CN105736025A - Anti-breakage anchor rod - Google Patents
Anti-breakage anchor rod Download PDFInfo
- Publication number
- CN105736025A CN105736025A CN201610071692.8A CN201610071692A CN105736025A CN 105736025 A CN105736025 A CN 105736025A CN 201610071692 A CN201610071692 A CN 201610071692A CN 105736025 A CN105736025 A CN 105736025A
- Authority
- CN
- China
- Prior art keywords
- anchor rod
- free section
- anchor pole
- reinforcing bar
- 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.)
- Granted
Links
- 239000011435 rock Substances 0.000 claims abstract description 20
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 16
- 239000010959 steel Substances 0.000 claims abstract description 16
- 230000003014 reinforcing effect Effects 0.000 claims description 36
- 230000006378 damage Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 239000002689 soil Substances 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003245 coal Substances 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
- 230000002265 prevention Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 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
- E21D21/0013—Protection against corrosion
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
-
- 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
- E21D21/0033—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts having a jacket or outer tube
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Geochemistry & Mineralogy (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Paleontology (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
- Piles And Underground Anchors (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Abstract
The invention discloses an anti-breakage anchor rod. By the adoption of the anti-breakage anchor rod, the problem that an anchor rod fails immediately due to the fact that an anchor rod free section steel bar is broken is solved. The anti-breakage anchor rod comprises an anchor rod body (7). A nut (2) and a steel plate tray (3) tightly attached to the wall of surrounding rock are arranged at the end of an anchor rod tail bar (1). The steel plate tray (3) is pressed by the nut (2). An anchor rod free section steel bar (4) is arranged on the middle section of the anchor rod body (7), and a sleeve (5) connected to the anchor rod free section steel bar (4) in a sleeving mode through threads is arranged on the anchor rod free section steel bar (4). The anti-breakage anchor rod has the advantage that the supporting capacity of the anchor rod can be maintained under the condition that the anchor rod free section steel bar is broken due to the fact that the anchor rod bears the ultimate tension.
Description
Technical field
The invention belongs to the protective equipment of civil engineering, be specifically related to a kind of anchor pole, be applied to tunnel and tunnel disaster prevention, or be applied to the engineerings such as slope retaining.
Background technology
Anchorage technology in Geotechnical Engineering is application anchor pole or rock mass is reinforced by anchor cable, and it plays the stabilizing power of Rock And Soil self fully, be a kind of protolith disturbance is little, speed of application is fast, safe and reliable, be cost-effective reinforcement technique again.Anchor pole can actively reinforce Rock And Soil, effectively controls its deformation, it is prevented that the fall damage of Rock And Soil, the various advantages of bolt support technology, makes bolt support technology become the main support pattern in Geotechnical Engineering field.
But in actual engineering, bolt support technology there is also many deficiencies: failure by shear at sliding surface place or joint plane place of destruction that the common failure mode of anchor pole has the tensile bearing capacity of anchor pole not enough and causes, anchor pole and Rock And Soil destroy.Anchor pole damages the destruction mainly having anchor pole to be pulled off the faying face bond damage of destruction, reinforcing bar and grouting body, the grouting body faying face bond damage with Rock And Soil and grouting body.Owing to the elongation percentage of anchor pole reinforcing bar self is low, occur small deformation to be just likely pulled off, and anchor pole is once be pulled off under limit stress, then whole Bolt System will lose efficacy, and this can bring, to engineering, the loss that can not estimate.Even more serious person perhaps can create greater casualties event, affects the safety in production in colliery or the normal construction of Other Engineering.
Summary of the invention
For prior art Shortcomings, the technical problem to be solved is just to provide the anchor pole that a kind of tension is disconnected, and it can at free section reinforcing bar it may happen that when being pulled off, keep safely and effectively suspension roof support.
The technical problem to be solved is realized by such technical scheme, it includes anchor pole, the end of anchor pole foot piece is with nut and the steel plate pallet being close to country rock wall, nut pushes down steel plate pallet, anchor pole interlude is free section reinforcing bar, the sleeve of useful screw thread socket on free section reinforcing bar.
