scholarly journals State fusion entropy for continuous and site-specific analysis of landslide stability changing regularities

2018 ◽  
Vol 18 (4) ◽  
pp. 1187-1199 ◽  
Author(s):  
Yong Liu ◽  
Zhimeng Qin ◽  
Baodan Hu ◽  
Shuai Feng
Keyword(s):  
Stability Analysis ◽  
Cloud Model ◽  
Entropy Method ◽  
Landslide Stability ◽  
Specific Analysis ◽  
Geological Conditions ◽  
Macroscopic Deformation ◽  
Xintan Landslide ◽  
State Fusion

Abstract. Stability analysis is of great significance to landslide hazard prevention, especially the dynamic stability. However, many existing stability analysis methods are difficult to analyse the continuous landslide stability and its changing regularities in a uniform criterion due to the unique landslide geological conditions. Based on the relationship between displacement monitoring data, deformation states and landslide stability, a state fusion entropy method is herein proposed to derive landslide instability through a comprehensive multi-attribute entropy analysis of deformation states, which are defined by a proposed joint clustering method combining K-means and a cloud model. Taking Xintan landslide as the detailed case study, cumulative state fusion entropy presents an obvious increasing trend after the landslide entered accelerative deformation stage and historical maxima match highly with landslide macroscopic deformation behaviours in key time nodes. Reasonable results are also obtained in its application to several other landslides in the Three Gorges Reservoir in China. Combined with field survey, state fusion entropy may serve for assessing landslide stability and judging landslide evolutionary stages.

scholarly journals State fusion entropy for real-time and site-specific analysis of landslide stability changing regularities

2017 ◽  
Author(s):  
Yong Liu ◽  
Zhimeng Qin ◽  
Baodan Hu ◽  
Shuai Feng
Keyword(s):  
Stability Analysis ◽  
Real Time ◽  
Cloud Model ◽  
Entropy Method ◽  
The Real ◽  
Landslide Stability ◽  
Geological Conditions ◽  
Xintan Landslide ◽  
Landslide Early Warning ◽  
State Fusion

Abstract. Stability analysis is of great significance to landslide hazard prevention, especially the real-time stability. However, many existing stability analysis methods are difficult to analyse the real-time landslide stability and its changing regularities in a uniform criterion due to the unique landslide geological conditions. Based on the relationship between displacement monitoring data, deformation states and landslide stability, a state fusion entropy method is herein proposed to derive landslide instability through a comprehensive multi-attribute entropy analysis of deformation states which are defined by a proposed joint clustering method combining K-means and cloud model. Taking Xintan landslide as the detailed case study, cumulative state fusion entropy presents an obvious increasing trend after the landslide entered accelerative deformation stage and historical maxima match highly with the evolutionary stages of Xintan landslide in key time nodes. Reasonable results are also obtained in its application to several other landslides in the Three Gorges Reservoir in China. Combined with field survey, state fusion entropy may serve as a novel index for judging landslide stability changing regularities and for landslide early warning.

scholarly journals Numerical investigation on the tunneling and mining induced geo-hazards: Case study in Quang Ninh, Vietnam

2020 ◽  
Vol 14 (3) ◽  
pp. 67-74
Author(s):  
Nguyen Cong Giang ◽  
Nguyen Van Manh ◽  
Nguyen Quang Phich
Keyword(s):  
Numerical Methods ◽  
Numerical Method ◽  
Rock Mechanics ◽  
Underground Mining ◽  
Construction Technology ◽  
Underground Structures ◽  
Analysis And Design ◽  
Specific Analysis ◽  
Geological Conditions

In the field of rock mechanics, underground construction and mining, there have been many proposed methods for studying geo-hazards and also many research results that have been published in the world. In Vietnam, the numerical method is mainly used for analysis and design but not going deeply to predict the possible causes that lead to geo-hazards due to complex geological conditions. On the other hand, underground constructions and exploitation projects are often designed based on standards, regulations and experiences. The physical mechanism as well as the possibility of geo-hazards occurred when constructing underground structures and mining can take on various forms, depending on geological conditions and construction technology. Therefore, using numerical methods to simulate and analyze the possible geo-hazards is essential. This article presents a number of specific analysis cases, taking into account geological conditions and boundary conditions, and from that, raising a number of issues to note when using numerical methods. Keywords: underground mining; numerical method; geo-hazards; rock mechanics; FLAC2D.

