting, is additionally provided with Grouting Pipe on the anchor cable pallet, and the prestress wire is divided into two layers or three layers,
Three layers of prestress wire includes the core steel wire, the plain steel wire of middle layer and the cover wire of outer layer of internal layer, described
The periphery of core steel wire is with reeded steel wire, and the plain steel wire twisting direction of the middle layer is left-handed to described
The plain steel wire of middle layer fitted closely with core steel wire, the groove diameter on the core steel wire periphery is less than centre
The diameter of layer plain steel wire, is provided with the stop grouting plug of control Grouting Pipe between the Grouting Pipe and roadway surrounding rock.
As optimization, be provided with groove disposed in parallel on the periphery of the core steel wire, the groove along
The axial setting of core steel wire, and number of recesses is chosen as 2,3 or 4.
As optimization, the cover wire is chosen as indentation class steel wire, helix rib steel wire or plain steel wire.
As optimization, the stop grouting plug uses non-metallic material, is provided on stop grouting plug for passing through Grouting Pipe
Through-hole.
As optimization, the anchor cable pallet is domes, is provided in the centre of the anchor cable pallet for wearing
The circular hole for crossing prestress wire is provided with the through-hole for passing through Grouting Pipe in the side of anchor cable pallet.
As optimization, the Grouting Pipe uses PVC material, one end of Grouting Pipe is provided with fast joint, by connecing fastly
Head is quickly connect with grouting equipment.
As optimization, Anchor Cable Anchorage is provided on the outside of the anchor cable pallet, the Anchor Cable Anchorage passes through prestressing force
Steel strand wires installation, the Anchor Cable Anchorage includes anchor ring, intermediate plate and O-ring.
The beneficial effects of the present invention are: compared with prior art, a kind of high intensity with from degassing function of the invention
Grouting cable anchor, anchor cable body are based on 1 × 19 Shandong western construction and optimize, and core is changed to reeded prestress steel
Silk, increasing can will drill with outer layer steel strand wires twisting gap, raising grouting cable anchor intensity when carrying out high-pressure slip-casting operation
And the air in wall-rock crack, it is outer by the groove discharge drilling on core steel wire periphery, it solves and generates bubble or cavity
The problem of, anchoring effect is greatly improved, and without adding other exhaust apparatus, simplify flow chart, reduce supporting
Cost improves work efficiency.
Detailed description of the invention
Fig. 1 is overall construction drawing of the present invention；
Fig. 2 is prestress wire profile of the present invention；
Fig. 3 is Grouting Pipe schematic enlarged-scale view of the present invention；
Venting principleand figure when Fig. 4 is slip casting operation of the present invention；
Wherein, pipe, 3 anchor cable pallets, 4 Grouting Pipes, 5 Anchor Cable Anchorages, 6 core steel wires, 7 smooth round steel are only starched in 1 prestress wire, 2
Silk, 8 cover wires, 9 roadway surrounding rocks, 10 anchoring sections, 11 slip casting sections, 12 grooves.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be arranged and be designed with a variety of different configurations.Therefore, below to the reality of the invention provided in the accompanying drawings
The detailed description for applying example is not intended to limit the range of claimed invention, but is merely representative of selected implementation of the invention
Example.Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts
Every other embodiment, shall fall within the protection scope of the present invention.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
In the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, or be somebody's turn to do
Invention product using when the orientation or positional relationship usually put, be merely for convenience of description of the present invention and simplification of the description, without
It is that the device of indication or suggestion meaning or element must have a particular orientation, be constructed and operated in a specific orientation, therefore not
It can be interpreted as limitation of the present invention.In addition, term " first ", " second ", " third " etc. are only used for distinguishing description, and cannot manage
Solution is indication or suggestion relative importance.
