CN103161485A - Pre-stressed anchoring conduit - Google Patents
Pre-stressed anchoring conduit Download PDFInfo
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- CN103161485A CN103161485A CN2011104210594A CN201110421059A CN103161485A CN 103161485 A CN103161485 A CN 103161485A CN 2011104210594 A CN2011104210594 A CN 2011104210594A CN 201110421059 A CN201110421059 A CN 201110421059A CN 103161485 A CN103161485 A CN 103161485A
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- anchor
- rod
- rod body
- conduit
- nut
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Abstract
The invention relates to a pre-stressed anchoring conduit based on improvement of an existing tube seam type anchor rod. The pre-stressed anchoring conduit comprises a rod body, an expanding core, a base plate and a nut, wherein the front half section of the rod body is a tubular rod body with a longitudinal joint, the rear half section of the rod body is a hollow anchor rod body in a full thread shape and made and rolled from a seamless steel tube, the tubular rod body and the hollow anchor rod body are welded into a whole, the expanding core is arranged at the front end of the conduit, and the nut and the base plate are arranged at the rear end of the conduit. According to the pre-stressed anchoring conduit, top anchoring can be achieved, anchoring force is obviously increased, and grouting to a rock stratum can be achieved through the hollow anchor rod body. Due to the fact that a pull ring is replaced with the nut at the tail end, stability is improved. The pre-stressed anchoring conduit is low in manufacturing cost, capable of greatly improving the anchoring effect of the tube seam type anchor rod, and quite high in economic benefit.
Description
Technical field
The present invention relates to a kind of geotechnical engineering supporting field of belonging to, particularly relate to a kind of novel pre-anchor conduit, is a kind of improvement to existing pipe-seam type anchor rod.
Background technology
Pipe-seam type anchor rod is known.Pipe-seam type anchor rod is the anchor pole of a kind of full length fastening, active reinforce adjoining rock, mainly is applicable to temporary lining or the permanent support of the well lanes engineering such as mine metallurgy, water power, railway.Its three-dimensional part is that employing high duty metal coiled sheet is pressed into the tubulose body of rod with longitudinal joint, and tail end is welded with draw ring, supports the use with supporting plate.When it is arranged on than the slightly little boring of caliber, can apply radial pressure and produce the frictional force that stops country rock to glide hole wall in length range immediately, add the supporting force of anchor rod pallet board supporting plate, thereby make country rock be in triaxial stress state, realization is due to the friction anchoring power that tube wall elasticity tension force extruding hole wall produces, and is self anchoring bolt that country rock is educated in initiatively back-up coat haircut.In the situations such as blasting vibration country rock anchor moves, the later stage anchored force is significantly increased, and when remarkable displacement occured country rock, anchor pole did not lose its supporting drag.
This known pipe-seam type anchor rod, its major defect has: (1) anchored force is lower, be mainly manifested in the top anchored force little, anchor pole and bore diameter aperture ratio do not mate, install not in placely etc., the draw ring of (2) tail end welding is because the welding quality problem, install and use procedure in easily come off, thereby cause the generation of contingency; (3) can't slip casting, the body of rod is perishable, can't adapt to the requirement of permanent support.
This shows, above-mentioned existing pipe-seam type anchor rod obviously still has inconvenience and defective, and demands urgently further being improved in structure and use.Therefore how to found a kind of pre-anchor conduit of new structure, also becoming the current industry utmost point needs improved target.
Summary of the invention
The object of the invention is to, overcome the defective that existing pipe-seam type anchor rod exists, and provide a kind of pre-anchor conduit of new structure, technical problem to be solved is to make its anchor rod body latter half be one section to help screw-shaped hollow bolt body by seamless steel pipe making and roll forming, connect into an integral body through welding and first half, thereby make it have the slip casting function.The anchor pole front end is equipped with expanded core, and inside is provided with pawl.After rockbolt installation, use the jacking of jacking instrument, the expanded core front end opens, thereby realizes the anchoring of anchor pole front end.But end of anchor rod mounting nuts.During installation, anchor pole is squeezed into ground inside, and after the front end anchoring, backing plate is close to crag, and nut tightening can prevent effectively that supporting plate is loosening and come off from the body of rod.
