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Home > LTA to look at un-manned tunnel inspection

LTA to look at un-manned tunnel inspection

Tris Thomas

Written by Tris Thomas on 02/03/2017 in News

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Singapore’s Land Transport Authority (LTA) has issued a Request for Information (RFI) to seek the industry’s participation in the use of Unmanned Aircraft Systems (UAS) and Unmanned Vehicle (UV) technology for MRT and road tunnel inspections.

Participants of the RFI are invited to design and develop suitable trials based on UAS technology to conduct automated inspections in MRT tunnels. They can also develop trials involving UAS, UV or other technology for the inspection of road tunnels. The trials should incorporate 360-degree video mapping of the tunnels, as well as software to automatically detect defects from the video taken and provide their location.

Through the RFI, LTA will evaluate the feasibility and effectiveness of leveraging such technologies in the routine inspection of tunnels.

Currently, manual inspections are carried out regularly within our rail and road tunnels to detect anomalies, such as cracks or water leakage. LTA’s road tunnel inspections also cover rainwater storage tanks and voided slab spaces where utility lines are located. These checks allow LTA to ascertain the health of the tunnel structures so that necessary maintenance can be carried out. Such checks are, however, labour intensive, as they require workers to physically comb the tunnels. The inspection of rail tunnels is even more challenging as workers can only do so within a very limited number of hours at night, after passenger service ceases.

The use of automated technologies such as UAS and UVs will not only improve the accuracy of inspections, but will also free up engineers’ time, enabling them to focus on the analysis of the data captured to recommend any necessary remedial measures.

This RFI expands on LTA’s proof-of-concept trials at ten Thomson-East Coast Line sites, where UAS are being deployed to monitor work progress by taking aerial photographs and videos. These new trials will help to further current research developments and validate UAS and UV technologies under demanding operational conditions. If found effective, LTA aims to fully deploy these technologies for tunnel inspections in the next five years.

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