Control Mechanism and Early Warning of Rainfall-Induced Landslide Based on NPR Anchor Cable

被引：0
|
作者：
Tao Z.-G. [1 ,2 ]
Shi G.-C. [1 ,2 ]
Yang X.-J. [1 ,2 ]
He M.-C. [1 ,2 ]
机构：
[1] State Key Laboratory for Tunnel Engineering, China University of Mining and Technology（Beijing）, Beijing
[2] School of Mechanics and Civil Engineering, China University of Mining and Technology （Beijing）, Beijing
来源：
Dongbei Daxue Xuebao/Journal of Northeastern University | 2024年 / 45卷 / 04期
关键词：
control mechanism; early‑warning; landslide; monitoring; negative Poisson’s ratio（NPR）anchor cable; rainfall;
D O I：
10.12068/j.issn.1005-3026.2024.04.015
中图分类号：
学科分类号：
摘要：
In order to study the control and the early‑warning prediction technology for rainfall‑induced landslide ， the similar model test was designed by analyzing the spatial and temporal characteristics of slope deformation of Xiongjia Mountain landslide. Using ordinary Poisson’s ratio（PR）anchor cable and negative Poisson’s ratio（NPR）anchor cable as reinforcement materials，the law of rainfall‑induced landslide and control mechanism of anchor cable were analyzed by using high‑speed photography，pore pressure，earth pressure and anchor cable force sensors，and the evolution law of the Newtonian force during landslide was explored based on field tests. The results show that the sudden drop in pore water pressure is approximately synchronized with the local collapse of slope. NPR anchor force drop abruptly，causing local deformation in slope. The PR anchor cables fail because they cannot withstand large deformation，while the NPR anchor cables have high‑stress energy absorption control functions due to the constant resistance and large deformation characteristics，enabling the slope to reach a secondary equilibrium state. The NPR anchor cable exhibits a significant deformation‑slip dynamic law characterized by a first sudden increase followed by a sudden drop before the landslide. The field test revealed the Newtonian force evolution law in the whole process of the landslide，and obtained the early‑warning time parameters of the Xiongjia Mountain landslide 7. 5 h in advance. © 2024 Northeast University. All rights reserved.
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页码：573 / 583
页数：10
相关论文
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