EXCAVATED SEDIMENT RECYCLING SYSTEM IN MUD TYPE SHIELD CONSTRUCTION METHOD

摘要

PURPOSE: To enable economical excavation work while making effective use of excavated sediment by performing the separating treatment of sand from sludge, the separation of clay and silt from excess sludge and the conditioning treatment of excess water respectively in primary, secondary and tertiary treatment plants, mixing treated soil and treated water appropriately in a recycling plant and also adding additive material to manufacture construction material, and conveying the construction material to a place for use. ;CONSTITUTION: In a primary treatment plant 20, sand is separated from sludge transported as a fluid. In a secondary treatment plant 30, clay and silt are separated from excess sludge after primary treatment, excluding mud to be circulated for recycling. In a tertiary treatment plant 40, excess water separated by secondary treatment is treated for conditioning. Further in a recycling plant 50, fed primary treated soil, secondary treated soil and tertiary treated water are appropriately mixed, and solidifying material such as cement, a stabilizer, and the like are added to manufacture construction material for shield work such as invert mortar and back-filling material. The manufactured construction material is conveyed by a conveying pipeline 70 and utilized effectively as construction material in a shield pit at a construction site.;COPYRIGHT: (C)1996,JPO