CN202936780U - Sequential port prestress anchor rod prevented from being drawn out from anchor eye - Google Patents
Sequential port prestress anchor rod prevented from being drawn out from anchor eye Download PDFInfo
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- CN202936780U CN202936780U CN 201220551255 CN201220551255U CN202936780U CN 202936780 U CN202936780 U CN 202936780U CN 201220551255 CN201220551255 CN 201220551255 CN 201220551255 U CN201220551255 U CN 201220551255U CN 202936780 U CN202936780 U CN 202936780U
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- anchor
- anchor rod
- bowl
- rod body
- expansion
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Abstract
The utility model relates to a sequential port prestress anchor rod capable of preventing drawing out from an anchor eye. The sequential port prestress anchor rod comprises an anchor rod body with an expansion tooth bowl at the bottom end, an expansion plug with an expansion plug center hole in the center, as well as a bearing stand, a bearing plate and a nut, wherein anchor rod holes are formed on both the bearing stand and the bearing plate, the top end of the anchor rod body sequentially penetrates through the expansion plug center hole, the bearing stand and the anchor rod hole of the bearing plate to be connected together with the nut; and the expansion plug is positioned inside the expansion tooth bowl. The sequential port prestress anchor rod provided by the utility model has a simple structure, is low in cost, is convenient to construct, constructs a novel pulling force-pressing force-plug composite prestress anchoring system, can prevent the anchor rod from being drawn out from the anchor eye with grouting, and the stability, the engineering safety and the anchoring durableness of a geotechnical body can be enhanced.
Description
Technical field
The utility model is related to Anchorage Technology, more particularly to the prestressed anchor for preventing from extracting from anchor hole of blurting out.
Background technology
At present, ground anchorage is by embedded anchor pole in the earth formation, stratum is tightly locked together, rely on the interaction of anchor pole-injecting cement paste-hole wall ground muscle power, transfer and improve the self-strength and self-stable ability of Rock And Soil, to improve stress state, it is ensured that the stabilization of outside Rock And Soil, so that it is guaranteed that the technology of engineering safety.The engineer applied of Anchorage Technology started from for 19 end of the centurys, 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 extended to, it is used as a kind of ideal support form, extensive use is obtained in slope project, underground engineering, deep-foundation pit engineering, key effect is played in national economy major project.
Ground anchorage is not only influenceed by formation lithology, Rock-soil Mass Structure, geological structure, hydrogeology, topography and geomorphology etc., it is also possible to acted on by violent earthquake, and they constitute a threat to the safety of ground anchorage.
Between the construction and run phrase of ground anchorage, it is most basic, most typically, most common ground anchorage failure mode that anchor pole is extracted from anchor hole together with injecting cement paste, it will cause ground anchorage to fail, and bring hidden danger to engineering safety, so as to limit the anchor force that anchor pole can be provided.Thus, when Rock And Soil needs the anchor force of offer larger, common bolt anchoring can not meet the requirement of engineering, govern Anchorage Technology application and develop, how the loading transfer mechanism of ground anchorage is improved, the drawbacks of overcoming common anchoring, as the fundamental way for improving anchor-holding force of anchor bolt, improvement anchoring effect.
In addition, injecting cement paste can hardly provide anchor force initial stage in anchoring, thus do not adapt to need the requirement of supporting immediately after soft rock-soil body is excavated.Although existing pipe-seam type anchor rod has overcome to disadvantages mentioned above, anchor force can be provided after rockbolt installation immediately, is conducive to the deformation of control Rock And Soil in time, the anchor force that anchor pole can be provided is little；Simultaneously as soft rock-soil is known from experience squeezes into tube chamber from the pipe seam of pipe-seam type anchor rod, the reduction of anchor force is caused.
The content of the invention
Technical problem to be solved in the utility model is to provide a kind of prestressed anchor for preventing from extracting from anchor hole of blurting out that can be improved and provide anchor force immediately, save material, easy construction.
