GROUNDWATER DISCHARGER FOR UNDERGROUND STRUCTURE

摘要

PURPOSE:To permit the discharging rate of groundwater to be regulated by a method in which one end of a groundwater intake tube attached to the floor of an underground structure is connected to outside and the other end is branched and connected to the upper and lower parts of a drain tank. CONSTITUTION:A drain tank 2 storing groundwater is provided inside an underground structure 1, and in the tank 2, a drain pump 3 and a low water-level float 4 and a high water-level float 5 to operate the pump 3 by detecting water levels are provided. The pump 3 is connected to an underground drain pipe 6, the end 7 of the pipe 6 is connected to the outside of the tank 2, and a groundwater intake pipe 9 is attached to the floor 8 of the structure 1. One end 10 of the pipe 9 is led to the outside, and the other end 11 is branched and connected with a switch valve 12. One branched pipe 13 is connected to the lower part of the tank 2 and the other branched pipe 14 is connected to the upper part of the tank 2.