Multi-parameter coupling effects of root reinforcement on disintegration and swelling behavior of expansive soil: A response surface methodology approach

Yonggang Huang, Hongri Zhang, Xinzhong Wang, Yuexing Wu and Xianliang Tan

PLOS ONE, 2025, vol. 20, issue 11, 1-22

Abstract: This study employs response surface methodology (RSM) integrated with a hybrid Box-Behnken and D-optimal experimental design to unravel the multi-parameter coupling effects of root reinforcement on the hydro-mechanical behavior of expansive soils. The experimental framework systematically investigated root diameter (1–5 mm), length (30–50 mm), quantity (3–5 roots), and distribution patterns (horizontal, inclined, composite), with quantitative assessments of disintegration amount (DA), swelling force (SF), and swelling rate (SR). Key findings reveal that root diameter (X1) and quantity (X4) dominate disintegration control, exhibiting significant main effects (Fx1 = 173.8, Fx2 = 112.9, p

Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:plo:pone00:0335349

DOI: 10.1371/journal.pone.0335349

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