CN209444358U - Overall length bonds large deformation pressure-relieving achor bar - Google Patents
Overall length bonds large deformation pressure-relieving achor bar Download PDFInfo
- Publication number
- CN209444358U CN209444358U CN201820727395.9U CN201820727395U CN209444358U CN 209444358 U CN209444358 U CN 209444358U CN 201820727395 U CN201820727395 U CN 201820727395U CN 209444358 U CN209444358 U CN 209444358U
- Authority
- CN
- China
- Prior art keywords
- rod
- large deformation
- head
- anchorage head
- corrugated sleeve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The utility model discloses a kind of overall lengths to bond large deformation pressure-relieving achor bar, and anchor pole mainly includes expansion anchorage head, the body of rod, corrugated sleeve, pallet and damping nut.The hollow cylinder that anchorage head is inwall processing coarse-pitch thread is expanded, is divided into expandable portion and non-enlarged portion by boundary of circumferential groove；Rod end threading, tail portion setting increase resistance head；Corrugated sleeve includes clamp, bellows segment and flat segments, is recessed outside bellows segment and is filled by rubber deformation layer；The body of rod is connect with sleeve using interference, and sleeve flat segments are arranged external screw thread and install pallet and damping nut；Certain prestressing force can be formed after the rockbolt installation, and larger allow is provided and presses distance and continuous work resistance, can effectively be kept the stability of large deformation country rock, be avoided the generation of roof fall accident.
Description
Technical field
The utility model relates to a kind of overall lengths to bond large deformation pressure-relieving achor bar, belong to geotechnical engineering anchorage technology field.
Background technique
Suspension roof support is that a kind of pair of protolith disturbs that small, speed of application is fast, safe and reliable, economical rationality reinforcement technique, energy
The bearing capacity for enough giving full play to Rock And Soil itself is widely used in mine construction and underground chamber construction.
The anchor pole wide variety applied in mine and geotechnical engineering at present, and respectively have its advantage and disadvantage.Wherein, overall length is viscous
Knot anchor pole can effectively provide anchor force when any point deforms in anchoring range, while also have certain shearing resistance
Ability, but certain allowing can not be provided and press distance, it is not suitable for large deformation surrounding rock supporting, while realizing entirely using grouting method
Long bonding, constructs complicated, the period is long；Large deformation anchor rod can guarantee to allow when large deformation occurs in tunnel simultaneously presses distance and supporting
Resistance effectively safeguards the stability of large deformation country rock, but limited to the support capacity of weak broken wall rock, and the body of rod is also easy to produce
Raw corrosion failure；Prestressed anchor can effectively control back sinking, reduce surrounding rock separation layer and sliding, improve the steady of tunnel
It is qualitative, it can be difficult to country rock is allowed to generate certain deformation, it is not suitable for large deformation surrounding rock supporting.
Such as: Chinese invention patent CN105715287A discloses a kind of combination Self-propelling grouting anchoring-bolt, exists in the anchor pole
Anchor head and hollow grouting anchor body process multiple injected holes, and barb-like screw thread is arranged to increase on hollow grouting anchor body front bar surface
Add anchor force.But the body of rod processes multiple injected holes, reduces lever strength；In addition, it is difficult to which country rock is allowed to generate certain become
Shape is not suitable for large deformation surrounding rock supporting；Meanwhile full length fastening is realized using grouting mode, complicated for operation, time-consuming.
Chinese utility model patent CN203230446U discloses a kind of swollen shell-type prestressing force coal mine energy-absorbing support anchor rod, should
Anchor pole has stronger deformability by setting wave energy-absorbing section bent stick, is suitable for high stress large deformation rock mass coal mine.But
It is that the body of rod is easy to be corroded by substances such as water, reduces anchor rod body intensity, shorten the service life of anchor pole.
Chinese invention patent CN102808635A discloses a kind of swollen shell-type Inner bolt head prestressed anchor and its installs and uses
Method, which is provided with cone core and the swollen shell of pyramidal structure in Inner bolt head and cone angle is identical, is provided on swollen shell symmetrical logical
Slot, when use, can significantly improve the prestressing force that anchor-holding force of anchor bolt and anchor pole can apply with the swollen shell of spreading.But the body of rod holds
Easily corroded by substances such as water, causes corrosion failure；In addition, it is difficult to allow compressive strain, it is not suitable for large deformation surrounding rock supporting.
The pros and cons that above-mentioned anchor pole respectively has, it should develop a kind of novel anchor rod for effectively combining these three types of anchor pole advantages, reach
There is the purpose of large deformation country rock in more preferable supporting.
