Construction technology of section assembled box girder erection based on descending bridge erecting machine

Abstract

The invention discloses a construction process for segmental assembled box girder erection based on a descending bridge erecting machine. The descending bridge erecting machine is used to erect the constructed box girder. The descending bridge erecting machine includes a bottom horizontal support system, a main girder System, longitudinal moving system, cantilever crane, assembly frame and assembly vehicle; during the construction of the box girder erection facilities, the construction of each hole beam of the constructed box girder is carried out along the longitudinal bridge direction from back to front. The process is as follows: 1. Construction of the first hole beam erection: installation of the main structure of the bridge erecting machine, hoisting of box girder segments and assembly of box girder segments; Second, construction of the next hole beam erection: the main structure of the bridge erecting machine moves forward to cross the hole, the cantilever crane moves forward, Box girder segment hoisting and box girder segment assembly; 3. Repeat step 2 until the erection process of the constructed box girder is completed. The invention has the advantages of simple process steps, reasonable design, convenient construction, easy control of the construction process, good use effect, simple and rapid completion of the box girder erection construction process, and easy guarantee of construction quality.

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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