(19)

(11)

EP 2 064 392 A1

(12)

(43) Date of publication: 03.06.2009 Bulletin 2009/23 (21) Application number: 07808322.7 (22) Date of filing: 19.09.2007

(51) International Patent Classification (IPC):  E02D 17/04(2006.01) (86) International application number: PCT/KR2007/004532 (87) International publication number: WO 2008/035911 (27.03.2008 Gazette 2008/13)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR Designated Extension States: AL BA HR MK RS (30) Priority: 19.09.2006 KR 20060090611 26.02.2007 KR 20070019240 (71) Applicant: Young Chang Construction Co., Ltd Chungcheongnam-do 312-923 (KR)	(72) Inventor: KIM, Seongdeuk Daejeon 302-743 (KR) (74) Representative: Stolmár, Matthias et al Stolmar Scheele Hinkelmann Blumenstrasse 17 80331 München 80331 München (DE)