Water-soluble sedimentation temporary support

The utility model relates to the technical field of bridge construction. The water-soluble settlement temporary support is used for temporarily supporting a beam plate in bridge construction and is characterized by comprising a supporting and jacking piece, a supporting seat piece and a settlement layer, the supporting seat piece is internally provided with the settlement layer, the supporting andjacking piece is supported by the top face of the settlement layer, and the settlement layer comprises a fine sand layer and an industrial salt layer. When the beam plate is installed, the elevationof the top plate is adjusted through the thickness of the settlement layer, when the beam plate is unloaded, water is injected into the fine sand layer and the industrial salt layer through the gap between the top piece and the supporting piece, industrial salt is dissolved in water to form salt-water mixed liquid, the supporting piece slowly settles along with dissolution of the industrial salt,and finally the top plate i