An Improved Extension System for Assessing Risk of Water Inrush in Tunnels in Carbonate Karst Terrain

Zhang, Kai; Zheng, Wenbo; Xu, Cong; Chen, Shougen

doi:10.1007/s12205-019-0756-0

Cited by 25 publications

(20 citation statements)

References 17 publications

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“…At present, how to determine the risk control scheme of water inrush is generally based on the assessed state of risk of water inrush, taking corresponding control measures combined with engineering experience, lacking clear research ideas or scientific theoretical research results to support findings. For example, the literature [3,[14][15][16][17][18][19][20] mainly focuses on the risk assessment of water inrush, but with little elaboration about how to formulate a risk control scheme against water inrush. In addition, these other reports did not describe water inrush risk assessment from the perspective of facilitating risk control programmes, resulting in a failure of the research results to provide sufficient, effective information.…”

Section: Basic Methods For Water Inrush Risk Control During Constructionmentioning

confidence: 99%

“…Factor and Solving the Extremum. Firstly, the conversion strength parameters c t and ϕ t in equations (16) and (18) are reduced according to equation (20). en, the objective function, including safety factor variables, is determined according to the internal energy dissipation and external force, as shown in equation 21:…”

Section: Constructing the Objective Function With A Safetymentioning

confidence: 99%

“…Li and Yang [15] proposed a risk assessment model for water and mud inrush in deep, long tunnels based on the grey clustering method. To evaluate the risk of water inrush in tunnels in carbonate karst terrain, Zhang et al [16] presented an improved assessment system based on extension assessment method. Its accuracy is verified by two examples.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Risk Control Technology for Water Inrush during the Construction of Deep, Long Tunnels

Liu

Xia

Lü

et al. 2019

Mathematical Problems in Engineering

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Water inrush is one of the main disasters occurring during tunnel construction in complex geological areas: once it happens, it can cause economic losses, casualties, and delay. Based on risk analysis and management, a risk control scheme is proposed as an effective means to control the risk of such a disaster; however, there are some deficiencies in existing research because the impacts of human factors on the risk of water inrush, dynamic changes in risk information during construction, and the diversity of types of water inrush are neglected. To enrich the research results of water inrush risk control and improve the effect of water inrush risk control, we first use the advantages of Bayesian network to analyse risk events, construct a Bayesian network structure chart of water inrush risk during construction, and propose a fuzzy probability risk analysis model for water inrush. The model can quickly track changes in risk information and diagnose the cause of water inrush disasters while providing an early warning thereof. In addition, considering that the diversity of water inrush types leads to differences in water inrush mechanisms, we believe that the formulation of any water inrush risk control scheme must be combined with water inrush mechanism analysis; therefore, we take a nondefect generated water inrush in front of the tunnel as a representative case and analyse the possible mechanism of water inrush through the stability analysis of the water-resisting strata. Then, based on the results of risk analysis and an analysis of the water inrush mechanism, a reasonable risk control scheme for water inrush is derived.

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Section: Basic Methods For Water Inrush Risk Control During Constructionmentioning

confidence: 99%

Section: Constructing the Objective Function With A Safetymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Risk Control Technology for Water Inrush during the Construction of Deep, Long Tunnels

Liu

Xia

Lü

et al. 2019

Mathematical Problems in Engineering

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“…e formation solubility coefficient (FSC) is defined to describe the solubility of the rock formations. e FSC is calculated by the formula FSC � 0.636t 1 + 0.259t 2 + 0.105t 3 , where t 1 , t 2 , and t 3 are proportions of lithology with strong, medium, and weak solubility, respectively [32], and the formation lithologies with strong, medium, and weak solubility have been defined by Zhang et al [33]. In general, the higher FSC always contributes to a higher karst development degree.…”

Section: Karst Development Degreementioning

confidence: 99%

Stability Assessment of Ground Surface along Tunnels in Karst Terrain Using Improved Fuzzy Comprehensive Evaluation

Zhang

Zhou

Chen

2021

Advances in Civil Engineering

Self Cite

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The stability of ground surface along tunnels in karst terrain is influenced by complex factors, among which the karst features are the significant ones. Under the influence of karst, the ground surface along tunnels is very easy to collapse, thus causing great casualties and economic losses. To provide guidance for maintaining the stability of ground surface along tunnels, an analysis system is proposed for assessing the stability of ground surface along tunnels in karst terrain based on an improved fuzzy comprehensive evaluation. Based on the case analysis of ground collapse along tunnels in karst terrain and the review of the related researches, the evaluation index system for ground surface stability assessment was established. The ridge-shaped membership functions were constructed to calculate the membership degree for the evaluation indices. The comprehensive weighting method combining the Fuzzy Analytical Hierarchy Process and correlation analysis was applied to determine weights for evaluation indices. And the ground surface stability level was recognized based on the maximum membership principle. The proposed assessment system was applied to assess the ground surface stability along the tunnels of Guiyang Metro Line 1, and the assessment results agreed well with the regional ground collapse history, verifying the effectiveness and reliability of the assessment system. Combining with the assessment results, a series of measures were conducted to promote the ground surface stability before tunnel excavation. This system provides a valuable tool for assessing and guiding to improve stability of the ground surface along tunnels in karst terrain.

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“…By using systematic and structural computation processes of matter-elements, the incompatible problems can be converted into compatible ones [33,43]. AHP can be combined with MEA to construct a synthetic method for multi-tier assessment, i.e., AHP-MEA, and this method integrates the advantages of AHP and MEA and was successfully used in the risk assessment by some researchers [36,44,45].…”

Section: Introductionmentioning

confidence: 99%

A Comprehensive Assessment Approach for Water-Soil Environmental Risk during Railway Construction in Ecological Fragile Region Based on AHP and MEA

Chen

Wang

et al. 2020

Sustainability

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With China’s government facilitating railway projects, more railway lines inevitably pass through ecological fragile regions (EFRs). Railway construction activities in EFRs might cause detrimental impacts on the local water-soil environment (WSE), which is the basis of the local ecological system that if destroyed can induce secondary disasters. Studies on the WSE risk (WSER) during railway construction in EFRs are limited. As such, this study aims to offer preliminary insight into the WSER assessment of railway construction in EFRs. WSERs were identified firstly based on the literature review and field surveys, and thus a risk index framework for WSER assessment including 5 categories of WSERs and 16 second-order risks was established. Then a comprehensive quantitative assessment method was developed by integrating analytic hierarchy process (AHP) and matter-element analysis (MEA) to assess the overall WSERs of railway construction in EFRs. A case (i.e., the Mingan subproject of Hefei-Fuzhou railway) was selected to demonstrate and validate the developed approach. Results show that the proposed assessment approach can be applied to evaluate the WSERs during railway construction. In addition, the case study demonstrates that the risk of construction methods should be the key focus. Findings from this study enrich the knowledge body of sustainable railways and guide the project managers to conduct practical WSER assessment of railway construction.

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An Improved Extension System for Assessing Risk of Water Inrush in Tunnels in Carbonate Karst Terrain

Cited by 25 publications

References 17 publications

Risk Control Technology for Water Inrush during the Construction of Deep, Long Tunnels

Risk Control Technology for Water Inrush during the Construction of Deep, Long Tunnels

Stability Assessment of Ground Surface along Tunnels in Karst Terrain Using Improved Fuzzy Comprehensive Evaluation

A Comprehensive Assessment Approach for Water-Soil Environmental Risk during Railway Construction in Ecological Fragile Region Based on AHP and MEA

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