| 摘要 |
The present invention relates to an underwater installation method for a bridge pier using a working vessel which can exclude a cofferdam installation process. In order to exclude a process for installing a wide range of a cofferdam or a process for constructing a temporary bridge when an underwater structure is installed in water, a bridge pier, fabricated with a center pile, an upper plate, or a structure in a ground support station or a barge, is inserted and stood into a center pile placed in an underwater bedrock to be exposed through the surface of water using a carrier vessel and a badge equipped with a variety of equipment. Water leakage and floating of the bridge pier are prevented using a waterproof curtain. The bridge pier is sunk to the bedrock by removing soft ground from a base space, or the bridge pier is fixed on the bedrock by connecting the bridge pier with a plurality of piles and filing remaining spaces in the base space, an entrance space, and a center pile space with reinforced concrete. When an underwater structure is installed in a water path formed by the bridge pier, an arc-shaped water gate and the waterproof curtain installed on both sides of the water path can replace the cofferdam installation process. Remaining processes are completed on the upper plate or the structure assembled to the bridge pier, such that the cofferdam installation and disassembly processes are excluded. The overall process is performed by division of labor and cooperation, such that construction periods can be shortened and construction costs can be reduced. Tide or the flow of a river can be maintained in a construction period, and discontinuance of construction and environmental change can be minimized. |
