洪水浸泡和水位骤降情况下黄河下游堤防堤岸稳定性分析  

Slope stability analysis of lower reaches?dikes of Yellow River under flood immersion and water level rapid drawdown

作　　者：赵宇坤 刘汉东[2] 李庆安 

机构地区：[1]山东黄河勘测设计研究院,济南250013 [2]华北水利水电学院,郑州450011

出　　处：《岩土力学》2011年第5期1495-1499,共5页Rock and Soil Mechanics

基　　金：国家自然科学基金项目(No.40602034);国家十一五科技支撑计划(No.2009BAK56B04,No.2006BAC14B04)

摘　　要：水库库岸边坡稳定在水位骤降工况下的研究目前已比较成熟,但对黄河下游堤防在水位骤降工况下的堤坡稳定状态却研究甚少。通过选取黄河下游标准化堤防某段堤岸边坡为研究对象,建立有限元渗流模型,提出黄河下游堤防的水位骤降速度标准,同时分析了在水位骤降速度为2、4、5 m/d时的坡内浸润线变化、堤岸稳定性变化,以及在水位骤降组合洪水浸泡最不利工况下的堤岸稳定状态。通过分析,给出水位下降情况、水位下降组合浸泡情况下的堤岸稳定状态图,并从图中可以查出在某一水位下降速度、洪水水位降至某一高程处的堤岸稳定状态,为工程人员在堤防建设中运用和推广提供了便利。Slope stability research under the situation of water level rapid drawdown is much popular for reservoir dike slope;but it is less considered as a working condition in the stability analysis of the Yellow River lower reaches？ dikes.We select a typical section of the lower reaches？ standardized dike as research object,and build a finite element model of saturated-unsaturated seepage.The criteria of rapid drawdown rate for the lower reaches？ dike is put forward;and the changes of saturation lines and slope stability with water level rapid drawdown rate 2 m/d,4 m/d and 5 m/d are analyzed.Meanwhile,the stability situation of the dike slope under the worst working condition,water level rapid drawdown,is analyzed as well.The slope stability diagram under different situations,such as water level rapid drawdown and rapid drawdown combining flood immersing,is presented,and from which the slope stability situation could be checked when at a certain water falling rate and to a certain water level.This method is much convenient in actual application for engineers.

关 键 词：水位骤降 堤岸稳定 黄河下游堤防 洪水浸泡 工况 渗流 

分 类 号：U443.81[建筑科学—桥梁与隧道工程]