Princess Grace Hospital – Monaco

Published: September 30, 2014
  • CHPG - Site Perspective ©AIA CHPG - Site Perspective ©AIA
  • CHPG - Perspective of the hall ©AIA CHPG - Perspective of the hall ©AIA

 

Elegant as its namesake, the new Princess Grace Hospital (CHPG) in Monaco is receiving top care and treatment from leading infrastructure experts; with Tractebel Engineering bringing unusual structural and building design expertise to the project.

MORE THAN A FACE LIFT

Design work for the extension of the Centre Hospitalier Princesse Grace (CHPG) began in 2013, preparing for first stages of construction in 2015. Completion of the state-of-the-art hospital will take over 10 years under the care of consortium leader AECOM and leading experts. Read more

SURGICAL PRECISION AND SAFETY ASSURED

Given the need for the hospital to still function during construction, the highly constrained Monaco site and its seismic context, the project planning and technical challenges are as exceptional as the new building promises to be – presenting our experts with opportunities to incorporate unusual and innovative solutions. Read more

AN EXEMPLARY PROJECT

The CHPG project is of global interest due to its seismic challenges and solutions. A scientific paper presenting the project was presented at the Second European Conference on Earthquake Engineering and Seismology and was presented at the 15th European Conference on Earthquake Engineering in Istanbul. Click here to view paper.


 

The AECOM team (from l. to r. ) : Xavier Thollard (Tractebel Engineering), Vincent Pereira (AIA Management), David Caron (Atelier d'architecture NMI), Daniel Pardo (AIA Associés), Charles Peres (AECOM), Peggy Le Bihan (AIA Ingénierie) ©AECOM

MORE THAN A FACE LIFT

Design work for the extension of the Centre Hospitalier Princesse Grace (CHPG) began in 2013, preparing for first stages of construction in 2015. Completion of the state-of-the-art hospital will take over 10 years under the care of consortium leader AECOM and leading experts.

EXPANSION CONCEPT
First inaugurated in 1902 and re-founded in 1958, the CHPG today is a low rise, ageing building with high running and maintenance costs. Initiated by the Monaco Government, the spectacular upgrade of the hospital is both a healthy financial and social decision; assuring its citizens of the best levels of medical care and comfort, technical facilities, as well as a more efficient, rationalised operation.

Expanding the hospital footprint in the East section of the current site will require part demolition of the old complex and excavation into the mountain behind to achieve the ± 80,000 m2of state-of-the-artnew technical suites, operating theatresand 400 beds foreseen. Rising almost 4 x higher than the original building, the future hospital will feature; a partially buried substructure of 5 levels, with new parking, topped by a superstructure of 12 levels (complete with a rooftop helipad),  floating above a double volume atrium overlooking the Mediterranean Sea.

HIGH LEVEL EXPERTISE TO MATCH
AECOM
is leading a consortium which includes AIA Associés as international architect, Monaco architect Natacha Morin Innocenti, AIA Ingénierie for technical works and Tractebel Engineering for the foundations and structural design, detailed design calculations and ergonomic elevator system design. The control bureau is SOCOTEC. With all players involved recognised leaders in their field, the level of expertise is at an all-time high.


  • CHPG - Modal Analysis ©Tractebel Engineering (France) CHPG - Modal Analysis ©Tractebel Engineering (France)
  • CHPG - Modal Analysis ©Tractebel Engineering (France) CHPG - Modal Analysis ©Tractebel Engineering (France)
  • CHPG - Seismic joints and identification of the different blocks (plant view) ©Tractebel Engineering (France) CHPG - Seismic joints and identification of the different blocks (plant view) ©Tractebel Engineering (France)
  • CHPG - Foundation system ©Tractebel Engineering (France) CHPG - Foundation system ©Tractebel Engineering (France)

 

SURGICAL PRECISION AND SAFETY ASSURED

Given the need for the hospital to still function during construction, the highly constrained Monaco site and its seismic context, the project planning and technical challenges are as exceptional as the new building promises to be – presenting our engineers with opportunities to incorporate unusual and innovative solutions.

A STEP BY STEP PROCEDURE
The site, encircled by busy roads, including the main Avenue Pasteur, presents many constraints requiring sectioned detours to allow for demolition, excavation and realisation of deep foundations as well as delivery of vast amounts of concrete. Project execution will be achieved in multiple phases – always with the goal of limiting nuisance factor for the working hospital during construction and in the future; for example, special acoustic wall treatments to cut out traffic noise are foreseen.

INTENSIVE SEISMIC CARE
With the substructure part buried in the mountainside, the geotechnical characterisation of the rock and soils exposed in excavations is another factor impacting structural design, soil reinforcement, retaining walls and foundations.  Being a seismic region, Monaco’s already strict building regulations are increased by the hospital function and need to withstand a tremor of high magnitude. The site is classified level 2 and the building category is level D – the maximum in seismic engineering. Drawing on experience of more massive, critical structure isolation (e.g. Arche de La Défense in Paris and structural engineering of NPPs) the design team has envisaged using elastomer bearing pads below a concrete slab to isolate the superstructure. In effect, in a tremor the substructure will move with the ground while the superstructure will stay independent. It is the first time such a system has been applied to a “standard” building in the region.

ARCHITECTURAL INTEGRITY
Respecting the Principality’s wish to minimize use of steel in construction in favour of locally supplied concrete, another challenge is the vast open, double-volume atrium which forms the base of the superstructure. Proposing an unusually high-performance, prestressed concrete to cast the very thin 8m high columns that will support it, Tractebel Engineering engineers have calculated it is possible to achieve this dominant feature, staying true to the architectural vision, while assuring the structural integrity of the building.

EXTENDED SCOPE
In addition to its core mission, Tractebel Engineering is also taking charge of realising the detailed design calculations for construction. A further complimentary mission is for the design of the elevator system for easy mobility of patients, medical staff, theatre trolleys etc.  As the new CHPG will be classified as a “high-rise” building, special consideration has to be given to safety, as well as fire and emergency evacuation, with the sub- and superstructures able to resist fire spread for up to 5 hrs. It’s one more challenge, but with Tractebel Engineering’s experts on the case, that won’t stop the new CHPG from being a success for one minute.

“This project is very specific to Monaco – in terms of its size, importance, constraints, complex techniques and calculations, the CHPG project presents almost every known challenge it is possible to face in one building – linking theory with practical application it is very special for us to resolve.”
Xavier Thollard, CHPG Project Leader, Tractebel Engineering

Expert Contacts

Facilitating relations with expert peers in Monaco, Xavier Thollard, CHPG Project Leader represents Tractebel Engineering on 2 key French Commissions responsible for setting industry norms, standards and safety levels: The CNPS – Commission de Normalisation Parasismique and the CNC2M – Commission de Normalisation de la Construction Métallique et Mixte (mixed steel and concrete construction).

More in Monaco

Tour Odéon in Monaco - 2014

Another towering achievement for Tractebel Engineering (France)/Coyne et Bellier in Monaco is the 170 m tall, 100,000 m2 Odéon Tower (Architect: Alexandre Giraldi; Owner: SCI Odeon). Our experts were responsible for the impressive design of the retaining system of the 72 m deep excavation below the tower. Click here to view paper.

For more architectural and special structure references visit www.tractebel-engineering-gdfsuez.com.

 

More information

Xavier Thollard, CHPG Project Leader, Tractebel Engineering