PANDROL PANGUARD™ - Pandrol USA
PANDROL PANGUARD™ - Pandrol USA
PANDROL PANGUARD™ - Pandrol USA
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PANGUARD <br />
Suitable Applications<br />
Applications of <strong>Pandrol</strong> PANGUARD make use of the product’s unique characteristics. Its low overall<br />
height makes it very suitable where lower stiffness is required in existing track, but the rail head level<br />
cannot be raised. The very high level of vibration attenuation achieved with the system can be used to<br />
control ground vibration – for instance from trains running in tunnels, or to reduce the noise emitted from<br />
vibration of structures such as bridges or viaducts. Examples of two applications are given below – one<br />
in which a primary objective was control of ground vibration and the other in which it was used to<br />
investigate the system’s capacity to reduce noise from a bridge.<br />
Case Study 1<br />
London Underground, UK<br />
Installation of <strong>Pandrol</strong> PANGUARD on concrete ties in place of wooden ties with baseplates.<br />
The installation was intended to reduce groundborne vibration from tunnels.<br />
Rail Spacing Axle Load<br />
BS113A 0,9m 11 tons<br />
Invert Vertical Vibration<br />
90<br />
87.3<br />
Vibration velocity dB (ref. 5E-8m/s)<br />
80<br />
70<br />
60<br />
50<br />
40<br />
Before<br />
After<br />
69.7<br />
Insertion Loss – 17.6 dB<br />
Note - Bars show total<br />
vibration levels<br />
30<br />
50 100 200 500 1000 2000<br />
Frequency (Hz)
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