Splicing structure and construction method of new and old pavement in super high section of expressway extension project

Abstract

The invention discloses a new and used pavement splicing structure and a construction method for an ultrahigh section in a highway extension project, and aims to solve the problem that an asphalt pavement structure layer is damaged because of impeded drainage of a new and used pavement spliced part of an ultrahigh section in a highway extension project. According to a scheme I, a longitudinal macadam sewer is formed in a spliced part of a new and used asphalt concrete pavement of the ultrahigh section; according to a scheme II, a waterproof sealing layer is arranged between a spliced widening structure layer and a base layer contacting an asphalt concrete surface layer; according to a scheme III, a spliced widening side surface is coated with a layer of hot asphalt. Due to adoption of the waterproof sealing layer, water of the asphalt pavement structure layer of a spliced widening section can be prevented from penetrating into the base layer longitudinally; as a side surface of a used widened part is coated with the hot asphalt, water of the asphalt pavement structure layer of the spliced widening section can be prevented from penetrating into a structure layer transversely; due to adoption of the longitudinal macadam sewer, longitudinal and transverse accumulated water of a spliced asphalt pavement structure layer can be collected. Therefore, the problem of water damage on spliced parts of a new pavement and an old pavement of the ultrahigh section in the highway extension project can be effectively solved.

Description

technical field [0001] The invention relates to the technical field of prevention and control of water damage at the junction of new and old road surfaces in expressway expansion projects, and specifically a comprehensive solution to the problem of water damage at the junction of new and old road surfaces in super-high sections. Background technique [0002] In the process of expressway reconstruction, the treatment measures for the splicing parts of the old and new subgrades have been relatively mature, but there is no set of comprehensive treatment measures for the prevention and control of water damage at the splicing parts. [0003] Due to the difference in characteristics and indicators of the materials of the new and old pavement at the joint width part, it is easy to form a through joint. These joints are important channels for road surface water to enter the pavement structure layer. In non-super-elevation road sections, drainage seepage ditches are generally arrange...

AI Technical Summary

Problems solved by technology

[0013] In order to solve the deficiencies in the prior art, the present invention provides a comprehensive treatment measure for controlling the superelevation road surface to prevent water damage at the splicing part of the superelevation and high side pavement structure layer of the expressway, which is used to solve the superelevation and high side pavement structure of the expanded expressway The problem of pavement damage caused by poor drainage of the splicing parts can prolong the service life of the expanded expressway pavement and reduce future maintenance costs

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