Construction Method for Lower Part Work of Ballast Bed in Overhaul of OCS

This paper brings on a construction scheme for ballast bed section during the replacement of OCS mast with the references of overhaul of OCS in Beijing-Baotou line; the re-excavation on the former foundation shall be done at first without taking away the mast, then the re-excavated foundation shall be filled with C20 swelling concrete. When it has been reaching to the designed strength after sufficient curing, then the mast can be taken away completely. After the new mast and supports have been re-mounted, the cast of concrete in 100 mm can be completed as the surface layer of the foundation.