TY - JOUR
T1 - Shear behaviour of sand-concrete interface with side post-grouting considering the unloading effect
AU - Fei, Yi
AU - Yasufuku, Noriyuki
AU - Zhao, Chunfeng
AU - Zhao, Cheng
AU - Xu, Kai
N1 - Funding Information:
The authors are grateful for the financial support for this research provided by the National Natural Science Foundation of China (Grant No. 41672265 ), National Natural Science Foundation of China (Grant No. 41272295 ), National Key R&D Program of China (Grant No. 2017YFC0806000 ), National Key R&D Program of China (Grant No. 2017YFC0805004 ) and International Exchange Program for Graduate Students of Tongji University (Grant No. 4360143301 ). The anonymous reviewers’ comments have improved the quality of this paper and are also greatly appreciated.
Publisher Copyright:
© 2020
PY - 2020/12
Y1 - 2020/12
N2 - 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.
AB - 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.
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U2 - 10.1016/j.sandf.2020.09.002
DO - 10.1016/j.sandf.2020.09.002
M3 - Article
AN - SCOPUS:85092668360
SN - 0038-0806
VL - 60
SP - 1440
EP - 1449
JO - Soils and Foundations
JF - Soils and Foundations
IS - 6
ER -