Safety Risk Analysis of the Slope at Yangnangou Tunnel Exit
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Abstract:
Road slope instability is likely to cause significant losses of human life, property, and economic activities; therefore the slope safety risk assessment is an important task in the engineering construction. In this paper, the slope at the outlet of Yangnangou tunnel on the road between Shiyan and Baihe of Hubei Province was investigated using the, Monte Carlo simulation to obtain its stability coefficient and probability to failure under the conditions of normal and abnormal conditions. Additionally, the vulnerability for the hazard-affected body within the impacted area was analyzed, which can provide the possible economic losses and population casualties through the risk calculation formula. The results showed that the level of risk of the slope at the Yangnangou tunnel exit under the normal working conditions is class I, while the level of risk under the abnormal working conditions is class II . According to the risk acceptance criteria, this slope had less risk under the normal working conditions and the risk was within the acceptable range. This slope had higher risk under the abnormal working conditions; therefore the deformation of the slope needs to be monitored, especially under the construction process and adverse natural conditions.
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