中外公路2025，Vol.45Issue(1)：53-59,7.DOI:10.14048/j.issn.1671-2579.2025.01.006
脲酶诱导碳酸钙沉淀对盐渍土冻胀特性的影响
Influence of Urease-Induced Calcium Carbonate Precipitation on Frost Heave Characteristics of Saline Soil
摘要
Abstract
This study investigated the impact of the soybean urease-induced calcium carbonate precipitation(SICP)technique on frost heave characteristics of saline soil,specifically addressing the frost heave in saline soil used as a subgrade.The relationships between compaction degree,moisture content,volume ratio of the reaction liquid,and curing temperature with the frost heave rate of treated soil were explored.The results show that SICP significantly reduces the frost heave rate of soil samples by over 28%,with the most noticeable improvement occurring under conditions of higher compaction degree and lower moisture content.Additionally,the increased volume ratio of reaction liquid enhances reaction efficiency,while lower curing temperatures are crucial for maintaining urease activity,both of which contribute to the precipitation of calcium carbonate and thereby improve the resistance of saline soil to frost heave.Sensitivity analysis indicates that moisture content and volume ratio of reaction liquid have a significant impact on the frost heave rate of saline soil,while compaction degree and curing temperature exert lesser effects.In conclusion,the SICP technique has been proven to be effective for mitigating frost heave in saline soil,providing insights for subgrade engineering in cold and arid regions.关键词
路基工程/盐渍土/冻胀特性/大豆脲酶/敏感性分析Key words
subgrade engineering/saline soil/frost heave characteristic/soybean urease/sensitivity analysis分类
交通工程引用本文复制引用
李崛,温自丽,刘正楠..脲酶诱导碳酸钙沉淀对盐渍土冻胀特性的影响[J].中外公路,2025,45(1):53-59,7.基金项目
国家自然科学基金资助项目(编号:52208426) （编号:52208426）
重庆市自然科学基金资助项目(编号:CSTB2024NSCQ-MSX1177) （编号:CSTB2024NSCQ-MSX1177）
