| 摘要 |
PROBLEM TO BE SOLVED: To provide a construction method for underground structure that eliminates the need for erection of an underground piled column and construction of an underground column and achieves further labor-saving construction, and an underground structure.SOLUTION: An underground structure A is constructed through: an earth retaining wall construction process of constructing an earth retaining wall 2 on the foundation G so as to surround a construction area R of the underground structure A; a steel pipe pile installation process of installing a plurality of steel pipe piles 3 at predetermined positions of the foundation G in the construction area R of the underground structure A; a first-story floor skeleton construction process of building a permanent steel beam 10 connecting an end to the steel pipe piles 3 and constructing a first-story floor skeleton 13 by installing concrete; a foundation excavation/permanent beam installation process of installing the permanent steel beam 10 by using the first-story floor skeleton as a working floor and a short strut and also connecting an end to the steel pipe pile 3 for each underground-story layer, and excavating the foundation G for every underground-story layer using the permanent steel beam as a short strut; and an underground-story skeleton construction process of constructing an underground-story skeleton of each underground-story layer by using the steel beam 10 as a permanent beam and the steel pipe pile 3 as a permanent column. |
