Continuous field based upper bound analysis for three-dimensional tunnel face stability in undrained clay

This paper analyzes the load transfer characteristics of pipe roof over the excavating face, and the analytical solution of tunnel face stability is established by the method of three-dimensional analysis. Through the calculation of the load transfer of the pipe roof, it indicates that the released load of excavation is passed to the supporting structure and soil which is not excavated by the effect of the pipe roof, and the magnitude of load and coverage of impact are in connection with excavating footage as well as subgrade reaction. The three-dimensional analytical solution of tunnel face stability is used to analyze a project case of Airport Road underpass in Hangzhou. The results show that the tunnel face stability is not guaranteed when excavated on a large section while the stability is enhanced when excavated on separated pilot headings.

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Three-dimensional upper-bound analysis of rock slopes subjected to seepage forces based on Hoek-Brown failure criterion

Computers and Geotechnics ◽

10.1016/j.compgeo.2021.104310 ◽

2021 ◽

Vol 138 ◽

pp. 104310

Author(s):

Su-Tang Wang ◽

Xiao-Li Yang ◽

Fu Huang ◽

Qiu-Jing Pan

Keyword(s):

Upper Bound ◽

Failure Criterion ◽

Three Dimensional ◽

Rock Slopes ◽

Upper Bound Analysis ◽

Bound Analysis

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Three-dimensional analysis of tunnel face stability in spatially variable soils

Computers and Geotechnics ◽

10.1016/j.compgeo.2019.03.005 ◽

2019 ◽

Vol 111 ◽

pp. 76-88 ◽

Cited By ~ 7

Author(s):

Hongzhan Cheng ◽

Jian Chen ◽

Renpeng Chen ◽

Juehao Huang ◽

Jianhe Li

Keyword(s):

Dimensional Analysis ◽

Three Dimensional ◽

Tunnel Face ◽

Face Stability ◽

Tunnel Face Stability

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Upper-bound analysis on the face stability of a non-circular tunnel

Tunnelling and Underground Space Technology ◽

10.1016/j.tust.2016.11.010 ◽

2017 ◽

Vol 62 ◽

pp. 96-102 ◽

Cited By ~ 70

Author(s):

Qiujing Pan ◽

Daniel Dias

Keyword(s):

Upper Bound ◽

Circular Tunnel ◽

Face Stability ◽

Upper Bound Analysis ◽

The Face ◽

Bound Analysis

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Upper bound of tunnel face stability using asymmetric yielding

Underground Space ◽

10.1016/j.undsp.2018.03.001 ◽

2018 ◽

Vol 3 (4) ◽

pp. 288-296

Author(s):

Itai Elkayam ◽

Assaf Klar

Keyword(s):

Upper Bound ◽

Tunnel Face ◽

Face Stability ◽

Tunnel Face Stability

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Probabilistic Analysis of Tunnel Face Stability below River Using Bayesian Framework

Mathematical Problems in Engineering ◽

10.1155/2018/1450683 ◽

2018 ◽

Vol 2018 ◽

pp. 1-8 ◽

Cited By ~ 2

Author(s):

Weiping Liu ◽

Xiaoyan Luo ◽

Jinsong Huang ◽

Lina Hu ◽

Mingfu Fu

Keyword(s):

Probabilistic Analysis ◽

Three Dimensional ◽

Friction Angle ◽

Bayesian Framework ◽

Computational Time ◽

Support Pressure ◽

Tunnel Face ◽

Face Stability ◽

Mcmc Simulation ◽

Tunnel Face Stability

A key issue in assessment on tunnel face stability is a reliable evaluation of required support pressure on the tunnel face and its variations during tunnel excavation. In this paper, a Bayesian framework involving Markov Chain Monte Carlo (MCMC) simulation is implemented to estimate the uncertainties of limit support pressure. The probabilistic analysis for the three-dimensional face stability of tunnel below river is presented. The friction angle and cohesion are considered as random variables. The uncertainties of friction angle and cohesion and their effects on tunnel face stability prediction are evaluated using the Bayesian method. The three-dimensional model of tunnel face stability below river is based on the limit equilibrium theory and is adopted for the probabilistic analysis. The results show that the posterior uncertainty bounds of friction angle and cohesion are much narrower than the prior ones, implying that the reduction of uncertainty in cohesion and friction significantly reduces the uncertainty of limit support pressure. The uncertainty encompassed in strength parameters are greatly reduced by the MCMC simulation. By conducting uncertainty analysis, MCMC simulation exhibits powerful capability for improving the reliability and accuracy of computational time and calculations.

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