高原农业2025，Vol.9Issue(6)：748-755,8.DOI:10.19707/j.cnki.jpa.2025.06.008
冻融循环作用下PVA改良粗粒土无侧限抗压强度劣化规律研究
A Study of Unconfined Compressive Strength of Coarse-grained Soil Improved by PVA under Freeze-thaw Cycle
摘要
Abstract
The instability and collapse of coarse-grained soil slopes caused by freeze-thaw cycles are typical hazards in engineering construction in the southeastern Xizang region.The strength degradation of coarse-grained soil under freeze-thaw conditions is one of the key factors triggering this problem.To improve the freeze-thaw stability of coarse-grained soil slopes in southeastern Xizang,this study takes the coarse-grained soil in Bomi County as the research object and uses polyvinyl alcohol(PVA)for its modification and reinforcement.Through unconfined compressive strength tests under freeze-thaw cycle conditions,it analyzes the influence laws of different PVA contents,freeze-thaw cycle times and curing periods on the strength of the modified soil,and determines the optimal PVA content ratio.The research results can provide technical support for the design and construction of modified coarse-grained soil slopes in southeastern Xizang,thereby ensuring the safety and stability of engineering construction in this region.关键词
粗颗粒土/聚乙烯醇(PVA)/冻融稳定性/无侧限抗压强度/藏东南地区Key words
Coarse-Grained Soil/Polyvinyl Alcohol(PVA)/Freeze-Thaw Stability/Unconfined Compressive Strength/Southeastern Xizang分类
建筑与水利引用本文复制引用
李超,徐瑞矫,罗敬松,王培清..冻融循环作用下PVA改良粗粒土无侧限抗压强度劣化规律研究[J].高原农业,2025,9(6):748-755,8.基金项目
国家自然科学基金区域创新发展联合基金重点支持项目(U22A20594) （U22A20594）
西藏自治区科技厅自然基金重点项目(XZ202201ZR0068G). （XZ202201ZR0068G）
