Analysis of effect of grouting micro⁃pile strengthening subgrade based on heterogeneous layer model

Authors

ZHOU Ke, Hubei Key Laboratory of Disaster Prevention and Mitigation (China Three Gorges University), Yichang, Hubei 443002, China; College of Civil Engineering and Architecture, China Three Gorges University, Yichang, Hubei 443002, ChinaFollow
LEI Jinsheng, Hubei Key Laboratory of Disaster Prevention and Mitigation (China Three Gorges University), Yichang, Hubei 443002, China; College of Civil Engineering and Architecture, China Three Gorges University, Yichang, Hubei 443002, ChinaFollow
LIU Jinxin, College of Civil Engineering and Architecture, China Three Gorges University, Yichang, Hubei 443002, China
LIU Wanchun, College of Civil Engineering and Architecture, China Three Gorges University, Yichang, Hubei 443002, China
SHI Zhiqiang, College of Civil Engineering and Architecture, China Three Gorges University, Yichang, Hubei 443002, China
DANG Runmeng, College of Civil Engineering and Architecture, China Three Gorges University, Yichang, Hubei 443002, China

Abstract

In view of subgrade sedimentation and other hazard control problems of road subgrade diseases, this paper considered the spatial heterogeneity of soil parameters of subgrade with diseases and analyzed the characteristics of grouting micro⁃pile strengthening subgrade. Meanwhile, based on the stochastic fractal search algorithm, it generated a random distribution profile of voidage, elastic modulus, and permeability coefficient, built a heterogeneous formation model, and simulated grouting diffusion in the subgrade. According to the calculation results of grouting diffusion, the effect of grouting micro-piles on strengthening subgrade was analyzed. The results show that due to the uneven distribution of geophysical parameters, the diffusion boundary and solidification area of the grouting slurry are irregularly distributed. Filling the soil pores around the pile with slurry, and conducting hardening and cementing to form a stone body can significantly improve the physical and mechanical properties of the soil around the piles, and increase the frictional resistance at the pile side and resistance at the pile end. Additionally, the subgrade strengthened by grouting micro-piles significantly reduces displacement and sedimentation under load, and the bearing capacity of the subgrade is significantly improved after strengthening.

Publication Date

1-18-2024

DOI

10.14048/j.issn.1671-2579.2023.06.002

First Page

8

Last Page

14

Submission Date

March 2025

Recommended Citation

Ke, ZHOU; Jinsheng, LEI; Jinxin, LIU; Wanchun, LIU; Zhiqiang, SHI; and Runmeng, DANG (2024) "Analysis of effect of grouting micro⁃pile strengthening subgrade based on heterogeneous layer model," Journal of China & Foreign Highway: Vol. 43: Iss. 6, Article 57.
DOI: 10.14048/j.issn.1671-2579.2023.06.002
Available at: https://zwgl1980.csust.edu.cn/journal/vol43/iss6/57

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