Room approach bridge and its combined overpass

Abstract

The invention relates to the technical field of traffic bridge construction, in particular to a house-type approach bridge and a combined urban arched steel structure overpass. It includes the main bridge and the approach bridge. The approach bridge includes the road surface of the approach bridge and a room-type support mechanism. A plurality of room-type support mechanisms are arranged under the approach bridge road surface. The room-type support mechanisms are arranged side by side. The room-type support mechanism is composed of eaves, beams and walls. The main bridge includes an arched steel structure anti-girder, an arched road slab, a bridge column and a bridge pier. The invention draws lessons from the building construction technology, and studies the approach bridge and its combined overpass. The house-type approach bridge structure no longer relies on drilling piles to fix the bridge body, and no full or half-width road closures are required when constructing the approach bridge, which improves road traffic capacity and greatly reduces construction congestion. The house-type approach bridge can be hoisted and transported to the construction site after being prefabricated on the construction site. The stability of the approach bridge can be increased by enlarging the feet, and the jack seat hole is prefabricated under the pier. Effectively guarantee the safety of the bridge body, especially suitable for use in collapsible loess layers.

Description

technical field [0001] The invention relates to the technical field of traffic bridge construction, in particular to a house-type approach bridge and a combined overpass. Background technique [0002] As the number of cars in various cities increases year by year, the difficulty of road congestion control and the pressure of municipal road construction are increasing year by year. Many cities are building subways, viaducts and other links to set up urban traffic pressure. Practice has proved that the layout of viaducts is effective in controlling ground traffic congestion. One of the best ways, but many reasons restrict the construction of urban overpasses, and the reasons mainly include the following four aspects: [0003] 1. The construction of an overpass requires full or half-width road closures. Road closures generally take 1-2 years. The narrow road surface makes it difficult for vehicles to pass, and the decrease in passing efficiency further aggravates congestion. ...

AI Technical Summary

Problems solved by technology

[0003] 1. The construction of an overpass requires full or half-width road closures. Road closures generally take 1-2 years. The narrow road surface causes inconvenient traffic for vehicles, and the decrease in passing efficiency further aggravates congestion

[0004] 2. The volume of the overpass is huge. In order to realize three-dimensional and multi-directional traffic, long-distance and many approach bridges are often designed and built. Too long distances of approach bridges not only hinder the city appearance, but also seriously increase the construction time

[0005] 3. The construction of an overpass requires pre-drilling well piles. The number of well piles is large and dense, and it is easy to cross with the water supply, gas, and communication pipelines under the urban road. time

[0006] 4. The investment of a single bridge generally requires tens of millions of yuan, and the construction of its approach bridge accounts for about 70% of the total construction cost, which is expensive

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