Top 10 Most Costly Construction Projects Ever
5. International Airport of Kansai
Place: Japan
Total Expense: $24 Billion*
Completed Year: 1994
The Kansai International Airport, located on a man-made island in Osaka Bay, represents one of the most ambitious engineering feats of the modern era. Construction on this remarkable project began in 1987, with the aim of creating a state-of-the-art airport to accommodate Japan's growing transportation needs.
To ensure the stability of the island, engineers employed an innovative method involving one million sand drains to consolidate the clay beneath the bay. This extensive groundwork was crucial for the island's structural integrity. Spanning 2.5 miles in length and 1.6 miles in width, the airport has since welcomed over 25 million passengers annually.
The construction contract for Kansai International Airport was awarded to Orix and Vinci SA, the sole bidders for this monumental project.
In conclusion, Kansai International Airport not only serves as a vital transportation hub but also stands as a testament to human ingenuity and engineering prowess. Its successful completion in 1994 has made it a key player in global aviation, showcasing Japan's commitment to innovation and infrastructure development.
Photo Credit: Civil Engineering Daily @Kansai International Airport / Facebook.com
The Kansai International Airport demonstrated remarkable resilience during the 1995 Kobe earthquake, largely due to its innovative seismic engineering features, including sliding joints designed to absorb and dissipate seismic forces. While these engineering solutions helped the airport withstand the earthquake, it is important to note that the structure is not impervious to damage.
Initially, it was predicted that the airport island would settle by nineteen feet, but by 1999, it had actually subsided an astonishing twenty-seven feet. In response to this unexpected shift, significant infrastructure improvements were made, including the addition of nearly eight inches of pavement to the runways and taxiways.
In conclusion, the survival of Kansai International Airport during such a significant seismic event underscores the importance of advanced engineering in modern infrastructure. The ongoing adaptations and enhancements made to the airport reflect a commitment to safety and functionality, ensuring that it remains a vital hub for international travel.
