摘要
The seismic safety of the reinforcement dam slope is studied through shaking table test and numerical simulation.The dynamic characteristics of dam slopes,failure mechanism,seismic stability,as well as the effect of reinforcement during earthquakes are discussed.An elasto-plastic analysis method (FLAC) is used to simulate the dynamic failure process of the reinforcement dam slope.The change law of permanent displacement of dam slope is studied.The effect of the length and the space of reinforcement on the depth of slip surface and the slope stability are investigated.Good agreement is obtained between the numerical results and those from shaking table tests.The results show that the dynamic failure is a gradual process not at a particular time.With the increase of the reinforcement length or the decreasing reinforcement spacing,the slip surface becomes deeper and thus the slope stability is improved.The reinforcement can obviously enhance the overall stability of slope dam.It can also effectively control the shallow sliding of slope.These researches provide basic data for reinforcement measures design of earth-rockfill dam.
The seismic safety of the reinforcement dam slope is studied through shaking table test and numerical simulation. The dynamic characteristics of dam slopes, failure mechanism, seismic stability, as well as the effect of reinforcement during earthquakes are discussed. An elasto-plastie analysis method （FLAC） is used to simulate the dynamic failure process of the reinforcement dam slope. The change law of permanent displacement of dam slope is studied. The effect of the length and the space of reinforcement on the depth of slip surface and the slope stability are investigated. Good agreement is obtained between the numerical results and those from shaking table tests. The results show that the dynamic failure is a gradual process not at a particular time. With the increase of the reinforcement length or the decreasing reinforcement spacing, the slip surface becomes deeper and thus the slope stability is improved. The reinforcement can obviously enhance the overall stability of slope dam. It can also effectively control the shallow sliding of slope. These researches provide basic data for reinforcement measures design of earth-rockfill dam.
基金
Sponsored by the National Natural Science Fund for Distinguished Young Scholars (Grant No. 50808032 )
the National Key Basic Research Program(Grant No. 2008CB425801)
the National Natural Science Fund for Hydropower Development of Yalongjiang Project (Grant No. 50679093)
the National Mega-project of Natural Science Foundation Program (Grant No. 90815024)
the Innovative Research Team in Universities Program Funded by Ministry of Education,China (Grant No. IRT0518)
