scholarly journals Slope Failure Disasters in Northern Slope of Mt. Wanitsuka and Upstream Area of the Hiroto River due to Heavy Rainfall by the Typhoon0514 in Miyazaki Prefecture

2006 ◽  
Vol 47 (4) ◽  
pp. 232-241
Author(s):  
Mitsuhisa KOGA ◽  
Takenobu HORIKAWA ◽  
Akira USHIRO ◽  
Masahiro TANIUCHI
Keyword(s):  
Heavy Rainfall ◽  
Slope Failure ◽  
Northern Slope

scholarly journals Characteristics of ground motion and threshold values for colluvium slope displacement induced by heavy rainfall: a case study in northern Taiwan

2016 ◽  
Vol 16 (6) ◽  
pp. 1309-1321 ◽  
Author(s):  
Ching-Jiang Jeng ◽  
Dar-Zen Sue
Keyword(s):  
Slope Stability ◽  
Heavy Rainfall ◽  
Slope Failure ◽  
Drainage System ◽  
Threshold Value ◽  
Slope Instability ◽  
Disaster Prevention ◽  
Strain Gages ◽  
Slope Displacement ◽  
Northern Taiwan

Abstract. The Huafan University campus is located in the Ta-lun Shan area in northern Taiwan, which is characterized by a dip slope covered by colluvium soil of various depths. For slope disaster prevention, a monitoring system was constructed that consisted of inclinometers, tiltmeters, crack gages, groundwater level observation wells, settlement and displacement observation marks, rebar strain gages, concrete strain gages, and rain gages. The monitoring data derived from hundreds of settlement and displacement observation marks were analyzed and compared with the displacement recorded by inclinometers. The analysis results revealed that the maximum settlement and displacement were concentrated on the areas around the Hui-Tsui, Zhi-An, and Wu-Ming buildings and coincided with periods of heavy rainfall. The computer program STABL was applied for slope stability analysis and modeling of slope failure. For prevention of slope instability, a drainage system and tieback anchors with additional stability measures were proposed to discharge excess groundwater following rainfall. Finally, threshold value curves of rainfall based on slope displacement were proposed. The curves can be applied for predicting slope stability when typhoons are expected to bring heavy rainfall and should be significant in slope disaster prevention.

scholarly journals Evaluation of Dike and Natural Slope Failure Induced by Heavy Rainfall in Niigata on 13 July 2004

2006 ◽  
Vol 46 (1) ◽  
pp. 83-98 ◽  
Author(s):  
Hirofumi Toyota ◽  
Kouichi Nakamura ◽  
Naoki Sakai
Keyword(s):  
Heavy Rainfall ◽  
Slope Failure ◽  
Natural Slope

Characteristics of Groundwater Response to Precipitation for Landslide Prevention at Kiyomizu-Dera

2017 ◽  
Vol 12 (5) ◽  
pp. 993-1001
Author(s):  
Toru Danjo ◽  
Tomohiro Ishizawa ◽  
Masamitsu Fujimoto ◽  
Naoki Sakai ◽  
Ryoichi Fukagawa ◽  
...  
Keyword(s):  
Groundwater Level ◽  
Heavy Rainfall ◽  
Slope Failure ◽  
Field Measurements ◽  
Scale Model ◽  
Slope Failures ◽  
Wet Season ◽  
Soil Failure ◽  
Groundwater Response ◽  
Typhoon Season

Every year in Japan, slope failures often occur due to heavy rainfall during the wet season and typhoon season. The main reasons for soil failure are thought to be the increase of soil weight from infiltrated precipitation, the decrease in shear strength, and effects of the increase groundwater elevation. It is therefore important to consider to characteristics of groundwater behavior to improve slope disaster prevention. Kiyomizu-dera experienced major slope failures in 1972, 1999, and 2013, and a large slope failure occurred nearby in 2015. The two most recent events occurred since observation of precipitation and groundwater conditions began at the site in 2004. In this research, we determine the relationship between rainfall and groundwater level using both a full-scale model experiment and field measurements. Results indicate strong connection between rainfall intensity and the velocity of increase in groundwater level, indicating that it is possible to predict changes in the groundwater level due to heavy rainfall.

