Stress-controller multi-level-open anchor stock and anchor construction method

Abstract

The invention discloses a stress-controller multi-level-open anchor arm and an anchor construction method. The stress-controller multi-level-open anchor arm comprises a screw rod. A base is fixed to an anchoring end. A free end passes a pallet. The space between the pallet and the end portion of the free end is the free section of the screw rod. The screw rod section between the pallet and the base forms the anchoring section. Adjusting screw nuts are screwed in the free section. A sleeve pipe is mounted on the anchoring section in a sleeving mode. M expansion seams which are in parallel with the axial direction of the screw rod are formed in the sleeve pipe to make M stripes be formed between the expansion seams. Z grooves are formed in each stripe. Two adjacent grooves on a same stripe are separately arranged in the inner wall and outer wall of the sleeve pipe in a crisscrossing mode. The stress-controller multi-level-open anchor stock has the advantages of being good in anchoring effect, small in use amount, low in process requirement, strong in anti-pulling capacity and the like. The method comprises the steps of assembling anchor arms, cleaning sites, drilling holes, cleaning holes, installing anchor arms, grouting and the like. The method has the advantages of being fast in construction speed, simple in process procedure and the like.

Description

technical field [0001] The invention belongs to the field of bolt support, and in particular relates to a stress-controlled multi-stage open bolt and an anchoring construction method. Background technique [0002] Anchor bolts have been widely used in today's construction projects. Bolt support is a reinforcement and support method used in surface engineering such as slopes, deep foundation pits, and underground chambers such as tunnels and stopes. The common forms of anchors are: pressure anchors, tension anchors, prestressed anchors, pressure dispersion anchors and tension dispersion anchors. However, these different types of bolts have their own limitations, and they cannot meet the requirements of bearing capacity and stability and economy, and at the same time, they can be constructed reasonably and conveniently. [0003] The general type of bolt support is to use a drilling machine to drill holes in the position where support is required, then place the anchor rod in ...

AI Technical Summary

Problems solved by technology

In order to increase the anchoring effect, the traditional type of bolt can only increase the length of the anchor section, increase the number of anchor bolts, and improve the strength of the mortar. It often has the following disadvantages: 1. The anchor section is too long to make the anchor length too long, which is uneconomical. And the effect of increasing the anchoring force is general

2. Anchor rods are often set too densely, which is inconvenient for construction, wastes materials and has poor stability

3. The mortar strength requirement is high, the cost is high, the mortar strength increases and the anchoring performance is limited, and requires a high construction process

4. The anchor structure is too simple, and the pull-out resistance is insufficient

5. The construction is more complicated and the construction speed is slower

Images