Dynamic response of a slope reinforced by double-row antisliding piles and pre-stressed anchor cables  

作　　者：FAN Gang ZHANG Jian-jing QI Shun-chao WU Jin-biao 

机构地区：[1]College of Water Resource and Hydropower, Sichuan University [2]School of Civil Engineering, Southwest Jiaotong University

出　　处：《Journal of Mountain Science》2019年第1期226-241,共16页山地科学学报（英文）

基　　金：financially supported by the National Key R&D Program of China(No.2018YFC1508601);the Fundamental Research Funds for the Central University(20822041B4038)

摘　　要：Large-scale shaking table tests were conducted to study the dynamic response of a slope reinforced by double-row anti-sliding piles and prestressed anchor cables. The test results show that the reinforcement suppressed the acceleration amplification effectively. The axial force time histories are decomposed into a baseline part and a vibration part in this study. The baseline part of axial force well revealed the seismic slope stability, the peak vibration values of axial force of the anchor cables changed significantly in different area of the slope under seismic excitations. The peak lateral earth pressure acting on the back of the anti-sliding pile located at the slope toe was much larger than that acting on the back of the anti-sliding pile located at the slope waist. The test results indicate an obvious load sharing ratio difference between these two anti-slide piles, the load sharing ratio between the two anti-sliding piles located at the slope toe and the slope waist varied mainly in a range of 2-5. The anti-slide pile at the slope waist suppressed the horizontal displacement of the slope surface.Large-scale shaking table tests were conducted to study the dynamic response of a slope reinforced by double-row anti-sliding piles and prestressed anchor cables. The test results show that the reinforcement suppressed the acceleration amplification effectively. The axial force time histories are decomposed into a baseline part and a vibration part in this study. The baseline part of axial force well revealed the seismic slope stability, the peak vibration values of axial force of the anchor cables changed significantly in different area of the slope under seismic excitations. The peak lateral earth pressure acting on the back of the anti-sliding pile located at the slope toe was much larger than that acting on the back of the anti-sliding pile located at the slope waist. The test results indicate an obvious load sharing ratio difference between these two anti-slide piles, the load sharing ratio between the two anti-sliding piles located at the slope toe and the slope waist varied mainly in a range of 2-5. The anti-slide pile at the slope waist suppressed the horizontal displacement of the slope surface.

关 键 词：SLOPE stability ANTI-SLIDING PILE ANCHOR cable Seismic design SHAKING table test Earthquake 

分 类 号：P9[天文地球—自然地理学]