Segment splicing box girder erection and construction technology based on descending bridge girder erection machine

Abstract

The invention discloses a segment splicing box girder erection and construction technology based on a descending bridge girder erection machine. The descending bridge girder erection machine is adopted for erecting and constructing a constructed box girder. The descending bridge girder erection machine comprises a bottom horizontal supporting system, a main girder system, a longitudinally-moving system, a cantilever crane, a splicing frame and a splicing trolley. When the constructed box girder is erected and constructed, each hole girder of the constructed box girder is erected and constructed from rear to front in the longitudinal bridge direction. The process includes the following steps that firstly, the first hole girder is erected and constructed, wherein a main structure of the bridge girder erection machine is installed, and box girder segments are lifted and spliced; secondly, the next hole girder is erected and constructed, wherein the main structure of the bridge girder erection machine is moved forwards to stride a hole, the cantilever crane is moved forwards, and the box girder segments are lifted and spliced; and thirdly, the second step is repeated till the process of erection and construction of the constructed box girder are finished. By the adoption of the technology, the technological steps are simple, design is reasonable, construction is easy and convenient, the construction process is easy to control, a use effect is good, the box girder erection and construction process can be easily, conveniently and rapidly completed, 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 process for segmentally assembled box girder erection based on a descending bridge erecting machine. 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 ...

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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