Soil Nail

Information

Soil nails are long and thin metal components (can be rod or tube), placed in the ground, through full-length grouting and other ways to make it combined with the ground as a whole, serve to restrain ground deformation and strengthen slopes.

soil nail
soil nail in slope

SDA Bolt as Soil Nail

Self-drilling rock bolt is a one-time completion of the three processes of drilling, soil nail implantation and grouting, which obviously improves the construction efficiency, in addition to the ground disturbance is very small, but also can be applied to the prestressing, which is conducive to reducing the support displacement of the slope. During the construction, while drilling, grouting is injected from the middle hole of the hollow anchor bar, the slurry overflows from the drill bit and mixes into the hydromud soil slurry with the strata of the drilling rod, which combines the self-drilling anchor and the strata into a whole after the slurry is solidified, i.e., both the effect of soil and the effect of soil nails can be reflected.

Construction of Self-drilling Rock Bolt as Soil Nail

The sequence of soil nail construction can include five main processes:
a) preliminary work;
b) excavation / face preparation;
c) nail installation;
d) drainage installation;
e) facing installation and connection with nail heads.

NOTE: The order of these processes depends on compliance with the design construction sequence and requirements and can vary.

soil nail in foundation

Advantages of Self-drilling Soil Nail

The advantages of use self-drilling rock bolt as soil nails include the following aspects:

Versatile Soil Layer Application

Applicable to all kinds of soil layers, especially in the conventional process is not easy to construct powdery soil, or sandy soil in the use of better results

Unlimited Anchor Bar Length

The length of conventional anchor bar is only 12-15 meters, but the self-drilling rock bolt could be arbitrarily spliced or truncated, the length of the hollow anchor bar is not limited

Suitable for Narrow Spaces

Applicable to the construction of narrow spaces, due to the small drilling resistance of these rock bolts, the drilling depth can be much larger, the drilling speed is higher

Simplified Construction Process

Simple process, these bolts will be drilling, anchoring, and grouting in a single drilling completed, simplify the process, improve construction speed and cost savings

Effective Pressure Grouting

Pressure grouting can make the slurry penetrate the micro-fracture of the soil body, increase the diameter of the grouting body thereby enhancing its safety factor

Soil Nail Project

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