Airport authorities at the Charles B. Wheeler airport in Kansas City, MO were concerned about a leaking CMP joint 22-feet beneath the taxiway. The sand that was coming through the joint was detected on a video inspection of the culvert. They were concerned about possible voids above the leak and commissioned a geophysical survey. Two geophysical methods were used, ground penetrating radar and multi-channel analysis of surface waves (MASW). The void was detected using the methods, and subsequent excavation of the airport taxiway confirmed the presence of the voids with about the same dimensions as what was indicated by the geophysics. The work was performed by the St. Louis office of Geotechnology, Inc. [Source: CE News. Image: CE News]
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Foundations and Geotechnical Engineering for the Burj Dubai – World’s Tallest Building
The Burj Dubai Tower has recently reached it’s final height of 818m (2,684-ft or almost exactly 1/2 a mile!). The foundation system for the Burj Dubai is comprised of 192 bored piles (drilled shafts in my practice) 1.5-m (approximately 5-ft) in diameter and approximately 50-m deep (164-ft). A 3.7-m (12-ft) thick raft foundation sits on top of the piles under the full footprint of the structure. (Image from BurjDubaiSkyscraper.com)
The geotechnical investigation for the Burj Dubai (now to be known as Burj Khalifa after the UAE President) is described in detail in a paper by the geotechnical engineer of record, Grahame Bunce of Hyder Consulting (UK) and the independent technical reviewer for the geotechnical design, Harry G. Poulos of Coffey Geotechnics. Click through for the link to the paper and more details. […]