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Soil Nailing Method to prevent landslides

Table of contents
  • Context (TH): The ‘slope stabilisation using soil nailing and Hydroseeding method’ is being adopted in the Nilgiris to prevent landslides.

Nilgiris - PMF IAS

Credit: Technology for Wildlife Foundation

  • Soil nailing is a geotechnical engineering technique used to reinforce soil to make it more stable.
  • It is used for slopes, excavations, retaining walls, etc., to make it more stable.
  • It involves inserting slender rebars into the soil, laying reinforcing mesh on the slope surface, and applying concrete to form a composite body. This structure, akin to a gravity retaining wall, securely bonds reinforced rods with the surrounding soil.

Soil Nailing - PMF IAS

Credit: Larimit

  • Following the process of strengthening the slope, hydroseeding’ – a process of applying a mixture of seeds, fertilizer, organic materials and water onto the soil to facilitate the growth of grass and plant life, which will help hold the topsoil together and prevent erosion.


  • Stabilization of existing retaining wall
  • Excavating retaining structures in urban areas for high-rise buildings and underground facilities.
  • Landslide redemption
  • Stabilization of highway and roadway embankments and cut slopes
  • Steep cutting stabilisations
  • Stabilizing of over steep existing embankments


  • It mitigates slope instability by reinforcing the soil, preventing collapse, and enhancing overall slope stability.
  • It can improve the strength and stiffness of the soil while reducing the pore water pressure.
  • It is a fast, flexible, and economical slope stabilisation method that does not require extensive excavation, foundation, or equipment.
  • It can preserve the natural appearance of the slope by blending or vegetating the facing material.
  • Provide long-term stability to existing concrete structures without demolition and rebuilding costs.

Soil Nailing - PMF IAS

Credit: Zcctechno


  • Its effectiveness diminishes with increased depth.
  • Its efficacy is highly dependent on soil conditions, and unsuitable conditions may impact the overall stability achieved.
  • Environmental and safety risks associated, such as noise, vibration, dust, or slope instability during the installation process.
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