TH 212/CR 110 Bridge Foundation Monitoring

A freeway bridge on the Trunk Highway 212 Design-Build Project was to be pile-supported, but was re-designed using spread footing abutment foundations for a significantly more efficient and economical foundation system.

AET performed seismic cone penetration testing and analyzed the data to determine settlement potential and the feasibility of spread foundations. AET recommended that preload embankments be placed to reduce long-term settlements to tolerable amounts. AET worked with the design-build team and the Minnesota Department of Transportation to develop an instrumentation program, which monitored bridge performance during construction for comparison with the predicted foundation response.

The instrumentation not only provided information on the acceptable performance of the foundations but also justification for future use of spread footings for highway bridge support.

 

Customer Name:	ZRC for Minnesota Dept. of Transportation
Dates of Performance:	2005 to 2008
Value:	Total Construction cost - $240 million.                                                AET fees for bridge - $ 7,500.
Location:	Chaska, Minnesota
Contact Reference:	Mr. Robert Mateega; HDR, Inc Bridge Engineer (763) 591-5400,