CN108386217A - 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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- CN108386217A CN108386217A CN201810113828.6A CN201810113828A CN108386217A CN 108386217 A CN108386217 A CN 108386217A CN 201810113828 A CN201810113828 A CN 201810113828A CN 108386217 A CN108386217 A CN 108386217A
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- 239000011435 rock Substances 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 15
- 239000004568 cement Substances 0.000 claims abstract description 43
- 238000004873 anchoring Methods 0.000 claims abstract description 42
- 239000002002 slurry Substances 0.000 claims abstract description 36
- 239000000463 material Substances 0.000 claims abstract description 28
- 239000004567 concrete Substances 0.000 claims abstract description 21
- 239000002689 soil Substances 0.000 claims abstract description 13
- 238000012545 processing Methods 0.000 claims abstract description 6
- 239000004698 Polyethylene Substances 0.000 claims description 18
- 229920000573 polyethylene Polymers 0.000 claims description 17
- -1 polyethylene Polymers 0.000 claims description 16
- 239000007787 solid Substances 0.000 claims description 15
- 238000005553 drilling Methods 0.000 claims description 14
- 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
- 230000015271 coagulation Effects 0.000 claims description 3
- 238000005345 coagulation Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 230000008961 swelling Effects 0.000 claims description 3
- 230000009471 action Effects 0.000 claims description 2
- 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
- 230000009467 reduction Effects 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
- 239000010959 steel Substances 0.000 description 4
- 239000004067 bulking agent Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000003673 groundwater 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
- 230000007812 deficiency Effects 0.000 description 2
- 230000010412 perfusion Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 208000002565 Open Fractures Diseases 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 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
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000004570 mortar (masonry) 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 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
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
- E21D20/021—Grouting with inorganic components, e.g. cement
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- 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)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The present invention discloses a kind of the automatic classification expansion head Pulling-Resistant Anchor Rod and its application method of reinforcing soft rock mass, and anchor pole is made of big projecting thread anchor pole with the box being bonded on anchor pole, and expansion cement slurry is housed in box.This approach includes the following steps：Step 1：Drill 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 noted in box；Step 4：Anchor pole is stretched into hole, the segmentation injection normal concrete in anchor pole and palisades gap；Step 5：Exposed anchor pole protection processing.The present invention propose it is a kind of can underwater construction reinforce off-load soft rock mass simple construction method, 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 technology
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 deficiency, 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 is combined with anchor pole, the withdrawal resistance of anchor pole is greatly improved using the lateral expansion of expansion cement slurry, and reduce material cost,
Maximized economic benefit is striven for.
（Patent publication No.：CN101538856A）Disclose a kind of construction method of enlarged footing anchor pole, drill hole of drilling machine is to waiting for
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 is enlarged 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 drilling 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）Disclose 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,
There are the arc-shaped protrusions that spring connects in anchor bar body both sides.Though above-mentioned anchor pole expansion is various, 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 being full of lower regimen condition greatly, can not use.
（Patent publication No.：CN104278674A）A kind of construction method of recyclable expansion head anchor pole is disclosed, 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.
Invention content
It is an object of the invention in view of the drawbacks of the prior art with deficiency, provide it is a kind of it is simple in structure can underwater construction
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 by drilling machine on rock mass, 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 mortar, the anchor pole are divided into non-anchored section and anchoring section, and common coagulation has been poured 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 more than
Venthole；A diameter of 2-5cm of feed opening, a diameter of 1-3cm of venthole.
The box body use polyethylene material box, the box body it is symmetrical or it is asymmetrical be arranged on anchor pole, and
Under the action of expansion cement slurry multistage expansion head anchor cable is formed in loosening hole rubble circle position.
The box body is bonded in using spiral on anchor pole, or is surround using circular box with holes and be connected to anchor
On bar, and circular box is reusable, waits for expansion cement slurry initial set, you can dismounting is reused.
The automatic classification for reinforcing soft rock mass expands the application method of head Pulling-Resistant Anchor Rod, it includes the following steps：
Step 1：The cylinder bore for drilling through certain diameter on Rock And Soil with drilling machine, pinpoints cylinder bore with microexplosion mold
Microexplosion makes palisades form the loosening hole rubble circle of arc；
Step 2：By the box equipped with venthole and feed opening with cement in different ways with cementitious in certain length
On the anchoring section of the solid anchor pole of big projecting thread；
Step 3：The expansion cement slurry of certain proportion swelling agent is injected in box feed opening, and the shape of threads for being stained with box is real
Heart anchor pole is inserted into cylinder bore, has the multistage anchor cable first sample for expanding head to be formed；
Step 4：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 simultaneously,
The anchoring section of anchor pole is irrigated at twice with non-anchored section, first fills anchoring section, anchoring section using high grade cement into
Row pressure grouting, after it has some strength, non-anchored section of Reperfu- sion, and the cement of low grade is then used at non-anchored section
Mortar is simultaneously not pressurized, and is irrigated；
Step 5：After slurry reaches the 70 ~ 80% of design strength, protection processing is carried out to non-anchored section of exposed anchor pole.
