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Rock excavation for underground power station at Takamaka (Reunion)
Local geological formation comprise irregular piling of diverse quality basalts; stability of excavation measuring 54×9.5×20 m height was ensured by herringbone-cutting for vaults and wedge-cutting for core, and appropriate support of walls in decomposed basalt by use of plastic-sealed anchor bolts at excavation bottom, together with expanded metal panels; work required installation of 3000 bolts with total length of 10,500 m, and 2500 sq m of expanded metal panels.
Rock excavation for underground power station at Takamaka (Reunion)
Local geological formation comprise irregular piling of diverse quality basalts; stability of excavation measuring 54×9.5×20 m height was ensured by herringbone-cutting for vaults and wedge-cutting for core, and appropriate support of walls in decomposed basalt by use of plastic-sealed anchor bolts at excavation bottom, together with expanded metal panels; work required installation of 3000 bolts with total length of 10,500 m, and 2500 sq m of expanded metal panels.
Rock excavation for underground power station at Takamaka (Reunion)
Execution des deroctages de la centrale souterraine de Takamaka (La Reunion)
Francou, J. (author) / Loze, G. (author)
Construction ; 22
1967
9 pages
Article (Journal)
French
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