Construction method null of large passenger space under special

摘要

PURPOSE:To secure a constructing method for a large living space by means of a superplastic alloy by cladding this platelike fine crystal grain superplastic alloy to a mode enveloping a support frame via a superplastic diffused junction, pressing in a high temperature gas via an air hole secured in this envelope body, and inflating it into a globular shape. CONSTITUTION:Using a support frame 1 fabricated at a construction site as a mounting base, a platelike fine crystal grain superplastic alloy 2 is fabricated thereto, manufacturing an envelope body 3 forming a closed space. At this time, fabrication of this alloy 2 should be done as joining with one another, that is, it is by means of the so-called 'superplastic diffused junction.'. An air hole 4 is installed in the envelope body 3, a pressurized high temperature gas is fed to this envelope body 3, inflating this body 3 into a globular shape, and when it comes to a large space in size as desired, a supply of the high temperature gas is stopped, and recovery (6) of the high temperature gas and feeding (7) of low temperature gas are performed via the air hole 4, then cooling and superplasticity are completed. In succession, a gateway 8 is opened for completion.