Browsing by Subject "multiple tunnels"

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Access status: Open Access ,
Stress state of multiple tunnel linings constructed in urban areas with the application of grouting
(2007) Fotieva, Nina; Bulyčev, Nikolaj; Anciferov, Sergej; Sammal, Andrey; Deev, Petr
A method for the design of multiple circular tunnel linings constructed in built-up areas with the application of soil grouting developed at Tula State University is described in the paper presented. The method allows the stress state and bearing capacity of linings to be evaluated under the actions of the soil own weight and the weight of buildings or structures both existing on the surface before the tunnels driving and erected nearly to the already exploited tunnels. The method is based on analytical solutions of corresponding plane problems of elasticity theory and is added by a special technique for approximate taking the 3D character of surface loads into account, caused by limited sizes of buildings in the direction along the tunnel axes and by spatial locations of several buildings in this direction. This approximate approach as well as a possibility of applying the linear solutions for tunnel linings calculations has been validated by comparison of the results obtained with the data from physical and 3D nonlinear numerical modelling. The corresponding software has been developed. Examples of the design are given.