Analysis on influence factors of swelling deformation of gravel pile in soft soil area based on orthogonal numerical test

Authors

FAN Liujun, Zhengzhou University of Science and Technology, Zhengzhou, Henan 450064, China; 2. Zhengzhou Key Laboratory of Geocomposite Materials, Zhengzhou, Henan 450064, ChinaFollow
LU Xiaoming, Zhengzhou University of Science and Technology, Zhengzhou, Henan 450064, China; 2. Zhengzhou Key Laboratory of Geocomposite Materials, Zhengzhou, Henan 450064, China
MIAO Peng, Zhengzhou University of Science and Technology, Zhengzhou, Henan 450064, China

Abstract

The gravel pile composite foundation is usually accompanied by swelling deformation when vertical settlement deformation occurs. The research on the swelling deformation characteristics and influencing factors of gravel pile composite foundations is of great importance for analyzing the settlement rule and deformation mechanism of gravel pile composite foundations. Based on an orthogonal numerical test, this paper used the finite element software Midas GTS to analyze the main influencing factors of the swelling deformation of the gravel pile and used range and variance analysis to analyze the sensitivity and significance of each influencing factor. Finally, through regression analysis, the optimized swelling deformation formula was obtained. The results show that the elastic modulus of soft soil, as well as the cohesion and displacement rate of gravel pile, has significant effects on the maximum swelling strain. The cohesion and displacement rate of soft soil have a significant influence on the maximum swelling depth. The elastic modulus and displacement rate of soft soil have a significant influence on the swelling deformation length. The mechanical parameters of gravel piles have little influence on the swelling deformation characteristics. The single factor analysis shows that when the elastic modulus of soft soil is small, increasing the elastic modulus can effectively reduce the maximum swelling strain and swelling deformation length. The increase in cohesion of soft soil can reduce the maximum swelling strain, and the maximum swelling position moves down to a certain extent, or in other words, the failure point of the gravel pile moves down.

Publication Date

3-17-2023

DOI

10.14048/j.issn.1671-2579.2023.01.004

First Page

25

Last Page

30

Submission Date

March 2025

Recommended Citation

Liujun, FAN; Xiaoming, LU; and Peng, MIAO (2023) "Analysis on influence factors of swelling deformation of gravel pile in soft soil area based on orthogonal numerical test," Journal of China & Foreign Highway: Vol. 43: Iss. 1, Article 4.
DOI: 10.14048/j.issn.1671-2579.2023.01.004
Available at: https://zwgl1980.csust.edu.cn/journal/vol43/iss1/4