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Negative pressure consolidation of silt inside bucket foundation

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Abstract

A series of model experiments of bucket foundations concerning suction installation and negative pressure consolidation in saturated silt were carried out in a cube steel bin at Tianjin University. The experimental results show that the silt inside the bucket has been strengthened by negative pressure, and the strengthening effect decreases with the increase of the distance from the bucket. A three-dimensional numerical model of the experiments was built by means of finite element software ABAQUS with fluid-solid coupling method. The results show that the bearing capacity of the silt inside the bucket foundation increases significantly at the former stage of negative pressure consolidation, while the increasing trend slows down over time. The rotation centers of the bucket foundation and the inner soil region tend to be closer to each other based on the consolidation. The bearing capacity of the bucket foundation is improved effectively with the increase of soil strength. The effects of negative pressure consolidation on the bearing capacity of bucket foundation were also illustrated by an actual offshore wind power project case.

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Authors and Affiliations

  1. State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin, 300072, China

    Hongyan Ding  (丁红岩) & Puyang Zhang  (张浦阳)

  2. Key Laboratory of Coast Civil Structure Safety(Tianjin University), Ministry of Education, Tianjin, 300072, China

    Hongyan Ding  (丁红岩) & Puyang Zhang  (张浦阳)

  3. School of Civil Engineering, Tianjin University, Tianjin, 300072, China

    Hongyan Ding  (丁红岩), Yonggang Liu  (刘永刚) & Puyang Zhang  (张浦阳)

Authors
  1. Hongyan Ding  (丁红岩)
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  2. Yonggang Liu  (刘永刚)
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  3. Puyang Zhang  (张浦阳)
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Corresponding author

Correspondence to Puyang Zhang  (张浦阳).

Additional information

Supported by the National Natural Science Foundation of China (No. 51379142), International S&T Cooperation Program of China (No. 2012DFA70490), and Tianjin Municipal Natural Science Foundation (No. 13JCYBJC19100 and No. 13JCQNJC06900).

Ding Hongyan, born in 1963, male, Dr, Prof.

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Ding, H., Liu, Y. & Zhang, P. Negative pressure consolidation of silt inside bucket foundation. Trans. Tianjin Univ. 21, 333–340 (2015). https://doi.org/10.1007/s12209-015-2475-z

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  • DOI: https://doi.org/10.1007/s12209-015-2475-z

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