长江科学院院报2024，Vol.41Issue(11)：136-143,8.DOI:10.11988/ckyyb.20231317
考虑有效孔隙率变化的淤泥固化土渗透性研究
Permeability Characteristics of Sludge Solidified Soil Considering the Variation of Effective Porosity
摘要
Abstract
To investigate the permeability of sludge solidified soil prepared using a self-developed water glass-based curing agent,the microstructure and pore size distribution characteristics of the soil were analyzed using scanning e-lectron microscopy(SEM)and mercury intrusion porosimetry(MIP)with varying amounts of curing agent.Based on the effective porosity theory,a one-dimensional permeation differential equation was established,and a constant head permeability test scheme for fine-grained soil was proposed and applied to the permeability testing of the solidi-fied soil.Through back pressure saturation and unloading tests,the relationship between the effective porosity rate increment and the pore water pressure function was established,and the permeability parameters of the soil were obtained through constant head permeability testing and numerical calculations.The permeability parameters of the solidified soil were studied with varying curing agent content.The results showed that with increasing amounts of cu-ring agent,both the particle structure and porosity rate of the solidified soil increased.The initial effective porosity rate and starting hydraulic gradient of the solidified soil decreased monotonically,while the absolute effective per-meability coefficient initially decreased and then increased,reaching a minimum value at a curing agent ratio of 7％.关键词
淤泥固化土/有效孔隙率/反压饱和/绝对有效渗透系数Key words
sludge solidified soil/effective porosity/backpressure saturation/absolute effective permeability coef-ficient分类
建筑与水利引用本文复制引用
陶东新,梧松,刘洪涛,陶敏,王政,詹熠楠..考虑有效孔隙率变化的淤泥固化土渗透性研究[J].长江科学院院报,2024,41(11):136-143,8.基金项目
浙江煤炭地质局科技项目(ZMD-2022-02) （ZMD-2022-02）
