Proceedings of DFI of India 2015 Conference, Bengaluru, India, (DFI)
Spil Improvement using Gravel-Sand Columns for a Highway Project in Germany
Stefan, Dr. Schmitz, Jee-Sun, Stephan
Due to the reunion of Western and Eastern Germany in the late 80ís, a multitude of infrastructure projects had to be executed. A good portion of these projects required improvement of the motorway system. In the southern region of Leipzig, in the eastern part of Germany, it was required to connect two existing motorways. Parts of the new motorway pass old strip mining areas. These strip mining areas consist of up to 70m thick backfill material. Especially the upper 20m are very inhomogeneous soil material with a very low bearing capacity. In order to increase the bearing capacity, to decrease the differential settlements and to homogenize the soil parameters, soil improvement using sand-gravel columns was required. Bauer Spezialtiefbau GmbH executed the installation of approx. 711,000 linear meters of columns with a length from 5 m to 25 m. For the project, 11 rigs with frame leads up to 40m were used to install the 43,000 columns with a diameter of 0.8m in 27 weeks.
|article #2194; publication #1015 (India2015)|