Role of Geogrid on Stiffness Capacity of Loose Cohesionless Geomaterial

EasyChair Preprint 15949

Abstract

The present study has been conducted to examine the variation in stiffness capacity with the penetration factor in loose, cohesionless geomaterial under both reinforced and unreinforced conditions using California Bearing Ratio (CBR) testing. Stiffness capacity, a non-dimensional parameter, is conceptualized to quantify the resistance offered by the geomaterial to penetration. The reinforcement was introduced in the form of a geogrid, incorporated at three different depths proportional to the total depth of the CBR mold. Preliminary testing of the geomaterial indicated that the sample is well-graded sand, with a specific gravity of 2.63, an optimum moisture content of 12.32%, and a maximum dry density of 19.57 kN/m³. The inclusion of geogrid reinforcement significantly enhances the stability and strength of the geomaterial, as reflected in improved stiffness capacity. Among the tested reinforcement depths, the placement at h/4 proved to be the most effective in maintaining stiffness capacity. Additionally, jute reinforcement demonstrated some improvement in stiffness capacity compared to unreinforced sections. However, it was less effective than geogrid, particularly at greater penetration levels. Geogrid reinforcement at h/4 depth consistently resulted in reduced penetration, highlighting its superiority as a stabilization material. These findings indicate towards the advantages of geogrid over jute reinforcement, the importance of optimal reinforcement placement depth, and the overall effectiveness of reinforcement in enhancing soil stiffness capacity.

Keyphrases: CBR test, Cohesionless soil, Geogrid, compaction and stiffness, soil dynamics and earthquake engineering

@booklet{EasyChair:15949,
  author    = {Neha Pawar and Yakshansh Kumar and Ashutosh Trivedi},
  title     = {Role of Geogrid on Stiffness Capacity of Loose Cohesionless Geomaterial},
  howpublished = {EasyChair Preprint 15949},
  year      = {EasyChair, 2025}}