Solution of seepage field in different soil layers of concrete dam foundation by flow net method

The theme of this paper concentrates on hydro- projects’ seepage field in rocks, including the properties of the seepage which flow through both hole qualitative like rocks and fractured rocks. Present the finite element analyzing program which can solve the problem of three dimensional seepage field in hole qualitative rock medium. Apply the program some hydro-project, computed the seepage field in the dam foundation and dam abutments. Besides, further research is done on the decision of the model range limit. And the influence of the pariah shape.

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Three-Dimensional Seepage Analysis and Seepage Control System Optimization of a Hydropower Project

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.468-471.2433 ◽

2012 ◽

Vol 468-471 ◽

pp. 2433-2436

Author(s):

Wen Ting Zhan ◽

Qing Xu

Keyword(s):

Control System ◽

Three Dimensional ◽

System Optimization ◽

Field Analysis ◽

Hydropower Project ◽

Seepage Field ◽

Seepage Analysis ◽

Dam Foundation ◽

Seepage Control ◽

Water Head

The study is conducted for the 3-D seepage field analysis and the seepage control measurements optimization of a hydropower project, which is located in Sichuan Province, China. The seepage control measurements are introduced in this paper. An equivalent method is adopted to simulate drainage holes and the approach of determining equivalent permeability coefficient is presented. The 3-D seepage field with seepage control system is analyzed comprehensively by the water head contours, uplift on the dam foundation, and so on. The necessities of setting the grouting curtain and the drainage holes are discussed respectively. Further the optimal design of the grouting curting and drainage holes of the dam foundation is studied. The results show that special attention should be paid to ensure the well-operation of the seepage control system and the optimization of decreasing the depth of the drainage curtains and grouting curtains properly can be considered.

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Ambient temperature effect in concrete dam foundation seepage

International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts ◽

10.1016/0148-9062(92)90889-8 ◽

1992 ◽

Vol 29 (4) ◽

pp. 253

Keyword(s):

Ambient Temperature ◽

Temperature Effect ◽

Concrete Dam ◽

Dam Foundation

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Seepage Field Study of Xiaowan Hydropower Project

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.243-249.4501 ◽

2011 ◽

Vol 243-249 ◽

pp. 4501-4505

Author(s):

Yong Xiang Wang ◽

Qing Xu ◽

Ji He ◽

Sheng Hong Chen

Keyword(s):

Control System ◽

Three Dimensional ◽

Arch Dam ◽

Hydropower Project ◽

The Finite Element Method ◽

Seepage Field ◽

Dam Foundation ◽

Initial Flow ◽

Seepage Control ◽

Geological Conditions

The Xiaowan Hydropower Project is located in the middle and lower reaches of the Lancang River in Yunnan Province, China. The arch dam of this project, with a height of 294.5m, is by far the highest dam of its type that has been completed in the world. The great water potential makes it necessary to assess the seepage behavior in the dam-foundation system. Due to the complexity of geological conditions and seepage control system, the research is full of challenges. In this paper, the ﬁnite element method (FEM) is adopted to simulate the three-dimensional seepage field. The initial flow method and the boundary pre-adjustment method are combined to obtain the seepage free surface and overflow surface under complicated boundary conditions. The hydraulic potential contours, seepage gradient, drainage discharges, and so on, are all analysed and the results show that the seepage control system is reasonable and effective. Furthermore, the results of the seepage field can provide suitable seepage load in the stress-strain and stability analysis for the dam-foundation system of Xianwan. At present, the project is in good operation.

