A Milestone in Supertall Construction
Ping An Finance Center (PAFC) is an extraordinary project, which responds to the challenges of constructing in dense urban environments. PAFC advanced nearly every dimension of supertall construction technology, including deep excavation, large-diameter piling, ultra-high concrete pumping, steel erection, and structural health monitoring. Notwithstanding the magnitude and speed of construction, the project was realized without any major worker injuries.
PAFC required deep foundations, which were constructed adjacent to Shenzhen Metro Line 1. To limit displacement of the subway tunnel to within 10 millimeters, an innovative cross-lot bracing system with two-large diameter rings allowed for construction of the tower core through the first ring, and removal of 520,000 cubic meters of earth through the second ring. Giant-diameter hand-dug caissons, measuring eight meters across, were extended down to bedrock at a depth of 33.5 meters. PAFC’s superstructure, designed to meet stringent seismic codes, incorporated massive steel connections which were pre-fabricated and installed in major sections weighing up to 90 metric tons. Construction of the tower’s eight megacolumns was expedited by using climbing formwork arranged in five adjustable positions, with each layer designed to be retractable and able to ascend on an incline.