CN103774652B - Smoothly prevent the prestressed anchor extracted from anchor hole - Google Patents

Smoothly prevent the prestressed anchor extracted from anchor hole Download PDF

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Publication number
CN103774652B
CN103774652B CN201210412800.5A CN201210412800A CN103774652B CN 103774652 B CN103774652 B CN 103774652B CN 201210412800 A CN201210412800 A CN 201210412800A CN 103774652 B CN103774652 B CN 103774652B
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CN
China
Prior art keywords
anchor
expansible stopper
rod body
backing plate
anchor rod
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Expired - Fee Related
Application number
CN201210412800.5A
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Chinese (zh)
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CN103774652A (en
Inventor
言志信
江平
邓骁
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Lanzhou University
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Lanzhou University
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Priority to CN201210412800.5A priority Critical patent/CN103774652B/en
Publication of CN103774652A publication Critical patent/CN103774652A/en
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Publication of CN103774652B publication Critical patent/CN103774652B/en
Expired - Fee Related legal-status Critical Current
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Abstract

The present invention relates to a kind of prestressed anchor smoothly preventing extracting from anchor hole, it comprises bottom is provided with expansible stopper centre bore expansible stopper and pad, backing plate, nut with the anchor rod body of expansion tooth bowl, center.Described pad and described backing plate are equipped with bolthole; The top of described anchor rod body connects together with described nut with the bolthole of described backing plate through described expansible stopper centre bore, described pad successively; Described expansible stopper is placed in described expansion tooth bowl.Structure of the present invention is simple, with low cost, easy construction, construct pulling force-pressure-embolism NEW TYPE OF COMPOSITE prestress anchoraging system, can prevent anchor pole from extracting from anchor hole together with injecting cement paste, improve the durability of the stability of Rock And Soil, the safety of engineering and anchoring.

