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Aug 07, 2023 News Sotiris Kanaris Barhale has been awarded a contract by Thames Water to reinforce a 70m long section of the Thames Lee Tunnel running across the route of HS2 in Camden, North London. The value of the contract has not been disclosed.
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Today, supply and discharge lines are still predominantly installed by using the open-cut method: a trench is dug, the lines are installed. Under the protection of an embankment or sheeting and the trench is filled afterwards. In the face of the numerous disadvantages as well as the citizens' growing environmental consciousness in the future it is urgently necessary to take trenchless technology into account much stronger than until today as an alternative … |
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May 04, 2020 Method of operation and sequence Microtunnelling with auger spoil removal is characterized by the jacking of pipes in soils with simultaneous excavation of the working face using a cutting head and by continuous removal of the spoil with a spiral conveyor or auger, which is guided inside a spiral conveyor guide pipe, towards the starting shaft. (Image: Technical components for microtunnelling with auger spoil removal in single phase jacking) (Image: … |
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(Image: Equipment, possible arrangement of the components on the construction site and space requirement (approximately L × W = 22.0 × 4.0 m) in microtunnelling with auger spoil removal - top view (on the model of the jacking of pipes DN/ID 600, pipe length 2.0 m)) The dimensions of the starting shaft are determined by the type of machine and the selected size and length of the jacking pipes. Today, use is made mostly of prefabricated reinforced concrete … |
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May 04, 2020 |
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May 04, 2020 |
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May 04, 2020 Possible measures for the application in groundwater-bearing soil:
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May 04, 2020 |
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May 04, 2020 (Image: Microtunnelling with hydraulic spoil removal in single phase jacking) (Image: Basic equipment, possible arrangement components on the construction site and space requirements (ca. L × B = 35 × 4 m) for microtunnelling with hydraulic spoil removal - plan view (on the model of the jacking of pipes DN/ID 600, pipe length 2.0 m)) Method of operation and sequence Microtunnelling with hydraulic spoil removal is characterized by the jacking of pipes … |
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(Image: Basic equipment, possible arrangement components on the construction site and space requirements (ca. L × B = 35 × 4 m) for microtunnelling with hydraulic spoil removal - plan view (on the model of the jacking of pipes DN/ID 600, pipe length 2.0 m)) The dimensions of the starting shaft are determined by the type of machine and the selected size and length of the jacking pipes. Today, use is made mostly of prefabricated reinforced concrete … |
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(Video: Integrated high-pressure flushing system in the crusher space of the AVN microtunnelling machine) |
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It is not possible in all cases (e.g. in the later creation of drainage pipes in waste dumps and contaminated areas or the creation of pipe arches [Camp01]) to excavate target shafts, for instance, for the removal of microtunnelling machines. In such cases, only microtunnelling machines that are suitable for the jacking of blind borings can be used, and which, after reaching the target point, can be pulled back again through the jacked pipe string … |
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May 04, 2020 In microtunnelling with hydraulic spoil removal, the flushing medium is circulated with the aid of pumps through an enclosed piping system inside the jacking pipe string that is successively increased in length with the installation of a new jacking pipe. When using water as a flushing medium usually settling basins suffice for separation. (Image: Fluid circulation of microtunnelling by means of hydraulic spoil removal) (Image: Settling basin to separate … |
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May 04, 2020 |
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(Video: Schematic illustration of a two-stage hydrocyclone separation plant with subsequent centrifuge) |
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May 04, 2020 |
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