CN108386217B - A kind of the automatic classification expansion head Pulling-Resistant Anchor Rod and its application method of reinforcing soft rock mass - Google Patents
A kind of the automatic classification expansion head Pulling-Resistant Anchor Rod and its application method of reinforcing soft rock mass Download PDFInfo
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- CN108386217B CN108386217B CN201810113828.6A CN201810113828A CN108386217B CN 108386217 B CN108386217 B CN 108386217B CN 201810113828 A CN201810113828 A CN 201810113828A CN 108386217 B CN108386217 B CN 108386217B
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- 239000011435 rock Substances 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 10
- 238000004873 anchoring Methods 0.000 claims abstract description 43
- 239000004568 cement Substances 0.000 claims abstract description 42
- 239000002002 slurry Substances 0.000 claims abstract description 37
- 239000000463 material Substances 0.000 claims abstract description 28
- 238000005553 drilling Methods 0.000 claims abstract description 17
- 239000002689 soil Substances 0.000 claims abstract description 11
- 238000012545 processing Methods 0.000 claims abstract description 6
- 239000004698 Polyethylene Substances 0.000 claims description 18
- -1 polyethylene Polymers 0.000 claims description 18
- 229920000573 polyethylene Polymers 0.000 claims description 18
- 239000007787 solid Substances 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 238000013461 design Methods 0.000 claims description 6
- 238000007569 slipcasting Methods 0.000 claims description 6
- 239000011083 cement mortar Substances 0.000 claims description 4
- 230000010410 reperfusion Effects 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 230000008961 swelling Effects 0.000 claims description 3
- 238000004880 explosion Methods 0.000 claims description 2
- 239000003365 glass fiber Substances 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 16
- 238000002347 injection Methods 0.000 abstract 1
- 239000007924 injection Substances 0.000 abstract 1
- 230000011218 segmentation Effects 0.000 abstract 1
- 230000006641 stabilisation Effects 0.000 abstract 1
- 238000011105 stabilization Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 10
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000003673 groundwater Substances 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 239000004067 bulking agent Substances 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 208000010392 Bone Fractures Diseases 0.000 description 2
- 206010017076 Fracture Diseases 0.000 description 2
- 206010058109 Hangnail Diseases 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000010412 perfusion Effects 0.000 description 2
- 208000002565 Open Fractures Diseases 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
- E21D20/021—Grouting with inorganic components, e.g. cement
Abstract
The automatic classification that the present invention discloses a kind of reinforcing soft rock mass expands head Pulling-Resistant Anchor Rod and its application method, and anchor pole is made of big projecting thread anchor pole and the box being bonded on anchor pole, and box is provided with expansion cement slurry.Method includes the following steps: step 1: drilling postfixed point microexplosion；Step 2: by the box of waterproof material with different arrangement modes with cementitious on big projecting thread anchor pole；Step 3: expansion cement slurry is infused in box；Step 4: anchor pole being protruded into hole, the segmentation injection normal concrete in anchor pole and palisades gap；Step 5: exposed anchor pole protection processing.The invention proposes it is a kind of can underwater construction reinforce the simple construction method of off-load soft rock mass, expansion cement slurry box automatically forms multistage expansion head after microexplosion, it is remarkably improved the withdrawal resistance of anchor pole, effectively solves the problems, such as that anchoring section anchoring is hypodynamic in weak rocks soil stabilization.
Description
Technical field
It is especially a kind of to reinforce off-load soft rock mass, fragmented rock body the present invention relates to rock-reinforcing field of engineering technology
Method.
Background technique
With the development of China underground deep-foundation pit engineering, the difficulty of roadway support is increasing, especially in soft rock-soil
At body and fragmented rock body concentration, the convergent deformation speed in tunnel is fast, so that supporting is relatively difficult.Using single common bolt,
The reinforcement measures such as prestressed anchor or enlarged footing anchor pole are difficult to reach the requirement of engineering design.Engineering practice shows existing anchor
The main fracture form of bar is to pull open fracture caused by tensile load is insufficient, and fracture has apparent constriction.
Swelling agent is widely used in current construction, his major function is in compensating concrete hardening process
Drying shrinkage and shrinkage.Expansion cement slurry gradually started in side slope and anchoring in rock and soil supporting using using, by expanding cement in recent years
Slurry greatly improves the withdrawal resistance of anchor pole using the lateral expansion of expansion cement slurry, and reduce material cost in conjunction with anchor pole,
Maximized economic benefit is striven for.
