Pipejacking & Microtunnelling

James Thomson

Part 1 Development of trenchless technology: recent growth of trenchless technology - categories of trenchless technology; defining pipejacking and microtunnelling - pipejacking, microtunnelling. a historical perspective - pipejacking, microtunnelling. Part 2 Pipejacking and microtunnelling methods: elements of pipe jacking - the face, the line, the jacking pit, top side - surface equipment. applications of pipejacking and microtunnelling - line installation, installation of ducts, crossings, pipe excavation techniques; advantages and limitations of pipejacking and microtunnelling - working in a wide range of soil conditions, minimizing damage to property and existing services, minimizing disruption to the public and the environment, safe working for operatives and public safety installing to owner's satisfaction, providing a cost-effective solution. Part 3 Equipment - shields and tunnel boring machines: introduction, classes of equipment - conventional (open) shields, compressed-air shields, Auger-type shields, pressure chamber shields, design and construction of shields. spoil cutting - manual excavation, partially-mechanized excavation, rotary cutting arms and sheels, full face machines, crushing heads, rock heads; shield location, guidance and monitoring - location, guidance, monitoring additional information. Part 4 Pipejacking - line, drive pit, top side: spoil removal - wheeled systems, belt and chain conveyors, positive displacement pumps, pumped slurry, screw conveyors, vacuum extraction. jacking equipment - jacking rigs, intermediate jacking stations (IJSs); top side - surface equipment - spoil handling and disposal, pipe and other material handling, power supplies - air, hydraulic and electric. Part 5 Equipment - microtunnelling: classifying microtunnelling equipment. pilot-bore microtunnelling - stage one, the pilot bore