Reports
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The Behaviour of Buried Plastic Pipes at Different Depths
Price: £100
Ref: 01/WM/02/17
ISBN: 1 84057 2434
Monitoring of buried PVCu and thin wall biaxially oriented pipe at operational sites at Chorley and York has shown that loads and deformations of the pipe are predominately generated during installation and that subsequent transient traffic loads produce no permanent changes. Measurements of backfill temperatures have shown long time lags between changes in surface temperature and those at pipe depths. Data from monitoring pipe laid at shallow depths and from laboratory tests have demonstrated that water temperature dominates the pipe environment. The site measurements show no evidence of freezing in mains laid with 750mm cover. Projections from laboratory tests to simulate worst case conditions have shown that very prolonged periods of cold weather would be required to freeze water in plastics mains laid with reduced cover of 750mm. With tough PE pipes purchased to Water Industry Specifications, there are not believed to be any serious concerns regarding structural performance if there is controlled us
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The Environmental and Social Value of Leakage Reduction
99/WM/08/24 - ISBN: 1 84057 161 6This research develops a methodology for incorporating environmental and social costs and benefits into the evaluation of water management options. Approaches to valuing changes in external costs are developed. In addition, ... More...
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Performance of Electrofusion Joints for PE Pipes
99/WM/02/10 - ISBN: 1 84057 153 5The large number of service failures of electrofusion joints remains of prime concern to UK water industry. This investigation combines the findings of two year's work looking at the effects of site conditions, joint preparat... More...
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A Review of Leakage - Updating Managing Leakage Methodology and Theory
97/WM/08/10 - ISBN: 1 84057 036 9The first update of 'Managing Leakage', the 1995 water industry report. Economics of leakage methodology, both short and long term is developed in detail. There are case studies on whole- life costing. Seven key areas of UKWI... More...
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Plastics Pipeline Systems Evaluation of Long- term Performance – The Behavious of Buried Pipes
97/WM/02/5 - ISBN: 1 84057 038 5Details the loads, temperatures and effects of the soil on two sections of 250mm continuously monitored PVCu pipe and assesses the changes in performance of an exhumed MDPE pipe. Indicates that design criteria are conservativ... More...
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The Residual Structural Properties of Cast Iron Pipes – Structural and Design Criteria for Linings for Water Mains
01/WM/02/14 - ISBN: 1 84057 239 9The options for relining of old cast iron water mains depend crucially on the perceived condition of the old pipe. All the pipe condition databases which are known to exist in the UK have been combined to give an appreciation... More...
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