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Stability of rectangular tunnel in cohesionless soils
Stability of rectangular tunnel in cohesionless soils has been investigated by using lower-bound finite-element limit analysis with second-order conic programming (SOCP). The rectangular tunnel of width B and height D is placed at a depth of H from the ground surface. A uniform compressive pressure is applied at the tunnel periphery with the help of a lining or anchorage system to support it. The lining pressure (σt) is optimized subjected to a set of equality and inequality constraints by using the SOCP optimization technique. The variation of normalized compressive pressure (σt/γD) is presented for combinations of B/D, H/D and ϕ where ϕ is the internal friction angle for both smooth and rough tunnel surface.
Stability of rectangular tunnel in cohesionless soils
Stability of rectangular tunnel in cohesionless soils has been investigated by using lower-bound finite-element limit analysis with second-order conic programming (SOCP). The rectangular tunnel of width B and height D is placed at a depth of H from the ground surface. A uniform compressive pressure is applied at the tunnel periphery with the help of a lining or anchorage system to support it. The lining pressure (σt) is optimized subjected to a set of equality and inequality constraints by using the SOCP optimization technique. The variation of normalized compressive pressure (σt/γD) is presented for combinations of B/D, H/D and ϕ where ϕ is the internal friction angle for both smooth and rough tunnel surface.
Stability of rectangular tunnel in cohesionless soils
Dutta, Puja (author) / Bhattacharya, Paramita (author)
International Journal of Geotechnical Engineering ; 15 ; 1345-1351
2021-11-26
7 pages
Article (Journal)
Electronic Resource
English
Tunnels , stability , plasticity , limit analysis , SOCP , optimization
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