Toranomon Hills Tower

In the centre of Tokyo, on a site covering a total area of about 6,000 square metres, a prestigious multi-function area was built. The centrepiece of this development is the Toranomon Hills Tower, a tower block around 247 m in height with 52 floors, which is set to become the tallest building in Tokyo. To enable this impressive skyscraper to be built to the required usage standards, a solution had to be found for the vibrations produced by the urban motorway, which runs through a tunnel for some 200 metres.

The challenges

Decoupling of vibrations for a once-in-a-century construction project in Japan
Decoupling at the source of the disturbance: bedding of a four-lane underground urban motorway
Vibration-related internal construction measures for a 255-metre high-rise complex with tunnelling below

The Getzner solution

The first implementation phase of the project involved applying a resilient bedding to the approximately 200-metre underground length of motorway. The full width of this section was «bedded» on the high-tech Sylomer® material. This has the effect of providing the structure erected above the road with effective and long-term protection against vibration.

The solution directly addresses the cause of the vibration: the four-lane urban motorway, which is the source of the disturbing structure-borne noise. The elastic bedding decouples the source of disturbance from its surroundings, and thus also from the structure erected over it.

Construction professionals discuss vibration isolation at a construction project featuring red isolation mats.

Advantages for the customer

The best-possible living and working conditions thanks to less vibration and noise
Full-surface bearing of a four-lane urban motorway
Long-term protection of outstanding architecture
Sylomer® performs extremely well over the long term
Expert, well-informed contacts on site
Material is easy to handle and to install
Getzner's experience spans decades and has been gained across all sectors
Overseeing construction
Comprehensive documentation
Excellent price/performance ratio

Installing Sylomer® mats reduces vibration and noise levels. The material has been employed successfully for decades – Getzner has demonstrated this on numerous occasions in the rail sector. Another important criterion for future-oriented urban planning is that the material should be easy and quick to install.

Toru Tsuchihashi Deputy General Manager, Mori Building