A diameter of 5-50cm of cylinder bore, depth 1-50m in the step 1, and cylinder bore can contain underground water；
Microexplosion mold makes for high-strength material in the step 1, can bear microexplosion effect, and the loosening hole rubble circle is in arc
Shape, 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 head that the box full of expansion cement slurry on anchor pole forms different arrangement modes is bonded in the step 3,
The anchor force of anchoring section is increased, and it is with certain weight and volume, using two telescopic tripod apparatus by anchor pole
It 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, that is, increase anchoring body and Rock And Soil
Contact area also makes to generate larger confining pressure stress around anchoring body, to compared to common bolt about can be improved 2-5 times resist
Pull out force, 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 make dismountable template and use, cost-saved.
9, microexplosion is just expanded and the secondary expansion of expansion cement slurry forms the expansion head of bigger, 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.
Description of the drawings
The invention will be further described with reference to the accompanying drawings and examples.
The automatic classification that symmetry is arranged under Fig. 1 anhydrous conditions expands head Pulling-Resistant Anchor Rod microexplosion 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 front view under Fig. 3 anhydrous conditions.
The automatic classification of symmetrical box arrangement expands the final schematic diagram front view of head Pulling-Resistant Anchor Rod structure under Fig. 4 anhydrous conditions.
The automatic classification that spiral shape box is arranged under Fig. 5 anhydrous conditions expands head Pulling-Resistant Anchor Rod structural schematic diagram front view.
The automatic classification that spiral shape box is arranged under Fig. 6 anhydrous conditions 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 front 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 conditions.
The automatic classification of annular box expands head Pulling-Resistant Anchor Rod structural schematic diagram sectional view under Fig. 9 anhydrous conditions.
Figure 10 tripod transport device schematic diagrames.
In figure：1- anchor poles, 2- boxes, 3- expansion cement slurries, 4- normal concretes, 5- cylinder bores, non-anchored section of 6-, 7-
Anchoring section, 8- backing plates, 9- water, 10- electric caps, 11- loosen hole rubble circle, 12- microexplosion molds.
Specific implementation mode
Embodiments of the present invention are described further below in conjunction with the accompanying drawings.
Embodiment 1：
One, such as Fig. 3 shows that automatic classification expands a kind of structure and application method of head Pulling-Resistant Anchor Rod.It is by shape of threads anchor pole 1, poly-
Ethylene material box 2, expansion cement slurry 3 and normal concrete 4 are constituted.The anchoring ring of this architecture in the absence of water
Border.Follow the steps below anchoring construction：
Step 1：A diameter of 10cm is drilled through on Rock And Soil with drilling machine, the cylinder bore 5 of deep 3m passes through electric thunder in microexplosion mold 12
Pipe 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, as shown in Figure 2；
Step 2：Taking a diameter of 2cm, 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：Polyethylene material box 2 equipped with venthole and feed opening is bonded in spiral shell with cement in a manner of symmetry arrangement
On the solid anchor pole of line shape, as shown in Figure 8；
Step 4：The expansion cement slurry 3 that bulking agent levels are 30% is injected in 2 feed opening of polyethylene material box and will be stained with box
The solid anchor pole of shape of threads of son is inserted into cylinder bore 5, has the multistage anchor cable first sample for expanding head to be formed；
Step 5：It is injected by the way of segmenting slip casting in the gap in the solid anchor pole 1 of shape of threads with cylinder bore 5 simultaneously common
Concrete 4, the anchoring section 7 of Pulling-Resistant Anchor Rod are irrigated at twice with non-anchored section 6, first fill anchoring section 7, and it is certain strong to wait for that it has
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 the high cement of grade
Power is in the milk, and is not pressurized perfusion 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 is 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 7 same section of anchoring section
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 to disperse the single pulling force of anchor pole.
