Title:
RESTORATION OF UNDERGROUND WATER
Document Type and Number:
Japanese Patent JP3200781
Kind Code:
B
Abstract:
PURPOSE: To reduce the expense by a method wherein when a landslide protection wall is built, pumped up underground water is reduced to an underground not through a sewerage and a bored hole but through a permeation layer.
CONSTITUTION: A ground inside a continuous underground wall 21 having a permeation layer 11 formed on the outer side is excavated. In this case, a pumping-up pipe 4 is driven down to a position deeper than the lower end of the continuous underground wall 21. Underground water is then pumped up with the aid of a pump 41. Simultaneously, the level of underground water is lowered so that boiling is prevented from occurring to an excavated bottom part 3. Pumped up underground water is absorbed in the permeation layer 11 through a reduction pipe 42 continued to the upper part of the permeation layer 11. Further, the underground water is permeated in a ground through the permeation layer 11. This method causes reduction of pumped up underground water to a ground without using a sewerage and a bored hole.
Inventors:
Hashimoto, Isao
Oya, Hiroshi
Arakawa, Yozo
Yokoyama, Masaharu
Oya, Hiroshi
Arakawa, Yozo
Yokoyama, Masaharu
Application Number:
JP1993000046033
Publication Date:
June 22, 2001
Filing Date:
February 12, 1993
Export Citation:
Assignee:
TAISEI CORP
International Classes:
E02D3/10; E02D19/10; E02D3/00; E02D19/00; (IPC1-7): E02D3/10; E02D19/10