To provide a differential pumping earth retaining wall for pumping a necessary amount of ground water at a necessary depth for a necessary period by eliminating the necessity of many keep wells in a site, and to provide a differential pumping well.
In the differential pumping earth retaining wall 3 and the differential pumping well 3, the differential pumping well 3 is composed of: water collection parts 4 and 5 installed by corresponding to a plurality of water storing strata 32 and 33; shafts 6 lowering ground water from the water collection parts; a valve provided between each water collection part and shaft, and selecting inflow ground water and a pump arranged at the lowest part of the shaft 6, and pumping ground water. The differential pumping well 3 is installed in a soil cement wall composed as an earth retaining wall 2, so that reduction of a ground water treatment cost is contrived and influence to a peripheral environment is reduced.
| JPH07247553 | UNDERGROUND WATER LIFT |
MIYAKE NORIJI
ISHIKAWA AKIRA
