Longitudinal Cracking in Pipes
Longitudinal cracks are splits along the length of a pipe. These types of cracks occur most commonly in large diameter pipes ( e.g > 200 mm).
- internal pressure, in the case of rising main,
- loads due to soil cover or external loading such as heavy vehicular loads.
Longitudinal Cracking in Roads
As with other sealed road failure modes there are two main attributes taken into account when measuring longitudinal cracking; extent & severity.
Longitudinal Cracking can occur for a number of reasons, including;
- the reflection of a crack or joint in the road pavement,
- poorly constructed joints in the asphalt surface;
- asphalt hardening,
- diurnal temperature fluctuations.
Where a number of parrallel cracks exist, this may be the result of;
- an expansive clay sub-grade,
- a cyclical weakening of the pavement edge,
- differential settlement between cut & fill.