
BCA to start independent investigations into Tanjong Katong sinkhole incident
'The investigation will examine the circumstances leading to the formation of the sinkhole, identify the root causes, and take the necessary actions against any non-compliance under the Building Control Act and Regulations,' BCA said in a media statement.
The agency said investigations could take several months, given the complexity of the incident.
'It will include detailed geotechnical analysis and other validation tests by BCA and its appointed consultants,' BCA added.
The sinkhole appeared along Tanjong Katong Road South on Saturday evening, causing a car to fall in. The female driver was rescued by workers and taken conscious to Raffles Hospital.
BCA said that since the incident, its engineers have been conducting round-the-clock site monitoring to ensure that surrounding buildings, roads and infrastructure remain structurally safe.
'As a precautionary measure, BCA had recommended that PUB implement a safety time-out for similar sewer construction projects across Singapore, and conduct a thorough review of current practices and safeguards at these worksites,' it added.
PUB said on Sunday that it called for a safety timeout to review similar sewer works.
It said works near the sinkhole involved the construction of a 16m-deep shaft connecting three existing sewer lines.
Providing a timeline of what happened, PUB said that a concrete component in the shaft failed at around 5.50pm on Saturday.
At around the same time, a sinkhole formed on the adjacent road.
PUB said it was still not clear what contributed to the failure of the component. "The shaft has been backfilled to stabilise the surrounding ground," it said on Sunday.
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