(patent publication No.: CN101538856A) discloses a kind of construction method of enlarged footing anchor pole, drill hole of drilling machine to
If behind enlarged footing position, being that off-balance bit carries out percussive drilling by bit change-over, being acted on using the side knock of off-balance bit real
Existing reaming creeps into form enlarged footing.When this method carries out enlarged footing anchor bolt construction, construction technology is more complex, and the diameter of reaming
And number is limited, the anchor force and withdrawal resistance of anchor pole can not greatly improve.This anchor pole can not be used for underwater construction situation.
(patent publication No.: CN1811131A) disclose it is a kind of drill out bolthole with drilling machine, using extrusion head by bolthole
It is squeezed into enlarged footing, then places reinforcing bar, the construction method for the expansion head anchor pole that last slip casting is formed.The enlarged footing bolthole of the method
The complex process in engineering construction, and anchor pole expands head and can not automatically form, and can not be used for underwater construction situation.
(patent publication No.: CN206289631U) discloses a kind of novel anchor rod.The anchor pole include anchor head, movable hangnail,
Anchor bar body, arc-shaped protrusions, spring and anchored end.Anchor head heats upsetting pressure into cylinder, and when movable hangnail use is opened by fitting,
The arc-shaped protrusions that anchor bar body two sides have spring to connect.Though above-mentioned anchor pole expands head multiplicity, there is preferable tensile capacity, anchor pole system
Make complicated, it may be necessary to customizing, and this anchor pole material is indefinite, when to full of being lauched situation greatly, can not use.
(patent publication No.: CN104278674A) discloses a kind of construction method of recyclable expansion head anchor pole, by turning
Lever body, make the nut of screw rod and herringbone enlarged footing generate towards or away from move horizontally so that herringbone enlarged footing supports
Open form is at enlarged footing.When this method is constructed, though not needing slip casting, enlarged footing is anchoring pipe and steel strand wires, has fatigue damage special
Property, and can not be corrosion-resistant under groundwater condition.
Summary of the invention
It is an object of the invention to deficiency, providing a kind of structure simply can underwater construction in view of the drawbacks of the prior art
Automatic classification expand head Pulling-Resistant Anchor Rod and application method.
In order to solve the above-mentioned technical problem, the present invention proposes following technical scheme: a kind of reinforcing soft rock mass automatic point
Grade expands head Pulling-Resistant Anchor Rod, it includes carrying out the loosening hole rubble circle that fixed point microexplosion is formed to cylinder bore using microexplosion mold,
The cylinder bore is drilled through on rock mass by drilling machine, is equipped with anchor pole inside the cylinder bore, on the outer wall of the anchor pole
Multiple box bodys are fixed with, the box body is matched with the loosening hole rubble circle in cylinder bore, poured in tray interior swollen
Swollen cement slurry, the anchor pole are divided into non-anchored section and anchoring section, have poured common coagulation inside described non-anchored section and anchoring section
Soil, the anchoring section are one section where box body.
The microexplosion mold matches with the electric cap of installation inside it and carries out explosion to the cylinder bore on rock mass.
The anchor pole uses the solid anchor pole of shape of threads, glass fibre anchor pole, reinforced anchor bolt or Anchor cable-rod.
The box body is made of waterproof material, and feed opening and venthole are provided on box body, and the feed opening is greater than
Venthole；The diameter of feed opening is 2-5cm, and the diameter of venthole is 1-3cm.
The box body use polyethylene material box, the box body it is symmetrical or it is asymmetrical be arranged on anchor pole, and
Multistage expansion head anchor cable is formed in loosening hole rubble circle position under the action of expansion cement slurry.
The box body is bonded on anchor pole using spiral, or is surround using circular box with holes and be connected to anchor
On bar, and circular box is reusable, to expansion cement slurry initial set, i.e., detachable to reuse.
