Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Using impulse response testing to examine ballast fouling of a railway trackbed
Highlights The development of a new NDT method of quantifying railway trackbed. The application of Impulse Response (IR) testing to evaluating fouling of railway trackbed. Establishing a strong correlation between IR and ballast fouling related to the Ionescu Fouling Inndex.
Abstract The increase in freight and passenger rail travel has driven demand for more efficient and rapid investigation of railway trackbed ballast. One of the current approaches to evaluating the stiffness of railway ballast is to use a falling weight deflectometer (FWD). Whilst this is effective to establish overall track stiffness, it requires the rails to be unclipped from the sleepers – thus, it is very intrusive and expensive. The FWD technique does not measure ballast fouling. This paper focuses on using the impulse response (IR) testing method with a 12 lb instrumented hammer to excite a railway trackbed ballast composed of variously fouled ballast, with response measured using a geophone – in order to estimate ballast fouling. Finally, the impulse response results are successfully correlated with the assessed Fouling Index of the ballast.
Using impulse response testing to examine ballast fouling of a railway trackbed
Highlights The development of a new NDT method of quantifying railway trackbed. The application of Impulse Response (IR) testing to evaluating fouling of railway trackbed. Establishing a strong correlation between IR and ballast fouling related to the Ionescu Fouling Inndex.
Abstract The increase in freight and passenger rail travel has driven demand for more efficient and rapid investigation of railway trackbed ballast. One of the current approaches to evaluating the stiffness of railway ballast is to use a falling weight deflectometer (FWD). Whilst this is effective to establish overall track stiffness, it requires the rails to be unclipped from the sleepers – thus, it is very intrusive and expensive. The FWD technique does not measure ballast fouling. This paper focuses on using the impulse response (IR) testing method with a 12 lb instrumented hammer to excite a railway trackbed ballast composed of variously fouled ballast, with response measured using a geophone – in order to estimate ballast fouling. Finally, the impulse response results are successfully correlated with the assessed Fouling Index of the ballast.
Using impulse response testing to examine ballast fouling of a railway trackbed
De Bold, R. (Autor:in) / Connolly, D.P. (Autor:in) / Patience, S. (Autor:in) / Lim, M. (Autor:in) / Forde, M.C. (Autor:in)
27.11.2020
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Railway trackbed assessment using the GPR technique
| British Library Conference Proceedings | 2007