Apparatus for draining tunnel-like hollow bodies, accessible at least by crawling, such as sluiceways or the like within a limited time

摘要

The apparatus consists of an arrangement of convexly curved shell elements extending over the length of the hollow body, connected to one another at the abutting faces 4, 5 and having marginal fastening means for the releasable connection (sealed off from pressure water and gas) to the inner wall of the hollow body.