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M2 collapse ground investigation continues

Ground investigation work to establish the extent and cause of the ground collapse on the M2 near Sittingbourne continues today.

Roads minister Robert Goodwill visited site yesterday as Concept Consultants was setting up rigs to undertake cone penetration testing, ground probing radar and microgravity surveys.

The collapse was initially thought to have been caused by a solution feature in the Chalk but initial findings suggest that the collapse may have been caused by a backfilled dene hole.

New solution features have also appeared elsewhere in the chalk outcrop as a result of the recent heavy rain and has resulted in the evacuation of a housing estate in Hemel Hempstead and two others have been reported in Kent. These follow on from a ground collapse caused by a solution feature that swallowed a car in Walter’s Ash in Buckinghamshire earlier this month.

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