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List of products by author: T. Nagao
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Construction of highway tunnel with the renovation of the railroad viaduct
Abstract: This paper reports the construction of an underground structure by underpinning where the Tokyo Gaikaku Expressway crosses under the railway viaduct of the JR-Sobu Line without affecting train operation. A large-scale box culvert was immersed on both sides of the existing railway viaduct by pneumatic caisson method. In addition, the box culverts were used as foundations for piers which...
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Development of the New Propulsion Method for Construction of a Small Section Underground Structure While Cutting the...
Abstract: This study proposes a new construction method for constructing a small section structure under railway tracks by non-open cut method.This method has the following 3 characteristics; 1) Ground surface displacement is reduced by a ground cutting wire saw in front of the cutting edge. 2) Attitude control jacks between the cutting edge and precast concrete boxes achieves detailed excavation...
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