STAGE 2

The port expansion comprises amongst others of new outer breakwater, quay facilities, dredging, ship ramp and skidding area.

Stage 2 is expected to be finished by fall 2019.

 

STAGE 2


Approximately 930 m new northern outer breakwater will be established. Rocks for the construction of the new breakwater will be reused from the decomposition of the existing north breakwater from the opening to the North Harbour and from part of the northern outer breakwater from stage 1 and from the deposit fields, which are surrounded by the new northern outer breakwater. Supplementing new rocks from Norwegian and Swedish quarries will be delivered by ship and barge. The new outer breakwater will be connected to the north breakwater from the port expansion, stage 1.

The navigation channel and the harbour basin will be dredged additionally to 14 m water depth, corresponding to approximately 1.5 million m³ deepening material, of which nearly 1.1 million m³ of the deepening material will be used for the establishment of approximately 170,000 m² new hinterland area behind the new outer breakwater.

A new 400 m quay facility with 14 m water depth will be established. The quay stretch is amongst others designed for scrapping of offshore installations and ships with i.e. a new large ship ramp and a new skidding area for placement of offshore platforms.

Approximately 150,000 m² will be established with plastic membrane protected beneath the surface, which ensures that surface water will be lead to an on-site filter and purification plant for the cleaning of possible contaminating particles.

The access road to the port expansion will be by Sandholm and via the new access road from Nordhavnsvej.

 

NORTH BREAKWATER

The new outer breakwater will be approximately 930 m long.
It will be constructed as a traditional rock toss breakwater, according to below cross-section of the north breakwater:

 

CROSS-SECTION OF NORTH BREAKWATER:

 

 

QUAY

The future quay will be 400 m long. Along the quay, the water depth will be extended to 14 m.

The quay will consist of steel sheet piling, which by means of anchor bolts will be tethered to the anchor plates situated 20-45 m inside the hinterland. The quay sheet piling will be finished off with a quay wall of armoured concrete.

 

CROSS-SECTION OF 400 M QUAY:

 

Bollards and fender systems will be installed on the quay wall for loading and unloading of ships alongside quay.
 
An emergency ladder will be installed by each fender.

The quay area will be established with a surface consisting of hard compressed crushed rock material with a thickness between 500mm to 1,100mm.

The quay area will be lightened by high street lamps with LED fixtures, and for supply electric panels and water taps will be established.

On the quay area a plastic membrane will be laid out, protected beneath the surface, which will ensure that surface water will be lead through line drains to an on-site filter and purification plant, for the cleaning of possible contaminating particles.

 

SHIP RAMP

By the new 400 m quay, a 90 m wide and 110 m long ramp will be established for the hauling of ships.

The ramp will be constructed with a directly founded deck in armoured concrete, strengthened in the core where the load from the ships will be largest. Steel profiles will be moulded into the top of the concrete deck to protect the concrete against wear, when the ships are pulled up the ramp.

The ramp will be established from level -4.65 m by the quay edge,  and will be lead to terrain with facility 1:15 (approximately 4 degrees).

 

CROSS-SECTION OF SHIP RAMP:

 

 

The walls of the ramp will be constructed as the quay of steel sheet piling, which by means anchor bolts will be tethered to the anchor plates in the hinterland.

 

CROSS-SECTION OF WING WALL AT SHIP RAMP:

 

SKIDDING AREA

On part of the 600 m quay (stage 1 of the port expansion) a 90m wide and 140 m long skidding area will be established for taking ashore offshore installations (platforms, etc.) of up to a weight of 50,000 ton.

Behind the capping beam an extremely strong relief slab, approximately 10 m wide, will be constructed. The relief slab will be made of armoured concrete and founded on approximately 300 horizontal steel piles. Behind the relief slab approximately 2,000 concrete piles with pile hats are established. The relief slab and the approximately 2,000 concrete piles with pile hats will ensure that during skidding operations, there will be no unacceptable sentence damages and will relieve the quay piling of the extreme surface sentence.

Further into the hinterland, a large pile grid will be constructed of strong concrete piles with pile hats on top, to withhold loads from the area and to ensure that unacceptable sentences are avoided.

 

CROSS-SECTION OF SKIDDING AREA:

 

 

DEEPENING AND FILLING UP

In stage 2 the harbour and the turning basin will be dredged additionally to 14 m water depth. The navigation channel will also be dredged to 14 m in a width of 100 m.

The majority of the material dredged will be used for the filling up of the hinterland area. Non-reusable clay material will be sailed by barge to an offshore deposit field.

The filled up hinterland area will cover an area of approximately 170,000 m². Nearly 1.1 million m³ dredged material from the navigation channel and the harbour basin will be used for filling up. Dredged material will be pumped through a pipes into the hinterland area.

Potentially contaminated sediment located within the prior northern outer breakwater will be dug up and taken to existing deposit fields.
 

 

 

STAGE 1

August 26, 2015 the Port of Frederikshavn made an agreement with Per Aarsleff A/S regarding completion of stage 1 of the port enlargement.

The port enlargement comprises, amongst other things, of new outer breakwaters, quay facilities and hinterland areas for 570 million Danish kroners and is expected to be finalized by the spring of 2018.
 

STAGE 1



Nearly 2.7 km of breakwater will be established, divided between 1.9 km on the northern breakwater and 800 m on the southern breakwater.

