| 水位骤降对下伏隧道堤防安全影响研究 |
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| 引用本文： | 曹磊,易宸,刘娟,王江营,刘思博.水位骤降对下伏隧道堤防安全影响研究[J].水利与建筑工程学报,2020(2):142-146. |
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| 作者姓名： | 曹磊 易宸 刘娟 王江营 刘思博 |
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| 作者单位： | 湖南水利水电职业技术学院;长沙理工大学水利工程学院;湖南建工集团有限公司 |
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| 基金项目： | 湖南省水利科技项目(XSKJ2018179-06);湖南省水利科技项目(XSKJ2018179-03);湖南省教育厅科学研究项目(18C11514)。 |
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| 摘 要： | 建立了考虑水位骤降条件下的下伏隧道堤防模型,依托湘江某下伏隧道堤防工程,基于堤防边坡渗流原理,结合有限元应力计算,探讨了不同水位骤降速率下的浸润线情况,计算了堤防安全系数。研究结果表明:湘江水位骤降速率越快,浸润线变化范围越大,浸润线变化范围与水位降落速率成正比;湘江水位骤降速度在3 m/d^4 m/d,水位降到28.8 m时,堤岸失去稳定;水位骤降并非整个过程中堤岸均处于失稳状态,而是水位降至某高度后堤岸失稳,骤降速率增快对堤防安全系数有一定负面作用。研究结果对隧道下穿堤防建设具有一定指导意义。
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| 关 键 词： | 下伏隧道 堤防 水位骤降 稳定性评价 数值计算 |
Influence of Water Level Sudden Drop on the Safety of the Underground Tunnel Embankment |
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| CAO Lei,YI Chen,LIU Juan,WANG Jiangying,LIU Sibo.Influence of Water Level Sudden Drop on the Safety of the Underground Tunnel Embankment[J].Journal of Water Resources Architectural Engineering,2020(2):142-146. |
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| Authors: | CAO Lei YI Chen LIU Juan WANG Jiangying LIU Sibo |
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| Affiliation: | (Hunan Polytechnic of Water Resources and Electric Power,Changsha,Hunan 410131,China;School of Hydropower Engineering,Changsha University of Science&Technology,Changsha,Hunan 410114,China;Hunan Construction Engineering Group Co.,Ltd.,Changsha,Hunan 410004,China) |
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| Abstract: | Based on the seepage principle of the embankment slope and the finite element stress calculation, the embankment model of the underlying tunnel under the condition of sudden water level drop is established, the situation of the phreatic line under the different water level drop rate is discussed, and the safety factor of the embankment is calculated. The results show are as follows. The faster the water level plummeting rate is, the larger the change range of the phreatic line is, and the change range of the phreatic line is in direct proportion to the water level falling rate;when the water level plummeting rate is 3 m/d^4 m/d, and the water level is 28.8 m, the bank slope will lose stability;during the water level plummeting process, not all the banks lose stability, but after the water level drops to a certain elevation, the bank loses stability and plummeting speed. The water level drop rate has negative effects on the safety factor of embankment. |
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| Keywords: | underground tunnel dike water level drop stability evaluation numerical calculation |
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