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Data Security

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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 oasys@arup.com or in writing to Oasys, 13 Fitzroy Street, London, UK, W1T 4BQ 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 software are set out in the Oasys Software Licence and Support 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Superseded Versions of Terms and Conditions

Oasys keeps copies of all superseded versions of its terms and conditions.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

  • telephone/fax/email/web based support
  • free software updates available via internet download
  • personalised output header for many products

UCH Macmillan Cancer Centre

Software Used on this Project

Project Overview

UCLH aims to provide a patient-focused therapeutic environment for cancer patients, their families and carers, using best-practice models from around the world. The building contains accommodation for general cancer care, private patient cancer care and clinical facilities as well office accommodation.

The development is in the London Borough of Camden, bounded by Mortimer Market to the west, University Street to the north, Huntley Street to the east, and adjacent to an existing building, The Rayne Institute to the North West.

This case study presents the process of retaining wall and pile design adjacent to the Rayne Institute piles.

How Oasys proved invaluable

Geotechnical Constraints

For the basement construction, the section of retaining wall running alongside the Rayne Institute had several architecturally imposed restrictions which required a different approach to the rest of the retaining wall.

Due to requirements to locate a service lift at this edge of the building there were tight space restrictions that impacted the wall thickness and the wall offset from the adjacent Rayne Institute.

Overview of the Geotechnical Solution near the Rayne Institute

Arup proposed the construction of a 600mm diameter hard-soft bored secant pile wall with male piles at 750mm diameter centres and with a structural skin wall to provide long term water tightness. In addition, the reinforcement requirements for this section of wall needed to be assessed in light of the small pile diameter.

The smaller pile diameter of 600mm in this area required the wall to be temporarily propped at two levels, where a steel waling beam with associated propping was adopted for the intermediate level. To avoid undermining the basement of the adjacent Rayne institute building it was proposed that the capping beam over this section of wall be raised above the new lower ground floor basement level (forming an upstand in the final condition).

The effect on the Rayne Institute piles needed to be carefully analysed and movements due to excavation of the adjacent basement needed to be carefully controlled.  This was further complicated by the fact that the Rayne Institute piles were not fully reinforced over their length.

Analysis

The impact of the movements on the Rayne Institute piles due to excavation in front of the secant pile wall were assessed in an iterative manner using Oasys Frew, Alp, Pilset (now incorporated into Pile 19.1) and AdSec.

A summary of this calculation is shown below:

Oasys Frew was used to calculate the horizontal ground movements caused by the construction sequence of the UCLH retaining wall.

The horizontal ground movements from Oasys Frew at different construction stages were applied to Oasys Alp to assess the bending moments induced in the 600mm piles.

The bending moments from Oasys Alp were used to check the capacity of the reinforced and unreinforced sections of the piles in Oasys AdSec. In turn the Stiffnesses (EI values) from AdSec were fed back to Alp in an iterative process.

For the unreinforced piles, axial compression caused by axial loading needed to be considered to allow the bending moment capacity to be assessed. The axial loading that was applied in Oasys AdSec was calculated using Oasys Pilset (now incorporated into Pile 19.1), and based on the loads applied from the building. Pilset also calculated the settlements of the piles due to stress changes in the surrounding soil caused by secant pile wall movements.  The stress changes in the soil were extracted from FREW and applied in Pilset.

The Arup geotechnical engineers were able to use this iterative approach due to the compatibility between the programs and the ability within the programs to quickly make changes to produce results.

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