| 改扩建水库土坝段三维渗流问题仿真研究 |
| |
| 作者姓名： | 韩凤霞 崔 栋 |
| |
| 作者单位： | ( 1. 北京市水利规划设计研究院, 北京100048; 2. 华北水利水电大学, 郑州450045) |
| |
| 摘 要： | 渗流问题是直接影响大坝改扩建后运行安全的关键问题,为此,利用三维渗流场的仿真研究,合理评价大坝改扩建设计渗控的合理性和有效性是十分必要的。采用无压渗流场仿真计算理论和有限元方法,在设计渗控措施下,对某水库加高加固后土坝的三维渗流问题进行仿真计算,并定性、定量分析了土坝坝区浸润线、水头分布、渗透坡降及渗漏量等渗流参数的数值规律。结果表明,混凝土预制块、复合土工膜、防渗帷幕等组成的坝体防渗体系,可以有效地截断通过土坝的渗流,但水库水位的抬高也增加了土坝连接部位的绕渗、渗透坡降等不利渗流的安全问题。
|
| 关 键 词： | 土石坝 渗流 改扩建 水头 渗透坡降 渗漏量 |
Simulation of three2dimensional seepage problem of earth dam in reservoir extension project |
| |
| Authors: | H AN Feng-xi CU I Dong |
| |
| Affiliation: | ( 1. Beij ing I ns titute of Water , Beij ing 100048, China;
2. N orth China Univer sity of Water R esour ces and Electr ic P ower , Zhengz hou 450045, China) |
| |
| Abstract: | Seepage is the key technical pro blem fo r the eart h dam extension pr oject, and the reasonable ev aluatio n of the r ationali2
ty and validity of seepag e co nt ro l desig n scheme is needed. In this paper, the unconfined seepag e field theo ry and finite element
met ho d w ere used t o simulate the thr ee2dimensional seepag e of the ear th dam in a reservo ir after reinfor cement and heightening
under t he desig n scheme of seepage co nt ro l. T he char acteristics of the seepag e parameter s, such as infilt ratio n, head distr ibution,
seepage g radient, and leakage, w ere analyzed qualitativ ely and quant itativ ely . T he results showed that seepag e thro ug h the dam
can be effectiv ely inter cepted under the seepag e co nt rol measures of precast co ncr ete blocks, composite geomembr ane, and seep2
ag e pr evention curtain; how ever, t he unfav orable seepag e safety pr oblems o f by pass seepage and seepag e g radient in the dam
junction occur when the r eser vo ir w ater level increases. |
| |
| Keywords: | ear th dam seepage extension water head seepag e g radient leakag e |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《》浏览原始摘要信息 |
|
点击此处可从《》下载全文 |
|
