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EPS Geofoam 2001, 3rd International Conference, Salt Lake City,December 2001 7 <br /> The L okkeberg bridge is a single lane Acrow steel bridge with a single span of 36,8 m crossing road E6 close to the <br /> Swedish border.The bridge was built in 1989 in order to temporary(3-5 years)improve traffic safety until the <br /> completion of a new motorway between Norway and Sweden. <br /> Due to low bearing capacity and expected large settlements,light weight fill materials(EPS)were considered in the <br /> r s k embankments adjoining the bridge.The project provided <br /> an o ortuni <br /> _ pp ty to place the bridge foundation directly on <br /> :_ V top of the EPS fills(height 4,5 and 5m)on both sides as <br /> an alternative to placing the bridge abutment on piled <br /> foundations.Since the bridge was a temporary solution <br /> and possible deformations could be adjusted during the <br /> period of operation,it was decided to carry out the <br /> project as a full scale test. <br /> v <br /> ., � <br /> �- Three different g� <br /> qualifies of EPS material strep have <br /> ? s been used with design strengths of a=240 kPa in the <br /> �F T = upper layer directly below the bridge abutment,a=180 <br /> kPa in the remaining layers halfway down the fill and 6 <br /> =100 kPa in the bottom half.In the upper layer only 25 <br /> %of the material strength has been utilised while in the <br /> bottom layer the corresponding figure is 60%. <br /> Construction details are shown in longitudinal profiles in- <br /> figures 11 and 12. <br /> Figure 10.Construction of one abutment on the EPS The bridge is today still in operation 12 years after <br /> embankments at Lekkeberg bridge. completion.No signs of cracks or uneven deformation <br /> 36,8 m <br /> €�� Shotcrete <br /> E6 � F <br /> Sand/gravel <br /> M ' <br /> ' � o <br /> I <br /> \\ i a avLIGG FOR B <br /> have been observed.The bridge support has been lifted 30 cm on one side due to subsoil settlements in accordance <br /> with the theoretical calculation. <br /> L okkeberg bridge has provided a good opportunity for monitoring long time performance such as creep and stress <br /> distribution of an EPS embankment. <br /> Long term performance and durability of EPS as a lightweight filling material <br />