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Title:
BOREHOLE-DIAMETER-EXPANDING DRILL HAVING THE FUNCTION OF MAINTAINING THE SHAPE OF THE REAMED AREA IN THE GROUND, AND A PILE AND TENSION MEMBER CONSTRUCTION METHOD FOR BUILDING WORK USING THE SAME
Document Type and Number:
WIPO Patent Application WO/2012/067454
Kind Code:
A3
Abstract:
The present invention relates to a borehole-diameter-expanding drill which is used in order to expand the hole wall in part of a borehole shaft drilled in the ground for the purpose of building work, wherein there is a sliding blade assembly which comprises sliding blades capable of mutual folding, hinged to the shaft part of a rotor at the upper end thereof, and each of the sliding blades has secured to the upper surface thereof cutting bits for hole-wall cutting, and there is a movable member for controlling the upwards unfolding and the downwards folding of the sliding blades, and thus it is possible to subject part of the borehole shaft to reaming in the ground while maintaining the shape of the reamed area in the ground unaltered, and it is possible to form the securing and fixing part of an anchor or tension pile or else to form the spread foundation part at the front end of a compression pile by casting concrete into the reamed area.

Inventors:
YIM, Seong Dae (1 Sangin daeseong Skyrex Apt, Sangin1-dong, Dalseo-gu, Daegu 704-863, 704-863, KR)
임성대 (대구 달서구 상인1동 171-1 상인대성스카이렉스, 704-863 Daegu, 704-863, KR)
HYUN, Jae Ho (1011-8, Bongdeok1-dong Nam-gu, Daegu 705-830, 705-830, KR)
Application Number:
KR2011/008814
Publication Date:
July 26, 2012
Filing Date:
November 17, 2011
Export Citation:
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Assignee:
SAMIL ENGINEERING & CONSTRUCTION CO., LTD (4F 777-85, Waegwan-ri Waegwan-eup, Chilgok-gun, Gyeongsangbuk-do 718-805, 718-805, KR)
주식회사 삼일이엔씨 (경상북도 칠곡군 왜관읍 왜관리 777-85 4층, 718-805 Gyeongsangbuk-do, 718-805, KR)
YIM, Seong Dae (1 Sangin daeseong Skyrex Apt, Sangin1-dong, Dalseo-gu, Daegu 704-863, 704-863, KR)
임성대 (대구 달서구 상인1동 171-1 상인대성스카이렉스, 704-863 Daegu, 704-863, KR)
International Classes:
E21B7/28; E02D5/34
Foreign References:
JPS56492A1981-01-06
JP2006016913A2006-01-19
JP2008106426A2008-05-08
KR20100078632A2010-07-08
Attorney, Agent or Firm:
BAEK, Hong-Ki (Namsan-dong, Jung-gu543, Daegu 700-442, 700-442, KR)
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Claims: