The effect of pore water pressure on tunnel face stability

Pan, Qiujing; Dias, Daniel

doi:10.1002/nag.2528

Cited by 143 publications

(29 citation statements)

References 25 publications

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“…e di erences of the UB solutions between this study and Mollon et al [37] decrease with the increasing friction angle. Pan and Dias [32] employed the rotational failure mechanism of Mollon et al [37] to obtain the support pressure of tunnel face subjected to pore water pressure. e approximate method based on the PWP coe cient was also used to calculate the upper bounds.…”

Section: Comparisons With the Existing Resultsmentioning

confidence: 99%

“…It should be noted that the PWP coe cient cannot be determined in practice and can only be used for approximate estimation. As presented by Pan and Dias [32], the numerical FE/FD analyses can be conducted to obtain the PWP distribution during the excavation and then incorporating it into the UB solutions could yield an accurate result.…”

Section: Comparisons With the Existing Resultsmentioning

confidence: 99%

“…e presented comparisons demonstrate that the presented mechanism can yield better upper bounds to the support pressure in the LA. e rotational mechanism has been further used for many other problems [31][32][33][34][35], such as nonhomogeneous soils, pore water pressures, reinforcement, noncircular tunnel faces, probabilistic evaluation, and rock tunnels.…”

Section: Introductionmentioning

confidence: 99%

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Rotational Failure Mechanism for Face Stability of Circular Shield Tunnels in Frictional Soils

Zhou

Zhu

Wang

et al. 2019

Advances in Civil Engineering

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Face stability analyses of shield-driven tunnels are often carried out to determine the required support pressure on the tunnel face. Although various three-dimensional mechanisms have been proposed for circular faces of tunnels in frictional and/or cohesive soils to obtain the limit support pressure, the most critical one has not yet been found. Based on a rotational failure mechanism for the frictional soils, this paper modifies the circular cross section as an ellipse to make the generating collapse surface inscribe the entire circular tunnel face. Using the kinematical approach of limit analysis yields an upper bound to the limit support pressure. Through comparisons with the existing results in the literature, the improved mechanism can better estimate the upper bound and is very similar to the observed failures in the experimental tests. The influences of the pore water pressure are also included in the stability analysis of tunnel faces. Calculated upper-bound solutions are presented in a condensed form of charts for convenient use in practice.

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Section: Comparisons With the Existing Resultsmentioning

confidence: 99%

Section: Comparisons With the Existing Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Rotational Failure Mechanism for Face Stability of Circular Shield Tunnels in Frictional Soils

Zhou

Zhu

Wang

et al. 2019

Advances in Civil Engineering

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“…There exist publications of the analytical continuous upper bound limit analysis method for shield tunnel stability problems, such as Osman et al [1][2], Klar et al [3], Mollon et al [4], Klar and Klein [5], Xiang and Song [6], Zhang et al [7], Huang et al [8], Song and Xiang [9], Xiang and Song [10], however, none of them and other analytical continuous upper bound limit analysis developments in the existent literature has taken into consideration of groundwater seepage effect. In contrast, the limit equilibrium method and the rigid body upper bound limit analysis method have been widely developed with pore water effect, such as Anagnostou and Kovári [11], Lee et al [12], Anagnostou [13], and Perazzelli [14], for the former, and Lee et al [15], Park et al [16], Huang et al [17][18][19], Xie et al [20], Pan and Dias [21], Liu et al [22], and Sun et al [23], for the latter.…”

Section: Introductionmentioning

confidence: 99%

An Analytical Continuous Upper Bound Limit Analysis of Pore Water Effect on the Tail Stability of Underwater Shield Tunnels during Construction

Song

Xiang

2020

E3S Web Conf.

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An analytical continuous upper bound limit analysis is developed to analyse the effects of seepage on the transverse stability of underwater shield tunnels. The approach is based on an analytical continuous upper bound limit analysis method for cohesive-frictional soils. It employs the complex variables solution of the displacement field due to tunnel deformation and movement, and the analytical solution of the pore water pressure field for steady state seepage due to pore water influx at the tunnel perimeter. The most critical slip line position and the minimum required tunnel support pressure are determined by using a particle swarm optimization scheme for various generic situations. The method is verified via finite element simulation and comparison with the solution from using rigid block upper bound limit analysis. The parametric analysis revealed among other things that both the infimum of the necessary tunnel support pressure and the most critical plastic zone increase when the hydraulic head at the ground surface increases, but decrease when the tunnel influx increases due to the fact that pore water pressure at the tunnel perimeter decreases with the tunnel influx.

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“…us, its calculation process is simple and has been regarded as one of the most effective approaches to solve the surrounding rock pressure problem in the deep cavity [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Upper Bound Solution of Surrounding Rock Pressure for Deep Cavity Using Nonlinear Hoek–Brown Failure Criterion

Wang

Liu

2018

Advances in Civil Engineering

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The linear failure criterion is generally adopted in the stability problem of geotechnical engineering, whereas the experiments have indicated that there is a nonlinear relationship between the maximum and minimum principal stresses in weak surrounding rock. According to the characteristics of weak rock, the failure mechanism of deep cavity is constructed by combining the nonlinear Hoek–Brown failure criterion and the upper bound theorem of limit analysis. The upper bound solution of the surrounding rock pressure was deduced using the tangent method. The results show that the surrounding rock pressure of deep cavity is affected by surrounding rock grade, cavity depth, and section size. Especially, the influence of the disturbance factor is quite obvious. Upper bound solution based on nonlinear Hoek–Brown failure criterion can fully take the influence of parameters on surrounding rock pressure. Therefore, this method is more scientific than the linear failure criterion to calculate the surrounding rock pressure.

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The effect of pore water pressure on tunnel face stability

Cited by 143 publications

References 25 publications

Rotational Failure Mechanism for Face Stability of Circular Shield Tunnels in Frictional Soils

Rotational Failure Mechanism for Face Stability of Circular Shield Tunnels in Frictional Soils

An Analytical Continuous Upper Bound Limit Analysis of Pore Water Effect on the Tail Stability of Underwater Shield Tunnels during Construction

Upper Bound Solution of Surrounding Rock Pressure for Deep Cavity Using Nonlinear Hoek–Brown Failure Criterion

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