To solve the above problems, prestressed anchor described in the utility model that prevent from extracting from anchor hole of blurting out, it is characterised in that：It includes the expansible stopper and pad, backing plate, nut that anchor rod body of the bottom with expansion tooth bowl, center are provided with expansible stopper centre bore；The pad on the backing plate with being equipped with bolthole；The bolthole that the top of the anchor rod body sequentially passes through the expansible stopper centre bore, the pad and the backing plate is connected together with the nut；The expansible stopper is placed in the expansion tooth bowl.
The expansion tooth bowl blurts out, be circumferentially spacedly distributed the tooth being connected with bowl bottom in small bowl-shape, its opening upwards in the big bottom of mouth；Multiple annular platforms are distributed with the inner surface of the tooth.
The expansible stopper is in truncated cone-shaped, and its side and the inner surface of the tooth coincide.
The top of the anchor rod body is provided with screw thread.
An injected hole is provided with the backing plate.
The utility model has advantages below compared with prior art：
1, the utility model first carries on anchor rod body top through center the expansible stopper of through hole, until expansible stopper is pushed into the expansion tooth bowl of anchor rod body bottom institute band, the inner surface of the frustum cone side and expansion tooth bowl tooth of expansible stopper is set to coincide, then it is placed in company with anchor rod body in drilling, until the expansion tooth bowl of anchor rod body bottom institute band is pushed into the bottom that drills, by the pipe being enclosed within anchor rod body drive the expansible stopper of truncated cone-shaped to expansion tooth bowl bottom it is close while, the teeth directional surrounding of extrusion expansion tooth bowl is opened, and be pressed into borehole wall Rock And Soil, when stopping applying thrust to pipe, the inner surface annular platform that the expansible stopper of anchor rod body bottom is inflated tooth bowl tooth is blocked, remain in that expansion tooth bowl teeth directional surrounding opens embolism among borehole wall Rock And Soil.Take out after pipe, backing plate is added on anchor pole top, even if also anchor pole top passes through the bolthole at backing plate center, and tightens nut, anchor rod body is that side slope Rock And Soil applies prestressing force.
2nd, the utility model by injected hole on backing plate to filling and injecting slurry body in drilling, injecting cement paste after consolidation is by the expansion tooth bowl with anchor rod body and its bottom, and expansible stopper is tightly consolidated in one, when slope ground body is deformed, anchor force is passively produced by anchor rod body side slope Rock And Soil.
3rd, the utility model significantly optimizes and improved the loading transfer mechanism of ground anchorage, construct pulling force-pressure-embolism NEW TYPE OF COMPOSITE prestress anchoraging system, it can effectively prevent that anchor pole from extracting together with injecting cement paste from anchor hole, i.e. anchor pole is destroyed together with injecting cement paste along with the contact interface of Rock And Soil, significantly improve rock-reinforcing effect, the self-stable ability of Rock And Soil is preferably transferred, so as to improve the stability of Rock And Soil and the security of engineering.
4th, injecting cement paste of the present utility model is to being wrapped in the expansion tooth bowl of anchor rod body therein and its bottom, and expansible stopper plays waterproof, anticorrosion, anti-rust action, so as to improve the durability of ground anchorage.
5th, the utility model is simple in construction, with low cost, easy construction.
Brief description of the drawings
Embodiment of the present utility model is described in further detail below in conjunction with the accompanying drawings.
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structural representation of the utility model bottom.
Fig. 3 is anchor rod body shaft section schematic diagram of the present utility model.
Fig. 4 is expansible stopper schematic diagram of the present utility model.
Fig. 5 is expansible stopper shaft section schematic diagram of the present utility model.
Fig. 6 is expansion tooth bowl top view of the present utility model.
Fig. 7 is expansion tooth bowl shaft section schematic diagram of the present utility model.
In figure：1-Rock And Soil, 2-injecting cement paste 3-8-top of drilling 4-anchor rod body, 5-pad, 6-backing plate, 7-nut, 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.
