METHOD FOR BORING A TUNNEL IN SOFT GROUND OR ROCK WITH A BORING EQUIPMENT HAVING A BORING HEAD - Patent 1078147

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EP 1 078 147 A1

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(43)	Date of publication:
	28.02.2001 Bulletin 2001/09

(21)	Application number: 99922647.5

(22)	Date of filing: 11.05.1999

(51)	International Patent Classification (IPC)⁷: E21D 9/00

(86)	International application number:
	PCT/NL9900/288

(87)	International publication number:
	WO 9958/818 (18.11.1999 Gazette 1999/46)

(84)	Designated Contracting States:
	BE DE GB NL

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Priority:

14.05.1998 NL 1009166

(71)	Applicant: HOLLANDSCHE BETON GROEP N.V.
	2280 AB Rijswijk (NL)

(72)	Inventors:
	VAN BERKEL, Robert, Hendrikus, Cornelius NL-3145 ND Maassluis (NL) VAN DE GRIENDT, Michiel, Adriaan NL-2807 PH Gouda (NL)

(74)	Representative: Jorritsma, Ruurd et al
	Nederlandsch OctrooibureauScheveningseweg 82P.O. Box 29720 2502 LS Den Haag 2502 LS Den Haag (NL)

(54)	METHOD FOR BORING A TUNNEL IN SOFT GROUND OR ROCK WITH A BORING EQUIPMENT HAVING A BORING HEAD