2018 Soldier pile and lagging temporary excavation support
2018 Micropile tension load test
2018 Micropiles in the abutment
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Location
Cumberland County, PA
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Duration
March 2017 - July 2018
Wagman’s Geotechnical Construction group installed approximately 245 micropiles for foundation support for the EB-103 bridge replacement on the main line of the Pennsylvania Turnpike. These piles were drilled and grouted in a challenging karst environment. They also penetrated reinforced concrete from the existing bridge foundations. Approximately 12 load tests were completed to verify capacity of the micropiles.
Wagman also designed and installed a temporary support of excavation system to support the existing roadway during phased replacement of this bridge. Micropile soldier piles were drilled in and wood lagging was installed.
Key Challenges & Project Details
- In a challenging karst environment, Wagman’s team had to utilize their experience while drilling in the varibale subsurface conditions and employ techniques to control grout loss from the micropiles.
- In the absence of as-built plans of the existing bridge, penetrating existing reinforced concrete foundations with micropiles was challenging. Specifically designed drill tools were used to cut through concrete.