Embodiment
As shown in Fig. 1 ~ 7, the prestressed anchor extracted from anchor hole is smoothly prevented, it includes the expansible stopper 9 and pad 5, backing plate 6, nut 7 that anchor rod body 4 of the bottom with expansion tooth bowl 10, center are provided with expansible stopper centre bore 16.Pad 5 on backing plate 6 with being equipped with bolthole；The bolthole that the top 8 of anchor rod body 4 sequentially passes through expansible stopper centre bore 16, pad 5 and backing plate 6 is connected together with nut 7；Expansible stopper 9 is placed in expansion tooth bowl 10.
Wherein：Tooth bowl 10 is expanded in small bowl-shape, its opening upwards in the big bottom of mouth, that is, is blurted out, be circumferentially spacedly distributed the tooth 11 being connected with bowl bottom；Multiple annular platforms 13 are distributed with the inner surface of tooth 11.
The top 8 of anchor rod body 4 is provided with screw thread 15.
An injected hole 14 is provided with backing plate 6.
Embodiment 1By design requirement to the Drilling of Rock And Soil 1 drilling 3, and drilling 3 mouthfuls place progress pad 5 construction；(2) the top of anchor rod body 4 is passed through into the expansible stopper 9 with expansible stopper centre bore 16, until expansible stopper 9 is pushed into the expansion tooth bowl 10 of the bottom institute band of anchor rod body 4, the inner surface of the frustum cone side and expansion tooth 10 teeth 11 of bowl of expansible stopper 9 is coincide；(3) expansible stopper 9 is placed in drilling 3 together in company with anchor rod body 4, until the expansion tooth bowl 10 of the bottom institute band of anchor rod body 4 is pushed into 3 bottoms that drill；(4) the pipe longer than anchor rod body 4 is used, be sleeved on anchor rod body 4, apply thrust in pipe, by pipe drive the expansible stopper 9 of truncated cone-shaped to 10 bottoms of expansion tooth bowl it is close while, the tooth 11 of extrusion expansion tooth bowl 10 opens to surrounding, and is pressed into the drilling Rock And Soil 1 of 3 hole wall 12； 
Stop applying pipe thrust and be drawn off, the inner surface annular platform 13 that expansible stopper 9 is inflated tooth 10 teeth 11 of bowl is blocked, remain in that the tooth 11 of expansion tooth bowl 10 opens embolism among the drilling Rock And Soil 1 of 3 hole wall 12 to surrounding；
Backing plate 6 is added on anchor pole top 8, even if also anchor pole top 8 passes through the bolthole at the center of backing plate 6, and tightens nut 7, anchor rod body 4 is that side slope Rock And Soil 1 applies prestressing force；
Pass through filling and injecting slurry body 1 in 14 pairs of drillings 3 of injected hole on backing plate, injecting cement paste 2 after consolidation by with anchor rod body 4 and its expansible stopper of bottom 9, and expansion tooth bowl 10 is tightly consolidated in one, when slope ground body 1 is deformed, the prestressing force not only applied by anchor rod body 4, while being subjected to the anchor force that slope ground body 1 is deformed and passively produced.
Embodiment 2By design requirement to the Drilling of Rock And Soil 1 drilling 3, and drilling 3 mouthfuls place progress pad 5 construction；(2) the top of anchor rod body 4 is passed through into the expansible stopper 9 with expansible stopper centre bore 16, until expansible stopper 9 is pushed into the expansion tooth bowl 10 of the bottom institute band of anchor rod body 4, the inner surface of the thin frustum cone side and expansion tooth 10 teeth 11 of bowl of expansible stopper 9 is coincide；(3) expansible stopper 9 is placed in drilling 3 together in company with anchor rod body 4, until the expansion tooth bowl 10 of the bottom institute band of anchor rod body 4 is pushed into 3 bottoms that drill；(4) the pipe shorter than anchor rod body 4 is used, it is sleeved on anchor rod body 4, then backing plate 6 is added on anchor pole top 8, even if also anchor pole top 8 passes through the hole of backing plate 6, backing plate 6 is pressed in the upper end of pipe, nut 7 is screwed on anchor pole top 8, with tightening for nut 7, backing plate 6 is increased to the pressure of pipe, drive the expansible stopper 9 of truncated cone-shaped to 10 bottoms of expansion tooth bowl it is close while, the tooth 11 of extrusion expansion tooth bowl 10 opens to surrounding, and is pressed into the drilling Rock And Soil of 3 hole wall 12；
Nut 7 is backed out, lower bolster 6 is unloaded, so as to stop applying thrust to pipe, and is drawn off, the inner surface annular platform 13 that expansible stopper 9 is inflated tooth 10 teeth 11 of bowl is blocked, remains in that expansion tooth 10 teeth 11 of bowl open embolism among the drilling Rock And Soil of 3 hole wall 12 to surrounding；
Backing plate 6 is added again on anchor pole top 8, even if also anchor pole top 8 passes through the bolthole at the center of backing plate 6, and tightens nut 7, anchor rod body 4 is that side slope Rock And Soil 1 applies prestressing force；Pass through filling and injecting slurry body 1 in 14 pairs of drillings 3 of injected hole on backing plate, injecting cement paste 2 after consolidation by with anchor rod body 4 and its expansible stopper of bottom 9, and expansion tooth bowl 10 is tightly consolidated in one, when slope ground body 1 is deformed, the prestressing force not only applied by anchor rod body 4, while being subjected to the anchor force that slope ground body 1 is deformed and passively produced.
