A Construction Method for Expansion of Existing Expressway Rectangular Culvert

Abstract

The invention discloses an expansion construction method for the existing rectangular culverts of the expressway. When the expressway is widened and rebuilt, the original old culverts under the roadbed are generally continued to be extended and used, but some of the original old culverts often cannot meet the design carrying capacity. The usual practice at this time is to remove the old slabs of the culverts that do not meet the requirements and replace them with new ones. In this way, the existing roadbed needs to be excavated, which will inevitably affect the passage of the existing expressway and increase the difficulty of traffic organization. Moreover, for the high-fill roadbed section, the engineering quantity and construction difficulty are extremely great, which will affect the overall construction progress. . By adopting the method, not only the interference to the passage of the existing expressway can be minimized, but also the engineering quantity of roadbed excavation can be reduced, and the construction difficulty can be reduced.

Description

technical field [0001] The invention relates to the technical field of rebuilding and expanding rectangular culverts of highways, in particular to an expansion construction method for existing rectangular culverts of expressways. Background technique [0002] At this stage, with the rapid development of my country's economy and society, and the further improvement of the expressway network, the traffic volume has increased rapidly, showing that the transport capacity of the expressway constructed in the early stage is tight, and the service level has declined seriously. Prominent problems such as mismatching roles in the road network can no longer meet the requirements of sustainable development of economic society and urban and rural construction, and it is imperative to rebuild and expand high-grade highways. [0003] Expressway culverts are structures buried under a certain thickness of subgrade fill for drainage and passage across the road. During the reconstruction and e...

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Problems solved by technology

[0004] The usual way to strengthen expressway culverts is to remove the old culvert slabs that do not meet the requirements and replace them with new slabs. This method is safe and can ensure the safe use of existing culverts after expressway reconstruction and expansion. However, this method requires Excavating the existing highway subgrade will inevitably affect the passage of the existing expressway and increase the difficulty of traffic organization. For the high-fill subgrade section, the engineering quantity and construction difficulty are extremely great, which will affect the overall construction progress

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