Instrumentation Plan for Monitoring the New I-10 Twin Span Bridge

The new I-10 Twin Span Bridge over Lake Pontchartrain is being constructed to replace the existing bridge, which was damaged by Hurricane Katrina in 2005. The new bridge was designed to be higher and stronger than the existing bridge. The new bridge will be supported by groups of battered pile foundations. The Louisiana Department of Transportation and Development (LADOTD) decided to install a substructure and superstructure health monitoring system on a selected bridge pier (M19 eastbound) at the main span for short-term and long-term monitoring of the bridge. The substructure instrumentation for the M19 eastbound pier includes strain gauges and In-Place Inclinometers (IPI) installed inside the piles, and triaxial accelerometers, water pressure cells, tiltmeters, and corrosion meters installed on the pile cap. A lateral load test was designed and conducted to evaluate the validity of the analysis method used to design the battered pile foundations. Horizontal movements of the pier caps and bents were monitored using an automated survey station with prisms. This paper will discuss the substructure instrumentation plan and the novel approaches to preparation and the design of lateral load testing of battered pile-group foundation.

Language

  • English

Media Info

  • Media Type: DVD
  • Features: Figures; References;
  • Pagination: 9p
  • Monograph Title: TRB 89th Annual Meeting Compendium of Papers DVD

Subject/Index Terms

Filing Info

  • Accession Number: 01155706
  • Record Type: Publication
  • Report/Paper Numbers: 10-1564
  • Files: BTRIS, TRIS, TRB
  • Created Date: Jan 25 2010 10:41AM