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Details of Grant 

EPSRC Reference: GR/K38229/01
Title: PROP LOADS IN LARGE BRACED EXCAVATIONS
Principal Investigator: Powrie, Professor W
Other Investigators:
Researcher Co-Investigators:
Project Partners:
Carillion CIRIA NERC Grouped
Pre Nexus Migration
Department: School of Engineering & Materials Scienc
Organisation: Queen Mary University of London
Scheme: Standard Research (Pre-FEC)
Starts: 19 September 1994 Ends: 01 January 1995 Value (£): 103,055
EPSRC Research Topic Classifications:
Ground Engineering
EPSRC Industrial Sector Classifications:
Transport Systems and Vehicles Construction
Related Grants:
Panel History:  
Summary on Grant Application Form
Prop loads in braced excavations are rarely measured in any systematic way, but field observations suggest that in practice, prop loads are generally much smaller than those anticipated on the basis of the several types of design calculation currently in use. If the reasons for this discrepancy can be determined and quantified, there is considerable scope for reducing the amount of temporary propping used to support the retaining walls of large excavations. This would lead to immense savings in terms of time and money.It is proposed to carry out a co-ordinated programme of research involving the monitoring of retaining wall movements and prop loads during construction of the Jubilee Line extension stations at Canary Wharf and Canada Water. The data would be used, in conjunction with design-type calculations and state-of-the-art back-analyses, to investigate the discrepancies between theory and practice with reference to a number of practical issues. The overall aim of the project, which would be carried out in collaboration with the civil engineering contractors involved in the construction of the stations, is to generate rational guidance on temporary prop loads in large excavations, suitable for use in design.
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