According to FIDIC ,Do we have EOT ;if there is increment in the quantities more than the original in contract? Please mention to the reference.

Yes EOT can be claimed if there is an increament in the quantities as compared to original contract.

Please refer to following Sub-clause in FIDIC

1) Sub-Clause-8.4 (Extension of Time)

2) Sub-Clause-.3 (Variation Procedure)

3) Sub-Clause-.1 (Contractor's Claims)