Due to the sleeve of useful screw thread socket on free section reinforcing bar, sleeve has protection and tension energy-absorbing dual-use function, improves the support capacity of anchor pole.When anchor pole tension is less, sleeve can protect free section reinforcing bar not by the corrosion of rock environment, thus extending the service life of anchor pole；When anchor pole under tension very big and cause free section reinforcing bar exceed yield limit be pulled off time, sleeve on free section reinforcing bar just plays interconnection function by sleeve lining screw thread and being engaged of anchor pole screw thread steel, makes anchor pole can continue to play support action.
Owing to have employed technique scheme, present invention have the advantage that: anchor pole is when bearing ultimate tension and free section reinforcing bar is pulled off, suspension roof support ability can be maintained, the burst fire-disasters such as common ground supporting, slope retaining, tunnel rock burst and coal mine rock burst can be played effective buffering and governance role.
Accompanying drawing explanation
The accompanying drawing of the present invention illustrates as follows:
Fig. 1 is the structural representation of the present invention；
In figure: 1. anchor pole foot piece；2. nut；3. steel plate pallet；4. free section reinforcing bar；5. sleeve；6. outer sleeve；7. anchor pole；8. weld zone.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described:
As shown in Figure 1, the present invention includes anchor pole 7, and the end of anchor pole foot piece 1 is with nut 2 and the steel plate pallet 3 being close to country rock wall, and nut 2 pushes down steel plate pallet 3, anchor pole 7 interlude is free section reinforcing bar 4, is cased with the sleeve 5 of disposed thread on free section reinforcing bar 4.
It is cased with outer sleeve 6 as it is shown in figure 1, pass through in the periphery of sleeve 5, is connected by weld zone 8 fixing between outer sleeve 6 with free section reinforcing bar 4.The effect of outer sleeve 6 mainly has: 1, when anchor pole reinforcing bar is not pulled off, and has cohesive force between outer sleeve 6 and injecting cement paste, and this cohesive force can share the pulling force suffered by reinforcing bar；2, when free section reinforcing bar is pulled off, because not connecting together between sleeve 5 and outer sleeve, that is sleeve 5 is not by the constraint of outer sleeve 6, after such reinforcing bar is pulled off, reinforcing bar can continue power transmission under the effect of sleeve pipe 5, simultaneously as threadeding between sleeve pipe 5 and reinforcing bar, to a certain extent, 2 sections, the front and back of fracture reinforcing bar can occur certain displacement to meet the displacement of rock.
When installing and using the present invention, according to standard anchor bolt construction operation, anchor pole, adjusting nut 2 are installed, make the present invention be in tension state.When pulling force is less, the present invention is consistent with the operation principle of conventional anchor, but sleeve 5 and free section reinforcing bar 4 can produce gmatjpdumamics to a certain extent, and sleeve 5 plays the effect that protection free section reinforcing bar is not corroded by rock surrounding simultaneously；But mainly still relying upon the bonding force between anchor pole 7 and grouting body and frictional force, free section reinforcing bar 4 plays the effect of transmission pulling force.
When rock deformation is little, free section reinforcing bar 4 can be subjected to displacement and rely on the gmatjpdumamics between reinforcing bar and sleeve 5 to consume part energy in sleeve 5, improves tensile property, and this embodies anchor pole of the present invention and absorbs the effect of energy.
When country rock produces moderate finite deformation, such as rock burst etc., steel plate pallet 3 is subject to country rock extrapolability more than the friction of rest power between the present invention and country rock, and now, the gmatjpdumamics of sleeve 5 and free section reinforcing bar 4 can resist a part of pulling force.When anchor pole tension is more than reinforcing bar ultimate tension, now free section reinforcing bar 4 is likely to be pulled off.But owing to free section reinforcing bar 4 is connected with sleeve 5, now sleeve 5 can increase with the gmatjpdumamics of free section reinforcing bar 4, and sleeve 5 connects two sections of reinforcing bars that front and back are pulled off, and therefore, under the assosting effect of sleeve 5, anchor pole still can play support action.Such anchor system still can play a role, and avoids anchor pole to a certain extent because free section reinforcing bar 4 is pulled off and lost efficacy immediately.
Claims (2)
1. the anchor pole that a tension is disconnected, include anchor pole (7), the end of anchor pole foot piece (1) is with nut (2) and the steel plate pallet (3) being close to country rock wall, nut (2) pushes down steel plate pallet (3), anchor pole (7) interlude is free section reinforcing bar (4), it is characterized in that: at the sleeve (5) of the upper useful screw thread socket of free section reinforcing bar (4).
