Study on the Influence of Seepage Behavior of Dam Foundation during Wenchuan Earthquake

2011 ◽  
Vol 255-260 ◽  
pp. 3642-3645
Author(s):  
Kai Hua Zeng ◽  
Hai Yan Ju ◽  
Han Xing Peng
Keyword(s):  
Stress State ◽  
Wenchuan Earthquake ◽  
Groundwater Level ◽  
Tectonic Stress ◽  
Seepage Water ◽  
Dam Foundation ◽  
Strong Earthquakes ◽  
Main Effect ◽  
Small Decline ◽  
Shrinkage Property

Earthquake occurred on May 12, 2008 in Wenchuan, Sichuan Province, China, with magnitude of 8.0 and epicenter intensity of VI. Chencun hydropower station in southern Anhui Province has been shocked strongly during Wenchuan Earthquake, which stations 1,500 km away from Wenchuan. Tectonic stress caused by strong earthquakes inevitably led to the changes of stress state, groundwater level and pore pressure in the dam foundation. Seepage water level observation of the dam foundation had been encrypted immediately. According to the experimental data, it was conformed that significant effects were displayed on the dam foundation seepage because of Wenchuan earthquake, shunhe fault near dam sites was the main effect zone of earthquake tectonic stress, the downrange of groundwater depth was self-evident. As the existence of acrylamide curtain, swelling-shrinkage property of the acrylamide gel restricted the change of groundwater level and rock stress state in the dam foundation caused by seismic tectonic stress; the groundwater level behind the acrylamide curtain had a small decline, and recovering quickly.

Elastic-Plastic Finite Element Analysis on the Spillway of a Concrete Gravity Dam

2013 ◽  
Vol 295-298 ◽  
pp. 1870-1875
Author(s):  
Liang Cao ◽  
Hui Min Wang ◽  
Ji Yao ◽  
Shan Guang Qian ◽  
Chun Feng Tang
Keyword(s):  
Finite Element ◽  
Stress State ◽  
Limit State ◽  
Concrete Gravity Dam ◽  
Element Analysis ◽  
Full Account ◽  
Dam Foundation ◽  
Elastic Plastic ◽  
Geological Conditions ◽  
Sliding Stability

The 3-D finite element model of a concrete gravity dam’s spillway was established in this paper, and the elastic-plastic theory was applied, then the deformation and stress state of the dam under various working conditions were analyzed, it was prooved that the deformation and stress state of the dam were in normal condition. After solving the force of the dam foundation surface and taking full account of the complex geological conditions, the dam’s sliding stability was analyzed by capacity limit state design formula. The calculation results showed that, the stability parameter of the dam along foundation surface was bigger than 1.0, the dam’s sliding stability met the requirement.

Groundwater Level Changes in Taiwan Caused by The Wenchuan Earthquake on 12 May 2008

2012 ◽  
Vol 169 (11) ◽  
pp. 1947-1962 ◽  
Author(s):  
Tsai-Ping Lee ◽  
Yeeping Chia ◽  
Hsin-Ying Yang ◽  
Ching-Yi Liu ◽  
Yung-Chia Chiu
Keyword(s):  
Wenchuan Earthquake ◽  
Groundwater Level ◽  
The Wenchuan Earthquake ◽  
Groundwater Level Changes

Study on Stress of Closed Cut-Off Wall in Earth-Rock Dam Reinforcement under Different Engineering Conditions

2012 ◽  
Vol 594-597 ◽  
pp. 1969-1974 ◽  
Author(s):  
Jiang Lin Gao ◽  
Yun Xiang Chen
Keyword(s):  
Elastic Modulus ◽  
Stress State ◽  
Permeability Coefficient ◽  
Deformation Modulus ◽  
Dam Foundation ◽  
Filling Materials ◽  
The Earth ◽  
Coupled Numerical Model ◽  
Common Foundation ◽  
Wall Deformation

Closed concrete cut-off wall has been widely used in the reinforcement projects of earth-rock dam. However, the research on the cut-off wall was rare. In order to discuss the stress state of the wall under different engineering conditions, a coupled numerical model was established by considering coupled interaction, including contact between wall and dam, and coupling of stress and seepage. Taking the earth-rock dam which built on common foundation for example, the stress distribution of the wall and influencing law of different factors were mainly researched, including elastic modulus of the wall, deformation modulus of the dam filling materials, permeability coefficient of the dam foundation, etc. The conclusions had reference significance for the application and design and calculation method of concrete cut-off wall in the reinforcement projects of earth-rock dam.

Sign in / Sign up

Export Citation Format

Share Document