Title:
揚水装置
Document Type and Number:
Japanese Patent JP3567411
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To perform pumping of underground water only from an aquifer present below in a state that a communication state between a well pipe and the aquifer formed above is disconnected through closing of a water intake valve by connecting a water intake pipe to the well pipe through a water intake valve. SOLUTION: A pumping device 13 is formed such that an impervious material 20 to cut off water by vertically partitioning an excavated hole 5 in a position of an impermeable layer 1 and a well pipe 15 provided with a water injection screen 14 in a position extending through the impervious material 20 and fronting on a water injection layer 3 are arranged in an excavated hole 5 extending through the impermeable layer 1 to the water injection layer 3. A pump 18 and a packer 22 are disposed in the well pipe 15 and further, a water intake pipe 17 having an water intake screen 16 in a position fronting on the water intake layer 2 and a lower end connected in the position of the impermeable layer 1 to the well pipe 15 through a water intake valve 21 is arranged in juxtaposition in the well pipe 15.
Inventors:
Kiji Miyake
Nobuaki Kosaka
Ken Amano
Katsuyuki Tamaki
Nobuaki Kosaka
Ken Amano
Katsuyuki Tamaki
Application Number:
JP6696697A
Publication Date:
September 22, 2004
Filing Date:
March 19, 1997
Export Citation:
Assignee:
Shimizu Construction Co., Ltd.
International Classes:
E21B43/00; E02D19/10; E03B3/12; E21B43/14; F04D29/44; (IPC1-7): F04D29/44; E02D19/10; E03B3/12; E21B43/14
Domestic Patent References:
| JP8311852A | ||||
| JP762696A |
Attorney, Agent or Firm:
Yoshinori Yanagita
Masatake Shiga
Takashi Watanabe
Shigeo Naruse
Masatake Shiga
Takashi Watanabe
Shigeo Naruse