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Intelligent Anomaly Identification of Uplift Pressure Monitoring Data and Structural Diagnosis of Concrete Dam

Applied Sciences ◽

10.3390/app12020612 ◽

2022 ◽

Vol 12 (2) ◽

pp. 612

Author(s):

Chunhui Ma ◽

Tianhao Zhao ◽

Gaochao Li ◽

Anan Zhang ◽

Lin Cheng

Keyword(s):

Finite Element ◽

Spatial Clustering ◽

Arch Dam ◽

Monitoring Data ◽

Western China ◽

Pressure Monitoring ◽

Concrete Dam ◽

Dam Foundation ◽

Uplift Pressure ◽

Structural Diagnosis

As an essential load of the concrete dam, the abnormal change of uplift pressure directly threatens the safety and stability of the concrete dam. Therefore, it is of great significance to accurately and efficiently excavate the hidden information of the uplift pressure monitoring data to clarify the safety state of the concrete dam. Therefore, in this paper, density-based spatial clustering of applications with noise (DBSCAN) method is used to intelligently identify the abnormal occurrence point and abnormal stable stage in the monitoring data. Then, an application method of measured uplift pressure is put forward to accurately reflect the spatial distribution and abnormal position of uplift pressure in the dam foundation. It is easy to calculate and connect with the finite element method through self-written software. Finally, the measured uplift pressure is applied to the finite element model of the concrete dam. By comparing the structural behavior of the concrete dam under the design and measured uplift pressure, the influence of abnormal uplift pressure on the safety state of the concrete dam is clarified, which can guide the project operation. Taking a 98.5 m concrete arch dam in western China as an example, the above analysis ideas and calculation methods have been verified. The abnormal identification method and uplift pressure applying method can provide ideas and tools for the structural diagnosis of a concrete dam.

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Calculation and Control of Seepage of Hardfill Dam with Different Foundation

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.255-260.3666 ◽

2011 ◽

Vol 255-260 ◽

pp. 3666-3670

Author(s):

Yun Feng Peng

Keyword(s):

Drainage System ◽

Dam Construction ◽

Seepage Discharge ◽

Seepage Field ◽

Dam Foundation ◽

Uplift Pressure ◽

Calculation Results ◽

And Control ◽

Dam Foundations ◽

Geologic Condition

As a new dam type, Hardfill dam has been arisen recently. The suitable geologic condition of t Hardfill dam construction was analyzed based on considering its characteristics in this paper; it was also studied how to choose the reasonable impervious and drainage system to control the dam body and foundation’s seepage on a given geologic condition to make sure the safety of the project. On the basis of analyzing the foundation geologic conditions of many common dam types, two kinds of typical Hardfill dam foundation were put forward. The seepage field law of dam foundation was analyzed by dam foundation seepage discharge, uplift pressure and seepage gradient of some typical positions after setting reasonable impervious and drainage measures on the two kinds of dam foundations. It is indicated by the calculation results that the adaptability of Hardfill dam foundation is comparatively nice, and the safety of dam foundation can be ensured if appropriate impervious and drainage measures are adopted.

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Some considerations about the role of structural geology in concrete dam foundation studies: example of mudhiq dam (Saudi Arabia) (In French)

International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts ◽

10.1016/0148-9062(83)91246-9 ◽

1983 ◽

Vol 20 (4) ◽

pp. 128

Keyword(s):

Saudi Arabia ◽

Structural Geology ◽

Concrete Dam ◽

Dam Foundation

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A Three-Dimensional Analysis Method for the Stability against Deep Sliding of Concrete Dam on Rock Foundation with Mud Layers

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.774-776.48 ◽

2013 ◽

Vol 774-776 ◽

pp. 48-53 ◽

Cited By ~ 1

Author(s):

Yun Liu ◽

Yong Xin Wu

Keyword(s):

Dimensional Analysis ◽

Limit Equilibrium ◽

Three Dimensional ◽

Rock Foundation ◽

Analysis Method ◽

Concrete Dam ◽

Dam Foundation ◽

Stability Against Sliding ◽

The Stability ◽

Dimensional Analysis Method

With the limit equilibrium method for the rigid body, this paper deduces a three-dimensional analysis method for the stability against sliding of concrete dam on rock foundations with mud layers on the basis of the stability against sliding of wedge. The engineering practices show that it is economical and reasonable to apply the method given here to the analysis for the stability of concrete dam foundation with mud layers in the case that the dam axis being not parallel to the strike of mud layers.

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