Steep Embankment Treatment Technology of Algeria North-South Expressway

Abstract

The Algeria North-South Expressway from Chiffa to Berrouaghia is located in Blida province and Médéa province in northern Algeria. It is the starting section of Algeria North-South Expressway in the Algeria national arterial highway networks composed of two latitudinal and one longitudinal highway. As an important part of the main highway skeleton in Algeria, the expressway from Chiffa to Berrouaghia is responsible for the main function of traffic conversion between plateau and coastal areas in the country. The project is mostly located in ridges and mountains with large terrain undulating, so the slopes of highway of partial sections are very steep. There are many similarities and differences between Chinese and Algerian highway design specifications or engineering practices in treating steep embankment problems. This paper introduced the main similarities and differences in treating steep embankment problems in China and Algeria, and emphatically introduced the techniques of slide-resistant shovel for treatment of steep slope embankment in Algeria North-South Expressway project. Definition of Steep Embankments There are technical specifications about steep embankments in Specifications for Design of Highway Subgrades (JTG D30-2015) in China. When the slope rate of ground exceeds 1:5 (11.3°),