| 摘要 |
<p>The present invention relates to a method for renovating wells, especially drain wells, and is characterized in that semi-circular ring elements (3, 3a) with a smaller diameter than the inner diameter of the original well are led into the old well through an opening (2), which ring elements (3, 3a) are stacked concentrically and by pairs on top of each other in the well to a desired height, after which the gap between the old well rings (1) and the new ring elements (3, 3a) is filled with concrete (6).</p> |
