Performance Evaluation of Longitudinal Pipe Underdrains

This research was conducted under four study phases. Phase 1 involved a full scale laboratory study to evaluate three different underdrain pipe and envelope systems. It was found that an open graded FA-4 envelope material without a geotextile wrapped pipe was a viable design option. In Phase 2 a study was conducted to relate the pipe slot size to the envelope gradation. A testing procedure was developed. A 2 mm pipe slot prevented FA-4 envelope material from passing into the pipe. In Phase 3 it was found that a modified FA-4 material with control of the 0.075 mm aterial could be produced which would have an acceptable saturated hydraulic conductivity value for good subdrainage performance. The study in Phase 4 was inconclusive in terms of selecting geotextiles that would not clog in subdrainage applications. Neither the Gradient Ratio Test nor the Hydraulic Conductivity Ratio Test identified conclusively whether soilgeotextile combinations would clog in the field.

• Record URL:
  • http://www.ict.uiuc.edu/Publications/report%20files/TES-135.pdf
• 
• Record URL:
  • https://rosap.ntl.bts.gov/view/dot/39378
• Corporate Authors:

  University of Illinois, Urbana-Champaign

  Department of Civil and Environmental Engineering
  205 North Mathews Avenue
  Urbana, IL  United States  61801-2352

  Illinois Department of Transportation

  Bureau of Materials and Physical Research
  126 East Ash Street
  Springfield, IL  United States  62704-4766

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Stein, Jeffrey S
  • Dempsey, Barry J
• Publication Date: 2004-11

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures; Photos; References; Tables;
• Pagination: 38p

Subject/Index Terms

• TRT Terms: Drain pipe; Drainage coefficient (Pavements); Drainage structures; Edge drains; Filters; Geotextiles; Subsurface drainage; Test procedures
• Uncontrolled Terms: Drainage capacity
• Subject Areas: Geotechnology; Highways; Hydraulics and Hydrology; I26: Water Run-off - Freeze-thaw;

Filing Info

• Accession Number: 01108646
• Record Type: Publication
• Contract Numbers: IHR-R25
• Files: NTL, TRIS, USDOT, STATEDOT
• Created Date: Aug 20 2008 9:06AM