The Third Crossing Bridge

Kingston, Ontario, Canada

In 2020 BAUER Foundations Canada Inc. (BFCA) was contracted by Kiewit to install 44 foundation piles for the Kingston Third Crossing Bridge located on the Cataraqui River that splits Kingston’s historic downtown from the newer developments. BFCA mobilized a BG39 Premium Line rotary drilling rig to drill out the soil material and to install the specified rock socket length for the 44 foundation piles, which ranged in depth between 30 and 54m. The bedrock is Canadian Shield Gneiss with UCS values up to 200–250 MPa, which proved to be a challenging material to extract. Bauer used the roller cone rock coring technique unlike the “down-the hole-hammer” method for rock drilling commonly used in the Ontario region. The selected technique proved to be the right choice. The foundation work was executed from a temporary stone filled causeway and from a trestle bridge section which allowed for water and aquatic vehicle movement during the construction period. Beside the challenging rock coring works for the foundation piles Bauer also executed the temporary guide liners which were installed as setting out points and to enable the installation of the permanent steel casings. The casings were installed with a vibratory hammer and if necessary extended (spliced) to reach stable ground conditions. Concrete installation and integrity testing (CSL) completed the working scope.