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Multi-span box girder integral ultrahigh alternate jacking construction system and method

A construction method and jacking technology, applied in the direction of bridge, bridge maintenance, bridge reinforcement, etc., can solve the problem that the integrity, safety, reliability, safety and reliability of the original bridge structure cannot be guaranteed, and the existing bridge displacement technology cannot be applied, etc. problems, to achieve the effect of ensuring the urban ecological environment, reducing building energy consumption, and ensuring the construction period

Inactive Publication Date: 2016-04-20
CCCC THIRD HARBOR ENG +2
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Problems solved by technology

[0005] On this basis, the existing bridge displacement technology of intermittent jacking cannot be applied to existing bridge jacking projects that require overall jacking and high jacking heights, and cannot guarantee the integrity, safety, and reliability of the original bridge structure. Reliability and safety and reliability of construction

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  • Multi-span box girder integral ultrahigh alternate jacking construction system and method

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Embodiment Construction

[0053] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0054] The existing overpass bridge involved in this example is the urban grade I main road, and the bridge is a full-length bridge with a width of 25m and two-way six lanes. Based on the establishment of viaducts along the whole line, it is necessary to renovate the bridge structure at the upper and lower bridges of the existing line bridge. In order to save engineering investment and reduce the social impact of demolition and reconstruction, in this example, the two box girders at the end of the existing overpass are jacked up to adjust the elevation or curve of the existing overpass to connect with the newly built viaduct, so as to Seek to save money to the greatest extent, protect the environment, and minimize the impact of traffic.

[0055...

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Abstract

The invention discloses a multi-span box girder integral ultrahigh alternate jacking construction system and method. By controlling two groups of jacks capable of positively applying a jacking force, after jacking of one group of jacks is finished, the jacking force of the group of jacks is uniformly linearly transferred to the second group of jacks for performing alternate continuous jacking operation. The overpass bridge ultrahigh alternate jacking construction solution can ensure that during jacking, a bridge structure is safe, the jacking precision and a line type after the whole bridge fall down meet design demands, a construction period is ensured, building energy consumption is reduced and an urban ecological environment is met.

Description

technical field [0001] The invention relates to road construction technology, in particular to the jacking construction technology of existing overpass bridges. Background technique [0002] The early building shifting project in the world was the shifting of a one-story farm house in New Plymouth, New Zealand in 1873. At that time, a steam locomotive was used as the traction device; while the modern shifting technology began in 1901 in the early twentieth century. Due to the expansion of the campus, Hua University moved the three-story science building weighing about 60,000kN, and in the process of moving, in order to bypass another building, it adopted steering technology and rotated it by 45°. The project uses logs as rolling devices, and screw jacks provide jacking force and horizontal traction. Over the next hundred years, the technology was applied in many countries. In the early 1990s, this technology was applied in China. In 1991, the sliding translation method wa...

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Application Information

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IPC IPC(8): E01D22/00
CPCE01D22/00
Inventor 廖玉珍章柏林伊左林束学智林四新宋俊杰
Owner CCCC THIRD HARBOR ENG
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