@article{Li2025, 
author = {Zhongbao Li and Bo Wang and Yuanchun Zong and Shuai Yuan},
title = {Modeling and Shear Characteristics of Pile-Soil Random Fluctuation Contact Surface},
year = {2025},
journal = {Chinese Journal of Underground Space and Engineering},
volume = {21},
number = {4},
pages = {1155-1160},
keywords = {cast-in-place pile, pile-soil contact surface, random fluctuation surface, direct shear test, shear properties},
url = {https://www.sciopen.com/article/10.20174/j.JUSE.2025.04.06},
doi = {10.20174/j.JUSE.2025.04.06},
abstract = {Monte Carlo method is used to establish a random fluctuation surface model by considering the random ups and downs characteristics of the outer surface of the cast-in-place pile. Direct shear tests of the pile-soil random fluctuation surface under different normal stress and fluctuation height are carried out. The effects of normal stress and average fluctuation height on the shear behavior of the cast-in-place pile-soil random fluctuation interface are analyzed, such as shear strength, failure mode, shear stress-displacement relationship, etc. The results show that: Radial fluctuation of the outer side of the cast-in-place pile agrees with the Gaussian distribution, and the fluctuation height is mainly concentrated in the range of 0 ~ 8% of the pile diameter. With the increase of the fluctuating height, the number of soil particles embedded in the concave part of the pile-soil interface increases. The failure mode of the pile-soil random fluctuation interface gradually develops from pile-soil interface sliding shear failure to internal shear failure of the soil. The cohesion and internal friction angle of the pile-soil random fluctuation interface also increase, and the shear stress-strain curve of the random fluctuation pile-soil random fluctuation interface gradually approached to the shear stress-strain curve of soil.}
}