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Sep 12, 2008 In perpendicular trenches (slats) 0.4 m to 1.20 m width, 2.0 m to 5.0 m long that are created by special diaphragm wall grabs, prefabricated reinforcing cages are placed and concrete is poured. The collapse of the walls is prevented by a filling with a supporting fluid with thixotropic properties (Bentonite suspension). Horizontal concrete sections are limited by means of formwork pipes or similar. The concreting process can be carried out in-line … |
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Feb 06, 2020 (Image: Construction of the baffle wall (reinforced concrete) on both sides of the slot for the diaphragm wall excavator) (Image: Completed baffle wall for the diaphragm wall excavator) (Image: Excavation of the diaphragm wall - Diaphragm wall excavator) (Image: Detail of diaphragm exhibitor) (Image: Reinforcement cages for the diaphragm wall) (Image: Concreting the diaphragm wall) (Image: Chipping of the top of the baffle and diaphragm wall, exposing … |
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Sep 12, 2008
(Video: Excavator in diaphragm wall operation) |
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Sep 12, 2008 (Image: Starting shaft with bored pile wall) Bored pile walls with vertical lining walls made up of in-cast concrete piles next to each other, each being approximately 0.5 m to 1.5 m in diameter and erected in cased boring holes from the surface, with or without reinforcement.
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Sep 12, 2008
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Sep 12, 2008 (Image: Working steps when creating a bored pile wall [Balda88]) |
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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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