Location

Chicago, Illinois

Date

02 May 2013, 7:00 pm - 8:30 pm

Abstract

The Sutong Yangtze River Bridge is the longest cable-stayed bridge in the world with main span of 1088 m. The pile cap is 113.8 m by 48.1 m by 13.3 m under each pylon and the foundation is super-long large-diameter drilled pile groups consisting of 131 piles with the length of 114/117 m and the diameter of 2.8/2.5m. This paper presents the static loading tests on single piles, centrifugal model tests on pile groups, finite element analysis, cap model tests and field monitoring for the super-large scale pile foundation. The results show that: the super-long large-diameter bored pile of Sutong Bridge is floating piles, and it is difficult for the resistance at pile bottom to play. based on the comprehensive consideration of theoretical calculation, centrifugal model tests and finite element analysis, the pile group effect coefficient of the Sutong Yangtze Bridge is 0.82. The pile-head load distribution of pile foundation under main bridge pylon presents a “W” shape, which is larger at both the edges and intermediate connection and smaller at other position of pylon. According to the results of cap model tests, the soften-coordinated spatial truss model was suitable for the stress analysis of cap. The calculated results agree well with the field monitoring results.

Department(s)

Civil, Architectural and Environmental Engineering

Meeting Name

7th Conference of the International Conference on Case Histories in Geotechnical Engineering

Publisher

Missouri University of Science and Technology

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

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

A Case History of Super-Large Scale Bridge Pile Foundation in Soft Soil

Chicago, Illinois

The Sutong Yangtze River Bridge is the longest cable-stayed bridge in the world with main span of 1088 m. The pile cap is 113.8 m by 48.1 m by 13.3 m under each pylon and the foundation is super-long large-diameter drilled pile groups consisting of 131 piles with the length of 114/117 m and the diameter of 2.8/2.5m. This paper presents the static loading tests on single piles, centrifugal model tests on pile groups, finite element analysis, cap model tests and field monitoring for the super-large scale pile foundation. The results show that: the super-long large-diameter bored pile of Sutong Bridge is floating piles, and it is difficult for the resistance at pile bottom to play. based on the comprehensive consideration of theoretical calculation, centrifugal model tests and finite element analysis, the pile group effect coefficient of the Sutong Yangtze Bridge is 0.82. The pile-head load distribution of pile foundation under main bridge pylon presents a “W” shape, which is larger at both the edges and intermediate connection and smaller at other position of pylon. According to the results of cap model tests, the soften-coordinated spatial truss model was suitable for the stress analysis of cap. The calculated results agree well with the field monitoring results.