上越新幹線大清水トンネルにおける重力測定
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概要
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Dai-Shimizu Tunnel is the world-longest tunnel recently constructed for a bullet-train railway. Underground survey was conducted by two LaCoste and Romberg gravimeters G 210 and G 581 on June 4 and 5, 1982, This paper describes the outline of the gravity survey and the reduction procedures including terrain correction. The apparent density is determined as 2.04 g/cm<SUP>3</SUP> by using the gravity-elevation relationship. The Bouguer anomaly is closely related to the geologic structure of the region. A negative anomaly is located on a massive quartz-diorite which forms extensively the mountain range, and a positive one on basic rocks in the northern half of the tunnel.
- 日本測地学会の論文
日本測地学会 | 論文
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