Abstract
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.
Highlights
As part of the mission of regular follow-up of the Senegalese’ network of “classified roads’ system”, theHow to cite this paper: Diop, S., Fall, M., Dione, A. and Tijani, M.N. (2015) Diagnosis Study of the Louga-Ouarack-Ndoyene R31 Regional Road (Senegal)
The focus of this paper is to present the methodological approach and the investigations results, the outcome of which can be of advantage to the Senegalese Road Administration as new tools in road diagnosis techniques
In addition a cumulative length of approximately 47,686 m has characteristic deflection” (Cd) values in the C1 and C2 class levels; exhibiting low deflections
Summary
As part of the mission of regular follow-up of the Senegalese’ network of “classified roads’ system”, theHow to cite this paper: Diop, S., Fall, M., Dione, A. and Tijani, M.N. (2015) Diagnosis Study of the Louga-Ouarack-Ndoyene R31 Regional Road (Senegal). How to cite this paper: Diop, S., Fall, M., Dione, A. and Tijani, M.N. (2015) Diagnosis Study of the Louga-Ouarack-Ndoyene R31 Regional Road (Senegal). SENELABO-BTP laboratory conducted a diagnostic study of the R31 regional road, on behalf of AGEROUTESenegal (Agence des Travaux et de Gestion des Routes du Sénégal). Three complementary indicators to provide assessment on the road edifice were analyzed: 1) its structural behavior (viz., the deformability of the road under the effect of a rolling load); 2) the appearance of the road surface characteristic (apparent pavement damages); and 3) the geotechnical properties of the constituent materials of the various layers of the road. The focus of this paper is to present the methodological approach and the investigations results, the outcome of which can be of advantage to the Senegalese Road Administration as new tools in road diagnosis techniques
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