Researching effects of face foundation tilt to stability of concrete gravity dams and solution to control the tilt of dams

Abstract

     In the design of gravity concrete dam on rock foundation, dam's sectional dimension can be determined under the assumption that dam's bottom is horizontal. However, while working, it may experience some unfavorable conditions; especially during an earthquake, in construction area with tectonic fault, dam foundation will be tilted, and this will affect dam's stability. Through calculations for various dam heights, the paper has established the relationship between the stability coefficient of dam with foundation slope and determined the angle (downstream) limit for various dam heights. Technical solution to control the tilt of dam is using pure pendulum or inverse pendulum located inside dam body, and inverse pendulum with anchors in the foundation gives more accurate measurement results.