Description

Smoothly prevent the prestressed anchor extracted from anchor hole
Technical field
The present invention relates to Anchorage Technology, particularly relate to the prestressed anchor smoothly preventing from extracting from anchor hole.
Background technology
At present, ground anchorage is the anchor pole by burying underground in the earth formation, stratum is locked together tightly, rely on the interaction of anchor pole-injecting cement paste-hole wall ground muscle power, transfer and improve self-strength and the self-stable ability of Rock And Soil, to improve stress state, ensure the stable of outside Rock And Soil, thus guarantee the technology of engineering safety.The engineer applied of Anchorage Technology started from for 19 end of the centurys, along with the development of its theory and technology, now the departments such as mine, water conservancy, water power, highway, railway, municipal administration, urban construction, geology, military project are extended to, as a kind of ideal support form, in slope project, underground construction, deep-foundation pit engineering, obtain extensive use, in national economy major project, 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., and also may be subject to the effect of violent earthquake, they all constitute a threat to the safety of ground anchorage.
Between the construction and run phrase of ground anchorage, anchor pole together with injecting cement paste extract from anchor hole 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.Thus, when Rock And Soil needs the anchored force that provides larger, common bolt anchoring can not meet the requirement of engineering, govern Anchorage Technology application and development, how to improve the loading transfer mechanism of ground anchorage, overcome the drawback of common anchoring, become the fundamental way improving anchor-holding force of anchor bolt, improve anchoring effect.
In addition, injecting cement paste almost can not provide anchored force at the anchoring initial stage, thus can not adapt to the requirement of needs supporting immediately after weak rocks soil excavation.Although existing pipe-seam type anchor rod overcomes to some extent to above-mentioned shortcoming, can provide anchored force immediately after rockbolt installation, be conducive to the distortion controlling Rock And Soil in time, the anchored force that anchor pole can provide is little; Meanwhile, know from experience due to soft rock-soil and clamp-on 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 one and can improves and provide anchored force immediately, saves the prestressed anchor smoothly preventing extracting from anchor hole of material, easy construction.
For solving the problem, the prestressed anchor smoothly preventing extracting from anchor hole of the present invention, is characterized in that: it comprises bottom is provided with expansible stopper centre bore expansible stopper and pad, backing plate, nut with the anchor rod body of expansion tooth bowl, center; Described pad and described backing plate are equipped with bolthole; The top of described anchor rod body connects together with described nut with the bolthole of described backing plate through described expansible stopper centre bore, described pad successively; Described expansible stopper is placed in described expansion tooth bowl.
Described expansion tooth bowl is little bowl-shape in the mouth large end, its opening upwards, namely blurts out, and circumference is spacedly distributed and the tooth be connected at the bottom of bowl; The inner surface of described tooth is distributed with multiple annular platform.
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.
Described backing plate has an injected hole.
The present invention compared with prior art has the following advantages:
1, the expansible stopper of center with through hole is first passed in anchor rod body top by the present invention, until expansible stopper is 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, order about by the pipe be enclosed within anchor rod body the expansible stopper of truncated cone-shaped close at the bottom of expansion tooth bowl while, the teeth directional surrounding of extrusion expansion tooth bowl is opened, and be pressed in borehole wall Rock And Soil, when 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 expansion tooth bowl teeth directional surrounding is kept to open embolism among borehole wall Rock And Soil.After taking out 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 is namely to side slope Rock And Soil Shi Hanzhang.
2, the present invention by injected hole on backing plate to boring in filling and injecting slurry body, injecting cement paste after consolidation is by the expansion tooth bowl with anchor rod body and bottom thereof, and expansible stopper is consolidated in one tightly, when 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 significantly and improves the loading transfer mechanism of ground anchorage, construct pulling force-pressure-embolism NEW TYPE OF COMPOSITE prestress anchoraging system, can effectively prevent anchor pole from extracting from anchor hole together with injecting cement paste, namely anchor pole destroys along the contact interface with Rock And Soil together with injecting cement paste, significantly improve rock-reinforcing effect, transfer the self-stable ability of Rock And Soil better, thus improve the stability of Rock And Soil and the safety of engineering.
4, injecting cement paste of the present invention is to the expansion tooth bowl of the anchor rod body be wrapped in wherein and bottom thereof, and expansible stopper plays waterproof, anticorrosion, rust inhibition, thus improves the durability of ground anchorage.
5, simple, with low cost, the easy construction of structure 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, 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.
Detailed description of the invention
As shown in Fig. 1 ~ 7, smoothly prevent the prestressed anchor extracted from anchor hole, it comprises bottom is provided with expansible stopper centre bore 16 expansible stopper 9 and pad 5, backing plate 6, nut 7 with the anchor rod body 4 of expansion tooth bowl 10, center.Pad 5 and backing plate 6 are equipped with bolthole; The top 8 of anchor rod body 4 connects together with nut 7 with the bolthole of backing plate 6 through expansible stopper centre bore 16, pad 5 successively; Expansible stopper 9 is placed in expansion tooth bowl 10.
Wherein: bowl-shape little in the mouth large end of expansion tooth bowl 10, its opening upwards, namely blurts out, and circumference is spacedly distributed and the tooth 11 be connected at the bottom of bowl; The inner surface of tooth 11 is distributed with multiple annular platform 13.
Expansible stopper 9 is in truncated cone-shaped, and the inner surface of its side and tooth 11 coincide.
The top 8 of anchor rod body 4 is provided with screw thread 15.
Backing plate 6 has an injected hole 14.
embodiment 1(1) by designing requirement, 3 are holed to Rock And Soil 1 Drilling, and carry out the construction of pad 5 at boring 3 mouthfuls of places; (2) by the expansible stopper 9 of anchor rod body 4 top through band expansible stopper centre bore 16, until expansible stopper 9 is pushed into anchor rod body 4 bottom with expansion tooth bowl 10 in, make the frustum cone side of expansible stopper 9 identical with the inner surface of expansion tooth bowl 10 tooth 11; (3) expansible stopper 9 is placed in boring 3 together in company with anchor rod body 4, until by anchor rod body 4 bottom with expansion tooth bowl 10 be pushed into boring 3 end; (4) adopt the pipe longer than anchor rod body 4, be enclosed within anchor rod body 4, applied thrust, in pipe, orders about the expansible stopper 9 of truncated cone-shaped while expansion tooth bowl 10 end is close by pipe, the tooth 11 of extrusion expansion tooth bowl 10 opens to surrounding, and is pressed in boring 3 hole wall 12 Rock And Soil 1; stop pipe applied thrust and taken out, the inner surface annular platform 13 that expansible stopper 9 is inflated tooth bowl 10 tooth 11 blocks, and still keeps the tooth 11 of expansion tooth bowl 10 to open embolism among boring 3 hole wall 12 Rock And Soil 1 to surrounding; upper padding plate 6 is added on anchor pole top 8, even if also anchor pole top 8 is through the bolthole at backing plate 6 center, and fastening nut 7, anchor rod body 4 is namely to side slope Rock And Soil 1 Shi Hanzhang; by injected hole on backing plate 14 to filling and injecting slurry body 1 in boring 3, injecting cement paste 2 after consolidation is by the expansible stopper 9 with anchor rod body 4 and bottom thereof, and expansion tooth bowl 10 is consolidated in one tightly, when 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 the anchored force of passive generation because slope ground body 1 is out of shape simultaneously.
embodiment 2(1) by designing requirement, 3 are holed to Rock And Soil 1 Drilling, and carry out the construction of pad 5 at boring 3 mouthfuls of places; (2) by the expansible stopper 9 of anchor rod body 4 top through band expansible stopper centre bore 16, until expansible stopper 9 is pushed into anchor rod body 4 bottom with expansion tooth bowl 10 in, make the thin frustum cone side of expansible stopper 9 identical with the inner surface of expansion tooth bowl 10 tooth 11; (3) expansible stopper 9 is placed in boring 3 together in company with anchor rod body 4, until by anchor rod body 4 bottom with expansion tooth bowl 10 be pushed into boring 3 end; (4) adopt the pipe shorter than anchor rod body 4, be enclosed within anchor rod body 4, then upper padding plate 6 is added on anchor pole top 8, even if also anchor pole top 8, through backing plate 6 hole, makes backing plate 6 be pressed in the upper end of pipe, to screw on anchor pole top 8 nut 7, with tightening of nut 7, the pressure of backing plate 6 pairs of pipes strengthens, and orders about the expansible stopper 9 of truncated cone-shaped while expansion tooth bowl 10 end is close, the tooth 11 of extrusion expansion tooth bowl 10 opens to surrounding, and is pressed in boring 3 hole wall 12 Rock And Soil; back out nut 7, unload lower bolster 6, thus stop pipe applied thrust, and taken out, the inner surface annular platform 13 that expansible stopper 9 is inflated tooth bowl 10 tooth 11 blocks, and still keeps expansion tooth bowl 10 tooth 11 to open embolism among boring 3 hole wall 12 Rock And Soil to surrounding; upper padding plate 6 is again added on anchor pole top 8, even if also anchor pole top 8 is through the bolthole at backing plate 6 center, and fastening nut 7, anchor rod body 4 is namely to side slope Rock And Soil 1 Shi Hanzhang; by injected hole on backing plate 14 to filling and injecting slurry body 1 in boring 3, injecting cement paste 2 after consolidation is by the expansible stopper 9 with anchor rod body 4 and bottom thereof, and expansion tooth bowl 10 is consolidated in one tightly, when 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 the anchored force of passive generation because slope ground body 1 is out of shape simultaneously.

