卵石通过闸、坝下泄时,具有滑动、滚动、跳跃等运动形式,甚至跳出水面.它们对建筑物有很大的破坏作用.一般说来,它们对建筑物的破坏有磨损和撞击两种形式.其破坏的程度取决于卵石特性、水流条件、建筑物形式和材料等多种因素.卵石向前行进时,呈明显的带状,因而它们对建筑物的破坏在横向上是不均匀的.在对建筑物采取抗磨防护措施时,应重点保护受破坏最严重的部位.在设计中应考虑为维修提供方便,以免陷于被动. Pebbles through the gate, dam discharge, with sliding, rolling, jumping and other forms of movement, and even jump out of the water. They have a great role in the destruction of buildings. In general, they damage the building there are two forms of wear and tear The degree of damage depends on a number of factors such as pebble characteristics, water flow conditions, building form and materials, etc. Pebbles show a pronounced ribbon shape as they travel forward so that their damage to the building is laterally non-uniform. Wear protective measures in the building should focus on protection of the most damaged parts in the design should be considered for the maintenance of convenience, so as to avoid being stuck in the passive.