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Haruna Tunnel

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Railway tunnel in Honshu, Japan
Haruna Railway Tunnel
Haruna Tunnel on Joetsu Shinkansen
Overview
LineJoetsu Shinkansen
LocationTakasaki – Shibukawa
Coordinates36°31′7.9422″N 138°58′16.446″E / 36.518872833°N 138.97123500°E / 36.518872833; 138.97123500
Operation
Opened1981
OperatorJR East
CharacterPassenger and freight
Technical
Line length15,350 m (50,360 ft)
Map of Jōetsu Shinkansen line.

Haruna Tunnel (榛名トンネル, Error: {{nihongo}}: transliteration text not Latin script (pos 1) (help)) is a tunnel on JR East-Joetsu Shinkansen line in Japan that runs from Nakazato-cho, Takasaki city to Kawashima, Shibukawa city, in Gunma prefecture with approximate length of 15.350 km. It was completed and opened in 1981.

Excavation was extremely difficult due to the poor geology consisting of volcanic mud flow sediments and water inflow reaching a maximum of 110 t/min, so injection, two-stage silot, and pressurization methods were used in combination. The discharge of tunnel water also affected the ground surface, causing a decrease and depletion of well water, irrigation water, and surface water. In addition, on July 20, 1978, a 30-meter-wide cave-in occurred in the Yamakoda area of Haibuto-Mura. The fields and the Arai-Shimomurota line of Gunma Prefectural Road No. 154 were engulfed, and a large amount of earth and sand flowed into the tunnel directly below (Shimo-Arai construction area).

See also

References

  1. "榛名トンネル(15,350m)". Touring JP website (in Japanese). Retrieved 12 October 2023.
  2. Haruna Tunnel 30 meter hole in the ground, 11 families evacuated, landslide 75 meters underground "Asahi Shimbun" 1978 (Showa 53) July 18 morning edition, 13th edition, page 7
  3. "Haruna Tunnel". Techno treasure reports (in Japanese). Retrieved 12 October 2023.
  4. "Excavation of unconsolidated water-containing layer in Haruna-Nakayama Tunnel". CiNii article report. Retrieved 12 October 2023.
  5. 「上越新幹線工事誌 大宮・水上間」昭和58年10月
  6. トンネル 地面のむ 30メートルの穴 11世帯避難 地下75メートルで土砂崩壊『朝日新聞』1978年（昭和53年）7月18日朝刊、13版、7面

External links


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