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

Abstract

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 improved.

Description

technical field [0001] The invention relates to the field of bridge engineering, in particular to an overhead beam-arch composite rigid frame bridge capable of realizing double-layer traffic functions within a span range of 200 to 300 m. Background technique [0002] With the rapid development of the urban economy and the continuous expansion of the city scale, the demand for urban roads and rail transit systems to cross the river (river) is also increasing; Influenced by comprehensive factors such as management, the resources of urban river (river) channels are very limited. The public-rail cross-river bridge not only solves the needs of urban roads and rail transit across the river (river), but also solves the contradiction of limited urban bridge space resources. It is an excellent construction plan. At present, most of the main girders of public rail public construction bridges are in the form of double-layer steel truss girders, which have the following problems: (1) t...

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Problems solved by technology

At present, most of the main girders of public rail public construction bridges are in the form of double-layer steel truss girders, which have the following problems: (1) the amount of steel used for double-layer steel truss girders is large, and the project cost is high; (2) double-layer steel trusses The girder structure is complex and difficult to design and construct; (3) The structure of the double-layer steel truss girder bridge has large vibration and noise, which has a great impact on residential, commercial, and leisure plots around the city; (4) The post-maintenance workload of the steel structure Huge, high maintenance cost in the later stage of the whole life cycle; (5) The early phase implementation of the public rail has a large capital investment and a high idle rate of funds

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