OLD TWON- MUD INLET BRIDGE, REHABILITATION OF A TIMBER STRUCTURE WITH TIRE SHREDS

In the Spring of 2002 the Maine Department of Transportation completed rehabilitation of the Mud Pond Inlet Bridge. The project consisted of raising the grade of a timber structure with tire shreds. The bridge is located on the only route to the East Shore of Pushaw Lake, where 50 families reside year-round. The bridge over-topped with 600 mm of water during the Spring runoff. The design consisted of raising the grade at the driving surface using 600 mm of tire shreds. Compression test results were used to determine a tire shred unit weight after construction of 0.76 Mg/m(3) and the required amount of overbuild of 60 mm. At-rest earth conditions and equivalent fluid pressure methods were used to design a permanent, timber lagging retaining system. Stage-construction plans utilized a temporary, geotextile wrap wall, designed using active earth pressure conditions. The $1.3 million final cost saved 87% over replacement alternatives.

Language

  • English

Media Info

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Filing Info

  • Accession Number: 00987966
  • Record Type: Publication
  • ISBN: 0784407444
  • Report/Paper Numbers: Volume I
  • Files: TRIS
  • Created Date: Mar 24 2005 12:00AM