Telejaen river, Romania case study
The area around the North of Bucharest is heavily industrialised with oil extraction and preparation facilities. Therefore the railway network is well developed in the region, since the oil needs to be transported from here across the country. Teleajen is a small tributary of the Prahova river, that flows east of Ploiesti and crosses the railway from Buzau to Ploiesti, which is part of the IX European Corridor. The railway bridge was built decades ago, and, this important crossing bridge has seen better days. The Teleajen river usually has a flow of around 343 m³/sec, but in case of heavy rainfalls the value increases significantly. In 2005 the river reached a maximum flow of 582 m³/sec. This caused serious erosion of the river bed and dramatically changed the initial river course in the vicinity of the bridge. After the flood, the river flowed very close to one of the abutments of the railway bridge, eroding its foundation. The authorities decided to undertake protection measures, and the technical solution finally adopted was to construct a bank protection, parallel to the river course for a distance of about 100 metres upstream and downstream of the affected abutment.
The company selected to execute the protection works was HF Wiebe Romania, a major railway contractor. As in other cases, there was no stone available close to the site to build the protection, so the designers adopted the use of the well known Secutex 'C' and 'E' sandcontainers from NAUE, filled with soil material available on site. Over 900 sandbags type 'C' and 300 type 'E' were used. A ditch was excavated along the river bed, upstream and downstream of the bridge abutment, then the sandbags were laid down one by one, using an excavator and lifting straps. The sandbags were filled up using a metal funnel built on site and an excavator. The sewing was done by 2 operators, using a portable sewing machine.
Once positioned in the ditch, the sandbags were hammered with the back of the excavator bucket, in such a way that the filling material inside was evenly spread in the container. Due to the exceptional strength and robustness of the Secutex sandcontainers, the hammering did not cause any damage and allowed them to be well positioned. On top of the first layer of sandbags a second layer was placed until the required height of the protection was achieved. The total construction time was about 4 weeks, including the filling and the sewing of the sandbags.
Year of construction: 2006
City / Country: Bucharest, Romania
Secutex Sandcontainer, type C 900sqm