A pair of UTAS RRAPs from TPA’s Rapid Rail Access division were lifted into position by a track side 360 excavator at the approved access point of 225m 41ch. The system was staggered over both lines which gave the Super Rod team perfect control over the OTP to reverse directly onto the track.
The team accessed the up line and vactor removed all debris within the catchpits and pressure jetted all lines clear. The connecting pipes contained 90% silt and a heavy root content. Where the cess drainage merged into the 6ft before travelling through the tunnel, there was a heavy calcite content that required significant pressure jetting.
Upon exit from the tunnel, the drainage flowed down the 6ft through the station. Before exiting the station, one run between catchpits was partially collapsed, and although Super Rod managed
to clear this to aid the flow, further work is required. In addition, upon exiting the station, the system was lost under the 6ft ballast but the team managed to locate several buried catchpits which were cleared and proved.
The outfall was then located at a distance of 60m, travelling from the system within the 6ft under the tracks and out to an overgrown culvert that requires third party access to clear and prove on further works.
The system was left clear and flowing, with the outfall functioning, but further work is required. The flooding within the cess and 4ft was cleared.
