Reinforcement for Channel Lining

[PlasmaStruc]

To my knowledge I think it is essential to use reinforcement when lining a trapezoidal channel. Every guideline , code of practice I have referred, confirms it.
But I have seen many channel lining machines carrying out lining without reinforcement net. So is mass concrete OK for lining?
Can anyone explain this?

Thanks,

 

[cvg]

its not mass concrete but yes, many canals are lined with unreinforced concrete

 

[robyengIT]

are you sure it is not a fiber-reinforced concrete ??

 

[cvg]

fiber is often used in concrete canal lining, but I would still classify that as "un-reinforced concrete". For drainage channels which typically have much higher velocities than canals, I would recommend steel reinforcement