长江科学院院报2024，Vol.41Issue(3)：110-117,8.DOI:10.11988/ckyyb.20221154
黏土中的孔压测试试验及其传递滞后机理
Experimental Research on Pore Pressure and Transfer Mechanism in Clay
摘要
Abstract
The transmission of pore water pressure in saturated clay is the foundation for analyzing geotechnical engi-neering problems.Delays in the transmission process and factors influencing the delay have attracted wide atten-tions.A testing apparatus was designed to examine the transfer of pore pressure by applying hydraulic pressure to consolidated saturated clay.Subsequently,a numerical model was established to simulate the transfer process of pore water pressure.The results reveal noticeable hysteresis in the transmission of pore pressure in saturated clay,with the duration of hysteresis increasing in proportion to the consolidation pressure.Pore water compression coeffi-cient and soil permeability coefficient are primary factors affecting the hysteresis of pore water pressure transfer.Ad-ditionally,further numerical simulations demonstrate that an increase in pore water compression coefficient or a de-crease in soil permeability leads to an extended lag time in pore pressure transfer.Specifically,when the pore water compression coefficient exceeds 10-5 kPa-1 and the soil permeability coefficient is lower than 10-8 m/s,the lag time variations become more pronounced.关键词
饱和黏土/孔压传递/滞后时长/孔隙水压缩系数/渗透系数Key words
saturated clay/pore pressure transfer/hysteresis time/pore water compression coefficient/permeabili-ty coefficient分类
建筑与水利引用本文复制引用
唐逸凡,曹小为,李明,崔灿,宋林辉..黏土中的孔压测试试验及其传递滞后机理[J].长江科学院院报,2024,41(3):110-117,8.基金项目
国家自然科学基金面上项目(51578164) （51578164）
江苏省研究生科研与实践创新计划项目(KYCX22-1280) （KYCX22-1280）
