Transcript
Slope Armoring for Pond(Jan. 17, 2017
By Kurt S Chirbas, PE CPESC
Milliken Infrastructure
Pond slope failing
Detail Designs
Detail Designs
Detail Designs
The general pullout strength of percussion anchors in the fields:
A) TLA -2 ( 400 lbs peak) and average around 250-300 lbs
B) TLA-3 ( 600 lbs peak) and average around 300 -400 lbs
*however we notice that the anchors still had a slight movement
during the load measurements which means over time the loads could
potentially decrease
Determining anchor pullout in field
Percussion anchor spacing
Given the field pullout information, we recommendedusing the TLA-3
anchors and not the previous suggested TLA -2 and changing the
anchor spacing from 6 foot intervals to 5 foot intervals on all overlaps
and offset center panel anchors from 3 ft. to 2.5 ft. That equates to 2
anchor for every 17.5 sq.ft. (or 1 anchor for every 8.75 sq.ft.) of
surface area plus additional anchors in the anchor trench (top and
bottom at every overlap). The original spacing equated to 2 anchor
for every 21 sq.ft. of surface area (or 1 anchor for every 10.5 sq.ft.).
The recommend minimum anchor depth completely installed after
loading is 5 ft. depth to ensure long term load capacity.
Reconstructing Slope and installing anchor trench before deploying Concrete
Cloth)
Deploying Concrete Cloth
Deployment of Concrete Cloth
Installing Percussion Anchors
Installation in Progress
Installation Completed
Thank You
Kurt Chirbas, PE CPESC
(916) 215-3163 cell
(916) 772-6211 office
Kurt.Chirbas@Milliken.com
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