TY - JOUR
T1 - A new large step-tapered hollow pile and its bearing capacity
AU - Jiang, Song
AU - Huang, Ming
AU - Fang, Tao
AU - Chen, Wei
AU - Shangguan, Xing
N1 - Publisher Copyright:
© 2020 ICE Publishing. All rights reserved.
PY - 2020/6/1
Y1 - 2020/6/1
N2 - This paper introduces a new large step-tapered hollow (STH) pile used in a karst area and its construction method. To reveal the advantages of this pile type, a 15 m dia. STH pile in Ji'an Shenzhen Bridge was simulated using Flac3D software. The vertical bearing capacity was assessed by considering the influences of the width and number of the variable cross-sections and the soil characteristics around the pile. In addition, new large STH piles of two different forms were assessed to expand the practical application of such piles. The results showed that, for a large-diameter pile, the concrete utilisation rate and the vertical bearing capacity of the pile were improved by the design of hollow and variable cross-sections. The optimal range of the taper angle for the large STH pile was found to be 2.68-5.36° and the optimal number of variable cross-sections was found to be between two and four. The bearing capacity increased with an increase in the soil shear strength parameters and the pile was deemed suitable for stiff strata. The results of this work could facilitate design practice for large STH piles.
AB - This paper introduces a new large step-tapered hollow (STH) pile used in a karst area and its construction method. To reveal the advantages of this pile type, a 15 m dia. STH pile in Ji'an Shenzhen Bridge was simulated using Flac3D software. The vertical bearing capacity was assessed by considering the influences of the width and number of the variable cross-sections and the soil characteristics around the pile. In addition, new large STH piles of two different forms were assessed to expand the practical application of such piles. The results showed that, for a large-diameter pile, the concrete utilisation rate and the vertical bearing capacity of the pile were improved by the design of hollow and variable cross-sections. The optimal range of the taper angle for the large STH pile was found to be 2.68-5.36° and the optimal number of variable cross-sections was found to be between two and four. The bearing capacity increased with an increase in the soil shear strength parameters and the pile was deemed suitable for stiff strata. The results of this work could facilitate design practice for large STH piles.
KW - Concrete structures
KW - Geotechnical engineering
KW - Piles & piling
UR - http://www.scopus.com/inward/record.url?scp=85084827951&partnerID=8YFLogxK
U2 - 10.1680/jgeen.19.00009
DO - 10.1680/jgeen.19.00009
M3 - Article
AN - SCOPUS:85084827951
SN - 1353-2618
VL - 173
SP - 191
EP - 206
JO - Proceedings of the Institution of Civil Engineers: Geotechnical Engineering
JF - Proceedings of the Institution of Civil Engineers: Geotechnical Engineering
IS - 3
ER -