Influence of Tunnel Excavation on the Stability of a Bedded Rock Slope: A Case Study on the Mountainous Area in Southern Anhui, China

2020 ◽  
Vol 25 (1) ◽  
pp. 114-123
Author(s):  
Danqing Song ◽  
Xiaoli Liu ◽  
Zhuo Chen ◽  
Jundong Chen ◽  
Jianhua Cai
Keyword(s):  
Rock Slope ◽  
Mountainous Area ◽  
Tunnel Excavation ◽  
The Stability ◽  
Bedded Rock

scholarly journals Numerical Modelling of The Behavior of Tunnel in Soft Surrounding Rock. A Case Study of Djebel El-Ouahch Tunnel, Algeria.

2021 ◽  
Author(s):  
Barkane Aicha ◽  
Sami Mezhoud
Keyword(s):  
Reference Model ◽  
Soil Behavior ◽  
Tunnel Excavation ◽  
Circular Section ◽  
Geological Conditions ◽  
The Stability ◽  
Tunnel Cross Section ◽  
Calculation Code ◽  
Surrounding Soil

Abstract The response of a massif to stresses generated by tunnel excavation depends essentially on the geological conditions, the geometry of the tunnel and its underground position. The major problem related to the construction of these structures is to ensure the stability of the whole tunnel-ground, by controlling the various deformation generated during the constructionIn this context, the present paper examines the effect of these conditions on the behavior of tunnels and the surrounding soil. The study is applied to a real tunnel, in this case the tunnel of Djebel El Ouahch, Algeria was taken as a reference model. The research includes a parametric study to evaluate the effect of several parameters on the behavior of the tunnel and surrounding soil such as the tunnel anchoring depth, the tunnel-soil interface rate, and the shape of the tunnel cross section. The analysis is performed using the PLAXIS 3D TUNNEL calculation code with an elastoplastic Mohr-coulomb model for the soil behavior. The results show that the strongest and most stable position is the mid-deep tunnel with a circular section, with a non-slip interface between the tunnel and the ground. These outcomes can help to understand the effects of various influences parameters which control the stability of the tunnel in a soil with bad characteristics.

scholarly journals Buckling Analysis of Bedded Rock Slope Subject to Seismic Force – a Case Study in Karakoram Highway, Pakistan

2016 ◽  
Vol 2 (1) ◽  
pp. 17-24 ◽  
Author(s):  
Liping Liao ◽  
Yingyan Zhu ◽  
Zhiquan Yang ◽  
D.H. Zou ◽  
Waseem Muhammad ◽  
...  
Keyword(s):  
Rock Slope ◽  
Buckling Analysis ◽  
Seismic Force ◽  
Karakoram Highway ◽  
Bedded Rock

Physical Modeling of Landslide Mechanism in Oblique Thick-Bedded Rock Slope: A Case Study

2013 ◽  
Vol 87 (4) ◽  
pp. 1129-1136 ◽  
Author(s):  
FENG Zhen ◽  
YIN Yueping ◽  
LI Bin ◽  
YAN Jinkai
Keyword(s):  
Physical Modeling ◽  
Rock Slope ◽  
Landslide Mechanism ◽  
Bedded Rock

The Stability Research of Highway Bedded Rock Slope Based on the Stress Monitoring

2013 ◽  
Vol 351-352 ◽  
pp. 1253-1256
Author(s):  
Yong Jian Guo
Keyword(s):  
Slope Failure ◽  
Rock Slope ◽  
Deformation Monitoring ◽  
Stress Monitoring ◽  
It Use ◽  
Monitoring Method ◽  
The Stability ◽  
Bedded Rock ◽  
Failure Location ◽  
Test Result

Research on the problem to process the stability of bedded rock slope of monitoring, deformation monitoring were carried out difficulty .This paper carrying out the stress monitoring method to evaluate it. Use the strength reduction FEM to reach the slope failure location with different structure planes distance, and use the theory and project test of blot stress monitoring to verify. The result of the project test shows that the slope stress were tend to stability about 60 days after cut,the bolt maximum force value were 57.6 MPa,meet the requirement of reinforced design tensile strength,the test result shows that this slope tend to stability.

scholarly journals Stability Assessment of a Bedding Rock Slope Using Q-slope and Seismic Tomography: A Case Study in the Ecuadorian Amazon

2021 ◽  
Author(s):  
Jorge Ronny Espin ◽  
Sebastián Araujo
Keyword(s):  
Seismic Tomography ◽  
Rock Slope ◽  
Input Parameter ◽  
The Road ◽  
Core Recovery ◽  
Well Differentiated ◽  
The Stability ◽  
Stratified Rock

