IMPROVEMENT OF THE LOAD-BEARING CAPACITY OF THE PLATFORM SOILS OF THIES REGION WITH THE ADDITION OF CEMENT RUBBLE ON THE BASIS OF THE ROAD EARTHWORKS GUIDE (GTR).

Abstract

Having noted a lack of documentation on road earthworks, linked to a lack of national 
standards in Senegal that define the conditions for implementation, the aim of this document is 
to propose a method of development of the soils for the proper execution of the earthworks and 
subgrade. To this end, a study was conducted on the subgrade soils of one of the 14 regions of 
Senegal, namely the region of Thiès, one of the big cities of the country and which is 75 km 
from the Senegalese capital Dakar. Four 2.5-kilometre-long road axes have been selected for 
manual sampling of these platform soils in Thiès, the first axis is in the municipality of Fandène 
located in the North-east of the region, the second in the rural commune of Sanghé located in 
the south of the region, the third in the commune of Mont- Rolland located 12 km north of the 
study area and the last in the rural commune of Khombole located 8 km east of the study area. 
Following the results obtained, we will make a soil improvement with cement rubble at different 
percentage 2.5% and 5%. This cement rubble was collected at the waste recycling site in Thiès 
region.