SOIL NAILING
Dr. A.K.Chaudhary
Assistant Professor
Department of Civil Engineering,
NIT, Jamshedpur
INTRODUCTION
Soil nailing is a technique used to
reinforce and strengthen existing ground
Soil nailing consists of installing closely
spaced bars into a slope or excavation as
construction proceeds from top down
The grouted nails increases shear strength
of overall soil mass.
TYPES OF SOIL NAIL
Screw anchor soil nail
Grouted soil nail
PROCEDURE OF SOIL NAILING
Excavate small cut
Drill hole for nail
Install & grout nail
Place drainage strips, initial shotcrete
layer & install bearing plates
Repeat process to final grade
Place final facing on permanent walls
IDEAL CONDITIONS FOR SOIL
NAILING
Height of excavation
Excavation Face Inclination
Type of soil
Nail length
Nail inclination
Nail diameter
Grouted hole diameter
APPLICATIONS
Landslide Remediation
Railway embankments
Roadway widening under existing bridges
Stabilizing of existing retaining walls
Highway embankments and cuttings
ADVANTAGES
Cost
Time
Applicable in almost all type of soils
Construction equipments
Performance
Construction flexibility
Environmental and aesthetic considerations
LIMITATIONS
Temporary stand-up time
Excavation below the water level
Excavation in soft clay.
COMPARATIVE STUDY OF SOIL
NAILING AND REINFORCED SOIL
Soil properties
Method of installing reinforcing elements
Construction process
Facing
Inclination of reinforcing elements
DESIGN STEPS
Feasibility Assessment
Internal stability
External stability
TYPICAL CROSS SECTION OF SOIL
NAILED WALL
CONCLUSION
Soil nailing is a potential solution of
landslide problems as it is economical and
also applicable in seismic zones.
It can solve the problem of residential
area up to a great extent.
It can be used in wide soil types.
THANK YOU !!!!!!