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Sep 12, 2008
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Sep 12, 2008 (Image: Working steps when creating an injection wall (column row) [FI-Keller]) |
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Sep 12, 2008 (Image: Application of the spray concrete) (Image: Application of the spray concrete) (Image: View into the starting shaft with spray concrete support - Extension of the exhavation) (Image: View into the starting shaft with spray concrete support - Making of the entry opening) Securing surfaces with sprayed concrete can be carried out as necessary as a thin sealing layer, as a structural, reinforced sprayed concrete coat of little thickness or as a … |
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Sep 12, 2008
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(Image: Creating the exit openings in a closed sinking shaft using in cast concrete [Biele79b] - Recesses of the exit opening) (Image: Creating the exit openings in a closed sinking shaft using in cast concrete [Biele79b] - Bricking up the exit opening) |
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(Table: Sinking shaft made of precast reinforced concrete - Shaft rings) (Table: Sinking shaft made of precast reinforced concrete - Shaft rings) |
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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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