Multistage sectional grouting-free self-expansion type anchoring rod

A bolt and grouting technology, which is applied in the installation of bolts, mining equipment, earth square drilling, etc., to achieve the effect of reducing steel consumption, unique structural design, and high anchoring strength

Inactive Publication Date: 2012-09-26
中铁西南科学研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the shortage of existing anchor rods, the present in

Method used

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  • Multistage sectional grouting-free self-expansion type anchoring rod
  • Multistage sectional grouting-free self-expansion type anchoring rod
  • Multistage sectional grouting-free self-expansion type anchoring rod

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. This embodiment is exemplary and only used to explain the present invention, rather than limit the present invention.

[0020] Such as figure 1 As shown, the multi-stage segmented grouting-free self-expanding anchor bolt includes an anchor body 1, and the anchor body 1 is covered with a casing 3, and the upper end of the casing 3 is provided with a conical head 2; There are 2 to 10 annular frustums 4, and a group of four symmetrically distributed wedges 6 are fixedly installed on the anchor body 1 below each annular frustum 4 through a ferrule 5, and the ferrules 5 are arranged at the limit of the wedges 6. In the seat, four symmetrically distributed bosses 7 are arranged under each set of wedges 6 inside the casing 3, and springs 8 are arranged on the bosses 7 to push upward against the wedges 6; the corresponding positions of the wedges 6 The plastic c...

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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

technical field [0001] The invention relates to an anchor rod, in particular to a multi-stage segmented grouting-free self-expanding anchor rod. Background technique [0002] A bolt is an anchoring system that transmits tension to a stable rock formation or soil. In geotechnical engineering, it is used to reinforce broken rock mass, loose rock mass or sliding rock mass, so as to increase the bearing capacity of rock mass and improve the stability of rock mass. [0003] At present, in the construction of tunnel engineering, the bolt anchorage mainly includes end anchorage and full-length bonded anchorage. The axial force of the bolt anchored at the end is very large, and the requirements for the strength and section of the rod body are high, and the mechanical effect of the bolt body is not fully exerted. The full-length bonded anchorage is related to the fullness of the grout and the friction force generated by the strength of the grout material after the grout is solidifi...

Claims

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Application Information

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IPC IPC(8): E21D21/00
Inventor 袁顺德尚海松詹显军刘志强冷希乔舒波潘强
Owner 中铁西南科学研究院有限公司
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