路基
岩土工程
土壤水分
变形(气象学)
材料科学
地质学
复合材料
土壤科学
作者
Xuanxuan Chu,Andrew Dawson,Nick Thom,Hongzhen Chen,Lei Qin
标识
DOI:10.1016/j.cscm.2024.e03099
摘要
Excess permanent deformation of subgrade may cause critical rutting in pavements, and subsurface water significantly affects the accumulation of permanent deformation. This study aims to reveal the permanent deformation behaviour of unsaturated subgrade soils. Subgrade box tests were performed at varying moisture content, stress levels and loading frequency, respectively. The test results show that the permanent deformation significantly increased with moisture content. The concept of a permitted moisture content-applied dynamic load envelope was proposed. Based on curve fitting, a prediction model of permanent deformation of subgrade soils was developed, and the effects of moisture content and loading cycles were included. The validation results show that the model exhibited reasonably good performance in modelling the deformation. This study may provide an alternative way for predicting the permanent deformation of unsaturated subgrade soils.
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