IMPEDED DRAINAGE DEVICE FOR UNDERGROUND STRUCTURE

WIPO Patent Application WO/2022/231074

A1

The present invention relates to an impeded drainage device for an underground structure, the device comprising: a drainage body which is inserted into a bored hole (core hole) formed in the bottom surface of an underground structure, and which has a water-permeable part provided in an inner space part, has a valve mounting part provided on the water-permeable part, and has a filter mounting part provided on the valve mounting part; a leakage prevention pad for covering the gap between the upper portion of the drainage body and the bored hole provided in the bottom surface of the underground structure; a leakage prevention cover provided on the leakage prevention pad such that the leakage prevention pad is pressed toward the bottom surface of the underground structure by means of anchor bolts; a backflow prevention valve inserted into the valve mounting part to prevent backflow; and a filter inserted into the filter mounting part to remove foreign material.

JPS54154108	METHOD OF FORMING UNDERGROUND STRUCTURE
JP2004244887	HORIZONTAL SOIL RETAINING CONSTRUCTION METHOD

BYEON JAE HO (KR)
SONG JUNG KEUN (KR)
KIM JAE HWAN (KR)
CHOI MIN HO (KR)

PCT/KR2021/013429

November 03, 2022

September 30, 2021

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EDC LIFE CO LTD (KR)

E02D29/045; B01D35/02; E02D31/00; E02D31/02; E04B1/00; F16K15/00

KR101143759B1	2012-05-11
JP2006037391A	2006-02-09
KR19990018217U	1999-06-05
JP3165904U	2011-02-10
KR101965109B1	2019-08-13
JP2002070494A	2002-03-08

CHOI, Hak Hyun (KR)

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