黄河水下三角洲海底斜坡波致稳定性分析  

An Analysis of Wave-Induced Slope Stability in Subaqueous Huanghe Delta Areas

作　　者：李安龙[1] 杨荣民[1] 曹立华[1] 孙映涛[1] 

机构地区：[1]中国海洋大学海洋地球科学学院

出　　处：《中国海洋大学学报（自然科学版）》2004年第2期273-280,共8页Periodical of Ocean University of China

基　　金：山东省自然科学基金 (Q 2 0 0 2 E0 2 )资助

摘　　要：以 Iversion的海底稳定渗流理论为基础 ,运用静力极限平衡方法和库仑破坏准则 ,提出了以海底水下斜坡坡度、沉积物有效内摩擦角和内聚力为自变量 ,波浪在海底产生的孔压梯度为参变量的海底稳定性分析方法。并给出了黄河水下三角洲不同土质所需的临界孔压梯度判断曲线 ,预测了黄河水下三角洲的海底稳定性 。Wave-induced water-head variation may cause steady seepage of pore water in the seabed, producing or leading to instability of the submarine slope. The paper presents a general procedure for the analysis of the relationships among sedimental effective internal friction angle, cohesion, submarine slope angle and critical pore water pressure gradient that causes soils to fail by using a simple limit equilibrium analysis method and the Coulomb failure criterion. The numerical results of critical pore water pressure gradient that causes different soils of the subaqueous Huanghe delta areas to fail are presented in convenient graphical form. Some illustrative field studies are also presented.

关 键 词：黄河河口 三角洲 临界孔压梯度 土工特性 稳定性分析 

分 类 号：P736.213[天文地球—海洋地质] P343.5[天文地球—海洋科学]