Method of lining passageways by applying a pre-liner sleeve and hardenable composition

摘要

A method of lining passageways, or pipelines, employs a pre- liner sleeve formed of a thin plastic material, which is applied to the inside surface of the passageway to be lined. During application of the pre- liner sleeve, it is held in a concertina-like folded condition in a magazine which is moved along the passageway by operation of air pressure which is applied from within the pre-liner sleeve, and which simultaneously inflates the pre-liner sleeve so that it communicates with the inside surface of the passageway. A spray head follows the magazine from within the inflated pre-liner sleeve and applies a hardenable composition, such as mortar, to the inside of the inflated pre-liner sleeve. The spray head is followed, in some embodiments, by a tube which is everted to communicate with the applied hardenable composition under air pressure. The tube holds the applied layer in position while it cures.