Roadbed lap-joint construction technology for asphalt concrete highway reconstruction and extension

Abstract

The invention discloses a roadbed lap-joint construction technology for asphalt concrete highway reconstruction and extension. The roadbed lap-joint construction technology for asphalt concrete highway reconstruction and extension comprises the following steps of 1 old roadbed detection, specifically, the strength of an old roadbed and an old roadbed base layer is measured by adopting a cutting-ring method or a sand pouring method, and the compaction strength of the old roadbed and the old roadbed base layer is obtained; and 2 new roadbed excavation, specifically, following specific operationis conducted according to a detection result in the step 1, when the old roadbed and the old roadbed base layer both reach the roadbed and pavement compaction strength of ordinary high grade highways,sundries on the sides of the old roadbed only need to be removed, and then excavation is conducted towards the outer side along the roadsides of the old roadbed through excavators or manpower. According to the roadbed lap-joint construction technology for asphalt concrete highway reconstruction and extension, through connecting frames arranged in the new roadbed and the old roadbed and connectingparts which are arranged on the upper surfaces of pavement plate bodies and used for hoisting the splicing type pavement plates, the requirements of being high in strength and easy and convenient toinstall can be met, all the plates spliced into the pavement can be connected into a steady whole, and then the steadiness of the foundation is improved.

Description

technical field [0001] The invention relates to the technical field of highway expansion, in particular to a subgrade lap joint construction technology for asphalt concrete highway reconstruction and expansion. Background technique [0002] The spliced ​​road slab is a prefabricated flat pavement slab, which can be easily lifted to the road construction site, spliced ​​and paved on the roadbed, and the road surface can be quickly formed, which can effectively improve the construction efficiency. The existing splicing The design of pavement slabs is relatively traditional, and the connection between them is only through the structural form of bolts. The degree of fastening of the connection is not enough, which affects the integrity of the pavement spliced ​​by it, resulting in defects such as cracking on the pavement. Contents of the invention [0003] The object of the present invention is to provide a kind of asphalt concrete road reconstruction and expansion roadbed lap...

AI Technical Summary

Problems solved by technology

[0002] The spliced ​​road slab is a prefabricated flat pavement slab, which can be easily lifted to the road construction site, spliced ​​and paved on the roadbed, and the road surface can be quickly formed, which can effectively improve the construction efficiency. The existing splicing The design of pavement slabs is relatively traditional, and the connection between them is only through the structural form of the bolt. The degree of fastening of the connection is not enough, which affects the integrity of the pavement spliced ​​by it, resulting in cracks and other defects on the pavement.

Images