WATER RETAINING FACILITY WITH MORE THAN ONE STORY

摘要

PURPOSE: A storage tank having a multi-floor structure is provided to collect foreign material flowing in with water to the center of a tank floor and to use a supporting column as a water storage space. CONSTITUTION: A storage tank having a multi-floor structure(100) comprises a tank and masonry structures. The tank is embedded underground and comprises an internal space for storing water. The masonry structures are piled up along the height direction of the tank from the bottom(112) of the tank in order to compart the internal space of the tank into multiple floors. Each masonry structure comprises a boundary plate(152), multiple inclined plates(162), and multiple supporting columns(172). The boundary plate is located in a boundary between floors and comprises multiple communication holes communicating floors. The multiple inclined plates guide water flowing from upper floors to lower flows through the communication holes. The multiple supporting columns are formed with the boundary plate in one body and are downwardly extended from the boundary plate. The multiple supporting columns comprises a hollow(174) for using water storage space.