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The shaft boring machine is lowered into the launch shaft structure and attached firmly to the shaft with its three machine arms. A rotating cutting drum equipped with chisel tools is attached to a telescopic boom. This roadheader excavates and breaks the soil at the base of the shaft. The roadheader is telescopic, and can swivel up and down or rotate. Hence, the entire cross-section of the shaft plus an overcut can be excavated gradually. The excavated … |
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(Image: CCB method: shaft boring method with reinforced concrete upper shaft rings for use in soil [FI-KCMM] - Inserting the core boring crown with torsion resisting connected reinforced concrete shaft rings in the rotary table) (Image: CCB method: shaft boring method with reinforced concrete upper shaft rings for use in soil [FI-KCMM] - Reinforced concrete shaft ring with removable steel upper shaft ring placed on top) (Image: MS-HBM-CR method (… |
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(Table: Creation of the exit and entry openings with reference to the type of lining [FI-Steina]) |
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(Image: Exit opening with dopple elastomer ring seal and recoil brake) (Image: Exit opening with dopple elastomer ring seal and recoil brake) (Image: Exit opening with dopple elastomer ring seal and recoil brake - Detail) (Image: Entry opening in a target pit of spray concrete without groundwater - Opening has a limited reinforcement ratio) (Image: Entry opening in a target pit of spray concrete without groundwater - Breakthrough of the tunneling … |
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(Image: Elastomeric seal ring for gasketed openings for sealing exit- and entry openings - Single seal (fixed with loose flange)) (Image: Elastomeric seal ring for gasketed openings for sealing exit- and entry openings - Single seal) (Image: Elastomeric seal ring for gasketed openings for sealing exit- and entry openings - Double seal) (Image: Elastomeric seal ring for gasketed openings for sealing exit- and entry openings - Double single seal) (Image: … |
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In this variant, a pressure resistant steel container is fastened to the inside wall of the shaft and this is closed to the inside wall of the shaft by means of a blind flange and at the outer side by means of a removable lining in the form of sheet piles or the special prepared lining region for traversal of the microtunnelling or shield machine in the region of the exit and entry opening. Depending on the method of opening, the gasketed opening … |
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(Image: Principle sketch of a jacking station for microtunnelling with auger spoil removal installed inside the starting shaft) (Image: Examples of abutment designs - Abutment in the form of a reinforced concrete plate and an in cast concrete block during pipe jacking [TUGraz01]) |
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(Image: Abutment design without shaft - Sketch [PJA83]) (Image: Abutment design without shaft - Of rammed sheet piles with filling and load distribution plate in front [FI-Zübli]) (Image: Abutment design without shaft - Plan view with backfilled intermediate spaces [FI-Zübli]) (Image: Abutment design without shaft - Front view [FI-Zübli]) |
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May 19, 2011 This presentation is part of the series of presentations "Utility Tunnelling" and deals with the building of starting and target shafts and the design of exit and entry openings. |
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Aug 03, 2005 Shafts are usually always necessary for trenchless installation of pipelines with the methods of microtunnelling and pilot pipe jacking. The term shaft is understood to be a depression in the ground surface that is created by sinking (excavation or vertical boring), with suitable support, that serves for the underground creation of bore holes with the aid of the methods of trenchless installation and for the transport of humans, machines, substances (… |
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