For shoring of the excavation of the parking area with a sandy-pebbly geology and with a maximum excavation height of 16m under the ground water table, 6.000 m of interlocking bored piles with a diameter of ø80 cm and 11.000 m of prestressed anchorage have been constructed. Also, in order to minimize the ground water and to increase the passive resistance of the soil, 16.000 m of jet-grout columns have been constructed in the ground.
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