Extended Mass-Spring Systemfor use in Standing Water

Mass-Spring System XT –Solid and Efficient

Eficient vibration
protection
in standing water
The presence of standing water in asystem can impair the effectivenessof mass-spring systems. With its
mass-spring system XT, Getzner has
developed a vibration solution thatworks in the long term in standing
water – even if a drainage system
becomes blocked or is totallylacking.
n the rail sector, vibrations can be
reduced in a variety of ways depending on the requirements. Massspring systems are employed wherever the highest levels of protection
from structure-borne noise and vibrations are required. Getzner‘s fullsurface elastic bearings for massspring systems are highly eficient in
helping to protect buildings and residents living in the vicinity of railway
lines from the effects of noise andvibrations. However, in situations
where a mass-spring system has tofunction under the effects of water,
the elastic materials are playing aneven more important role in determining the success of the vibration
solution.

I

Systems that are full surface mounted on Sylomer® exhibit little change
in their natural frequency when exposed to water. However, if elastomers whose elasticity is dictated byshape are used, the natural frequency can change signiicantly. In extreme cases, this can result in system
failure.

Elastic bearing during normal
construction process
If there is any standing water in thevicinity of the bearing surface, themass-spring system XT provides thenecessary level of vibration protection. As an alternative to full surface
bearing – a combination of Sylodyn®
strip bearings and illers – Getznerhas developed a vibration solutionthat guarantees the highest level ofeffectiveness in the long term, evenin standing water. No deviations whatsoever from the normal construction
process are necessary. The vibration
protection is implemented in the usual “pour-in-situ” manner by direct
concreting, in other words without

the use of precast concrete elements
or iligree slabs. This particular solution not only effectively counteracts
the hardening effect of water ingress,
the “pumping effect”, it decouples thesuperstructure from its environmentand dramatically reduces the transmission of structure-borne noise andvibrations.
A system that is unique on themarket
In the case of the full surface massspring system XT, the combination ofmaterials achieves the desired effect:
the strip bearings are made of theproven Getzner material Sylodyn®,with special iller elements itted in

Execution of the mass-spring system XTSide bearing

Sylodyn ® -strip bearing
Filler elements

Munich underground line

the spaces in between. The effectiveness of the solution is essentially due
to the high-tech Sylodyn® material.
During the installation of the massspring system XT, the track slab iscompletely decoupled from its surroundings by additional side mats.
The specialised knowledge required
for this task has been acquired overdecades. We are unaware of any
other solution on the market thatachieves comparable results under
the same conditions.
Sustainable economic and effectivesystem
The materials developed by Getzner
are highly effective. The mass-spring
systems in particular have alreadyproven to be a sustainable economic
system worldwide. In terms of costeffectiveness, the mass-spring system XT can be compared with a fullsurface Sylomer® bearing. The effectiveness of this system is maintainedeven if a drainage system is blocked
or is totally lacking. The pumping effect, in other words the stiffening of
the system in standing water thatcannot drain away, does not occur
with this solution – or only to a very
limited extent. The effectiveness ofthe system thus remains reliable andpredictable, even in standing water.
Getzner‘s know-how offers security
One of the most striking features ofthis vibration solution from Getzner is

its simplicity: no special requirementsor changes to the construction process are necessary. Getzner will also
provide professional support during
the installation of the system. With
their extensive background in thisarea, the Getzner specialists become
vital partners: whether providing
advice in the planning phase, developing the best customised solution
or as project engineers or coordinators during the installation work.
The vibration specialist owns stateof-the-art equipped laboratories andspecial testing rigs, and also works
closely with a number of scientiic
institutions. The vibration solutions
are both technically and commerciallymature.

Construction benefits ofthe full surface mass-spring
system XT from Getzner— No deviation from the normal
construction process— Quick and easy to install— The system continues to function
even in standing water – e.g. whena drainage system is blocked or
is totally lacking— High-tech materials— Effective in the vicinity of a fullsurface Sylomer® bearing— A sustainable and economicalcomplete system for the long term
— Minimal maintenance required

Nottingham tram line

Reference projects from all over the world using elastic
bearings made from Sylomer® and Sylodyn® testify to theextensive experience of Getzner. The vibration specialist
has been providing professional support to its internationalcustomers for decades in reducing levels of structureborne noise and providing protection against vibration.

AUSTRIA — Bürs GERMANY — Berlin — Munich — Stuttgart FRANCE — Lyon
JAPAN — Tokyo INDIA — Pune CHINA — Beijing USA — Charlotte

International references
relating to mass-spring
systems for trams— Stuttgart— Barcelona— Berlin— Krakow— Le Mans— Madrid— Milan— Marseille— Nice— Nottingham— Paris— Rome— Vienna

JORDAN — Amman
www.getzner.com

TB MFS XT en © Copyright by Getzner Werkstoffe GmbH | 05-2015

Getzner projects speak for themselves