ABSTRACT
The demand for minimum traffic disruption during bridge rehabilitation or replacement resulted in developing Accelerated Bridge Construction (ABC) methods. One of the approaches that the highway agencies are exploring to further reduce traffic disruption is to build foundation while the existing bridge is in service. Considering the impact of pile installation on the in-service bridge stability, space considerations for equipment deployment and operation, risks associated with construction of specific foundation types, and associated risk mitigation strategies foundations are classified based on the volume of soil displaced during installation (Figure 1). Foundation types highlighted in green are the most preferred for installing near an existing foundation while the bridge is in service. Foundation types highlighted in yellow require consideration based on the distance to the existing bridge foundation due to vibration concerns, reduced confinement of nearby foundations, or expertise needed to assure quality of the installed piles and stability of the in-service bridge. The foundation types highlighted in red are not suitable near the foundations of in-service bridges (Aktan & Attanayake 2015). Sliding bridge and Laser Tracker targets. https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781315207681/cd556cd4-4dcf-4efe-8e29-56fc67b8bfbd/content/fig142_1.tif"/>