As shown in Fig. 2, a kind of high strength grouting anchor cable with from degassing function, including anchor cable pallet 3, Anchor Cable Anchorage 5
With prestress wire 1, the prestress wire 1 passes through anchor cable pallet 3 and Anchor Cable Anchorage 5 is arranged, in the anchor cable
Grouting Pipe 4 is additionally provided on pallet 3, it is three layers that the prestress wire 1, which divides, the core steel wire 6 including internal layer, middle layer
Plain steel wire 7 and outer layer cover wire 8, the periphery of the core steel wire 6 is the steel wire with fluted 12, described
The 7 twisting direction of plain steel wire of middle layer be it is left-handed to, plain steel wire 7 and the core steel wire 6 of the middle layer fit closely,
12 diameter of groove on 6 periphery of core steel wire is less than the diameter of middle layer plain steel wire 7, in the Grouting Pipe 4
The stop grouting plug 2 of control Grouting Pipe 4 is provided between roadway surrounding rock 1.
One sets gradually Grouting Pipe, grouting plug, anchor cable pallet and Anchor Cable Anchorage, prestress steel twist on prestress wire
The most inner side of line is core steel wire, and core steel wire is round compressor wire, the edge being arranged on the periphery of compressor wire
The groove being axially distributed, groove are uniformly distributed along core steel wire periphery, the quantity of groove can choose as 2,3 or
4, optimal selection is 3 grooves, ensure that the stress of core steel wire and can guarantee enough degassing functions, in core
The outer layer of steel wire be provided with it is left-handed to plain steel wire, pass through plain steel wire and reduce gap after twisting between steel wire, guarantee
Leakproofness in slip casting, so that the air in drilling can only discharge drilling by the groove of core steel wire, outermost layer is
The higher steel wire of the intensity of setting guarantees the rigidity of integrated prestress steel strand wires, may be selected to be indentation class steel wire, helix rib steel wire
Or plain steel wire, optimal selection are helix rib steel wires, improve the preceding degree of prestress wire entirety, guarantee protruding into drilling
When hardness, prevent insertion drilling be that roadway surrounding rock damages, grouting cable anchor is to pass through prestress steel twist from degassing function
Axial notch on the core steel wire of line realizes, on the top for protruding into bore inner, by after bore inner slip casting, in drilling
And the air of roadway surrounding rock wall enters prestressing force by the gap between the groove and twisting steel wire among prestress wire
Steel strand wires are finally discharged to outside hole, and the slurries of injection are due to can not be by the gap between groove and twisting steel wire, thus real
Show after gas completes discharge, liquid is taken into entire drilling, realizes the filling of slurries, reduces setting for exhaust pipe
It sets, and is not necessarily to occupied space, reduce anchor cable cost, improve slip casting efficiency, and slip casting effect also improves.
Groove 12 disposed in parallel is provided on the periphery of the core steel wire 6, the groove 12 is along core
The axial setting of steel wire 6, and 12 quantity of groove is chosen as 2,3 or 4.
The cover wire 8 is chosen as indentation class steel wire, helix rib steel wire or plain steel wire.
The stop grouting plug 2 uses non-metallic material, and the through-hole for passing through Grouting Pipe 4 is provided on stop grouting plug 2.
The anchor cable pallet 3 is domes, is provided in the centre of the anchor cable pallet 3 for across prestressing force
The circular hole of steel strand wires 1 is provided with the through-hole for passing through Grouting Pipe 4 in the side of anchor cable pallet 3.
The Grouting Pipe 4 use PVC material, one end of Grouting Pipe 4 is provided with fast joint, by fast joint quickly with
Grouting equipment connection.
The outside of the anchor cable pallet 3 is provided with Anchor Cable Anchorage 5, and the Anchor Cable Anchorage 5 passes through prestress wire 1
Installation, the Anchor Cable Anchorage 5 include anchor ring, intermediate plate and O-ring.
1 is prestress wire in Fig. 1, and structure is 1 × 19 western Shandong formula, and section sectional view is as shown in Figure 2.Core steel
Silk is changed to reeded steel wire, groove number optional 2,3,4, preferentially chooses 3 grooves.It is light by the outside first layer of core
Round steel wire, twisting direction be it is left-handed to.Plain steel wire is used to reduce the gap after twisting between each steel wire.Outermost layer uses indentation
Class, spiral ribs or plain steel wire, preferred helix rib steel wire.
