Mechanistic-empirical method of pavement design extending unsaturated soil mechanics

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Transportation Geotechnics Pub Date : 2025-04-17 DOI:10.1016/j.trgeo.2025.101569

Kenneth O. Omenogor , Won Taek Oh , Sai K. Vanapalli

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引用次数: 0

Abstract

Pavement system that typically constitutes of different soil and material layers is located within the vadose zone that is above the groundwater table, which is in an unsaturated condition. Due to this reason, suction is a crucial stress state variable for interpreting the behavior of pavements in the vadose zone. The Mechanistic-Empirical Pavement Design Guide (MEPDG) serves as a comprehensive design tool that accounts for both the resilient response and environmental influences on pavement material properties. In this study, a series of California Bearing Ratio (CBR) tests were conducted on both saturated and unsaturated compacted soils that are commonly used as pavement subgrade materials in Toronto, Ontario. A modified CBR apparatus was utilized, incorporating orifices drilled into the CBR mold to monitor matric suction, ψ and water content using MPS-6 (or TEROS-21) and EC-5 sensors, respectively. The measured CBR and ψ values along with resilient moduli were then used to develop correlations to estimate resilient modulus, M_R of compacted soils required for Level 2 design in the MEPDG. The modified CBR testing procedures used in this study are anticipated to be applicable to other soils for estimating M_R, aiding in the design of pavement subgrade materials.

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来源期刊

Transportation Geotechnics Social Sciences-Transportation

CiteScore

8.10

自引率

11.30%

发文量

194

审稿时长

51 days

期刊介绍： Transportation Geotechnics is a journal dedicated to publishing high-quality, theoretical, and applied papers that cover all facets of geotechnics for transportation infrastructure such as roads, highways, railways, underground railways, airfields, and waterways. The journal places a special emphasis on case studies that present original work relevant to the sustainable construction of transportation infrastructure. The scope of topics it addresses includes the geotechnical properties of geomaterials for sustainable and rational design and construction, the behavior of compacted and stabilized geomaterials, the use of geosynthetics and reinforcement in constructed layers and interlayers, ground improvement and slope stability for transportation infrastructures, compaction technology and management, maintenance technology, the impact of climate, embankments for highways and high-speed trains, transition zones, dredging, underwater geotechnics for infrastructure purposes, and the modeling of multi-layered structures and supporting ground under dynamic and repeated loads.