考虑洪水浸泡的黄河下游堤防稳定性预测  

Predict Stability of Immersed Embankments of the Lower Yellow River

作　　者：乔兰[1] 赵宇坤[1] 李庆安 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083 [2]山东黄河勘测设计研究院,山东济南250013

出　　处：《人民黄河》2008年第7期14-15,17,共3页Yellow River

基　　金：河南省创新人才基金资助项目(HNCX200108);国家自然科学基金资助项目(40602034)

摘　　要：对黄河下游堤防土样进行浸泡后的强度试验,探讨了堤防土质在浸水后强度指标的变化规律及堤防稳定情况,并对洪水长时间浸泡后堤防的各项指标进行了预测。结果表明:黄河下游堤防堤身土被洪水浸泡120 h后,黏土的黏聚力降低72.6%,粉土的黏聚力降低62.8%,而两种土的内摩擦角均变化不大,堤防稳定安全系数降低58.2%;堤防土体被洪水浸泡480 h后,黏土压缩系数、压缩模量与浸泡120 h时相当,稳定安全系数降低73.4%。The paper conducts tests on intensity of immersed soil sample of embankments of the lower Yellow River,approaches variation rule of intensity index of soil and stability of embankments after immersing and predicts each index of long-period immersed embankment.The outcomes show that the cohesive force of clay reduces 72.6% and the silt loam 62.8%,the variation of angle of internal friction is not great and the safety factor of embankment reduces 58.2% after 120 hour immersion and;the coefficient of compressibility of clay and compressional modulus are similar with that of 120 hour immersion and the safety factor reduces 73.4% after 480 hour immersion.

关 键 词：堤防 土工试验 黏聚力 稳定安全系数 黄河下游 

分 类 号：TV871[水利工程—水利水电工程] TV882.1