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- 저자 : Xianda Feng (검색결과 2 건)
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Prediction of Slope Stability using Naive Bayes Classifier
Xianda Feng,Shuchen Li,Chao Yuan,Peng Zeng,Yang Sun 대한토목학회 2018 KSCE JOURNAL OF CIVIL ENGINEERING Vol.22 No.3
Slope stability prediction is of primary concern in identifying terrain that is susceptible to landslides and mitigating the damages caused by landslides. In this study, a Naive Bayes Classifier (NBC) was employed to predict slope stability for a slope subjected to circular failures, based on six input factors: slope height (H), slope angle (α), cohesion (c), friction angle (φ), unit weight (γ), and pore pressure ratio (ru). An expectation maximization algorithm was used to perform parameter learning for the NBC with an incomplete data set of 69 slope cases. The model validation with 13 new cases shows that, when compared to the existing empirical approach, the proposed NBC model yields better performance in terms of both accuracy and applicability (i.e., the NBC allows us to determine the probability of slope stability based on any subset of the six input factors).
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Mechanical Behaviour of a Large-span Double-arch Tunnel
Shuchen Li,Chao Yuan,Xianda Feng,Shucai Li 대한토목학회 2016 KSCE JOURNAL OF CIVIL ENGINEERING Vol.20 No.7
A scaled physical model test and numerical simulations of a shallow-buried double-arch tunnel, the Great Wall Ridge Tunnel (GWRT), are performed as a first step toward a full understanding of the deformation of double-arch tunnels in shallow formations. The instrumentation of the model experiment includes high-accuracy dial gauges, miniature stress sensors, and strain gauges to record the mechanical responses of the tunnel supporting system and the surrounding rocks. The experiment strictly follows the designed excavation procedure planned for the GWRT, and the results show good agreement with those obtained from numerical simulations. We focus on the accurate approximation of the ground movement in order to ensure the safety of a neighbouring ancient relic, the Great Wall of the Qi. We also investigate the stress distributions of the surrounding rock formations and the middle wall. Based on the settlements of the ground and the plastic zone distribution, we conclude that the current design of the GWRT construction could potentially damage the neighbouring historical site.
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