Terms & Conditions

Data Security

We are committed to ensuring that your information is secure. In order to prevent unauthorised access or disclosure we have put in place suitable physical, electronic and managerial procedures to safeguard and secure the information we collect.

All data is stored in secure electronic systems accessible only to Oasys staff with both valid network login credentials and specific authorisation to access the system.  Our systems further limit data access by role to ensure data is available only to those who have a specific need to see it.

If at any point you suspect or receive a suspicious communication from someone suggesting they work for Oasys or a website claiming to be affiliated with Oasys, please forward the communication to us or report the incident by email to [email protected] or in writing to Oasys, 8 Fitzroy Street, London, UK, W1T 4BJ as soon as possible.

Data Security Notice Updated 27th February 2020

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Website Terms and Conditions

The contents of this web site are protected by copyright and other intellectual property rights under international conventions. No copying of any words, images, graphic representations or other information contained in this web site is permitted without the prior written permission of the webmaster for this site.

Oasys accepts no responsibility for the content of any external site that links to or from this site.

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Software Licensing Terms

Terms and Conditions of Purchase

The full conditions of purchase and maintenance for all Oasys desktop software are set out in the Oasys Software Licence and Support Agreement.

The full conditions of purchase and maintenance for Oasys Gofer and Oasys Giraphe are set out in the Gofer SaaS Agreement  and the Giraphe SaaS agreement.

All prices are subject to TAX at the current rate.

Prices and specifications are subject to change without notice – please ask for a written quotation.

Although every care has been taken to ensure the accuracy of all information contained herein, the contents do not form or constitute a representation, warranty, or part of any contract.

Superseded Versions of Terms and Conditions

Oasys keeps copies of all superseded versions of its terms and conditions.

Maintenance & Support Services

Support and maintenance is included with all subscription licences for their full duration.

Annual maintenance contracts are available for software under a perpetual licence, prices are based on a percentage of the most recent list price.

This service includes:


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Cookies Policies

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Settlement calculation and utility impact assessment

Software Used on this Project

Project Overview

The Arup design team assessed the impact on utilities due to ground movements from a major infrastructure project. Their innovative solution showed the synergy that can be created by combining Oasys Xdisp and Pdisp for a comprehensive analysis of major projects.

A semi-automatic process was achieved using Feature Manipulation Engine (FME) software by Safe to save processing time. This automatic procedure reduced human error when dealing with a large number of assets. This also provided a tool to simplify iterative analysis – saving time and money.

How Oasys proved invaluable

The stakeholders for this project included the various utilities providers, each with unique criteria and a variety of asset dimensions to be assessed. Ground movements generated by three phases of works (demolition of buildings, installation of temporary and permanent retaining walls, excavation behind the walls and for tunnelling) were calculated using a combination of Oasys Pdisp and Xdisp. Displacements were calculated for each phase and imported into the analysis for the subsequent phase, for the utility assessment to be undertaken.

Xdisp excavation detail model

More than 600 assets were identified to be within the zone of influence of the works and potentially at risk of being impacted. Asset information provided in Geographic Information System (GIS) format included the position of the asset (geo-referenced), type of asset (jointed or continuous), dimension and type of material in order to identify the limiting criteria to be applied. Using Safe’s FME software, potential failure modes were identified and the data was processed to obtain compatible inputs for Oasys Pdisp and Xdisp.

Pdisp Model

The results of each phase were post-processed and different graphs along the asset chainage were produced to show axial and flexural strains, combined tensile and compressive strains, and the displacements along and perpendicular to the line of the utility. The results were mapped back into the GIS files in order to generate drawings to depict the results of the assessment.

Settlement Results in Xdisp

The Oasys Xdisp model of the proposed works included polygonal and circular excavations with several ground movement curves (installation and excavation effects) and tunnels with varying volume losses. The Xdisp models were used in combination with the Oasys Pdisp soil displacement model (for the demolition stage of the project) to calculate displacements for the lines originally provided in GIS.

Extensive displacement grids were also used in Pdisp and Xdisp to obtain vertical ground movement contours for each of the phases.

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