Journal of Shanghai Jiao Tong University ›› 2022, Vol. 56 ›› Issue (6): 701-709.doi: 10.16183/j.cnki.jsjtu.2021.366

Special Issue: 《上海交通大学学报》“新型电力系统与综合能源”专题(2022年1~6月)

• New Type Power System and the Integrated Energy • Previous Articles     Next Articles

Calculation Method of Uplift Capacity of Pile-Anchor Composite Foundation and Influence of Parameters

SUN Yizhou1, SUN Honglei2(), CAI Yuanqiang1,2   

  1. 1. College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China
    2. College of Civil Engineering, Zhejiang University of Technology, Hangzhou 310014, China
  • Received:2021-09-23 Online:2022-06-28 Published:2022-07-04
  • Contact: SUN Honglei


In view of the extensive geology of overlying soil and underlying rock in mountainous areas, a pile-anchor composite foundation has been used in transmission line tower engineering. To reveal the uplift bearing mechanism and supplement the calculation method of the uplift capacity and the bearing exertion coefficient k, the verification model of field test case was established by using the PLAXIS 3D finite element software to study this problem. Parameter studies were conducted on this foundation. The influence of elastic modulus and cohesion of rock and soil and foundation condition on coefficient k was studied. The results show that there is asynchronism of ultimate uplift limit state of upper and lower parts of the pile-anchor foundation. The bearing ratio and coefficient k of the upper and lower parts of the foundation are related to geology and foundation structure. In combination with the parameter study and the relevant analytical solution of the relationship between the uplift load and the displacement, a theoretical calculation method of the coefficient k considering the foundation weight was proposed. Three test cases were used to perform confirmatory calculations for this method. By comparing with field tests and numerical calculation results, the correctness of this method has been verified. This method provides a theoretical reference for the design and application of this type of new foundation.

Key words: pile-anchor foundation, uplift capacity, numerical analysis, parameter research, bearing exertion coefficient

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