Analysis of Consolidated Bearing Capacity of Shallow Foundations Based on Characteristics Method

被引：0

作者：

Li, Zhijian ^{[1
]}

Liao, Chencong ^{[1
]}

Zhang, Lulu ^{[1
]}

Ye, Guanlin ^{[1
]}

机构：

[1] 1. State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University,Shanghai 200240, China 2. Shanghai Key Laboratory for Digital Operation and Maintenance of Buildings and Infrastructure

来源：

Shanghai Jiaotong Daxue Xuebao/Journal of Shanghai Jiaotong University | 2024年 / 58卷 / 07期

关键词：

characteristics method; clay seabed; consolidated bearing capacity; preloading; shallow foundation;

D O I：

10.16183/j.cnki.jsjtu.2022.468

中图分类号：

学科分类号：

摘要：

To evaluate the bearing capacity evolution of subsea shallow foundations during operation, an undrained shear strength distribution of clay seabed following full consolidation due to preloading was deduced. The characteristics method was used to derive the stress characteristics equation and to evaluate the consolidated bearing capacity of shallow foundations. The influence of preloading ratio, soil inhomogeneity, effective internal friction angle, and foundation dimension on the consolidated bearing capacity of shallow foundations was investigated. The result shows that the relationship between the relative gain in the consolidated bearing capacity of shallow foundations and the preloading ratio is approximately linear. Meanwhile, the relative gain in consolidated bearing capacity is jointly determined by soil inhomogeneity and effective internal friction angle and is not affected by the foundation dimension individually. The accuracy and effectiveness of the proposed method were verified by comparing it with the results of soil-water coupled finite element analysis. Finally, possible errors between the characteristics solution and finite element model (FEM) results were analyzed. It was found that the discrepancy in the pore pressure calculation was the main reason for the disparity in the prediction of consolidated bearing capacity obtained by two methods. This characteristics solution can quickly and accurately predict the growth of consolidated bearing capacity of shallow foundations, which provides important reference for the optimal design of subsea shallow foundations. © 2024 Shanghai Jiaotong University. All rights reserved.

引用

页码：1047 / 1056

页数：9

共 22 条

[1] TAN Yue, WANG Chunsheng, CHEN Guolong, Recent development and application of mobile production storage platform [J], Shipbuilding of China, 52, 1, pp. 159-165, (2011)
[2] FENG X, GOURVENEC S., Consolidated undrained load-carrying capacity of subsea mudmats under combined loading in six degrees of freedom [ J ], Ceotechnique, 65, 7, pp. 563-575, (2015)
[3] KINOSHITA M, TOBIN H, ASHI J, Et al., Data report: Permeability, compressibility, stress state, and grain size of shallow sediments from Sites C0004, C0006, C0007, and C0008 of the Nankai accretionary complex, Proceedings of the Integrated Ocean Drilling Program, pp. 1-11, (2011)
[4] TANIKAWA W, HIROSE T, HAMADA Y, Et al., Porosity, permeability, and grain size of sediment cores from gas-hydrate-bearing sites and their implication for overpressure in shallow argillaceous formations: Results from the national gas hydrate program expedition 02, Krishna-Godavari Basin, India, Marine and Petroleum Geology, 108, pp. 332-347, (2019)
[5] CHEN Xiyou, ZENG Guoxi, GONG Xiaonan, Characteristics solution for bearing capacity of strip foundation on anisotropic and non-homogeneous soil, Journal of Zhejiang University, 3, pp. 65-74, (1988)
[6] HUANG Maosong, QIN Huilai, GUO Yuancheng, Upper bound solution for bearing capacity of clay foundation anisotropic and non-homogeneous, Chinese Journal of Rock Mechanics and Engineering, 3, pp. 511-518, (2008)
[7] HUANG Qiwu, HUANG Maosong, WANG Guihe, Calculation of bearing capacity of strip footings using lower bound limit method, Chinese Journal of Rock Mechanics and Engineering, 4, pp. 572-579, (2007)
[8] GOURVENEC S M, MANA D S K., Undrained vertical bearing capacity factors for shallow foundations, Geotechnique Letters, 1, 4, pp. 101-108, (2011)
[9] LUO Qiang, WANG Heng, Experimental study on centrifugal model of bearing capacity and deformation characteristics of shallow foundation, Journal of Dalian University of Technology, 55, 3, pp. 298-304, (2015)
[10] BRANSBY M F., The undrained inclined load capacity of shallow foundations after consolidation under vertical loads, 8th International Symposium on Numerical Models in Geomechanics, NUMOG 2002, pp. 431-437, (2002)

← 1 2 3 →