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Retail Express


A historic rail hub in Madrid becomes a runaway hit with commuters and shoppers when retail and entertainment components are integrated.




In the heart of Madrid's historic area, where the Principe Pio transit station has been in operation for 125 years, finding land suitable for redevelopment is virtually impossible. Located in a residential neighborhood only 100 meters from the Royal Palace and other tourist attractions that date back to the 17th century, the station serves 73 million people a year with two regional train lines, two subway lines, and one of the city's largest bus stations.

As much as the area offered in history and culture, it lacked shopping, dining, and entertainment options for transit users, tourists, and residents. That is, until Renfe, the Spanish public rail authority, held a competition to renovate the station and integrate retail and leisure components into underused parts of the 79,804-sm site.

Riofisa, the local development firm that won the competition, hired the London office of architecture firm RTKL Associates to infuse the transit hub with 410,000 sf of retail and entertainment space. "There were all of these people walking back and forth on a property that was completely empty," says RTKL VP Jorge Beroiz, AIA. Riofisa's Fernando Sánchez de las Matas calls the station site the "best space for a commercial center in Madrid."

Constructed while the station remained in operation, the $130 million project was completed last November. It is drawing 60,000 visitors a month and is 100% leased at rates 20% above the city average, making it "one of the most successful commercial projects in Spain," says de las Matas. The project is a finalist in the shopping centers category in this month's MIPIM awards, which honor international real estate projects.

Principe Pio is comprised of four primary parts. The first, the old train station, was fully restored to its original appearance; at the same time, three levels of retail and restaurant space were added to it. The second component is a new building for retail and a nine-screen cineplex.

The third element, a glass-domed atrium, connects the old terminal to the new building; it has become the development's new main entrance and circulation area. Finally, three levels of underground parking are provided for 840 vehicles.

In all, Principe Pio now takes in more than 70 high-end retail shops, 15,000 sf of restaurants, a 4,500-sf anchor department store (Zara), and a 15,000-sf Warner Brothers cinema.

Tracks make way for retail

The central question posed by the project was straightforward, says RTKL Beroiz: "Is it a train station or a retail center? They have very different aesthetics." The train station, he notes, is essentially a civic building, serious and formal, and the rail authority wanted a very traditional approach to the expression of the building. On the other hand, RTKL's client, Riofisa, wanted a vibrant, "very in-your-face type of project" for the retail and leisure center, says Beroiz.

Adding yet another layer of complexity, due to the historic nature of the train station, the Building Team also had to win approvals from the historic preservation group, Spanish Heritage.

RTKL's solution was to restore the existing structure and take a contemporary approach with the new elements of the project. The existing station, a two-story classically styled building constructed in 1933, fronted two linear railroad platforms that date to 1880s; these were covered by skylit canopies.

Restoration work, such as cornice repair, was conducted on the exterior of the front building, but the condition of the original brick made it impossible to be fully restored. Instead, the building was painted a red brick color to evoke its original building material. Restored ship windows on the outside facade provide views into and out of the retail shops on the first level and the restaurants on the second level.

The most dramatic change to the existing station took place under its main canopy, where the team "built a new building inside an old building," says de las Matas. Train tracks beneath the canopy were removed and consolidated under the station's shorter secondary canopy to make way for a multi-level retail space designed in a modern vernacular of steel and glass. The linear mall stretches the length of the main canopy, with stores and restaurants on either side of the pavilion. Enclosing the main canopy in glass preserved the station's original aesthetics, says de las Matas.

Before the canopy could be restored and enclosed, however, the engineers had to devise a way to allow excavation and construction of the area underneath it to provide for a level of below-grade retail space and three levels of underground parking. Bilbao-based Idom engineers suspended the canopy in place by segmenting the main columns and temporarily diverting the load through a special gantry. Once the below-grade construction was completed, the columns were rebuilt and the gantry removed. "Seeing all that metal in the air was incredible," RTKL's Beroiz.

The project initially met with resistance from some local residents who feared the crowds the retail might bring, but five months into its new life as a transit and retail development, Principe Pio has enlivened the station and spurred renovation among area hotels and other businesses, says Beroiz. And a 2,000-seat performance theater now in design by another Building Team is scheduled to open on the site of the complex in two years.

The retail stores in the development have also had something of a windfall from their unique location. Due to their tie-in to the train station, they are permitted to stay open on Sunday, when, by law, other retail centers in Madrid must be closed.

Ironically, the Building Team seems to have miscalculated how people would use the complex. Statistics show that 6–9% of rail commuters are taking the time to shop and dine at the facility, which is considerably higher than expected, says Beroiz. Conversely, except on Saturdays, only one of the parking three levels is used. "We thought there was not going to be enough parking, but they all come by train," says de las Matas.

 

Blending Principe Pio's transit and retail components

Requirement:
  • Integrate retail into existing historic transit station.
Solution:
  • Restore existing station.
  • Relocate train tracks.
  • Insert contemporary retail under existing main canopy.
Requirement:
  • Existing station building to remain unobstructed by new construction.
Solution:
  • Glass dome transitional space connects existing and new building.

Project Summary

Principe Pio Madrid, Spain

Building Team

Owner: Renfe rail authority

Developer: Riofisa

Architect: RTKL (London office)

Construction manager: Eralan

Structural engineer: Idom; Schlaich Bergermann and Partner

Mechanical/electrical/civil engineer: Idom

Life safety: Idom

Lighting: Theo Kondos

Landscape architect: Derek Lovejoy

General Information

Site: 79,804 sm

Area: 410,000 sf

Number of floors: 3

Number of parking levels: 3

Construction cost: $130 million

Completion date: November 2004

Glass bubble unobtrusively unites historic and new parts of Principe Pio complex

A requirement that the Principe Pio's historic transit station building remain unobstructed by new construction presented the Building Team on the redevelopment project with a dilemma. "Anything you would put next to the building would compete with it," says Jorge Beroiz, AIA, VP of the London office of architecture firm RTKL Associates.

An open plaza was originally planned as the transitional space between the existing building and a new retail and cineplex building. This eventually gave way to the idea of using a 1,000-sm glass membrane as a neutral node, linking the existing and new buildings and serving as the primary circulation space for the complex.

A 14-meter height restriction placed on the project to prevent the existing building from being overwhelmed by the new construction resulted in a glass enclosure that slopes downward from its 14-meter-high connection at the new building to 10 meters where it connects to the gabled face of the existing building. The vaulted "bubble" dome, which caps the sloping glass enclosure, maintains the visibility of the existing building, while providing an elegant architectural feature for the complex's main entrance.

Structural engineer Michael Schlaich, of Schlaich Bergermann and Partner, Stuttgart, Germany, designed the transitional node to meet RTKL's requirement of a column-free space.

Using computer technology and nonlinear analysis, Schlaich designed a slender, lightweight shell structure comprised of a triangular steel grid, which is covered by triangular glass panes, similar to the roof of London's British Museum. The grid is formed by hollow steel sections, with six of them meeting at each node in the structure, says Schlaich.

The shell is supported on a stiff edge beam, which leads the roof reactions into the ground or the adjacent buildings. The layout of the grid and the corresponding glass, whose maximum edge size is less than 2.5 meters, is the result of an "optimizing process, which led to very similar triangular elements and a pleasing appearance," Schlaich says.

Beroiz marvels at Schlaich's bubble: "I have no idea how it is supported."


  

© 2008, Reed Business Information, a division of Reed Elsevier Inc. All Rights Reserved.




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