深圳大学学报（理工版）2025，Vol.42Issue(5)：550-557,8.DOI:10.3724/SP.J.1249.2025.05550
水泥-石膏-粉煤灰联合提升高氯盐环境成桩质量
Improvement of pile formation quality in high-chloride environments using a cement-gypsum-fly ash composite curing agent
摘要
Abstract
To evaluate the effectiveness of cement-gypsum-fly ash combined curing agent in improving the quality of high-pressure rotary piles under high chloride salt conditions,a series of mechanical property tests and microstructural observation of pile core specimens are conducted.These include unconfined compression tests,scanning electron microscope and X-ray diffraction tests,along with theoretical calculations of pile bearing capacity.The influence mechanism of each curing agent and the enhancement effect of combined curing agent on the final quality of pile formation are examined.The results show that,under the high chloride salt environments,simply increasing the cement dosage does not significantly improve the unconfined compressive strength(UCS)of the specimens;the use of cementitious curing agent will improve the microstructural compactness of the specimens,which will in turn improve the UCS of the pile and the structural integrity of the pile under load.However,excessive fly ash content inhibits the hydration process of the curing agent,leading to reduced strength of the specimen.Theoretical calculations show that piles treated with cementitious curing agent meet the requirements of the monopile load capacity.These findings provide valuable guidance for the engineering practice of high-pressure rotary pile disposal of soft ground with high chloride salt content.关键词
混凝土/粉煤灰/路基处理/高含盐软土/微观结构/无侧限抗压强度Key words
concrete/fly ash/subgrade treatment/high salinity soft soil/microstructure/unconfined compressive strength分类
建筑与水利引用本文复制引用
孙建诚,吴万博,刘军勇,尹利华,张超..水泥-石膏-粉煤灰联合提升高氯盐环境成桩质量[J].深圳大学学报（理工版）,2025,42(5):550-557,8.基金项目
National Natural Science Foundation of China(52078182) 国家自然科学基金资助项目(52078182) （52078182）
