Analytical analysis of working face passive stability during shield tunneling in frictional soils
Sign Up to like & getrecommendations! Published in 2018 at "Acta Geotechnica"
DOI: 10.1007/s11440-018-0753-3
Abstract: This paper develops the 2D and 3D kinematically admissible mechanisms for analyzing the passive face stability during shield tunneling using upper-bound analysis. The mechanisms consider trapezoidal distribution of support pressure along tunnel face and partial… read more here.
Keywords: support pressure; shield tunneling; face; stability shield ... See more keywords
Discrete element modeling of static liquefaction of shield tunnel face in saturated sand
Sign Up to like & getrecommendations! Published in 2019 at "Acta Geotechnica"
DOI: 10.1007/s11440-019-00806-w
Abstract: The failure mechanism and limit support pressure are essential factors for the stability assessment of tunnel face during shield tunneling. Previous studies were mostly based on the assumption that soil fails when the plastic limit… read more here.
Keywords: static liquefaction; tunnel face; saturated sand; face saturated ... See more keywords
3D Rotational Failure Mechanism of Tunnel Face in Weathered and Saturated Hoek-Brown Rock Masses
Sign Up to like & getrecommendations! Published in 2019 at "KSCE Journal of Civil Engineering"
DOI: 10.1007/s12205-019-1048-4
Abstract: This paper aims to assess the face stability for tunnels excavated in weathered and saturated rock masses using the Hoek-Brown failure criterion. With resort to the upper bound theorem of limit analysis, a 3D rotational… read more here.
Keywords: face; tunnel face; failure; weathered saturated ... See more keywords
Analysis of the effect of groundwater on soil arch in shield tunneling
Sign Up to like & getrecommendations! Published in 2018 at "Arabian Journal of Geosciences"
DOI: 10.1007/s12517-018-3829-3
Abstract: The soil arch above tunnel face should be considered in the calculation of the minimum support pressure on tunnel face. It is not clear that the effect of water on the soil arch at present.… read more here.
Keywords: soil; groundwater; soil arch; tunnel face ... See more keywords
Safety factor analysis of a tunnel face with an unsupported span in cohesive-frictional soils
Sign Up to like & getrecommendations! Published in 2020 at "Computers and Geotechnics"
DOI: 10.1016/j.compgeo.2019.103221
Abstract: Abstract Ensuring the stability of the tunnel face and the unsupported span is a critical issue in conventional tunnelling. An improved prism-wedge model is established to reasonably evaluate the safety factor of a tunnel face… read more here.
Keywords: tunnel; safety factor; unsupported span; face unsupported ... See more keywords
Influence of seepage and tunnel face opening on face support pressure of EPB shield
Sign Up to like & getrecommendations! Published in 2021 at "Computers and Geotechnics"
DOI: 10.1016/j.compgeo.2021.104198
Abstract: Abstract The hydraulic head on the tunnel face is smaller than that in the far-field ground when the earth pressure balance shield excavates in a saturated stratum. The seepage force could thus drag the soil… read more here.
Keywords: seepage; tunnel face; support pressure; face ... See more keywords
An efficient probabilistic design approach for tunnel face stability by inverse reliability analysis
Sign Up to like & getrecommendations! Published in 2021 at "Geoscience frontiers"
DOI: 10.1016/j.gsf.2021.101210
Abstract: Abstract In order to maintain the safety of underground constructions that significantly involves geo-material uncertainties, this paper delivers a new framework for conducting reliability-based design (RBD) of shallow tunnel face stability, utilizing a simplified inverse… read more here.
Keywords: face; tunnel face; design; face stability ... See more keywords
Stability analysis of a non-circular tunnel face in soils characterized by modified Mohr-Coulomb yield criterion
Sign Up to like & getrecommendations! Published in 2021 at "Tunnelling and Underground Space Technology"
DOI: 10.1016/j.tust.2020.103785
Abstract: Abstract In many studies, the face stability evaluations of underground excavations have been performed with an equal-area circular tunnel face instead of the real tunnel shape. This equivalent method greatly facilitates the model construction, but… read more here.
Keywords: non circular; stability; tunnel; tunnel face ... See more keywords
Stability Analysis of the Pressurized 3D Tunnel Face in Anisotropic and Nonhomogeneous Soils
Sign Up to like & getrecommendations! Published in 2020 at "International Journal of Geomechanics"
DOI: 10.1061/(asce)gm.1943-5622.0001635
Abstract: AbstractThis paper investigates the effect of the anisotropy and nonhomogeneity of soil on the three-dimensional stability of a pressurized tunnel face. A three-dimensional horn failure mechanism w... read more here.
Keywords: pressurized tunnel; stability analysis; analysis pressurized; tunnel face ... See more keywords
Stability Analysis of Pressurized 3D Tunnel Face with Tensile Strength Cutoff
Sign Up to like & getrecommendations! Published in 2021 at "International Journal of Geomechanics"
DOI: 10.1061/(asce)gm.1943-5622.0002190
Abstract: Abstract The aim of this study is to propose an effective approach to evaluate the stability of a shield tunnel face with tensile strength cutoff by using the upper-bound limit analysis method. Bas... read more here.
Keywords: tensile strength; face tensile; tunnel face; stability ... See more keywords
Probabilistic Analysis of Tunnel Face Stability below River Using Bayesian Framework
Sign Up to like & getrecommendations! Published in 2018 at "Mathematical Problems in Engineering"
DOI: 10.1155/2018/1450683
Abstract: 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… read more here.
Keywords: tunnel face; face; face stability; analysis ... See more keywords