Silt Fence Installation
Kody R. Featherston
Candice L. Johnson
J. Kent Evatt
Monica L. Johnston
BAE 4022 – Spring 2004
BAE 4022 – Spring 2004 K. Featherston, C. Johnson, M. Johnston, J.K. Evatt
WHAT IS SILT FENCE?
• A silt fence is a temporary sediment barrier consisting of filter fabric entrenched into the
soil and attached to supporting posts.
BAE 4022 – Spring 2004 K. Featherston, C. Johnson, M. Johnston, J.K. Evatt
PROBLEM DEFINITION
• Common failures are caused by:
– Improper Installation
– Incorrect Location
– Inadequate Strength
BAE 4022 – Spring 2004 K. Featherston, C. Johnson, M. Johnston, J.K. Evatt
FAESF
• Failure Avoidance and Effective Silt Fence Technology
– control undercutting and overtopping
– control lateral flow along the silt fence
– improve the trapping of fine silts and clays
– provide adequate strength posts and fence
– provide for adequate bearing capacity of post footings
BAE 4022 – Spring 2004 K. Featherston, C. Johnson, M. Johnston, J.K. Evatt
STATEMENT OF WORK
• Enviro-Mech will focus on reducing failure due to improper installation.
• Dr. Barfield’s team will continue developing a new filter fence material configuration and support mechanism.
• Enviro-Mech will design and build a machine which will create a trench, lay the fence, and backfill the trench.
BAE 4022 – Spring 2004 K. Featherston, C. Johnson, M. Johnston, J.K. Evatt
INVESTIGATION
• Recommended Silt Fence Practices
• Current Equipment Patented and in Production
• Similar Vibratory Plow Applications
BAE 4022 – Spring 2004 K. Featherston, C. Johnson, M. Johnston, J.K. Evatt
RECOMMENDED PRACTICES
• Information Concerns
– Trench Dimensions
– Fence Location
– Post Height
– Fence Size
BAE 4022 – Spring 2004 K. Featherston, C. Johnson, M. Johnston, J.K. Evatt
CURRENT EQUIPMENT
• Tommy Silt Fence Machine
• Erosion Runner
• ImpleMax SF12c
• McCormick Equipment
BAE 4022 – Spring 2004 K. Featherston, C. Johnson, M. Johnston, J.K. Evatt
VIBRATORY PLOW
• Cable Installation Blades
– Integrated Slot
– Four Bar Linkage
Groove
on Back
Edge of
Blade
Cable
Guide
Hook to
Secure
Guide
Upper
Latch
BAE 4022 – Spring 2004 K. Featherston, C. Johnson, M. Johnston, J.K. Evatt
CONCEPT DEVELOPMENT
• Design Criteria
– FAESF Research Group
– Charles Machine Works
• Potential Solutions
– Proposal A - Two-Disk Method
– Proposal B - Feed Channel Method
– Proposal C - Tension Rod Method
BAE 4022 – Spring 2004 K. Featherston, C. Johnson, M. Johnston, J.K. Evatt
DESIGN CRITERIA
• FAESF Proposed Design
BAE 4022 – Spring 2004 K. Featherston, C. Johnson, M. Johnston, J.K. Evatt
DESIGN CRITERIA
• Design compatible with current power source provided by Charles Machine Works
• Economical
• Marketable
• Safe
BAE 4022 – Spring 2004 K. Featherston, C. Johnson, M. Johnston, J.K. Evatt
INSTALLATION METHODS
• Proposal A - Two-Disk Method
• Proposal B - Feed Channel Method
• Proposal C - Tension Rod Method
BAE 4022 – Spring 2004 K. Featherston, C. Johnson, M. Johnston, J.K. Evatt
PROPOSAL ATWO-DISK METHOD
• Two narrow disks pinch the fabric.
• The disks feed the fabric into the slot.
• Fabric is released at the bottom of the slot.
BAE 4022 – Spring 2004 K. Featherston, C. Johnson, M. Johnston, J.K. Evatt
PROPOSAL BFEED CHANNEL METHOD
• Channel will be attached similar to four-bar linkage currently used.
• The fence will require added bulk to bottom edge.
BAE 4022 – Spring 2004 K. Featherston, C. Johnson, M. Johnston, J.K. Evatt
PROPOSAL CTENSION ROD METHOD
• Spring loaded rod will guide material through slot.
