Concrete Cloth

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

[email protected]