深厚覆盖层泄洪冲沙闸防渗墙结构优化比选  

Structural Optimization Comparison of Cut-off Wall for Flood Discharge and Sand Sluice with Deep Overburden

作　　者：邓理想[1] 吴俊杰[1] 王景 DENG Li-xiang;WU Jun-jie;WANG Jing(Xinjiang Institute of Water&Hydropower Engineering Investigation,Design and Research,Urumchi 830000,China)

机构地区：[1]新疆水利水电勘测设计研究院,新疆乌鲁木齐830000

出　　处：《云南水力发电》2022年第4期90-94,共5页Yunnan Water Power

基　　金：国家重点研发计划(2017YFC0404904)。

摘　　要：新疆ZG水电站工程泄洪冲砂闸修建于深厚覆盖层上,闸室渗流控制问题尤为显著,通过大型商用有限元软件ABAQUS建立了混凝土护坦、连接板、防渗墙、泄洪冲沙闸、砂砾石覆盖层的三维模型用于防渗墙结构优化比选分析,结果表明:随着防渗墙不断加深坝基渗漏量与下游逸出点水力比降逐渐减小,但是,如果防渗不完全截断覆盖层下游逸出点水力比降无法满足设计要求,最终确定采用全断面防渗。在确定最优方案后分析了不同工况下渗漏量及坝基渗透稳定性均满足要求。Flood discharge and sand scouring sluice of ZG Hydropower Station in Xinjiang is built on deep overburden,and seepage control of sluice chamber is particularly significant.In this paper,three-dimensional model of concrete apron,connecting plate,cut-off wall,flood discharge and sand sluice,sand and gravel cover is established by ABAQUS for comparison and analysis of optimization of cut-off wall structure.The results show that the hydraulic ratio drop between dam foundation leakage and downstream escape point decreases with the deepening of cut-off wall.However,if the impervious layer is not cut off completely,the hydraulic gradient of the downstream escape point can not meet the design requirements.The whole section seepage control is finally determined.After determining the optimal scheme,this paper analyzed that the seepage quantity and seepage stability of dam foundation under different conditions meet the requirements.

关 键 词：深覆盖层 泄洪冲砂闸 防渗墙结构优化 有限元计算 ABAQUS 

分 类 号：TV314[水利工程—水工结构工程]