RELIEF POINT SYSTEM AND ITS INSTALLATION METHOD FOR TREATMENT OF UPLIFTING WATER PRESSURE AFFECTING UNDERGROUND STRUCTURE

摘要

PURPOSE: A device for damping lift for an underground structure and a method of constructing the same are provided to limit lift of groundwater by storing and externally discharging the groundwater in/from a water tank in a natural drain way due to head difference of the groundwater. CONSTITUTION: A device for damping lift for an underground structure comprises a water tank(10), a spacer(20), a PDD pipe(30), an ring(40), a T socket(50) and an end cap(52). The water tank comprises a plurality of holes(11), which are formed below a given length from the upper end of the water tank. Aggregate(12) is filled in the water tank. The spacer divides the inside of the water tank into a lower part with the hole and an upper part without the hole. The space comprises a plurality of through holes(21). Non-woven fabric is installed inside and outside the PDD pipe. The ring is installed between the upper part and hole of the water tank to keep airtight.