CN102691514B - Multistage sectional grouting-free self-expansion type anchoring rod - Google Patents

Multistage sectional grouting-free self-expansion type anchoring rod Download PDF

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Publication number
CN102691514B
CN102691514B CN201210185294.0A CN201210185294A CN102691514B CN 102691514 B CN102691514 B CN 102691514B CN 201210185294 A CN201210185294 A CN 201210185294A CN 102691514 B CN102691514 B CN 102691514B
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CN
China
Prior art keywords
anchoring rod
voussoir
anchoring
exempted
slip casting
Prior art date
Application number
CN201210185294.0A
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Chinese (zh)
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CN102691514A (en
Inventor
袁顺德
尚海松
詹显军
刘志强
冷希乔
舒波
潘强
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中铁西南科学研究院有限公司
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Priority to CN201210185294.0A priority Critical patent/CN102691514B/en
Publication of CN102691514A publication Critical patent/CN102691514A/en
Application granted granted Critical
Publication of CN102691514B publication Critical patent/CN102691514B/en

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Abstract

The invention discloses a multistage sectional grouting-free self-expansion type anchoring rod. The anchoring rod comprises an anchoring rod body, wherein a sleeve is sleeved on the anchoring rod body; a conical head is arranged at the upper end of the sleeve; 2 to 10 ring-shaped cone platforms are arranged on the anchoring rod body, and a group of four symmetrically-distributed wedge blocks are fixedly arranged on the anchoring rod body below each ring-shaped cone platform through hoops which are arranged in limiting seats of the wedge blocks; four symmetrically-distributed bosses are arranged below each group of the wedge blocks on the inner side of the sleeve, and springs for tightly pressing the wedge blocks upwards are arranged on the bosses; and strip-type square holes are formed in plastic sleeves at corresponding positions of the wedge blocks. The anchoring rod is uniquely designed in structure, is firmly and reliably mounted, is simple and quick in construction process, and can reach designed anchoring strength without anchoring rod grouting construction, so that the wall rock stability of a tunnel project is greatly improved, the construction period is shortened, the working efficiency is improved, the length of an anchoring section of the anchoring rod can be increased, the cross sectional area of the anchoring rod body is reduced, the steel consumption of the whole project is reduced, and the anchoring rod has good economic values.

Description

Multistage subsection is exempted from slip casting from expansion chuck anchoring rod

Technical field

The present invention relates to a kind of anchor pole, particularly a kind of multistage subsection is exempted from slip casting from expansion chuck anchoring rod.

Background technology

Anchor pole is that pulling force is delivered to stable rock stratum or the anchoring system of the soil body.In geotechnical engineering, be used for fragmented rock body, loose rock mass or slippage rock mass to reinforce, the bearing capacity of rock mass is improved, improve the stability of rock mass.

At present, in tunnel construction, the anchor rod anchored end anchorage that mainly contains, total length bond-anchorage.End anchorage bolt shaft power is very large, high to rod body material intensity and section requirement, does not give full play to the mechanical function of anchor rod body.The frictional force size that after total length bond-anchorage solidifies with slip casting plumpness, slurries, paste materials intensity produces is relevant, but in slip casting process, slurries are difficult to control to rock (soil) body void diffusion situation, the situations such as obstruction happen occasionally, bolt grouting construction process requirement is high, difficulty of construction is large, affects anchor rod anchored effect performance and affects construction speed; Construction period is long, on the workmanship of whole construction of tunnel and progress, all affects larger.

Summary of the invention

Not enough in order to overcome existing anchor pole, the invention provides a kind of multistage subsection and exempt from slip casting from expansion chuck anchoring rod.        

