Investigation of steady water inflow into a subsea grouted tunnel

Li, Peng Fei; Wang, Fan; Long, Yingying; Zhao, Xu

doi:10.1016/j.tust.2018.06.003

Cited by 84 publications

(29 citation statements)

References 24 publications

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“…Taking the F4 weathered slot of the Xiamen Xiang'an subsea tunnel in China as an example, the calculating parameters are shown in Table 1. According to the research results by Li et al [14], the lateral boundary should be at least nine times the tunnel diameter when analyzing seepage field by numerical simulation. Figure 4 shows comparisons of pore pressure distribution between analytical solutions and numerical solutions.…”

Section: Numerical Modelmentioning

confidence: 99%

“…Using the axisymmetric modeling method, Wang et al [13] conducted a theoretical and experimental study to analyze the influence of controlled drainage on the external water pressure of lining for deep tunnels. In addition, Li et al [14] investigated analytical solutions for steady water inflow into a subsea grouted tunnel using the complex variable method, mirror image method, and axisymmetric modeling method. However, all the research mentioned above focused on single underwater tunnels.…”

Section: Introductionmentioning

confidence: 99%

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An Analytical Model of Seepage Field for Symmetrical Underwater Tunnels

Wang

2018

Symmetry

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Based on the mirror image method and superposition principle, an analytical model of seepage field for symmetrical underwater tunnels is proposed. The condition is assumed as two-dimensional steady water inflow into symmetrical and horizontal underwater tunnels in a fully saturated, homogeneous, isotropic, and semi-infinite aquifer. Analytical solutions of pore water distribution and water inflow into tunnels are obtained. Two different boundary conditions at the perimeter of symmetrical tunnels are considered, constant total hydraulic head and constant water pressure. Taking the subsea tunnels of Xiamen Xiang'an in China as an example, comparisons between analytical solutions and numerical solutions are analyzed in the case of zero water pressure at the perimeter of symmetrical tunnels. The results show that the analytical solutions for pore pressure distribution and water inflow match well with the numerical solutions and that the relative deviations are all in an acceptable range. The solutions derived from the analytical model in this paper can analyze the steady seepage field of symmetrical underwater tunnels accurately and reasonably.

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Section: Numerical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An Analytical Model of Seepage Field for Symmetrical Underwater Tunnels

Wang

2018

Symmetry

Self Cite

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“…In fact, the attention on estimating the analytical expression for the pore water pressure around a tunnel is growing, and many important works have been published [33][34][35]. e widespread approximative solution is ascribed to Goodman [36], which is based upon an approximative approach by Polubarinova-Kochina [37].…”

Section: Introductionmentioning

confidence: 99%

Limit Analysis of Collapse Mechanisms for Tunnel Roofs Subjected to Pore Water Pressure: A Numerical Approach

Liu

Chen

Xie³

et al. 2021

Advances in Civil Engineering

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The collapse mechanism of a circular unlined tunnel roof subjected to the pore water pressure under plane strain conditions is investigated in this article. First, the model of calculating the function expression of the detaching surface for the collapsing block is formed in the framework of the upper bound theorem of limit analysis and the extremum principle. The analytical solution of the pore water pressure around the tunnel in a two-dimensional steady seepage field is employed in the equations of the model. Then, the numerical approach based on the Runge–Kutta algorithm and traversal search method is proposed to solve the complex equations. The obtained expression of the detaching surface for the collapsing block provides the shape of the collapsing block and a theoretical basis for designing the support force for tunnels. The proposed limit analysis method and numerical approach are verified by comparing with existing theoretical solutions and the numerical simulation result, and they are suitable for deep, shallow tunnels and layered strata. Moreover, the effects of different parameters on the collapse mechanism are investigated, and qualitative results are provided.

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“…This material can better simulate the state of rock eroded by water flow. Many factors including porous media seepage (Zhang et al 2020) and pore water pressure distribution (Li et al 2018b) have been considered by scholars.…”

Section: Introductionmentioning

confidence: 99%

Study on the seepage characteristics of deep buried tunnels under variable high-pressure water heads

Wang

Jing

et al. 2020

Bull Eng Geol Environ

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Well-connected seepage channels are the key components of tunnel water inrush. To study the trends of the pore water pressure in the rock mass in a seepage channel, the physical experiment and corresponding numerical model were established. First, in the seepage experiment under excavation disturbance, the propagation rate of the high-pressure water source and the growth rate of the pore water pressure in the rock mass were analyzed by considering the different water pressures. Second, under the same model size, parameters, and working conditions, the finite element method was used to simulate the seepage process of water in the rock mass. From the microlevel, the evolution process of the pore water pressure isosurface was obtained. The results showed that the pressure water head is positively correlated with the pore water pressure in the rock mass, which displays multiple approximate relationships. Moreover, when the water pressure is high, excavation disturbance can significantly increase the pore water pressure in the rock mass. The disturbance caused by the first excavation is larger than the subsequent excavations. In addition, the research results were compared with previous results. Reasonable agreements that would provide a reference for the conditions of high water-pressure disasters in deep buried tunnel construction were obtained.

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Investigation of steady water inflow into a subsea grouted tunnel

Cited by 84 publications

References 24 publications

An Analytical Model of Seepage Field for Symmetrical Underwater Tunnels

An Analytical Model of Seepage Field for Symmetrical Underwater Tunnels

Limit Analysis of Collapse Mechanisms for Tunnel Roofs Subjected to Pore Water Pressure: A Numerical Approach

Study on the seepage characteristics of deep buried tunnels under variable high-pressure water heads

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