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In recent years, the effective utilization of the underground space using rectangular pipe such as underpass and barrier-free underground passageway is being promoted in urban areas. As an effective c...onstruction method in urban areas, the box culvert construction is being carried out these days. Additionally, it is required to apply the large section pipe jacking method of box culvert under the low earth covering because of the proximate structures and topographical conditions. However, the effects on surrounding ground and surface have to be considered with carefully when these structures are constructed in shallow depth. For mitigating these influences, application of the upper semi-section excavation method is expected. However, the influence of the construction method on the surrounding ground has not been clarified because there are few construction examples of the method. Therefore, three-dimensional finite element analysis was carried out to clarify the behavior of the surrounding ground during the construction of the upper semi-section excavation method. This study discusses the effects on the behavior of surrounding ground with the upper semi-section excavation method by means of numerical analysis.続きを見る
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