Construction method for erecting prefabricated box girder of overpass in deep excavation cutting area

A construction method and box girder technology, applied in bridge construction, bridges, erection/assembly of bridges, etc., can solve problems such as poor geographical environment, impact on bridge construction progress, and deep cutting excavation, so as to achieve rich selectivity, environmental protection and efficient construction Effect

Pending Publication Date: 2021-02-26
ROAD & BRIDGE INT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the continuous improvement of expressway construction technology in our country, expressways in remote mountainous areas have developed rapidly in recent years. When new expressway cuttings block existing roads, overpasses are often used to connect existing roads to ensure the life and prod

Method used

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Examples

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Embodiment 1

[0037] Taking the prefabricated box girder erection construction of the Wangjialing overpass as an example, the method for erecting the prefabricated box girder overpass in the deep excavation cutting area of ​​the present invention is introduced.

[0038] K27+209.000 Wangjialing Agricultural Automobile Overpass, the superstructure of the bridge adopts (4x25)m prefabricated partly prestressed concrete continuous box girder, with a side span weight of 67.78t and a middle span weight of 65.38t. The whole bridge consists of 1 joints, with a total length of 106.4m, a bridge width of 8m, and a skew angle of 90°. The substructure adopts column type piers, cast-in-place pile foundation, and the middle zone is a solid pier, with a pier height of 18.4m, a cover beam height of 1.4m, a support height of 0.25m, and a total height of 20.05m. The abutment is a pile abutment, and the pile foundation is designed according to rock-socketed piles.

[0039] Three Zoomlion QAY350 (350t) truck cr...

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Abstract

The invention relates to a construction method for erecting a prefabricated box girder of an overpass in a deep excavation cutting area, which comprises the following steps of removing the girder froma prefabricated girder field by using a gantry crane, transporting the box girder to a specified place, and hoisting the box girder to the specified position by using at least two cranes on site. According to the double-machine lifting construction method for erecting the overpass prefabricated box girder in the deep excavation cutting area, the construction quality is improved, safety is guaranteed, and the construction progress is accelerated. The method is convenient to construct and simple to operate. The effect is outstanding, and the truck-mounted crane installation prefabricated box girder has low requirements for topography and geomorphism and is convenient and flexible. The construction period of the box girder installation process is greatly shortened by installing the prefabricated box girder through the truck crane, and a good foundation is laid for the project construction period shortening target. The construction teams for installing the box girder by the truck crane are numerous, the selectivity is rich, and the construction is more environment-friendly and efficient through reasonable mechanical combination and an aerial relay mode.

Description

technical field [0001] The invention relates to the field of bridge engineering, in particular to a construction method for erecting a prefabricated box girder of a flyover in a deep excavation cutting area. Background technique [0002] With the continuous improvement of expressway construction technology in our country, expressways in remote mountainous areas have developed rapidly in recent years. When new expressway cuttings block existing roads, overpasses are often used to connect existing roads to ensure the life and production of local people. However, the geographical environment in mountainous areas is poor and the excavation is deep. How to ensure the safe erection of the prefabricated box girder of the flyover is very important, and at the same time affects the construction progress of the bridge. Contents of the invention [0003] The object of the present invention is to provide a kind of construction method of prefabricated box girder erection of overpass in...

Claims

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Application Information

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IPC IPC(8): E01D21/00E01D2/04
CPCE01D21/00E01D2/04
Inventor 彭文余曹震揭庆芳王威周亭李跃生贾健
Owner ROAD & BRIDGE INT
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