Impedance of Inner Saturated Soil to Horizontally Vibrating Large-Diameter Pipe Piles

Jiang Xie,Yujing Jiang

doi:10.1155/2021/1845109

Abstract

An analytical solution for the inner soil impedance of saturated soil to a horizontally vibrating large-radius pipe pile was presented. Based on the porous media theory and the assumption that the vertical normal stress is zero, the closed solution of the inner soil impedance of the saturated soil to the movement of the large-diameter pipe pile is obtained. This analytical solution considers the influence of saturated soil parameters on the impedance of the core soil of large-diameter pipe piles. Through numerical examples, the variation law of the inner soil impedance with pile radius, pile length, dimensionless frequency, compression coefficient, effective permeability coefficient, and porosity was analyzed and the pile radius corresponding to effective inner soil impedance is determined.

Highlights

Pile foundations have been used to transfer structural loads to soil layers, and the soil layers provide reaction force to the piles through the occurrence of small deformations
Shock and Vibration is work addresses the problem of the inner soil impedance of saturated soil to a horizontally vibrating largediameter pipe pile. e closed solution of the internal soil impedance for the saturated soil to the movement of the large-diameter pipe pile is obtained
I 0 n πμ􏽘Rm(ω)Wm(ω)sin amz􏼁, i 0 where Rm (ω) is the inner soil impedance factor associated with the m-th soil mode. e expression for Rm (ω) is shown as follows: Rm(ω) −

Summary

Introduction

Pile foundations have been used to transfer structural loads to soil layers, and the soil layers provide reaction force to the piles through the occurrence of small deformations. E pile side and pile inner soil provide the reaction force to the large-diameter pipe pile to bear the horizontal external load. Zheng et al [8, 9] give the calculation models of the inner soil impedance of the pile under vertical and horizontal loads, respectively. Based on the calculation model of Biot’s theory, Yu et al [12] and Zheng et al [13] studied the dynamic characteristics of end-bearing piles and pipe piles embedded in saturated soil under horizontal vibration. In the research of saturated soil and piles, Cao gives an analytical solution for the resistance of saturated soil on the side of the pile based on the normal stress assumption [16]. Shock and Vibration is work addresses the problem of the inner soil impedance of saturated soil to a horizontally vibrating largediameter pipe pile. e closed solution of the internal soil impedance for the saturated soil to the movement of the large-diameter pipe pile is obtained

General Consideration

Model Development

Results and Discussion