TUNNEL COVERING WORK METHOD, TUNNEL COVERING STRUCTURE, AND TUNNEL COVERING BODY

摘要

PURPOSE: To increase workability significantly by eliminating forms for applying concrete and reducing related work, by eliminating assembling and installation of concrete reinforcing bars and by reducing competitive work at working faces, and provide possibility of making the thickness of concrete covering layer smaller and possibility of free selection of type of concrete to be used. ;CONSTITUTION: A work covering metal body 1, is used in which the inner form surfaces of a metal form 2 made of steel material or the like are closed with metal plates 3 made of iron or the like. The work covering metal body is attached to a skin plate 22 of a shield excavator, and a concrete filling portion 24 is formed by closing the outer open surfaces of the work covering metal body with the skin plate. The concrete filling portion is filled with concrete, and the shield excavator is driven so as to open the concrete filling portion and supply concrete into natural ground with pressure.;COPYRIGHT: (C)1993,JPO&Japio