Construction method for three-dimensional intersection concave-convex fulcrums

The present invention relates to a construction method interchange fulcrum irregularities, comprising the steps of: applying for PILE: two outer duct structure of the first pile lining edge, are sequentially arranged outward; stringers administered as a substrate: First embedded guide Inside the grid, the grid connected to the top guide wall pierced steel, and then pouring a bottom sill; style applied to the initial channel support ring beam: supporting ring beam embedded steel side, support ring beam after pouring is completed, the grid welding the gate, facilities for initial support; pilot tunnel backfill concrete material; applying secondary lining arch style channel: a temporary recess and support the upper part of PBA duct, provided by the reinforcement joists; facilities for the secondary lining arch PBA : by lining lining trolley, get rid of some, some lining. The advantages are: Reversed solve the interchange at no arch support and get rid of the high cost of concrete, large dust, a lot of work, time-consuming problem; process is simple, provincial labor and material progress fast, good quality, the enterprise has brought great economic benefits.