MRT track cracks a second time in 2 months [image:Message 1 of 1 , May 20View Source
The MRT track has cracked a second time in 2 months.
A crack on the north-bound track between Somerset and Orchard stations caused delays during the evening rush hour last month.
On Sat afternoon (18 May), another crack was discovered by SMRT on the north-bound track between Braddell and Bishan station. The incident caused delays for commuters.
SMRT said engineers had installed G-clamps to secure the rail temporary. For safety, SMRT imposed a speed restriction of 18kmh on its trains at the cracked area.
The cracked rail was replaced by yesterday (19 May).
SMRT said it will carry out a full investigation to determine the root cause of the two rail crack incidents that occurred on the North-South Line.
It said that its preliminary findings revealed that both incidents bore several similarities. Both rail cracks occurred at rail joints that were welded between old and new rails by the same contractor in June last year and February this year.
SMRT said it will focus on the material, workmanship, stress factors, and welding process in its investigation. It will also identify, inspect and conduct tests on all rail joints that were welded by the same contractor.
SMRT did not reveal who the contractor was.
SMRT said it will also study the possible stress factors that may have contributed to the rail cracks.
To ensure that similar incidents do not occur again, SMRT said it will conduct a thorough inspection of all suspected rail joints on the entire network (North-South Line and East-West Line) and will take appropriate remedial actions.
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