Bearing Capacity Assessment on low Volume Roads

2nd International Conference on Innovative Materials, Structures and Technologies

Zari, A.^1

Riga Technical University, Department of Roads and Bridges, Kalku Str. 1, Riga

LV-1658, Latvia^1

关键词: Capacity assessment;    Damaging factors;    Deflection measurement;    Dielectric-constant measurements;    Intensive exploitations;    Low volume roads;    Overloaded vehicles;    Pavement structures;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/96/1/012083/pdf
DOI  :  10.1088/1757-899X/96/1/012083

来源: IOP

【 摘 要 】

A large part of Latvian road network consists of low traffic volume roads and in particular of roads without hard pavement. Unbounded pavements shows serious problems in the form of rutting and other deformations, which finally lead to weak serviceability and damage of the road structure after intensive exploitation periods. Traditionally, these problems have been associated with heavy goods transport, overloaded vehicles and their impact. To find the specific damaging factors causing road pavement deformations and evaluate their prevention possibilities, and establish conditions that will allow doing it, the study was carried out. The tire pressure has been set as the main factor of load. Two different tire pressures have been used in tests and their impacts were compared. The comparison was done using deflection measurements with LWD together with dielectric constant measurements in a road structure using percometer. Measurements were taken in the upper pavement structure layers at different depths during full-scale loading and in different moisture/temperature conditions. Advisable load intensity and load factors for heavy traffic according to road conditions were set based on the study results.