Deck type beam-arch combined rigid frame bridge for double-layer traffic

The invention discloses a deck type beam-arch combined rigid frame bridge for double-layer traffic. The deck type beam-arch combined rigid frame bridge comprises an upper chord box-shaped beam arranged in the longitudinal direction of the bridge, a lower chord box-shaped arch for supporting the upper chord box-shaped beam and bridge piers; urban road traffic is located on the bridge surface of theupper chord box-shaped beam, and urban rail traffic is located in an upper chord box chamber of the upper chord box-shaped beam; a double-layer traffic function can be achieved, the characteristics of reducing the construction cost, being convenient and fast to construct, convenient to maintain, capable of reducing noise, saving energy, environmentally friendly and the like are achieved, the excellent mechanical property of the beam-arch combination is brought into full play, the span of the road-rail dual-purpose concrete bridge is boosted to be within the range of 200-300 m, and the spanning capacity is greatly imp