Norway - Construction work

Description

The tender documentation is for contract E15, which comprises the Kvitsøy tunnel and a new county road 4692 on Kvitsøy. This is a small part of the E39 Rogfast project that is described below. Rogfast will replace the ferry routes E39 Mortavika -Arsvågen and Mekjarvik – Kvitsøy. E39 Rogfast consists of a 26.7 km submarine main tunnel with separate tunnels for each direction with a cross section of 2 x T10.5 between Harestad in Randaberg Municipality to the south of Boknafjorden and Laupland in Bokn Municipality to the north of Boknafjorden. 2.3 km of motorway is to be constructed with that narrows and connects to the existing E39 at Knarholmen. A 3.5 km tunnel with a cross section of T10.0 is to be constructed between Kvitsøy and the main tunnel, which will be connected to the main tunnel in a two-level interchange in the tunnel. A total of 2.0 km new county road is to be constructed on Kvitsøy. See the website on the Rogfast project, (www.vegvesen.no/Vegprosjekter/Europaveg/E39Rogfast).
Contract E15. The Kvitsøy tunnel is to be built as one tunnel with a cross section of T10.0, approx. 3.5 km. The tunnel is to be driven with a 7 % decline towards the future junction with the Boknafjord tunnel. A 190 m access tunnel T7.5 is to be constructed at the end of the tunnel at contour approx. -230 to the nearest ventilation hall. The contract includes blasting and securing the tunnel, ditch and pipe work, and road construction. Water and frost protection, the technical buildings and other installations will be part of the next contract. Road 22100 is to be constructed on Kvitsøy as a two-lane road with a pavement from pr 100 at Hellesøy for approx. 1650 m, as well as a new junction with the existing county road 4692. The cutting for the tunnel, including ditches, must be blasted and the matter removed. From pr 100 on road 22100 a temporary road is to be constructed to profile 335 on road 18000 in a tunnel. An intermin road past the cutting must also be constructed. Three bridges cast on site are to be constructed with a breadth of 11 m. The bridges have the following lengths:• Bridge Hellesøy, 3 spans, bridge plate 83 m,• Bridge Langøy, one span, bridge plate 20 m,• Bridge Torneskjær, one span, bridge plate 20 m.Geology: there is much uncertainty regarding the geology of the area. There are many zones registered with low, in places extremely low (<3 000 m/2) seismic speeds. Some of the zones are expected to cause problems for driving, securing and injecting the tunnel. One pitched sea filling will be established where the most stone from the tunnel will be placed.

Opportunity closing date

08 March 2021

Value of contract

to be confirmed