> Technology
  Data Source Joints, Bearings and Seismic S   Name(Date) Britec(2012-10-07)
  File Download  355_2006_-_The_Expansion_Joints_for_Runway_D_of_the_Haneda_Airport.pdf(4004KB)   Download No 365

The extension of the Haneda Airport represents one of the biggest civil engineering jobs currently
under execution worldwide. It consists mainly in the realization of a fourth runway that, due to lack
of space in the land, is built partly on a reclaimed island and partly on a piled elevated platform over
the sea, for a total length of 3120 m. The new runway is connected to the existing Haneda Airport
through a Taxiway Bridge of 650 m length that is also a sea structure supported by piles.
The different parts of the structure – reclaimed island, piled elevated platform and taxiway bridge -
are connected by expansion joints that must provide bearing capacity for the aircrafts taking off,
landing and taxiing, movement capacity to accommodate thermal effect, creep, shrinkage and
earthquake movements, and waterproofing. In total are required 1104 m of expansion joints.
Design loads for the expansion joints include impact and braking forces for any kind of aircraft
(including the Airbus A 380) for normal as well as emergency landing; for movements from all
effects up to 1200 mm in all directions.
The design of the expansion joints, taking consideration of the very high loads which involve also
fatigue effects, has been based on the all metal solution of the “roller shutter” type that has already
proved to be suitable, albeit for smaller movements and loads, for another airport runway in
Funchal, Madeira where the joints have been in service since 5 years.
The design has been validated also by a full scale model test performed on a specimen of three
meter length. The specimen has been installed on a 2 degrees of freedom shaking table at ALGA
laboratory and subjected to 24 different time histories reproducing earthquakes in the x, y and x-y
directions with maximum displacements of 1200 mm in the two directions. In the earthquake
simulations, velocities up to 1,5 m/s with accelerations up to 0,8g have been applied to the
specimen. The tests have been completed for static loads simulating impact and braking, as well as
for dynamic loads simulating fatigue effects for a total number of cycles of 12,5 million. All tests
have been successful and proved the suitability of the design.
The paper describes the airport extension