It is described reinforce soft rock mass automatic classification expand head Pulling-Resistant Anchor Rod application method, it the following steps are included:
Step 1: drilling through the cylinder bore of certain diameter on Rock And Soil with drilling machine, cylinder bore is carried out with microexplosion mold
Microexplosion is pinpointed, palisades is made to form the loosening hole rubble circle of arc；
Step 2: the box for being equipped with venthole and feed opening being used with cement in different ways cementitious in a fixed length
On the anchoring section of the solid anchor pole of big projecting thread of degree；
Step 3: the expansion cement slurry of certain proportion swelling agent, and the screw thread that box will be stained with are injected in box feed opening
In the solid anchor pole insertion cylinder bore of shape, there is the multistage anchor cable first sample for expanding head to be formed；
Step 4: while being injected by the way of segmenting slip casting in the gap of the solid anchor pole of shape of threads and drilling common mixed
Solidifying soil, the anchoring section of anchor pole are irrigated in two times with non-anchored section, first fill anchoring section, use high grade water in anchoring section
Mud carries out pressure grouting, after it has some strength, non-anchored section of Reperfu- sion, and in non-anchored Duan Zeyong low grade
Cement mortar is simultaneously not pressurized, and is irrigated；
Step 5: after slurry reaches the 70 ~ 80% of design strength, protection processing being carried out to non-anchored section of exposed anchor pole.
The diameter of cylinder bore is 5-50cm, depth 1-50m in the step 1, and cylinder bore can contain underground water；
Microexplosion mold is high-strength material production in the step 1, can bear microexplosion effect, the loosening hole rubble circle
It is arc-shaped, and the strength reduction of hole rubble circle place palisades is loosened, there is large-scale hole.
Box is with cementitious or be weldingly fixed on anchor pole in the step 2；
The multistage expansion that the box on anchor pole full of expansion cement slurry forms different arrangement modes is bonded in the step 3
Head, increases the anchor force of anchoring section, and it is with certain weight and volume, using two telescopic tripod apparatus by anchor
Bar is put into cylinder bore.
The waterproof material box that expansion cement slurry is injected in step 3 has waterproof ability, can be used for that there are groundwater conditions
Under cylinder bore the pulling force of anchor pole is separated into pressure at this point, being welded with backing plate on the upside of box, improve its withdrawal resistance.
The method have the advantages that:
1, the expansion cement slurry box being bonded on anchor pole can automatically form hemispherical expansion head, i.e. increase anchoring body and ground
The contact area of body also makes to generate biggish confining pressure stress around anchoring body, to about can be improved 2-5 times compared to common bolt
Withdrawal resistance, and anchoring cost can be greatlyd save.
2, waterproof material box has waterproof effect, therefore can be used for the bolt anchorage of the following Rock And Soil of level of ground water.
3, proposed by the present invention that there is the automatic Pulling-Resistant Anchor Rod for expanding head, it is applicable to soft rock mass, is also applied for rubble body,
It is applied widely.
4, under water construct when on the upside of expansion cement slurry box composition backing, the pulling force on anchor pole can be separated into pressure
Power becomes and draws as pressure, improves the withdrawal resistance of common bolt.
5, the big projecting thread spiral thread on anchor bolt anchor pole used, rising height are the 1/5 of bolt diameter, can become the drawing of anchor pole
Power is pressure, improves the withdrawal resistance of anchor pole.
6, expansion cement slurry can reinforce the density of expansion cement slurry using box is poured into advance.
7, the automatic classification on common bolt expands head and can be selected according to practical geological condition, and it is automatic can to form one or more levels
Head is expanded in classification.
8, ring-shaped box with holes can be made dismountable template and use, cost-saved.
9, microexplosion is just expanded and the secondary expansion of expansion cement slurry forms bigger expansion head, and concrete slurry is made to penetrate into palisades
In, anchoring body can be made to be combined into one with rock mass, increase anchoring area, greatly improve anti-pulling of anchor bar.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
The automatic classification that symmetry is arranged under Fig. 1 anhydrous condition expands the microexplosion of head Pulling-Resistant Anchor Rod and expands head schematic diagram.
Microexplosion result enlarged diagram at A in Fig. 2 Fig. 1.
The automatic classification of symmetrical box arrangement expands head Pulling-Resistant Anchor Rod structural schematic diagram main view under Fig. 3 anhydrous condition.
The automatic classification of symmetrical box arrangement expands the final schematic diagram main view of head Pulling-Resistant Anchor Rod structure under Fig. 4 anhydrous condition.
The automatic classification that spiral shape box is arranged under Fig. 5 anhydrous condition expands head Pulling-Resistant Anchor Rod structural schematic diagram main view.