Utility model content
The purpose of this utility model is to combine a variety of anchor pole advantages to provide a kind of simple overall length bonding large deformation of structure to allow
Anchor pole is pressed, certain prestressing force can be formed after the rockbolt installation, and larger allow is provided and presses distance and continuous work resistance, it can be effective
The stability for keeping large deformation breaking surrounding rock, avoids the generation of roof fall accident.
The utility model overall length bonding large deformation pressure-relieving achor bar construction are as follows: by expansion anchorage head, the body of rod, corrugated sleeve,
Pallet and damping nut composition；The expansion anchorage head is the hollow cylinder that inwall processing has coarse-pitch thread, with circumferential groove
It is divided into expandable portion and non-enlarged portion for boundary；The rod end is machined with the external screw thread connecting with expansion anchorage head, tail portion
It is provided with increasing resistance head；The corrugated sleeve includes clamp, bellows segment and flat segments, and the outer depressed section of bellows segment is by rubber deformation
Layer filling, sleeve flat segments are arranged external screw thread and install pallet and damping nut；Before installing anchor pole, the body of rod and sleeve should first carry out group
Dress.
Pressure resistance and frictional resistance moment are allowed to increase resistance head in the body of rod and point being formed, and the increasing resistance head of body of rod tail portion passes through plunging
Or temperature differential method and corrugated sleeve carry out interference connection, and increasing resistance head is made just to contact corrugated sleeve bellows segment.
In order to avoid the substance for causing the body of rod to corrode enters inside corrugated sleeve, using marine glue or grout off radiation fins
Cylinder flat segments end.
To make main rod body more preferably enter anchorage head expandable portion, the expansion anchorage head is machined at the top of not enlarged portion
Four rectangular notches；Processing has the gap among expandable portion, every two groove.
It is more preferable to realize overall length bonding in order to guarantee that the slow setting resin into anchorage head cavity flows back into anchor hole, in expansion anchor
Gu the head whole body is equipped with four symmetrical vertical grooves.
In order to more preferably apply prestressing force, the body of rod external thread section length is identical as anchorage head expandable portion, diameter
Less than main rod body diameter, with 45 ° of cone angle transition and linkages of main rod body, the sum of main rod body radius and expansion anchorage head wall thickness are greater than anchor hole
Radius；After main rod body rotates into anchorage head expandable portion, make every gap that anchorage head expandable portion is set and groove
Between continuous hangnail piece be close to anchor hole wall, larger anchor force is provided.
In order to avoid binder enters inside corrugated sleeve, the gap between the corrugated sleeve clamp and the body of rod is used
Low-intensity glue blocks.
To make well adapting to property of the utility model, the corrugated segment length is that maximum allows pressure amount, can foundation
The suitable length of different project situation processing；Pressure resistance is allowed in addition, changing corrugated sleeve wall thickness and can adjust, it can be according to live real
Border flexible choice sleeve wall thickness.
The construction method of the utility model overall length bonding large deformation pressure-relieving achor bar are as follows: when construction, will first expand anchorage head, foot
The slow setting resin explosive roll of amount is sequentially placed into anchor hole；Then, the body of rod being completed and corrugated sleeve are inserted into anchor hole, in flat segments
Pallet, damping nut are successively installed；Then, damping nut is connect with Pneumatic anchor rod fitting machine, damping due to rotation nut driven rod
Body rotation squeezes stirring powder stick, diffuses to slow setting resin in anchor hole, form adhesive layer between anchor pole and anchor hole wall；Work as bar
When body contacts anchorage head, anchorage head generates frictional force by rectangular notch and anchor hole floor rocks, can between the body of rod and anchorage head
To relatively rotate；While body of rod external thread section enters anchorage head not expandable portion, main rod body just starts spreading anchorage head
Expandable portion, hangnail piece are close to anchor hole inner wall, form anchor force；Finally, torque is opened when the body of rod is rotated to expansion anchorage head bottom
Begin to increase, after increasing to a certain extent, damping plug falls off, and damping nut is relatively rotated with the body of rod；Continue to rotate nut, spiral shell
Mother compresses pallet and applies prestressing force simultaneously, and prestressing force size should be less than corrugated sleeve and increase the pressure resistance that allows between resistance head.