• The end of the rod acts as a pressure point.
BAE 4022 – Spring 2004 K. Featherston, C. Johnson, M. Johnston, J.K. Evatt
TEST AND ANALYSIS
• Testing was required to determine the most effective and financially feasible solution.
– Methods Testing
– Concept Testing
– Final Design Testing
BAE 4022 – Spring 2004 K. Featherston, C. Johnson, M. Johnston, J.K. Evatt
CONCEPT TESTING
• Max lift capacity of machine
• Extensions and Tubular Frame to attach test components
BAE 4022 – Spring 2004 K. Featherston, C. Johnson, M. Johnston, J.K. Evatt
LOAD DATA
0
25
50
75
100
125
0 5 10 15 20 25
Time (sec)
Fo
rce
(lb
s)
BAE 4022 – Spring 2004 K. Featherston, C. Johnson, M. Johnston, J.K. Evatt
FRAME DESIGN
• Parallel Frame Rails
• Over the Top
• Wrap Around
BAE 4022 – Spring 2004 K. Featherston, C. Johnson, M. Johnston, J.K. Evatt
FINAL DESIGN TESTING
• Issues Discovered
– Soil Packing Against Tension Rod Inside Shield
– Wind Unrolling Fabric Faster than Installed
BAE 4022 – Spring 2004 K. Featherston, C. Johnson, M. Johnston, J.K. Evatt
FINAL DESIGN TESTING
• Forces for removal measured
SoilCondition
Force (lb)
Bare, Unpacked 15
Bare, Packed 50
Grass, Unpacked 40
Grass, Packed > 50
BAE 4022 – Spring 2004 K. Featherston, C. Johnson, M. Johnston, J.K. Evatt
FINAL DESIGN TESTING
• Surfaces
– Grass
– Bare Soil
• Paths
– Straight
– Curved
BAE 4022 – Spring 2004 K. Featherston, C. Johnson, M. Johnston, J.K. Evatt
FINAL DESIGN
• Frame
– Main Frame
– Sub Frame
• Components
– Shield
– Tension Rod
– Fabric Tension Arm
– Packing Wheels
BAE 4022 – Spring 2004 K. Featherston, C. Johnson, M. Johnston, J.K. Evatt
SAFETY
• Rounded Corners
• Clearly Labeled Pinch Points
• Spring Pins
BAE 4022 – Spring 2004 K. Featherston, C. Johnson, M. Johnston, J.K. Evatt
MANUALS
• Operators Manual
• Parts Manual
BAE 4022 – Spring 2004 K. Featherston, C. Johnson, M. Johnston, J.K. Evatt
PROJECT SCHEDULE
Fall Semester Accomplishments
BAE 4022 – Spring 2004 K. Featherston, C. Johnson, M. Johnston, J.K. Evatt
PROJECT SCHEDULE
Spring Semester Accomplishments
BAE 4022 – Spring 2004 K. Featherston, C. Johnson, M. Johnston, J.K. Evatt
PROTOTYPE EXPENSES
$304
$204
Fabrication Cost
$689
$744
Total Cost
$540Projected Budget
$385 Actual
Cost
Material Cost
$55 Under Budget
BAE 4022 – Spring 2004 K. Featherston, C. Johnson, M. Johnston, J.K. Evatt
ESTIMATED MANUFACTUING COST
Direct Material
Labor and Overhead
Total
OSU Silt Fence
Installer
$110 $350 $460
BAE 4022 – Spring 2004 K. Featherston, C. Johnson, M. Johnston, J.K. Evatt
COMPETITIVECOMPARISON
$7177Tommy Silt Fence Machine
$6400OSU Silt Fence Installer
and Vibratory Plow
$11795ImpleMax SF12c
$4925McCormick Silt Fence Installer
Retail Price
Estimated Retail of $1150
BAE 4022 – Spring 2004 K. Featherston, C. Johnson, M. Johnston, J.K. Evatt
THANK YOU
• Richard Sharp -Project Engineer
• Kelvin Self -Manager R & D
• Dr. Billy Barfield -FAESF Research Group
• Dr. Ellen Stevens -FAESF Research Group
• Wayne Kiner -BAE Laboratory Manager
• Dr. Paul Weckler -Senior Design Instructor
• Dr. Ron Elliot -BAE Department Head
Enviro-Mech would like
to thank those who have
contributed to our Senior
Design Project.
Top Related