1. 1. GUIDE BY PRESENTED BY Ms JAMSHEER P KRISHNAPRASAD C S5 CIVIL 1 1
2. 2. OVER VIEW INTRODUCTION APPLICATIONS HISTORY OF SOIL NAILING TYPES OF SOIL NAILIG COMPONENTS OF A SOIL NAIL WALL MATERIALS USED FOR SOIL NAILING MACHINERIES USED PROCEDURE OF SOIL NAILING ADVANTAGES & DISADVANTAGES CONCLUSION 2
3. 3. INTRODUCTION Used 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. 3
4. 4. SOIL NAILING 4
5. 5. APPLICATIONS Landslide Remediation Railway embankments Roadway widening under existing bridges Stabilizing of existing retaining walls Highway embankments and cuttings 5
6. 6. APPLICATIONS 6Tunnel portals in steep slopes Stabilization of Highway cut slope Stabilization of Railroad Stabilization of steep slopes
7. 7. HISTORY OF SOIL NAILING New 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. 7
8. 8. TYPES OF NAILS USED Drilled and Grouted Soil Nail Driven Soil Nails Self Drilling Soil Nails 8
9. 9. COMPONENTS OF A SOIL NAIL WALL 9
10. 10. MATERIALS USED FOR SOIL NAILING Steel Reinforcements Grout Mix Shotcreting / Gunite 10
11. 11. MATERIALS USED FOR SOIL NAILING 11Grout Mix Reinforcements used in Soil Nailing Shotcreting
12. 12. MACHINERIES USED Drilling Equipments Grout Mixing Equipments Shotcreting/ Guniting Equipments Compressor 12
13. 13. Typical drilling equipment Grout Mixing Instrument Shotcreting is done using a pipe MACHINERIES USED 13compressor
14. 14. 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 14
15. 15. CONSTRUCTION SEQUENCES 15 DRILLING OF HOLESINITIAL EXCAVATION
16. 16. CONSTRUCTION SEQUENCES (CONT..) 16 NAIL INSTALLATION
17. 17. CONSTRUCTION SEQUENCES (CONT..) PLACE REINFORCEMENT AND DRAINAGE SHOTCRETING AND INSTALLING BEARING PLATES 17
18. 18. CONSTRUCTION SEQUENCES (CONT..) PERMANENT FACINGREPEAT STEPS TO FINAL SUBGRADE 18
19. 19. ADVANTAGES Shotcrete facing is less costly Grouting only once is required, saving time and labor. The technique is flexible, easily modified. Less impact on nearby properties Can be used for strengthening of either natural slope, natural or man- made cut slopes Allow excellent working space in front of the excavation face, Rapid and uses less construction materials Economical 19
20. 20. 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. 20
21. 21. REFERENCES 1. http://www.deepexcavation.com/en/soil-nail-wall 2. http://www.moretrench.com/b_literature_article.php 3. http://en.wikipedia.org/wiki/Soil_nailing 4. Manual for Design and Construction Monitoring of Soil Nail walls, US Department of Transportation, Federal Highway Administration. 5. Guide to Soil Nail Design and Construction, Geotechnical Engg Office, Civil Engineering and Development Department, The Government of the Hong Kong. 21
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