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

被引：16

作者：

Fei, Yi ^{[1
]}

Yasufuku, Noriyuki ^{[2
]}

Zhao, Chunfeng ^{[1
]}

Zhao, Cheng ^{[1
]}

Xu, Kai ^{[1
]}

机构：

[1] Tongji Univ, Dept Geotech Engn, Shanghai 200092, Peoples R China

[2] Kyushu Univ, Dept Civil Engn, Fukuoka 8190395, Japan

来源：

SOILS AND FOUNDATIONS | 2020年 / 60卷 / 06期

基金：

国家重点研发计划; 中国国家自然科学基金;

关键词：

Side post-grouting; Bored-pile foundation; Large-scale shear experiment; Radial stress unloading; Interface roughness;

D O I：

10.1016/j.sandf.2020.09.002

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

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 a 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. (C) 2020 Production and hosting by Elsevier B.V. on behalf of The Japanese Geotechnical Society.

引用

页码：1440 / 1449

页数：10

共 23 条

[1]

[Anonymous], 2008, Technical code for building pile foundations

[2]

[Anonymous], 2007, Code for Design of Ground Base and Foundation of Highway Bridges and Culverts

[3]

Bruce D.A., 1986, Parts 1 and 2, Ground Engineering, V19, P9, DOI DOI 10.1016/0148-9062(86)92518-0

[4] A Modified Resource Distribution Fairness Measure [J].

Chen, Zhenmin .

JOURNAL OF MATHEMATICS, 2013, 2013

[5]

Gómez JE, 2008, GEOTECH TEST J, V31, P358, DOI 10.1520/GTJ100220

[6]

Ho C.E., 2003, Grouting and Ground Treatment, P716

[7] METHODS OF IMPROVING THE PERFORMANCE OF DRILLED PIERS IN WEAK ROCK [J].

HORVATH, RG ;

KENNEY, TC ;

KOZICKI, P .

CANADIAN GEOTECHNICAL JOURNAL, 1983, 20 (04) :758-772

[8]

Li Y.H., 2013, BEARING BEHAV CALCUL

[9]

Li YH, 2015, ROCK SOIL MECH, V36, P1981, DOI 10.16285/j.rsm.2015.07.020

[10]

[刘福天 LIU Futian], 2010, [岩石力学与工程学报, Chinese Journal of Rock Mechanics and Engineering], V29, P858

← 1 2 3 →