Segmental assembling box girder construction technology

Abstract

The invention discloses a segmental assembling box girder construction technology. A constructed box girder is composed of multiple porous girders. Each porous girder is formed by assembling multiple box girder segments from back to front. When the constructed box girder is constructed, the process includes the following steps that firstly, the box girder segments are prefabricated, wherein all the box girder segments used for forming the constructed box girder are prefabricated in a prefabrication site in a concentrated manner; secondly, the box girder segments are transported, wherein all the box girder segments are transported to the erection position of the constructed box girder through a girder transport vehicle; thirdly, the box girder is erected, wherein the constructed box girder is erected and constructed through a descending bridge girder erection machine, and the descending bridge girder erection machine comprises a bottom horizontal supporting system, a main girder system, a longitudinal moving system, a cantilever crane, an assembling frame and an assembling vehicle; and fourthly, a system is converted, wherein the system is converted after the erection construction process is finished. By the adoption of the segmental assembling box girder construction technology, the technological step is simple, design is reasonable, construction is easy and convenient, a construction process is easy to control, a use effect is good, the segmental assembling box girder assembling process can be simply, conveniently and rapidly finished, and the construction quality is easy to guarantee.

Description

technical field [0001] The invention belongs to the technical field of bridge construction, and in particular relates to a construction technique for segmentally assembled box girders. Background technique [0002] With the development of society, the bridge construction technology is not only innovating, the segmental assembled box girder construction has gradually become a kind of construction due to its advantages of fast construction speed, high degree of industrialization, high degree of automation, improved labor efficiency and strong environmental adaptability. The new construction technology, and the erection accuracy requirements of segmental assembled box girders are also greatly improved. [0003] The Second Wuhu Yangtze River Highway Bridge starts from Shijian, Wuwei County, Wuhu City, connects the North Yanjiang Expressway, passes through Cangtou and Dougou, crosses the Yangtze River at Jitou Mountain, ends at Fanchang Eshan, and connects with the completed Wuhu...

AI Technical Summary

Problems solved by technology

Compared with the downward type bridge erecting machine, the upward type bridge erection machine has the advantages of no need to lay running tracks, large lifting height, and convenient installation. However, the upward type bridge erection machine has the following defects: First, the overall installation height is high and stable Second, the requirements for the substructure of the bridge are high, specifically for the pier body structure of the bridge to be constructed, so as to meet the requirements of stability and support; third, the erection process is relatively complicated, and the pier needs to be installed in advance The top beam should be transported backwards, and the assembly sequence of the head and tail spans should be considered; fourth, the visibility of the girder section assembly process of the upward bridge erecting machine is poor, the assembly accuracy is not easy to control, and the linear adjustment is difficult

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