×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

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!
  • Students Click Here

*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

Jobs

Gabion Slope Mattresses

Gabion Slope Mattresses

Gabion Slope Mattresses

(OP)
Has anyone had much experience with slope mattresses? We are doing a scour remediation job for the State DOT and they love gabions and slope mattresses. They want stakes in the mattresses, but don't as of yet have any specification on them. Can anyone give me some good ideas as to how to space these things? We're using 4' long stakes in 6'x9'x12" matts.

Thanks,

Robert

RE: Gabion Slope Mattresses

I have used steel fence posts, driven through the gabion mattress at uniform spacing.  The posts are driven flush, or till refusal, double wrapped with wire secure, and cut off flush with the top.  Estimating the number of anchors required is more difficult and depends on soil conditions, water table, etc.  Mostly, I want the anchors to prevent the gabions from lifting during high velocity flows, or to prevent them from sliding down the slope - either during construction or after.  I recently used this technique on an emergency spillway which had high velocity flows.  Construction problem occurred when the contractor had difficulty driving the fence posts the full 8' and hit a caliche layer (or rock cobbles).  Most of the posts only were driven 4 - 6'.  Spacing was 3' OC EW.  This corresponds with the 3' nominal dimension of the gabion cells and diaphragms.

 Chuck
 cgopperton@stantec.com
 http://www.stantec.com/
 

RE: Gabion Slope Mattresses

Stakes are utilized only for construction of mattress on slopes steeper than 2:1 and typically are placed 6' on centers. Stakes should not be relyed on for shear resistance to Hydrolic flows. This should be a function of the weight per square foot of Gabions installed.
A #6 rebar 3-4' long and protruding 6" into basket would be enough to hold baskets.

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!


Resources