METHOD OF CONSTRUCTION OF SHEET PILING WHEN CONDUCTING WORKS AT MAJOR PIPELINE AND MOUNTABLE-DISMOUNTABLE SHEET PILING FOR DEVELOPMENT OF FOUNDATION PIT

摘要

FIELD: construction.;SUBSTANCE: invention relates to the construction, namely to sheet pilings or retaining walls erected at the sites with free-flow current of ground water, in particular for the creation of sheet piling in foundation pits during conduction of repair works at major pipelines. Method for erecting the sheet piling when conducting works at major pipeline includes the assembly of the guide frame and lock in place of erection of sheet piling by driving the racks, installation of the guide frame on them and driving of sheet piles of fencing with their closure in plan. Repair foundation pit is excavated preliminary and major pipeline is opened on top to the depth not less than 0.6 m from the bottom forming tube of major pipeline to the bottom of foundation pit, besides the foundation pit is excavated along the length exceeding the length of the cut section of major pipeline to not less than 2 m. Repair foundation pit is bordered with the compacted clay along the exterior perimeter. Four racks are mounted in the corners of repair foundation pit with section protruding over the curve of repair foundation pit to not less than 15 cm, retaining fingers are inserted into the holes of racks and then I-beams of guide frame are mounted on racks, after that the sheet piles with formation along the perimeter of guide frame from I-beams of sheet piling are suppressed into the soil along the I-beams between the walls of repair foundation pit and I-beam. Part of sheet piles leaves not less than 15 cm over the curve of the repair foundation pit.;EFFECT: technical result consists in the increase of productivity when erecting and disassembling the sheet piling, reduction of material consumption of sheet piling, simplification of structure.;5 cl, 3 dwg