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Seismic rehabilitation and analysis of Chaohe earth dam

Lei Fu (付磊)1 and Xiangwu Zeng (曾向武)2

1. Findling, Inc., Baltimore, MD 21215, USA
2. Dept. of Civil Engineering, Case Western Reserve University, Cleveland, OH 44106, USA

Abstract: Stability of earth dams during earthquakes has been a major concern for geotechnical engineers in seismic active regions. Liquefaction induced slope failure occurred at the upstream slope of a major earth dam in the suburb of Beijing, China, during the 1976 Tangshan Earthquake. The gravelly soil with loose initial condition liquefied under relatively small ground vibration. In recent years, a major seismic rehabilitation project was carried out on a similar earth dam nearby using dumped quarry stone. Seismic stability analysis was carried out using model test, finite element simulation, and pseudo-static slope stability program after taking into account the influence of excess pore pressure.

Keywords: earth dam; rehabilitation; stability analysis; liquefaction; riprap protection