Subgrade paving structure and construction method for highway extension

Abstract

The invention discloses a roadbed paving structure for highway extension and a construction method of the roadbed paving structure for the highway extension. The roadbed paving structure for the highway extension comprises a cushion layer, a lower base layer, an upper base layer and a surface layer, wherein a fixing frame is arranged between an intermediate layer and a gravel layer to increase thebonding strength of the upper base layer and the lower base layer so as to prevent hierarchical separation, furthermore, the cushion layer is located at the bottom layer, thereby being capable of enhancing the structure stability and dispersing the roadbed stress to prevent sinking, a traction part is arranged between the surface layer and the upper base layer to increase the bonding strength between the layers so as to prevent the surface layer from being separated, wherein one or more of steel wires, manila hemp fibers, carbon fibers and polytetrafluoroethylene fibers are arranged inside the traction part, therefore the materials are combined to make the traction part tough and corrosion-resistant, and then the traction part is not easily corroded by cement, and in addition, the problemof weak adhesive force of the polytetrafluoroethylene fibers and the cement or asphalt is solved. A connecting part is further arranged and comprises a plurality of dovetail grooves and clamping blocks adapted to the dovetail grooves, the dovetail grooves and the clamping blocks are respectively arranged on a joint surface of an old road and the roadbed structure to prevent a newly widened roadbed from sinking or cracking or separating relative to the old road.

Description

technical field [0001] The invention relates to the field of expressway reconstruction and expansion engineering, more specifically, the invention relates to a roadbed laying structure and construction method for highway extension. Background technique [0002] With the advancement of science and technology and the rapid development of the economy and society, people's living standards continue to improve, and high-speed travel is becoming more and more frequent. It is necessary to expand road traffic capacity to meet people's travel needs. Expansion on the basis of the original expressway lane not only saves cost, but also tests the technology. When the road cannot adapt to the increasing traffic volume, the original road needs to be widened. Existing road widening construction method usually is to pave the materials such as gravel and cement or asphalt after the road edge that needs widening is leveled and then compacted to form a new roadbed. Due to the differences in ma...

AI Technical Summary

Problems solved by technology

In order to solve the problem of cracking, and however, the cement concrete pavement often has poor flatness, and the water permeability of cement concrete is poor. Therefore, in the rainy and snowy season, the pavement is more likely to accumulate water, which affects the driving comfort of the vehicle and makes the Traffic accidents occur frequently, so it is necessary to develop a road structure with a stable structure and good drainage

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