摘要
根据实际勘探资料及室内土工试验结果，按极限平衡理论和线性波动理论等，分析了现代黄河水下三角洲砂土在地震和波浪动力因素的作用下发生液化的可能性，并根据其液化过程实质是孔隙水压力产生、发展和消散的过程，总结出砂土液化模式应包括四个阶段；（１）压密阶段：孔隙水压力升高至砂土本身强度，使颗粒产生相对位移；（２）初始液化阶段：孔隙水压力升至土层所受侧向压力，产生较大应变；（３）完全液化阶段：孔隙水压力升至土层上覆有效应力，产生喷水冒沙现象；（４）塌陷形成阶段：孔隙水压力消散。
Based on practical exploration and the laboratory test, the possibility of sandy soil liquefaction in the modern Huanghe subaqueous delta induced by earthquake and wave is analyzed by using the limit equilibrium and linear wave theory. The mechanism of liquefaction is closely linked to the generation, development and dissipation of pore water pressure, and the course of liquefaction is devided into four stages: (1) densification, (2) primary liquefaction, (3) complete liquefaction and (4) collapse formation.
基金
国家自然科学基金
