Effectiveness of Hybrid Geosynthetic Systems in Controlling Differential Heave in Flexible Pavements over Expansive Soils-Reference-Cited by-同舟云学术

Effectiveness of Hybrid Geosynthetic Systems in Controlling Differential Heave in Flexible Pavements over Expansive Soils

Published:2023-09-29 Issue:4 Volume:3 Page:989-1003
ISSN:2673-7094
Container-title:Geotechnics
language:en
Short-container-title:Geotechnics

Author:

Tamim Mir Md.¹^ORCID,Mishra Debakanta²^ORCID,Chittoori Bhaskar C. S.³^ORCID

Affiliation:

1. Idaho Transportation Department, Boise, ID 83714, USA

2. School of Civil and Environmental Engineering, Oklahoma State University, Stillwater, OK 74078, USA

3. Department of Civil Engineering, Boise State University, Boise, ID 83725, USA

Abstract

The challenge of maintaining ride quality and serviceability in flexible pavements built over expansive soil deposits remains a critical concern for transportation agencies. These expansive subgrades exhibit swell-shrink behavior in response to moisture fluctuations, leading to differential heaving and subsequent costly maintenance. This paper explores the effectiveness of a Hybrid Geosynthetic Reinforcement System (HGRS)—a composite of geocell and geogrid—as a targeted mitigation strategy for differential heaving induced by expansive soils. A large-scale box test was designed to simulate a flexible pavement section, consisting solely of a base course layer and the underlying expansive subgrade. Four test conditions were investigated: an unreinforced control, a geocell-reinforced section, a geogrid-reinforced section, and an HGRS-reinforced section. Vertical displacements on the surface of the base course layer were longitudinally monitored and compared against the control. The results reveal that the use of geosynthetic reinforcements, and HGRS in particular, significantly mitigates both maximum surficial heave and differential swelling. Among the systems tested, flexible pavements featuring HGRS demonstrated the most effective performance in alleviating the challenges posed by expansive soil deposits.

Publisher

MDPI AG

Subject

General Medicine

Link

https://www.mdpi.com/2673-7094/3/4/53/pdf

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