The plain steel wire of the middle layer of prestress wire uses left-hand rotation direction, while the steel wire of outer layer is also using left-hand
Rotation direction can reduce the gap between steel wire and steel wire, between steel wire floor and steel wire floor in this way, while guarantee that gap can only be realized
Air passes through, and grouting serous fluid can not be by the gap between steel wire floor due to belonging to a kind of non-newtonian fluid, slurries, this
Sample is just able to satisfy in bored grouting, the air discharge in hole, and slurries can not be discharged, and change air the space occupied into slurry
Liquid realizes slip casting operation.
2 be stop grouting plug in Fig. 1, and material is rubber or other non-metallic materials, for blocking drilling.Stop grouting plug end face is equipped with
Through-hole, for across Grouting Pipe.
Stop grouting plug is arranged across prestress wire, and is inserted into bore inner, by the plasticity of stop grouting plug, realizes drilling
Sealing, while carrying out slip casting operation by Grouting Pipe, after slip casting is fully completed, pressure in drilling rises, with pressure
The rising of power, slurries form certain pressure to stop grouting plug, and stop grouting plug oppresses internal Grouting Pipe after being pressurized, and realize slip casting
Stop.
3 be anchor cable pallet in Fig. 1, and structure is arch, is made of steel plate.Through-hole is drilled in arch position.
4 be Grouting Pipe in Fig. 1, and Grouting Pipe uses PVC or other non-metallic materials with certain plasticity, Grouting Pipe one end
Equipped with fast connector, convenient for being connect with grouting equipment.The other end passes through anchor cable pallet and stop grouting plug insertion drilling.Fig. 3 is knot
Structure schematic diagram.
5 be Anchor Cable Anchorage in Fig. 1, is made of anchor ring, intermediate plate and O-ring.
Specific work steps and principle: as shown in figure 4, being punched first in the roadway surrounding rock 9 for needing supporting, by certain length
Resin anchoring agent headed into bottom hole with prestress wire, then carry out the processes such as Anchor Agent stirring.(anchoring section is formed:
Anchor Agent is made of curing agent and resin-bonded mastic, and the two is separated by film.When steel strand wires stir Anchor Agent, film is broken
Bad, curing agent and resin-bonded mastic are sufficiently mixed and react.Wherein there is a gel time, can be divided into according to length of time super
Fastly, quickly, middling speed and at a slow speed.MT146.2-2011 can specifically be had a look.It reacts and solidifies, steel strand wires and country rock are consolidated
It is scheduled on together) then anchoring section 2 is formed after Anchor Agent solidification according to mounting process.Grouting Pipe is penetrated into stop grouting plug through-hole
It is interior, it is then fitted on steel strand wires, carries out tensioning after being sequentially placed into anchor cable pallet and Anchor Cable Anchorage.After tensioning, by Grouting Pipe one
End is connect with grouting pump starts slip casting operation, grouting pressure 0.4-0.5MPa.Grouting pressure shows by pressure gauge, grouting pressure
For steady state value.Slip casting process is actually the process that slurries empty air in drilling and wall-rock crack.Slurries are by 425# silicic acid
A kind of non-newtonian fluid made of salt cement and additive configuration.(this can have a look Baidu's explanation, think the meaning of expression
It is exactly a kind of sticky liquid, is exactly that liquid can not be by steel strand wires gap, and air can be discharged by gap) slurries can not
Enter exhaust passage 4 by steel wire twisting gap.When air is drained in drilling and wall-rock crack, at this time because no gas is discharged,
Grouting pressure will occur more than the peak value of normal grouting pressure.It can then represent in drilling and wall-rock crack at this time and fill slurries,
Form slip casting section 3.
In the embodiment shown in Figure 2, there are three groove, the diameters of groove for setting on the core steel wire of prestress wire
Size is less than the diameter of process wire, and process wire layer is on the left-handed outer surface for being wound on core steel wire, in core steel
The flowing that can realize gas between silk and process wire by groove, as shown in figure 3, in the cross section of prestress wire
On, groove is that even circumferential is distributed on core steel wire, ensure that the air around prestress wire can enter groove
Inside is easily discharged out of the hole by prestress wire, while optimal number of recesses is selected as 3, can guarantee the gas that drilled
Under the premise of body is discharged, additionally it is possible to guarantee the intensity of core steel wire, and groove is circular groove, during the diameter of groove is less than
Between gauge of wire, process wire winding when ensure that groove is not blocked by process wire.
