Study of the curative role of “Draas” in evacuating dunes threatening roads in the Lower Algerian Sahara: physical model on a smaller scale

Sand drifting on road networks in the region of the Lower Algerian Sahara is one of the main problems for the sector. Machines are repeatedly deployed to overcome this phenomenon. The long experience acquired while dealing with the removal of sand from roads pushed us to focus on obstacles called “D...

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Bibliographic Details
Published inArchives of civil engineering Vol. 64; no. 4; pp. 15 - 35
Main Authors Sebaa, A. K., Belhamra, M.
Format Journal Article
LanguageEnglish
Published Warsaw Sciendo 01.12.2018
De Gruyter Poland
Polish Academy of Sciences
Subjects
anti-sand walls
Computer simulation
Lower Algerian Sahara
Model testing
Optimization
Protective structures
reduced model
Road networks
Roads
sand drifting
Transportation networks
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Summary:Sand drifting on road networks in the region of the Lower Algerian Sahara is one of the main problems for the sector. Machines are repeatedly deployed to overcome this phenomenon. The long experience acquired while dealing with the removal of sand from roads pushed us to focus on obstacles called “Draas”. The purpose of this study is to perform an optimization of these special protective structures called “Draas”, using a reduced physical model. Model tests were performed in flow channel. The principle of modeling the wind transport using a reduced model is to simulate the wind using a liquid stream while respecting the laws of hydraulic and sedimentological similarity. The results obtained are extrapolated to make a normal size prototype.
ISSN:1230-2945
2300-3103
1230-2945
DOI:10.2478/ace-2018-0042