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Puerta de Jerez underground station has been built under a two-storey underground car park. The station has three floors under the car park, and once it was completed, the car park was reconstructed on top of the station. One TBM tunnel had been bored below the car park before construction of the station and the other during construction. As a closure wall should surround the constructed tunnels, and in order to avoid damage to the parking and neighbouring buildings due to tunnel construction, jet-grouting screens were built around the station. The complex station has several diaphragm walls and pile walls. Inclinometers, topographic marks and piezometers have been placed so as to control deformations produced by the different construction operations. The construction process has been simulated using Plaxis 2D program and a Hardening Soil model. This has allowed correction of the soil parameters during construction and finding the ground loss produced by tunnel boring.
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