Improved Hybrid Reasoning Approach to Safety Risk Perception under Uncertainty for Mountain Tunnel Construction

2021 ◽  
Vol 147 (9) ◽  
pp. 04021105
Author(s):  
Qijie Cai ◽  
Qijun Hu ◽  
Guoli Ma
2019 ◽  
Vol 38 (5) ◽  
pp. 528-536
Author(s):  
Ruishi Si ◽  
Meizhi Wang ◽  
Qian Lu ◽  
Shuxia Zhang

Carcass waste recycling exerts an important influence on preventing epidemic diseases, improving the ecological environment, and promoting sustainable development of the livestock industry although it has rarely aroused widespread attention throughout the world. Based on the data of 470 households engaged in breeding pigs in Hebei, Henan, and Hubei, China, and considering dead pigs as an example, this study employed the Double Hurdle model to assess impact of risk perception on household dead pig recycling behaviour and further tested the moderating effects of environmental regulation on the impact of risk perception on household dead pig recycling behaviour. The results show that: (1) Risk perception has a positive and significant influence on household dead pig recycling behaviour; however, this influence is mainly caused by households’ production and public health safety risk perceptions. Food and ecological safety risk perceptions have no significant influence on household dead pig recycling behaviour. (2) Environmental regulation has enhanced moderating effects on the impact of risk perception on household dead pig recycling behaviour, but the moderating effects mainly arose from imperative, guiding, and voluntary regulations. A moderating effect of incentive regulation is not obvious. (3) The moderating effects of environmental regulations present strong heterogeneity when different breeding scales and recycling technical attributes are considered. Finally, some policy implications, such as improving households’ risk perception level, enhancing environmental regulation intensity, and classifying to formulate measures, are proposed.


2016 ◽  
Vol 53 (2) ◽  
pp. 326-342 ◽  
Author(s):  
Guo-Hua Zhang ◽  
Yu-Yong Jiao ◽  
Li-Biao Chen ◽  
Hao Wang ◽  
Shu-Cai Li

Risk management for safety in mountain tunnel construction is of great significance. However, existing research lags behind engineering applications. In this paper, the risk of mountain tunnel collapse is used as an example to illustrate a new assessment method based on case-based reasoning, advanced geological prediction, and rough set theory. First, the risk surroundings and risk factors involved in tunnel collapse are integrated and summarized, and a risk assessment index system is established for tunnel collapse. At the same time, because the dynamic response parameters obtained by the advanced geological prediction usually indicate a typical geological structure, sensitive response parameters are introduced in the assessment index system. Advanced risk assessment can be performed for tunnel sections at a certain distance ahead of the tunnel face. Second, the major risk surroundings and the advanced geological prediction results are analyzed for the tunnel under assessment. Cases with similar attribute characteristics are selected via comparison with previous cases. Attribute reduction and calculation of weights are subsequently performed for the risk surroundings and risk factors of similar cases based on the attribute significance theory of rough sets. Finally, index screening and objective weights are applied in the fuzzy comprehensive assessment model. The results of this paper can be used to improve the theoretical level and reliability of risk assessment in tunnel safety and serve as a reference for tunnel construction.


2020 ◽  
Vol 11 (1) ◽  
pp. 766-785 ◽  
Author(s):  
Xiuling Wang ◽  
Jinxing Lai ◽  
Junling Qiu ◽  
Wei Xu ◽  
Lixin Wang ◽  
...  

2013 ◽  
Vol 353-356 ◽  
pp. 1490-1494
Author(s):  
Zhi Chun Liu

Groundwater flow into mountain tunnel can lead to drawdown and groundwater loss in tunnel construction and operation stages under drainage and limited drainage principle conditions. The author defines groundwater recovery degree of drawdown and volume change, and simulate drawdown and groundwater recovery process adopting nonhomogeneous and anisotropic equivalent tunnel flow model, and study influencing effect of various factors to groundwater recovery by numerical method. The results show that the essential condition of groundwater recovery in tunnel is that groundwater recharge is greater than groundwater inflow volume, which can be controlled by efficient waterproof and drainage measures. The efficient measures include curtain grouting, radial grouting and high impermeability performance of shotcrete.


2017 ◽  
Vol 132 ◽  
pp. 30-46 ◽  
Author(s):  
Limao Zhang ◽  
Lieyun Ding ◽  
Xianguo Wu ◽  
Miroslaw J. Skibniewski

2011 ◽  
Vol 71-78 ◽  
pp. 4026-4030
Author(s):  
Xing Hua Wang ◽  
Peng Tu

It is hard to control the high pressure water in mountain tunnel construction. Distribution of seepage field, stress field and displacement field of tunnel are analyzed by numerical method with equivalent continuum model. And distribution rule of groundwater in rock, grouting circle and lining are also analyzed. The results of the study show that water pressure behind lining has a close relationship with rock, grouting circle, thickness of lining, permeability coefficient and drainage of tunnel.


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