Case Study
Toranomon Hills Mori Tower,
Tokyo (JP)Vibration suppression for once-ina-century construction project inJapan

Decoupling at the source of theinterference: Providing bedding fora four-lane underground urban
motorway

Vibration-related internal construction
measures for a 247 m high-rise complex with tunnelling below

Decoupling of a Four-Lane Urban
Motorway and a 247 m Tall Tower
Standing above it

Project description

The Getzner solution

In the centre of Tokyo, on a site co­vering a total area of about 6,000 m2,a prestigious multi­function area wasbuilt; the centrepiece of this develop­
ment is the Toranomon Hills MoriTower, a high­rise around 247 m inheight with 52 floors, which is set tobecome the tallest building in Tokyo.

Full­surface bedding of a four­lane
urban motorway

irectly beneath this structure
the planners designed a fourlane underground urban motorway –a new main traffic artery for getting
across Tokyo. To enable this impressive skyscraper to be built to therequired usage standards, a solution
had to be found for the vibration
produced by the urban motorway,
which runs through a tunnel for some200 m. The Tokyo Metropolitan Government selected the Japaneseproperty company Mori Building as
its partner for this major publicprivate sector project. Mori in turnengaged Getzner as its specialist partner for vibration isolation.

DGetzner has developed vibration protection for two significant subpro­
jects: an elastic solution for the hotelon the uppermost floors of the high­rise complex and a solution for theurban motorway running directly underneath the building.

the building. The building is thus effectively protected against unwantedvibrations.

he first implementation phase ofthe project involved applying aresilient bedding to the 200 m
underground length of motorway. The
full width of this section was beddedon the high-tech Sylomer®. This has
the effect of providing the structure
erected above the road with effective
and long-term protec tion againstvibration. The solution directly addresses the cause of the vibration, as
the four-lane urban motorway, whichis the source of the disturbing structure-borne noise, has now been isolated. The elastic bedding decouples
the source of disturbance from its
surroundings, and thus also from thestructure erected over it.

TProtecting outstandingarchitecture
In the second implementation phaseof the project, a variety of internal
vibration-damping construction
measures for decoupling the hotelthat occupies the upper floors of thetower are being carried out. In orderto protect this sensitive area in thebest possible way against vibrations,Getzner is bedding the hotel floors,
the pool areas and the fitness andmachinery rooms of the hotel on
Sylomer®. This prevents structureborne noise from spreading throughThe project goal, which was toprovide the maximum qualityof life and work by reducing
vibration and noise, has beenachieved.

FeedbackVibration experts on site
Getzner also assumed responsibility
for overseeing the installation process. „On a project of this magnitude
it is not only very important to work
closely with our Japanese partners,
one really needs to be on site oneself,
as only then can we constantly
monitor the quality of the work andensure that our materials protect thissuperb architecture in the long term.
For Getzner, this order is a valuablereference for future projects all overthe world“, is how Werner Ebster,
project manager at Getzner, underlines the importance of this major
project.

The advantages of theGetzner solution

What do our clients have to say
about the project?

— Sylomer® performs extremely wellin the long term
— Expert, well-informed contacts
on site— Material is easy to handle andto install— Getzner‘s experience spans
decades and has been gained
across all sectors— Overseeing construction— Comprehensive documentation— Excellent price/performance ratio

nstalling Sylomer® mats has theeffect of reducing noise andvibration. The material has been employed successfully for decades –Getzner has demonstrated this on
numerous occasions in the rail sector.
Another important criterion forfuture-oriented urban planning is thatthe material should be easy and quick
to install.

I

Toru Tsuchihashi,
Deputy General Manager,
Mori BuildingFacts and figures at a glance
Project Toranomon Hills Mori Tower in Tokyo (JP)Key facts:
Location:
Project coordinationin Japan:Owner:
Carriageway solution:
Hotel solution:
Elastic bedding:
Execution:

Tallest building in Tokyo (247 m, 52 floors)
Loop Road No. 2 (trunk road from Shimbashi to Toranomon)
Nihon Getzner K.K. und Getzner Werkstoffe Bürs
Mori Building
Full-width elastic bedding of a four-lane carriageway
Hotel floors, pool complexes plus fitness suites and machinery rooms
underlaid with Sylomer® bedding
Getzner Werkstoffe GmbH2014

Getzner Werkstoffe GmbH

Chief Executive Officer:
Employees:
2017 turnover:Business areas:
Headquarter:
Locations:

Ratio of exports:

1969 (as a subsidiary ofGetzner, Mutter & Cie)
Jürgen Rainalter
420
95.2 million euros
railway, construction, industry
Bürs (AT)
Munich (DE), Berlin (DE),
Stuttgart (DE), Lyon (FR),Amman (JO), Tokyo (JP),Pune (IN), Beijing (CN),Kunshan (CN), Charlotte (US)94 %AUSTRIA — Bürs GERMANY — Berlin — Munich — Stuttgart FRANCE — Lyon
JAPAN — Tokyo INDIA — Pune CHINA — Beijing USA — Charlotte— National Training Center, Tokio (JP)— Palace Hotel, Tokio (JP)— The Peninsula Hotel, Tokio (JP)— The St. Regis Hotel, Osaka (JP)— Pacifico Yokohama,Conference Center (JP)— Tokyo American Club, Sports Center (JP)— Kabukiza, Tokio (JP)— QVC Studio, Chiba (JP)— Toppan Rotary Printing Press, Osaka (JP)JORDAN — Amman
www.getzner.com

CS Loop Road K2 en © Copyright by Getzner Werkstoffe GmbH | 05-2018

Construction references (extract from Japan)
Founded: