boskalis area nordic | information magazine no. 02 / …€¦ · the functioning of the core...

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INTERNATIONAL DREDGING AND MARINE EXPERTS

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BOSKALIS NORDIC TODAY

BOSKALIS AREA NORDIC | INFORMATION MAGAZINE

NO. 02 / 2016 — 2017

EDITOR–IN–CHIEF Henrik Holmberg

P +358 (0)9 6136 2622

F +358 (0)9 6136 2700

E–MAIL: [email protected]

EDITING & LAYOUT Markku Salonen

BOSKALIS AREA NORDIC

Boskalis Area Nordic has strong experience and special

know-how in harbour and marine construction. Specialisation

in different types of services, such as underwater drilling and

blasting, port construction and various dredging methods in

different soil types, has made us one of the leading contrac-

tors in the Nordic countries.

The Boskalis Area Nordic companies mentioned below

provide all the services in their region.

TERRAMARE OY | FINLAND

BOSKALIS SWEDEN AB | SWEDEN

ROCK FALL COMPANY LTD | UNITED KINGDOM

TERRAMARE EESTI OÜ | ESTONIA

OUR COMMON WEBSITE:

WWW.BOSKALIS.COM/NORDIC

Our parent company is the globally operating Royal Boskalis

Westminster N.V. The listed company operates in 75

countries on six different continents.

IN THIS ISSUE

PAGE 08

PAGE 12

NORDIC ECOLABEL 4041 0750

Ecolabelled Printing Paper

COVER PHOTO

COMPLETED CAISSON FOUNDATION ON

NOSTO-PEKKA’S DECK | PHOTO: TERRAMARE OY

MANAGING DIRECTOR’S COLUMN

CORE OF STRATEGY CLARIFIED

TERRAMARE’S DEPUTY MANAGING DIRECTOR

HANNU TOMPERI

THE SUPPORTING PILLARS OF THE COMPANY’S

OPERATIONS

CUSTOMER’S NEWS

TAPANI JAAKKOLA, ARCHIPELAGO TRANSPORT

PROCUREMENT EXPERT, ELY CENTRE FOR SOUTHWEST

FINLAND

PARAINEN-NAUVO FERRY BERTH

CHARGEABLE FERRY BERTHS FOR NEW HYBRID VESSEL

HERNESAARI PRE-CONSTRUCTION WORK

MASSIVE SEA-FILLING FOR HELSINKI HERNESAARI

CRUISE SHIP QUAY

NEWS

NINA KESSELI TO BE EDITOR-IN-CHIEF OF BOSKALIS

NORDIC TODAY

BOSKALIS AREA NORDIC´S WORK SITES TODAY

BACK COVER

SCG BARGE AT HELSINKI HERNESAARI WORK SITE

PHOTO: MARKKU SALONEN

to Hannu a warm welcome back to Terramare after 12 years of experience acquired outside the company.

During 2016, we have managed to accumulate a good order book, consisting of a number of marine construction projects of various sizes, mainly in Finland and in Sweden. The projects in question will require the utilisation of our own specialised fl eet and equipment and, at the same time, an increase in personnel resourc-es in project and administrative positions will also be needed.

I would like to thank all of our employees for their strong commit-ment to our company’s operations, and a big thank you is also due to our various stakeholders for the excellent cooperation we shared throughout the year, and which we hope will continue into the future.

I wish all readers of this publication a good start to 2017!

Jarmo Yletyinen MANAGING DIRECTOR, TERRAMARE OY, FINLAND

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On the evidence of several indicators, the outlook for the construction market in Europe seems modest, except in the oil and gas industry. Competition in the global ma-

rine construction market is likely to be challenging, and it appears that the situation will also be the same in Europe in the next few years.

Under the “Connecting Europe” strategy programme, published by the European Union in 2013, a total of EUR 24 billion has been allocated to transport project development in the period 2014–2020. One of the key objectives of this programme is to improve the functioning of the core transport network corridors connecting EU member states. The aim is thereby to promote more effi cient competition and seamless transport of passengers and freight be-tween states. The core of the programme is to focus resources on nine separate major transport networks, which are due to be completed by 2030. One of these major projects is the transport network connecting Scandinavia and the Mediterranean. Its most signifi cant single project is the planned approximately 18 kilome-tre-long Fehmarnbelt immersed underwater tunnel link between Denmark and Germany. Conditional contractor agreements be-tween the client organisation and contractors have already been signed for what will be the world’s longest combined road and rail tunnel. The agreements will be fi nally confi rmed when the environ-mental permits have been approved.