2. the anchor pole that tension according to claim 1 is disconnected, is characterized in that: pass through in the periphery of sleeve (5) and be cased with outer sleeve (6), is connected fixing between outer sleeve (6) with free section reinforcing bar (4) by weld zone (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610071692.8A CN105736025B (en) | 2016-02-02 | 2016-02-02 | A kind of anchor pole that tension is disconnected |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610071692.8A CN105736025B (en) | 2016-02-02 | 2016-02-02 | A kind of anchor pole that tension is disconnected |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105736025A true CN105736025A (en) | 2016-07-06 |
| CN105736025B CN105736025B (en) | 2019-03-19 |
Family
ID=56245612
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610071692.8A Active CN105736025B (en) | 2016-02-02 | 2016-02-02 | A kind of anchor pole that tension is disconnected |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105736025B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108756974A (en) * | 2018-04-25 | 2018-11-06 | 中国地质大学（武汉） | A kind of novel anti-shearing large deformation anchor rod |
| CN109339840A (en) * | 2018-11-13 | 2019-02-15 | 重庆大学 | A kind of antitorque large deformation anchor rod |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4850746A (en) * | 1987-04-18 | 1989-07-25 | Dyckerhoff & Widmann Aktiengesellschaft | Rock anchor assembly for securing roadways and wall surfaces of open cuts and tunnels |
| CN201531030U (en) * | 2009-09-23 | 2010-07-21 | 招商局重庆交通科研设计院有限公司 | Slidable anchorage device for controlling anchoring force |
| CN102286975A (en) * | 2011-07-06 | 2011-12-21 | 武汉大学 | Constant-resistance energy-absorbing anchor rod for strengthening large-deformation rock body |
| CN103321222A (en) * | 2013-05-24 | 2013-09-25 | 郭财宝 | Recoverable type anchor rod, pressure-bearing plate type anchor pile and anchoring method |
| CN203515628U (en) * | 2013-10-08 | 2014-04-02 | 尤洛卡矿业安全工程股份有限公司 | Friction-type constant-resistance large-deformation anchor rod |
| CN104631454A (en) * | 2015-01-29 | 2015-05-20 | 山东大学 | Inverted wedge type recoverable anchor rod |
| CN204941584U (en) * | 2015-09-29 | 2016-01-06 | 汤锐 | A kind of coupling for anchor bars |
-
2016
- 2016-02-02 CN CN201610071692.8A patent/CN105736025B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4850746A (en) * | 1987-04-18 | 1989-07-25 | Dyckerhoff & Widmann Aktiengesellschaft | Rock anchor assembly for securing roadways and wall surfaces of open cuts and tunnels |
| CN201531030U (en) * | 2009-09-23 | 2010-07-21 | 招商局重庆交通科研设计院有限公司 | Slidable anchorage device for controlling anchoring force |
| CN102286975A (en) * | 2011-07-06 | 2011-12-21 | 武汉大学 | Constant-resistance energy-absorbing anchor rod for strengthening large-deformation rock body |
| CN103321222A (en) * | 2013-05-24 | 2013-09-25 | 郭财宝 | Recoverable type anchor rod, pressure-bearing plate type anchor pile and anchoring method |
| CN203515628U (en) * | 2013-10-08 | 2014-04-02 | 尤洛卡矿业安全工程股份有限公司 | Friction-type constant-resistance large-deformation anchor rod |
| CN104631454A (en) * | 2015-01-29 | 2015-05-20 | 山东大学 | Inverted wedge type recoverable anchor rod |
| CN204941584U (en) * | 2015-09-29 | 2016-01-06 | 汤锐 | A kind of coupling for anchor bars |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108756974A (en) * | 2018-04-25 | 2018-11-06 | 中国地质大学（武汉） | A kind of novel anti-shearing large deformation anchor rod |
| CN109339840A (en) * | 2018-11-13 | 2019-02-15 | 重庆大学 | A kind of antitorque large deformation anchor rod |
| CN109339840B (en) * | 2018-11-13 | 2024-03-05 | 重庆大学 | Anti-torsion large-deformation anchor rod |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105736025B (en) | 2019-03-19 |
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