Jetpeler, Injeksjon FV 44 Bussveien

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 were

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.