In our own market area, Finland, the other Nordic countries and the Baltic countries, the outlook for future projects now appears to be the best for a long time, even though there are big differences between countries. In Sweden, for example, long-term investment is continuing. This will become evident in the coming years as a number of large projects are implemented. By contrast, in Finland the ‘one government term’ principle still seems to apply, which has led to short-term investment. In domestic construction, how-ever, alongside traditional public projects, extensive investment in various energy projects is perceptible. Good examples of these include, for example, the liquefi ed natural gas (LNG) terminals under construction and the various gas pipeline projects associ-ated with them.

In Terramare, we have prepared a strategic plan for the next few years that is clearer than before. The core of the plan still consists of developing our traditional areas of expertise. For the develop-ment of these functions, we have strengthened our organisation by appointing Hannu Tomperi M.Sc. (Civ.Eng.) as our company’s Deputy Managing Director as of 6 October 2016. We extend

CORE OF STRATEGY CLARIFIED

MANAGING DIRECTOR'S COLUMN

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Hannu Tomperi M.Sc. (Civ.Eng.), from Ylikiiminki in Northern Ostrobothnia, has been appointed Deputy Man-

aging Director of Terramare. Tomperi (47) returns to a familiar working environment, because while studying and after graduat-ing he worked for Terramare for around ten years on quay, dredging, drilling and blast-ing sites, gathering experience as a survey-or, production engineer and site manager.Memorable projects from the early years of his career include quay work at Kotka’s Mussalo deep-water harbour, construction of a gas pipeline between Scotland and Ireland, and dredging of military explo-sives using remote-controlled methods in the Kokkola fairway. He has also become familiar with marine construction via his fa-ther and uncle, who are likewise stalwarts of the marine construction sector.

“I have fond memories of my fi rst years with Terramare, because at that time a unique team spirit, a determined focus and bold innovation prevailed in the company. They certainly left a lasting impression, and the many challenging projects implement-ed back then have remained highlights of my career,” says Tomperi.

“So, when the opportunity arose to come back, I didn’t hesitate. This company has a strong professional expertise, special skills and excellent capacity, which I would like to develop and strengthen further,” adds Tomperi.

Tomperi has a clear vision of the key is-sues in the company’s development work.

“During my career, I have identifi ed three important pillars in business, namely prof-itability, occupational health and safety, and the requirement for excellent super-

PERSONNEL NEWS | TERRAMARE’S DEPUTY MANAGING DIRECTOR HANNU TOMPERI

THE SUPPORTING PILLARS OF THE COMPANY’S OPERATIONS ARE PROFITABILITY, OCCUPATIONAL HEALTH AND SAFETY, AND EXCELLENT SUPERVISOR WORK

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BOSKALIS AREA NORDIC´S OPERATING PRINCIPLES ARE: WE DO WHAT WE PROMISE — RIGHT FIRST TIME — WORKING TOGETHER

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visor work. By excellent supervisor work I mean that, in addition to technical and fi nancial expertise, we must also master good interaction skills. An open and com-municative working environment motivates the entire staff, and it brings out the best ideas and puts all of the company’s skills to use,” emphasises Tomperi.

“Ensuring the company’s profi tability is naturally dependent on a number of important factors. In the infrastructure business, it is necessary to spend a lot of time particularly on calculation work and project preparation, because there is al-ways uncertainty and risk factors associ-ated with the starting information. Most of what we do is hidden under water, and the marine working environment, with its changing weather conditions, always presents its own challenges. Good profi t-ability increases employee motivation and morale. Terramare’s operating principles: we do what we promise, right fi rst time, and working together have been excellent choices as operating principles, and they will take us far,” says Tomperi.

As an issue, occupational health and safety has been close to Tomperi’s heart since the beginning of his career. He was involved in preparing Terramare’s fi rst oc-cupational health and safety manual as well as the safety management system for barges.