The working deformation principle of the utility model overall length bonding large deformation pressure-relieving achor bar: after rockbolt installation, with enclosing
The deformation of rock, when active force be more than increase resistance head and corrugated sleeve between allow pressure resistance when, increase resistance head start with corrugated sleeve
Now opposite sliding；Increase after resistance head enters corrugated section, squeeze bellows segment inner wall, rubber deformation layer compressed, bellows segment with
The deformation of country rock is gradually separated with adhesive layer；It can control by using the corrugated sleeve of different wall thickness and allow pressure resistance；Head is hindered when increasing
Sleeve ends are slid into, increasing resistance head can not continue to slide under the action of sleeve ends clamp, reach the maximum allowable pressure that allows at this time
Amount；The length of corrugated sleeve bellows segment can be designed according to the actual situation, control the maximum allowable deflection of country rock.
The advantages of the utility model overall length bonding large deformation pressure-relieving achor bar, is:
1, anchor bar body and water etc. easily cause the substance of corrosion to completely cut off, and avoid causing lever strength to decline because of corrosion, extend anchor
The service life of bar；In addition, anchor rod pallet board is only subjected to the loosening force of part rock mass, compared with part adhesive or end-fixed bolter,
The power that pallet is subjected to can be much smaller；
2, overall length bonding is realized by slow setting resin explosive roll, it is more labor-saving compared with grouted anchor bar, it operates more convenient；Separately
Outside, using slow setting resin material, compared to cement mortar, the time for forming enough cohesive forces is also shorter；
3, hangnail piece in anchorage head periphery can be close to anchor hole inner wall, form larger just anchor-hold and improve convenient for applying prestressing force
Supporting effect；
4, corrugated sleeve bellows segment can be gradually disengaged during surrouding rock deformation with adhesive layer, viscous compared to traditional overall length
Tie class anchor pole, the utility model can be realized in the state that overall length bonds allows compressive strain, effectively combine whole-length cohesive anchor bolt and
The advantages of large deformation anchor rod；
5, there are frictional resistance between increasing resistance head and corrugated sleeve, when the active force that surrouding rock deformation generates is more than that friction hinders
Power will appear therebetween relative motion, discharges country rock internal energy, avoids body of rod stress in country rock small deformation excessive and disconnected
It splits；
6, corrugated section evagination top metal part is contacted with adhesive layer, since rubber material is transmitted less than metal material
Cohesive force, although corrugated sleeve diameter is big, provide cohesive force than stretch out sleeve mobile jib body portion it is small；Therefore, ripple
Section has partial metallic contact, helps to reduce the bonding gap edge between the body of rod and sleeve.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Fig. 2 is the corrugated sleeve schematic diagram of the utility model.
Fig. 3 is the expansion anchorage head side schematic three dimensional views of the utility model.
Marginal data: 1- damping nut；2- damping plug；3- pallet；4- increases resistance head；5- rubber deformation layer；6- corrugated sleeve；
The 7- body of rod；8- expands anchorage head；9- adhesive layer；10- flat segments；11- bellows segment；12- clamp；13- main rod body；14- hangnail piece；
15- rectangular notch；The gap 16-；17- vertical groove；18- circumferential groove；19- not enlarged portion；20- expandable portion.
Specific embodiment
The utility model provides a kind of overall length bonding large deformation pressure-relieving achor bar, to make the purpose of this utility model, technical side
Case and effect are clearer, clear, and specific embodiment of the present utility model is described in detail below in conjunction with attached drawing.
Overall length bonding large deformation pressure-relieving achor bar as shown in Figure 1 is by expansion anchorage head 8, the body of rod 7, corrugated sleeve 6, pallet 3
It is formed with damping nut 1.The expansion anchorage head 8 is the hollow cylinder that inwall processing has coarse-pitch thread, and cylinder outer diameter is slightly smaller
In anchor hole diameter, divided by the circumferential groove 18 that surface is arranged for expandable portion 20 and not enlarged portion 19；Cylinder whole body design four
Symmetrical vertical groove 17, main function are that the slow setting resin resided in expansion anchorage head 8 is made to be back to anchor hole；Do not expand
It opens and rectangular notch 15 is set at the top of portion 19, make to expand anchorage head 8 and anchor hole floor rocks generate certain frictional force, the body of rod 7 can
It is relatively rotated with anchorage head 8,19 length of enlarged portion is not 20mm~30mm for setting, mainly for guaranteeing enough anchor forces；It can
20 length of enlarged portion should be 40mm~60mm not less than not enlarged portion 19, setting 20 length of expandable portion, in expandable portion 20, often
Gap 16 is set among two vertical grooves 17, several hangnail pieces 14 are set between every gap 16 and vertical groove 17, make to lead
The body of rod 13 is easier to see Fig. 3 into anchorage head expandable portion 20().
