Download - SOIL NAILING
GUIDE BY PRESENTED BY JAMSHEER P KRISHNAPRASAD C CIVIL DEPARTMENT CIVIL
GUIDE BY PRESENTED BY Ms JAMSHEER P KRISHNAPRASAD C S5 CIVIL 1SOIL NAILING1
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OVER VIEWINTRODUCTIONAPPLICATIONSHISTORY OF SOIL NAILINGTYPES OF SOIL NAILIGCOMPONENTS OF A SOIL NAIL WALLMATERIALS USED FOR SOIL NAILINGMACHINERIES USEDPROCEDURE OF SOIL NAILING ADVANTAGES & DISADVANTAGESCONCLUSION
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INTRODUCTIONUsed to reinforce and strengthen existing ground.
Installing closely spaced bars into a slope or excavation.
It is an effective and economical method.
Act as a retaining wall for excavation support.
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SOIL NAILING4
APPLICATIONSLandslide Remediation
Railway embankments
Roadway widening under existing bridges
Stabilizing of existing retaining walls
Highway embankments and cuttings
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APPLICATIONS6
Tunnel portals in steep slopes Stabilization of Highway cut slopeStabilization of Railroad
Stabilization of steep slopes
HISTORY OF SOIL NAILINGNew Austrian Tunneling Method in 1960.
underground tunnel in Europe in 1970.
modern form was in France in 1972.
The United States first used soil nailing in 1976.
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TYPES OF NAILS USED
Drilled and Grouted Soil Nail
Driven Soil Nails
Self Drilling Soil Nails
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COMPONENTS OF A SOIL NAIL WALL
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MATERIALS USED FOR SOIL NAILINGSteel ReinforcementsGrout MixShotcreting / Gunite
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MATERIALS USED FOR SOIL NAILING
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Grout Mix Reinforcements used in Soil NailingShotcreting
MACHINERIES USED Drilling Equipments
Grout Mixing Equipments
Shotcreting/ Guniting Equipments
Compressor
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Typical drilling equipmentGrout Mixing InstrumentShotcreting is done using a pipeMACHINERIES USED 13
compressor
PROCEDURE OF SOIL NAILING
Excavate small cutDrill hole for nailInstall & grout nailPlace drainage strips, initial shotcrete layer & install bearing platesRepeat process to final gradePlace final facing on permanent walls
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CONSTRUCTION SEQUENCES15DRILLING OF HOLESINITIAL EXCAVATION
CONSTRUCTION SEQUENCES (CONT..)
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NAIL INSTALLATION
CONSTRUCTION SEQUENCES (CONT..)
PLACE REINFORCEMENT AND DRAINAGESHOTCRETING AND INSTALLING BEARING PLATES17
CONSTRUCTION SEQUENCES (CONT..) PERMANENT FACING REPEAT STEPS TO FINAL SUBGRADE18
ADVANTAGESShotcrete facing is less costlyGrouting only once is required, saving time and labor. The technique is flexible, easily modified.Less impact on nearby propertiesCan be used for strengthening of either natural slope, natural or man- made cut slopesAllow excellent working space in front of the excavation face,Rapid and uses less construction materialsEconomical19
CONCLUSION
Soil nailing is a potential solution of landslide problems.
Economical and also applicable in seismic zones.
It can be used in wide soil types.
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REFERENCEShttp://www.deepexcavation.com/en/soil-nail-wall http://www.moretrench.com/b_literature_article.php http://en.wikipedia.org/wiki/Soil_nailingManual for Design and Construction Monitoring of Soil Nail walls, US Department of Transportation, Federal Highway Administration.Guide to Soil Nail Design and Construction, Geotechnical Engg Office, Civil Engineering and Development Department, The Government of the Hong Kong.
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THANK YOU22