Risk assessment of water inrush in karst tunnels based on attribute synthetic evaluation system

Li, Shucai; Zhou, Zongqing; Li, Liping; Xu, Zhenhao; Zhang, Qian‐qing; Shi, Shaoshuai

doi:10.1016/j.tust.2013.05.001

Cited by 227 publications

(92 citation statements)

References 21 publications

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“…Evaluation matrix C i is composed of membership degree of first level evaluation index R ij , and the membership degree can be determined by using single index measure functions as shown in Table 3. To be simplified, related literatures (Saaty 1979(Saaty , 1990Zhou 2010;Li et al 2013;Shi et al 2014) can also be consulted for the specific steps.…”

Section: Calculation Of Measure Functionsmentioning

confidence: 99%

Risk assessment model of expansive soil slope stability based on Fuzzy-AHP method and its engineering application

Zhang

Xiao

et al. 2018

Geomatics, Natural Hazards and Risk

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To systematically evaluate the risk grade of stability of expansive soil slope during construction, the recognition model is established by using the fuzzy recognition theory and the analytic hierarchy process (AHP). Based on the characteristics of shallow slide of 22 expansive soil road sections constructed in China, the condition of slope body, swell-shrink grade, hydraulic and meteorological characteristics, supporting and improvement measures and other factors such as the construction technology and management level, vegetation coverage, soil layer, and drying-wetting cycles are selected as the evaluation indices, and the corresponding criteria of risk assessment system of expansive soil slope stability are also established. The weights of evaluation indices are obtained by using AHP method, and the measure functions are established to assess single index measurement and synthetic measurement. The maximum membership degree criterion is adopted to discern the risk grade of expansive soil slope stability. Based on this, the stability of expansive soil slope with different condition located in Nanyou highway and Beijing west 6th ring highway of China are analysed to verify the reliability of the present method. For practical purposes, the present risk assessment methodology can be used to systematically assess the slope stability in expansive soil zones.

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Section: Calculation Of Measure Functionsmentioning

confidence: 99%

Risk assessment model of expansive soil slope stability based on Fuzzy-AHP method and its engineering application

Zhang

Xiao

et al. 2018

Geomatics, Natural Hazards and Risk

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“…Zhou et al [23] established an optimal classification method based on grey system theory (GST) to evaluate the risk of water inrush and predict the occurrence probability in karst tunnels. Li et al [24] put forward a method to evaluate the risk of water inrush in karst tunnels based on a synthetic attribute evaluation system.…”

Section: Introductionmentioning

confidence: 99%

Assessment of a Concealed Karst Cave’s Influence on Karst Tunnel Stability: A Case Study of the Huaguoshan Tunnel, China

Huang

et al. 2018

Sustainability

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Abstract:In order to assess a concealed karst cave's influence on karst tunnel stability, an assessment model is proposed based on the analytic hierarchy process and a statistical analysis of relevant engineering projects. Major factors are studied and selected as impact factors of the assessment model based on a statistical analysis on a karst cave' s development conditions (karst hydrogeological and engineering geological conditions), construction conditions, and controlling measures. A weight analysis of factors shows that the surrounding rock grade, supporting measurement, formation lithology, unfavorable geology, construction methods, blasting techniques, advanced geological forecast, and groundwater level are the main controlling factors of the tunnel stability when there is a concealed karst cave in the tunnel. Topography and geomorphology, attitude of rocks, monitoring measurement, strata combination, and interlayer fissures are the minor influence factors. Tunnel section shapes, in situ stress, and geological logging are the least important factors. The proposed method is successfully applied to the assessment of a concealed karst cave's influence on the stability of the Huaguoshan Tunnel on the Enshi-Laifeng and Enshi-Qianjiang Expressways. The evaluation result agrees well with the construction site situation. In addition, the result provides good guidance with respect to the implementation of the treatment scheme and effectively avoids accidents in real-time.

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“…If the water-resistant thickness between concealed cavity filled with pressurized water and tunnel is not enough, the waterresistant strata suddenly collapses under construction disturbance, and water inrush occurs without any advanced prevention measures. e process of karst water inrush is sudden, instantaneous, and difficult to predict and causes economical loss and serious casualties [2][3][4]. In km 5 + 608 of Koohrang tunnel with a 23.409 km length located at the center of the High Zagros Mountains in Iran, a huge amount of water rushed into the tunnel.…”

Section: Introductionmentioning

confidence: 99%

Using the Schwarz Alternating Method to Identify Critical Water‐Resistant Thickness between Tunnel and Concealed Cavity

Guo

Chen

Fan³

et al. 2018

Advances in Civil Engineering

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is paper aims to estimate the stability of the water-resistant strata between the tunnel and the small-medium-sized concealed cavity filled with high-pressurized water or other fillings at optional position around tunnel through solving the double-hole problem. e analytical method to identify the critical water-resistant thickness is proposed based on the Schwarz alternating method and Griffith strength criterion, and the program to calculate the critical thickness was prepared according to this method using mathematical software. Parametric study of the critical thickness indicates that the critical water-resistant thickness will increase with the buried depth of the tunnel and cavity size; the lateral pressure coefficient has more complicated influence on the critical thickness, which is affected by cavity position; when the cavity is filled with sand or gravel, the critical water-resistant thickness will decrease with the increase of the filling pressure; and when the cavity is filled with the high-pressurized water, the critical thickness will decrease as the water pressure initially and increase afterwards. e analytical result of the critical thickness is consistent with that obtained by numerical simulation using the user-defined program based on FLAC 3D , demonstrating the rationality and feasibility of the proposed method in this study.

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Risk assessment of water inrush in karst tunnels based on attribute synthetic evaluation system

Cited by 227 publications

References 21 publications

Risk assessment model of expansive soil slope stability based on Fuzzy-AHP method and its engineering application

Risk assessment model of expansive soil slope stability based on Fuzzy-AHP method and its engineering application

Assessment of a Concealed Karst Cave’s Influence on Karst Tunnel Stability: A Case Study of the Huaguoshan Tunnel, China

Using the Schwarz Alternating Method to Identify Critical Water‐Resistant Thickness between Tunnel and Concealed Cavity

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