Study on the Effect of Cement Graded Gravel Pile on Treating Loess Foundation

DOI

10.2991/978-94-6463-336-8_52How to use a DOI?

Keywords

Cement graded crushed stone compaction pile; Foundation settlement; Bearing capacity; Numerical simulation; Composite foundation; Pile-soil stress ratio; CFG pile; Cushion; Frictional resistance

Abstract

In the context of existing transportation operations, cement-graded crushed stone compaction piles are used as a treatment method to address the damage caused by the infiltration of the lower layer of the loess foundation. By conducting numerical simulation analysis on this semi-rigid composite foundation and establishing models with different pile lengths and diameters, the variation pattern of the bearing capacity of the foundation is obtained. As the pile length increases, the settlement of the foundation decreases, the maximum stress of the pile body increases, and the stress at the pile end decreases; the increase in pile diameter increases the contact area between the pile and the foundation soil, increases the stress at the pile top, and similarly reduces the stress at the pile end; the cushion thickness has a significant impact on the bearing capacity of the composite foundation. The stress of the pile body changes significantly, and the smaller the thickness is, the greater the stress at the top of the pile is, while the stress at the pile body decreases. As the thickness of the cushion layer increases, the effect on the ratio of pile stress to soil stress is not significant, and to some extent, it also increases the cost. In practical engineering, its choice is not economical. Based on numerical simulation analysis of composite foundations, it provides a certain reference for the design selection and optimization of practical engineering in the future.

Copyright

© 2023 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Guoxu Zhou
AU  - Zhijun Huang
AU  - Wei Chen
AU  - Yongguan Wan
AU  - Yuting Song
AU  - Ersheng Zhao
PY  - 2023
DA  - 2023/12/30
TI  - Study on the Effect of Cement Graded Gravel Pile on Treating Loess Foundation
BT  - Proceedings of the 2023 9th International Conference on Architectural, Civil and Hydraulic Engineering (ICACHE 2023)
PB  - Atlantis Press
SP  - 444
EP  - 452
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-336-8_52
DO  - 10.2991/978-94-6463-336-8_52
ID  - Zhou2023
ER  -