soil nailing
TRANSCRIPT
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.
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