Geotechnics for Sustainable Infrastructure Development pp 1209-1216 | Cite as
A New Rainfall Threshold Model for Predicting Ground Movement Occurrences Based on Geotechnical Monitoring Data the at the Hai Van Pass
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Hai Van station is one of the most important railway stations in Vietnam, where landslides have occurred, especially during the rainy season. At this site a modern real time monitoring system has been set up. In this study, rainfall and soil displacement data were collected and analyzed by three methods, i.e., Caine (1980); Lumb (1975) and Kanungo & Sharma (2014). The results from three methods were compared and as a result, a modification from Lumb’s method was proposed. The paper found that with rainfall intensity of 27.5 mm per hour during 5 hours or with rainfall intensity of 5.68 mm per hour during 22 hours, it is sufficient to trigger potential landslide activities. The cumulative rainfall from upper 8 days with amount of 220 mm and rainfall intensity reaching at 156.5 mm per hour can also trigger potential landslide.
Keywordslandslide Hai Van station rainfall threshold geotechnical monitoring
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Most of the data used in this study are kindly supported by the Institute of Transport Science and Technology (ITST), Vietnam.
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