ROCK ANCHORS â THEN AND NOW - Geosystems, LP

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Sept 2003 3.4 Tendon Now: • Tendon specified • No use of wire tendons • Class 1 – Class 2 Corrosion Protection • Use of epoxy coated strand
How to provide the needed Corrosion Protection? • Extrusion Sheathed Strand – Complete filling of all Interstices with Corrosion Inhibitor – No Voids • Epoxy Coated Strand – ASTM A-882, A revised 2002 – Coating is a barrier to corrosion, – If damaged, Local Galvanic Cell may occur • Corrugated Outer Duct – Barrier to corrosion elements – Larger dia. duct is job site installed. Sept 2003 – Larger dia. drill hole may be required.
Page 1 and 2: Sept 2003 GEOSYSTEMS, L.P (724) 942
Page 3 and 4: Sept 2003 1. Background • Large d
Page 5 and 6: Sept 2003 GEOSYSTEMS, L.P. Now: Exa
Page 7 and 8: Normal Anchor Design ASSUMPTION Str
Page 9 and 10: Sept 2003 1 (f eff) EFFICIENCY FACT
Page 11 and 12: Normal 10 m anchor capacity vs. 10
Page 13 and 14: Sept 2003 3.1 Drilling Then: • Di
Page 15 and 16: Rock Drilling Methods 1. Rotary Sep
Page 17 and 18: Sept 2003 Circulation Type and Appl
Page 19 and 20: Sept 2003 Circulation Type and Appl
Page 21 and 22: Table 2. Summary of recorded drill
Page 23 and 24: Sept 2003 Recording of Drilling Pro
Page 25 and 26: Sept 2003 3.2 Water Pressure Testin
Page 27 and 28: Sept 2003 3.3 Grouting Then: • Pr
Page 29 and 30: Sept 2003 Trial Mixes • Cement se
Page 31: Sept 2003 3.4 Tendon Then: • Cont
Page 35 and 36: Corrosion Protection Decision Tree
Page 37 and 38: Sept 2003 4. Stressing and Testing
Page 39 and 40: Anchor Tests - General 1. Pre-produ
Page 41 and 42: Graphical Analysis of Performance T
Page 43 and 44: Graphical Analysis of Proof Test Da
Page 45 and 46: Special Considerations for Epoxy Co
Page 47: Sept 2003 6. Overview THEN NOW Geot

ROCK ANCHORS â THEN AND NOW - Geosystems, LP

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ROCK ANCHORS â THEN AND NOW - Geosystems, LP