Pipe Jacking

Pipe Jacking An introduction to pipe jacking prepared by the Pipe Jacking Association

Pipe Jacking

Pipe Jacking

Microtunnelling

Safe and Well Engineered ß ß ß ß ß ß ß

Engineered Safe Cost effective Flexible joints Structural Watertight Finished pipeline delivered

Benefits of Pipe Jacking ß ß ß ß ß ß

Structurally sound Continuous ground support Minimal joints Gasketed flexible joints Maintenance-free Good flow characteristics

Environmental Benefits ß ß ß ß ß ß

Reduces disruption Reduces damage to services Highway protected 90% less vehicle movements Less spoil Less quarried material

Lower Capital Cost ß

No secondary lining

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Economic alternative to deep open cut

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Socially acceptable

Applications ß ß

New foul and surface water drainage Infrastructure and river crossings for utilities

Machine Technology Machines are available for pipe jacking in most ground conditions

Machine Technology Machines are available for pipe jacking in most ground conditions ß

Open face cutter booms

Machine Technology Machines are available for pipe jacking in most ground conditions ß ß

Open face cutter booms Backacters

Machine Technology Machines are available for pipe jacking in most ground conditions ß ß ß

Open face cutter booms Backacters Tunnel boring machine

Machine Technology Machines are available for pipe jacking in most ground conditions ß ß ß ß

Open face cutter booms Backacters Tunnel boring machine Earth pressure balance

Machine Technology Machines are available for pipe jacking in most ground conditions

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Open face cutter booms Backacters Tunnel boring machine Earth pressure balance

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Slurry

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Safe and Efficient ß ß ß ß ß

Mechanised excavation Quick Ground support Remote control Safe working

Laser Guidance ß ß ß

Real-time line and level checks Maintains accuracy in difficult ground Allows remote operations

Research ß

14 years research

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Oxford and Cambridge Universities involved

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Supported by water companies and the EPSRC

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Research both laboratory and site based

Research Test Rig

Research Instrumented Pipe

Research Model Screw Conveyor

Research Foam Generator

Research Projects ß

Laboratory testing of model jacked pipes

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Field testing of performance of pipes

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Finite element analysis of concrete jacking pipes

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Full scale testing of concrete pipes

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Soil conditioning and lubrication materials

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Field testing of soil conditioning and lubrication methods

Design Guide ß ß ß ß ß ß

Soils investigation Excavation systems Temporary and permanent works Jacking lengths and friction forces Best installation practice Worked examples and checklists

Proven System ß ß ß ß

Extensively installed 150mm to 3m+ diameters Long drive lengths Engineering performance

Alternative Applications Box Sections ß Subways ß Roadways

Other uses ß jacked arches ß bridge abutments

Pipe Jacking Pipes ß

Concrete jacking pipes: EN 14457

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Installation forces are key

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Follow manufacturers recommendations

Summary ß ß ß ß ß

Engineering integrity Low capital costs Low maintenance Cost-effective Environmental benefits

The PJA and Industry Links Established for over 30 years the Pipe Jacking Association has links across the industry: ß ß ß ß ß ß ß

British Standards Institution/CEN British Tunnelling Society Construction Industry Training Board Departments of Civil Enginering at Oxford and Cambridge Universities Transport Research Laboratory Health & Safety Executive Ground Forum

Pipe Jacking Association 10 Greycoat Place, London SW1P 1SB Tel: 0845 070 5201 Fax: 0845 070 5202 Email: [email protected] Website: www.pipejacking.org