森林工程2024，Vol.40Issue(4)：218-224,7.DOI:10.7525/j.issn.1006-8023.2024.04.023
海陆交互相软土固结抗剪强度指标变化规律研究
Research on the Variation of Shear Strength Index of Marine-continental Facies Soft Soil after Consolidation
摘要
Abstract
Taking the marine-continental facies soft silty soil in the Pearl River Delta region as the research object,the changing rules of shear strength and shear strength indexes under different consolidation pressures and degrees of consolidation were investi-gated through indoor straight shear tests,and a three-dimensional logistic mathematical model of shear strength and corresponding in-dexes-degree of consolidation-consolidation pressure was proposed.The results showed that:when P≥200 kPa,U≥40%,the growth of soft soil cohesion(c)and internal friction angle(φ)was more obvious;when U=100%,campared to the initial state,the soft soil shear strength(τ)under the action of all levels of consolidation pressure increased by 7.89,12.73,13.50,18.20,22.38 kPa,re-spectively;the given three-dimensional mathematical model can directly calculate the shear strength index and shear strength under a certain consolidation pressure and consolidation degree;the research results can more accurately evaluate the overall stability of the soft soil foundation in this area during the step-by-step loading process.关键词
海陆交互相软土/分级加载/抗剪强度指标/固结度/固结压力Key words
Marin-continental facies soft soil/graded loading/shear strength indexes/consolidation degree/consolidation pressure分类
建筑与水利引用本文复制引用
刘红军,何程铃,陈锋,周志军,杨超..海陆交互相软土固结抗剪强度指标变化规律研究[J].森林工程,2024,40(4):218-224,7.基金项目
国家自然科学基金青年项目(41702323) （41702323）
广东省普通高校特色创新项目(2020KTSCX152) （2020KTSCX152）
江门市基础与理论科学研究类科技计划项目(2020JC01023). （2020JC01023）