The automatic classification that spiral shape box is arranged under Fig. 6 anhydrous condition expands the final schematic diagram main view of head Pulling-Resistant Anchor Rod structure
Figure.
Fig. 7 has the automatic classification expansion head Pulling-Resistant Anchor Rod structural schematic diagram main view of symmetrical box arrangement in the case of water.
The automatic classification of symmetrical box arrangement expands head Pulling-Resistant Anchor Rod structural schematic diagram sectional view under Fig. 8 anhydrous condition.
The automatic classification of annular box expands head Pulling-Resistant Anchor Rod structural schematic diagram sectional view under Fig. 9 anhydrous condition.
Figure 10 tripod transport device schematic diagram.
In figure: 1- anchor pole, 2- box, 3- expansion cement slurry, 4- normal concrete, 5- cylinder bore, non-anchored section of 6-, 7-
Anchoring section, 8- backing plate, 9- water, 10- electric cap, 11- loosen hole rubble circle, 12- microexplosion mold.
Specific embodiment
Embodiments of the present invention are described further with reference to the accompanying drawing.
Embodiment 1:
One, such as Fig. 3 shows a kind of structure and application method that automatic classification expands head Pulling-Resistant Anchor Rod.It is by shape of threads anchor pole
1, polyethylene material box 2, expansion cement slurry 3 and normal concrete 4 are constituted.The anchoring of this architecture in the absence of water
Environment.Follow the steps below anchoring construction:
Step 1: drilling through diameter on Rock And Soil with drilling machine is 10cm, the cylinder bore 5 of deep 3m, by microexplosion mold 12
Electric cap 10 carries out fixed point microexplosion such as Fig. 1 to cylinder bore 5, so that palisades is formed the loosening hole rubble circle 11 of arc, such as Fig. 2 institute
Show；
Step 2: taking diameter is 2cm, and the shape of threads anchor pole 1 of long 3.5m, the size of polyethylene material box 2 is long 4cm, wide
2cm, high 4cm；
Step 3: venthole will be equipped with and the polyethylene material box 2 of feed opening is be bonded in a manner of symmetry arrangement with cement
On the solid anchor pole of shape of threads, as shown in Figure 8；
Step 4: injecting the expansion cement slurry 3 that bulking agent levels are 30% in 2 feed opening of polyethylene material box and will glue
There is the solid anchor pole of the shape of threads of box, be inserted into cylinder bore 5, there is the multistage anchor cable first sample for expanding head to be formed；
Step 5: while being injected by the way of segmenting slip casting in the gap of the solid anchor pole 1 of shape of threads and cylinder bore 5
Normal concrete 4, the anchoring section 7 of Pulling-Resistant Anchor Rod are irrigated in two times with non-anchored section 6, first fill anchoring section 7, have one to it
After determining intensity, non-anchored section 6 of Reperfu- sion, anchoring section 7 and non-anchored section of 6 clear-cuts, anchoring section 7 using the high cement of grade into
Row pressure grouting, and perfusion is not pressurized with the cement mortar of low grade at non-anchored section 6；
Step 6: after grouting body reaches the 75% of design strength, protection processing being carried out to non-anchored section of 6 exposed anchor poles.
Two, by using above-mentioned operating method, the concrete box of expansion can form four sides in the same section of anchoring section 7
The multistage of extruding expands head anchor cable, as shown in figure 4, can significantly increase between anchor pole and concrete, concrete and palisades
Frictional force greatly improves the withdrawal resistance of anchor pole so that the single pulling force of anchor pole be dispersed.
Symmetry box arrangement mode might have the generation of anchor stress concentration phenomenon.
