| 摘要 |
PURPOSE:To inject the ground improving chemical agent uniformly by spirally winding a wire rod on the strainer device pressing the chemical agent into the ground and equalizing ejecting pressure extending over the whole area of the strainer. CONSTITUTION:The pressed chemical agent is ejected through a chemical agent discharge hole 2, passes between a thin-film cylindrical body 3 and a main body 1, expands the cylindrical body 3 approximately uniformly, is ejected through slits or openings 5 equally formed extending over the whole area of the cylindrical body 3, and is ejected homogeneously into the ground through clearances among the coiled wire rods 4 uniformly wound extending over the whole area of the cylindrical body 3. |
