New and old pavement base lap joint structure

Abstract

The invention relates to the technical field of road traffic engineering construction, in particular to a new and old pavement base lap joint structure which comprises a roadbed, an old pavement bodyand a new pavement body, wherein the old pavement main body and the new pavement main body are both arranged on a roadbed, the old pavement main body comprises an old pavement supporting layer and anold pavement layer, a first step is excavated on the end surface of the old pavement supporting layer, a second step is formed between the end surface of the old pavement supporting layer and the endsurface of the old pavement layer, and a third step is excavated on the end surface of the old pavement layer; the new pavement main body comprises: a new pavement main body; a new roadbed layer, a new road support layer and a new pavement layer, the upper surface of the new roadbed layer is flush with the bottom surface of the first step; the new road supporting layer is laid on the upper surfaceof the new road base layer and the bottom face of the first step, expansion joints are reserved between the end face of the new road supporting layer and the side face of the first step, the new roadsurface layer is laid on the upper surface of the new road supporting layer, and the end face of the new road surface layer is attached to the end face of the old road surface layer. The method has the effect that joints of new and old pavements are not prone to generating gaps.

Description

technical field [0001] The invention relates to the technical field of road traffic engineering construction, in particular to a new and old pavement base overlapping structure. Background technique [0002] With the development of society and economy, the traffic volume of expressways is increasing day by day, and the traffic volume of some expressways has reached saturation, and the congestion phenomenon is serious. In order to solve this phenomenon, widening expressways is an economical and effective way. In most cases, road widening requires lapping of old and new asphalt pavement. [0003] A Chinese invention patent with a notification number of CN107178018A has been retrieved, which discloses a new and old asphalt pavement overlapping structure, including old pavement, new pavement, modified hot asphalt, polyester fiberglass cloth and anti-cracking stickers. The old pavement It includes an old pavement base and an old pavement surface, and the edge of the old pavement...

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned existing technical solutions have the following defects: since there is no gap between the old pavement surface and the new pavement surface, and the main material of the old pavement surface and the new pavement surface is still concrete, in hot weather or cold weather, Concrete will expand with heat and contract with cold, so it will directly lead to gaps at the joints of old and new pavements, so it needs to be improved

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