Back analysis in the interpretation of concrete dam foundation behavior

2018 ◽  
pp. 191-198
Author(s):  
A.T. Castro ◽  
J.V. Lemos
Keyword(s):  
Back Analysis ◽  
Concrete Dam ◽  
Dam Foundation

Back Analysis of Material Parameters of Concrete Dam Using Genetic Algorithm

2012 ◽  
Vol 562-564 ◽  
pp. 1955-1958
Author(s):  
Jin Bao Liu ◽  
Shou Ju Li ◽  
Wei Zhu
Keyword(s):  
Genetic Algorithm ◽  
Objective Function ◽  
Optimization Problem ◽  
Back Analysis ◽  
Water Level Change ◽  
Concrete Dam ◽  
Material Parameters ◽  
Level Change ◽  
Inversion Procedure ◽  
The Difference

The inverse problem of parameter identification is deal with by minimizing an objective function that contains the difference between observed and calculated dam displacements. The optimization problem of minimizing objective function is solved with genetic algorithm. The calculated dam displacements are simulated by using finite element method according to water level change acting on dam upstream. The practical dam displacements are observed on the dam crest. The investigation shows that the forecasted dam displacements agree well with observed ones. The effectiveness of proposed inversion procedure is validated.

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

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.

scholarly journals Engineering geological behaviour of recent conglomerate deposits in dam foundation. The case of Agiokampos dam in Thessaly, Cen- tral Greece.

2013 ◽  
Vol 47 (4) ◽  
pp. 1759
Author(s):  
V. Marinos ◽  
S. Lazaridou ◽  
V. Perleros ◽  
K. Sotiropoulou
Keyword(s):  
Rock Mass ◽  
Bearing Capacity ◽  
Grout Curtain ◽  
Back Analysis ◽  
Internal Erosion ◽  
Diaphragm Wall ◽  
Strength Parameters ◽  
Dam Foundation ◽  
Surficial Zone ◽  
Cementing Material

A typical example of dam foundation on Neogenic conglomerate deposits is presented in this paper. The case of Agiokampos dam in east Thessaly in central Greece. The level of natural compactness and the nature of the cementing material are crucial elements for the strength, the bearing capacity and the permeability of these formations. These conglomerates of medium consistency, do not allow relying on traditional sampling and tests in the boreholes. Lugeon tests are meaningless and falling head tests are recommended. Back analysis on slopes is certainly a useful tool for approaching the strength parameters of the global rock mass. Thus it is understood that the engineering geological assessment before any testing and analysis is of prime importance.Due to the fine nature of the cement, permeability is generally low and no leakages are expected. However, an impermeable grout curtain must be created due to some higher values. Conglomerates are not easily groutable and a combination of a diaphragm wall is suggested. Finally, a carpet grouting is designed since the surficial zone is susceptible to internal erosion.

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

2013 ◽  
Vol 774-776 ◽  
pp. 48-53 ◽  
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.

Sign in / Sign up

Export Citation Format

Share Document