The technical solution adopted for the present invention to solve the technical problems is: multistage subsection is exempted from slip casting from expansion chuck anchoring rod, comprises anchor bar body, and anchor bar body cover has sleeve pipe, and sleeve pipe upper end is provided with conical head; Anchor bar body is provided with 2~10 annular frustums, on the anchor bar body of each annular frustum below, by cuff, be installed with one group of four symmetrical voussoir, cuff is arranged in the limit base of voussoir, below every group of voussoir of sleeve pipe inner side, be provided with four symmetrical boss, boss is provided with the spring that upwards holds out against voussoir; On the plastic bushing of the correspondence position of voussoir, offer bar shaped square hole; Bar shaped square hole width is greater than voussoir width; The afterbody of anchor bar body is provided with external screw thread.

The bar shaped square hole quantity of offering on the plastic bushing of described every group of voussoir and correspondence position is identical, and every group of voussoir is 2~4 and is symmetric.

Described anchor bar body is provided with 2~10 groups of voussoirs.

The diameter of described conical head bottom is greater than plastic bushing external diameter.

Described voussoir is that cast iron quality is made.

Described sleeve pipe is that PVC material is made.

Described conical head is that PVC material is made.

Described cuff is that steel matter is made.

Anchor pole front end has and expands conical head and be beneficial to anchor pole and enter in boring, by tightening the nut of anchor pole afterbody, make anchor rod body and plastic bushing generation relative displacement, annular frustum promotes voussoir Compress Spring, voussoir stretches out from the bar shaped square hole position of sleeve pipe, and voussoir expands under the effect of annular frustum outside pipe, is mounted on hole wall rock, bring into play anchor rod anchored effect, cuff is fixed in the limit base of voussoir, and the opening angle of the chamfering of cuff and voussoir restriction voussoir, makes voussoir can not depart from anchor pole; After completing anchoring, do not need to carry out again the anchorage effect that bolt grouting work progress can reach design, greatly improve the surrounding rock stability of construction of tunnel, shortened construction period, improved work efficiency.

The invention has the beneficial effects as follows, the structure design of anchor pole is unique, and anchoring strength is large, solid and reliable, construction technology simple and fast, does not need bolt grouting work progress can reach design anchoring strength, greatly improves the surrounding rock stability of construction of tunnel, shortened construction period, and can increase anchor rod anchored segment length, and reduce anchor rod body section area, reduce whole engineering steel amount, reduce construction costs, there is good economic worth.

Accompanying drawing explanation

Fig. 1 is structural representation of the present invention;

Fig. 2 is enforcement schematic diagram of the present invention.

Component and numbering in figure:

1-anchor bar body; 2-conical head; 3-sleeve pipe; 4-annular frustum; 5-cuff; 6-voussoir; 7-boss; 8-spring; 9-bar shaped square hole; 10-backing plate; 11-nut.

The specific embodiment

Below in conjunction with drawings and Examples, the present invention is further described, and the present embodiment is exemplary, only for explaining the present invention, rather than limitation of the present invention.

As shown in Figure 1, multistage subsection is exempted from slip casting from expansion chuck anchoring rod, comprises anchor bar body 1, and anchor bar body 1 cover has sleeve pipe 3, and sleeve pipe 3 upper ends are provided with conical head 2; Anchor bar body 1 is provided with 2~10 annular frustums 4, on the anchor bar body 1 of each annular frustum 4 below, by cuff 5, be installed with one group of four symmetrical voussoir 6, cuff 5 is arranged in the limit base of voussoir 6, below every group of voussoir 6 of sleeve pipe 3 inner sides, be provided with four symmetrical boss 7, boss 7 is provided with the spring 8 that upwards holds out against voussoir 6; On the plastic bushing 3 of the correspondence position of voussoir 6, offer bar shaped square hole 9; Bar shaped square hole 9 width are greater than voussoir 6 width; The afterbody of anchor bar body 1 is provided with external screw thread.

Described every group of voussoir 6 is identical with bar shaped square hole 9 quantity of offering on the plastic bushing 3 of correspondence position, and every group of voussoir 6 is 2~4 and is symmetric.

Described anchor bar body 1 is provided with 2~10 groups of voussoirs 6.

The diameter of described conical head 2 bottoms is greater than plastic bushing 3 external diameters.

Described voussoir 6 is made for cast iron quality.

Described sleeve pipe 3 is made for PVC material.