“Occupational health and safety con-sists of many important elements, which can be summarised briefl y as follows: the company’s safety systems and routines, the employees’ safety expertise, and personal attitudes. When all these elements are in order at the same time, they form the com-pany’s safety culture, namely our common

daily approach to delivering safety,” says Tomperi.

“We all have the right to come home from work in a healthy condition. We must remember that we are responsible to our families and loved ones for our health, both in the workplace and during leisure time. I hope that the development in attitudes will mean, for example, that supervisors’ and colleagues’ intervention in risk situations involving momentarily negligence or inat-tention will always be considered a posi-tive and joint issue,” explains Tomperi.

Tomperi returned to work in Terramare in October 2016. Since then, he has been busy acquainting himself with the Boskalis Group as well as Terramare’s current op-

erations, projects and personnel. He also seeks balance to his work-fi lled days.

“Maintaining physical and mental condi-tion is an important matter for every one of us. I keep myself in shape with Nordic walking and swimming. The coming winter will again present opportunities for cross-country skiing, which is one of my favour-ite sports. I try to devote my weekends to my family and to my 10 year-old son’s hob-bies,” says Tomperi in conclusion.

Terramare wishes Hannu Tomperi

a warm welcome to the company’s

service!

Hannu Tomperi M.Sc. (Civ.Eng.) has been appointed Deputy Managing Director of Terramare Oy. His areas of responsibility include the company’s business development and operations in Finland. As his fi rst task, Tomperi has participated in preparing the company’s strategy and deployment plan for the next three years (2017–2019). Tomperi has returned to his roots in Terramare from Skanska, where he served for over 12 years in a number of management positions, with responsibility for, among other things, infrastructure construction, asphalt business, fl eet operations, and occupational health and safety.

‘

0101 DEPUTY MANAGING DIRECTOR HANNU TOMPERI CHERISHES

an open and communicative working environment that motivates all

employees. Interactive cooperation and good team spirit enhance

the company’s expertise, work safety and profi tability.

WE ALL HAVE THE RIGHT TO COME HOME FROM WORK IN A HEALTHY CONDITION’ Hannu Tomperi

BOSKALIS AREA NORDIC | INTERNATIONAL DREDGING AND MARINE EXPERTS | WWW.BOSKALIS.COM/NORDIC

PARAINEN−NAUVO FERRY ROUTE ENTERS THE HYBRID AGE’

06 CUSTOMER’S NEWS | ELY CENTRE’S ARCHIPELAGO TRANSPORT PROCUREMENT EXPERT TAPANI JAAKKOLA:

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In spring 2015, the Centre for Economic Development, Transport and the Envi-ronment (ELY Centre) for Southwest Fin-

land and Suomen Lauttaliikenne Oy (Fin-ferries) signed an agreement by which the service capacity of the, at times, congested ferry route between Parainen and Nauvo will be increased with a new type of hybrid ferry, the fi rst of its kind in Finland, as well as upgraded and improved ferry harbours for the vessel. The ferry, which will mainly operate with battery packs rechargeable with shore power and, if necessary, using diesel-generated electricity will enter into service in summer 2017. The ELY Centre’s Archipelago Transport Procurement Expert

Tapani Jaakkola considers the project to be a signifi cant step forward.

“The ‘bottleneck’ caused by the ferry route between Parainen and Nauvo has been problematic for traffi c for a long time now. Over the years, plans have been proposed for the replacement of the ferry route with a bridge or even a tunnel, but these options would be very costly and challenging to implement. So the only op-tion was to enhance the ferry traffi c, and a sustainable and cost-effective solution has now been found for this,” explains Jaak-kola.

“Relief will now be brought to the ferry route in the form of an environmentally friendly, energy-effi cient hybrid ferry that is larger than the present vessels, which will increase service capacity consider-ably. Compared with the current service with two ferries, capacity on the route will

be increased by around 30%, with depar-tures every 15 minutes. Capacity will also be higher than a situation in which all three ferries currently in use would operate. The new ferry also has a larger capacity than the present ferries. It will hold 90 passen-ger cars, and the vessel’s deck arrange-ment will also facilitate faster unloading and loading of vehicles,” says Jaakkola.

