Analysis and Application of Lining Resistance to Water Pressure in Tunnel through Karst Cave

Huang, Mingli; Li, Jiacheng; Yang, Ze; Zhang, Zhien; Song, Yuan

doi:10.3390/app12157605

Cited by 2 publications

(1 citation statement)

References 17 publications

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“…Under such circumstances, the displacement field and stress field of the tunnel surrounding rock in karst areas, as well as the damage mode of the geotechnical bodies around this tunnel may have different response characteristics with the presence of the karst cave. Through the statistics on the occurrences of geological hazards in tunnels under complex and variable geological conditions, it was discovered that water inrush accidents [2,3] and collapse accidents [4] occurred more frequently in karst regions [5]. The size of the cavern [6], the orientation relationship between the cavern and the tunnel [7], and the clear distance between the cavity and the tunnel [8] could also have a significant impact on the reliability of the tunnel surrounding rock and the rock and soil masses around the karst cave.…”

Section: Introductionmentioning

confidence: 99%

A Calculation Method for Reliability Index of a Deep–Bedded Karst Tunnel Construction with Cavity Located Ahead of Tunnel Working Face

Wu,

Sun,

Meng

2024

Buildings

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For the purpose of reliability quantitative assessment of the surrounding rock of the deeply embedded karst tunnel and the geological body around the cavern in the case of the cavern in the forepart of the tunnel face, on the basis of the upper bound limit analysis method, the energy dissipation theory, as well as the reliability theory, the dimensionless performance function of each damage area of the deeply buried karst tunnels could be established in the case of the cavern in the front of the tunnel face. Subsequently, the probability of failure and the reliability index of each damage region of the deep–bedded karst tunnel in the case of the cavern in the front of this tunnel face should be calculated through the Monte Carlo simulation sampling approach. The investigation has demonstrated that the larger the cohesion of the geotechnical body and the larger the internal friction angle within the geotechnical body, the larger the reliability indexes of the geotechnical bodies around the tunnel. The larger the diameter of the cavern and the larger the tunnel burial depth, the greater the probability of failure in the left part of the geotechnical body around this cavern, and the smaller the reliability indexes of these damage areas.

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Section: Introductionmentioning

confidence: 99%

A Calculation Method for Reliability Index of a Deep–Bedded Karst Tunnel Construction with Cavity Located Ahead of Tunnel Working Face

Wu,

Sun,

Meng

2024

Buildings

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Large-Scale Model Test on Water Pressure Resistance of Lining Structure of Water-Rich Tunnel

Huang

Yang

2023

Materials

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In order to solve the problem of testing the water pressure resistance of lining structures of water-rich tunnels and the difficulty of implementing the existing model tests, a large-scale model test method was proposed relying on the New Yuanliangshan Tunnel threatened by high pressure and rich water. This method creatively transformed the external water pressure of the lining structure into internal water pressure, and the conversion coefficient of water resistance of lining under different sizes and loading modes was obtained by numerical calculation. Results showed that the ultimate water pressure resistance of the lining structure under an external uniformly distributed water pressure and local water pressure was 1.44 and 0.67 times of that obtained from the large-scale model tests, respectively. By conducting the large-scale model tests and combining with the conversion coefficient, the water pressure resistance of the actual tunnel lining could be obtained. Research indicated that water pressure resistance of K2.0 (bearing water pressure of 2.0 MPa) type lining at the transition section of karst caves and K3.0 (bearing water pressure of 3.0 MPa) type lining at the section of karst caves of the New Yuanliangshan Tunnel was 3.33 MPa and not less than 4.36 MPa, respectively, and the high reliability of the large-scale model tests was verified by numerical calculation, implying that the model test method could be extended to similar tunnel projects.

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Analysis and Application of Lining Resistance to Water Pressure in Tunnel through Karst Cave

Cited by 2 publications

References 17 publications

A Calculation Method for Reliability Index of a Deep–Bedded Karst Tunnel Construction with Cavity Located Ahead of Tunnel Working Face

A Calculation Method for Reliability Index of a Deep–Bedded Karst Tunnel Construction with Cavity Located Ahead of Tunnel Working Face

Large-Scale Model Test on Water Pressure Resistance of Lining Structure of Water-Rich Tunnel

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