The collapse of Skjeggestad bridge What happened? 02/01/2019

The collapse The collapse of Skjeggestad bridge Monday 2nd of February 2015 A quick clay landslide of 80x100 meter occur beneath Skjeggestad bridge on E18 – the main road to south Norway One pylon looses its foundation and moves The bridge deck follows – but the bridge does not collapse entirely 02/01/2019

The bridge The collapse of Skjeggestad bridge Some facts: The bridge was built in 1998 and opened 2002 It was 229 meters long with 2 lanes and was one of two parallell bridges The bridge had 6 spans – maximum span length 39 meters 02/01/2019

The collapse of Skjeggestad bridge The bridge 02/01/2019

The collapse of Skjeggestad bridge The bridge 02/01/2019

The collapse of Skjeggestad bridge Some close ups 02/01/2019

The collapse of Skjeggestad bridge 02/01/2019

The collapse of Skjeggestad bridge Underground details 02/01/2019

Group of experts The collapse of Skjeggestad bridge The day after the collapse we established a fast working group of experts. The questions to be answered was: What do we do now? Safety of the bridge and the traffic Timetable Economy The answer one week later was: Demolition of the damaged bridge. 02/01/2019

Detail: Shear forces after reducing the cross section The collapse of Skjeggestad bridge Detail: Shear forces after reducing the cross section 02.01.2019

Light weight aggregate 02.01.2019

Why did the quick clay collapse? The collapse of Skjeggestad bridge Why did the quick clay collapse? A report from the Norwegian Water Resources and Energy Directorate and the Public roads administration concludes that a stone filling of 3500 m3 probably is the direct cause to the landslide This is still under police investigation. No one is accused for anything. 02/01/2019

Access request The collapse of Skjeggestad bridge In December 2013, VG – the main afternoon newspaper in Norway – asked for access to data in the Norwegian bridge management system Brutus This is not restricted information. We had to give them what they asked for, but we needed time to register the latest inspections and to make a report – We agreed on 9th of February When Skjeggestad bridge collapsed 2nd of February it was increased focus on inspection and condition data in Brutus 02/01/2019

VG 10th of February 2015 The collapse of Skjeggestad bridge Headline: 104 bridges with threatened load capacity 02/01/2019

What do we do now? The collapse of Skjeggestad bridge The parallell bridge opened June 2015 after jet injection of the ground A new bridge is planned opened during 2016 02/01/2019