When the hybrid vessel becomes the main ferry on the Parainen-Nauvo route, the present Sterna will become the number two vessel, and the present number two vessel Falco will become the back-up ves-sel. The current back-up vessel Odil will be withdrawn from the route.

“The new ferry is in many ways an inter-esting investment. A corresponding vessel equipped with hybrid technology is not in service elsewhere in Finland. As far as I understand, it is the fi rst road ferry imple-

ATTITUDE IS DECISIVE’ ‘Tapani Jaakkola


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The ferry route between Parainen, Lillmälö and Nauvo, Prostvik in the Turku archipelago is Finland’s busiest. Its average daily traffi c is 1,600 vehicles, but in summer traffi c rises to 2,400 vehicles, at which time waiting times for the ferry have been occasionally very long. Relief will now be brought to the ferry route in the form of an environmentally friendly, energy-effi cient hybrid ferry that is larger than the present vessels.

mented with hybrid technology and among the fi rst vessels of its kind anywhere in the world. We are therefore well up to speed in developing solutions for the future,” says Jaakkola.

Finland’s yellow island and road ferry service has a long history and it remains part of the Finnish cultural landscape both in the archipelago and on inland water-ways, particularly the Turku archipelago and the lake areas of Eastern Finland. In the 1950s, nearly 140 ferries were in serv-ice on Finland’s public roads. Currently, there are still more than 40 ferries in op-eration. There are two kinds of ferry: freely steerable vessels and those (called lossi in Finnish) guided by cables. The ELY Centre for Southwest Finland is responsible for archipelago services, i.e. road and com-muter ferries, throughout Finland.

“Worldwide, Finland’s road ferries are a rare phenomenon. We do have a lot of ar-chipelagos and waterways, so ferry serv-ices are an essential part of citizens’ basic services, with a high level of trust placed in their effi cient operation and punctual-ity. Our ferries are also very safe, reliable and long-lasting. The oldest still in service are cable ferries that have been operating since the 1970s. A special feature of the Finnish road ferry service is that it is free of charge and it operates all year round despite the challenging winter conditions. The ice situation can also be put to good use, because on two ferry routes in North-ern Finland we also maintain offi cial ice roads in the winter,” explains Jaakkola.

Jaakkola, who initially considered a ca-reer as a sea captain, graduated in 2009 as a logistics engineer. The following year, he made his way to the ELY Centre for Southwest Finland, where he specialised to become its current expert on archipela-go transport. Alongside his work, Jaakkola continued studying and he graduated with a University of Applied Sciences degree in construction engineering.

“It’s certainly true that, right from the very beginning, my job description has been rather unique. For the archipelago trans-port operating in our area of responsibil-ity, we have a compact team that carries out service logistics planning, competitive

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tendering, project management, procure-ment, and contract preparation. It is, in a positive sense, challenging work in all re-spects, where different actors and elements come together to create effective units. Moreover, the prevailing transport policy providing forward guidance at any given time is also a signifi cant factor in our work. Another element delivering added value to the job description is Nordic cooperation, within the scope of which both information and experiences are exchanged from time to time,” says Jaakkola.

“Of course, criticism always arises when projects are implemented, and this is also the case now as the construction stages of the Parainen-Nauvo route get under way.

Traffi c arrangements at this provisional stage are not to everyone’s liking, but suffi -cient understanding is reached when peo-ple become aware that by the end of the year harbour work will be completed and that conditions will improve signifi cantly when the new vessel starts operating in summer 2017. I myself am also eagerly awaiting the completion of the project, which is proceeding well on schedule, be-cause it is always rewarding to see how the result of long-term work takes shape as a functioning service,” says Jaakkola in conclusion.

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TAPANI JAAKKOLA WORKS AS AN EXPERT

in the internationally unique team responsible for road ferry

services in the ELY Centre for Southwest Finland, which oversees

Finland’s archipelago transport network.

