论文部分内容阅读
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。
According to the actual exploration data and indoor soil test results, according to the theory of limit equilibrium and linear wave theory, the possibility of liquefaction of modern Yellow River subaqueous sand under earthquake and wave dynamic factors is analyzed. According to the essence of liquefaction process Is the pore water pressure generation, development and dissipation process, summed up the sand soil liquefaction mode should include four stages; (1) compaction stage: the pore water pressure increases to sand itself strength, the relative displacement of particles; (2) ) Initial liquefaction stage: the pore water pressure rises to the side of the soil subjected to lateral pressure, resulting in greater strain; (3) complete liquefaction stage: the pore water pressure rises to the overlying effective stress of the soil, 4) collapse formation stage: pore water pressure dissipated.