SOIL NAILING :A POTENTIAL SOLUTION TO LANDSLIDE PROBLEMSnitjsr.ac.in/course_assignment/CE10CE-...
Transcript of SOIL NAILING :A POTENTIAL SOLUTION TO LANDSLIDE PROBLEMSnitjsr.ac.in/course_assignment/CE10CE-...
SOIL NAILING
Dr. A. K. Choudhary
Professor & Ex-Head
Department of Civil Engineering
E-mail: [email protected]
N.I.T. Jamshedpur - 831014
3/31/2020 Prof. A.K.Choudhary
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.
3/31/2020 Prof. A.K.Choudhary
TYPES OF SOIL NAIL
Screw anchor soil nail
Grouted soil nail
3/31/2020 Prof. A.K.Choudhary
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
3/31/2020 Prof. A.K.Choudhary
3/31/2020 Prof. A.K.Choudhary
IDEAL CONDITIONS FOR SOIL NAILING
Height of excavation
Excavation Face Inclination
Type of soil
Nail length
Nail inclination
Nail diameter
Grouted hole diameter
3/31/2020 Prof. A.K.Choudhary
APPLICATIONS
Landslide Remediation
Railway embankments
Roadway widening under existing bridges
Stabilizing of existing retaining walls
Highway embankments and cuttings
3/31/2020 Prof. A.K.Choudhary
3/31/2020 Prof. A.K.Choudhary
ADVANTAGES
Cost
Time
Applicable in almost all type of soils
Construction equipments
Performance
Construction flexibility
Environmental and aesthetic considerations
3/31/2020 Prof. A.K.Choudhary
LIMITATIONS
Temporary stand-up time
Excavation below the water level
Excavation in soft clay.
3/31/2020 Prof. A.K.Choudhary
COMPARATIVE STUDY OF SOIL NAILING AND REINFORCED SOIL
Soil properties
Method of installing reinforcing elements
Construction process
Facing
Inclination of reinforcing elements
3/31/2020 Prof. A.K.Choudhary
DESIGN STEPS
Feasibility Assessment
Internal stability
External stability
3/31/2020 Prof. A.K.Choudhary
TYPICAL CROSS SECTION OF SOIL
NAILED WALL
3/31/2020 Prof. A.K.Choudhary
Salient Points
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.
3/31/2020 Prof. A.K.Choudhary
THANK YOU !!!!!!
3/31/2020 Prof. A.K.Choudhary