Bridge-dismounting construction method for prestressed concrete continuous beam

A construction method and concrete technology, applied in bridges, bridge maintenance, bridge reinforcement, etc., can solve water pollution and other problems, achieve high safety factor, ensure normal traffic conditions, and avoid construction accidents

Pending Publication Date: 2020-08-07
SHANGHAI URBAN CONSTRUCTION MUNICIPAL ENGINEERING (GROUP) CO LTD
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Problems solved by technology

[0002] During the dismantling of prestressed concrete continuous girders, a large amount of construction waste is likely to be generated, and since the channel below the bridge is generally in a state of navigation, it is necessary to close the navigation for safety reasons during the demolition of the bridge, and at the same time The generated construction waste will cause great pollution to the water, and at the same time, the waste removal after the demolition will also require a long-term closure of the waterway

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  • Bridge-dismounting construction method for prestressed concrete continuous beam

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Embodiment

[0012] Embodiment: The prestressed concrete continuous girder bridge demolition construction method in this embodiment includes the following steps, specifically in conjunction with a certain engineering example to illustrate:

[0013] River channel cleaning: Large floating cranes and barges are mainly used for hoisting to remove the superstructure of the main bridge. Therefore, the river channel on the transportation route needs to be cleaned before dismantling to ensure that large floating cranes and barges can pass on the transportation route.

[0014] When cutting the upper continuous beam, it is necessary to install steel pipe piles. Since there are rubbish such as gravel in the river, the location where the steel pipe piles are installed must be cleaned to ensure that the steel pipe piles can be driven in.

[0015] Removal of continuous beam ancillary facilities: before the main structure is cut and removed, structures such as curbs, kicks, steel guardrails, lamp posts, a...

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Abstract

The invention relates to the technical field of bridge construction, in particular to a bridge-dismounting construction method for a prestressed concrete continuous beam which is used for dismountinga flange plate of a prestressed concrete continuous beam. The method comprises the following steps of erecting a temporary supporting system used for temporarily supporting a No. 0 block and a side span cast-in-place section of a prestressed concrete continuous beam and temporarily consolidating a pier beam; cutting and removing a closure section; erecting a hanging basket on rest beam body of theprestressed concrete continuous beam, cutting and dismounting the rest beam bodyof the prestressed concrete continuous beam block by block in the reverse construction sequence direction of the hanging basket and hositing cut beam body sections to a barge below through the hanging basket and transporting the sections through a barge; removing the hanging basket after the operation is finished, andcutting and removing the No. 0 block; cutting and removing a side hole cast-in-place section; and cutting and dismantling the lower structure of the prestressed concrete continuous beam. The method has the advantages that the influence on navigation channel navigation is relatively small, the pollution to water is small, and demolition project construction progress is greatly improved.

Description

technical field [0001] The invention relates to the technical field of bridge construction, in particular to a bridge demolition construction method for prestressed concrete continuous girders. Background technique [0002] During the dismantling of prestressed concrete continuous girders, a large amount of construction waste is likely to be generated, and since the channel below the bridge is generally in a state of navigation, it is necessary to close the navigation for safety reasons during the demolition of the bridge, and at the same time The generated construction waste will cause great pollution to the water, and at the same time, the removal and transportation of garbage after the demolition will also require the waterway to be closed for a long time. Contents of the invention [0003] The object of the present invention is to provide a kind of prestressed concrete continuous girder demolition bridge construction method according to above-mentioned deficiencies in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D24/00
CPCE01D22/00
Inventor 黄永春赵国强于国伦韩洪明金振东
Owner SHANGHAI URBAN CONSTRUCTION MUNICIPAL ENGINEERING (GROUP) CO LTD
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