Xdisp (formerly Tunset)

Xdisp is the new name for Tunset - the Oasys program which predicts ground movements due to all kinds of excavations, including tunnels, basements, mines and embedded walls.

Xdisp analyses ground movements in terms of three-dimensional displacements and horizontal strains. Xdisp then uses this information to calculate building damage assessments.

Xdisp has been used by engineers working on complex urban tunnelling projects in London, New York and Hong Kong and major projects such as Cross Rail in London.

Tunnels and Mines

Tunnels can be modelled as cylindrical excavations in soil. Xdisp defines the settlement profile at the surface or specified depth based on estimated volume loss above the tunnel due to deformation.

Mines are taken as excavations of rectangular cross-section in rock. Xdisp uses and analysis based on the stochastic influence approach to predict subsidence and horizontal displacement.

Embedded Wall Excavations

Embedded wall excavations are modelled in plan as polygons with a level at each corner. Each is assigned horizontal and vertical surface movement curves that are used to calculate soil settlements and horizontal ground displacements. You can use this option for the construction of retaining walls and for excavation in front of the retaining walls to form restrained cuts or basements.

Building Damage Assessment

Building Damage Assessment is calculated using the Burland (1997) assessment method. Buildings are specified by their locations and bending properties. Xdisp uses the analysis data to class the buildings into damage categories based on their tensile strains.

3D Graphics

Xdisp provides 3D graphics of complex geometries of components and results, enhancing your clients understanding of a project, providing immediate visual identification of data input errors and aiding the engineer in the interpretation of results.

Improved Sub-surface Movements

The new release of Xdisp 19.0 gives you better results at the edge of your excavations. You can now enter field data to create a curve that gives more accurate displacements at depths and distances from the wall of the excavation.

Program Features

Xdisp allows you to:

• Input single or dual layered soils
• Analyse inclined or horizontal soil interfaces
• View results in plan, as contours or vectors
• Enter field data to give improved sub-surface ground movements
• Get surface and sub-surface results
• Examine excavations with inclined bases
• Analyse models with multiple mines, or multiple excavations, tunnels and buildings
• Produce line graphs of settlements and horizontal displacements
• Assess building damage resulting from soil movements and produce Building Damage Interaction charts
• Display results as 3D graphics

You can purchase Xdisp as part of a Geotechnical software bundle. Contact us for more details.