Soil Nailing Technique
What is soil nailing?
Soil nailing is a technique used to bring soil stability in areas where landslides might be a problem. Soil nail can prevent landslides by inserting hollow bar or steel reinforcement bar into the soil and anchoring them to the soil strata. It is called Soil Nail, because it’s like having a nail being hammered into the soil, where the nails, are the steel bars.
Depending on the complexity of the work, soil nailing can be ranging between $80 per square feet up to $200 per sf. Some contractors will use a software called Snail Plus to determine their soil nail design and complete preliminary assumptions on the soil nailing.
Soil Nail Installation Process
Soil nail provides a resisting force against slope failures. Its construction process is faster than other similar methods. The construction procedure starts, drilling into the soil, where the nail, hollow bar or steel bar, is going to be placed. After the drilling has been completed, exact depth must be provided by the geotechnical engineer, the nail must be inserted into the drilled hole. Then, it must be grouted into the soil to create a structure similar to a gravity wall. After placing the nail, a shot-Crete layer is usually placed as a facing material, to protect the exposed nail, and then other architectural options are placed over the shot-Crete, creating an aesthetic finish to the project.
Soil Nailing Advantages
Used to follow irregular curves.
Equipment is portable for tight spaces.
The technique is flexible, easily modified.
Creates less noise and traffic obstructions.
Less impact on nearby properties.
Requires minimum shoring space.