Slip casting roof bolt with anticorrosive casing pipe

Abstract

The invention opened an injected anchor arm with the antiseptic spigot, which is composed of the anchor arm body, the connection part of the porthole, the spigot, anchoring head, holding pad, the tight nut and the gasket. The invention can form the supporting anchorage power quickly to control the deforming of the terrene; also it can form a supporting system of multi-antiseptic barrier with the spigot and the double injected plasma.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering anchoring support, and relates to a grouting anchor rod with an anti-corrosion casing, which is suitable for stratum structure support in underground engineering, mining engineering, foundation pit and slope engineering, and the like. Background technique [0002] In the process of underground engineering, mining engineering, foundation pit and slope engineering involved in geotechnical engineering, in order to prevent the formation from deforming, collapsing or destabilizing and endangering safety, a main support technology for strengthening the formation is to use bolts. Through the high-strength tensile capacity of the bolt installed in the formation and the dense combination between the bolt and the grouting body around the anchor and the formation, the formation is strengthened to improve the integrity of the formation and play a role. Various mechanical effects such as shear...

AI Technical Summary

Problems solved by technology

The disadvantages are: 1) It is difficult to guarantee the fullness of the slurry, and because of the deviation phenomenon when inserting the steel bar, the thickness of the steel bar protective layer is not easy to be uniform, and the anchoring force is not large

Corrosion and destruction of steel bars

2) At the same time, because prestressing cannot be implemented, the grouting body cracks with the deformation of the steel bar, so that water vapor directly invades the steel bar, affecting the service life

3) Not suitable for broken ground

4) Since the bolt support force is formed after the mortar is slowly hardened, it is not suitable for occasions where the support force needs to be formed quickly

[0007] 2. Early-strength cement drug coil anchor and resin drug coil anchoring fully bonded solid anchor: Although the ordinary mortar solid anchor has been improved, the range of applicable strata is expanded and the supporting force can be quickly formed, but the anchor slurry The fullness of the body and the thickness of the steel protection layer are still difficult to guarantee due to structural problems, which affects the reliability of the bolt body

This technical solution focuses on the grouting support of extremely weak and broken rock formations, but its disadvantage is that the anchoring time of the grouting body is too long, and the anchoring force cannot be formed quickly due to technological reasons, so it is not suitable for strata that require rapid support

Images