SIDE SLOPE UNDERGROUND WATER DRILLING SELF-STARTING NEGATIVE PRESSURE DRAINAGE SYSTEM AND METHOD

WIPO Patent Application WO/2019/000776

A1

Provided is a side slope underground water drilling self-starting negative pressure drainage system, comprising a declination drill hole (1), a pipe boot (5), a water-permeable pipe (4), and a drainage pipe (8), wherein the drill hole (1) is divided into a water-permeable drill hole section (6) and a grouting seal drill hole section (7), a water-expandable water stop rubber ring (3) is provided between the two hole sections, the water-permeable drill hole section (6) comprises the water-permeable pipe (4), the top of the water-permeable pipe (4) is in contact with the water-expandable water stop rubber ring (3), and a cavity is formed in the water-permeable pipe (4); after passing through the water-expandable water stop rubber ring (3), a water inlet of the drainage pipe (8) is inserted into the water-permeable pipe (4); and cement mortar is filled into a gap between the drainage pipe (8) of the grouting seal drill hole section (7) and a hole wall. Further provided is a drainage method applying the side slope underground water drilling self-starting negative pressure drainage system.

SUN HONGYUE (CN)
SHANG YUEQUAN (CN)
FAN YUNHE (CN)
XU HUAN (CN)
SHUAI FEIXIANG (CN)
WANG DONGFEI (CN)
LV CHENGCHENG (CN)

PCT/CN2017/109459

January 03, 2019

November 06, 2017

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UNIV ZHEJIANG (CN)

E02D17/20

CN107246019A	2017-10-13
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CN102155016A	2011-08-17
CN103437354A	2013-12-11
CN201649106U	2010-11-24
JP2014206023A	2014-10-30
JP2015224470A	2015-12-14
JP2017095894A	2017-06-01

HANGZHOU QIUSHI PATENT OFFICE CO., LTD. (CN)

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