THE PARAINEN-NAUVO FERRY ROUTE IS PART OF

the circular Turku Archipelago Trail, which is popular in the sum-

mer. Travellers on the trail move from island to island sometimes

over bridges, sometimes carried by ferries of various kinds. Visit

the Turku Archipelago Trail website: www.saaristonrengastie.fi


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In the Turku archipelago, on the ferry route between Parainen and Nauvo, a unique project is under way involv-ing the construction of harbour berths

for charging Finland’s fi rst hybrid ferry. In an ELY Centre for Southwest Finland project, Terramare is implementing modi-fi cation and improvement work at the ferry harbours that will facilitate, among other things, the installation at a later date of energy charging technology for the new hybrid vessel. The hybrid ferry has been ordered by Suomen Lauttaliikenne Oy, also known by the name Finferries, which operates on the route.

CHARGEABLE FERRY BERTHS FOR NEW HYBRID VESSEL

PARAINEN-NAUVO FERRY BERTH | LILLMÄLÖ AND PROSTVIK FERRY HARBOUR PROJECT

The new, low-emission and quieter hy-brid ferry is a step in a more environmen-tally friendly direction. Alongside diesel electricity, battery packs chargeable with shore power will serve as the ferry’s en-ergy sources. The energy-effi cient ferry is much larger than the ferries that currently operate on the Parainen-Nauvo route. The vessel is 96 metres long and 16 metres wide, and it is able to carry 90 passenger cars at one time. The hybrid ferry will run most of the year on shore power, but in winter, depending on ice conditions, the vessel may also start its diesel generators, if necessary.

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NAUVOProstvik

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TWO IDENTICAL CONSTRUCTION SITESThe large hybrid vessel needs stronger fer-ry berths equipped with charging technol-ogy. In the project, Terramare will imple-ment the upgrading of the ferry berths at Lillmälö on the Parainen side and Prostvik on the Nauvo side. The contract includes, among other things, abutment renewals, construction of mooring points equipped with power and mooring equipment, trans-former substations, raising of breakwaters, embankment cladding, harbour accessory installations, and harbour fi eld surfacing work, such as asphalting, barrier and rail-

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THE PHOTO SHOWS CASTING WORK BEING CARRIED OUT

for the mooring point being built on a caisson foundation at the

Prostvik ferry berth, Nauvo. Charging devices required by the

hybrid vessel will be installed on the mooring points constructed

in connection with the renewed harbour berths.

FINLAND’S MOST ENVIRONMENTALLY FRIENDLY

hybrid ferry will enter into service in summer 2017. Suomen

Lauttaliikenne Oy (Finferries) has ordered the ferry from the

Polish shipyard Crist S.A. The vessel’s technology will be sup-

plied by Siemens.

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In an ELY Centre for Southwest Finland project, Terramare is implementing modifi cation and improvement work at the Lillmälö and Prostvik ferry harbours. The work involves the construction of upgraded ferry berths incorporating charging towers and automatic mooring equipment for Finland’s fi rst hybrid vessel.

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Diesel engines and generators Solar panels

900 kW 900 kW

1 MWh battery pack

ARTIST’S IMPRESSION OF THE NEW HYBRID VESSEL & GRAPHICS | SUOMEN LAUTTALIIKENNE OY (FINFERRIES)

ARTIST’S IMPRESSION OF THE NEW HYBRID VESSEL


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ing installations, and light fi ttings.“Our project consists, in principle, of two

nearly identical sites on opposite shores, where dredging work began with the Kuokka-Pekka 5 in the spring. With regard to the dredging masses, it can be said that sample analyses showed them to be very clean. The laboratory confi rmed that were cleaner than the sand boxes of many play parks,” says Terramare Project Manager Marko Saarelma.

“Preliminary work also included the cast-ings of caisson foundations for the moor-ing points to be constructed at the loca-tions. These took place at Turku’s Pansio

harbour. The completed caisson elements, a total of four, were transported to the lo-cations by barge, after which they were installed in their designated positions to serve as foundations for the two mooring points. The implemented mooring points are around 14 metres long and 7 metres wide,” explains Saarelma.

Caissons are traditional ground-supported massive foundations of marine structures, and they can be implemented in relatively shallow water. The foundation is prepared on dry land, transported into place, sub-merged, weighted by infi lling, and then erosion protected. Caisson foundations

can serve as the foundations of mooring points and lighthouses, for example.