Described conical head 2 is made for PVC material.

Described cuff 5 is made for steel matter.

1-anchor bar body; 2-conical head; 3-sleeve pipe; 4-annular frustum; 5-cuff; 6-voussoir; 7-boss; 8-spring; 9-bar shaped square hole; 10-backing plate; 11-nut.

In constructing tunnel, at tunnel top and sidepiece, hole in advance, boring is slightly larger than the diameter of conical head 2, by anchor bar body 1, conical head 2, sleeve pipe 3, annular frustum 4, cuff 5, voussoir 6, boss 7, spring 8 has assembled, insert and hole and reach after projected depth, afterbody suit backing plate 10 at anchor bar body 1, at the external screw thread of the afterbody of anchor bar body 1, be inserted in nut 11 fastening, the nut 11 of anchor bar body 1 afterbody of screwing up with a wrench makes anchor bar body 1 and sleeve pipe 3 that relative displacements occur, annular frustum 4 promotes from bar shaped square hole 9 positions of sleeve pipe 3, to stretch out after voussoir 6 Compress Springs 8, voussoir 6 expands under annular frustum 4 effects outside sleeve pipe 3, be mounted on hole wall rock, as shown in Figure 2, bring into play anchor rod anchored effect, cuff 5 is fixed in the limit base of voussoir 6, and the opening angle of the chamfering restriction voussoir 6 of cuff 5 and voussoir 6, makes voussoir 6 can not depart from anchor bar body 1, now, respectively the organizing on the rock that voussoir 6 is mounted in hole wall simultaneously of anchor bar body 1, thus given play to best anchorage effect.After completing anchoring, do not need to carry out again the anchorage effect that bolt grouting work progress can reach design.

Anchor rod anchored intensity of the present invention is high, solid and reliable, construction technology is simple, do not need bolt grouting construction, can greatly improve the surrounding rock stability of construction of tunnel, shorten construction period, and can increase anchor rod anchored segment length, reduce anchor rod body section area, reduce engineering steel amount, there is good economic worth.

Claims (8)

1. multistage subsection is exempted from slip casting from an expansion chuck anchoring rod, it is characterized in that, comprises anchor bar body (1), and described anchor bar body (1) cover has sleeve pipe (3), and sleeve pipe (3) upper end is provided with conical head (2); Described anchor bar body (1) is provided with 2~10 annular frustums (4), the anchor bar body (1) of each annular frustum (4) below is above installed with one group four symmetrical voussoirs (6) by cuff (5), cuff (5) is arranged in the limit base of voussoir (6), every group of voussoir (6) below in sleeve pipe (3) inner side is provided with four symmetrical boss (7), and boss (7) is provided with the spring (8) that upwards holds out against voussoir (6); On the plastic bushing (3) of the correspondence position of described voussoir (6), offer bar shaped square hole (9); Described bar shaped square hole (9) width is greater than voussoir (6) width; The afterbody of described anchor bar body (1) is provided with external screw thread.
2. multistage subsection according to claim 1 is exempted from slip casting from expansion chuck anchoring rod, it is characterized in that, described every group of voussoir (6) is identical with bar shaped square hole (9) quantity of offering on the plastic bushing (3) of correspondence position, and every group of voussoir (6) is 2~4 and is symmetric.
3. multistage subsection according to claim 1 is exempted from slip casting from expansion chuck anchoring rod, it is characterized in that, described anchor bar body (1) is provided with 2~10 groups of voussoirs (6).
4. multistage subsection according to claim 1 is exempted from slip casting from expansion chuck anchoring rod, it is characterized in that, the diameter of described conical head (2) bottom is greater than plastic bushing (3) external diameter.
5. multistage subsection according to claim 1 is exempted from slip casting from expansion chuck anchoring rod, it is characterized in that, described voussoir (6) is made for cast iron quality.
6. multistage subsection according to claim 1 is exempted from slip casting from expansion chuck anchoring rod, it is characterized in that, described sleeve pipe (3) is made for PVC material.
7. multistage subsection according to claim 1 is exempted from slip casting from expansion chuck anchoring rod, it is characterized in that, described conical head (2) is made for PVC material.
8. multistage subsection according to claim 1 is exempted from slip casting from expansion chuck anchoring rod, it is characterized in that, described cuff (5) is made for steel matter.
CN201210185294.0A 2012-06-07 2012-06-07 Multistage sectional grouting-free self-expansion type anchoring rod CN102691514B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201210185294.0A CN102691514B (en) 2012-06-07 2012-06-07 Multistage sectional grouting-free self-expansion type anchoring rod

