On both sides of domestic highways, railways, and tunnel entrances, slopes of different heights can be seen everywhere. The reinforcement and support of the slopes affect road safety. What is the effect of the self-drilling bolt on the slope?

The Effect of Self-Drilling Anchor Rod for Slope Driving

The application of self-drilling bolts in slopes is mainly in the reinforcement and management of loose soil retaining walls. After a period of time, the retaining walls are prone to collapse risk, and it is necessary to regularly check whether reinforcement and repair are required. For retaining walls with loose soil, ordinary steel anchors are easy to collapse holes, while self-Drilling anchors have been successfully applied and performed well in projects with difficult geological drilling.

The self-drilling hollow bolt is used as a soil nail, and the drilling depth is 9m, first through the 4m retaining wall, and then through the 5m fill layer, and then drill into the rock. The construction adopts a pneumatic down-the-hole impact drilling rig, which is equipped with a shank shank, which is installed at the front end of the impactor to connect the anchor rod. The project performed well after construction, and successfully solved the problem of reinforcement of the retaining wall that was difficult to form holes.

How to Hit the Self-Drilling Bolt on the Slope

According to the different construction equipment, the construction method of the self-drilling hollow bolt will be slightly different. The self-drilling hollow bolt itself has the functions of drilling, grouting and bolting at one time. It is more convenient to use a high-slope split drilling rig for construction on the slope.

Preparation

According to the construction requirements, it is decided whether to set up scaffolding. If the terrain conditions are good, it can be equipped with a special drilling rig for self-drilling bolts, but it is necessary to ensure that the ground is flat. If the geological conditions are not good, a split drilling rig can be used, and the power station, the operating table, and the main engine are flexibly connected by hydraulic pipelines, which is more convenient for construction.

Connect the Anchor Rod

The structure of self-advance hollow grouting bolt is mainly divided into hollow bolt body, connecting sleeve, drill bit, backing plate and nut. According to the needs, it is matched with a centerer or a wedge body, and the drill bit is screwed to one end of the hollow bolt body. According to the design Depth selection is required to install a connecting sleeve. The full-length thread of the self-feeding hollow bolt can be cut and connected arbitrarily.

Connect the Rig

The self-drilling hollow bolt special drilling rig connects the bolt tail and the grouting machine through the adapter, which can realize simultaneous drilling and grouting, and has high drilling efficiency. It has been successfully applied in many projects. The construction site of the high-slope split drilling rig is highly adaptable, easy to move, install and transport, and has great potential for modification, which can be modified and upgraded according to actual needs.

Drill and Grout

Before grouting, the hole needs to be cleaned first, then the anchor rod is extended for drilling, and the grouting is performed while drilling, and the anchor rod is the drill rod. It has changed the previous construction technology of drilling with pipes, the construction efficiency is faster, and the anchoring effect is better.

Install the Backing Plate Nut

After the drilling and grouting are completed, the backing plate and the nut can be installed. All the accessories of the self-drilling bolt can be installed with the hollow bolt. The installation method is simple, the degree of rotation is good, and the force value is better completed.

The above is an introduction to the effect and construction method of the self-drilling rock bolt for the slope. Although the material cost of ordinary steel bar and pipe drilling is low, the labor cost is high and the overall cost is high. Although the material cost of the self-drilling rock bolt is high, the labor dependence is low, the construction progress is fast, and the comprehensive cost is low.

Categories

Slope Stabilization

Keywords

self drilling rock bolts, soil nail