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 threaded anchor
Bar 1, polyethylene material box 2, expansion cement slurry 3 and normal concrete 4 are constituted.The anchor of this architecture in the absence of water
Gu environment.Follow the steps below anchoring construction：
Step 1：A diameter of 15cm is drilled through on Rock And Soil with drilling machine, the cylinder bore of deep 3m passes through electric thunder in microexplosion mold 12
Pipe 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 a diameter of 5cm, 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：Cement will be used with the spatially spiral type on same section equipped with the polyethylene material box 2 of venthole and feed opening
The mode of arrangement is bonded on the solid anchor pole of shape of threads 1；
Step 4：The expansion cement slurry 3 that bulking agent levels are 45% is injected in 2 feed opening of polyethylene material box and will be stained with box
The solid anchor pole of shape of threads of son is inserted into cylinder bore, has the multistage anchor cable first sample for expanding head to be formed；
Step 5：Common coagulation is injected by the way of segmenting slip casting in the gap in the solid anchor pole 1 of shape of threads with palisades 5 simultaneously
Soil 4, the anchoring section 7 of Pulling-Resistant Anchor Rod is irrigated at twice with non-anchored section 6, is first filled anchoring section 7, is waited for that it has some strength
Afterwards, non-anchored section 6 of Reperfu- sion, anchoring section 7 and non-anchored section of 6 clear-cuts carry out pressure in anchoring section 7 using high-quality cement
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 is 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, to divide the single pulling force of shape of threads anchor pole 1
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
The phenomenon that dissipating, preventing stress concentration.
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 is by spiral shell
Line anchor pole 1, polyethylene material box 2, expansion cement slurry 3, backing plate 8 and normal concrete 4 are constituted.This architecture is having ground
Anchoring environment in the case of lower water.Follow the steps below anchoring construction：
Step 1：A diameter of 15cm, the cylinder bore of deep 3m are drilled through on Rock And Soil with drilling machine；
Step 2：Taking a diameter of 5cm, 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：Cement will be used with the symmetry arrangement on same section equipped with the polyethylene material box 2 of venthole and feed opening
Mode is bonded on the solid anchor pole of shape of threads 1, and Fig. 8 gives the diagrammatic cross-section at this, and in the upper of polyethylene material box 2
Common steel plate can be used in the backing plate 8 of Fang Zengjia welding, backing plate 8, and steel plate can prevent the change of expansion cement slurry box vertical direction
Shape；
Step 4：The expansion cement slurry 3 that bulking agent levels are 45% is injected in 2 feed opening of polyethylene material box and will be stained with box
The solid anchor pole of shape of threads of son has the multistage anchor cable first sample for expanding head if Fig. 2 is inserted into cylinder bore to be formed；
Step 5：Normal concrete 4 is injected in the gap of non-anchored section of anhydrous threaded anchor rod 1 and palisades 5 simultaneously
Step 6：After grouting body reaches the 75% of design strength, protection processing is 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 7 same section of anchoring section 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 technological thought
In enclosing, various changes and amendments are carried out all within protection scope of the present invention.The unaccomplished matter of the present invention, belongs to ability
The common knowledge of field technique personnel.
Claims (10)
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）To cylinder bore（5）Carry out the loosening hole rubble circle that fixed point microexplosion is formed（11）, the cylinder bore（5）Pass through drilling machine
It drills through on rock mass, the cylinder bore（5）Inside is equipped with anchor pole（1）, the anchor pole（1）Outer wall on be fixed with multiple boxes
Body（2）, the box body（2）With cylinder bore（5）Interior loosening hole rubble circle（11）It matches, in box body（2）Inside pours
There is expansion cement slurry（3）, the anchor pole（1）It is divided into non-anchored section（6）And anchoring section（7）, described non-anchored section（6）And anchoring section
（7）Inside has poured normal concrete（4）, the anchoring section（7）For box body（2）One section of place.
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
State microexplosion mold（12）With the electric cap of installation inside it（10）It matches and explosion is carried out to the cylinder bore 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
State anchor pole（1）Using the solid anchor pole of shape of threads, glass fibre anchor pole, reinforced anchor bolt or Anchor cable-rod.
4. 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
State box body（2）It is made of waterproof material, in box body（2）On be provided with feed opening and venthole, the feed opening is more than outlet
Hole；A diameter of 2-5cm of feed opening, a diameter of 1-3cm of venthole.
5. a kind of automatic classification for reinforcing soft rock mass according to claim 1 or 4 expands head Pulling-Resistant Anchor Rod, feature exists
In：The box body（2）Using polyethylene material box, the box body（2）It is symmetrical or asymmetrical be arranged in anchor pole（1）On,
And in expansion cement slurry（3）Under the action of loosen hole rubble circle（11）Position forms multistage expansion head anchor cable.
