Large diameter laterally loaded piles in sand: Numerical evaluation of soil stress paths and relevance of laboratory soil element testing

被引：6

作者：

Cheng, Xiaoyang ^{[1
]}

Ibraim, Erdin ^{[1
]}

Liu, Haoyuan ^{[2
]}

Pisano, Federico ^{[3
]}

Diambra, Andrea ^{[1
]}

机构：

[1] Univ Bristol, Dept Civil Engn, Bristol BS8 1QU, Avon, England

[2] Norwegian Geotech Inst, Sognsveien 72, N-0806 Oslo, Norway

[3] Delft Univ Technol, Fac Civil Engn & Geosci, NL-2628 CN Delft, Netherlands

来源：

COMPUTERS AND GEOTECHNICS | 2023年 / 154卷

关键词：

Large-diameter pile; Stress path; Monotonic loading; Laboratory element testing; Finite element; DEFORMATION; ROTATION;

D O I：

10.1016/j.compgeo.2022.105139

中图分类号：

TP39 [计算机的应用];

学科分类号：

081203 ; 0835 ;

摘要：

This paper uses 3D numerical analyses to investigate the stress path experienced by soil elements around large diameter piles in sand subjected to monotonic drained lateral loading. Inspection of the loading-induced stresses in the soil revealed the multiaxial nature of these stress paths, which are characterised by rotation of one or more principal stress axes. Based on the outcome of the finite element analyses, typical stress paths for different soil elements around the piles are extracted. Such stress paths are then evaluated against those enabled by conventional and advanced laboratory soil element testing. It is found that a combination of tests in the Hollow Cylinder Torsional Apparatus (HCTA) can reproduce most features of the numerically identified stress paths for soil elements around the pile. Unavoidable limitations in laboratory testing are discussed as well as the major challenge in replicating the loading direction with respect to the material axes. Some guidance for the experimental implementation of these stress paths in the HCTA are provided as well as a discussion on the use of conventional experimental equipment, such as the conventional triaxial or simple shear apparatus.

引用

页数：13