Basement structural design innovation of China International Silk Road Center

Abstract

For super high‐rise buildings with a height of more than 400 m, differential settlement control of foundation is a crucial aspect in structural design. In previous engineering cases, except that the foundation or piles can be directly supported on bedrock, basement wing walls were commonly used to coordinate the differential settlement of foundation between the perimeter columns and the core. However, wing walls could also have negative effects on the basement usage. This article studied and compared the effects of arranging basement wing walls and adjusting pile length on differential settlement of the foundation. The scheme of adjusting pile length considering the interaction between piles, foundation, and superstructure was proposed to control differential settlement of the foundation, and the effectiveness of canceling basement wing walls was verified. Subsequently, a calculation program was developed to automatically optimize pile lengths by region. Finally, the above achievements were applied to the project of China International Silk Road Center Building with a building height of 498 m, making it the tallest building in China located on nonrock stratum and without basement wing walls.