Development of a geotechnical GIS for subsurface characterization with three dimensional modeling capabilities.

Details

• Creators:
  Fish, Marc ; Day, Krystle
• Corporate Creators:
  New Hampshire. Dept. of Transportation. Bureau of Materials and Research
• Corporate Contributors:
  United States. Federal Highway Administration
• Subject/TRT Terms:
  • Geographic information systems
  • Data collection
  • Geotechnical engineering
  • Geographic information systems
  • Geospatial data
  • Three-dimensional imaging in geology.
• Publication/ Report Number:
  FHWA-NH-RD-12323V-2
• Resource Type:
  Tech Report
• Geographical Coverage:
  New Hampshire
• Edition:
  Final report.
• Corporate Publisher:
  New Hampshire. Dept. of Transportation. Bureau of Materials and Research
• Abstract:
  The New Hampshire Department of Transportation initiated this research to develop a geographical information system (GIS) that ; visualizes subsurface conditions three dimensionally by pulling together geotechnical data containing spatial references. It incorporates ; several geotechnical projects ranging in size from a fairly small roadway project to a much larger roadway by-pass project. The research ; procedure encompassed taking subsurface data housed on one of the Department’s computer servers and exporting the data as text ; delimited files into a GIS running a 3D modeling extension. A statewide GIS layer was created to access all the available subsurface data ; so existing data in close proximity to new projects could easily be recognized. The GIS utilizes the data to observe the existing ; subsurface conditions three dimensionally. By observing where the least confident data was located, the 3D modeling extension helped to ; determine where and how many additional explorations were needed to adequately map the subsurface conditions to a defined level of ; confidence. For each project, soil and bedrock surfaces were identified and the bedrock surface was exported into a CAD system where ; project cross sections were drawn depicting the bedrock depths along the new roadway centerline. The results of the research indicated ; that a GIS containing existing subsurface data running a 3D modeling extension could adequately map bedrock surface elevations with a ; minimal amount of additional subsurface explorations. It also demonstrates how new and existing soil density and bedrock surface ; elevation data can easily be observed three dimensionally on a computer screen.
  More +
• Format:
  PDF
• Funding:
  12323V, SPR-0004(026)
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/17847/dot_17847_DS1.pdf
• File Type:
  [PDF - 2.71 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:4b271cb7642b3a1339529b7b3899bc8d7116a8f40c36d82fafb66f1f693f727e