某水电站近坝变形体失稳对坝体安全性的预测研究

doi:10.16265/j.cnki.issn1003-3033.2022.S2.0033

中国安全科学学报 ›› 2022, Vol. 32 ›› Issue (S2): 200-205.doi: 10.16265/j.cnki.issn1003-3033.2022.S2.0033

某水电站近坝变形体失稳对坝体安全性的预测研究

王勇飞¹(), 李晓飞¹, 李昂¹, 谢凤祥²

¹ 国能大渡河检修安装有限公司, 四川乐山 614900
² 国能大渡河大数据服务有限公司, 四川成都 610041

收稿日期:2022-08-15 修回日期:2022-10-20 出版日期:2022-12-30 发布日期:2023-06-30
作者简介:
王勇飞 (1983—),男,河南开封人,博士,高级工程师,主要从事水电站建设运行与检修管理、水工结构、安全风险智能管控技术等工作。E-mail:249387031@qq.com。
基金资助:
四川省科技计划项目(2022YFG0120)

Study on prediction of dam safety by instability of deformation body near dam of a hydropower station

WANG Yongfei¹(), LI Xiaofei¹, LI Ang¹, XIE Fengxiang²

¹ CHN Energy Dadu River Repair&Installation Co., Ltd., Leshan Sichuan 614900, China
² CHN Energy Dadu River Big Data Services Co., Ltd., Chengdu Sichuan 610041, China

Received:2022-08-15 Revised:2022-10-20 Online:2022-12-30 Published:2023-06-30

摘要/Abstract

摘要：

针对大渡河某水电站上游近坝变形体可能产生整体失稳安全风险,采用潘家铮等国内外公认经典算法,快速定量判别出现堰塞坝的可能性,得出滑体入库最大滑速,涌浪传递至坝址处最大涌浪高度,从而预测分析涌浪灾害对坝体安全性产生的影响。结果表明:该变形体在强地震耦合暴雨等极端工况下发生整体失稳诱发的堰塞坝、涌浪等灾害,不会危及大渡河某水电站大坝安全。同时,当变形体部分位于计算水位以下时,推荐使用潘家铮滑速法计算滑体滑速;当现场急需确认变形体产生涌浪是否影响坝体安全或获取相关参数困难时,可优先使用水科院法进行涌浪高度计算。

关键词: 近坝变形体, 堰塞坝, 涌浪, 坝体, 安全性预测

Abstract:

Aiming at the risk of overall instability caused by the deformation of the near dam at upstream of a hydropower station in Dadu River, Panjiazheng and other well-recognized classical algorithms at domestic and abroad were used to quickly and quantitatively determine the possibility of plug dams. The maximum sliding speed into the reservoir was obtained, and the maximum surge height at the dam site was calculated. Furthermore, the impact of surge disasters on the safety of the dam body was predict and analyzed. The results show that the safety of the hydropower station dam in Dadu river is not endangered by the deformed body caused by the disasters such as the plug dam and surge under extreme working conditions, e.g., the strong earthquake coupled with rainstorm. What's more, it is recommended that when the deformed body part is below the calculated water level, Panjiazheng sliding speed method is suggested to calculate the sliding speed of the sliding body. When it is urgent to confirm whether the wave generated by the deformed body affects the safety of the dam or when it is difficult to obtain the relevant parameters, the method proposed by China Institute of Water Resources and Hydropower Research can be preferentially used for the surge height calculation.

Key words: near dam deformation body, weir plug dam, swell, dam, safety forecast

王勇飞, 李晓飞, 李昂, 谢凤祥. 某水电站近坝变形体失稳对坝体安全性的预测研究[J]. 中国安全科学学报, 2022, 32(S2): 200-205.

WANG Yongfei, LI Xiaofei, LI Ang, XIE Fengxiang. Study on prediction of dam safety by instability of deformation body near dam of a hydropower station[J]. China Safety Science Journal, 2022, 32(S2): 200-205.

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A_r/m	B_r/m	ϕ_s/(°)	E_min/ (10⁴·m³)	备注
100	300	21	1 705	水面介于300~358 m之间,蓄水深度为100 m
100	320	21	1 819
100	358	21	2 035

Δt/s	t_i/s	a_xi /(m·s^-2)	v_xi /(m·s^-1)
4.36	4.36	2.36	10.28
9.24	13.6	2.42	12.88
11.38	24.98	0.33	6.31

S/m	B/m	h/m	η₀/m	Δt/s	T/s	η/m
200	358	100	18.1	10.02	35.7	10.3
500	358	100	18.1	10.02	35.7	6.56
1 000	358	100	18.1	10.02	35.7	2.24
14 500	358	100	18.1	10.02	35.7	0.12

与变形体距离/ m	K	V/ (m·s^-1)	E_m/ (10⁴ m³)	η_max/ m
200	0.262 6	12.88	400	9.59
500	0.152 3	12.88	400	5.56
1 000	0.100 87	12.88	400	3.58
14 500	0.020 57	12.88	400	0.75

某水电站近坝变形体失稳对坝体安全性的预测研究

Study on prediction of dam safety by instability of deformation body near dam of a hydropower station

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