Roads are generally affected by slope failures, and these failures can increase when there are weathered materials and high rainfall. These circumstances occur in the sub-Andean zone of Ecuador. This is the region where the study area is located. The stability of a stratified rock slope, which is affecting a section of highway E45, was evaluated. The study slope is exposed to the road, but the upper part is covered by a soil-type material and dense vegetation that makes it challenging to study. We applied the Q-slope method and seismic tomography; these methods used together worked well, because they allowed to correlate and infer information about the quality of the rock mass, even in a fast and economical way. We also performed core drilling with core recovery in the crown of the slope and SPT test. The slope presented two well-differentiated zones; therefore, Q-slope values were calculated for each of these zones. The results show that the slope is unstable. The application of seismic tomography as an input parameter for calculating Q-slope was important because it allowed evaluating the stability where it is impossible to collect geomechanical information, correlate information taken at the foot of the slope, and define the depth of the bedrock.

scholarly journals Infrared Temperature Law and Deformation Monitoring of Layered Bedding Rock Slope under Static Load

2020 ◽  
Vol 2020 ◽  
pp. 1-16
Author(s):  
Zhigang Tao ◽  
Kuiming Liu ◽  
Xuebin Cui ◽  
Xiaobing Qiao ◽  
Xiaoming Sun
Keyword(s):  
Large Scale ◽  
Rock Slope ◽  
Test System ◽  
Deformation Monitoring ◽  
Open Pit ◽  
Ratio Test ◽  
Layered Rock ◽  
Monitoring Process ◽  
The Stability ◽  
Bedded Rock

China is a mountainous and hilly country with frequent large-scale landslides with complicated mechanisms and serious damage. The layered rock slopes have the worst stability, undergo the most serious damage, and have been rarely investigated due to limitations of measurement methods and instruments. Taking the Nanfen open-pit iron mine as an example, a physical large-model similarity ratio test system is used to simulate the landslide remote monitoring process. The development of the sliding surface, stress-strain characteristics, and infrared law of the bedded rock slope are analyzed. Results show that the anchor cable with constant resistance and large deformation plays a significant role in the stability of the slope, and its maximum slip force is 420 N and 630 N, respectively. Slip and crack are the main mechanisms of energy release in layered rock slope. Some scheme improvement measures for this kind of test are put forward, which provides basis and optimization scheme for the subsequent study of layered rock slope.

Applications of random graphs

2017 ◽  
Author(s):  
A.C.C. Coolen ◽  
A. Annibale ◽  
E.S. Roberts
Keyword(s):  
Social Networks ◽  
Random Graphs ◽  
Interaction Network ◽  
Power Grids ◽  
Protein Protein Interaction ◽  
Topological Features ◽  
First Case ◽  
The Stability ◽  
Protein Protein Interaction Network

This chapter reviews graph generation techniques in the context of applications. The first case study is power grids, where proposed strategies to prevent blackouts have been tested on tailored random graphs. The second case study is in social networks. Applications of random graphs to social networks are extremely wide ranging – the particular aspect looked at here is modelling the spread of disease on a social network – and how a particular construction based on projecting from a bipartite graph successfully captures some of the clustering observed in real social networks. The third case study is on null models of food webs, discussing the specific constraints relevant to this application, and the topological features which may contribute to the stability of an ecosystem. The final case study is taken from molecular biology, discussing the importance of unbiased graph sampling when considering if motifs are over-represented in a protein–protein interaction network.

Supplier Development at LG Electronics

2020 ◽  
Author(s):  
Hyojin Kim ◽  
Daesik Hur ◽  
Tobias Schoenherr
Keyword(s):  
Management Practice ◽  
Digital Technologies ◽  
Supply Management ◽  
Future Research ◽  
Supplier Development ◽  
Environmentally Conscious ◽  
Competitive Capabilities ◽  
The Stability ◽  
Buyer Firm

Supplier development has been a critical supply management practice since the 1990s. In many instances, it has even become imperative for buyer firms to support and prepare their supply bases for uncertain economic and market environments, socially and environmentally conscious customers, advances in digital technologies, and increasing competition. Yet, research that approaches supplier development with the objective to advance all these dimensions in an integrated fashion is scarce. This study fills this void by exploring how a buyer firm may address these emerging challenges in its supply base. Specifically, an in-depth case study of LG Electronics explores how the firm designs and operates multidimensional supplier development activities to foster the stability and sustainability of its supply base while enhancing its core suppliers’ competitive capabilities. This chapter illustrates how supplier development can be taken to the next level, presents implications for managerial practice, and outlines promising future research avenues.

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