The object of the invention to solve the technical problems realizes by the following technical solutions.According to a kind of pre-anchor conduit that the present invention proposes, it is a kind of improvement to existing pipe-seam type anchor rod.Comprising: the body of rod, expanded core, backing plate, nut; Described this body of rod first half is the tubulose body of rod with longitudinal joint, described this body of rod latter half is one section and helps screw-shaped hollow bolt body by seamless steel pipe making and roll forming, through being welded to connect into an integral body, described anchor pole front end is provided with expanded core, and described anchor pole rear end is provided with nut and backing plate.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
Aforesaid a kind of pre-anchor conduit, wherein said anchor rod body latter half are one section and help screw-shaped hollow bolt body by seamless steel pipe making and roll forming;
Aforesaid a kind of pre-anchor conduit, wherein said anchor rod body latter half becomes as a whole by welding with first half;
Aforesaid a kind of pre-anchor conduit, the expanded core quantity of wherein said anchor pole front end can be one or more;
Aforesaid a kind of pre-anchor conduit, wherein said end of anchor rod is fixed by nut;
Aforesaid a kind of pre-anchor conduit, wherein said described end of anchor rod nut shape is hexagon or hemispherical.
The present invention compared with prior art has obvious advantage and beneficial effect.As known from the above, for achieving the above object, the invention provides a kind of pre-anchor conduit, is a kind of improvement to existing pipe-seam type anchor rod.Comprise: the body of rod, expanded core, backing plate, nut; Described this body of rod first half is the tubulose body of rod with longitudinal joint, described this body of rod latter half is one section and helps screw-shaped hollow bolt body by seamless steel pipe making and roll forming, through being welded to connect into an integral body, described anchor pole front end is provided with expanded core, and described anchor pole rear end is provided with nut and backing plate.The anchor rod body latter half is one section and helps screw-shaped hollow bolt body by seamless steel pipe making and roll forming, connects into an integral body through welding and first half, thereby make it have the slip casting function.The anchor pole front end is equipped with expanded core, and inside is provided with pawl.After rockbolt installation, use the jacking of jacking instrument, the expanded core front end opens, thereby realizes the anchoring of anchor pole front end.But end of anchor rod mounting nuts.During installation, anchor pole is squeezed into ground inside, and after the front end anchoring, backing plate is close to crag, and nut tightening can prevent effectively that supporting plate is loosening and come off from the body of rod.
By technique scheme, the pre-anchor conduit of the present invention has following advantages and beneficial effect at least:
1, the anchor rod body latter half is one section and is made by seamless steel pipe and screw-shaped hollow bolt body is helped in roll forming, connects into an integral body through welding and first half, thereby makes it have the slip casting function.
2, the anchor pole front end is equipped with expanded core, and inside is provided with pawl.After rockbolt installation, use the jacking of jacking instrument, the expanded core front end opens, thereby realizes the anchoring of anchor pole front end
But 3, end of anchor rod mounting nuts.During installation, anchor pole is squeezed into ground inside, and after the front end anchoring, backing plate is close to crag, and nut tightening can prevent effectively that supporting plate is loosening and come off from the body of rod.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of manual, and for above and other purpose of the present invention, feature and advantage can be become apparent, below especially exemplified by preferred embodiment, and the cooperation accompanying drawing, be described in detail as follows.
Description of drawings
Fig. 1 is the structural representation of pre-anchor conduit.
Fig. 2 is the expanded core generalized section.
The specific embodiment
Reach for further setting forth the present invention technological means and the effect that predetermined goal of the invention is taked, below in conjunction with accompanying drawing and preferred embodiment, pre-its specific embodiment of anchor conduit, structure, feature and effect thereof to foundation the present invention proposes are described in detail as follows.
Fig. 1 is the structural representation of pipe seam formula distortion anchor pole.The body of rod 3 first halfs are the tubulose bodies of rod with longitudinal joint, and latter half is one section to be made by seamless steel pipe and screw-shaped hollow bolt body is helped in roll forming, through being welded to connect into an integral body, thereby have realized the unification of anchoring and slip casting function;
Expanded core 4 inside are provided with pawl.After rockbolt installation, use the jacking of jacking instrument, expanded core 4 front ends open, thereby realize the anchoring of anchor pole front end; Backing plate 2 nuts 1 are close to backing plate on crag by screw thread.
