Contact US

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Corrosion protection for Rock Anchors

Corrosion protection for Rock Anchors

Corrosion protection for Rock Anchors

The design for a basment under 5m head of water called for "ground anchors" to resist the buoyancy forces. The contractor has proposed "tension piles" using 40mm GEWI bar. The codes require "double corrosion" protection for ground anchors but are not so stringent for tension piles or soil nails? Although in this case the proposed single tension pile (no initial prestress proposed) has been galvanised to give nominal corrosion protection. The ground water contains no contaminanates.
1. Any expert views on the corrosion protection aspects? 2. Or when a ground anchor is not a ground anchor but a tension pile or soil nail?


RE: Corrosion protection for Rock Anchors

Will the pile, nails, or rock anchor be exposed to the air?  If not then you can safely eliminate the formation of oxides as it requires oxygen for the reaction to take place.

Rock anchors aren't generally as large as piles and nails and perhaps there has been some sacrificial thickness incorporated into the design of those elements.

RE: Corrosion protection for Rock Anchors

In North America, rock reinforcement bars are "double protected" by having an epoxy coating, and then using polyester resin or portland cement grout as the anchoring media or "glue."  I wrote a paper 2 years ago pulling together everything I could find on rock reinforcement corrosion and longevity.  It is in the 2000 Ground Control in Mining Conference from West Virginia University in Morgantown, WV, USA.  If the proceedings are not available to you, please contact me and I can fax or snail mail a copy of the paper "Rock Reinforcement Longevity."  frankatagapito@aol.com

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close