Solutions: Tunnelling & Underground Structures

DIANA can be utilised in a number of ways in tunnel projects. Analyses normally focus on tunnel induced settlement or lining stress analysis, but DIANA can also be used to research how a tunnel may react in the event of a fire, explosion or even a seismic event.

Now, with increasing congestion in modern cities we are turning even more to underground transportation systems, finding ourselves not only tunnelling under existing structures, but often also under existing tunnels. Ground movement is an inevitable risk to nearby structures which must be carefully assessed, both at the planning stage and as the project unfolds. This, in addition to the potential negative effect on the safety of construction and the project cost, means that the ability to make these predictions accurately is a key. Surface settlement caused by shallow tunnel construction in Greenfield sites can be predicted with some confidence. However, surface settlement in urban areas presents a much more complex interaction between the tunnel and its shafts, the ground and the building.

Using the DIANA software you are able to create detailed 2D and 3D analyses of the interaction between the building, the ground and the tunnel and its shafts. The analysis of existing and new build tunnel linings under the effect of events caused by structural damage, freezing, fire, flood, or earthquake are critical to the safety and longevity of the tunnel. With DIANA, a model of the tunnel segments and joints, along with the soil and grout pressures upon it; and potential factors listed above can be analysed to show intrinsic possible deformations.

In addition to the tunnel specific technical data and specifications below, see also the general technical information.  Our range of brochures are also available for download.  Or, if you have a specific question about DIANA that you would like to ask, please use the webform.

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