QUANTITIES | DREDGING

Environmental dredging 1,211 m3

Dredging 36,425 m3

QUANTITIES | RETAINING QUAY WALL

Quay wall length/height 139 m/14.82 m

Coping beam length 139 m

Erosion protection slabs 920 m2

Concrete structures, total 2,469 m3

MAIN PLANT

Backhoe dredger Kuokka-Pekka 2 (Liebherr P 984 B)

Grab dredger Kahmari 2 (Liebherr HS 895 HD)

Self-propelled barges George and Hans (500 m3 each)Adam and David (150 m3 each)

Floating crane Nosto-Pekka (Max. 200 tons)

Work pontoon Bolle VIII (70.4 x 20.0 x 4.0 m)

Tug Glytten (142 kW | 1.3 tons)

Crawler crane on land Liebherr LR 1750 (Havator Oy)Max. load capacity 750 tons

Other plant Slipforming equipmentExcavators on land

INTRODUCTION >

PROJECTSHEETMETSÄ BOARD HUSUM MILL, SWEDENVIKING HAMN PROJECT,NEW 139-METRE LONG RETAINING QUAY WALL

Terramare Oy

Laurinmäenkuja 3 A

PO Box 14, FI–00441 HELSINKI, FINLAND

P +358 9 613 621 | F +358 9 6136 2700

www.terramare.fi PAGE 1/2

FEATURES

Client Metsä Board Sverige AB

Project Viking Hamn project

Location Metsä Board Husum Mill, Husum, Sweden

Period July 2015 – May 2016

Contractor Terramare Oy

SCOPE

Construction of the Husum Mill area’s new 139-metre long retaining quay wall with pre-fabricated quay elements. Dredging of soft materials, fi lling and deep compaction of the foundation. Backfi lling and fi eld constructions, including construction of the harbour fi eld’s electrical, piping and surfacing work. Daywater and sewage system, including 16 DW-wells. Construction of two lighting mast foundations, including 24-metre high lighting masts and electrical works. Terramare delivered the quay wall fully equipped, including fenders, bollards and rescue ladders.

A

A View of the retaining quay wall at Metsä Board Husum Mill.

METSÄ BOARD HUSUM MILL, SWEDENVIKING HAMN PROJECT,NEW 139–METRE LONG RETAINING QUAY WALL

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Terramare Oy

Laurinmäenkuja 3 A

PO Box 14, FI–00441 HELSINKI, FINLAND

P +358 9 613 621 | F +358 9 6136 2700

www.terramare.fi PAGE 2/2

B

INTRODUCTIONMetsä Board Sverige AB planned to

substantially enhance and expand

board production at its Husum Mill

in Sweden. Expanding the harbour

was also part of the plan to boost

production at the Husum Mill.

A new 139-metre section of re-

taining quay wall was built at the harbour by Terramare Oy.

Works included the new lo-lo quay and harbour fi eld with ac-

cessory fi ttings.

The project was started in July 2015 with mobilising the site

and starting to manufacture the quay element base slabs. Com-

pletely new assembly towers were made to make the installa-

tion of pre-fabricated reinforcement elements into the element

base slabs easier and safer. After the base slabs were ready,

slipform casts were installed into the fi rst casting position.

At the beginning of September, installation of the silt screen

was started as well as putting the unloading pontoon Bolle

VIII in place and fi nalising the dewatering basins. Dredging

was done in September – October at the same time with the

slipform casting of the quay elements. After dredging opera-

tions were fi nished and the client had accepted the dredging

results, rock fi lling works were started. After enough fi ll for

the base embankment, deep compaction and base levellings

were done.

A 750-ton crawler crane was mobilised from Finland to help

with the installation of the quay elements, which was done

in co-operation with our own fl oating crane Nosto-Pekka in

November and fi nished at the beginning of December. A

newly-made installation raft helped with the positioning of the

elements. Field works for light masts, daywater system and ca-

ble protection pipes were started in December and continued

throughout the beginning of 2016. Construction works were

stopped at the beginning of January due to winter conditions

and they were continued in the middle of March.

The coping beam was completed in the middle of April. The

remaining fi eld works, including asphalting, were fi nalised in

the fi rst half of May. Final inspection and handover to the cli-

ent was done at the end of May, according to the original

schedule.

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D

E

B The backhoe dredger Kuokka-Pekka 2 and grab dredger Kahmari 2.

C The quay wall´s concrete K elements (16 pcs) and intermediate

D Installing the quay wall´s elements with the 200-ton floating crane

E Construction of the harbour field, after the coping beam installation.

S elements (15 pcs) were made with slipform casting.

Nosto-Pekka and 750-ton crawler crane.