The work will affect trains on March 9.
Services will remain as usual on March 8.
We have compiled all the details on these works so that you can plan your journey this weekend.
Sunday (March 9):
Engineering work is taking place between Dartford and Crayford, closing all lines early on Sunday morning.
As a result, the 6.50am train from Dartford to London Charing Cross via Sidcup service will start from Crayford at 6.55am.
A replacement bus will run between Dartford and Crayford, starting from Dartford at 6.35am, earlier than usual.
This bus will connect with the amended train at Crayford.
Replacement buses will run between Rochester and Rainham, calling at all stations.
Sole Street Line: Trains between London Victoria and Ramsgate or Dover Priory via Chatham will only run between London Victoria and Rochester.
Additional trains will run between Rainham and Ramsgate or Dover Priory.
Highspeed via Gravesend: Trains between London St Pancras International and Ramsgate via Faversham will only run between London St Pancras International and Rochester.
Sidcup Line: Trains between London Charing Cross and Gravesend via Sidcup will be extended to run to and from Strood.