Claims (5)
1. the prestressed anchor for preventing from extracting from anchor hole of blurting out, it is characterised in that：It includes bottom with expansion tooth bowl（10）Anchor rod body（4）, center be provided with expansible stopper centre bore（16）Expansible stopper（9）And pad（5）, backing plate（6）, nut（7）；The pad（5）With the backing plate（6）On be equipped with bolthole；The anchor rod body（4）Top（8）Sequentially pass through the expansible stopper centre bore（16）, the pad（5）With the backing plate（6）Bolthole and the nut（7）Connect together；The expansible stopper（9）It is placed in the expansion tooth bowl（10）It is interior.
2. prestressed anchor as claimed in claim 1 that prevent from extracting from anchor hole of blurting out, it is characterised in that：The expansion tooth bowl（10）In small bowl-shape, its opening upwards in the big bottom of mouth, that is, blurt out, be circumferentially spacedly distributed the tooth being connected with bowl bottom（11）；The tooth（11）Inner surface multiple annular platforms are distributed with（13）.
3. prestressed anchor as claimed in claim 1 that prevent from extracting from anchor hole of blurting out, it is characterised in that：The expansible stopper（9）In truncated cone-shaped, its side and the tooth（11）Inner surface coincide.
4. prestressed anchor as claimed in claim 1 that prevent from extracting from anchor hole of blurting out, it is characterised in that：The anchor rod body（4）Top（8）It is provided with screw thread（15）.
5. prestressed anchor as claimed in claim 1 that prevent from extracting from anchor hole of blurting out, it is characterised in that：The backing plate（6）On be provided with an injected hole（14）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220551255 CN202936780U (en) | 2012-10-26 | 2012-10-26 | Sequential port prestress anchor rod prevented from being drawn out from anchor eye |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220551255 CN202936780U (en) | 2012-10-26 | 2012-10-26 | Sequential port prestress anchor rod prevented from being drawn out from anchor eye |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202936780U true CN202936780U (en) | 2013-05-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220551255 Expired - Fee Related CN202936780U (en) | 2012-10-26 | 2012-10-26 | Sequential port prestress anchor rod prevented from being drawn out from anchor eye |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202936780U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103774652A (en) * | 2012-10-26 | 2014-05-07 | 兰州大学 | Pre-stressed anchor rod capable of preventing from being pulled out from anchor eye along opening |
-
2012
- 2012-10-26 CN CN 201220551255 patent/CN202936780U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103774652A (en) * | 2012-10-26 | 2014-05-07 | 兰州大学 | Pre-stressed anchor rod capable of preventing from being pulled out from anchor eye along opening |
| CN103774652B (en) * | 2012-10-26 | 2015-10-28 | 兰州大学 | Smoothly prevent the prestressed anchor extracted from anchor hole |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130515 Termination date: 20151026 |
|
| EXPY | Termination of patent right or utility model |