| 摘要 |
An inner casing element of a well (3) is formed such that a continuous ring is formed. The wall of the inner casing element (1) is provided with bending points (2) so that the ring-shaped element (1) is bendable from a round form to a flatter form. Then the element (1) can be mounted inside the well (3) from an opening (4) in the cover of the well (3). The element (1) is rounded in the well (3). A required number of ring-shaped elements is mounted on top of one another. The structure of the elements (1) is self-supporting. When a cylindrical structure of desired height has been formed of the elements (1), the space between the well (3) to be renovated and the ring elements (1) is cast for instance with fluid concrete (6). |
