available by the Geoengineer Website
How each precast part is placed and stabilized next to the other
Each pre-cast element is sunk next to the other with the use of GPS technology (to find
the exact position) and the use of a hydraulic pump which pumps water from the tunnel.
Of course, first, the sides of the tunnel are closed with a steel slab (you can see the
supports in photo1). The element is sunk next to the other so that they fit. Then the
water which is in the tunnel (so that it can be sunk) is pumped out, and because of the
hydrostatic pressure, the one pre-cast element compresses the other. Between the two
parts there is a plastic liner which protects the concrete portions from being damaged.
(see photo 2). No other support exists for the connection of the pre-cast elements with
the exception of a pre-stressed concrete slab..
the exact position) and the use of a hydraulic pump which pumps water from the tunnel.
Of course, first, the sides of the tunnel are closed with a steel slab (you can see the
supports in photo1). The element is sunk next to the other so that they fit. Then the
water which is in the tunnel (so that it can be sunk) is pumped out, and because of the
hydrostatic pressure, the one pre-cast element compresses the other. Between the two
parts there is a plastic liner which protects the concrete portions from being damaged.
(see photo 2). No other support exists for the connection of the pre-cast elements with
the exception of a pre-stressed concrete slab..
Then gravel material is placed on the outer
side of the tunnel. From the inner part,
the connection is supported with concrete
(photo 3)
side of the tunnel. From the inner part,
the connection is supported with concrete
(photo 3)
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