“The implementation of the mooring points of both ferry berths includes moor-ing plates installed on top of the super-structures for the charging towers and au-tomooring equipment. The mooring point’s automooring equipment will always be connected to the hybrid ferry’s charging tower when vehicles are loaded and un-loaded, alternately on each shore,” says Saarelma.

“The mooring point work also includes full accessories, such as installations of fender plates, bollards and ladders as well as cables running to the mooring points and approximately 30-metre long access bridge,” adds Saarelma.

NEW, STRONGER ABUTMENTSAlongside the mooring points, the ferry berth abutments were also renewed. The old structures were removed and replaced with new ones. Ferry harbour abutments are quay-like structures on which surveil-lance and safety devices are installed as well as carriageways leading to the ferries.

“The abutment projects on the oppos-ing shores differed from each other. On the Parainen side, the concrete slab of the abutment was cast on top of bored piles. On the Nauvo side, the abutment was cast and anchored directly into the bedrock,” says Terramare Site Manager Markku Sollo.

“The abutment reinforcing, casting and installation work went perfectly, even though at one stage the sea surface rose

Mooring point• Charging • towerAutomooring•

30-metre access bridge

HYBRID FERRY

Renewed abutment and surfacing

Raised and blasted rock clad breakwater

Shore blasted rock cladding and cable duct

ARTIST’S IMPRESSION OF FERRY HARBOUR BEING RENEWED AT LILLMÄLÖ, PARAINEN

Floating approach

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PARAINEN-NAUVO FERRY BERTH | LILLMÄLÖ AND PROSTVIK FERRY HARBOUR PROJECT

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momentarily during moulding above the bottom edge. In addition to the installation of the abutments, which are equipped with hinge brackets, the contract also included surface work and accessories, such as bar-riers, railings, lights, electrical fi ttings and control cabinets,” adds Sollo.

The ELY Centre for Southwest Finland will connect new fl oating approaches to the hinge brackets of the renewed abutments. A fl oating approach is a carriageway running from a ferry to an abutment, one end of which is attached to the abutment with hinges while the other end fl oats on pontoons. The carriageway is therefore al-

ways at the same level as the sea surface and the ferry ramp attached to the fl oating approach.

LANDSCAPING IMPROVEMENTSIn addition to fully equipped mooring points and abutments, the Terramare contract also includes blasted rock cladding of the shore embankments in the harbour area as well as raising the height of breakwaters, which at the same time will improve the general appearance of the ferry harbours in this beautiful archipelago area. At the end of the contract, the harbour and vehicle traf-fi c fi elds will be asphalted and protected

with roadway barriers.Terramare began the modifi cation and

improvement work of the Lillmälö and Prostvik ferry harbours in April 2016. The contract period will run until the end of May 2017. The site will employ around 15 people. Of Terramare’s marine con-struction fl eet, the dredger Kuokka-Pekka 5, two towable barges, the work barges Upi, Lossi and Bolle III as well as ground equipment participated in the contract. Subcontractor Raision Sähkö-Insto Oy was responsible for the electrical work.

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THE CAISSONS INTENDED AS THE MOORING POINT

foundations were cast at Turku’s Pansio harbour. The caissons

were transported to the Parainen and Nauvo harbour sites by

work pontoon.

PICTURED IS A READY-CAST MOORING POINT,

in which will be installed, in addition to the charging technol-

ogy, the necessary accessory equipment, such as fenders,

bollards, railings and ladders. 30-metre access bridge will also

be installed for the mooring points.

AN ABUTMENT, READY EXCEPT FOR SURFACING WORK,

at Lillmälö, Parainen. The ELY Centre will connect to the hinge

brackets a fl oating approach, i.e. a carriageway leading to the

ferry.

THE LILLMÄLÖ AND PROSTVIK FERRY HARBOURS’

modifi cation and improvement project has also included blasted

rock cladding of the area’s shores as well as surfacing work

and accessories on the harbour fi elds.

0505

0606 BOSKALIS AREA NORDIC | WWW.BOSKALIS.COM/NORDIC

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At the tip of Hernesaari in Helsinki, Terramare is implementing, in con-nection with the Port of Helsinki’s

West Harbour, pre-construction work for a future quay intended for over 300-metre long cruise ships. Preliminary work and dredging included in the contract, ordered by the Helsinki Public Works Department, is followed by a stage in which Terramare is carrying out blasted rock sea-fi lling of the embankment of the future quay struc-ture.

