Author(s)

Seybatou Diop¹, Meissa Fall², Adama Dione², Moshood N. Tijani³

¹Institut des Sciences de la Terre, Faculté des Sciences et Techniques, Université Cheikh Anta Diop de Dakar, Dakar, Sénégal.
²Laboratoire de Mécanique et Modélisation, UFR Sciences de l’Ingénieur, Université of Thiès, Thiès, Sénégal.
³Department of Geology, University of Ibadan, Ibadan, Nigeria.

The degree of structural damage of the Louga-Ouarack-Ndoyene R31 regional road was surveyed using Lacroix deflectographe and geotechnical testing, in order to recommend possible rehabilitation measures aimed at maintaining the high level of service over the projected life span of the road. The data processing and interpretation were essentially based on the French standards and specifications, through which synthetic variables were generated with a qualitative significance and on the basis of which the extent of repairs and rehabilitation works to be undertaken were suggested. The decision grid thus produced, revealed road structure quality indices of mostly Q3, Q4, and Q5 types for a segment length of 36.954 km (equivalent to some 69.44% of the total road section), which justifies some major reinforcement works. The remaining part of the road section (nearly 30.56% with road quality indices ≤ Q2) is still in acceptable condition, requiring only some minor maintenance works. The rehabilitation costs were estimated to be of the order of 5,352,000,000 (five billion three hundred fifty-two million) CFA francs, based on local market price conditions.

Senegal, Road Diagnosis, Lacroix Deflectograph, Deflection, Reinforcement, Maintenance

Diop, S. , Fall, M. , Dione, A. and Tijani, M. (2015) Diagnosis Study of the Louga-Ouarack-Ndoyene R31 Regional Road (Senegal). Geomaterials, 5, 34-44. doi: 10.4236/gm.2015.51004.