Analysis of the Traffic Load–induced Stresses of Embankment

Abstract

This article represents traffic loads on the road structure distribution and evaluation of the vertical and horizontal stresses formation in the soil embankment. This evaluation allows to predict the depth and intensity of the propagation of additional stresses resulting from traffic loads. The calculations were performed in accordance with four normative documents applied in Lithuania, which define the loads on the road structure. The obtained results showed that the area to which the load is distributed has the greatest influence on the intensity of stresses and the distance of propagation. The maximum horizontal stress in the embankment was found to be no more than 70 kPa and the maximum stress propagation depth did not exceed 0.9 m. The results can be applied to a triaxial test apparatus to restore horizontal stresses in the embankment. It is recommended to select a lateral pressure from 20 kPa to 70 kPa for tests provided with triaxial test device. The mechanical properties of the soil determined with triaxial test device and recommended lateral pressure would be representative of the test results obtained in the field of embankment.

Triaxial Test of Coarse-Grained Soils Reinforced with One Layer of Geogrid

“…Initially, tests were performed on soils without geogrid reinforcement, followed by tests on geogrid-reinforced soils. Three different cell pressures σ 3 were applied during the consolidation and loading phases: 20, 50, and 70 kPa, which were based on stress calculation for road construction by Zakarka [48]. The conditions for the test were selected according to LST EN ISO 17892-9:2018 [54].…”

“…To address these considerations, the decision was made to employ static loads, aligning with the specifications outlined in standard documents. Subsequently, stress distribution analysis was conducted based on these static loads [48].…”

“…Based on these findings, the aim of the study is to conduct tests that closely simulate road construction conditions. Consolidated drained (CD) triaxial tests were carried out with small confining pressures of 20, 50, and 70 kPa, specifically calculated to replicate realworld road structures [48]. The primary objective is to investigate the influence of density and uniformity coefficient on cohesion, angle of internal friction, and the reinforcement effect for a single layer of geogrid-reinforced sandy and gravelly soils.…”