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