YIELDING SEAM MULTI-PLATE PIPE

This report consists of data acquired from observation of a project designed to carry the water of Rock Creek through a rock fill embankment by using two 7-gage, 168 inch diameter multi-plate pipes, 328 and 319 feet in length, of the "Koyhole Slotted" type supporting approximately 80 feet of fill. Data from the earth pressure cells indicate pressure increased as the embankment was placed on all gages with some reduction since completion. The Settlement platforms above and below the pipe are both inoperative; each indicated about four inches of settlement before failing. Measurements inside the pipe showed that the bolts had slipped into the slots during embankment construction. Joint slippage along the sides was about double the slippage at the top. The side points reached their limit of one inch total movement. Bolts along the sides are in bearing and have canted about 10 degrees from normal. No overstressing of the plates is visible. Joint slippage in areas with less than maximum fill height is noticeably less. No further readings of the strain gages and settlement platforms are possible due to vandalism. It is estimated that the contractor saved about 20 percent in materials costs and 30 percent in erecting costs in comparison to conventional multiplate installation.

• Corporate Authors:

  Idaho Transportation Department

  3311 W State Street, P. O. Box 7129
  Boise, ID  United States  83707-1129
• Authors:
  • Merritt, W E
  • VAN OVER, L E
• Publication Date: 1980-8

Media Info

• Features: Appendices; Figures; Tables;
• Pagination: v.p.

Subject/Index Terms

• TRT Terms: Bearing capacity; Bolts; Costs; Data collection; Earth pressure; Embankments; Failure; Ground settlement; Joints; Pipe; Plate metal; Rockfills; Strain gages; Stresses
• Uncontrolled Terms: Slippage
• Old TRIS Terms: Joint
• Subject Areas: Bridges and other structures; Finance; Highways; I26: Water Run-off - Freeze-thaw;

Filing Info

• Accession Number: 00329507
• Record Type: Publication
• Report/Paper Numbers: Proj 78-01-02 Intl Rpt.
• Files: TRIS, STATEDOT
• Created Date: May 21 1981 12:00AM