弱透水地基上水平铺盖对闸基渗流场的影响研究  

Study on influence of horizontal blanket on seepage field of weakly permeable sluice foundation

作　　者：张晓悦[1] 张晓乐 苏敏 王建新[4] 

机构地区：[1]浙江水利水电专科学校,浙江杭州310018 [2]浙江华东工程安全技术有限公司,浙江杭州310014 [3]浙江省水利水电勘测设计院,浙江杭州310002 [4]中国水电顾问集团华东勘测设计研究院,浙江杭州310014

出　　处：《人民长江》2012年第17期79-82,共4页Yangtze River

基　　金：科技部中奥两国科技合作项目"非饱和土石坝;堆石坝和混凝土坝的长期效应及渗流特性"(CN 01/2007);浙江省教育厅2012年度科研计划项目(Y201224384)

摘　　要：利用饱和-非饱和、稳定-非稳定渗流场有限单元法,建立固定网格的某闸基渗流场计算模型,研究弱透水地基上铺盖的长度和厚度变化对闸基渗流场的影响,以及铺盖止水破坏和铺盖产生裂缝情况下的闸基渗流场。研究表明,在弱透水地基上,水平铺盖对闸基的防渗作用并不明显,在止水破坏或产生裂缝时,增加铺盖厚度反而会导致闸基渗流场形态恶化。建议在弱透水地基上,铺盖的设置只要满足表面防冲要求即可,据此可对水闸设计规范中的相应条文作进一步细化和改进。By using finite element method for saturated - unsaturated, stable - unstable seepage field, a fixed grid model of seepage field calculation of a sluice foundation is established, and the influence of length and thickness of blanket on seepage field of weakly permeable sluice foundation is researched while considering the influence from failure of water sealing and cracks of the blanket. The research shows that the anti - seepage effect of horizontal blanket on weakly permeable sluice foundation is not obvious, and if the water sealing of blanket is damaged or crack appears, increasing blanket thickness will deteriorate the anti - seepage effect of the foundation, therefore the blanket should only be designed for meeting the anti - scour requirement. The cor- responding design code of sluice can be modified according to the research results.

关 键 词：闸基 渗流 弱透水地基 混凝土铺盖 有限单元法 

分 类 号：TV223[水利工程—水工结构工程]