CN103774652A - Pre-stressed anchor rod capable of preventing from being pulled out from anchor eye along opening - Google Patents
Pre-stressed anchor rod capable of preventing from being pulled out from anchor eye along opening Download PDFInfo
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- CN103774652A CN103774652A CN201210412800.5A CN201210412800A CN103774652A CN 103774652 A CN103774652 A CN 103774652A CN 201210412800 A CN201210412800 A CN 201210412800A CN 103774652 A CN103774652 A CN 103774652A
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- anchor
- anchor rod
- rod body
- bowl
- expansible stopper
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Abstract
The invention relates to a pre-stressed anchor rod capable of preventing from being pulled out from an anchor eye along an opening. The pre-stressed anchor rod comprises an anchor rod body with the bottom end being provided with an expansion toothed bowl, an expansion plug with the center being provided with an expansion plug center hole, a cushioning table, a cushioning plate and a nut. Anchor rod holes are formed both in the cushioning table and the cushioning plate. The top end of the anchor rod body sequentially penetrates through the expansion plug center hole, the anchor rod hole of the cushioning table and the anchor rod hole of the cushioning plate and then is connected together with the nut. The expansion plug is arranged inside the expansion toothed bowl. The pre-stressed anchor rod is simple in structure, low in cost and convenient to construct, a novel tension-pressure-plug composite pre-stressed anchor system is established, the anchor rod together with a grouting body can be prevented from being pulled out from the anchor eye, and therefore the stability of rock and earth mass, the security of engineering and the durability of anchoring are improved.
Description
Technical field
The present invention relates to Anchorage Technology, relate in particular to and smoothly prevent the prestressed anchor extracted from anchor hole.
Background technology
At present, ground anchorage is by being embedded in the anchor pole in stratum, stratum is locked together tightly, rely on the interaction of anchor pole-injecting cement paste-hole wall ground muscle power, transfer and improve self intensity and self-stable ability of Rock And Soil, to improve stress state, guarantee the stable of outside Rock And Soil, thereby guarantee the technology of engineering safety.The engineering application of Anchorage Technology started from for 19 end of the centurys, along with the development of its theory and technology, the departments such as mine, water conservancy, water power, highway, railway, municipal administration, urban construction, geology, military project are now extended to, as a kind of comparatively desirable support form, in slope project, underground construction, deep-foundation pit engineering, obtain extensive use, in national economy major project, bring into play key effect.
Ground anchorage is not only subject to the impact of formation lithology, Rock-soil Mass Structure, geological structure, hydrogeology, topography and geomorphology etc., also may be subject to the effect of violent earthquake, and they all constitute a threat to the safety of ground anchorage.
At construction and the run duration of ground anchorage, anchor pole extract from anchor hole together with injecting cement paste be the most substantially, the most typical, the most general ground anchorage mode of failure, it will cause ground anchorage to lose efficacy, and bring hidden danger to engineering safety, thus the anchored force that restriction anchor pole can provide.Thereby, when the anchored force that need to provide when Rock And Soil is larger, common bolt anchoring can not meet the requirement of engineering, restricting Anchorage Technology application and development, how to improve the load pass through mechanism of ground anchorage, overcome the drawback of common anchoring, become the fundamental way that improves anchor-holding force of anchor bolt, improves anchoring effect.
In addition, injecting cement paste almost can not provide anchored force at the anchoring initial stage, thereby can not adapt to the requirement of needs supporting immediately after weak rocks soil body excavation.Although existing pipe-seam type anchor rod overcomes to some extent to above-mentioned shortcoming, after rockbolt installation, can provide immediately anchored force, be conducive to control in time the distortion of Rock And Soil, the anchored force that anchor pole can provide is little; Meanwhile, because soft rock-soil cognition is clamp-oned tube chamber from the pipe seam of pipe-seam type anchor rod, cause the reduction of anchored force.
Summary of the invention
Technical problem to be solved by this invention is to provide and a kind of can improve and anchored force is provided immediately, the prestressed anchor that smoothly the preventing of saving material, easy construction extracted from anchor hole.
For addressing the above problem, the prestressed anchor extracted from anchor hole of smoothly preventing of the present invention, is characterized in that: it comprises that bottom is provided with the expansible stopper of expansible stopper centre bore and pad platform, backing plate, nut with anchor rod body, the center of expansion tooth bowl; On described pad platform and described backing plate, be equipped with bolthole; The top of described anchor rod body connects together with described nut through the bolthole of described expansible stopper centre bore, described pad platform and described backing plate successively; Described expansible stopper is placed in described expansion tooth bowl.
