Bridge swivel design and construction method in extremely asymmetric state

A construction method and asymmetric technology, applied in the direction of bridge construction, bridges, erection/assembly of bridges, etc., can solve the difference in length, the asymmetry of the swivel beam sections on both sides of the spherical hinge, the swivel bridge without anchoring system, etc. problems to reduce security risks and avoid amplification effects

Active Publication Date: 2018-02-16
中铁武汉勘察设计院有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the large unbalanced bending moment due to the asymmetry of the swivel beam sections on both sides of the ball joint and the great

Method used

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  • Bridge swivel design and construction method in extremely asymmetric state
  • Bridge swivel design and construction method in extremely asymmetric state
  • Bridge swivel design and construction method in extremely asymmetric state

Examples

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Embodiment

[0041] A bridge adopts a 95+105m swivel steel box girder to cross the iron, and the total width of the bridge deck is 51m. Carry out horizontal swivel construction of unequal span steel box girders, the swivel length is 43.8+91.4m, and the swivel weight is about 8600 tons.

[0042] In order to realize the bridge rotation with extremely asymmetrical span, in addition to arranging the traditional swivel center spherical joint on the top of the pier, an auxiliary support system is installed at the position 23.6m away from the center of the spherical joint at the end of the 91.4m long arm.

[0043] The curved track beam is a steel box structure, which is a steel box with a height of 2m in general, and the beam height in the area passing through the door opening is increased to 3m. Steel pipe columns and concrete pile foundations are set up under the track beam. The out-of-shape track slab is welded to the track beam to form a whole. The roller trolley is supported on the profiled...

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Abstract

The invention relates to a method of finishing bridge swivel design and construction through arrangement of an auxiliary supporting system in an extremely asymmetric state. The method mainly aims at avoiding the situation that swivel balance is difficult to achieve only depending on arrangement of a balance weight at the end of a beam when the imbalance bending moment of a swivel bridge is relatively large. According to the method, besides a swivel center spherical hinge, the auxiliary supporting system is arranged in the position certain distance away from the center spherical hinge at the bottom of a long swivel arm side beam and matched with a balance weight at the top of a short swivel arm side beam to act jointly, so that balance and stability in the imbalance structure swivel processare kept. The auxiliary supporting system is arranged below a main beam in the position corresponding to the auxiliary supporting system, a beam bottom supporting column is arranged above an idler wheel trolley, and a main beam and the idler wheel trolley are connected through a bogie frame. The idler wheel trolley is supported on an arc-shaped track beam, and a rack is welded to the track beam.Power driving is supplied by a variable frequency motor and a speed reducer, transmission is conducted through a gear and the rack, the bogie frame is driven by a speed reducer frame, the idler wheeltrolley is driven by the bogie frame to move along the track beam, and therefore the main beam is driven to rotate.

Description

technical field [0001] The invention relates to the technical field of bridge design and construction, in particular to a design and construction method for completing bridge rotation by setting an auxiliary support system in an extremely asymmetrical state. Background technique [0002] With the development of our country's society and economy, the number of cars keeps increasing, and the resulting traffic congestion in large and medium-sized cities is also becoming more and more serious, which has become a bottleneck restricting urban development. In order to alleviate the current situation of urban traffic congestion, the construction of municipal infrastructure has also entered a period of construction climax in recent years. [0003] For large central cities, the railway traffic is generally relatively developed, often forming a trend of railway siege. While the railway brings convenience, it also has a certain impact on the construction and development of the city. Du...

Claims

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Application Information

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IPC IPC(8): E01D21/08
CPCE01D21/08
Inventor 肖宇松陈红兵马行川邹向农毛李伟陈冠琪
Owner 中铁武汉勘察设计院有限公司
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