The Colquitz River Bridge Installation Lift Plan, developed by Arch Engineers Ltd., involved a complex lift operation for a two-span bridge in an urban environment. The project faced unique challenges, such as obstructions from utilities, overhead hydro lines, and high-tension wires. These constraints demanded careful planning and precise execution to ensure the safe placement of the bridge girders.
The client selected rubber-tired hydraulic boom mobile cranes for the lift. Arch positioned the cranes on mats over the roadway to create a stable base. The girders were delivered by truck, and the installation was closely coordinated with the traffic management plan and delivery schedule. The staged process included splicing and cantilevering one pair of girders over the mid-span pier, then swinging the third girder into place for a mid-lift splice.
Safety remained a priority throughout the project. Arch developed a detailed safety plan and designed custom lifting lugs to ensure precise girder placement. These lugs stabilized the girders and maintained accurate alignment during the lift.
This project demanded advanced engineering and careful coordination. Arch Engineers overcame urban constraints through disciplined planning and rigorous safety standards. The Colquitz River Bridge project highlights Arch’s expertise in delivering safe, precise solutions for challenging infrastructure lifts.