Described expansion tooth bowl is little bowl-shape in mouthful large end, and its opening upwards, blurts out, and is circumferentially being spacedly distributed and the tooth being connected at the bottom of bowl; The inner surface of described tooth is distributed with multiple annular platforms.
Described expansible stopper is truncated cone-shaped, and the inner surface of its side and described tooth coincide.
The top of described anchor rod body is provided with screw thread.
On described backing plate, have an injected hole.
The present invention compared with prior art has the following advantages:
1, the present invention first passes anchor rod body top the expansible stopper of center with through hole, until by expansible stopper be pushed into anchor rod body bottom with expansion tooth bowl in, the frustum cone side of expansible stopper and the inner surface of expansion tooth bowl tooth are coincide, then be placed in boring in company with anchor rod body, until by anchor rod body bottom with expansion tooth bowl be pushed into boring the end, by being enclosed within expansible stopper that pipe on anchor rod body orders about truncated cone-shaped to close at the bottom of expansion tooth bowl time, the teeth directional surrounding of extrusion expansion tooth bowl is opened, and be pressed in borehole wall Rock And Soil, while stopping pipe applied thrust, the inner surface annular platform that the expansible stopper of anchor rod body bottom is inflated tooth bowl tooth blocks, still keep expansion tooth bowl teeth directional surrounding to open embolism among borehole wall Rock And Soil.Take out after pipe, add upper padding plate on anchor pole top, even if also anchor pole top is through the bolthole at backing plate center, and fastening nut, anchor rod body applies prestressing force to side slope Rock And Soil.
2, the present invention by injected hole on backing plate to the interior filling and injecting slurry body of holing, injecting cement paste after fixed by with the expansion tooth bowl of anchor rod body and bottom thereof, and expansible stopper is consolidated in one tightly, in the time of slope ground body deformability, by anchor rod body to the passive generation anchored force of side slope Rock And Soil.
3, the present invention optimizes and has improved the load pass through mechanism of ground anchorage significantly, build pulling force-pressure-embolism NEW TYPE OF COMPOSITE prestress anchoraging system, can effectively prevent that anchor pole from extracting from anchor hole together with injecting cement paste, be anchor pole together with injecting cement paste along destroying with the contact interface of Rock And Soil, improve significantly rock-reinforcing effect, transfer better the self-stable ability of Rock And Soil, thereby improved the safety of stability and the engineering of Rock And Soil.
4, injecting cement paste of the present invention is to being wrapped in anchor rod body wherein and the expansion tooth bowl of bottom thereof, and expansible stopper plays waterproof, anticorrosion, rust inhibition, thereby improved the durability of ground anchorage.
5, simple in structure, with low cost, the easy construction of the present invention.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
Fig. 1 is structural representation of the present invention.
Fig. 2 is the structural representation of bottom of the present invention.
Fig. 3 is anchor rod body shaft section schematic diagram of the present invention.
Fig. 4 is expansible stopper schematic diagram of the present invention.
Fig. 5 is expansible stopper shaft section schematic diagram of the present invention.
Fig. 6 is expansion tooth bowl top view of the present invention.
Fig. 7 is expansion tooth bowl shaft section schematic diagram of the present invention.
In figure: 1-Rock And Soil, 2-injecting cement paste 3-boring, 4-anchor rod body 5-pad platform 6-backing plate, 7-nut, 8-top, 9-expansible stopper, 10-expansion tooth bowl, 11-tooth, 12-hole wall, 13-annular platform, 14-injected hole, 15-screw thread, 16-expansible stopper centre bore.
The specific embodiment
As shown in Fig. 1 ~ 7, smoothly prevent the prestressed anchor extracted from anchor hole, it comprises that bottom is provided with the expansible stopper 9 of expansible stopper centre bore 16 and pad platform 5, backing plate 6, nut 7 with anchor rod body 4, the center of expansion tooth bowl 10.On pad platform 5 and backing plate 6, be equipped with bolthole; The top 8 of anchor rod body 4 connects together with nut 7 through the bolthole of expansible stopper centre bore 16, pad platform 5 and backing plate 6 successively; Expansible stopper 9 is placed in expansion tooth bowl 10.
Wherein: expansion tooth bowl 10 is little bowl-shape in mouthful large end, and its opening upwards, blurts out, and is circumferentially being spacedly distributed and the tooth 11 being connected at the bottom of bowl; The inner surface of tooth 11 is distributed with multiple annular platforms 13.
