Manuscript Title:

APPLYING MOROCCAN METHOD FOR EVOLUTIONARY STUDY OF THE FLEXIBLE PAVEMENT DEFLECTION BASED ON THE LACROIX DEFLECTOGRAPH RESULTS

Author:

MOHAMMED AMINE MEHDI, TOUFIK CHERRADI, AZZEDDINE BOUYAHYAOUI, SAID EL KARKOURI, MOHAMED QACHAR

DOI Number:

DOI:10.17605/OSF.IO/D4N23

Published : 2022-08-10

About the author(s)

1. MOHAMMED AMINE MEHDI - PhD in Civil Engineering at the Mohammadia School of Engineering, Laboratory of Civil Engineering and Construction, Mohammed V University, Rabat, Morocco.
2. TOUFIK CHERRADI - Professor of Higher Education, Speciality: Civil Engineering, Mohammadia School of Engineering, Laboratory of Civil Engineering and Construction, Mohammed V University, Rabat, Morocco.
3. AZZEDDINE BOUYAHYAOUI - Professor of Higher Education, Specialty: Civil Engineering, Mohammadia School of Engineering, Laboratory of Civil Engineering and Construction, Mohammed V University, Rabat, Morocco.
4. SAID EL KARKOURI - Director of the Moroccan Center for Road Studies and Research (CNER), Rabat, Morocco.
5. MOHAMED QACHAR - Head of Road Studies and Operations Department, Moroccan Road Directorate. Rabat, Morocco.

Full Text : PDF

Abstract

At present, degradation surveys are often insufficient to detect the beginning of damage in thick structures. In addition, it has become necessary to complete them with deformation measurements in order to measure the deflection under the action of a heavy load that allows evaluating the pavement rigidity. These measurements are used on a local scale to estimate the residual life of a pavement or on a route scale to detect homogeneous or degraded areas. In Morocco, the LACORIX deflect graph is used to measure the vertical deformation (deflection) of a pavement under the axle of a heavy vehicle moving at constant speed. This technique is used to monitor road networks and study its evolution under traffic, to detect defective areas to be reinforced and to control the execution and efficiency of the reinforcements. In this regard, and in collaboration with the Moroccan National Center for Road Studies and Research, we propose in this paper a study of the deflections evolution basing on the data analysis related to the auscultations results. The studied section is part of the Moroccan National road number 06, composed of a flexible structure over a length of 50 km connecting the town of Meknes and Khemisset. The results obtained are reduced through a deformation matrix subdivided into four levels of deformation (A: very good, B: good, C: bad, D: very bad) for object of representing the bearing capacity evolution of this pavement using the Moroccan method.


Keywords

Deflection, LACROIX Deflectograph, Moroccan Road, Moroccan, Road Inspection.