the foundation of jinmao building is more than 19 meters deep! Covering 2, square meters.

The foundation of the World Financial Center is 8 meters deep, which is equivalent to burying the whole international hotel and resisting a strong earthquake of magnitude 8.

Fan Qingguo, a professor-level senior engineer of Shanghai Construction Engineering Group Corporation: For me, the risk comes from challenging construction projects. The most dangerous foundation construction of Jinmao Building. How deep is the foundation of Jinmao Building? More than 19 meters! Covering 2, square meters, which is unprecedented in China. At that time, many foreign construction companies threatened that you would "disarm" within three months. When digging down to 17 meters, something happened! The groundwater rushed out of the surface due to the decrease of the upper soil pressure, and the nozzle rushed bigger and bigger, and there was a Wang Yang everywhere. Coupled with the bad weather, it rained cats and dogs for several days, and the whole foundation pit was in danger of collapse. At that time, I was so nervous that my legs were weak. Did I destroy the reputation of Construction Engineering Group I? At this time, Academician Ye Keming, the chief engineer of the group, came to the scene and experts from all walks of life jointly tackled the problem. When I finally blocked the spout, it was plum blossom in Shanghai, and the sun was shining. I was sweating all over, so cool! What about earthquake prevention? The 492-meter-long Shanghai World Financial Center plunged into the clouds with one pillar. How to be as safe as a rock is afraid to take a lot of thought. "In fact, ultra-high buildings are more earthquake-resistant because the foundation is also ultra-deep." Xing Tonghe, an architect, took the 1995 Sakamoto earthquake in Japan as an example. Most of the buildings collapsed were multi-storey buildings with tens of meters high, but the super-high buildings with hundreds of meters stood still. "The foundation of the World Financial Center is 8 meters deep, which is equivalent to burying the entire international hotel. It is resistant to a strong earthquake of magnitude 8 and the standard of once in a thousand years. Don't worry." Regarding the problem of soil quality and foundation, I think you can look at this website-Shanghai Geological Survey and Research Institute.