Tunnel Load Rating Examples: A Supplement to the Reference Guide for Load Rating of Tunnel Structures

This supplement to the FHWA Reference Guide for Load Rating of Tunnel Structures (Guide) presents two practical examples of real, in-service tunnel structures. The examples are based on the information contained within the Guide, and computations are presented in similar details as the load rating examples included in the Guide. The ratings are provided for Load and Resistance Factor Rating (LRFR) only. The examples are rated for the HL-93 and emergency vehicle (EV) vehicles. Additionally, a nominal permit load is applied and rated. For each example, one cross-section with one set of parameters (e.g. dead loads, soil parameters, etc.) is rated. Repetitive hand calculations are shown once in detail (equations) with the subsequent results summarized in tables. Elements from the original drawings and inspection reports (where applicable) are used in the examples where legible and useful. Supplemental sketches are developed as necessary in a similar style as the Guide. Where actual dimensions or properties are unclear or unavailable, reasonable approximations are made. The results of the two examples may be used to validate the load ratings in the records of the tunnels.

• Record URL:
  https://rosap.ntl.bts.gov/view/dot/56219
• Corporate Authors:

  HDR Engineering

  Pittsburg, PA  United States 

  Earth Mechanics, Inc.

  ,    

  Federal Highway Administration

  Office of Bridges and Structures
  1200 New Jersey Avenue, SE
  Washington, DC  United States 
• Authors:
  • Frankl, Bernard
  • Leshko, Brian
  • Ream, Anthony
  • Wilson, Patrick
• Publication Date: 2020-12

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures; References; Tables;
• Pagination: 116p

Subject/Index Terms

• TRT Terms: Case studies; Emergency vehicles; Girders; Load and resistance factor design; Load factor; Tunnel lining; Tunnels
• Subject Areas: Bridges and other structures; Design; Highways;

Filing Info

• Accession Number: 01776528
• Record Type: Publication
• Report/Paper Numbers: FHWA-HIF-20-058
• Contract Numbers: DTFH6114D00049
• Files: NTL, TRIS, ATRI, USDOT
• Created Date: Jul 14 2021 1:43PM