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Double waterproof pump wells, Copenhagen

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Drytech has designed a special waterproof pump shaft that allows companies to create pumping points inside the bed.

The wells are made in the Bedano workshop, in Switzerland, and shipped to the construction site, wherever it is in the world, where they are prepared by the Drytech technician.

This is the case of the construction site opened directly in the North Sea, where 36 pump wells were installed, subsequently sealed and incorporated into the bed.

Once its function is exhausted, the Drytech pump well is waterproofed both externally and internally.

Once the casting is complete, the joint between the well and the bed is injected with DRYflex expansive resin, which seals the element by pressure, wrapping around the entire thickness of the bed.

Any water flows inside the well are instead rendered harmless by the lid sealed with gaskets both on the circumference of the well and on each of the sealing bolts.

The use of the Drytech System resulted in a saving of several weeks on the time required for the construction of the waterproof basement.

Waterproofing: Drytech Italy

Milan subway restoration

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Drytech has rehabilitated some sections of the Milan underground, during the night closure of the service, therefore without interfering with the normal circulation of trains.

The interventions were carried out with injections of DRYflex expanding resin in the joints between the slab and the inverted arch, for the entire thickness of the concrete structure of the tunnel.

The DRYflex resin is effective even in the presence of pressurized water. This made the intervention possible despite the enormous extent of the infiltrations.

Line 2 of the MM was built between the end of the 60s and the 70s without waterproofing, because the water table was much deeper. The closure of the Milanese manufacturing activities in the 1980s reduced water consumption and raised the level of the aquifer up to the tunnels of Line 2.

The infiltrations are controlled by pumping systems active 24/7, but in periods of heavy rainfall some sections were flooded. A series of waterproofing interventions for some tunnels was thus decided, carried out by Drytech between one and five in the morning.

Prefabricated underpass, Crema

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The railway underpass of Indipendenza street in Crema allows the passage of a road and a cycle path under the railway path. The work was carried out without interrupting the overlying passage of the trains.

The Drytech Tank made it possible to prefabricate the monolith near the tracks and push it to its final location with an excavation that gradually replaced it for the ground supporting the railway line.

Once positioned in place, the monolith was waterproofed in its critical points (cracks and joints) with DRYflex expanding resin injections.

Made ex-post, the waterproofing did not risk being damaged during the launching operations.

The expansion joints were prepared with DRYset injectable waterstop tapes.


Structure: Ing. Terzini, Crema

Construction: De Fabiani Spa, Cavenago d’Adda

Waterproofing: Drytech Italia, Como

Drytech Tank: 3’600 m²

Renovation with Ex-Post Drytech Tank, Italy

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Due to an underestimation of the water table, the waterproofing of the underground in this prestigious residential complex was not planned.

Unfortunately, after the construction was completed, a peak of the seasonal water table flooded the -2 level, making the garages unusable.

At this point Drytech was involved to restore the underground.

The analysis of the structural and environmental situation by the Engineering has identified the best solution in the construction of an ex-post Drytech Tank.

The industrial floor built above the gravel filling was therefore demolished. The water table was brought under control with a well-point system.

We then proceeded to lay the cracking elements in the stalls and prepare the stalls / walls and stalls / columns joints with the DRYset Channel.

The numerous crossings produced by the well-points have also been suitably prepared for the waterproofing injection, once the concrete has matured.

The new waterproof concrete slab based on the Drytech recipe was then cast.

To ensure the height of the extrados, it was necessary to create the sealed platform and the industrial floor in a single fresh-on-fresh helicopter jet.

When the concrete has matured, Drytech has perfected the injection of programmed cracks, joints and crossings with DRYflex expansive resin.

Due to its elastic quality, the resin is re-injectable, so it guarantees the possibility of maintaining the system over the years.

The construction of the ex-post Drytech platform made it possible to waterproof the basements and to deliver the properties with the usable garages.


Restoration Project: Engineering Drytech

Waterproofing: Drytech Italy

Enzo Ferrari Museum, Modena

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The Enzo Ferrari Museum in Modena is an engaging hymn to the myth of the car and the architectural manifesto of Jan Kaplicky: the Czech architect who founded the Future System in London.

The Mef can count on an area of ​​6’000 m², of which 4’400 are intended for exhibitions. The Museum is a car hood that emerges powerful from the ground. In Kaplicky’s style, the height is contained to establish a harmonious relationship with Ferrari’s birthplace, without however attenuating the evocative force of the new structure.

The exhibition spaces were developed in the basement, creating a waterproof structure of 5’850 m² with the Drytech Tank System.

Access to the museum is through an imposing curved glass wall, whose inclined plane is bisected by a series of fins that resemble the radiator of a custom-built car.

