Shear behaviour of sand-concrete interface with side post-grouting considering the unloading effect

Side post-grouting bored-pile foundations are widely used in geotechnical engineering. However, few studies have focused on analyzing the shear behaviour of soil and concrete while considering the grouting process. A total of 48 groups of self-developed, large-scale direct shear experiments were con...

Full description

Saved in:
Bibliographic Details
Published in:Soils and foundations 2020-12, Vol.60 (6), p.1440-1449
Main Authors: Fei, Yi, Yasufuku, Noriyuki, Zhao, Chunfeng, Zhao, Cheng, Xu, Kai
Format: Article
Language:English
Subjects:
Bored-pile foundation
Interface roughness
Large-scale shear experiment
Radial stress unloading
Side post-grouting
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Side post-grouting bored-pile foundations are widely used in geotechnical engineering. However, few studies have focused on analyzing the shear behaviour of soil and concrete while considering the grouting process. A total of 48 groups of self-developed, large-scale direct shear experiments were conducted to investigate the shear behaviour of sand-concrete interface with side-grouting, focusing on the effect of soil stress unloading and the on-site roughness measurements of bored pile. The influence of the grouting volume V, unloading rate α and interface roughness R on the shear behaviour are discussed, and the grouting modes and shear band deformation are investigated. The experimental results indicated that the grouting volume has a limited effect on improving the shear strength, and an optimal grout quantity will exist in post-grouting engineering. In addition, the unloading has a non-negligible influence on the grouting modes.
ISSN:0038-0806
DOI:10.1016/j.sandf.2020.09.002