CN103774648B - A kind of prestressed anchor preventing extracting from anchor hole - Google Patents

A kind of prestressed anchor preventing extracting from anchor hole Download PDF

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Publication number
CN103774648B
CN103774648B CN201210412808.1A CN201210412808A CN103774648B CN 103774648 B CN103774648 B CN 103774648B CN 201210412808 A CN201210412808 A CN 201210412808A CN 103774648 B CN103774648 B CN 103774648B
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CN
China
Prior art keywords
anchor
bowl
backing plate
anchor rod
pad
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Expired - Fee Related
Application number
CN201210412808.1A
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Chinese (zh)
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CN103774648A (en
Inventor
言志信
江平
曾明正
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Lanzhou University
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Lanzhou University
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Priority to CN201210412808.1A priority Critical patent/CN103774648B/en
Publication of CN103774648A publication Critical patent/CN103774648A/en
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Publication of CN103774648B publication Critical patent/CN103774648B/en
Expired - Fee Related legal-status Critical Current
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Abstract

The present invention relates to a kind of prestressed anchor preventing extracting from anchor hole, it comprises bottom with the anchor rod body of expansible stopper, expansion tooth bowl and pad, backing plate, nut.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 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

A kind of prestressed anchor preventing extracting from anchor hole
Technical field
The present invention relates to Anchorage Technology, particularly relate to a kind of prestressed anchor preventing extracting from anchor hole.
Background technology
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, ensure the stable of outside Rock And Soil to improve stress state, 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 the anchored force needing to provide is 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 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 preventing extracting from anchor hole of material, easy construction.
For solving the problem, a kind of prestressed anchor preventing extracting from anchor hole of the present invention, is characterized in that: it comprises bottom with the anchor rod body of expansible stopper, expansion tooth bowl and pad, backing plate, nut; 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 pad successively; Described expansible stopper is placed in described expansion tooth bowl.
Described expansible stopper is truncated cone-shaped.
The top of described anchor rod body is provided with screw thread.
Described expansion tooth bowl is little bowl-shape in the mouth large end, its opening upwards, and circumference is spacedly distributed and the tooth be connected at the bottom of bowl, and the inner surface of this tooth is distributed with multiple annular platform, and the side-anastomosis of the inner surface of described tooth and described expansible stopper.
Described backing plate has an injected hole.
The present invention compared with prior art has the following advantages:
1, the bowl-shape expansion tooth bowl little large for the mouth end is first placed in the boring end by the present invention, anchor rod body is placed in boring and pushes away the expansion tooth bowl of its bottom expansible stopper to the boring end, by applied thrust in being enclosed within the pipe on anchor rod body, make pipe order about the expansible stopper of anchor rod body bottom truncated cone-shaped close at the bottom of expansion tooth bowl while, the teeth directional surrounding of pushing 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 expansible stopper with anchor rod body and bottom thereof, and expansion tooth bowl is consolidated in one tightly, when slope ground body deformability, by anchor rod body, anchored force is applied to 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 with the contact interface of Rock And Soil together with injecting cement paste edge, 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 expansible stopper of the anchor rod body be wrapped in wherein and bottom thereof, and expansion tooth bowl plays waterproof, anticorrosion, rust inhibition, thus improves the durability of anchoring.
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 anchor rod body bottom of the present invention expansible stopper schematic diagram.
Fig. 5 is anchor rod body bottom of the present invention expansible stopper shaft section schematic diagram.
Fig. 6 is expansion tooth bowl schematic diagram 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.
Detailed description of the invention
As shown in Fig. 1 ~ 7, a kind of prestressed anchor preventing extracting from anchor hole, it comprises bottom with the anchor rod body 4 of expansible stopper 9, expansion tooth bowl 10 and pad 5, backing plate 6, nut 7.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 pad 5 successively; Expansible stopper 9 is placed in expansion tooth bowl 10.
Wherein: expansible stopper 9 is in truncated cone-shaped.
The top 8 of anchor rod body 4 is provided with screw thread 15.
Expansion tooth bowl 10 bowl-shape little in the mouth large end, its opening upwards, circumference is spacedly distributed and the tooth 11 be connected at the bottom of bowl, and the inner surface of this tooth 11 is distributed with multiple annular platform 13, and the side-anastomosis of the inner surface of tooth 11 and expansible stopper 9.
Backing plate 6 has an injected hole 14.
During use, (1) by designing requirement, 3 are holed to Rock And Soil 1 Drilling; (2) the construction of pad 5 is carried out at boring 3 mouthfuls of places; the bowl-shape expansion tooth bowl 10 little large for the mouth end is placed in boring 3, and the end of bowl-shape expansion tooth bowl 10, coincided with 3 ends of boring; (4) put anchor rod body 4 in boring 3, push away its bottom truncated cone-shaped expansible stopper 9 and match to the inner surface with boring 3 end bowl-shape expansion tooth bowl 10; pipe is enclosed within anchor rod body 4, applied thrust is in pipe, ordered about the expansible stopper 9 of anchor rod body 4 bottom truncated cone-shaped by pipe while expansion tooth bowl 10 end is close, the tooth 11 of extrusion expansion tooth bowl 10 opens to surrounding, and is pressed in the Rock And Soil 1 of boring 3 hole wall 12; stop pipe applied thrust and taken out, the expansible stopper 9 of anchor rod body 4 bottom is blocked by the inner surface annular platform 13 of tooth 11, still keeps tooth 11 to open embolism among the Rock And Soil 1 of hole wall 12 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 14 on backing plate 6 to filling and injecting slurry body 2 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, applies anchored force by anchor rod body 4 pairs of side slope Rock And Soils 1.

