Article
Materials Science, Multidisciplinary
Chengzhong Wang, Shuangjian Niu
Summary: This paper uses the four grades slope of Yunmao Expressway in China as an example to study the stability of reinforced weathered rock slope through engineering monitoring and numerical simulation. The results show that the reinforcement method can effectively guarantee the stability of the slope.
FRONTIERS IN MATERIALS
(2023)
Article
Multidisciplinary Sciences
Jian Zhang, Shihua Zhang, Yong Ding, David Z. Zhu
Summary: Site investigation, deformation monitoring, laboratory test, and theoretical calculations were used to analyze the evolution details of a large expressway roadside landslide during the start-up sliding process. The monitoring results show that the initial deformation and failure occurred on the protective wall at the slope toe, then gradually developed to the upper part of the slope, and finally led to tensile cracks at the slope trailing edge. The infiltrated rainwater can change the weight, the osmotic pressure, the anti-sliding force, the sliding force of the sliding mass, and further soften the fully weathered tuff soil and reduce its strength, resulting in the landslide occurrence.
SCIENTIFIC REPORTS
(2023)
Article
Geosciences, Multidisciplinary
Defu Tong, Aijun Su, Fei Tan, Jiandong Tang, Xiongwei Yi
Summary: Water-rich slopes like the Pingyikou Landslide in China's Three Gorges Reservoir area are susceptible to failure due to continuous rainfall. This study used detailed field investigations and monitoring of rainfall, water level, and displacement to understand the deformation process and genetic mechanism of the landslide. Numerical simulations and unsaturated seepage analysis were also conducted to study the impact of different initial conditions and antecedent rainfall on slope stability. The results showed that rainfall and groundwater level strongly influenced the slope deformation, and more than 10 days of antecedent rainfall should be considered for slope design and control.
JOURNAL OF EARTH SCIENCE
(2023)
Article
Engineering, Civil
Jeong-Yeon Yu, Jong-Won Woo, Kyung-Nam Kang, Ki-Il Song
Summary: This study aims to establish the correlations between variables related to a slope during rainfall and factor of safety (FOS) and displacement. The results show that the contributions of various slope-related variables vary according to the soil type, and the friction angle and cohesion are negatively correlated with displacement while the rainfall duration and rainfall intensity are positively correlated with displacement.
GEOMECHANICS AND ENGINEERING
(2023)
Article
Engineering, Environmental
Qiuxiang Huang, Jialin Wang, Pinnaduwa H. S. W. Kulatilake, Haofeng Guo, Jipeng Shen
Summary: This study conducted geological and geotechnical research to identify the causes and mechanisms of a reinforced embankment slope failure. Through surface investigations and borehole data analysis, the landslide process was understood, and factors contributing to the landslide were identified. Subsurface features were determined, and laboratory tests were carried out to estimate the geomechanical properties of the slope materials. Slope stability analyses were performed to evaluate the reinforcement system and analyze the failure mechanism. The results highlight the importance of rainfall as the main inducing factor and the role of groundwater in the slope instability.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2023)
Article
Engineering, Geological
Shunzo Kawajiri, Takayuki Kawaguchi, Dai Nakamura, Satoshi Yamashita
Summary: This study evaluates the collapse risk of two test embankments under different degrees of compaction using the critical rainfall curve and verifies its applicability during the snowmelt season. The results show that the critical rainfall curve can effectively assess the collapse risk for low-density embankments, while it is challenging to evaluate the risk for high-density embankments due to the omission of gully erosion.
GEOTECHNICAL AND GEOLOGICAL ENGINEERING
(2022)
Article
Environmental Sciences
Ugur Safak Cavus, Murat Kilit
Summary: This paper presents a study and treatment methods of a leakage problem in an embankment dam located in a seismically active area. The study identifies the source of the leakage as a deterioration of the bottom outlet, which resulted in high water uplift pressure and saturation of the downstream sandyfill. The paper discusses two different treatment techniques and concludes that driving an HDPE pipe into the existing steel bottom outlet pipe is a rapid, economical, and effective solution to prevent the leakage. The study provides valuable insights for addressing similar leakage problems in other embankment dams.
