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

Abstract

Geosynthetics play a pivotal role in modern infrastructure projects, with geogrids serving as a common choice for enhancing bearing capacity and reducing soil settlement in road construction. This study investigates the influence of density and uniformity coefficients on geogrid-reinforced sandy and gravelly soils through a series of consolidated drained triaxial tests. The research covers six distinct soil types from Lithuania, each characterized by particle size distribution analysis and classified using various standards. A polyester biaxial geogrid is employed, and test specimens are prepared with and without geogrid reinforcement. Triaxial compression tests are performed at different cell pressures, mirroring real-world conditions in road construction. The results highlight the critical role of cell pressure in the reinforcement effect, with higher pressures reducing the geogrid’s influence. The study also emphasizes the importance of soil type, as gravel soils consistently exhibit higher deviatoric stress than sandy soils. Notably, the geogrid enhances cohesion but reduces the angle of internal friction in most cases. Overall, this research provides valuable insights into the intricate interplay between soil properties, geogrid reinforcement, and cell pressure, shedding light on the mechanical behavior of geosynthetic-reinforced soils in road construction applications.

Triaxial Test and Discrete Element Numerical Simulation of Geogrid-Reinforced Clay Soil

“…Scholars employing this method have documented significant findings regarding the mechanical properties of reinforced soils. Zakarka et al conducted studies on geogrid-reinforced coarse-grained soils through triaxial testing and observed that increasing perimeter pressure reduces the effectiveness of geogrid reinforcement [15,16]. Xiaobin et al investigated the shear performance of such soils reinforced with geogrids using large-scale triaxial tests, revealing that geogrids significantly enhance viscous cohesion.…”