深厚覆盖层混凝土防渗墙挡水性能敏感性分析  

Sensitivity analysis of water retaining performance of concrete impervious wall with deep overburden

作　　者：邓理想[1] 吴俊杰[1] 王景 Deng Lixiang;Wu Junjie;Wang Jing(Xinjiang Water Conservancy and Hydropower Survey and Design Research Institute Co.,Ltd.,Urumqi 830000,Xinjiang)

机构地区：[1]新疆水利水电勘测设计研究院有限责任公司,新疆乌鲁木齐830000

出　　处：《吉林水利》2022年第5期20-24,38,共6页Jilin Water Resources

基　　金：国家重点研发计划(2017YFC0404904)。

摘　　要：基于大型三维有限元软件ABAQUS建立泄洪冲沙闸、混凝土护坦、连接板、防渗墙、砂砾石覆盖层的三维模型,采用等效渗透系数法对深厚覆盖层混凝土防渗墙挡水性能进行敏感性分析,探讨了泄洪冲沙闸渗透稳定关于防渗墙破损程度与连接板接缝铜止水破坏数量的敏感性程度。结果表明:防渗墙破损程度越大,连接板接缝铜止水破坏数量越多,地基单宽渗漏量越大,下游出逸比降越大。铜止水对工程整体的防渗效果影响较大,其中方案6两道铜止水破坏、方案7破坏都达到极限时,闸室渗漏稳定性将不满足要求。因此,合理控制连接板与闸室之间的变形量及施工质量,对整个工程的安全运行至关重要。Based on the large-scale three-dimensional finite element software ABAQUS,the three-dimensional models of flood discharge sluice,concrete apron,connecting plate,impervious wall and sand-gravel cover are established.The sensitivity analysis of the water retaining performance of concrete impervious wall with deep overburden is carried out by using the equivalent permeability coefficient method,and the sensitivity degree of seepage stability of flood discharge sand sluice with respect to the damage degree of impervious wall and the number of copper water stop damage of joint plate is discussed.The results show that the greater the damage degree of the impervious wall is,the more the copper water stop damage of the joint of the connecting plate is,the greater the leakage per unit width of the foundation is,and the greater the downstream escape ratio is.The copper water stop has a great influence on the anti-seepage effect of the project as a whole,and when the two copper water stops of scheme 6 and scheme 7 reach the limit,the leakage stability of the gate chamber will not meet the requirements.Therefore,the reasonable control of the deformation and construction quality between the connecting plate and the gate chamber is very important to the safe operation of the whole project.

关 键 词：深厚覆盖层 泄洪冲沙闸 三维有限元法 防渗墙挡水性能 敏感性分析 

分 类 号：TV131[水利工程—水力学及河流动力学]