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The London Crossrail project requires that re-radiated noise from the construction of the tunnels should achieve exceptionally stringent criteria with respect to groundborne noise and vibration. The challenge has been to implement robust vibration modeling for the movement of construction trains within the tunnel in order to derive noise levels wit...
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... measured data did not correspond to a modelled speed, a normalisation factor was applied to account for differences in construction train speed. The normalisation factors were determined by analysing the difference between predicted vibration levels at different speeds, as displayed in Figure 9. An analysis of the average differences observed between the measured and predicted groundborne noise levels was used to derive a number of calibration factors for the model. ...
Citations
... Clot et al. [11] extended this model to predict dynamic responses of a double-deck circular tunnel in full space. Parry et al. [12] verified the behavior of the pipelines in a software model of pipeline vibrations to determine ground noise and vibration levels above a construction tunnel. Yang et al. [13] used a centrifuge model experiment and numerical simulations to study the influence of changes in soil parameters with depth on vibrations caused by a tunnel. ...
Based on research on subway tunnels in a viscous soil medium, this paper establishes the vibration equation of a tunnel structure by using the theory of moderately thick cylindrical shells and the method of wave propagation. The soil around the tunnel is represented in simplified form as an isotropic viscoelastic medium to obtain the equation of motion of the soil, and the vibration control equation of the tunnel under the influence of viscous soil is obtained by coupling. By numerical calculations, the variation trends in the natural vibration frequency of the tunnel and attenuation affected by soil viscosity under different modes are given. Furthermore, the influences of the tunnel radius, wall thickness, and length on the vibration characteristics of a tunnel structure in viscous soil are discussed. This study will provide a reference for the design of subway vehicles and the antivibration design of subway tunnel structures.
... This paper extends ACCON's work with the Pipe in Pipe software, which we have previously utilised to predict vibration from underground construction trains on the Crossrail project [1]. The paper describes the vibration measurement and prediction method utilised to develop a reliable fast vibration prediction methodology for high speed trains travelling in tunnels, building on some initial published work [2]. ...
A further iteration of validation of the Pipe in Pipe software for high speed train vibration prediction has been carried out to extend the prediction methodology to high speed trains operating on the HS2 line in the UK. Vibration measurements were carried out at a number of locations above both bored tunnels and cut and cover tunnels on the HS1 line and European high speed railways for a range of train speeds. The aim is to extend the prediction methodology to the HS2 line which when operational would operate at speeds of up to 360 kph. The paper describes the measurement and analysis methods which were employed and the extent to which the software and methods developed can be relied upon for the prediction of vibration and groundborne noise.
... This paper extends ACCON's work with the Pipe in Pipe software, which we have previously utilised to predict vibration from underground construction trains on the Crossrail project [1]. The paper describes the noise measurement and prediction method utilised to develop a reliable fast prediction methodology for high speed trains. ...
The London Crossrail project required that re-radiated noise from the construction of the tunnels should achieve exceptionally stringent criteria with respect to ground-borne noise and vibration. The challenge has been to implement robust vibration modelling for the movement of construction trains within the tunnel in order to derive noise levels within sensitive properties. The Pipe-in-Pipe (PiP) software model has been modified and refined empirically utilising the measurement of exceptionally low vibration levels emanating from the temporary underground construction railway track.
