Seismic damage mechanism of slopes reinforced by anchor sheet-pile wall
The anchor sheet-pile wall is known for its excellent anti-seismic properties.Previous research has focused on the slope displacement,anchor stress,and deformation of anti-slide piles,often neglecting the monitoring of seismic waves within the slope.This gap makes it diffi-cult to clearly characterize the damage characteristics inside the slope in the time-frequency do-main.To address this,a large-scale shaking table test with a geometric similarity ratio of 1:10 was designed and conducted.Using the Hilbert-Huang Transform(HHT)method,this paper analyzes the seismic damage diagnosis and mechanism of slopes reinforced by an anchor pile-sheet wall.The results reveal that the slope failure starts from the sliding surface.As the peak ground acceleration increases,surface failure of the slope occurs earlier than internal failure and gradually develops to lower elevations.The anchor sheet-pile wall effectively transmits seismic forces through the anchor cable and dissipates these forces via the anti-slide pile.The slope failure near the side of the anchor cable anti-slide pile lags behind that farther from the anti-slide pile,and the soil integrity near the side of the anchor sheet-pile wall is obviously better.The characteristic fre-quency and amplitude of the marginal spectrum using the HHT method can clearly characterize the slope damage process.A dynamic response discontinuity exists between the bedrock and the slope,marking the design sliding surface's position.This study provides a theoretical basis for further understanding the propagation mechanism of seismic waves in the slope and studying the failure process of the slope.
万方数据
维普
