Support Technology Combined Self-drilling Soil Nail with Retaining Wall

by Anna S. Optimization Specialist

Introduction of Self-Drilling Hollow Rock Bolt

Composition Structure

Self-drilling hollow rock bolt is mainly composed of a hollow bolt body, a nut, a backing plate, a coupler, a centralizer, and a drill bit. It integrates the functions of drilling, grouting, and anchoring. Self-drilling hollow bolts can be used for slope support, foundation pit support, pile foundation support, tunnel tube shed support and system support, foundation support for transmission towers or wind towers, and repair of old buildings.

Construction Advantages

While drilling, it can be connected with a grouting machine for grouting to achieve the anchoring effect. The construction efficiency is higher than that of ordinary hollow bolts, and it is suitable for broken and difficult-to-form surrounding rocks;

There is no need for casing wall protection during construction, which can greatly improve the construction efficiency, shorten the construction period and reduce the overall cost of the project;

The hollow bolt body can be arbitrarily cut and lengthened by connecting sleeves. Therefore, the self-drilling hollow bolt can also be constructed in narrow spaces where large equipment cannot enter;

Compared with the conventional drill pipe, there are various types of drill bits, which can be selected according to the properties of different rock layers and soil during construction, which can improve the drilling efficiency.

Retaining Wall

A retaining wall refers to a structure that supports the subgrade fill or hillside soil and prevents the fill or soil from being deformed and unstable. Retaining walls are generally divided into gravity retaining walls, anchored retaining walls, thin-wall retaining walls, and reinforced earth retaining walls. The soil nail type retaining wall belongs to the anchor type retaining wall in the anchor type retaining wall. The main functions are:

1. The shoulder wall or embankment wall is set below the high-fill embankment or the steep-slope embankment, which can prevent the subgrade slope or base from sliding, ensure the stability of the subgrade, and at the same time shrink the foot of the filling slope, reduce the amount of filling, and reduce demolition and land occupation. area, and the protection of existing buildings adjacent to the line;

2. For riverside and reservoir embankments, setting up retaining walls on the waterside side can prevent the erosion and erosion of the embankment by the water flow, and is also an effective measure to reduce the compression of the riverbed or occupy less storage capacity;

3. The retaining wall set at the entrance of the tunnel or the opening of the tunnel can shorten the length of the tunnel or the opening of the tunnel and reduce the project cost;

4. The retaining walls set at both ends of the bridge, as wing walls or abutments, play the role of protecting the abutment and connecting the embankment;

5. Anti-slip retaining walls can be used to prevent landslides.

Self-drill soil nail retaining wall is a kind of reinforced retaining wall, which can be used to stabilize roadbeds, prevent slope sliding, strengthen soft soil foundation, improve the bearing capacity of the foundation, etc. It is widely used in geotechnical engineering.

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Created on Jul 27th 2022 04:16. Viewed 143 times.

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