Claims (1)

1. smoothly prevent the prestressed anchor extracted from anchor hole, it is characterized in that: it comprises bottom is provided with expansible stopper centre bore (16) expansible stopper (9) and pad (5), backing plate (6), nut (7) with the anchor rod body (4) of expansion tooth bowl (10), center; Described pad (5) and described backing plate (6) are equipped with bolthole; The top (8) of described anchor rod body (4) connects together with described nut (7) with the bolthole of described backing plate (6) through described expansible stopper centre bore (16), described pad (5) successively; Described expansible stopper (9) is placed in described expansion tooth bowl (10); Described expansion tooth bowl (10) is little bowl-shape in the large end in mouth, its opening upwards, namely blurts out, and circumference is spacedly distributed and the tooth be connected at the bottom of bowl (11); The inner surface of described tooth (11) is distributed with multiple annular platform (13); Described expansible stopper (9) is in truncated cone-shaped, and the inner surface of its side and described tooth (11) coincide; The top (8) of described anchor rod body (4) is provided with screw thread (15); Described backing plate (6) has an injected hole (14).
CN201210412800.5A 2012-10-26 2012-10-26 Smoothly prevent the prestressed anchor extracted from anchor hole Expired - Fee Related CN103774652B (en)

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* Cited by examiner, † Cited by third party
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 (4)

* Cited by examiner, † Cited by third party
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
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

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120213607A1 (en) * 2010-08-25 2012-08-23 Amir Peled Anchoring Apparatus and Method of Use

Patent Citations (4)

* Cited by examiner, † Cited by third party
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
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

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Granted publication date: 20151028

Termination date: 20201026