Old concrete pavement widening transformation method

Abstract

The invention discloses an old concrete pavement widening transformation method which comprises the following steps: step 1, construction preparation: widening pavement foundation treatment; step 2, excavating a sleeper beam groove of an old pavement, and pouring concrete on a sleeper beam and a lower layer of a broadened pavement; step 3, horizontally planting steel bars on the old pavement, andpouring concrete on the upper layer of the widened pavement; step 4, optimizing construction; wherein a sleeper beam groove in a second step is located under an old road surface, the sleeper beam groove and lower-layer concrete of the broadened road surface are integrally poured when sleeper beam concrete is poured, and the upper surface of upper-layer concrete of the broadened road surface is flush with the upper surface of the old road surface. Concrete sleeper beams are poured below a pavement structure layer of a longitudinal connection part of a new road and an old road and are combined with longitudinal side edge embedded steel bars of the old road. Compared with a traditional step excavation method, the method has the advantages that the connectivity of the widened base layer and the old road is improved, the overall stress of the reconstructed and expanded road surface is ensured, and the differential settlement of the road surface is reduced.

Description

technical field [0001] The invention relates to the technical field of road construction, in particular to a method for rebuilding the width of old concrete road surfaces. Background technique [0002] In recent years, with the rapid development of my country's economy and the continuous acceleration of the urbanization process, the lanes and road widths of existing municipal roads are increasingly unable to meet the growing traffic flow, and the requirements for road performance are also getting higher and higher. The reconstruction and expansion of old municipal roads is particularly important. In the traditional way of connecting new and old roads, excavation steps are often used for connection, and fiberglass grids are added to the longitudinal joints of the surface. [0003] For example, the Chinese invention patent "A roadbed structure and construction method applied to road widening" with the authorized publication number CN105019326A discloses a roadbed structure for...

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Problems solved by technology

[0004] The above method guarantees the integrity of the panel to a certain extent, but in the reconstruction of municipal roads, it is often limited by the construction scope, and the steps cannot be excavated normally, and the fiberglass grid has high requirements for anchorage during the laying process, and the construction is time-consuming and laborious. , affecting the construction quality of widening roads, and easily causing reflection cracks on the surface of the splicing parts

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