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"Design with Nature"

Techniques to Reduce & Stabilize Impacts

RRT 484Prof. Ed Krumpe

"Design with Nature"

Techniques to Reduce Impact

�Locate use on sites that are both resistant and resilient.

�Control drainage & erosion on the site.�Soil preparation & stabilizers.�Planting to stabilize, screen & direct use.�Eliminate, disperse, & rotate use.�Perform preventive maintenance.

"Design with Nature"

Control drainage & erosion on the site

� Divert, Re-route, & Slow down

� Divert:� Depressions

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"Design with Nature"

Control drainage & erosion on the site

� Divert, Re-route, & Slow down

� Divert:� Depressions� Ditching

"Design with Nature"

Control drainage & erosion on the site

� Divert, Re-route, & Slow down

� Divert:� Depressions� Ditching� Berms

Drain Pipe

"Design with Nature"

Control drainage & erosion on the site

� Divert, Re-route, & Slow down

� Divert:� Depressions� Ditching� Berms� Hydrophitic plantings

Drain Pipe

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"Design with Nature"

Construction Fabrics -- Stabilization for unpaved surfaces

� Separates aggregate from weak soils.

� Confines aggregates by locking bottom layer into a flexible slab.

� Distributes the wheel load over a larger area.

Soil withfabric

Soil withoutfabric

"Design with Nature"

Alternatives to Pavement

� Colored asphalt & concrete.� Pebble-wash asphalt & concrete

(exposed aggregate).� Pavers, cobble stone, corduroy.� Interlocking paver blocks.� Gabions baskets.

"Design with Nature"

AmericanExcelsiorCompany

Tri-Lock

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"Design with Nature"

Gabion Baskets� Light weight until filled

on site with native rock� Interlocked--large inertial

mass� Water & roots penetrate� Long lasting

EmptyBaskets

"Design with Nature"

Retaining Walls

� Deadman anchors� Water but NOT soil permeable

(fabric)� Over design!

"Design with Nature"

Retaining Walls & deadman anchors

� Ecoblocks -- interlocking concrete blocks (3’W x 3’H x 6’L) 3,500 lbs.

� Retaining wall with solid deadman

� Prevents wall from Tilting or Bowing outwardDrain Pipe

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"Design with Nature"

Retaining Walls & Geotextile deadman anchors

� Ecoblocks -- interlocking concrete blocks (3’W x 3’H x 6’L) 3,500 lbs.

� Retaining wall with Geogrid fabric deadman

� Prevents wall from Tilting or Bowing outward

Compacted Gravel

Geogrid fabric

Drain Pipe

"Design with Nature"

Retaining Walls & Geotextile deadman anchors

� Ecoblocks -- interlocking concrete blocks� Geogrid fabric deadmen (End View)

Compacted Gravel

Compacted Gravel

Geogrid fabric

"Design with Nature"

Bank Stabilization

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"Design with Nature"

Two kinds of fiber matting

"Design with Nature"

Rock Riprap and Fiber Matting

"Design with Nature"

Rock wall, matting & plantings

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"Design with Nature"

Log retaining wall with overhang

"Design with Nature"

Natural River

"Design with Nature"

Multiple or Braided Trails

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"Design with Nature"

Naturalized Recovering Trail