[1]赵洋,李守义.考虑上游洪水因素下土石坝溃决流量研究[J].自然灾害学报,2019,28(04):062-68.[doi:10.13577/j.jnd.2019.0407]
 ZHAO Yang,LI Shouyi.Research on earth-rock dam breach flow based on upstream flood factors[J].,2019,28(04):062-68.[doi:10.13577/j.jnd.2019.0407]
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考虑上游洪水因素下土石坝溃决流量研究
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《自然灾害学报》[ISSN:/CN:23-1324/X]

卷:
28
期数:
2019年04期
页码:
062-68
栏目:
出版日期:
2019-08-28

文章信息/Info

Title:
Research on earth-rock dam breach flow based on upstream flood factors
作者:
赵洋 李守义
西安理工大学 水利水电学院, 陕西 西安 710048
Author(s):
ZHAO Yang LI Shouyi
School of Water Resources and Hydropower, Xi’an University of Technology, Xi’an 710048, China
关键词:
超标准洪水土石坝参数模型逐渐溃决水量平衡洪峰流量
Keywords:
superstandard floodearth-rockfill damparametric modelgradual breachwater balanceflood peak flow
分类号:
TV131.4;X9;X43
DOI:
10.13577/j.jnd.2019.0407
摘要:
当土石坝坝体上游遭遇超标准洪水时,坝体往往会发生漫顶溃决灾害。为了预测溃口溃决流量,采用逐渐溃决方式和水量平衡原理的方法,对宁夏市旗眼山水库进行模拟。计算结果表明:当溃口扩展到第84 min时,溃口流量达到最大值,为3 284.75 m3/s,对应的坝前水位1 189.76 m,总的下泄流量亦达到最大值,为3 404.75 m3/s;计算得出的土石坝溃口处流量值处于二分之一溃坝和全溃理论计算值之间,较符合土石坝的溃决情况,可以为水库下游防洪预警方案的制定提供参考。适当的增加溢洪道和泄洪洞的泄流能力,可以有效地消减溃坝洪水的峰值流量,并且减少洪峰流量对下游城市的淹没风险。
Abstract:
When the upper reaches of the earth-rock dam body encounters a super-standard flood, the dam body often has a flood-top failure. In order to predict the flow of the collapse, the method of gradual collapse and water balance is used to simulate the Qiyanshan Reservoir in Ningxia. The calculation results show that when the fracture extends to the 84th minute, the fracture flow reaches the maximum value of 3 284.75 m3/s, the corresponding water level before the dam is 1189.76m, and the total discharge flow also reaches the maximum value of 3 404.75 m3/s. The flow value of the earth-rock dam breach is between the one-half of the dam break and the theoretical calculation of the full collapse, which is in line with the collapse of the earth-rock dam, and can provide reference for the formulation of the flood control early warning scheme for the reservoir. Appropriately increasing the discharge capacity of the spillway and spillway tunnel can effectively reduce the peak flow of the dam flood and reduce the risk of flooding the downstream city.

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相似文献/References:

[1]刘春辉,景冰冰,李永强.土石坝群体震害评估方法[J].自然灾害学报,2013,22(02):213.
 LIU Chunhui,JING Bingbing,LI Yongqiang.Group assessment method for earthquake damage of earth-rock dam[J].,2013,22(04):213.

备注/Memo

备注/Memo:
收稿日期:2018-12-26;改回日期:2019-04-02。
基金项目:国家自然科学基金项目(51579208)
作者简介:赵洋(1993-),男,硕士研究生,主要从事洪水演进数值模拟和结构应力仿真分析方面的研究.E-mail:378277714@qq.com
通讯作者:李守义(1955-),男,教授,博士,主要从事水工结构应力仿真分析,结构优化设计方面的研究.E-mail:lishouyi@126.com
更新日期/Last Update: 1900-01-01