| 摘要 |
PURPOSE: A method for constructing a structure for excavation in the non-excavated underground is provided to easily perform grouting or cutting and connecting and welding between cut portions while maintaining a round form of large diameter pipes. CONSTITUTION: A method for constructing a structure for excavation in the non-excavated underground includes the steps of arranging a plurality of metallic large diameter pipes(1) horizontally to form a cylindrical shape or a rectangular shape, arranging small pipes or bricks(20) between the neighboring large diameter pipes, grouting upper portions of the bricks, cutting contact surfaces(30,30') of the pipes and connecting and welding the cut portions with metallic plates(40). A ring beam(2), which has the same inner diameter as the large diameter pipe by connecting a plurality of arc segments(3) of H-shaped or I-shaped beams, is mounted inside the pipes in a regular interval. The structure for excavation is constructed by the way of grouting, cutting and welding.
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