The exhibition spaces are accessed from the hall through two inclined platforms, going down to a depth of 5 meters

“Spaces defined by eight edges are not necessary, they are not mandatory”. One of Kaplicky’s famous phrases expresses well the spirit of the project, to whose sinuous lines the flexibility of the Drytech tank has been perfectly adapted.

The design phase saw an intense collaboration with Drytech Engineering to define the waterproofing solutions for the unprecedented construction details proposed by the particular shape of the basement.

Project: Future System, London

Structure: Polytechnic, Modena

Works Management: Engineer Coppi, Modena

Construction: CRB, Carpi – Ing. Ferrari, Modena

Waterproofing: Drytech Italia, Como

Drytech Tank: 5’850 m²

Drytech Ex-Post tank for oil plant, Italy

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A valve park sorts the crude oil unloaded from tankers to storage tanks.

In the specific case of the plant’s leaks in the ground, it was necessary and urgent to restore it, but without the possibility of interrupting its activity.

It was therefore decided to create an impermeable tank below the system of valves, which had been placed in contact with the ground.

With an almost archaeological approach, the ground beneath the plant was excavated by gradually inserting supports to the pipelines.

Then we proceeded to the casting of the drytech waterproof concrete slab and walls and, when the casting was ripe, the waterproofing injection of DRYflex resin in the programmed cracks, in the construction joints and in the crossings, including the pipe supports, which were left in place.

The intervention, designed and coordinated by Drytech Engineering, restored the system to safety and made it definitively accessible for maintenance.


Waterproofing: Drytech Italia, Como

Ex-post Drytech Tank: 4’000 m²

Trenord railway underpass, Saronno

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Then the excavation and casting of the Drytech waterproof concrete slab was carried out, resting on the bulkheads and prepared with the DRYset crack control elements. The whole operation took place in just three days, at the end of which the track was restored.

The procedure was therefore repeated on the other track. After another three days the line returned to full capacity, with both tracks open.

The excavation was then carried out under the slab, the casting of the platform floor of the underpass and finally the lining casting, directly against the micropiles.

When the concrete matured, joints, holes and programmed cracks were injected with DRYflex resin which, expanding, sealed them by pressure.

Drytech Engineering provided advice on aspects relating to waterproofing, collaborating with the structural engineer already in the design phase of the underpass.

Ownership: Trenord Railways, Milan

Structure: Studio I.R. Joined Engineers – Ing. Giuseppe Barbagallo, Catania

Contractor: SALCEF Spa, Rome

Waterproofing: Drytech Italy

Drytech Tank: 1,800 m²

Mantegazza Palace, Lugano

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Drytech tank system for the 5 floors of the underground car park of Palazzo Mantegazza, 15 meters from the lake, in the presence of a water table of 18.80 meters.

The basement was built in underlay, using the hanging formwork technique: after the completion of the diaphragm walls, the slab of the ground level is cast, leaving openings through which it is possible to dig up to the level of the slab -1.

Then the formwork already used for the zero slab is lowered and, once it has reached level -1, the new slab is cast on it. And so on up to the bed, at level -5.

The walls of the Drytech Tank are made directly against the diaphragm, obtaining both the lining and the wall itself in a single casting.


Project: Camponovo Architects & Associates, Breganzona

Structure: Studio Ingg. Mantegazza and Cattaneo, Sorengo

Construction: Garzoni SA, Lugano

Waterproofing: Drytech Switzerland

Drytech Tank: 6’600 m²

Teatro Alla Scala, Milan

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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.

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: Municipality of Milan, Milan

Project: Mario Botta Architect, Lugano

Structure: BMS Progetti, Milan

Construction: Consorzio Cooperative Costruzioni, Bologna

Waterproofing: Drytech Italia, Montano Lucino COMO

Drytech tank: 3,350 m²

Branca Crescent, Melide

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There are only two ways to build a waterproof structure directly in water: either the classic double tank, or the single tank of the Drytech Tank technology.

The undergrounds of the Villa Branca Residence in Melide, on the banks of the Ceresio, were built with this system.

A luxurious crescent consisting of 16 apartments and 5 penthouses, with terraces, roof gardens, whirlpools and parking below the lake level.

In addition to allowing underwater installation, the Drytech tank ensured compliance with the internal volumes envisaged in the project, being a single waterproof concrete structure.

Drytech Engineering has defined the recipe for waterproof underwater concrete. As the casting matured, the construction details were waterproofed with the injection of DRYflex resin, effective despite the presence of water outside the new tanks.

Client: Chiancianesi & Longoni, Pregassona

Project: Archiconsult SA, Lugano on behalf of Marco Chiancianesi and Daniele Longoni with the architectural supervision of Source Project Manager SA

Structure: Ing. Alessio Casanova, Pazzallo

Company: PromEng SA, Lugano Besso

Waterproofing: Drytech Switzerland

Drytech Tank: 2,900 m²