FIELD: construction engineering. SUBSTANCE: this relates to construction and operation of underground objects located below level of ground water. According to method, ground water is withdrawn by means of pump provided with suction and delivery pipes. Water is taken from perforated pipes connected through suction pipes to pump. Lowering of ground water level is carried out inside underground structure from every layer separately with subsequent removal of dewatered layers of ground. Bottom of underground structure is constructed after placing perforated pipe on crushed-stone base below structure bottom level. Pump through non-return valve withdraws water until completion of bottom construction, erection of partitions up to their complete waterproofing from ground water head pressure. End of pump suction pipe is located above level of ground water. Pump is disconnected from suction pipe. Perforated pipe is left in medium of ground water below structure bottom. Suction pipe of pump together with remaining ground water in it is embedded in body of underground structure leaving free upper outlet ring of pipe provided with gate valve with possibility of connecting pump to it for withdrawing emergency high ground water. Device is provided with suction and delivery pipes, perforated pipe which is connected through non-return pipe with lower end of suction pipe. Suction pipe is embedded in structure body. Upper end of suction pipe is located above ground water level with possibility of its waterproofing and of connecting to pump gate valve. Perforated pipe is located horizontally below level of bottom of underground structure along its entire length in medium of ground water. Application of aforesaid method and device enhances efficiency and reliability of artificial lowering of ground water level in construction and operation of underground structures located below ground water level. Also prevented is displacement from ground of already erected and operated underground structures by pressure of emergency high ground water. EFFECT: higher efficiency. 4 cl, 5 dwg, 2 ex
