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April 2019

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> The ICA - ITECH - RINCENT BTP SERVICES - ROAD & D group has been working since mid-2018 on the development of a road reinforcement guide for AGEROUTE in Senegal.

The principles of   the    approach    are    based   on   in   situ investigations, mainly  pavement  surveys  that  will  lead  to  an assessment   of   the   existing    roadway    and    its   need   for reinforcement.

The rational method proposed is based on the French standard method adapted to the context of Senegal by taking into account existing local recommendations and references.

The main input parameters are:

> truck  traffic  characteristics:  axle  load,  traffic  intensity  and aggressiveness,

> the characteristics of the roadway to be reinforced and its foundation.  This  information   is  the   result  of  a  prior  testing program,

> the economic parameters of road policy such as the level of service, the maintenance cycles, etc,

> the usual reinforcement techniques.

 

The first step is to analyze the state of the art in Senegal from the available elements, such as the existing reinforcement studies, the traffic studies, the behavior of the pavements in service. On the ground, sections of   roadways representative  of  the degraded   routes   of   the   road   network will  be chosen  and examined. The analysis of the results will make it possible to model the structures in place and to calculate the reinforcement necessary to satisfy the fixed criteria. This   process   will  lead  to  the development  of  a  method  of reinforcements design and classification of road sections in terms of required works.

The assignment is planned over a period of 20 months.

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