The Influence of Hydraulic Conditions on the Stability of Dual Circular Tunnels in Unsaturated Soils | Zendy

Jingna Du | Zendy; Fei Ye | Zendy

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The Influence of Hydraulic Conditions on the Stability of Dual Circular Tunnels in Unsaturated Soils

Author(s) -

Jingna Du,

Fei Ye

Publication year - 2021

Publication title -

mathematical problems in engineering

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.262

H-Index - 62

eISSN - 1026-7077

pISSN - 1024-123X

DOI - 10.1155/2021/8503490

Subject(s) - soil water , geotechnical engineering , water table , infiltration (hvac) , water pressure , dual (grammatical number) , limit analysis , geology , dual purpose , groundwater , upper and lower bounds , engineering , materials science , soil science , mathematics , composite material , mechanical engineering , art , literature , mathematical analysis

The performance of geotechnical structures in unsaturated soils is affected significantly by the hydraulic conditions. In the present paper, a unified computational upper bound limit analysis method is applied to study the stability of dual circular tunnels located in unsaturated soils. The linings are substituted by an equivalent uniform pressure exerted on the periphery of the tunnel. The main focus is put on the effect of ground water table and surface water infiltration on the required supporting pressure and collapse mechanisms of dual tunnels. The critical center-to-center spacing above which the interaction of the tunnels disappears is also discussed.

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