FIELD: formation of pipeline in ground. SUBSTANCE: working and receiving pits are excavated in ground and pilot hole is made over design axis of pipeline. Pilot hole is sealed, and its hollow is filled with gaseous agent under pressure up to appearance of void water on ground surface. Before expansion of pilot hole it is filled with fluid-flow finely divided material under pressure exceeding pressure of infiltration of finally divided material into ground. Then, pilot hole is expanded up to design diameter of pipeline with pilot hole filled with finely divided material, and walls of expanded hole are faced. EFFECT: higher efficiency. 6 dwg
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