Expressway anti-scouring roadbed pavement and construction method

Abstract

The invention discloses an expressway anti-scouring roadbed pavement which comprises a broken stone hardcore, an lime-soil layer, a cement stabilized macadam layer, an asphalt layer, protection slopesand back pressure protection channels; the lime-soil layer is arranged at the upper end of the broken stone hardcore; the cement stabilized macadam layer is arranged at the upper end of the lime-soillayer; the asphalt layer is arranged at the upper end of the cement stabilized macadam layer; the protection slopes are arranged on the two sides of the broken stone hardcore, the ash soil layer andthe cement stabilized macadam layer; a back pressure protection channel is arranged on the outer side of each protection slope; the lime-soil layer comprise a first lime-soil layer, a second lime-soillayer and a third lime-soil layer, the first lime-soil layer is arranged on the broken stone hardcore, the second lime-soil layer is arranged on the first lime-soil layer, and the third lime-soil layer is arranged on the second lime-soil layer. By arranging the broken stone hardcore, the protection slopes and the back pressure protection channels, the problems that an existing expressway subgradeand pavement is poor in stability and prone to local collapse due to rain wash, and great hidden dangers are brought to driving are solved.

Description

technical field [0001] The invention relates to the technical field of highway engineering construction, in particular to an anti-scouring subgrade pavement of expressways and a construction method. Background technique [0002] Expressways refer to highways designed for high-speed driving of cars. Expressways are high-grade highways, which can adapt to the annual average day and night passenger car traffic volume of more than 25,000 vehicles, are designed for cars to drive at high speeds in separate lanes, and all access and exit are controlled. The traffic volume of the highway is large, so the quality of the highway construction directly affects the stability and service life of the highway. As an important part of the highway, the highway subgrade plays the role of bearing load and transmitting the load to the ground. The quality of roadbed construction directly affects the performance of the road. Because the expressway needs to carry large-tonnage vehicles and has a la...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention provides an anti-scouring subgrade pavement and construction method of expressway, which solves the problem that the existing subgrade pavement of expressway has poor stability, is easily washed by rainwater and partially collapses, and brings great hidden dangers to driving. The problem

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