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Abstract

Single-side loading of pile foundations in karst areas may cause ground subsidence, lateral displacement of piles, and even engineering accidents. Revealing the loading effect is beneficial for maintaining pile safety and guiding engineering decisions. This paper employed Abaqus to build a model for pile-soil interaction in karst areas and reveal the single-side loading effect of pile foundations in karst areas, thus providing a basis for pile foundation design and single-side loading decision-making in karst areas. The results show that under the action of single-side loading, the sedimentation and lateral displacement at the pile top increase with the rising single-side loading. Under the same single-side loading capacity, the pile top sedimentation, peak lateral displacement, and peak bending moment of the soil layer pile decrease with the growing loading distance. The lateral displacement at the pile top, peak soil pressure before and after the pile, and peak axial force of the pile decrease exponentially with the increasing loading distance. As the loading distance increases, the p-y curve becomes easier to converge. Under the loading distance of less than 4 m, the most dangerous section is at 1/4 and 1/2 of the soil depth, while under the loading distance more than 4 m, the most dangerous section is at the soil rock interface. The influence of karst caves of the pile on the pile top sedimentation, lateral displacement, internal force, soil pressure before and after the pile, and p-y curve of socketed piles is not significant.

Publication Date

1-18-2024

DOI

10.14048/j.issn.1671-2579.2023.06.005

First Page

27

Last Page

32

Submission Date

March 2025

Reference

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