A back-propagation network for the assessment of susceptibility to rock slope failure in the eastern portion of the Southern Cross-Island Highway in Taiwan |
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| Authors: | Chih-Hao Chen Chien-Chung Ke Chein-Lee Wang |
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| Institution: | (1) Department of Resources Engineering, National Cheng Kung University, No. 1, University Road, Tainan, 701, Taiwan;(2) Geotechnical Engineering Research Center, Sinotech Engineering Consultants, Inc, Taipei, 110, Taiwan |
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| Abstract: | An assessment of the susceptibility to rock slope failure by means of a back-propagation network is proposed for the eastern
portion of the Southern Cross-Island Highway in Taiwan. The model was developed on the basis of six influence parameters of
rock slope instability, which include the rock type, slope aspect, slope angle, joint set number, joint spacing and bedding–slope
relationship. The values of these influence parameters were used as inputs for the network and were classified as nominal
scales in terms of binary numbers, while the state of failure/non-failure of a given slope was assumed to be the output variable.
Data on a total of 170 slopes along the highway was fed into the network for learning. According to the outputs of the network,
the susceptibility to rock slope failure is categorized into four levels, namely low, medium–low, medium and high, which are
mapped along the highway. Three highly susceptible regions are found, which can be viewed as hazardous sections requiring
cautionary measures. Moreover, the proposed model can be used as a tool for determining the possible state of an unfamiliar
rock slope in the context of devising management strategies to be applied to the investigated portion of the highway. |
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| Keywords: | Slope failure Susceptibility Back-propagation Highway Taiwan Landslides Geohazards Geomorphology |
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