Geosynthetic Reinforced Soil

Earthworks and Foundations – Walls and Slopes

Construction of a road bridge at Ullerslev/ Reinforced soil abutments with Fortrac®

Situation Danish State Railways (DSB) opted for reinforced soil abutments, when the road bridge was built over the -Fredericia main railway line on the island of . Due to the subsoil for this bridge at Ullerslev being glacial clay, considerable settlements of the soil was reinforced with a geogrid Fortrac® 110/30-20 abutment had to be accommodated. The conventional at a spacing af 50 cm for each layer, which enabled pile foundation was ruled out for financial reasons, the construction of an abutment with a frontal and instead, the DSB chose a flexible supporting inclination of 81°, almost vertical. structure of earth and geogrids. Fortrac® 110/30-20 is a flexible geogrid made by The road bridge, with a span of 15.5 m, consists of an HUESKER Synthetic, having a short term tensile 11 m wide steel structure resting on 8 m high strength of 110 kN/m in the longitudinal direction. abutments. Each abutment has to carry 2000 kN of Fortrac® is manufactured from high modulus polyester dead weight and 1700 kN of traffic loading. in a range of strengths. It carries a “British Board of Agrément” Certificate, in which the design principles Solution are detailed. A gravel-sand compacted to a Proctor density of 100% The contractor, Jørgensen & Søn A/S of / was employed as fill material for the abutments. The Denmark, built the abutments between December, Internet: www. +49(0)2542/701-499 E-mail: info@ Fax: +49(0) 2542/701-0 Phone: D-48712 Gescher, Germany Fabrikstraße 13-15 HUESKER Synthetic GmbH HUESKER.com HUESKER.de Geosynthetic Reinforced Soil Earthworks andFoundations –Walls andSlopes Fortrac reinforced soilapproach hasproved itself! and financialaspects, was positive. Once againthe DSB’s reaction to thisproject, inbothtechnical settled approx. 2mm. reinforced soilabutments hadthemselves only the erection ofthebridgesuperstructure. The 40-50 mm,ofwhichapprox. 10mmoccurred after summer of1993thesettlements amounted to max. deformations are caused bythesubsoil.Upto the The results show thatalmost alloftheabutment facings have beenmeasured in40measuringpoints. Since Dezember1991thedeformations oftheabutment in August, 1992. 1991 andJanuray, 1992.Thebridgeitself was erected ® isaregistered of HUESKERSynthetic trademark GmbH.

03/13 B Copyright by HUESKER Synthetic GmbH, Gescher