トンネル掘削にともなう内空変位の予測 : 第三白坂トンネルNATM試験施工

概要

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It is one of the most important problem for tunnel construction to estimate the final amount of rock deformation. This paper deals with the estimation of the final amount from the mount of deformation in the earlier stage of measurements at Dai-Sau-Shirasaka Tunnel which is under construction with the New Austrian Tunnelling Method. We have distinctly found that the rock behavior after excavation is constituted with viscous and plastic-elastic deformations in adopting new measurement method described in this paper. Rock deformation U can be expressed by the following equations, U=U_v+U_<EP> U_v=a・t U_<EP>=C(1-e^<-D・L>) where, U_v : viscous deformation U_<EP> : plastic elastic deformation t : elapsed time after blasting L : distance between the observation point and tunnel face a, C, D : constants
一般社団法人日本応用地質学会の論文
1979-09-30