Anchor rod body 7 is solid metal, and end is machined with the external screw thread to match with expansion 8 coarse-pitch thread of anchorage head, outside
Reach and expandable portion 20 are consistent；Main rod body 13 and male thread portion are had a diameter larger than outer by 45 ° of cone angle transition and linkages
Threaded portion, the sum of 13 radius of main rod body and expansion 8 wall thickness of anchorage head are greater than anchor hole radius, when 7 male thread portion of the body of rod rotates
Into anchorage head not enlarged portion 19 when, main rod body 13 is just into anchorage head not enlarged portion 20, spreading anchorage head, and hangnail piece 14 is tight
Anchor hole wall is pasted, larger anchor force is provided, applies prestressing force convenient for the later period；Tail portion setting increases resistance head 4, and diameter is flat slightly larger than sleeve
Straight section internal diameter；Increasing resistance head 4 carries out interference connection by plunging or temperature differential method and corrugated sleeve 6, and increasing resistance head 4 is made just to contact wave
6 bellows segment 11 of line sleeve, main function are to increase resistance 4 part of head in the body of rod 7 and formed and allow pressure resistance and frictional resistance moment.
Anchor pole corrugated sleeve 6 includes clamp 12, bellows segment 11 and flat segments 10, and wherein clamp 12 is arranged in sleeve ends,
It can prevent the body of rod 7 from completely disengaging sleeve；The outer depressed section of bellows segment 11 is filled and led up by rubber deformation layer 5, can allow for bellows segment
11 are deformed, and realization is progressively disengaged with binder, the length is mainly allowing press distance, can add according to different project situations
The suitable length of work, such as: in coal mine roadway with large deformation, rock deformation can be set up to 500~600mm, 11 length of bellows segment
It is set to 600mm；External screw thread is arranged in flat segments 10, sees Fig. 2 for installing damping nut 1()；In the assembling body of rod 7 and corrugated sleeve 6
When, using 10 end of marine glue or 6 flat segments of grout off corrugated sleeve, main function is the object for avoiding the corrosion of the body of rod 7
Matter enters inside corrugated sleeve 6；In addition, the change of 6 wall thickness of corrugated sleeve is adjustable to allow pressure resistance size, it can be according to practical work
Condition flexible choice sleeve wall thickness.Pallet 3 and damping nut 1 are mounted on 6 flat segments 10 of corrugated sleeve, and 1 tail portion of damping nut is equipped with
Damping plug 2, main function are to make corrugated sleeve 6 and damping nut 1 under certain torque without relative rotation.
When construction, expansion anchorage head 8, enough slow setting resin explosive rolls are first sequentially placed into anchor hole；Then, it will be completed
The body of rod 7 and corrugated sleeve 6 be inserted into anchor hole, pallet 3, damping nut 1 are successively installed in flat segments 10；Then, by damping nut 1
It is connect with Pneumatic anchor rod fitting machine, damping due to rotation nut 1 drives the body of rod 7 to rotate, and squeezes stirring powder stick, diffuses to slow setting resin
In anchor hole, adhesive layer 9 is formed between anchor pole and anchor hole wall；When the body of rod 7 contacts expansion anchorage head 8, anchorage head 8 is at top
Frictional force is generated with anchor hole floor rocks under the action of rectangular notch 15, can be relatively rotated between the body of rod 7 and anchorage head 8；?
1 external thread section of the body of rod enter anchorage head not enlarged portion 19 while, main rod body 13 just starts spreading anchorage head expandable portion 20,
Hangnail piece 14 is close to anchor hole inner wall, forms anchor force；Finally, torque starts to increase when the rotation of the body of rod 7 is to expansion 8 bottom of anchorage head
Greatly, after increasing to a certain extent, damping plug 2 falls off, and damping nut 1 is relatively rotated with the body of rod 7；Nut 1 is continued to rotate, is pressed
Tight pallet 3 applies prestressing force simultaneously, and prestressing force size should be less than corrugated sleeve 6 and increase the pressure resistance that allows between resistance head 4.
Claims (4)
1. a kind of overall length bonds large deformation pressure-relieving achor bar, it is by expansion anchorage head, the body of rod, corrugated sleeve, pallet and damping spiral shell
Mother's composition, which is characterized in that the expansion anchorage head is the hollow cylinder that inwall processing has coarse-pitch thread, is with circumferential groove
Boundary is divided into expandable portion and non-enlarged portion；The rod end is machined with the outer spiral shell to match with expansion anchorage head coarse-pitch thread
Line, tail portion are provided with increasing resistance head；The corrugated sleeve includes clamp, bellows segment and flat segments, the outer depressed section quilt of bellows segment
The filling of rubber deformation layer, flat segments are arranged external screw thread and install pallet and damping nut；Before installing anchor pole, the body of rod and corrugated sleeve are first
It is assembled.
