基于伪随机场的面板坝运行期库岸渗漏成因分析
Causes Analysis of Reservoir Bank Leakage During the Operation Period of Panel Dams Based on Pseudorandom Fields
鞠鲁忆 1沈振中 2曹福君 3吴义军 1李皓璇 1刘子茜1
作者信息
- 1. 河海大学水利水电学院,江苏 南京 210098
- 2. 河海大学水利水电学院,江苏 南京 210098;河海大学水文水资源与水利工程科学国家重点实验室,江苏 南京 210098
- 3. 吉林水利电力职业学院,吉林 长春 130117
- 折叠
摘要
四川某混凝土面板堆石坝坝址区地形条件复杂,坝后量水堰处渗水量相比同类工程观测数据偏大,为此,基于饱和—非饱和渗流原理,利用自编程准三维渗流分析程序建立渗流分析模型,在伪随机场探测结果的基础上分别对导流洞封堵区、左岸防渗帷幕、止水及右岸渗漏通道进行敏感性分析.结果表明,导流洞封堵区渗水及左岸趾板下死水位以下的上层防渗帷幕失效是造成左岸渗流量增大的重要原因;左岸面板周边缝止水的不同失效性仅对面板附近渗压造成局部影响,表层止水对测点渗压影响更大;右岸存在渗漏通道时,右岸测点拟合效果更好,右岸山体渗流量增大,但量水堰处流量并未同等程度增加.
Abstract
The terrain conditions of a concrete faced rockfill dam site in Sichuan are complex,and the seepage amount at the water measuring weir behind the dam is larger compared to similar engineering observation data.Based on the satu-ration-unsaturated seepage principle,a self-programmed quasi-three-dimensional seepage analysis program was used to establish a seepage analysis model.Based on the detection results of pseudo random field,the sensitivity analysis of diver-sion tunnel blocking area,left bank anti-seepage curtain,water seal and right bank leakage channel was carried out.The conclusions are as follows:The seepage in the blocking area of the diversion holes and the failure of the upper layer of seepage control curtain below the dead water level under the toe plate of the left bank were important reasons for the in-crease of seepage amount on the left bank;The different failures of the perimeter seam stopping on the left bank face only had a local impact on the seepage pressure near the face,and the surface water stop had a greater impact on the seepage pressure at the measurement point;When there was a seepage channel in the right bank,the fitting effect of the measur-ing points in the right bank was better,and the seepage amount of the right bank mountain increased,but the flow rate at the measuring weir did not increase to the same extent.
关键词
混凝土面板堆石坝/渗流有限元分析/渗漏原因/断层/防渗帷幕Key words
concrete face rockfill dam/finite element analysis of seepage/leakage cause/fault/anti-seepage curtain引用本文复制引用
基金项目
国家自然科学基金-雅砻江联合基金项目(U1765205)
国家自然科学基金项目(52179130)
&&(2019YFC1510802)
国家自然科学基金青年基金项目(51609073)
江苏省自然科学基金项目(BK20201312)
中央高校基本科研业务费专项资金项目(B210203065)
出版年
2024
NETL
NSTL
万方数据