Expressway reconstruction and extension construction method for chambering bridge section

Abstract

The invention discloses an expressway reconstruction and extension construction method for a chambering bridge section, and relates to the technical field of expressway reconstruction and extension. According to the construction method, the original roadbed pavement part is utilized and is spliced with the newly-built widening part bridge, so that the roadbed and the bridge are jointly kept through in the reconstruction and extension construction period, the project investment is saved, and the requirement of smooth and kept through of the expressway in the construction period is met. Meanwhile, the transition block is arranged between the original roadbed and the newly-built widening part bridge, so that the rigidity transition of the spliced section is smooth, the rigidity transition of the roadbed and the bridge is smooth due to the gradual change of the rigidity of the concrete transition block on the whole section after splicing, and the driving safety and comfort can be guaranteed. According to the method, on the premise that the construction cost is basically not increased, the traffic keeping problem of the chambering bridge road section is solved.

Description

technical field [0001] The invention relates to the technical field of reconstruction and expansion of expressways, in particular to a construction method for reconstruction and expansion of expressways aimed at expanding bridge sections. Background technique [0002] With the rapid development of my country's economy and society, the traffic volume continues to increase, and the demand for high-speed traffic continues to increase. Expressway reconstruction and expansion projects have gradually become the mainstream of expressway construction. In order not to affect the normal traffic operation as much as possible during the construction period of the reconstruction and expansion project, the design of traffic protection is particularly important. With the increase of traffic demand for local production roads, in the reconstruction and expansion of bridges across local production roads on expressways, the number of bridges that need to be expanded (that is, roads and bridges...

AI Technical Summary

Problems solved by technology

[0004] ① Close one-way traffic, only guarantee one-way traffic

It is difficult to ensure the high-speed driving of vehicles by using temporary steel temporary bridges in Baotong Bridge. The Baotong Bridge adopts concrete or steel box girder bridges, and it is difficult to reuse after the Baotong Bridge is completed. Although this kind of Baotong guarantees the normal operation of traffic, it greatly increases the project cost.

[0007] The main reason for the many problems and shortcomings of the current protection scheme is that it cannot solve the problem of the safety of vehicles driving on roads with different rigidities to form an overall protection section with the same rigidity as the newly-built reaming part on the outside and the original subgrade road surface on the inside.

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