ENVIRONMENTAL EARTH SCIENCES
(2022)
Review
Green & Sustainable Science & Technology
Joram Wachira Mburu, An-Jui Li, Horn-Da Lin, Chih-Wei Lu
Summary: In the past 30 years, research on rainfall-induced landslides has made significant progress. The contribution of matric suction and water flow in unsaturated soils has been widely accepted. However, the application of unsaturated soil mechanics in geotechnical engineering practice has been slow due to practical limitations. This paper conducts a parametric study on unsaturated silty slopes and identifies the suitable slope and hydrologic conditions for preliminary stability analysis. The results show that suction plays a significant role in silt/clay slopes with a water table below the mid-height of the slope, while slope height becomes the primary controlling factor for slopes with a height of 20 m or more and a high water table. Two case studies are presented to review the application of geotechnical software in rainfall seepage and stability analyses of unsaturated slopes, which demonstrate notable differences in output results due to different methods and approaches.
Article
Chemistry, Multidisciplinary
Tamara Bracko, Bojan Zlender, Primoz Jelusic
Summary: The objective of this study is to determine the impacts of expected climate change on slope stability. Through a case study, it is found that lower cohesion and increased net infiltration of water are important factors leading to slope instability. Planting and controlling surface water runoff can be a relatively simple and cost-effective measure to reduce net infiltration, which is an effective solution.
APPLIED SCIENCES-BASEL
(2022)
Article
Engineering, Geological
Shu-wei Sun, Liu Liu, Jia-bing Hu, Hui Ding
Summary: This study reports on a rain-induced landslide that occurred in the Fushun west open pit in China in 2016. The failure characteristics and formation mechanism of the landslide were explored through field investigations, laboratory tests, and numerical analyses. The study revealed that heavy rainfall triggered the landslide and the process of landslide formation can be divided into several stages. The findings contribute to the understanding of landslide mechanisms and can be applied for evaluating slope stability and early identification of open-pit mines, both active and inactive.
Article
Construction & Building Technology
Murat Kilit, Ugur Safak Cavus, Ismail Zorluer
Summary: This study identifies the cause of embankment leakages and emphasizes the importance of site evaluations in addition to numerical analyses. The results reveal that the leakage is related to both seepage from the reservoir and groundwater inflow, and is primarily caused by a malfunctioning filter layer. Moreover, the slope stability of the dam is deemed unreliable even under current conditions.
JOURNAL OF PERFORMANCE OF CONSTRUCTED FACILITIES
(2023)
Article
Chemistry, Multidisciplinary
Jian-Jie Jiang, Zhen-Dong Cui
Summary: This study investigated the effects of rainfall intensity and rainfall time on the stability of high liquid limit soil slope through in-site monitoring and numerical simulation. The results showed that rainfall intensity had a greater impact on the safety factor of the slope, with higher intensity leading to shallow landslides. A dimensionless displacement coefficient K was proposed to quantify landslide displacement under different rainfall, and a method was proposed to measure cumulative displacement of a slope where sensors were not placed.
APPLIED SCIENCES-BASEL
(2022)
Article
Geosciences, Multidisciplinary
Ikuo Towhata, Satoshi Goto, Shigeru Goto, Takeshi Akima, Junya Tanaka, Taro Uchimura, Gonghui Wang, Hiroshi Yamaguchi, Shogo Aoyama
Summary: In October 2013, a volcanic slope in Izu Oshima Island, Japan experienced a rain-induced disaster due to the geohydrological features of the underlying lava layer. Only during extremely heavy rain, the subsurface lava topography triggered slope failure, with the remaining parts of the slope remaining stable for 7 years after the disaster, allowing for the reconstruction of local infrastructures.
Article
Engineering, Environmental
Xiang Yu, Bin Gong, Chun'an Tang
Summary: The study investigates the slope stability under alternating excavation and rainfall disturbance using separate simulation of excavation stress field and rainfall seepage field. By analyzing the pore water pressure and transient saturation zone in a highway slope in Guangdong Province, China, the effects of rainfall seepage and slope stresses were studied. Numerical computations using the strength reduction method showed that the proposed separate simulation and superposition analysis method is effective and suggests comprehensive slope stability treatment for other similar projects.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2021)
Article
Metallurgy & Metallurgical Engineering
Xiao-xiao Luo, Qin-guo Ma, Hai-qiang Jiang
Summary: The study analyzed factors influencing embankment stability, established an evaluation scheme, and adopted different geothermal regulation measures based on different geomorphological environments to ensure embankment stability.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2021)