The Prediction of Northern Slope Deformation and Failure Caused by the Transformation of Open-Pit to Underground Mining in the Yanqianshan Iron Mine

2014 ◽  
Vol 580-583 ◽  
pp. 364-370
Author(s):  
An Lin Shao ◽  
Hai Long Feng
Keyword(s):  
Slope Failure ◽  
Underground Mining ◽  
Limit Equilibrium ◽  
Failure Process ◽  
Open Pit ◽  
Northern Slope ◽  
Body Distribution ◽  
Ore Bodies ◽  
Sublevel Caving ◽  
Iron Mine

<span><p class="TTPAbstract"><span lang="EN-US">The Yanqianshan<a name="OLE_LINK94"></a><a name="OLE_LINK93"></a> iron mine is preparing to transform from an open-pit mine to an underground mine. We adopt the <a name="OLE_LINK104"></a><a name="OLE_LINK103"></a>non-pillar sublevel caving approach to exploit the particularly thick steep ore bodies within the range from -183 m to -500 m from top to bottom. According to the features of ore body distribution and the approaches of exploitation, we expect that underground mining will result in <a name="OLE_LINK102"></a><a name="OLE_LINK101"></a>the loss of stability on the northern slope of the open pit, causing traction-type landslides. Moreover, along with increasing the depth of the mining operation, the range of slope failure will continue to expand and further affect the safety of drainage features and roads distributed on the north side of the open pit. For this purpose, we select f</span><span lang="EN-US">our</span><span lang="EN-US"> sections along the trending direction of ore bodies and apply the limit equilibrium method to predict the failure process and characteristics on the northern slope according to the stratified mining process.</span><span lang="EN-US"><o:p></o:p></span></p>

Forensic Study of Slope Failure Case During Heavy Rainfall: Suggested Preventative and Remedial Measures

2020 ◽  
Vol 38 (4) ◽  
pp. 3697-3707
Author(s):  
Dharmendra Kumar Srivastava ◽  
Vaishali Sahu ◽  
H. B. Raghavendra
Keyword(s):  
Heavy Rainfall ◽  
Slope Failure ◽  
Remedial Measures

Numerical Simulation of Mechanical Behavior on Landslides Triggered by Heavy Rainfall

2011 ◽  
Vol 50-51 ◽  
pp. 115-119
Author(s):  
Zhen Qiang Ni ◽  
Ji Ming Kong ◽  
A. Fayou
Keyword(s):  
Mechanical Behavior ◽  
Deformation Mechanism ◽  
Heavy Rainfall ◽  
Slope Failure ◽  
Shear Failure ◽  
Guizhou Province ◽  
Deformation And Failure ◽  
Finite Element Software ◽  
Large Landslide ◽  
Fixed Section

Deformation instability of slope due to rain was one of the most common geological disasters. Speaking from the mechanism, the destructive action and triggering action of rainfall affected the stability of slope itself, which made the slope deform and even lead to instability. June 28, 2010, Guanling in Guizhou province a large landslide occurred which triggered by continuous heavy rainfall, it caused that in two village-groups 107 villagers were buried, all the tragedy of houses were completely destroyed. Using finite element software ANSYS to simulate the mechanical behavior of the landslide, to analyze the deformation mechanism, we got that the large landslide deformation mechanism was a complex mechanical geological process. From the analysis of interaction between soil and rock, the landslide showed complex mechanical geological features. As rainfall increased the strength of unsaturated soil and weak intercalation reduced, this strengthened the role of the slope deformation and failure. The lock-fixed section first appeared brittle fracture, then that brought shear failure to the creeping section. The interaction between lock-fixed section and creeping section was the key of slope failure.

scholarly journals Forecasting Landslides via Three-Dimensional Discrete Element Modeling: Helong Landslide Case Study

2019 ◽  
Vol 9 (23) ◽  
pp. 5242 ◽  
Author(s):  
Wei Peng ◽  
Shengyuan Song ◽  
Chongjia Yu ◽  
Yiding Bao ◽  
Jiaxuan Sui ◽  
...  
Keyword(s):  
Heavy Rainfall ◽  
Slope Failure ◽  
Limit Equilibrium ◽  
Three Dimensional ◽  
Discrete Element ◽  
Discrete Element Modeling ◽  
Digital Elevation ◽  
Elevation Data ◽  
Urban Rural ◽  
Digital Elevation Data

Forecasting the occurrence potential of landslides is important but challenging. We aimed to forecast the failure potential of the Helong landslide, which is temporarily stable but has clearly deformed in recent years. To achieve the goal, we used reconnaissance, remote sensing, drilling, laboratory tests, topographical analysis, and electrical resistivity tomography (ERT). The factor of safety (FOS) of the slope was first calculated using a limit equilibrium method. The results show the FOS of the slope was 1.856 under natural conditions, 1.506 under the earthquake conditions, 1.318 under light rainfall, 0.986 under heavy rainfall, 1.075 under light rainfall and earthquake, and 0.832 under simultaneous heavy rainfall and earthquake. When the FOS is less than 1.35, the slope is considered metastable according to the Technical Code for Building Slope Engineering (GB50330-2013) published by the Chinese Ministry of Housing and Urban-Rural Development. Based on the drilling data and digital elevation data, a three-dimensional discrete element method (DEM) model was used to simulate potential landslides. The simulation was used to examine catastrophic slope failure under heavy rainfall conditions within a range of friction coefficients and the corresponding affected areas were determined. Then, we analyzed a typical run-out process. The dynamic information of the run-out behavior, including velocity, run-out distance, and depth, were obtained, which is useful for decision support and future landslide hazard assessment.

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