Normally use of thrust ...

Normally use of thrust blocks is the age old solution to centrifugal forces on water mains.

But Batter piles may be an option in exceptional cases like poor soils with or without high water table, soil conditions of low shear strength etc.,in which case they need to be anchored properly with proper alignment to take up the forces on them. Bearing piles may be preferred to friction piles. Conditions of negative skin friction need to be totally avoided.