An arch bridge structure and its laying process

Abstract

The invention relates to an arch bridge structure and an implementing and laying technology thereof. The arch bridge structure comprises multiple segments of cross beams which can be sequentially connected in the front and back direction and are arranged in parallel, multiple segments of pressure-bearing pipes which are arranged in parallel are laid at the upper end of the cross beams which are arranged in parallel, and a road is laid at the upper ends of the pressure-bearing pipes; the road is sequentially composed of a cushion layer, a base layer and a surface layer from bottom to top, and a green rail segment, a first green belt segment, a footpath segment and a second green belt segment are separately distributed on the surface layer; the left side and the right side of the cross beams are fixedly provided with rib beams used for fixing and bearing the cross beams, the rib beams are provided with GRC plates through installing supports, and the GRC plates make contact with the bottom ends of the cross beams. According to the arch bridge structure and the implementing and laying technology thereof, the self weight of a bridge body is reduced through the pressure-bearing pipes laid at the upper ends of the cross beams and the cushion layer and the base layer which are laid on the pressure-bearing pipes; the mode that concrete is poured at the bottoms of the cross beams is replaced by the mode that the GRC plates are installed at the bottoms of the cross beams through the rib beams, therefore, the self weight of the bridge body is reduced, the construction difficulty is reduced, and the cost is saved.

Description

technical field [0001] The invention relates to an arch bridge structure, in particular to an arch bridge structure and its laying process, and belongs to the technical field of bridge structures and construction. Background technique [0002] At present, with the increasing number of means of transportation, roads and railways have begun to develop from the ground to the air, forming an increasing number of road bridge projects, but there are many problems in today's road bridge structures: the design load of the bridge is "medium-live load". If the load factor is too large, the safety reserve of the bridge will be greatly reduced, and long-term operation will have a greater negative impact on the safety of the bridge; under the long-term load of trains and large passenger and freight vehicles, the fatigue damage of the bridge structure will be aggravated, and the safety reserve of the bridge will be greatly reduced ; When a vehicle passes a bridge at a certain speed, it wi...

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Problems solved by technology

[0002] At present, with the increasing number of means of transportation, roads and railways have begun to develop from the ground to the air, forming an increasing number of road bridge projects, but there are many problems in today's road bridge structures: the design load of the bridge is "medium-live load". If the load factor is too large, the safety reserve of the bridge will be greatly reduced, and long-term operation will have a greater negative impact on the safety of the bridge; under the long-term load of trains and large passenger and freight vehicles, the fatigue damage of the bridge structure will be aggravated, and the safety reserve of the bridge will be greatly reduced ; When a vehicle passes a bridge at a certain speed, it will produce a vertical dynamic effect, and the dynamic coefficient is generally used (the ratio of the maximum response value of the bridge due to the vertical action of the vehicle passing through to the maximum response value of the vertical action of the vehicle when it is stationary) The main factors affecting the dynamic coefficient are the form and span length of the bridge structure, the type of rolling stock, the equipment status of the bridge line, etc.; under the long-term load of trains and large passenger and freight vehicles, the fatigue damage of the bridge structure will be aggravated. Affect the fatigue performance of the bridge and shorten the fatigue life of the structure

At present, the overpasses built and under construction in China are all made of steel frame or reinforced concrete structure, which has a long construction period, high manufacturing and installation costs, and a very limited service life, which has become the Achilles heel of urban overpass construction , so many places have to use underground passages with higher cost and more difficult management and maintenance to replace

[0004] The existing reinforced concrete bridge is a span bridge, and the reinforced concrete bridge needs a large number of expensive temporary facilities such as special formwork and special support during the construction process, which increases the construction cost

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