Embodiment 2:
One, another structure and application method that automatic classification expands head Pulling-Resistant Anchor Rod is shown in FIG. 5.It is equally by spiral shell
Line anchor pole 1, polyethylene material box 2, expansion cement slurry 3 and normal concrete 4 are constituted.This architecture is in the absence of water
Anchoring environment.Follow the steps below anchoring construction:
Step 1: drilling through diameter on Rock And Soil with drilling machine is 15cm, the cylinder bore of deep 3m, by microexplosion mold 12
Electric cap 10 carries out fixed point microexplosion to cylinder bore, and palisades is made to form the loosening hole rubble circle 11 of arc；
Step 2: taking diameter is 5cm, and the shape of threads anchor pole 1 of long 3.5m, the size of polyethylene material box 2 is long 5cm, wide
5cm, high 5cm；
Step 3: using cement with the space spiral shell on same section in the polyethylene material box 2 for being equipped with venthole and feed opening
The mode of rotation type arrangement is bonded on the solid anchor pole 1 of shape of threads；
Step 4: injecting the expansion cement slurry 3 that bulking agent levels are 45% in 2 feed opening of polyethylene material box and will glue
There is the solid anchor pole of the shape of threads of box, be inserted into cylinder bore, there is the multistage anchor cable first sample for expanding head to be formed；
Step 5: while being injected by the way of segmenting slip casting in the gap of the solid anchor pole 1 of shape of threads and palisades 5 common
Concrete 4, the anchoring section 7 of Pulling-Resistant Anchor Rod are irrigated in two times with non-anchored section 6, first fill anchoring section 7, are had to it certain strong
After degree, non-anchored section 6 of Reperfu- sion, anchoring section 7 and non-anchored section of 6 clear-cuts are pressed in anchoring section 7 using high-quality cement
Power grouting, and with the cement mortar of low grade and be not pressurized at non-anchored section 6, it is irrigated；
Step 6: after grouting body reaches the 75% of design strength, protection processing being carried out to non-anchored section of 6 exposed anchor poles.
Two, the concrete box expanded can form spiral multistage expansion head anchor cable in anchoring section 7, as shown in fig. 6, can be very
The frictional force of big degree increased between anchor pole and concrete, concrete and palisades, thus by the single pulling force of shape of threads anchor pole 1 point
It dissipates, greatly improves the withdrawal resistance of anchor pole.
The polyethylene material box 2 of the perfusion expansion cement slurry 3 of spatially spiral type arrangement arrangement can be by the bulbs of pressure point
It dissipates, prevents the phenomenon that stress is concentrated.
Embodiment 3:
One, another structure and application method of the multistage pulling force distributing Pulling-Resistant Anchor Rod for expanding head is shown in FIG. 7.It
It is made of threaded anchor rod 1, polyethylene material box 2, expansion cement slurry 3, backing plate 8 and normal concrete 4.This architecture exists
There is the anchoring environment under groundwater condition.Follow the steps below anchoring construction:
Step 1: drilling through diameter on Rock And Soil with drilling machine is 15cm, the cylinder bore of deep 3m；
Step 2: taking diameter is 5cm, and the shape of threads anchor pole 1 of long 3.5m, the size of polyethylene material box 2 is long 5cm, wide
5cm, high 5cm；
Step 3: using cement with the symmetrical row on same section in the polyethylene material box 2 for being equipped with venthole and feed opening
The mode of cloth is bonded on the solid anchor pole 1 of shape of threads, and Fig. 8 gives the diagrammatic cross-section at this, and in polyethylene material box 2
Top increase the backing plate 8 of welding, common steel plate can be used in backing plate 8, and steel plate can prevent expansion cement slurry box vertical direction
Deformation；
Step 4: injecting the expansion cement slurry 3 that bulking agent levels are 45% in 2 feed opening of polyethylene material box and will glue
There is the solid anchor pole of the shape of threads of box, in Fig. 2 insertion cylinder bore, there is the multistage anchor cable first sample for expanding head to be formed；
Step 5: while normal concrete 4 is injected in the gap of non-anchored section of anhydrous threaded anchor rod 1 and palisades 5
Step 6: after grouting body reaches the 75% of design strength, protection processing being carried out to non-anchored section of 6 exposed anchor poles.
Two, the concrete box expanded can form the more of four sides extruding in the same section of anchoring section 7 full of underground water
Grade expands head anchor cable, can significantly increase the frictional force between anchor pole and concrete, concrete and palisades, while the list on anchor pole
One pulling force is separated into multistage pressure by the steel plate on box, becomes and draws into pressure, to greatly improve the withdrawal resistance of anchor pole, significantly
Raising anchor pole withdrawal resistance.
This embodiment can be used for the case where full of underground water, can effectively solve the anchorage problem of water-filling rock mass.
Annular polyethylene material box 2 with holes can also be equally used, sectional view is as shown in figure 9, concrete construction method
As upper embodiment, this will not be repeated here.Due to not showing dilatancy when 3 initial set of expansion cement slurry, therefore use annular with holes
Polyethylene material box 2 can dismantle reuse after 3 initial set of expansion cement slurry.