Recovery Execution in Landslide at the Portal of Highway Tunnel

2011 ◽  
Vol 250-253 ◽  
pp. 1823-1826 ◽  
Author(s):  
Kai Wang ◽  
Hai Gui Kang ◽  
Hai Tao Wang
Keyword(s):  
Stability Analysis ◽  
Limit Equilibrium ◽  
Limit Equilibrium Method ◽  
Surrounding Rock ◽  
Landslide Stability ◽  
Highway Tunnel ◽  
Design Requirements ◽  
The Stability ◽  
Ground Condition

The main feature of NATM is to utilize all available means to develop the maximum self-supporting capacity of the surrounding rock or soil itself, and to undertake investigation and monitoring during construction to provide the stability of the tunnel. If undetected worse ground condition is encountered, the strengthening works will be carried out to ensure safety. In this case study, taking the Wangkeng tunnel portal engineering of the Jiyuan-Shaoyuan Expressway in Henan Province as an example, the calculation and evaluation of landslide stability are performed by limit equilibrium method and FEM. Based on the results of stability analysis, the anti-slide piles and ground drainage are adopted as the harnessing measures of landslide. Comparison of stability analysis before/after landslide harnesses was made by FEM. The results show that these treatments can satisfy the design requirements. It could be a useful reference to the design and construction of tunnels with soil entrance.

scholarly journals Railway Container Station Reselection Approach and Application: Based on Entropy-Cloud Model

2017 ◽  
Vol 2017 ◽  
pp. 1-14 ◽  
Author(s):  
Wencheng Huang ◽  
Bin Shuai ◽  
Lei Wang ◽  
Eric Antwi
Keyword(s):  
Cloud Model ◽  
Average Distance ◽  
Phase 1 ◽  
Transportation Cost ◽  
Entropy Method ◽  
Phase 2 ◽  
Phase 3 ◽  
Container Freight ◽  
Alternative Decision

Reasonable railway container freight stations layout means higher transportation efficiency and less transportation cost. To obtain more objective and accurate reselection results, a new entropy-cloud approach is formulated to solve the problem. The approach comprises three phases: Entropy Method is used to obtain the weight of each subcriterion during Phase  1, then cloud model is designed to form the evaluation cloud for each subcriterion during Phase  2, and finally during Phase  3 we use the weight during Phase  1 to multiply the initial evaluation cloud during Phase  2. MATLAB is applied to determine the evaluation figures and help us to make the final alternative decision. To test our approach, the railway container stations in Wuhan Railway Bureau were selected for our case study. The final evaluation result indicates only Xiangyang Station should be renovated and developed as a Special Transaction Station, five other stations should be kept and developed as Ordinary Stations, and the remaining 16 stations should be closed. Furthermore, the results show that, before the site reselection process, the average distance between two railway container stations was only 74.7 km but has improved to 182.6 km after using the approach formulated in this paper.

scholarly journals Stateczność zbocza i zagrożenie osuwiskowe w świetle kompleksowych badań geologicznych

2017 ◽  
Vol 26 (1) ◽  
pp. 85-98 ◽  
Author(s):  
Ireneusz Gawriuczenkow ◽  
Łukasz Kaczmarek ◽  
Kamil Kiełbasiński ◽  
Sebastian Kowalczyk ◽  
Radosław Mieszkowski ◽  
...  
Keyword(s):  
Stability Analysis ◽  
Slope Stability ◽  
Equilibrium State ◽  
Spatial Planning ◽  
Slope Stability Analysis ◽  
Southern Poland ◽  
Geological Conditions ◽  
Destabilizing Factors ◽  
Multistep Procedure

The multistage methodology of the slope stability analysis, based on a case study, is presented in the paper. The study area is located in southern Poland, where geological conditions are complex. A numerous complementary research techniques that were applied provided reliable and exact assessment of equilibrium state of the slope. The results have shown that presented multistep procedure takes into account various destabilizing factors and therefore enables the prediction of the future spatial planning.

scholarly journals Comparison between electrical resistivity tomography and tunnel seismic prediction 303 methods for detecting the water zone ahead of the tunnel face: A case study

2020 ◽  
Vol 12 (1) ◽  
pp. 1094-1104
Author(s):  
Nima Dastanboo ◽  
Xiao-Qing Li ◽  
Hamed Gharibdoost
Keyword(s):  
Electrical Resistivity ◽  
Electrical Resistivity Tomography ◽  
Geological Structure ◽  
Rock Properties ◽  
Electrical Tomography ◽  
Tunnel Face ◽  
Resistivity Tomography ◽  
Geological Conditions ◽  
Seismic Prediction

AbstractIn deep tunnels with hydro-geological conditions, it is paramount to investigate the geological structure of the region before excavating a tunnel; otherwise, unanticipated accidents may cause serious damage and delay the project. The purpose of this study is to investigate the geological properties ahead of a tunnel face using electrical resistivity tomography (ERT) and tunnel seismic prediction (TSP) methods. During construction of the Nosoud Tunnel located in western Iran, ERT and TSP 303 methods were employed to predict geological conditions ahead of the tunnel face. In this article, the results of applying these methods are discussed. In this case, we have compared the results of the ERT method with those of the TSP 303 method. This work utilizes seismic methods and electrical tomography as two geophysical techniques are able to detect rock properties ahead of a tunnel face. This study shows that although the results of these two methods are in good agreement with each other, the results of TSP 303 are more accurate and higher quality. Also, we believe that using another geophysical method, in addition to TSP 303, could be helpful in making decisions in support of excavation, especially in complicated geological conditions.

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