Please enable JavaScript.
Coggle requires JavaScript to display documents.
TrackHatem (Inspection & Tolerance (Tolerance (\(T_V\) Target value…
Track
Hatem
Inspection & Tolerance
Inspection
-
Mainline
- Accompanying track recording run
-
-
Tolerance
\(T_V\)
- Target value after renewal or scheduled maintenance
\(A_V\)
- Action value. Correction required shortly to avoid reaching speed restriction value
\(S _{RV}\)
- Speed restriction value. Speed restricted to a proposed 5 km/h to preserve track parameters and guarantee safety of commuters
Fastening system
- For ballasted and ballastless (plinth) track
- For embedded track, a visual inspection of top surface of track fastening is to be performed. Open cracks of maximum 3mm thickness could be treated with QT FIX, for a maximum depth of 150mm
Quality levels
T
- Incorrectly tightened fastening
Anchor bolt nut loosened and insulating bush inadequately tightened onto the base plate.
I
- Inoperative fastening
No fastening or the tightening effect of the fastening is nil (For example, the anchor bolt has become loose or spring is broken)
C
- Correctly tightened
Anchor bolt nut evenly pressed against the insulating bush. Bush properly tightened and making contact with base plate. Anchor bolt properly sealed in its support
C
- Correctly tightened
Clip property positioned and tightened onto the foot of the rail.
T
- Incorrectly tightened
Clip inadequately positioned and only in contact with the foot of the rail at one end of the clip. Substantial wear of the clip ends.
I
- Inoperative fastening
No clip or it has no tightening effect. Clip broken etc.
Tolerance
\(T_V\)
- C > 90%
- I = 0%
At maintainance stage, I is allowed upto 5%
-
-