Through the above description, those skilled in the art completely can be in the model without departing from this invention technical idea
In enclosing, various changes and amendments are carried out all within protection scope of the present invention.Unaccomplished matter of the invention, belongs to ability
The common knowledge of field technique personnel.
Claims (6)
1. a kind of automatic classification for reinforcing soft rock mass expands head Pulling-Resistant Anchor Rod, it is characterised in that: it includes using microexplosion mold
(12) the loosening hole rubble circle (11) that fixed point microexplosion is formed is carried out to cylinder bore (5), the cylinder bore (5) passes through drilling machine
It drills through on rock mass, is equipped with anchor pole (1) inside the cylinder bore (5), is fixed with multiple boxes on the outer wall of the anchor pole (1)
Sub (2), the box (2) match with the loosening hole rubble circle (11) in cylinder bore (5), pour inside box (2)
Have expansion cement slurry (3), the anchor pole (1) is divided into non-anchored section (6) and anchoring section (7), non-anchored section (6) and anchoring section
(7) internal to have poured normal concrete (4), the anchoring section (7) is one section where box (2)；
The box (2) is made of waterproof material, and feed opening and venthole are provided on box (2), and the feed opening is big
In venthole；The diameter of feed opening is 2-5cm, and the diameter of venthole is 1-3cm；
The box (2) use polyethylene material box, the box (2) it is symmetrical or it is asymmetrical be arranged on anchor pole (1),
And multistage expansion head anchor cable is formed in loosening hole rubble circle (11) position under the action of expansion cement slurry (3)；
The box (2) is bonded on anchor pole (1) using spiral, or is surround and be connected to using circular box with holes
On anchor pole (1), and circular box is reusable, to expansion cement slurry (3) initial set, i.e., detachable to reuse.
2. a kind of automatic classification for reinforcing soft rock mass according to claim 1 expands head Pulling-Resistant Anchor Rod, it is characterised in that: institute
Microexplosion mold (12) is stated to be matched with the electric cap (10) of installation inside it to the cylinder bore progress explosion on rock mass.
3. a kind of automatic classification for reinforcing soft rock mass according to claim 1 expands head Pulling-Resistant Anchor Rod, it is characterised in that: institute
Anchor pole (1) is stated using the solid anchor pole of shape of threads, glass fibre anchor pole, reinforced anchor bolt or Anchor cable-rod.
4. the automatic classification that soft rock mass is reinforced described in claim 1-3 any one expands the application method of head Pulling-Resistant Anchor Rod,
Be characterized in that, it the following steps are included:
Step 1: the cylinder bore (5) of certain diameter is drilled through on Rock And Soil with drilling machine, with microexplosion mold (12) to cylinder bore
(5) fixed point microexplosion is carried out, palisades is made to form the loosening hole rubble circle (11) of arc；
Step 2: the box (2) for being equipped with venthole and feed opening being used with cement in different ways cementitious in certain length
The solid anchor pole of big projecting thread anchoring section on；
Step 3: injecting the expansion cement slurry (3) of certain proportion swelling agent in box (2) feed opening, and box (2) will be stained with
Shape of threads solid anchor pole insertion cylinder bore (5) in, there is the multistage anchor cable first sample for expanding head to be formed；
Step 4: while normal concrete is injected by the way of segmenting slip casting in the gap of the solid anchor pole of shape of threads and drilling
(4), the anchoring section (7) of anchor pole (1) is irrigated in two times with non-anchored section (6), is first filled anchoring section (7), is adopted in anchoring section (7)
Pressure grouting is carried out with high grade cement, after it has some strength, non-anchored section of Reperfu- sion (6), and non-anchored
Section (6) then with the cement mortar of low grade and is not pressurized, and is irrigated；
Step 5: after slurry reaches the 70 ~ 80% of design strength, protection processing being carried out to non-anchored section of (6) exposed anchor pole；
Box (2) is with cementitious or be weldingly fixed on anchor pole (1) in the step 2；
It is bonded in the box (2) on anchor pole (1) full of expansion cement slurry (3) in the step 3 and forms different arrangement modes
Multistage expands head, the anchor force of anchoring section (7) is increased, and it is with certain weight and volume, using two telescopic three feet
Anchor pole (1) is put into cylinder bore (5) by rack device.