Claims (1)

1. prevent the prestressed anchor extracted from anchor hole, it is characterized in that: it comprises bottom with the anchor rod body (4) of expansible stopper (9), expansion tooth bowl (10) and pad (5), backing plate (6), nut (7); 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 pad (5) successively; Described expansible stopper (9) is placed in described expansion tooth bowl (10); Described expansible stopper (9) is in truncated cone-shaped; The top (8) of described anchor rod body (4) is provided with screw thread (15); Described expansion tooth bowl (10) is little bowl-shape in the large end in mouth, its opening upwards, circumference is spacedly distributed and the tooth be connected at the bottom of bowl (11), and the inner surface of this tooth (11) is distributed with multiple annular platform (13), and the side-anastomosis of the inner surface of described tooth (11) and described expansible stopper (9); Described backing plate (6) has an injected hole (14).
CN201210412808.1A 2012-10-26 2012-10-26 A kind of prestressed anchor preventing extracting from anchor hole Expired - Fee Related CN103774648B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201210412808.1A CN103774648B (en) 2012-10-26 2012-10-26 A kind of prestressed anchor preventing extracting from anchor hole

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Application Number Priority Date Filing Date Title
CN201210412808.1A CN103774648B (en) 2012-10-26 2012-10-26 A kind of prestressed anchor preventing extracting from anchor hole

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CN103774648A CN103774648A (en) 2014-05-07
CN103774648B true CN103774648B (en) 2015-12-02

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4974997A (en) * 1986-06-26 1990-12-04 Secure Anchoring & Foundation Equipment, Inc. Hydraulic setting tool for installing anchoring and foundation support apparatus
CN1737270A (en) * 2005-07-08 2006-02-22 吴德兴 Shell expand anchorage head and anchor bar
EP2423432A2 (en) * 2010-08-25 2012-02-29 Amir Peled Anchoring apparatus and method of use
CN202936791U (en) * 2012-10-26 2013-05-15 兰州大学 Pre-stressed anchor rod prevented from being pulled out of anchor eye

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4974997A (en) * 1986-06-26 1990-12-04 Secure Anchoring & Foundation Equipment, Inc. Hydraulic setting tool for installing anchoring and foundation support apparatus
CN1737270A (en) * 2005-07-08 2006-02-22 吴德兴 Shell expand anchorage head and anchor bar
EP2423432A2 (en) * 2010-08-25 2012-02-29 Amir Peled Anchoring apparatus and method of use
CN202936791U (en) * 2012-10-26 2013-05-15 兰州大学 Pre-stressed anchor rod prevented from being pulled out of anchor eye

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