| 绕坝渗流地下水位的时空分布模型研究 |
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| 引用本文： | 郑东健,王建.绕坝渗流地下水位的时空分布模型研究[J].水科学进展,2005,16(5):730-734. |
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| 作者姓名： | 郑东健 王建 |
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| 作者单位： | 河海大学水利水电工程学院, 江苏, 南京, 210098 |
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| 基金项目： | 国家自然科学基金重点资助项目(50139030)，国家重点基础研究发展计划(973)资助项目(2002CB412707)~~ |
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| 摘 要： | 许多大坝的失事是由于高地下水位引起坝肩失稳所致。绕坝渗流是影响坝肩高地下水位的主要因素。为此通常将大坝基础防渗帷幕延伸到坝肩岸坡内一定距离,以减小绕坝渗流影响。而防渗帷幕运行性态随时间变化,为了评价坝肩防渗帷幕和地下水位的运行性态,首先分析了地下水位观测资料和水位、降水、温度、时效等时空影响因素及其表达式,随后基于岸坡地下水位观测资料,利用最小二乘法建立了大坝岸坡地下水位的时空分布模型。通过比较模型剩余标准差和测点的剩余标准差,可以确定坝肩地下水位的异常测点,分析岸坡防渗薄弱部位,掌握坝肩岸坡渗流场时空分布规律,监控绕坝渗流的性态。
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| 关 键 词： | 绕坝渗流 时空分布 模型 地下水位 |
| 文章编号： | 1001-6791（2005）05-0730-05 |
| 收稿时间： | 2004-06-01 |
| 修稿时间： | 2004-08-30 |
Spatial-temporal distribution model for the groundwater elevation of dam abutment |
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| ZHENG Dong-jian,WANG Jian.Spatial-temporal distribution model for the groundwater elevation of dam abutment[J].Advances in Water Science,2005,16(5):730-734. |
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| Authors: | ZHENG Dong-jian WANG Jian |
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| Affiliation: | Hohai University, Nanjing 210098, China |
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| Abstract: | Many dams accidents result from its abutment stabilizing failure caused by the high groundwater level.The seepage of the bypass dam is one of the factors to bring about the rise of the abutment groundwater level.As to the decrease the groundwater level of the dam abutment,the seepage proofing curtain of the dam base extends deep into the banks of a reservoir.At the same time,the behavior of the seepage proofing curtain changes with the time.To evaluate the behavior of the seepage proofing curtain and groundwater level of the dam abutment,we analyze the observation data of water table of dam abutment and the influential factor of the groundwater,such as water level of a reservoir,rainfall,temperature,ageing effect and the coordinates of point location.And the expressions of the effect factors of abutment groundwater were developed.Then,based on the observation,the spatial-temporal distribution model for the groundwater elevation of the dam abutment is established by the least square method.The abnormal points that have high groundwater elevation are located by comparing the standard deviation of the fitting model with the points.And the seepage behavior of whole dam abutment is discussed and the weak seepage part of the abutment is located and monitored. |
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| Keywords: | seepage bypass dam spatialtemporal distribution model groundwater level |
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