Fig. 2 is the expanded core generalized section.Expanded core 4 front ends crack, and are provided with pawl 5, built-in wedge 6, and action principle is similar to setscrew, after rockbolt installation, use the jacking of jacking instrument, expanded core 4 front ends open, thereby realize the left and right of front end anchoring, also strut tube wall simultaneously, tube wall is contacted tightr with ground.
the above, it is only preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, although the present invention discloses as above with preferred embodiment, yet be not to limit the present invention, any those skilled in the art, within not breaking away from the technical solution of the present invention scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be not break away from the technical solution of the present invention content, any simple modification that foundation technical spirit of the present invention is done above embodiment, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (6)
1. a pre-anchor conduit, be a kind of improvement to existing pipe-seam type anchor rod.It is characterized in that, comprising: the body of rod, expanded core, backing plate, nut;
Described this body of rod first half is the tubulose body of rod with longitudinal joint, described this body of rod latter half is one section and helps screw-shaped hollow bolt body by seamless steel pipe making and roll forming, through being welded to connect into an integral body, described anchor pole front end is provided with expanded core, and described anchor pole rear end is provided with nut and backing plate.
2. a kind of pre-anchor conduit according to claim 1 is characterized in that: described anchor rod body latter half is one section to be made by seamless steel pipe and screw-shaped hollow bolt body is helped in roll forming;
3. a kind of pre-anchor conduit according to claim 1 is characterized in that: described anchor rod body latter half becomes as a whole by welding with first half;
4. a kind of pre-anchor conduit according to claim 1, it is characterized in that: the expanded core quantity of described anchor pole front end can be one or more;
5. a kind of pre-anchor conduit according to claim 1, it is characterized in that: end of anchor rod is fixed by nut;
6. a kind of pre-anchor conduit according to claim 1, it is characterized in that: described end of anchor rod nut shape is hexagon or hemispherical.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201110421059.4A CN103161485B (en) | 2011-12-16 | Pre-stressed anchoring conduit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201110421059.4A CN103161485B (en) | 2011-12-16 | Pre-stressed anchoring conduit |
Publications (2)
Publication Number | Publication Date |
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CN103161485A true CN103161485A (en) | 2013-06-19 |
CN103161485B CN103161485B (en) | 2016-12-14 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112796807A (en) * | 2021-02-09 | 2021-05-14 | 山东大学 | Radial single-end double-expansion grouting anchor rod for broken rock stratum tunnel |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0190460A1 (en) * | 1985-01-30 | 1986-08-13 | Dyckerhoff & Widmann Aktiengesellschaft | Anchoring device for the traction member of an anchor, especially a rock anchor |
CN2033446U (en) * | 1988-06-01 | 1989-03-01 | 东北工学院 | Pipe gap friction expanding joint of anchor arm |
CN201292856Y (en) * | 2008-12-08 | 2009-08-19 | 中国矿业大学(北京) | Tube seam type anchor rod |
CN201496085U (en) * | 2009-09-18 | 2010-06-02 | 武汉武大巨成加固实业有限公司 | Rear hole expansion self-locking anchor bar capable of being installed rapidly |
CN201924948U (en) * | 2011-02-21 | 2011-08-10 | 张子春 | Expansion type slotting anchor rod |
CN202500590U (en) * | 2011-12-16 | 2012-10-24 | 洛阳工岩科技有限公司 | Preliminary anchor pipe |
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0190460A1 (en) * | 1985-01-30 | 1986-08-13 | Dyckerhoff & Widmann Aktiengesellschaft | Anchoring device for the traction member of an anchor, especially a rock anchor |
CN2033446U (en) * | 1988-06-01 | 1989-03-01 | 东北工学院 | Pipe gap friction expanding joint of anchor arm |
CN201292856Y (en) * | 2008-12-08 | 2009-08-19 | 中国矿业大学(北京) | Tube seam type anchor rod |
CN201496085U (en) * | 2009-09-18 | 2010-06-02 | 武汉武大巨成加固实业有限公司 | Rear hole expansion self-locking anchor bar capable of being installed rapidly |
CN201924948U (en) * | 2011-02-21 | 2011-08-10 | 张子春 | Expansion type slotting anchor rod |
CN202500590U (en) * | 2011-12-16 | 2012-10-24 | 洛阳工岩科技有限公司 | Preliminary anchor pipe |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112796807A (en) * | 2021-02-09 | 2021-05-14 | 山东大学 | Radial single-end double-expansion grouting anchor rod for broken rock stratum tunnel |
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