Project

In Desember 2020, a large quick clay landslide occurred in a residential area in Gjerdrum. The landslide had an estimated size of about 1,1 million m3. NVE got the responsibility to secure the landslide area and stabilize the ground for future use. It was decided to use vertical drains to stabilize the remaining clay in the area. Keller was contracted by NVE to execute the works.

Keller installed about 17 500 pcs of vertical drains with a total installation length of about 250 000 m. All drains were installed with Keller's own vertical drain machine. Due to a very low shear strength in the clay, it was necessary to use a water system to be able to anchor the drains in the ground.

Gjerdrum Rasgrop
Gjerdrum Rasgrop