Lateral ice force acting on a vertical cylinder

In general, forward directed ice force is only considered by the designer.But experiments prove that the lateral ice force caused by the uneven contact between ice sheet and the pile also exists.The lateral ice force does not object to normal or Gumbel distribution,and is not relevant to the forward directed one in numerical value.Preventive measures should be taken to avoid the damage caused by the lateral ice force to the structure in design phase.