SOIL NAILING

1. SOIL NAILINGSOIL NAILING
Presented by
Shaik.Asif.Ahmed[ASIF’ASHU]

2. ABSTRACT:
Soil nailing is being used in many geotechnical
applications to improve stability of excavated vertical cuts and
existing slopes.
This paper presents a few case studies on the
stabilization of a vertical cut and improvement of slope stability
using soil-nailing technique.
It was found that the vertical cut stability/slope stability
improved due to the reinforcing effect of nails.
The study illustrates that the technique is a viable
technique to improve the stability of vertical cuts and stability of
existing slopes and its advantages need to be exploited on a
large scale in infrastructure projects.

3. INTRODUCTIONINTRODUCTION
Soil nailing is a technique used toSoil nailing is a technique used to
reinforce and strengthen existing groundreinforce and strengthen existing ground
Soil nailing consists of installing closelySoil nailing consists of installing closely
spaced bars into a slope or excavation asspaced bars into a slope or excavation as
construction proceeds from top downconstruction proceeds from top down
The grouted nails increases shearThe grouted nails increases shear
strength of overall soil mass.strength of overall soil mass.

4. TYPES OF SOIL NAILTYPES OF SOIL NAIL
Screw anchor soil nailScrew anchor soil nail
Grouted soil nailGrouted soil nail

5. PROCEDURE OF SOIL NAILINGPROCEDURE OF SOIL NAILING
Excavate small cutExcavate small cut
Drill hole for nailDrill hole for nail
Install & grout nailInstall & grout nail
Place drainage strips, initial shotcretePlace drainage strips, initial shotcrete
layer & install bearing plateslayer & install bearing plates
Repeat process to final gradeRepeat process to final grade
Place final facing on permanent wallsPlace final facing on permanent walls

7. IDEAL CONDITIONS FOR SOILIDEAL CONDITIONS FOR SOIL
NAILINGNAILING
Height of excavationHeight of excavation
Excavation Face InclinationExcavation Face Inclination
Type of soilType of soil
Nail lengthNail length
Nail inclinationNail inclination
Nail diameterNail diameter
Grouted hole diameterGrouted hole diameter

8. APPLICATIONSAPPLICATIONS
Landslide RemediationLandslide Remediation
Railway embankmentsRailway embankments
Roadway widening under existing bridgesRoadway widening under existing bridges
Stabilizing of existing retaining wallsStabilizing of existing retaining walls
Highway embankments and cuttingsHighway embankments and cuttings

12. ADVANTAGESADVANTAGES
CostCost
TimeTime
Applicable in almost all type of soilsApplicable in almost all type of soils
Construction equipment'sConstruction equipment's
PerformancePerformance
Construction flexibilityConstruction flexibility
Environmental and aesthetic considerationsEnvironmental and aesthetic considerations

13. LIMITATIONSLIMITATIONS
Temporary stand-up timeTemporary stand-up time
Excavation below the water levelExcavation below the water level
Excavation in soft clay.Excavation in soft clay.

14. COMPARATIVE STUDY OF SOILCOMPARATIVE STUDY OF SOIL
NAILING AND REINFORCEDNAILING AND REINFORCED
SOILSOIL
Soil propertiesSoil properties
Method of installing reinforcing elementsMethod of installing reinforcing elements
Construction processConstruction process
FacingFacing
Inclination of reinforcing elementsInclination of reinforcing elements

15. DESIGN STEPSDESIGN STEPS
Feasibility AssessmentFeasibility Assessment
Internal stabilityInternal stability
External stabilityExternal stability

16. TYPICAL CROSS SECTION OFTYPICAL CROSS SECTION OF
SOIL NAILED WALLSOIL NAILED WALL

17. CONCLUSIONCONCLUSION
Soil nailing is a potential solution ofSoil nailing is a potential solution of
landslide problems as it is economical andlandslide problems as it is economical and
also applicable in seismic zones.also applicable in seismic zones.
It can solve the problem of residentialIt can solve the problem of residential
area up to a great extent.area up to a great extent.
It can be used in wide soil types.It can be used in wide soil types.

18. THANK YOU
ANY QUESTION?