| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a construction method of an underground structure capable of shortening a construction period while reducing influence on surroundings and reducing or omitting lighting equipment and ventilation equipment further. <P>SOLUTION: The construction method of an underground structure is for constructing a new underground structure while demolishing an existing underground structure. By alternately performing a demolition process of constructing earth retaining 100 around the existing underground structure and then demolishing a part positioned on the top story in the remaining existing underground structure and a ring construction process of constructing outer peripheral rings 3,4,5,6 with openings 30,40,50,60 formed at the center part, which are the outer peripheral part of the new underground structure, inside a space formed by the demolition process, the outer peripheral part of the new underground structure is successively constructed from the top story while successively demolishing the existing underground structure from the top story, and after the demolition of the existing underground structure is ended, the center part of the new underground structure is constructed on the inner side of the openings 30,40,50,60 of the outer peripheral rings 3,4,5,6. <P>COPYRIGHT: (C)2012,JPO&INPIT |
