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Shaking table test for reinforcement of soil slope with multiple sliding surfaces by reinforced double-row anti-slide piles

引用

Journal of Mountain Science 2022年第5期19卷 1419-1436页

作者： WU Hong-gang PAI Li-fang Northwest Research Institute Co. Ltd of China Railway Engineering CorporationLanzhou 730000China China Academy of Railway Sciences Beijing 100081China

Despite the continuous advancements of engineering construction in high-intensity areas,many engineering landslides are still manufactured with huge thrust force,and double-row piles are effective to control such large *** this study,large shaking table test were performed to test and obtain multi-attribute seismic data such as feature image,acceleration,and dynamic soil *** the feature image processing analysis,the deformation characteristics for the slope reinforced by double-row piles were *** analyzing the acceleration and the dynamic soil pressure time domain,the spatial dynamic response characteristics were *** Fast Fourier Transform and half-power bandwidth,the damping ratio of acceleration and dynamic soil pressure was *** that,the Seism Signal was used to calculate the spectral displacement of the accelerations to obtain the regional differences of spectral *** results showed that the overall deformation mechanism of the slope originates from tension failure in the soil *** platform at the back of the slope was caused by seismic subsidence,and the peak acceleration ratio was positively correlated with the relative pile *** dynamic soil pressure of the front row piles showed an inverted"K"-shaped distribution,but that of the back row piles showed an"S"-shaped *** predominant frequency of acceleration was 2.16 Hz,and the main frequency band was 0.7-6.87 Hz;for dynamic soil pressure,the two parameters became 1.15 Hz and 0.5-6.59 Hz,*** conclusion,dynamic soil pressure was more sensitive to dampening effects than ***,compared to acceleration,dynamic soil pressure exhibited larger loss factors and lower resonance ***,back row pile heads were highly sensitive to spectral displacement compared to front row pile *** findings may be of reference value for future seismic designs of double-row piles.

关键词： Double row anti-slide piles multislide surface landslide Shaking table test Acceleration dynamic soil pressure dynamic response characteristic

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