生态学报2026，Vol.46Issue(15)：8429-8441,13.DOI:10.20103/j.stxb.202501070044
新型木质素基凝胶改良砂质土固结能力及其作用机理研究
Research on lignin-based gel for improving the consolidation capacity of sandy soil and its mechanism
摘要
Abstract
Sandy soil,characterized by loose texture and fragile structure,is highly susceptible to erosion,which may induce geological hazards such as loess landslides and soil erosion,and ultimately leading to severe ecological and environmental issues.In this study,a novel LS/PVA/CMC gel consolidator using lignin and other eco-friendly materials was prepared to investigate its consolidation effect in sandy soil application.The experimental results showed that,the excellent water stability was exhibited by the consolidated sandy soil,with structural integrity maintained for over 8 months under optimal immersion conditions.Effective consolidation performance was confirmed through direct shear tests,where chemically cross-linked consolidators were observed to significantly outperform physically cross-linked counterparts.The maximum cohesive force and internal friction angle can reach 610.66 kPa and 48.4094 °,respectively.Enhanced structural stability and compression resistance were revealed by the consolidation tests.The void ratio of the consolidated structure remained at 0.414 after the addition of 2 mL of the gel consolidating agent before compression,representing twice the value recorded in the control test.The results showed that effectiveness of the lignin-based gel consolidated material was effective in improving water retention capacity of the sandy soil,which was verified by the saturated hydraulic conductivity tests.The findings demonstrate that the consolidating agent exhibits effective sand consolidation performance,providing valuable reference for research on sand consolidation,water retention,and soil improvement.关键词
砂土/凝胶固结剂/水稳性/抗剪强度/木质素Key words
sand soil/gel consolidation agent/water stability/shear strength/lignin引用本文复制引用
贾坤腾,于芳芯,陈若曦,贺娟妮,孙永昌..新型木质素基凝胶改良砂质土固结能力及其作用机理研究[J].生态学报,2026,46(15):8429-8441,13.基金项目
陕西省重点研发计划项目(2023-ZDLSF-61) （2023-ZDLSF-61）
