This project consists of the replacement of four active railroad bridges in the City of San Mateo. Major elements of each bridge are reinforced concrete abutments and wing walls on micropile-supported, cast-in-place footings. The new bridges are assembled adjacent to the existing structures and during each 54-hour shutdown, the existing bridge is lifted out and the newly constructed steel girder bridges raised into place and put into service – all during the shutdown. In order to accommodate the increased height of the new bridge spans, the project requires a four-foot vertical track raise of over 2,000 linear feet of active track. To accomplish the increase of the trackway elevation, over 4,000 linear feet of post and pile retaining wall had to be accomplished prior to installation of the new bridges.
Other work at the site included roadway paving and roadway level concrete flatwork. The work on this project was accomplished in a residential neighborhood requiring monitoring of existing structures for vibration damage as well as coordination with the adjacent residents during materials and equipment deliveries.
|Location:||City of San Mateo|
|Start Date:||August 2014|
|Completion Date:||May 2016|
|Owner:||Peninsula Corridor Joint Powers Board|
|Engineer:||Rail Surveyors & Engineers, Inc. (RSE), Belmont, CA|