【摘要】 在文章规律(Ⅰ)基础上,进一步分析了海床软弱结构面断裂损伤对液化贯通带形成的影响,建立了海床土体在损伤及孔隙水压联合作用下的Mohr-Columb破坏准则。并在微元体强度服从Weibull分布前提下,通过将损伤因子与液化带贯通临界概率相结合,揭示了液化突变的必然性和可确定性。提出了土体临界液化孔压比uw/uf概念,进而引入uw/uf对液化规律进行分析,找到了不同土质海床的临界液化判别准则及其影响因素,准则对海洋工程地质灾害预测预报具有一定的指导意义。更多还原

【Abstract】 On the basis of the published paper( I),the impact of the seabed soil structure surface rupture on the formation of the liquefied rupture band was further analyzed and a Mohr-Columb failure criterion of seabed soil under the combined effects of the micro-damage and pore water pressure was established. Under Weibull distribution conditions of micro-element strength,the inevitability and certainty characteristics of liquefied mutation were revealed through combination of the damage factor and the liquefied critical probability of the liquefied rupture band.The concept of critical pore pressure ratio uw/ ufof soil liquefaction was put forward. Using this method,the judgment standards for critical liquefaction of different seabed soil and its influencing factors were found. The criterion law has a great significance for the forecast of marine engineering geological disasters.更多还原