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SOIL NAILING

SOIL NAILING. Dr. A.K.Chaudhary Assistant Professor Department of Civil Engineering, NIT, Jamshedpur. Soil nailing is a technique used to reinforce and strengthen existing ground

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SOIL NAILING

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  1. SOIL NAILING Dr. A.K.Chaudhary Assistant Professor Department of Civil Engineering, NIT, Jamshedpur

  2. 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. INTRODUCTION

  3. TYPES OF SOIL NAIL • Screw anchor soil nail • Grouted soil nail

  4. 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

  5. IDEAL CONDITIONS FOR SOIL NAILING • Height of excavation • Excavation Face Inclination • Type of soil • Nail length • Nail inclination • Nail diameter • Grouted hole diameter

  6. APPLICATIONS • Landslide Remediation • Railway embankments • Roadway widening under existing bridges • Stabilizing of existing retaining walls • Highway embankments and cuttings

  7. ADVANTAGES • Cost • Time • Applicable in almost all type of soils • Construction equipments • Performance • Construction flexibility • Environmental and aesthetic considerations

  8. LIMITATIONS • Temporary stand-up time • Excavation below the water level • Excavation in soft clay.

  9. COMPARATIVE STUDY OF SOIL NAILING AND REINFORCED SOIL • Soil properties • Method of installing reinforcing elements • Construction process • Facing • Inclination of reinforcing elements

  10. DESIGN STEPS • Feasibility Assessment • Internal stability • External stability

  11. TYPICAL CROSS SECTION OF SOIL NAILED WALL

  12. 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.

  13. THANK YOU !!!!!!

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