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Bulletin of Engineering Geology and the Environment

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01-04-2024 | Original Paper

Experimental study on the control characteristics of the negative Poisson’s ratio structural anchor cable on the large deformation of rainfall-induced landslide

Authors: Guangcheng Shi, Xiaojie Yang, Jihao Sun, Zhigang Tao, Luis Ribeiro e Sousa

Published in: Bulletin of Engineering Geology and the Environment | Issue 4/2024

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Abstract

The control and early warning of landslide induced by rainfall have always been the emphasis and difficulty of geological disaster prevention and mitigation. In this study, a slope similarity model was developed based on the landslide at Xiongjia Mountain quarry in Yingjiang County, Yunnan Province, China. A new type of the negative Poisson’s ratio structural (NPR) anchor cable and the ordinary prestressed anchor cable (abbreviation PR anchor cable) at model scale were used as slope reinforcement materials. A physical model experiment was carried out to examine the reinforcement mechanism and control effect of rainfall-induced landslides by monitoring and analyzing the evolution characteristics of volumetric water content, pore water pressure, vertical earth pressure, and anchor cable force. The results show that the abnormality of the monitoring curve of soil hydraulic parameters corresponds well with the shallow local slump of the slope. The NPR anchor cable is more sensitive to the redistribution of the internal stress field of the slope induced by rainfall, confirming the law of sudden drop in the force of the NPR anchor cable and local deformation in the slope. In addition, the NPR anchor cable produces a high-stress energy-absorbing control function by virtue of the constant resistance and large deformation characteristics, which effectively suppresses the large deformation of the slope and promotes the slope to reach a secondary equilibrium state. Furthermore, the NPR anchor cable force shows a significant deformation-immediate sliding dynamic law with an “initial spike followed by sudden drop” before the landslide.

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Title: Experimental study on the control characteristics of the negative Poisson’s ratio structural anchor cable on the large deformation of rainfall-induced landslide
Authors: Guangcheng Shi
Xiaojie Yang
Jihao Sun
Zhigang Tao
Luis Ribeiro e Sousa
Publication date: 01-04-2024
Publisher: Springer Berlin Heidelberg
Published in: Bulletin of Engineering Geology and the Environment / Issue 4/2024
Print ISSN: 1435-9529
Electronic ISSN: 1435-9537
DOI: https://doi.org/10.1007/s10064-024-03641-w

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