6. a kind of automatic classification for reinforcing soft rock mass according to claim 1 or 4 expands head Pulling-Resistant Anchor Rod, feature exists
In：The box body（2）Anchor pole is bonded in using spiral（1）On, or surround and be connected to using circular box with holes
Anchor pole（1）On, and circular box is reusable, waits for expansion cement slurry（3）Initial set, you can dismounting is reused.
7. the automatic classification that soft rock mass is reinforced described in claim 1-6 any one expands the application method of head Pulling-Resistant Anchor Rod,
It is characterized in that, it includes the following steps：
Step 1：The cylinder bore of certain diameter is drilled through on Rock And Soil with drilling machine（5）, with microexplosion mold（12）To cylinder bore
（5）Fixed point microexplosion is carried out, palisades is made to form the loosening hole rubble circle of arc（11）；
Step 2：By the box equipped with venthole and feed opening（2）With cement in different ways with cementitious in certain length
The solid anchor pole of big projecting thread（1）Anchoring section on；
Step 3：In box（2）The expansion cement slurry of certain proportion swelling agent is injected in feed opening（3）, and box will be stained with（2）
The solid anchor pole of shape of threads（1）It is inserted into cylinder bore（5）In, there is the multistage anchor cable first sample for expanding head to be formed；
Step 4：Simultaneously in the solid anchor pole of shape of threads（1）With common coagulation is injected in the gap of drilling by the way of segmenting slip casting
Soil（4）, anchor pole（1）Anchoring section（7）With non-anchored section（6）It is irrigated at twice, first fills anchoring section（7）, in anchoring section（7）
Pressure grouting, after it has some strength, non-anchored section of Reperfu- sion are carried out using high grade cement（6）, and non-anchor
Gu section（6）It then with the cement mortar of low grade and is not pressurized, is irrigated；
Step 5：After slurry reaches the 70 ~ 80% of design strength, to non-anchored section（6）Exposed anchor pole carries out protection processing.
8. the automatic classification according to claim 7 for reinforcing soft rock mass expands the application method of head Pulling-Resistant Anchor Rod, feature
It is, cylinder bore in the step 1（5）A diameter of 5-50cm, depth 1-50m, and cylinder bore（5）Underground can be contained
Water；
Microexplosion mold in the step 1（12）It is made for high-strength material, microexplosion effect, the loosening hole rubble circle can be born
（11）It is arc-shaped, and loosen hole rubble circle（11）The strength reduction of place palisades has large-scale hole.
9. the automatic classification according to claim 7 for reinforcing soft rock mass expands the application method of head Pulling-Resistant Anchor Rod, feature
It is, box in the step 2（2）With cementitious or be weldingly fixed on anchor pole（3）On；
It is bonded in anchor pole in the step 3（1）It is upper to be full of expansion cement slurry（3）Box（2）Form different arrangement modes
Multistage expands head, increases anchoring section（7）Anchor force, and it is with certain weight and volume, using two telescopic three feet
Rack device is by anchor pole（1）It is put into cylinder bore（5）In.
10. the automatic classification according to claim 7 for reinforcing soft rock mass expands the application method of head Pulling-Resistant Anchor Rod, feature
It is, expansion cement slurry is injected in step 3（3）Waterproof material box（2）With waterproof ability, it can be used for that there are underground regimens
Cylinder bore under condition（5）, at this point, in box（2）Upside be welded with backing plate（8）, by anchor pole（1）Pulling force be separated into pressure
Power improves its withdrawal resistance.
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| CN112064635A (en) * | 2020-09-08 | 2020-12-11 | 长沙理工大学 | Anchoring structure capable of automatically feeding back stratum information and performing multiple repairs and anchoring and repairing method |
| CN113639908A (en) * | 2021-06-24 | 2021-11-12 | 广西北投交通养护科技集团有限公司 | Multi-section self-adaptive expansion anchor rod stress detection method |
| CN113718767A (en) * | 2021-09-22 | 2021-11-30 | 三峡大学 | Eccentric hook-shaped expansion type pre-stressed anchoring structure and anchoring method thereof |
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| CN113718767A (en) * | 2021-09-22 | 2021-11-30 | 三峡大学 | Eccentric hook-shaped expansion type pre-stressed anchoring structure and anchoring method thereof |
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| CN108386217B (en) | 2019-07-09 |
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