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Behaviour of buildings due to tunnel induced subsidence

Behaviour of buildings due to Tunnel Induced subsidence

In urban areas tunnelling can induce ground movements which distort and, in severe

cases, damage overlying buildings and services. The conventional design methods, used in

engineering practice to assess these deformations, are based on empiricism gained from green

field sites and consequently do not account for important characteristics of these structures.

Furthermore the mechanisms which control this tunnel-soil-structure interaction problem are

not well understood.

Recently, a new approach, based on the relative stiffness of a building and the underlying

soil, has been proposed to account for the effect of a building stiffness when predicting its

deformation and potential damage. The objective of this thesis is to assess this new approach

and extend its applicability. This has been achieved by performing parametric studies using

both two and three dimensional finite element analyses and by reviewing field data obtained

during the construction of the Jubilee Line Extension. In particular the effect of building

weight, the nature of the contact between the building foundations and the soil and the

geometry of the building with respect to the direction of tunnelling on the behaviour of the

building has been investigated.

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Behaviour of buildings due to tunnel induced subsidence


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