2. overall length as described in claim 1 bonds large deformation pressure-relieving achor bar, which is characterized in that the expansion anchorage head whole body
Equipped with four symmetrical vertical grooves；There are four rectangular notches for processing at the top of not enlarged portion；In expandable portion, every two groove
Centre processing has the gap, and continuous hangnail piece is arranged between every gap and groove.
3. overall length as described in claim 1 bonds large deformation pressure-relieving achor bar, which is characterized in that the body of rod external screw thread segment length
Degree is identical as anchorage head expandable portion, and diameter is less than main rod body diameter, with 45 ° of cone angle transition and linkages of main rod body；Main rod body half
The sum of diameter and expansion anchorage head wall thickness are greater than anchor hole radius.
4. overall length as described in claim 1 bonds large deformation pressure-relieving achor bar, which is characterized in that the corrugated sleeve clamp with
Gap between the body of rod is blocked using low-intensity glue；Corrugated segment length is that maximum allows pressure amount, can be according to different project situations
The suitable length of processing；Pressure resistance is allowed in addition, changing corrugated sleeve wall thickness and can adjust, it can be according to the practical flexible choice set in scene
Barrel is thick.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820727395.9U CN209444358U (en) | 2018-05-16 | 2018-05-16 | Overall length bonds large deformation pressure-relieving achor bar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820727395.9U CN209444358U (en) | 2018-05-16 | 2018-05-16 | Overall length bonds large deformation pressure-relieving achor bar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209444358U true CN209444358U (en) | 2019-09-27 |
Family
ID=68007894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820727395.9U Active CN209444358U (en) | 2018-05-16 | 2018-05-16 | Overall length bonds large deformation pressure-relieving achor bar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209444358U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108343458A (en) * | 2018-05-16 | 2018-07-31 | 山东科技大学 | Overall length bonds large deformation pressure-relieving achor bar and its construction method |
-
2018
- 2018-05-16 CN CN201820727395.9U patent/CN209444358U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108343458A (en) * | 2018-05-16 | 2018-07-31 | 山东科技大学 | Overall length bonds large deformation pressure-relieving achor bar and its construction method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108343458A (en) | Overall length bonds large deformation pressure-relieving achor bar and its construction method | |
| CN202596756U (en) | Shell-expanding high-strength grouting bolt | |
| CN201103397Y (en) | Yielding deformed steel bar slip-casting anchor bar | |
| CN109723480A (en) | Tension and compression coupling for country rock large deformation, which allows, presses energy-absorbing grouted anchor bar and working method | |
| CN109057840A (en) | Adaptive grouting and reinforcing anchor pole and its anchoring construction method under a kind of high stress | |
| CN102094662B (en) | Friction sleeve type large deformation anchor rod | |
| CN103133026A (en) | Novel expansion shell inverted wedge type grouting anchor rod | |
| CN103410543A (en) | Pressure yielding internally-grouted anchor cable | |
| CN111764940B (en) | Double-layer primary supporting structure of weak surrounding rock tunnel and construction method thereof | |
| CN201943725U (en) | Friction sleeve type large-deformation anchor rod | |
| CN110331998B (en) | Self-adaptive pressure relief type grouting anchor rod | |
| CN101994315B (en) | Full-length adhesive prestressed anchor rod and construction method thereof | |
| CN104405424A (en) | Full-length-anchoring anchor rod and anchoring method | |
| CN102808635B (en) | A kind of swollen shell-type Inner bolt head prestressed anchor and installation and application thereof | |
| CN203230443U (en) | Novel case expanding reverse wedging type slip casting anchor rod | |
| CN209444358U (en) | Overall length bonds large deformation pressure-relieving achor bar | |
| CN212803288U (en) | Yielding anchor rod capable of being bonded in full length | |
| CN206053978U (en) | A kind of new expansion grouted anchor bar | |
| CN206706752U (en) | One kind expansion breaks formula recoverable anchor rod | |
| CN211816217U (en) | Prestressed hollow anchor rod reinforcing system | |
| CN111379581B (en) | Deep roadway prestress full-anchor support construction equipment and construction method thereof | |
| CN202936792U (en) | Expansion shell type internal anchor head pre-stressed anchor | |
| CN212153367U (en) | Sleeve type variable-diameter steel reinforcement cage and expanded anchor rod pile | |
| CN209557024U (en) | A kind of anchoring assembly of expansion anchor rod | |
| CN205189918U (en) | Intumescent cavity slip casting stock |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |