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Title:	Palomino HRT - Exploration drillings in two geological formations
Abstract:	The Palomino HPP, with an installed capacity of 80 MW, is under construction in the Central Mountains of the Dominican Republic. The geological investigations for the 13.53 km long headrace tunnel were highly restricted due to difficult access in the mountain areas, high tunnel overburden as well as precautionary environmental protections in the National Park José del Carmen Ramirez. With respect to the approximately 12.4 km long TBM drive an exploration programme was carried out during excavation, to detect fractured zones as well as the presence of pressurised groundwater in advance. Palomino HRT - Erkundungsbohrungen in zwei geologischen Gebirgsarten Im zentralen Bergland der Dominikanischen Republik wird das Wasserkraftwerk Palomino mit einer Nennleistung von 80 MW errichtet. Aufgrund der schwierigen Zugänglichkeit, der hohen Überlagerungen und der naturschutzbedingen Einschränkungen im Nationalpark José del Carmen Ramirez war die geologische Erkundung entlang des 13,53 km langen Druckstollens stark eingeschränkt. Für den etwa 12,4 km langen TBM-Abschnitt wurde, um Störzonen oder das Antreffen druckhafter Gebirgswässer im Vortrieb vorab zu erkennen, ein ausführliches Vorauserkundungsprogram konzipiert.
Source:	Geomechanics and Tunnelling 5 (2012), No. 1
Page/s:	67-71
Language of Publication:	English/German

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