水位下降条件下挡土墙参数对渗流特征的影响  

Influence of Retaining Wall Parameters on Seepage Characteristics under Falling Water Level Conditions

作　　者：郭秋金 GUO Qiu-jin(Fuzhou Planning&Design Institute Group Co.,Ltd.,Fuzhou 350108,China)

机构地区：[1]福州市规划设计研究院集团有限公司,福建福州350108

出　　处：《中国市政工程》2023年第5期105-109,127,128,共7页China Municipal Engineering

摘　　要：为研究水位下降条件下挡土墙参数对渗流特征的影响,根据饱和-非饱和渗流理论,采用有限元软件建立几何模型并设置初始条件,分别分析水位骤变时饱和渗透系数、泄水孔布置、挡土墙墙型对渗流特征的影响。结果表明:饱和渗透系数越小,墙后水位滞后于水位越明显;墙后填土为砂性土时泄水孔对土体浸润没有影响,对黏性土影响较大;墙背倾角越大时,墙后水位对水位滞后越明显。To study the influence of retaining wall parameters on seepage characteristics under falling water level conditions,based on the saturated-unsaturated seepage theory,a finite element software is used to establish a geometric model&set initial conditions.The influence of saturated permeability coefficient,discharge hole arrangement,and retaining wall type on seepage characteristics during sudden changes in water level are analyzed.The results show that the smaller the saturated permeability coefficient,the more obvious the lag of water level behind the wall;when the fill behind the wall is sandy soil,the discharge hole has no effect on soil infiltration,but has a significant impact on cohesive soil;the larger the inclination of the wall back,the more obvious the lag of water level behind the wall.

关 键 词：饱和-非饱和理论 渗流特征 重力式挡土墙 孔隙水压力 

分 类 号：TU43[建筑科学—岩土工程]