The rocks for the construction of the breakwaters are from Norwegian and Swedish quarries and delivered by ship and barge. In order to receive the rocks, the entrepreneur has established a temporary working harbour. Approximately 700,000 tons of rocks are to be used for the construction of the two outer breakwaters all together.

The outer breakwaters will be finished off with vertical breakwater heads, which mark the approach to the harbour. Approximately 1,050 tons of steel will be used for the construction of the vertical breakwater heads.

Behind the outer breakwaters 2,400,000 m³ expansion material from the navigation channel and harbour basin will be filled up to establish 330,000 m² hinterland area.

A new quay facility of 600 m will be established with 11 m water depth, prepared for further depth, which will make it possible for even larger ships to enter the harbour than before. For the quay wall almost 3,400 tons of steel will be used.

Behind the quay wall, a 50 m wide quay street will be established, with an accumulated area of 30,000 m².

Admittance to the port expansion will be by means of an extension of Sandholm.

 

NORTH BREAKWATER

The north breakwater will be approximately 1.9 km long.

It will be constructed as a traditional rock toss breakwater, according to below cross-section of the north breakwater:
 

CROSS-SECTION OF NORTH BREAKWATER



The breakwater will consist of an inner core of small rocks, on top of which several layers of rocks, increasing in size, will be added. The top rocks will have a weight of up to 8,000 kg.

A service road will be established along the northern breakwater, which will be open to the public and grant access to the breakwater head. The service road will be 4 m wide.

The northern breakwater will primarily be built up of layers from land and from the new admittance road, hence the breakwater will be used as transportation road for delivery of rock material.

Rocks will be laid down by means of a hydraulic digger.

 

NORTHERN BREAKWATER HEAD

The north breakwater will be finished off with a vertical breakwater head, which marks the approach to the port.

The breakwater head will be built up of a combination wall, consisting of steel pipe piling and sheet piling. The breakwater head will have a size of approximately 26 x 30 m.

There will be access to the north breakwater head from land.

The breakwater head will be provided with wave shield and fence, in order to make it possible to stand on the breakwater head and overlook the port and Kattegat.
 

CROSS-SECTION OF NORTHERN BREAKWATER HEAD

 

SOUTH BREAKWATER

The south breakwater will be approximately 800 m long.

The outermost 525 m of the south breakwater will be constructed as a traditional rock toss breakwater, according to below cross-section of the south breakwater:
 

CROSS-SECTION OF SOUTH BREAKWATER

The breakwater will consist of an inner core of sand, which will be dredged from the island of Laesoe, on top of which several layers of rocks, increasing in size, will be layered. The southern breakwater will be built up the same way as the north breakwater.

The inner 275 m of the south breakwater will be constructed as an underwater breakwater, which will stop current and sediment transportation from entering the harbour and will therefore be submerged below sea level. The breakwater will be visible during low tide, however during normal water level, it will be just below sea level. The underwater breakwater will be marked with vertical steel poles (radar reflector).

The underwater current and sediment trap will be built as per cross-section below:
 

CROSS-SECTION OF UNDERWATER BREAKWATER



The underwater breakwater will be built up on a foundation of sand, on top of which layers of rocks, increasing in size, will be layered. The underwater breakwater will be marked with vertical steel poles.

The south breakwater will be constructed from a floating work platform with hydraulic digger, which will move rock material directly from ship.

 

SOUTHERN BREAKWATER HEAD

The southern breakwater head will, as the northern breakwater head, be finished off with a vertical breakwater head by the approach, however without wave shield and fence.

There will not be admittance to the southern breakwater head from land.
 

CROSS-SECTION OF SOUTHERN BREAKWATER HEAD
 

 

QUAY

The future quay will be 600 m long.

Along the quay, the water depth will be extended to 11 m, however the quay will be prepared for 14 m water depth in order to secure future arrivals of large ships.

The quay will be constructed with a combination wall, consisting of steel pipes and sheet piling, it will be finished on top with a quay wall of concrete.

The quay will be tethered to the concrete anchor plates and steel piling, which will be placed 30 to 50 m behind the quay.
 

CROSS-SECTION OF THE FUTURE QUAY FACILITY

 

DEEPENING AND FILLING UP

The existing navigation channel of approximately 2 km in length, will be deepened to 12 m and expanded to a width of 150 m.

Within the new outer breakwaters, water depth will be deepened to 12 m in the new turning basin and 11 m water depth by the new 600 m quay.

It will be possible to increase water depth up to 15 m in the navigation channel and the turning basin, and 14 m along the new 600 m quay.

The material dredged from the deepening, will be used for filling up the hinterland area.

The hinterland will consist of 330,000 m². Nearly 2,400,000 m³ sand and clay collected from the navigation channel and the harbour basin will be used for the filling up.

As long as the new outer breakwaters have not been established, the deepening may only be carried out within the period between October to April in order to take into consideration the growth season of the marine plants and in order to minimize inconveniences to bathing guests on nearby beaches. Therefore, the deepening was started up again in the fall of 2016.

The deepening will be carried out by sand dredgers, hydraulic diggers and bucket chain excavators.

The dredged sand will be pumped to the hinterland by means of pipes.

The clay material collected by the diggers and / or bucket chain excavators will be collected on barges and sailed into the hinterland and deposited.