Location

Chicago, Illinois

Session Start Date

4-29-2013

Session End Date

5-4-2013

Abstract

The China Central Television (CCTV) New Headquarter is situated in Chaoyang District of Beijing. It consists of two main towers and podiums. The bored piles with diameter of 1200mm and single pile bearing capacity of 11000kN were chosen for the towers. Through the combination of pile-end and shaft grouting, as well as in-situ bearing capacity tests of piles with different pile length, the pile length, the costs and construction difficulties were reduced considerably. Based on the concept of interactions among the superstructure, the foundation raft, the piles and soils, calculations and analysis were carried out on the design of the piles and raft, ensuring the settlements and internal forces be kept at allowable levels. The piles were unevenly distributed below the raft to meet the requirements on settlements, internal forces and tilt control. The maximum thickness of the raft is controlled by the shear strength of the raft. The raft thickness varied from the maximum 7m (Tower 1) and 6m (Tower 2) to the minimum 4.5m.Field monitoring of the settlements, internal forces of raft, reaction forces at pile tops, water and earth pressures etc. was carried out during the construction process. The data of field settlement measurements were then studied.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conference on Case Histories in Geotechnical Engineering

Meeting Name

Seventh Conference

Publisher

Missouri University of Science and Technology

Publication Date

4-29-2013

Document Version

Final Version

Rights

© 2013 Missouri University of Science and Technology, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

Share

 
COinS
 
Apr 29th, 12:00 AM May 4th, 12:00 AM

Foundation Design and Settlement Measurement of CCTV New Headquarter

Chicago, Illinois

The China Central Television (CCTV) New Headquarter is situated in Chaoyang District of Beijing. It consists of two main towers and podiums. The bored piles with diameter of 1200mm and single pile bearing capacity of 11000kN were chosen for the towers. Through the combination of pile-end and shaft grouting, as well as in-situ bearing capacity tests of piles with different pile length, the pile length, the costs and construction difficulties were reduced considerably. Based on the concept of interactions among the superstructure, the foundation raft, the piles and soils, calculations and analysis were carried out on the design of the piles and raft, ensuring the settlements and internal forces be kept at allowable levels. The piles were unevenly distributed below the raft to meet the requirements on settlements, internal forces and tilt control. The maximum thickness of the raft is controlled by the shear strength of the raft. The raft thickness varied from the maximum 7m (Tower 1) and 6m (Tower 2) to the minimum 4.5m.Field monitoring of the settlements, internal forces of raft, reaction forces at pile tops, water and earth pressures etc. was carried out during the construction process. The data of field settlement measurements were then studied.