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201210185294.0A CN102691514B (en) 2012-06-07 2012-06-07 Multistage sectional grouting-free self-expansion type anchoring rod

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CN102691514A CN102691514A (en) 2012-09-26
CN102691514B true CN102691514B (en) 2014-02-05

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Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103321223B (en) * 2013-07-09 2015-09-16 中国电建集团成都勘测设计研究院有限公司 Expander, expansion type exempt from grouting anchor cable device and cable bolting method
CN103939120B (en) * 2014-05-12 2016-01-20 罗宗帆 A more piece self-expanding anchor pole
CN104831748A (en) * 2015-05-13 2015-08-12 江创葵 Wall body and rapid and simple series-connection construction method thereof
CN104805839B (en) * 2015-05-13 2017-11-21 江创葵 A kind of engineering anchor
CN105257328B (en) * 2015-11-30 2017-07-28 湖南科技大学 A kind of the segmentation archoring slip casting archoring-balt device and its anchoring process of energy automatic clamping
CN105863695B (en) * 2016-05-03 2017-11-03 许国安 A kind of anti-large deformation of sectional modular and shock resistance assembled bolt and its assemble method
CN109236337B (en) * 2018-09-26 2020-08-11 中南大学 Arrow anchor rod anchored by multi-section type clamping grouting and using method thereof
CN110206573A (en) * 2019-04-10 2019-09-06 广东工业大学 A kind of multifunctional expanded formula recoverable anchor rod
CN110578542B (en) * 2019-09-19 2020-09-08 中国矿业大学 High-stress rock burst roadway anchor rod, design method and working method

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2238911Y (en) * 1995-12-12 1996-10-30 李永和 Whole-long anchor fixed wedge expansion plastic-steel whole-long archor pin
CN200968002Y (en) * 2006-11-15 2007-10-31 武汉武大巨成加固实业有限公司 Multiple layer back taper type wedge-locking roofbolt
CA2673812A1 (en) * 2008-07-24 2010-01-24 Hilti Aktiengesellschaft Anchoring element
CN202117696U (en) * 2011-07-08 2012-01-18 浙江普泰克金属制品有限公司 Multi-corrosion-resistant shell-expansion type hollow prestressed grout injection anchor bolt
CN202139588U (en) * 2011-06-18 2012-02-08 山东大学 Novel self-broaching anchor rod
CN202596759U (en) * 2012-06-07 2012-12-12 中铁西南科学研究院有限公司 Multi-stage subsection grouting-free self-swelling tight type anchoring rock bolt

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2238911Y (en) * 1995-12-12 1996-10-30 李永和 Whole-long anchor fixed wedge expansion plastic-steel whole-long archor pin
CN200968002Y (en) * 2006-11-15 2007-10-31 武汉武大巨成加固实业有限公司 Multiple layer back taper type wedge-locking roofbolt
CA2673812A1 (en) * 2008-07-24 2010-01-24 Hilti Aktiengesellschaft Anchoring element
CN202139588U (en) * 2011-06-18 2012-02-08 山东大学 Novel self-broaching anchor rod
CN202117696U (en) * 2011-07-08 2012-01-18 浙江普泰克金属制品有限公司 Multi-corrosion-resistant shell-expansion type hollow prestressed grout injection anchor bolt
CN202596759U (en) * 2012-06-07 2012-12-12 中铁西南科学研究院有限公司 Multi-stage subsection grouting-free self-swelling tight type anchoring rock bolt

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