Comparative tests on seismic performance of anti-slide piles with prestressed anchor cables with different angles

WANG Yu; ZHENG Tong; SUN Rui; QI Wenhao; LI Linggui; CHENG Yang; ZHANG Yiming

doi:10.11779/CJGE2023S20012

Volume 45 Issue S2

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Chinese Journal of Geotechnical Engineering > 2023 > 45(S2): 110-115. > DOI: 10.11779/CJGE2023S20012

WANG Yu, ZHENG Tong, SUN Rui, QI Wenhao, LI Linggui, CHENG Yang, ZHANG Yiming. Comparative tests on seismic performance of anti-slide piles with prestressed anchor cables with different angles[J]. Chinese Journal of Geotechnical Engineering, 2023, 45(S2): 110-115. DOI: 10.11779/CJGE2023S20012

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Comparative tests on seismic performance of anti-slide piles with prestressed anchor cables with different angles

WANG Yu^{1, 2,},
ZHENG Tong^{1, 2, ,},
SUN Rui^{1, 2},
QI Wenhao^{1, 2},
LI Linggui³,
CHENG Yang^{1, 2},
ZHANG Yiming^{1, 2}

1.
Key Laboratory of Earthquake Engineering and Engineering Vibration, Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150080, China
2.
Key Laboratory of Earthquake Disaster Mitigation, Ministry of Emergency Management, Harbin 150080, China
3.
No.5 Geological and Mineral Survey Institute of Qinghai Province, Xining 810028, China

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Received Date: November 29, 2023
Available Online: April 19, 2024

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Abstract

The prestressed anchor cable is an important component of the anti-slide pile of prestressed anchor cable, but the influences of its arrangement angle on the seismic performance of the anti-slide pile of prestressed anchor cable is not yet clear. To this end, a series of centrifugal model tests considering the horizontal and inclined layout of anchor cables are designed and completed. The seismic deformation and acceleration amplification characteristics of the slope are compared and analyzed under different arrangement angles of anchor cable, as well as the stress characteristics of the pile-anchor structure. It is revealed the influences of arrangement angle of anchor cable change the seismic seismic performance of the anti-slide pile of prestressed anchor cable-slope system. The results show that there is an abnormal amplification phenomenon of acceleration near the anchor point of the anchor cable under different arrangement angles of anchor cable, and the amplification coefficient increases with the increase of input seismic intensity. The settlement amplitude and acceleration amplification of the slope are significantly reduced when the inclined anchor placement is applied. The inclined anchor placement is beneficial for improving the seismic stress on the pile, and the peak dynamic bending moment and dynamic soil pressure of the pile are significantly reduced compared to those under horizontal anchor placement. The inclined anchoring method can effectively slow down the growth of internal forces in anchor cables and reduce the risk of seismic failure in the pile-anchor-slope system.

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