动水位下砂砾体围堰渗流及稳定性分析  

Analysis of the seepage and stability of gravel cofferdam under the dynamic water level

作　　者：刘昌平 罗伟 谭叶拓 胡云卿 熊含威 LIU Changping;LUO Wei;TAN Yetuo;HU Yunqing;XIONG Hanwei(Jiangxi Road and Port Engineering Co.,Ltd.,Nanchang 330006,Jiangxi,China;School of Civil Engineering,East China Jiaotong University,Nanchang 330013,Jiangxi,China;Jiangxi Port Group Co.,Ltd.,Nanchang 330008,Jiangxi,China;Jiangxi Vocational and Technical College of Transportation,Nanchang 330013,Jiangxi,China;Jiangxi Provincial Institute of Transportation Research Co.,Ltd.,Nanchang 330200,Jiangxi,China)

机构地区：[1]江西省路港工程有限公司,江西南昌330006 [2]土木建筑学院华东交通大学,江西南昌330013 [3]江西省港口集团有限公司,江西南昌330008 [4]江西省交通职业技术学院,江西南昌330013 [5]江西省交通运输科学研究院有限公司,江西南昌330200

出　　处：《矿产与地质》2025年第1期184-193,共10页Mineral Resources and Geology

基　　金：国家自然科学基金项目(编号:52268063、52108320);江西省自然科学基金项目(编号:20224BAB204063);江西省交通运输厅科技项目(编号:2020Z0001、2021Z0004、2021H0042)共同资助。

摘　　要：以江西省某航电枢纽在建工程中上游围堰作为研究对象,考虑不同高度水位下的稳定渗流、不同水位上升及下降速度下的非稳定渗流,针对围堰体中轴面的水力特性变化,分析渗流流速、孔隙水压力以及堰体稳定性的变化规律。研究结果表明,稳定渗流情形下安全系数随水位的上升而下降;非稳定渗流情形下的水位上升速率越快时,安全系数随水位上升速率的增加变化幅度越小,当上升速度较慢时,安全系数下降幅度越大,且非稳定渗流将接近于稳定渗流;非稳定渗流情形下的水位下降速率较快时,安全系数逐渐降低,随着水位下降时间的增加,安全系数逐渐增加,且增加幅值逐渐趋于平缓,但是安全系数介于前后水位对应的安全系数之间。The upstream cofferdam of a navigation-power junction in Jiangxi Province is taken as the research object,for the consideration of the steady seepage at different water levels and the unsteady seepage at different rising and falling speeds of water levels,the variation regularity of seepage velocity,pore water pressure and weir stability are analyzed according to the change of hydraulic characteristics of the axial plane of the cofferdam.The research result shows that the safety factor decreases with the increase of water level in the case of stable seepage.The faster the rising rate of water level in the case of unsteady seepage,the smaller the change range of safety factor with the increase of water level rising rate,and the larger the decrease range of safety factor when the rising rate is slow,and the unsteady seepage will be close to the stable seepage.In the case of unsteady seepage,when the water level drops rapidly,the safety factor gradually decreases,and with the increase of water level falling time,the safety factor gradually increases,and the increase amplitude gradually tends to be flat,but the safety factor is between the safety factors corresponding to the water level before and after.

关 键 词：砂砾体围堰 动水位 渗流特征 稳定性计算 

分 类 号：TU42[建筑科学—岩土工程]