320,000 m3 OF BLASTED ROCK FILLINGThe sea-fi lling of the embankment of the Hernesaari cruise ship quay is being car-ried obliquely from shore to sea in a south-easterly direction parallel to the present Lokkiluoto–Saukonnokka fairway. The

MASSIVE SEA-FILLING FOR HERNESAARI CRUISE SHIP QUAY

HELSINKI WEST HARBOUR | PRE-CONSTRUCTION WORK FOR THE HERNESAARI CRUISE SHIP QUAY

length of the embankment will total around 350 metres and the width of the upper surface will be 35 metres. In addition, a 60-metre blasted rock widening will be carried out at the tip of the future quay.

Blasted rock fi lling is taking place along the entire length from sea level to an el-evation of +2.2 metres. After fi lling, the tip section of the embankment will be fi nished with erosion protection cladding. The sea-fi lling consists, in its core, of mixed blasted rock of various sizes and, in its surface layers, an erosion-protected section of screened blasted rock.

“For the embankment of the future quay structure will be used a total of around 320,000 m3 of blasted rock, which is main-ly being transported to the site by sea on barges from Jätkäsaari and Kruunuvuori, Helsinki. The uppermost blasted rock lay-

ers of the embankment have been brought to the site from onshore sources, mainly the excavation sites of the Western Metro and Töölö parking hall,” says Terramare Site Manager Markku Pöyhönen.

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“In the fi lling implemented from onshore, the blasted rock has been transported to the site at a rate of 30 truckloads, i.e. just over 20,000 m3, per week. Effi cient scheduling of the blasted rock transports has played an important role in this, and the heavy traffi c in Hernesaari and other parts of Helsinki also had to be taken into account,” adds Pöyhönen.

100,000 m3 OF DREDGINGBefore the dredging and blasted rock fi ll-ing work, Terramare carried out the remov-al and reinstallation of submarine power and telecommunication cables as well as mains water and sewer pipes running from Hernesaari to Pihlajasaari Island.

After this, Terramare implemented envi-ronmental and mass transfer dredging at the site as well as levelling of the founda-tion embankment of the future quay struc-ture, where the bottom level was dredged to an elevation of −18 metres then fi lled to a level of −12.75 metres.

“We have employed our diverse dredg-ing fl eet and equipment here. The environ-mental dredging was done with backhoe dredger Koura, the soft sediment dredging with the grab dredger Kahmari 2, and the hard friction soils dredging and blasted rock fi lling work with the backhoe dredger

Attila. As load vessels and to dredging and blasted rock fi lling work were assigned the 500 m3 capacity self-propelled barges George and Hans, as well as the towable 500 m3 capacity SCG barges Sami from Suomen Vesityö Oy and Arska from Tow-ing J & J Oy,” explains Pöyhönen.

“The environmental dredging removed a total of 30,000 m3 of contaminated sedi-ment, after which around 75,000 m3 of soft sediment, such as clay and silt, was dredged down to the hard bottom. Some 6,000 m3 of friction soils dredging was also carried out, so the total amount of dredging material reached 100,000 m3,” adds Pöyhönen.

HELSINKI’S SURFACE AREA IS GROWINGThe fi lling of the embankment that began after around 4.4 hectares of dredging will increase the surface area of Helsinki by around 1.6 hectares. The contract period of Terramare’s pre-construction work runs until the end of March 2017. The Port of Helsinki will start the construction of the new cruise ship quay in April 2017 and it will enter into service for cruise ship traf-fi c in April-May 2019. The new quay will replace the West Harbour’s present cruise ship quay, the Melkinlaituri quay.

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PICTURED IS THE BACKHOE DREDGER ATTILA

at the tip of the sea-fi lling area. In the background is the shore

of the Hernesaari fi lling area.

TERRAMARE SITE MANAGER MARKKU PÖYHÖNEN

caught in a sudden snow fl urry at the beginning of November.

THE SURFACE LAYERS OF THE BLASTED ROCK FILLING

have been brought to the site by land at a rate of just over

20,000 m3 per week.

