Jåttåvågen

Design
The terrain in the area must be lowered to make room for
new road course. This leads to challenges related to
the groundwater. Both water leakage into the construction pit,
as well as groundwater lowering in the adjacent residential area
must be avoided. For this, a coherent
jet pile wall is established where the excavation was in
loose masses, and correspondingly a screen injection there
the excavation was in the mountains.

Execution
The jet piles were made as a single row of piles with
diameter 2000mm and center distance of 1.5m. High
standard of execution ensures good overlap, uniform
piles, and a continuous waterproofing
jet pile wall.

For injection, strategic ones were first carried out
water loss measurements. Based on these results,
the defined injection parameters. Berghull became
drilled with a center distance of 1 meter and injection
was carried out in stages and in 2 rounds, with primary and
secondary injection.