| 摘要 |
PROBLEM TO BE SOLVED: To provide an inexpensive underground purification wall having excellent purification efficiency of ground water, capable of regenerating easily lowered clarification function.SOLUTION: A step is repeated, in which a shape retention frame is inserted into a casing intruded into the ground, and a contaminant adsorbent is filled inside the shape retention frame and a drain material is filled on the outside, and after removing the casing, the casing is positioned so that the outer peripheral surface becomes close to the shape retention frame, intruded again into the ground, and a new shape retention frame is inserted into its inner part, and the contaminant adsorbent is filled inside the shape retention frame and the drain material is filled on the outside, then the casing is removed.SELECTED DRAWING: Figure 2 |