The top 8 of anchor rod body 4 is provided with screw thread 15.
On backing plate 6, have an injected hole 14.
embodiment 1(1) by designing requirement, Rock And Soil 1 Drilling is holed to 3, and in the construction of 3 mouthfuls of place's pad platforms 5 of holing; By anchor rod body 4 tops through expansible stopper 9 with expansible stopper centre bore 16, until by expansible stopper 9 be pushed into anchor rod body 4 bottoms with expansion tooth bowl 10 in, make the frustum cone side of expansible stopper 9 and the inner surface of expansion tooth bowl 10 teeth 11 identical; By expansible stopper 9 in company with anchor rod body 4 be placed in together boring 3 in, until by anchor rod body 4 bottoms with expansion tooth bowl 10 be pushed into boring 3 ends; (4) adopt the pipe longer than anchor rod body 4, be enclosed within on anchor rod body 4, applied thrust is in pipe, and the expansible stopper 9 that orders about truncated cone-shaped by pipe is to 10 ends of expansion tooth bowl close time, the tooth 11 of extrusion expansion tooth bowl 10 opens to surrounding, and is pressed in boring 3 hole wall 12 Rock And Soils 1;
stop pipe applied thrust and taken out, the inner surface annular platform 13 that expansible stopper 9 is inflated tooth bowl 10 teeth 11 blocks, and still keeps the tooth 11 of expansion tooth bowl 10 to open embolism among boring 3 hole wall 12 Rock And Soils 1 to surrounding;
add upper padding plate 6 on anchor pole top 8, even if also anchor pole top 8 is through the bolthole at backing plate 6 centers, and fastening nut 7, anchor rod body 4 applies prestressing force to side slope Rock And Soil 1;
by injected hole on backing plate 14 to the 3 interior filling and injecting slurry bodies 1 of holing, injecting cement paste 2 after fixed by with the expansible stopper 9 of anchor rod body 4 and bottom thereof, and expansion tooth bowl 10 is consolidated in one tightly, in the time that slope ground body 1 is out of shape, not only be subject to the prestressing force that anchor rod body 4 applies, be subject to because slope ground body 1 is out of shape and the anchored force of passive generation simultaneously.
embodiment 2(1) by designing requirement, Rock And Soil 1 Drilling is holed to 3, and in the construction of 3 mouthfuls of place's pad platforms 5 of holing; By anchor rod body 4 tops through expansible stopper 9 with expansible stopper centre bore 16, until by expansible stopper 9 be pushed into anchor rod body 4 bottoms with expansion tooth bowl 10 in, make the thin frustum cone side of expansible stopper 9 and the inner surface of expansion tooth bowl 10 teeth 11 identical; By expansible stopper 9 in company with anchor rod body 4 be placed in together boring 3 in, until by anchor rod body 4 bottoms with expansion tooth bowl 10 be pushed into boring 3 ends; (4) adopt the pipe shorter than anchor rod body 4, be enclosed within on anchor rod body 4, then add upper padding plate 6 on anchor pole top 8, even if also anchor pole top 8, through backing plate 6 holes, makes backing plate 6 be pressed in the upper end of pipe, the nut 7 of screwing on anchor pole top 8, with tightening of nut 7, backing plate 6 strengthens the pressure of pipe, and the expansible stopper 9 that orders about truncated cone-shaped is to 10 ends of expansion tooth bowl close time, the tooth 11 of extrusion expansion tooth bowl 10 opens to surrounding, and is pressed in boring 3 hole wall 12 Rock And Soils;
back out nut 7, unload lower bolster 6, thereby stop pipe applied thrust, and by its taking-up, the inner surface annular platform 13 that expansible stopper 9 is inflated tooth bowl 10 teeth 11 blocks, and still keeps expansion tooth bowl 10 teeth 11 to open embolism among boring 3 hole wall 12 Rock And Soils to surrounding;
again add upper padding plate 6 on anchor pole top 8, even if also anchor pole top 8 is through the bolthole at backing plate 6 centers, and fastening nut 7, anchor rod body 4 applies prestressing force to side slope Rock And Soil 1;
by injected hole on backing plate 14 to the 3 interior filling and injecting slurry bodies 1 of holing, injecting cement paste 2 after fixed by with the expansible stopper 9 of anchor rod body 4 and bottom thereof, and expansion tooth bowl 10 is consolidated in one tightly, in the time that slope ground body 1 is out of shape, not only be subject to the prestressing force that anchor rod body 4 applies, be subject to because slope ground body 1 is out of shape and the anchored force of passive generation simultaneously.