THE LEADING ROLE IN THE SEA-FILLING WORK HAS BEEN

played by barges, each of which has a load capacity of 500 m3.

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14 NEWS

NINA KESSELI TO BE EDITOR-IN-CHIEF OF BOSKALIS NORDIC TODAY

SHE-Q Manager Henrik Holmberg, editor-in-chief of our publication Boskalis Nordic Today, will retire in summer 2017. He will be succeeded by Terramare Project Assistant

Nina Kesseli, a long-standing member of the editorial team. “I am happy to accept the position of editor-in-chief, because

producing our magazine each summer and winter is always a highlight of the year. It’s nice to bring into the spotlight our interest-ing marine construction projects and customers’ news as well as other issues that are an essential part our company’s operations,” says Kesseli.

“Editing the magazine is a fascinating process in which we try via photos and interviews to bring projects closer to our readers. On the other hand, marine construction is in itself a specialist fi eld that deserves its own forum,” explains Kesseli.

Henrik Holmberg has served as editor-in-chief of Boskalis Nordic Today since the early days of the publication in 1989.

“It is with confi dence that I leave editorial responsibility for our magazine in the hands of Nina Kesseli and our editor Markku Salonen. Both have been in the magazine’s team for nearly a decade, so we can be sure that this duo already knows their stuff – as the positive customer feedback also proves. Thanks for enjoying our magazine over the years,” says Henrik.

01 THE BOSKALIS NORDIC TODAY EDITING TEAM:

future editor-in-chief Nina Kesseli (centre), editor and

graphic designer Markku Salonen (Takso Ohjelmistot

Oy) (left) and the present editor-in chief Henrik Holm-

berg (right), who will retire in summer 2017.

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Marieholm tunnel, Gothenburg, SE

Norvik Hamn, dredging at Nynäshamn, SE

Renewal of erosion slabs at K4/K5 quay, Kapellskär, SE

Lillmälö-Prostvik Ferry Harbour, Parainen, FI

Pre-construction of Hernesaari cruise ship quay, Helsinki, FI

Koirasaari foundations, ST1 Helsinki, FI

Dredging at Hanhikivi, Pyhäjoki, FI

PK-3 quay, Hamina, FI

Jouko Sederholm

Peter Piek

Marko Saarelma

Marko Saarelma

Jouko Sederholm

Esa Kunnassaari

Jouko Sederholm / Gert-Jan Peters

Marko Saarelma

Juhani Naukkarinen

Olli Väätäjä

Matti Juslenius

Markku Sollo

Markku Pöyhönen

Arto Kontio

Reijo Kultalahti

Matti Juslenius

DID YOU KNOW?

In Boskalis Nordic Today articles, we often mention the

fl eet and equipment we use in various projects, for example

dredgers, barges, drilling rigs, work pontoons, tugs and

cranes. You can learn more about our marine construction

fl eet and equipment on our website. Informative leafl ets in

PDF format, providing technical data, specifi cations and

illustrative graphics, have been prepared on all of our fl eet

and equipment units.

You’ll fi nd our fl eet and equipment leafl ets on our

website via the menu:

WWW.TERRAMARE.FI > ABOUT US > FLEET AND EQUIPMENT

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WORK SITE PROJECT MANAGER SITE MANAGER

BOSKALIS AREA NORDIC´S WORK SITES TODAY

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Boskalis Area Nordic executes large and technically

demanding projects reliably and effectively.

MAIN ACTIVITIES

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7.

MAP OF WORK SITES TODAY


DREDGING AND RECLAMATION•

UNDERWATER DRILLING AND BLASTING•

PORT AND HARBOUR CONSTRUCTION•

CONCRETE SLIPFORM CASTING•

ENVIRONMENTAL CONSTRUCTION•

SPECIAL PROJECTS•

OUR COMMON WEBSITE: WWW.BOSKALIS.COM/NORDIC

WISHING YOU A SUCCESSFUL START TO 2017

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BOSKALIS AREA NORDIC | WWW.BOSKALIS.COM/NORDIC

boskalis area nordic | information magazine no. 02 / …€¦ · the functioning of the core...

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