In order to investigate the coupling effect between the projectile deformation a nd the target, the mushrooming deformation of the projectile impacting on a defo rmable target was theoretiallly analyzed by taking into account the penetration of the projectile into the deformable target.

This article makes an exploration of urban flyover and elevated design schemes which emphatically explains how to carry out the design of the type of pier columns and that of continuous box girder sections when the bridge landscape is under the condition of being restricted,which provides reference to the bridge scheme design in the future.