5. the automatic classification according to claim 4 for reinforcing soft rock mass expands the application method of head Pulling-Resistant Anchor Rod, feature
It is, the diameter of cylinder bore (5) is 5-50cm, depth 1-50m in the step 1, and cylinder bore (5) can contain underground
Water；
Microexplosion mold (12) is high-strength material production in the step 1, can bear microexplosion effect, the loosening hole rubble circle
(11) arc-shaped, and the strength reduction of hole rubble circle (11) place palisades is loosened, there is large-scale hole.
6. the automatic classification according to claim 1 for reinforcing soft rock mass expands the application method of head Pulling-Resistant Anchor Rod, feature
It is, the waterproof material box (2) that expansion cement slurry (3) are injected in step 3 has waterproof ability, can be used for that there are underground regimens
The pulling force of anchor pole (1) is separated into pressure at this point, being welded with backing plate (8) on the upside of box (2) by the cylinder bore (5) under condition
Power improves its withdrawal resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810113828.6A CN108386217B (en) | 2018-02-05 | 2018-02-05 | A kind of the automatic classification expansion head Pulling-Resistant Anchor Rod and its application method of reinforcing soft rock mass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810113828.6A CN108386217B (en) | 2018-02-05 | 2018-02-05 | A kind of the automatic classification expansion head Pulling-Resistant Anchor Rod and its application method of reinforcing soft rock mass |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108386217A CN108386217A (en) | 2018-08-10 |
| CN108386217B true CN108386217B (en) | 2019-07-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810113828.6A Active CN108386217B (en) | 2018-02-05 | 2018-02-05 | A kind of the automatic classification expansion head Pulling-Resistant Anchor Rod and its application method of reinforcing soft rock mass |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109487804A (en) * | 2018-12-06 | 2019-03-19 | 中铁二院工程集团有限责任公司 | The low disturbance reinforcement protection system of red soft rock cut slope and construction method |
| CN112064635B (en) * | 2020-09-08 | 2021-07-16 | 长沙理工大学 | Anchoring structure capable of automatically feeding back stratum information and performing multiple repairs and anchoring and repairing method |
| CN113639908B (en) * | 2021-06-24 | 2023-06-30 | 广西北投交通养护科技集团有限公司 | Stress detection method for multi-section self-adaptive expansion anchor rod |
| CN113718767B (en) * | 2021-09-22 | 2023-03-31 | 三峡大学 | Eccentric hook-shaped expansion type pre-stressed anchoring structure and anchoring method thereof |
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| CN205329688U (en) * | 2016-01-12 | 2016-06-22 | 山东科技大学 | Resistance -increasing slip casting stock |
| CN206667247U (en) * | 2017-04-01 | 2017-11-24 | 三峡大学 | Large dosage expanding cement paddle recoverable anchor pole for temporary supporting |
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| DE2431113A1 (en) * | 1974-06-28 | 1976-01-15 | Takechi Komusho Kk | Ground anchor for retaining wall support - is inserted by boring tool with expanding cutters and can be removed |
| CN104074190A (en) * | 2014-06-16 | 2014-10-01 | 成都四海岩土工程有限公司 | Secondary high-pressure grouting expansion bit anchor rod and construction method thereof |
| CN203891020U (en) * | 2014-06-17 | 2014-10-22 | 厉瑞祥 | Bundled type slurry pocket grouting anchor rod |
| CN104278674A (en) * | 2014-09-22 | 2015-01-14 | 华汇工程设计集团股份有限公司 | Recyclable expansion anchor rod and construction method thereof |
| CN104912073A (en) * | 2015-06-24 | 2015-09-16 | 王帆 | High-pressure grouting bag type expansion anchor bolt with sleeve valve tube |
| CN205329688U (en) * | 2016-01-12 | 2016-06-22 | 山东科技大学 | Resistance -increasing slip casting stock |
| CN206667247U (en) * | 2017-04-01 | 2017-11-24 | 三峡大学 | Large dosage expanding cement paddle recoverable anchor pole for temporary supporting |
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Application publication date: 20180810 Assignee: Hubei Hongzhuo Architectural Design Co.,Ltd. Assignor: CHINA THREE GORGES University Contract record no.: X2023980043461 Denomination of invention: An automatic grading expansion head anti pull anchor rod for strengthening weak rock masses and its use method Granted publication date: 20190709 License type: Exclusive License Record date: 20231019 |
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