Comune di Milano

Waterproofing of the stage pit of the La Scala theatre

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As part of the renovation and expansion of the Teatro Alla Scala in Milan designed by architect Mario Botta, the waterproofing of the scenic pit was carried out, with 850 m² of stalls and 2,500 of walls.

Drytech carried out the waterproofing of the colossal stage pit of the La Scala theatre in Milan, reducing the Gantt diagram by 90 days compared to a traditional waterproofing system.

As part of the renovation and extension of the Teatro alla Scala in Milan designed by architect Mario Botta, the waterproofing of the stage pit was carried out, with a Drytech Tank of 850 m² of stalls and 2,500 m² of walls.

The Drytech Tank System was chosen because it made it possible to waterproof the tie rods of the unloaded floor.

It also saved about 90 days of work for the entire calendar of works because the waterproofing activities are independent and parallel to those of the construction site and are in fact removed from the Gantt chart.

A further saving of time and resources derives from the fact that the elevations of the Drytech tank are thrown directly against the micropiles, making the lining and the wall coincide.

The new stage tower rises 38 meters and the stage pit is 18 meters deep. The new structure behind the stage allows you to manage the sets of 3 shows at the same time.

Sophisticated stage machines allow you to completely change the show in just 6 minutes.

Client: Comune di Milano, Milano

Project: Mario Botta Architetto, Lugano

Structure: BMS Progetti, Milano

Construction: Consorzio Cooperative Costruzioni, Bologna

Drytech Tank: 3,350 m²

Waterproofing the diaphragm wall of a five-storey underground

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In Piazza Sant'Ambrogio in Milan, the company Borio Mangiarotti S.p.A. built a five-storey underground car park.

Waterproofing the diaphragm wall of a five-storey underground car park with the Drytech Tank system increased the internal volume and the number of available parking spaces.

In Piazza Sant’Ambrogio, in Milan, the construction company Borio Mangiarotti S.p.A. built a five-storey underground car park.

Drytech has designed a waterproofing system for the diaphragm, based on Injectable Waterstop Tapes.

By making the diaphragm waterproof directly, it was not necessary to create the lining wall, thus increasing both the internal volume to comply with the legal limits, and the surface, or the parking spaces available.

The Injectable Waterstop Tape for the joints between the partitions of the diaphragms is a Drytech patent that makes it possible to maintain the joint with ex-post injections of resin, performed in the event of any infiltrations.

The Drytech tape is laid with a special sheet piling which acts as a formwork of the diaphragm wall.

The diaphragm of the parking lot that flanks the Milanese basilica drops to a depth of 22.70 meters and the laying of a sheet pile of this size required special care by the company’s technicians, to ensure perfect alignment of the joints.

At the end of the casting, the sheet pile is extracted, equipped with a new belt and repositioned for the casting of the next septum.

The re-injectability of the DRYflex resin guarantees the possibility of carrying out maintenance on the diaphragm at any time, by intervening from inside the structure, without excavation or demolition and, above all, without having to close the car park.

Client: Comune di Milano

Structure: Ingegner Domenico Insigna, Milano

Construction: Borio Mangiarotti SpA, Milano

Drytech Tank:
Diaphragm: 5,600 m², h 22.70 m
Bed: 3,300 m²