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Construction method for carrying large box girder by tire type portal jib crane

A construction method and tire-type technology, applied in bridges, bridge construction, erection/assembly of bridges, etc., to achieve good safety, mature technology, and reasonable load distribution

Active Publication Date: 2009-07-08
CHINA RAILWAY NO 2 ENG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for super-large box girders above 1,000 tons, there have been no engineering examples of rubber-tyred gantry cranes being transported in a prefabricated yard before at home and abroad.

Method used

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  • Construction method for carrying large box girder by tire type portal jib crane
  • Construction method for carrying large box girder by tire type portal jib crane
  • Construction method for carrying large box girder by tire type portal jib crane

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Embodiment Construction

[0027] The construction method of the present invention tire-type door crane carrying box girder see figure 1 , figure 2 , image 3 , Figure 4 As shown, it is necessary to reserve hoisting holes when the box girder is prefabricated. After comparing various lifting methods such as the bottom joist / sling method, the roof / web / bottom perforated boom method, and the top / web / bottom pre-embedded lifting ring method, the roof perforated boom method was finally selected. This method has the advantages of There are many similar construction experiences at home and abroad, mature and reliable schemes, safe operation, easy disassembly and assembly, high efficiency, no influence on the prefabricated model of the box girder, and can effectively reduce the height of the equipment, etc. Roof piercing boom method see figure 1 and figure 2 .

[0028] Concrete construction method of the present invention is following steps (see image 3 ):

[0029] 1. Handling preparation

[0030] (1...

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Abstract

The invention discloses a construction method for carrying large-scale box girder by tire type gantry crane, which comprises the following steps: 1): running empty wagons to collimating position: 2) lifting the beam; 3) running the double machine linked lifting beam longitudinally; 4) turning the wheel group by 90 degrees; 5) running the double machine linked lifting beam transversely; 6) placing the beam into the target position. The construction method of the invention for carrying large-scale whole hole prefabricated box girder in box girder fabrication yard is advanced, safe, reliable and efficient, and meets the requirement of large tonnage box girder prefabrication in the sea-crossing bridge tidal flat area in Hangzhou Bay.

Description

technical field [0001] With a total length of 36.5 kilometers, the Hangzhou Bay Bridge is the longest sea-crossing bridge in the world currently under construction. Among them, the upper structure of the south approach bridge K71+335~K81+435 adopts 50m prestressed concrete continuous box girder, and the single-piece box girder weighs about 1430t. In order to ensure the quality of the bridge and the progress of the project, the box girder is prefabricated in a centralized manner in a factory. How to safely, quickly and efficiently transport the box girder from the prefabricated pedestal to the storage pedestal, and how to transport the finished box girder from the storage pedestal to the bridge lifting girder Machine place is the key link of box girder prefabrication and erection. The invention relates to a construction method for transporting a 50m / 1430t double-width integral prestressed concrete box girder in a prefabrication field by using two 800-ton tire-type transporters...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D21/00
Inventor 刘乃生熊国辉张权史渡李友明林原贾先奎李世龙
Owner CHINA RAILWAY NO 2 ENG GRP CO LTD
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