Construction method for tunnel contact passage in shield section of underground railway

The present invention relates to a construction method of underground railway shield-driven running tunnel interconnecting channel. It is characterized by utilizing steel segments of downward tunnel to make grid front earth-cutting device, connecting said grid front earth-catting device with pipe-jacking equipment to form grid squeeze-type pipe-jacking machine, jacking to upward tunnel from downward tunnel and adopting prefabricated composite steel pipe components to assemble them to form the invented interconnecting channel. Said onstruction, method includes the following processes; consolidating earth body in tunnel portal entrance and exit zone, jacking axis measurement setting-out, creating concrete pipe segment supporting system, jacking pie and making pipe go out of tunnel, setting water-proofing seal rubber band, laying guideway, arranging stress-releasing holes, blocking tunnel portal and grouting mortar, etc.