Annular extension limit flexible pressurized grouting bolt

Abstract

The invention involves geotechnical and mine engineering supporting facilities technology field, in particular relates to a hoop limited extension flexible casting and pressing anchor bar. It bases the bar body structure of prior 'flexible casting and pressing anchor bar', imbeds the fiber or steel line or armored rope or the woven fabric of them with length-constant extension structure circumferentially into the outer layer perimeter of longitudinal reinforced layer in the bar body of flexible casting and pressing anchor bar, and it reinforces the whole body of the anchor bar body. It also improves the integrated structure of prior anchor bar and pallet into the assembling structure of anchor bar and pallet. The invention also has advantages as followings on the basement of maintaining prior technology application effect: the circumferential reinforced structure of anchor bar body limits the deforming amount of bar body, strengthens the integral strength of anchor bar body, avoids anchor bar body abatement caused by bar cavity leakage generated by creep deformation and other reasons; when the avalanches of anchor hole port happen or the anchor hole has honeycomb gaps, the anchor bar will not deform limitlessly than the anchor bar abatement is leaded out; the pallet is changed into assemblage structure to make the installation of anchor bar more convenient.

Description

1. Technical field [0001] The invention relates to the technical field of rock soil and mine engineering support facilities, in particular to a flexible pressure-injection bolt with limited extension in the circumferential direction. 2. Background technology [0002] In the mining process of geotechnical, tunnel and coal mines, bolt support is a surrounding rock control technology with two functions of support and reinforcement. Compared with frame support, the use of bolt support technology has significant economic benefits. [0003] Traditional bolts can be divided into full-length anchor bolts and end anchor bolts. The materials used for full-length anchor bolts are all rigid materials, which are filled and bonded with the anchored rock formations through various adhesives; this type of anchor bolts mainly has the following disadvantages: 1. The construction and installation are complicated, and the construction period 2. It is impossible to compensate the change of the ...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the defect that the existing "flexible injection anchor" has no limitation on the circumferential deformation of the rod body, resulting in insufficient strength, and to invent a method that can not only maintain the existing advantages of the "flexible injection anchor", but also can Limit the amount of circumferential deformation of the bolt body, and through measures to improve the circumferential strength of the bolt body, the overall strength of the bolt body is strengthened "circumferential limited extension flexible injection pressure anchor"

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