Reconstruction Daniel Boone Bridge with TenCate Mirafi® H2RI
A new bridge rises up where the I-64 highway in St Louis crosses the Missouri. Because of the soil conditions and the groundwater level under the roadways to and from the bridge, the Missouri Department of Transportation insisted on an innovative construction solution. This was found in the application of TenCate Mirafi® H2Ri.
Daniel Boone Bridge - the former situation
The Daniel Boone Bridge in western St Louis, Missouri (United States), dates back to the 1930s. Now nearly 80 years old, the bridge was not designed to cope with today’s volume of traffic. Regular preventative maintenance is necessary, which causes congestion and safety concerns for highway workers. In addition, the current westbound bridge has three narrow lanes, which often become congested during peak travel times. It was therefore decided on expansion, with a bridge on the eastern side for not only cars but also cyclists and pedestrians.
Because of saturated soil conditions, water had to be removed from under the pavement section at the bridge approaches. The civil engineer in charge therefore decided to utilise the possibilities offered by the TenCate Mirafi® H2Ri high-strength wicking geosynthetic. The new bridge is being built upstream from the two existing bridges. Once it is complete, eastbound traffic will use the new bridge, and westbound traffic will be shifted to what is currently the eastbound bridge.
Installation of TenCate Mirafi®
Building work on the third, eastbound bridge began in 2013. At the same time, construction work began on a new Chesterfield Airport Road bridge and a connecting road. Both were completed in 2014. In the middle of 2015, the new bridge was opened to eastbound traffic. Afterwards work began on rehabilitating the old eastbound bridge, which will be opened later this year to westbound traffic.
In the first instance, some 6,000 m2 of TenCate Mirafi® H2Ri were installed; later another 68,000 m2. A downpour after the installation immediately demonstrated the value of the material.
At the beginning of 2016, several connecting access and exit roads will be ready, as well as the cycle and pedestrian path on the new bridge. Subsequently, the old westbound bridge will be dismantled.