减压井在汉江遥堤管涌险情整治中的应用效果

doi:10.11988/ckyyb.20240208

长江科学院院报 ›› 2024, Vol. 41 ›› Issue (11): 82-87.DOI: 10.11988/ckyyb.20240208

减压井在汉江遥堤管涌险情整治中的应用效果

崔皓东(), 裴怡, 李少龙, 范越

长江科学院水利部岩土力学与工程重点实验室,武汉 430010

收稿日期:2024-03-07 修回日期:2024-04-27 出版日期:2024-11-01 发布日期:2024-11-26
作者简介:
崔皓东(1976-),男,河南项城人,正高级工程师,博士,主要从事防洪减灾、水工渗流及地下水方面的研究工作。E-mail:Seep3d@qq.com
基金资助:
国家重点研发计划项目(2023YFC3209500); :中央级公益性科研院所基本科研业务费项目(CKSF2023306/YT)

Application Effect of Relief Wells in the Treatment of Piping Emergency in Yaodi Levee of Hanjiang River

CUI Hao-dong(), PEI Yi, LI Shao-long, FAN Yue

Key Laboratory of Geotechnical Mechanics and Engineering of Ministry of Water Resources, Changjiang River Scientific Research Institute, Wuhan 430010, China

Received:2024-03-07 Revised:2024-04-27 Published:2024-11-01 Online:2024-11-26

摘要/Abstract

摘要：

汉江遥堤属国家Ⅰ级堤防,是汉北平原和武汉市的重要防洪安全屏障,天门李家洲段为历史险段;2021年汉江秋汛该段发生管涌群险情,汛后除险加固采用了新型减压井技术。根据地质和设计资料建立了三维精细有限元渗流模型,开展了减压井效果论证,为减压井设计提供参数依据。模拟表明,洪水工况下减压井具有显著的排水减压效果,堤内满足渗透稳定要求。2023年汉江洪水期该堤段水位超2021年出险时外江水位约1.3 m,堤内再无管涌险情发生,减压井发挥了显著的防洪减灾效益。实际应用表明,针对典型的二元结构堤基管涌险情隐患,减压井是最有效措施之一。研究成果可为类似堤防管涌隐患处理提供借鉴。

关键词: 管涌险情, 堤防减压井, 险情整治, 渗流模拟, 汉江遥堤

Abstract:

Yaodi levee of Hanjiang River is a national first-class embankment, serving as an important flood control barrier safeguarding the Hanbei Plain and Wuhan City. The Lijiazhou levee of Tianmen City is a historical danger section, with a series of piping dangers occurred in this section of the Hanjiang River during the autumn flood season of 2021. A new design of relief well was applied to treat hidden danger of piping in 2022. A three-dimensional seepage model was established and the effect of relief well under different working conditions was analyzed for design. Simulation data shows that the relief well has a significant drainage and pressure reduction effect, and the permeability stability meets the requirements under flood conditions. No piping danger occurred during the 2023 flood period of the Hanjiang River when the flood level was 1.3 m higher than the flood level during 2021 in this embankment section. It indicates that the relief wells played a significant role in flood control and disaster reduction. Practical application shows that relief well is one of the most effective measures for typical pipe surge hazards of binary structure embankment foundation. This study provides references for dealing with similar levee pipe surge hazards.

Key words: pipe surge hazard, relief well, hazard remediation, seepage simulation, Yaodi levee of Hanjiang River

中图分类号:

TV871.3堤防防汛与抢险

崔皓东, 裴怡, 李少龙, 范越. 减压井在汉江遥堤管涌险情整治中的应用效果[J]. 长江科学院院报, 2024, 41(11): 82-87.

CUI Hao-dong, PEI Yi, LI Shao-long, FAN Yue. Application Effect of Relief Wells in the Treatment of Piping Emergency in Yaodi Levee of Hanjiang River[J]. Journal of Yangtze River Scientific Research Institute, 2024, 41(11): 82-87.

图/表 13

图1 汉江遥堤李家洲段管涌群(2021年9月7日)

Fig.1 Piping group in Lijiazhou section of Yaodi levee in Hanjiang River (September 7,2021)

表1 汉江遥堤李家洲段历史险情统计

Table 1 Statistics of historical danger in Lijiazhou of Yaodi levee of Hanjiang River

出险年份	险情类型	出险位置	桩号范围
1951	管涌	堤脚	265+450
1964	管涌群	堤脚/距堤脚150 m	265+150/265+450
1983	管涌	近堤脚	265+150
1984	管涌	近堤脚	不详
2014	管涌	距堤脚150 m	265+200
2016	管涌	距堤脚140 m	265+100
2017	管涌群	距堤脚133~135 m	265+100/265+250
2021	管涌群	距堤脚126~140 m	265+100—265+200

图2 汉江遥堤李家洲险段平面图

Fig.2 Plan of Lijiazhou dangerous section of Yaodi levee of Hanjiang River

图3 李家洲典型管涌险情点(2021-09-07)

Fig.3 Typical piping hazard in the Lijiazhou section of Hanjiang River (September 7,2021)

图4 李家洲堤段典型横断面示意图(桩号265+150)

Fig.4 Typical section of Lijiazhou levee (section 265 + 150)

图5 原减压井现状(2021年9月)

Fig.5 Current situation of the relief well in Lijiazhou (September,2021)

图6 三维渗流有限元模型

Fig.6 Three-dimensional finite element model of seepage

表2 渗透系数建议值

Table 2 Recommended values of permeability coefficient

序号	地层名称	渗透系数计算取值/ (cm·s^-1)	允许比降
序号	地层名称	渗透系数计算取值/ (cm·s^-1)	垂直	水平
K1	堤身填土	5.0×10^-5
K2	盖重/压浸平台	1.0×10^-4
K3	外平台	1.0×10^-4
K4	堤基砂壤土	1.0×10^-4	0.2	0.1
K5	淤泥质粉质壤土	5.2×10^-5	0.3	0.2
K6	粉质壤土	1.2×10^-5
K7	粉细砂	1.1×10^-3
K8	卵砾石	2.5×10^-2
K9	截渗沟反滤层(失效)	1.0×10^-5

表3 渗流计算分析方案

Table 3 Seepage calculation and analysis schemes

方案	方案说明
F1	原渗控方案失效,2021年险情时水位
F2	盖重延伸至截渗沟,设计洪水位,其他同F1
F3	2022年新建8口新型减压井,其他同F2
F4	2023年洪水位,其他同F3

图7 方案F1、F2和F3堤防剖面等势线

Fig.7 Contour lines of profile section along the embank-ment in schenes F1,F2 and F3

表4 渗流模拟结果

Table 4 Seepage simulation result

方案	盖重末端比降	截渗沟底比降	单井流量/(m³·h^-1)
F1	0.38	0.45	—
F2	0.60	0.79	—
F3	0.03	0.08	12.88
F4	0.00	0.06	10.4

图8 方案F4顺堤向过减压井剖面等势线

Fig.8 Contour of profile section in scheme F4

图9 方案F4过减压井剖面等势线

Fig.9 Water head contours of F4

[1]	田密, 盛小涛. 减压井超声波解堵试验初步研究[J]. 长江科学院院报, 2021, 38(6): 102-107.
[2]	吴庆华, 张伟, 邬爱清, 周华敏, 崔皓东. 堤防管涌险情研究进展[J]. 长江科学院院报, 2019, 36(10): 39-44.

减压井在汉江遥堤管涌险情整治中的应用效果

Application Effect of Relief Wells in the Treatment of Piping Emergency in Yaodi Levee of Hanjiang River

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