| 摘要 |
PROBLEM TO BE SOLVED: To provide lining material for constituting a new manhole whose durability and sealing properties are improved, on the inner side of an existing degraded or damaged manhole.SOLUTION: A manhole constituting lining material of the present invention is used to form a new internally-provided manhole having a cylindrical shape by vertically and circumferentially disposing a plurality of curved hexagonal lining segments on the inner side of an existing manhole. Further, on the upper end of the internally-provided manhole, trapezoidal upper end segments are arranged, each of which is formed of a lower half of the lining segment, and on the lower end of the internally-provided manhole, trapezoidal lower end segments are arranged, each of which is formed of an upper half of the lining segment.SELECTED DRAWING: Figure 1 |
