Modern reactivations of a thick colluvial landslide reconstructed from dendrochronology: the example of the Xiakou landslide, China

2021 ◽  
Author(s):  
Shibiao Bai ◽  
Ping Lu
Keyword(s):  
Colluvial Landslide

scholarly journals Characterizing the Development Pattern of a Colluvial Landslide Based on Long-Term Monitoring in the Three Gorges Reservoir

2021 ◽  
Vol 13 (2) ◽  
pp. 224
Author(s):  
Xin Liang ◽  
Lei Gui ◽  
Wei Wang ◽  
Juan Du ◽  
Fei Ma ◽  
...  
Keyword(s):  
Time Variable ◽  
Development Pattern ◽  
Three Gorges ◽  
Reservoir Water ◽  
Reservoir Water Level ◽  
The Three Gorges ◽  
Long Term Monitoring ◽  
Term Monitoring ◽  
Colluvial Landslide

Since the impoundment of the Three Gorges Reservoir (TGR) in June 2003, the fluctuation of the reservoir water level coupled with rainfall has resulted in more than 2500 landslides in this region. Among these instability problems, most colluvial landslides exhibit slow-moving patterns and pose a significant threat to local people and channel navigation. Advanced monitoring techniques are therefore implemented to investigate landslide deformation and provide insights for the subsequent countermeasures. In this study, the development pattern of a large colluvial landslide, locally named the Ganjingzi landslide, is analyzed on the basis of long-term monitoring. To understand the kinematic characteristics of the landslide, an integrated analysis based on real-time and multi-source monitoring, including the global navigation satellite system (GNSS), crackmeters, inclinometers, and piezometers, was conducted. The results indicate that the Ganjingzi landslide exhibits a time-variable response to the reservoir water fluctuation and rainfall. According to the supplement of community-based monitoring, the evolution of the landslide consists of three stages, namely the stable stage before reservoir impoundment, the initial movement stage of retrogressive failure, and the shallow movement stage with stepwise acceleration. The latter two stages are sensitive to the drawdown of reservoir water level and rainfall infiltration, respectively. All of the monitoring approaches used in this study are significant for understanding the time-variable pattern of colluvial landslides and are essential for landslide mechanism analysis and early warning for risk mitigation.

Effect of rainfall on a colluvial landslide in a debris flow valley

2017 ◽  
Vol 14 (6) ◽  
pp. 1113-1123 ◽  
Author(s):  
Liang Qiao ◽  
Xing-min Meng ◽  
Guan Chen ◽  
Yi Zhang ◽  
Peng Guo ◽  
...  
Keyword(s):  
Debris Flow ◽  
Colluvial Landslide

Innovative consideration of a directional appraisal parameter as destabilized criterion of the colluvial landslide

2019 ◽  
Vol 78 (24) ◽  
Author(s):  
He Keqiang ◽  
Liu Honghua ◽  
Guo Lu ◽  
Yuan Xilong ◽  
Zhang Peng ◽  
...  
Keyword(s):  
Colluvial Landslide

scholarly journals The dynamic responses characteristics of colluvial landslide based on model test

2019 ◽  
Vol 304 (3) ◽  
pp. 032078
Author(s):  
Yifan Yu ◽  
Ping Wang ◽  
Huijuan Wang ◽  
Shuya Xu ◽  
Haitao Guo
Keyword(s):  
Model Test ◽  
Dynamic Responses ◽  
Colluvial Landslide

Mechanism of colluvial landslide induction by rainfall and slope construction: A case study

2021 ◽  
Vol 18 (4) ◽  
pp. 1013-1033
Author(s):  
Zhou Zhou ◽  
Jun-hui Shen ◽  
Ying Li ◽  
Wei-feng Duan ◽  
Ri-chang Yang ◽  
...  
Keyword(s):  
Colluvial Landslide

Research on Suitable Anti-Sliding Piles Spacing Considering of Soil Arch Effect in Colluvial Landslide

2013 ◽  
Vol 671-674 ◽  
pp. 262-265
Author(s):  
Lin Na Sun ◽  
Jing Li ◽  
Lei Wang
Keyword(s):  
Equation Of State ◽  
Internal Friction ◽  
Friction Angle ◽  
Engineering Practice ◽  
Stress Model ◽  
Arch Effect ◽  
Soil Arch ◽  
Adjacent Soil ◽  
The Relationship ◽  
Colluvial Landslide

Suitable anti-sliding spacing is one of the most important parameters in the design of anti-sliding piles. It is closely related to whether the soil arch effect can be completely played. Based on analyzing the stress model of soli arch effect on the adjacent soil, the relationship between the piles spacing and the cohesive force c as well as the internal friction angle of the soil behind piles is proposed. The reasonable pile spacing formula which based on the limiting equilibrium equation of state was deduced and verified the method with engineering practice.

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