A construction method for highway reconstruction and expansion for reaming bridge sections

Abstract

The invention discloses a construction method for highway reconstruction and expansion aimed at reaming bridge sections, and relates to the technical field of highway reconstruction and expansion. The construction method utilizes part of the original roadbed and pavement, and splices it with the newly-built bridges. During the reconstruction and expansion construction, the roadbed and bridges are jointly maintained, which not only saves the project investment, but also achieves the requirements of smooth and smooth expressways during the construction period. At the same time, a transition block is set between the original subgrade and the newly-built bridge, so that the transition of stiffness of the spliced ​​section is smooth. After splicing, the stiffness of the overall section changes due to the gradual change of the stiffness of the concrete transition block, and the stiffness of the subgrade and the bridge transitions smoothly. can be guaranteed. The method solves the problem of maintaining the passage of the reaming bridge section on the premise of basically not increasing the project cost.

Description

technical field [0001] The invention relates to the technical field of highway reconstruction and expansion, in particular to a construction method for highway reconstruction and expansion aimed at reaming 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 of the reconstruction and expansion project, it is particularly important to keep the traffic intact. With the increasing 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 rebuilt (that is, roads and bridges need to be widened at the same time...

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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