Louis-Hippolyte-La Fontaine Tunnel Refurbishment- Enhancement of the Tunnel Fire Safety

Abstract

The Louis-Hippolyte-La Fontaine Tunnel, a critical 1.4-km immersed tube connecting Montreal and Longueuil beneath the St. Lawrence River, has undergone extensive refurbishment to prolong its service life by 40 years and align with rigorous international safety standards.

This paper presents key insights from large-scale fire tests conducted by the CERIB laboratory in France, which were carried out in accordance with the modified hydrocarbon time-temperature fire curve. Supplementary tests validated the Aestuver Tx boards' durability in harsh winter conditions. This collaborative effort among the tunnel operator, contractor, CERIB, and material supplier exemplifies a comprehensive approach to delivering resilient infrastructure capable of withstanding extreme fire events. The paper details project specifications, testing methodologies, results, and conclusions.