METHOD AND APPARATUS TO SEAL A JUNCTION BETWEEN A LINED MAIN PIPE AND A LATERAL PIPE CONNECTED THERETO

摘要

A method includes creating a junction between a main pipe having a cured rehabilitation liner and a lateral pipe. The method is used in conjunction with an installation of the liner on an inner surface of the main pipe, and includes the steps of: inserting a first sealing device into the lateral pipe opening, the first sealing device blocking the lateral pipe opening and protruding with one end into the main pipe; installing and curing the liner on the inner surface of the main pipe covering the lateral pipe opening to define a cavity between the liner and the inner surface of the main pipe; making a hole in the liner at the lateral pipe opening; injecting a substance into the cavity to substantially fill the cavity; curing the substance; and removing the sealing device from the lateral pipe opening after the substance has cured.

主权项

1. A method for creating a junction between a main pipe having a cured rehabilitation liner and a lateral pipe, wherein said main pipe has a lateral pipe opening in fluid communication with said lateral pipe, said method being used in conjunction with an installation of said liner on an inner surface of said main pipe, wherein the following steps are performed:
inserting a first sealing device into said lateral pipe opening, said first sealing device blocking said lateral pipe opening and protruding with one end into said main pipe, installing and curing said liner on said inner surface of said main pipe covering said lateral pipe opening, thereby creating a bump between said liner and said main pipe said lateral pipe opening, said bump defining a cavity between the liner and the inner surface of the main pipe making a hole in said liner at said lateral pipe opening, injecting a substance into said cavity to substantially fill said cavity; curing said substance; removing said sealing device from said lateral pipe opening after said substance has cured.