Process and Impacts of Soil Compaction John Chapman Program - - PowerPoint PPT Presentation

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Process and Impacts of Soil Compaction John Chapman Program - - PowerPoint PPT Presentation

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Process and Impacts of Soil Compaction John Chapman Program Director Erosion and Stormwater Management Certification Program Bioproducts and Biosystems Engineering Department University of Minnesota chapm155@umn.edu Clean Water Summit

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Process and Impacts of Soil Compaction

John Chapman

Program Director Erosion and Stormwater Management Certification Program Bioproducts and Biosystems Engineering Department University of Minnesota chapm155@umn.edu

Clean Water Summit September 13, 2012

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http://adventuresofacouchsurfer.wordpress.com/tag/dalton-gang/

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Basic Definitions

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Soil Components

  • Voids
  • Solids
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Soil Components

  • Voids
  • Solids
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Soil Components

  • Voids

– Air – Water

  • Solids
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Soil Components

  • Voids

– Water

  • Solids
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Soil Components

  • Voids

– Air – Water

  • Solids

– Particle Size – Gravel, Sand, Silt, Clay – Loam – Organics

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Dry or wet sand?

http://flickr.com/photo/56844661@N00 /4846203074

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Photo from: Dr. Kovacevic, Geotechnical Consulting Group London

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Compaction

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Caterpillar 815F Soil Compactor Wacker Neuson Vibratory Plate Compactor

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Moisture Density Relationship

Moisture Content Soil Density mass/volume

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Moisture Density Relationship

Moisture Content Soil Density mass/volume Optimum Moisture Maximum Density

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Moisture Density Relationship

Moisture Content Soil Density mass/volume

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From: www.extension.umn.edu/distribution/crop systems/dc3115.html

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Soil clods

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From: www.extension.umn.edu/distribution/crop systems/dc3115.html

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Cone Index of Construction Site Soils

  • Rooting Limited at 2000 to 2500 kPa
  • Silty Loam

5000 kPa

  • Sandy Loam at surface

2000 kPa

  • Sandy Loam at 12 inches

3000 kPa

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Thank You