The railway vehicle is used for repairing the faults in current railway subgrade face. It can be used for gravel track spacing, wired or 4 m and more than double track or line of the assignments section of roadbed surface,it can finish the following procedure in one flow path:digging the old ballast in the upper of the roadbed, and bring them to metal seperation and recycling; Mixed sand material and control its water content; digging the rest trackbed and roadbed upper; Flat top subgrade; Laying the corresponding protection object, such as geotextile, polystyrene plate and so on; laying sand mixed material and solidified so that to form protective layer of roadbed surface.

Main Technical Parameters:

Overall length:about 105m 

Width:3.1m 

Height:4.65m

Gross weight:about 400t

Drive: hydraulic motor drive two axle gearcases with 4-axis bogies

Maximum operating speed of oneself:20km/h(carrier vehicle without materials)

Unite and hang: 100km/h

The design speed of diging ballast and filling in the sand mixture:80m/h

The largest thickness of paving sand every time:0.5m

Max. digging width

Ballast digging:4m

Roadbed digging(without level adjustment):4.05～6.6 m

Max. digging depth(from railway surface)

Ballast digging:1.0m

Roadbed digging:1.2m

Min. working curve radius(superelevation of 0.15m):230m

Minimum curve radius:150m