Took a trip down to Frankston yesterday to see what's happening.
At Cheltenham the land on the west (Up) side of the line has been cleared. Houses have been demolished between Churchill Ave and Park Rd (at the north end), and a bunch of shops between Charman Rd and Bladgon St (at the South End). The car park and access road that used to be between the station and the cemetery has been ripped up. The keepers cottage at the cemetery is untouched, as is the station itself. The car parks on the Down side of the station on either side of Park Rd are being used (partially) as works depots. My guess is that they will close the station, demolish it, and build temporary tracks on the Up side of the current station while digging on the current alignment.
The pedestrian footpath that used to parallel the line on the Up side south of Cheltenham is closed and is being dug up.
Work at Mentone doesn't seem to be as advanced, and seems to be limited to clearing vegetation and car parking south of the station to Warrigal Rd on both sides of the line. A big works depot has been established on the old car park on the Down side of the line (the former goods yard.)
Work on the grade separations at Edithvale and Bonbeach is limited to putting up signs on the fences saying that grade separation is coming.
At Carrum (for those that don't know) a temporary line has been provided on the Down side between the Up side of the old level crossing and Eel Race Rd. The abutments at each end of the new rail bridge are nearly completed. Almost all of the piers have been constructed, with the exception of four in the vicinity of the new alignment of the road crossing. They are still working on the foundations of these piers - the spans involved seem to be longer than the rest, so, presumably the foundations are more involved. South of the missing piers, most of the spans have been erected (lacking about five at the extreme south end), together with what appears to be about half of the platform deck.
The spans at Carrum are different to those used on the Caulfield - Oakleigh section. These are formed from two beams - a right and left half that span the complete distance between two piers. Each beam is a moderately complex shape - a portion of the floor of the box girder, a vertical wall of the box girder, a portion of the floor of the track box, and the vertical wall of the track box. After the beams are erected, the remaining metre or so of the floor of the box girder (and probably the bottom of the track box) are cast in situ. No doubt this construction reflects the lifting capacity of the cranes.
One of the latest style of substations is being constructed on the Up side of the line immediately north of Eel Race Road. (This is the style that is mounted on a steel frame about a metre above ground level.)
Resignalling work is being carried out south of Eel Race Rd. Not surprisingly, axle counters are being installed.
A new works depot has been erected south of Seaford station on the Down side of the line. This probably replaced the depot at Carrum, which, of course, has been demolished.
As has already been reported, a new stabling siding has been provided on the Down side of the line north of Kananook. This pretty much extends from Seaford Road to beyond the Down end of Kananook platform, and will eventually form the access track for the new depot at Kananook. At the moment, six 6 car sets can stable in the track. The siding is connected to the Down line at both ends, with a crossover at each end to the Up line. The siding was brought into service during the shut that demolished Carrum. The siding is worked from Frankston.
Work on the bigger stabling stabling sidings at Kananook is limited to earthworks - judging by the number of pipes and pits stacked around they are still doing drainage work.
A new substation has been constructed on the Up side of the line north of the Wells Rd bridge.
The new station building at Frankston is certainly looks impressive. The roof of the building must be about 8 metres up, with a skirt about half this height all the way around the edge. This leaves a huge gap between the bottom of the skirt and the platform, which must be completely rain swept in a strong southerly. Fortunately they're not at all frequent in Melbourne in winter.