Soil Nailing Techniques

Soil nailing is the technique of strengthening the soil to give it more stability. The process involves hammering steel bars into the soil, hence the name “soil nailing”. This process of soil nailing provides a resisting force against slope failures. The process is faster than other similar methods.

The procedure starts by drilling into the soil where the “nail” steel bar is going to be placed. After the drilling is completed, the exact depth must be provided by a geotechnical engineer, then the nail is inserted into the drilled hole. After that is completed, it is grouted into the soil to create a structure similar to a gravity wall.

My Foundation Repairs uses Earth Contact Products (ECP), for soil nailing. These ECP soil nails are 1-1/2″ and 1-3/4 square bars with both 6″ or 8″ helix flights. The shaft lengths are 5′ and 7′ with an ultimate tensions strength of 70,000 lbs. and 100,000 lbs. The shaft is a solid bar.

soil nailing

Soil Nailing For Foundation Repair

When you have soil failure, you will have foundation problems. The soil needs to be stabilized and secure in order for a foundation to be stable. Most foundation problems are caused by soil failure.

My Foundation Repairs installs ECP soil nails to stabilize the soil. These soil nails are installed in an evenly spaced close geometric pattern. When installing a soil nail stabilization project, the soil nail installation and the excavation must be accomplished in incremental depths of 4 to 6 feet until the final depth is accomplished. Immediately following the incremental excavation of the soil and the soil nail installations, the vertical face of the soil is covered with a steel reinforced coating.

Soil nails are passive structural elements and are not tensioned after installation. The soil nail gains pullout resistance from within the sliding soil mass in front of the slip plane and the stable soil mass located behind the slip plane. The geometric system of soil nail placements creates an internally reinforced soil mass that is stable. Figure 4 shows a sketch of a typical soil nail installation. Soil nails are not tensioned after installation. They gain pullout resistance from within the sliding soil mass in front of the slip plane and the stable soil mass located behind the slip plane.

Each soil nail has a great number of helical plates. These helical plates are evenly spaced along the entire length of the shaft (a tieback anchor only has a few helical plates attached).

If you are in need of soil nailing to stabilize soil to prevent foundation failure, contact My Foundation Repairs. Our contractors use only the best products for foundation repair manufactured by ECP. Contact us today!

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