Claims (5)
1. smoothly prevent the prestressed anchor of extracting from anchor hole, it is characterized in that: it comprises that bottom is with the anchor rod body (4) of expansion tooth bowl (10), expansible stopper (9) that center is provided with expansible stopper centre bore (16) and pad platform (5), backing plate (6), nut (7); On described pad platform (5) and described backing plate (6), be equipped with bolthole; The top (8) of described anchor rod body (4) connects together with described nut (7) through the bolthole of described expansible stopper centre bore (16), described pad platform (5) and described backing plate (6) successively; Described expansible stopper (9) is placed in described expansion tooth bowl (10).
2. the prestressed anchor extracted from anchor hole of smoothly preventing as claimed in claim 1, is characterized in that: described expansion tooth bowl (10) is little bowl-shape in mouthful large end, and its opening upwards, blurts out, and is circumferentially being spacedly distributed and the tooth being connected at the bottom of bowl (11); The inner surface of described tooth (11) is distributed with multiple annular platforms (13).
3. the prestressed anchor extracted from anchor hole of smoothly preventing as claimed in claim 1, is characterized in that: described expansible stopper (9) is truncated cone-shaped, and the inner surface of its side and described tooth (11) coincide.
4. the prestressed anchor extracted from anchor hole of smoothly preventing as claimed in claim 1, is characterized in that: the top (8) of described anchor rod body (4) is provided with screw thread (15).
5. the prestressed anchor extracted from anchor hole of smoothly preventing as claimed in claim 1, is characterized in that: on described backing plate (6), have an injected hole (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210412800.5A CN103774652B (en) | 2012-10-26 | 2012-10-26 | Smoothly prevent the prestressed anchor extracted from anchor hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210412800.5A CN103774652B (en) | 2012-10-26 | 2012-10-26 | Smoothly prevent the prestressed anchor extracted from anchor hole |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103774652A true CN103774652A (en) | 2014-05-07 |
| CN103774652B CN103774652B (en) | 2015-10-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210412800.5A Expired - Fee Related CN103774652B (en) | 2012-10-26 | 2012-10-26 | Smoothly prevent the prestressed anchor extracted from anchor hole |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114439004A (en) * | 2022-04-07 | 2022-05-06 | 成都理工大学 | Separation device and method capable of recycling anchor rod |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1737270A (en) * | 2005-07-08 | 2006-02-22 | 吴德兴 | Shell expand anchorage head and anchor bar |
| US7179020B2 (en) * | 2003-12-08 | 2007-02-20 | Robertson Jr Roy Lee | Mine roof bolt anchoring system and method |
| CN201802429U (en) * | 2010-07-22 | 2011-04-20 | 成都四海岩土工程有限公司 | Expanding shell type center hole exhaust and grouting prestressed anchor rod |
| US20120213607A1 (en) * | 2010-08-25 | 2012-08-23 | Amir Peled | Anchoring Apparatus and Method of Use |
| CN202936780U (en) * | 2012-10-26 | 2013-05-15 | 兰州大学 | Sequential port prestress anchor rod prevented from being drawn out from anchor eye |
-
2012
- 2012-10-26 CN CN201210412800.5A patent/CN103774652B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7179020B2 (en) * | 2003-12-08 | 2007-02-20 | Robertson Jr Roy Lee | Mine roof bolt anchoring system and method |
| CN1737270A (en) * | 2005-07-08 | 2006-02-22 | 吴德兴 | Shell expand anchorage head and anchor bar |
| CN201802429U (en) * | 2010-07-22 | 2011-04-20 | 成都四海岩土工程有限公司 | Expanding shell type center hole exhaust and grouting prestressed anchor rod |
| US20120213607A1 (en) * | 2010-08-25 | 2012-08-23 | Amir Peled | Anchoring Apparatus and Method of Use |
| CN202936780U (en) * | 2012-10-26 | 2013-05-15 | 兰州大学 | Sequential port prestress anchor rod prevented from being drawn out from anchor eye |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114439004A (en) * | 2022-04-07 | 2022-05-06 | 成都理工大学 | Separation device and method capable of recycling anchor rod |
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| CN103774652B (en) | 2015-10-28 |
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Granted publication date: 20151028 Termination date: 20201026 |