ORIGINAL RESEARCH
Deformation Characteristics of Fiber-Reinforced
Cured Lightweight Soils under Dry and Wet Cycles
and Intermittent Loading
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College of Environmental Science and Engineering, Donghua University, Shanghai, China
Submission date: 2023-07-04
Final revision date: 2023-08-04
Acceptance date: 2023-08-08
Online publication date: 2023-11-07
Publication date: 2023-12-19
Corresponding author
Aiwu Yang
College of Environmental Science and Engineering,, Donghua University, China
Pol. J. Environ. Stud. 2024;33(1):455-466
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ABSTRACT
In practical engineering applications, cured lightweight soils are commonly used as roadbed fillers
and subjected to intermittent and discontinuous traffic loads. However, previous studies primarily
focused on the effects of continuous loading on the mechanical properties of cured soils. To address
this knowledge gap, this study investigated the deformation characteristics of fiber-reinforced cured
lightweight soils under dry and wet cycles and intermittent loading. Dynamic triaxial tests with varying
intermittent ratios and numbers of dry and wet cycles were conducted to assess the influence of these
factors on the accumulated plastic strain of fiber-reinforced cured lightweight soils. Based on the test
results, a prediction model was developed to estimate the accumulated plastic strain of the cured soils
under intermittent loading. The findings indicated that the interval length has a dampening effect on
the accumulated plastic deformation of the soil, thereby improving its ability to resist deformation.
Additionally, the accumulation of plastic deformation gradually increased with the number of wet and
dry cycles but eventually stabilized. In multistage loading, the accumulated plastic strain displayed
a rapid increase and stabilization trend similar to that in observed the first loading stage. However,
the magnitude of the cyclic dynamic stress ratio determines the deformation at later loading stages.
Finally, an improved exponential model was used to establish and validate a prediction model for
the cumulative plastic strain of the fiber-reinforced cured lightweight soil under intermittent loading
(single and multistage). This prediction model provides important guidance for the practical application
of fiber-reinforced cured lightweight soils in engineering projects.