Lateral Dynamic Response of Helical Pile in Viscoelastic Foundation Considering Shear Deformation

Author:

Yang Xiaoyan12,Wang Chaozhe2,Cao Sheng23,Wang Fengxi23,Wu Wenbing23ORCID

Affiliation:

1. School of Physics and Mechanical & Electrical Engineering, Hubei University of Education, Wuhan 430205, China

2. Engineering Research Centre of Rock–Soil Drilling & Excavation and Protection, Ministry of Education, Zhejiang Institute, China University of Geosciences, Wuhan 430074, China

3. China Railway 16th Bureau Group No. 3 Engineering Co., Ltd., Huzhou 313000, China

Abstract

Helical piles are a new type of pile that has good application prospects, and researchers have carried out an in-depth investigation into their vertical uplift and compressive bearing capacity. However, there is relatively little research on the dynamic bearing characteristics of helical piles. Therefore, the lateral vibration of a helical pile embedded in the viscoelastic foundation is systematically studied in this article. Utilizing the equivalent stiffness method to transform a helical pile into a cylindrical pile of special diameter, the lateral vibration model of the helical pile considering shear deformation is established based on the Winkler foundation model and the Timoshenko beam theory. The analytical solutions for the lateral dynamic displacement, bending moment, and shear force of the helical pile are strictly derived, and the rationality of the present solutions is also verified by comparing them with existing solutions. Based on the present solutions, a parametric study is carried out to investigate the influence of the pile and soil properties on the lateral dynamic response of the helical pile. It is found that the load excitation frequency and pile–soil stiffness ratio have a significant influence on the lateral dynamic displacement, bending moment, and shear force of the helical pile with space and time response.

Funder

National Natural Science Foundation of China

Research Project of Engineering Research Centre of Rock-Soil Drilling and Excavation and Protec-tion, Ministry of Education

Natural Science Foundation of Hubei Province of China

Outstanding Youth Project of Natural Science Foundation of Zhejiang Province

China Postdoctoral Science Foundation Funded Project

Zhejiang Province’s 2022 Key R&D Plan Project-’Lingyan’ Project

Science and Technology Project of Zhejiang Provincial Communication Department

Construction Research Founds of Department of Housing and Urban–Rural Development of Zhejiang Province

Publisher

MDPI AG

Subject

Fluid Flow and Transfer Processes,Computer Science Applications,Process Chemistry and Technology,General Engineering,Instrumentation,General Materials Science

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