DESIGN OF ROADSIDE CHANNELS WITH FLEXIBLE LININGS

Flexible linings provide a means of stabilizing roadside channels. Flexible linings are able to conform to changes in channel shape while maintaining the overall lining integrity. Permanent flexible lining such as riprap, gravel, or vegetation reinforced with synthetic mat are suitable for hydraulic conditions similar to those requiring rigid linings. Vegetation or temporary linings are suited to hydraulic condition where uniform flow exists and shear stresses are moderate. Design procedures are given for rock riprap, wire-enclosed riprap, gravel riprap, woven paper net, jute net, fiberglass roving, curled wood mat, synthetic mat, and straw with net. Special design procedures are presented for composite channels and channels with steep gradients. The design procedures are based on the concept of maximum permissible tractive force. Methods for determination of hydraulic resistance and permissible shear stress for individual linings are presented. Nomographs are provided for solution of uniform flow conditions in trapezoidal channels. Nomographs are also provided for determination of resistance characteristics for vegetation and permissible shear stress for soils.

• Record URL:
  • http://www.fhwa.dot.gov/engineering/hydraulics/pubs/hec/hec15si.pdf
• 
• Corporate Authors:

  Simons, Li and Associates, Incorporated

  3555 Stanford Road, P.O. Box 1816
  Fort Collins, CO  United States  80522

  Federal Highway Administration

  Turner-Fairbank Highway Research Center, 6300 Georgetown Pike
  McLean, VA  United States  22101
• Authors:
  • Chen, Y H
  • Cotton, G K
• Publication Date: 1988-4

Media Info

• Edition: Final Report
• Features: Appendices; Figures; Glossary; References; Tables;
• Pagination: 150p

Subject/Index Terms

• TRT Terms: Channel linings; Design; Design methods; Ditches; Fiberglass; Flexibility; Gravel; Hydraulics; Linings; Nomographs; Riprap; Shear stress; Straw; Synthetic fibers; Tractive forces; Vegetation
• Uncontrolled Terms: Rovings (Fiber bundles); Temporary
• Old TRIS Terms: Curled wood mat; Flexible linings; Jute mat; Uniform flow; Woven paper net
• Subject Areas: Design; Highways; Hydraulics and Hydrology; Marine Transportation; I26: Water Run-off - Freeze-thaw;

Filing Info

• Accession Number: 00469231
• Record Type: Publication
• Source Agency: Federal Highway Administration
• Report/Paper Numbers: FHWA-IP-87-7, HEC #15, FCP 35ZH078
• Contract Numbers: DTFH61-84-C-00055
• Files: TRIS, ATRI, USDOT
• Created Date: Jun 30 1988 12:00AM