Trinner Method (Triple layer water cutoff wall method)

Vertical water cutoff wall technology preventing contaminants leaching into soil or groundwater

The Trinner method is a vertical water-cutoff wall technology that prevents contaminants from leaching into surrounding soil and groundwater by using blocking and seepage control work to enclose the contaminated soil.

イメージ
イメージ

The Trinner method combines two techniques that have been well used: the diaphragm wall water-cutoff method (soil cement wall) and the sheet-type water-cutoff method. Using the merits of each makes for a highly reliable water-cutoff wall method.

Implementation method

Procedure

  1. Chainsaw-type cutter digs down to low permeable layer.
  2. It is moved laterally, and cement slurry is poured in and mixed with the site soil to form a continuous wall.
  3. Before the wall hardens sheeting is inserted using a guide frame.
  4. The sheeting is left in place as the guide frame is withdrawn.