As another embodiment, the prestress wire is divided into two layers, core steel wire and outer layer including internal layer
Cover wire, the periphery of the core steel wire are with reeded steel wire.
Above-mentioned specific embodiment is only specific case of the invention, and scope of patent protection of the invention includes but is not limited to
The product form and style of above-mentioned specific embodiment, any ordinary skill people for meeting the present invention and any technical field
The appropriate changes or modifications that member does it, all shall fall within the protection scope of the present invention.
Claims (7)
1. a kind of high strength grouting anchor cable with from degassing function, it is characterised in that: including anchor cable pallet (3), Anchor Cable Anchorage
(5) and prestress wire (1), the prestress wire (1) pass through anchor cable pallet (3) and Anchor Cable Anchorage (5) setting,
It being additionally provided with Grouting Pipe (4) on the anchor cable pallet (3), the prestress wire (1) is divided into two layers or three layers, and three
Layer prestress wire (1) include the core steel wire (6) of internal layer, middle layer plain steel wire (7) and outer layer cover wire
(8), the periphery of the core steel wire (6) is the steel wire with fluted (12), and the plain steel wire (7) of the middle layer is twisted
Direction processed is left-handed to plain steel wire (7) and the core steel wire (6) of the middle layer fit closely, the core steel wire
(6) (12) diameter of the groove on periphery is less than the diameter of middle layer plain steel wire (7), in the Grouting Pipe (4) and tunnel
The stop grouting plug (2) of control Grouting Pipe (4) is provided between country rock (1).
2. a kind of high strength grouting anchor cable with from degassing function according to claim 1, it is characterised in that: described
It is provided on the periphery of core steel wire (6) groove disposed in parallel (12), the groove (12) is along core steel wire (6)
Axial setting, and groove (12) quantity is chosen as 2,3 or 4.
3. a kind of high strength grouting anchor cable with from degassing function according to claim 1, it is characterised in that: described
Cover wire (8) is chosen as indentation class steel wire, helix rib steel wire or plain steel wire.
4. a kind of high strength grouting anchor cable with from degassing function according to claim 1, it is characterised in that: described
Stop grouting plug (2) uses non-metallic material, is provided on stop grouting plug (2) for the through-hole across Grouting Pipe (4).
5. a kind of high strength grouting anchor cable with from degassing function according to claim 1, it is characterised in that: described
Anchor cable pallet (3) is domes, is provided in the centre of the anchor cable pallet (3) for across prestress wire (1)
Circular hole, be provided in the side of anchor cable pallet (3) for the through-hole across Grouting Pipe (4).
6. a kind of high strength grouting anchor cable with from degassing function according to claim 1, it is characterised in that: described
Grouting Pipe (4) uses PVC material, and one end of Grouting Pipe (4) is provided with fast joint, is quickly connected with grouting equipment by fast joint
It connects.
7. a kind of high strength grouting anchor cable with from degassing function according to claim 1, it is characterised in that: described
It being provided on the outside of anchor cable pallet (3) Anchor Cable Anchorage (5), the Anchor Cable Anchorage (5) is installed across prestress wire (1),
The Anchor Cable Anchorage (5) includes anchor ring, intermediate plate and O-ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910073093.3A CN109578034B (en) | 2019-01-25 | 2019-01-25 | High-strength grouting anchor cable with self-exhausting function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910073093.3A CN109578034B (en) | 2019-01-25 | 2019-01-25 | High-strength grouting anchor cable with self-exhausting function |
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| Publication Number | Publication Date |
|---|---|
| CN109578034A true CN109578034A (en) | 2019-04-05 |
| CN109578034B CN109578034B (en) | 2023-09-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910073093.3A Active CN109578034B (en) | 2019-01-25 | 2019-01-25 | High-strength grouting anchor cable with self-exhausting function |
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