中国海洋大学学报（自然科学版）2024，Vol.54Issue(2)：114-120,7.DOI:10.16441/j.cnki.hdxb.20220474
未胶结钙质砂中表面基础承载力研究
Bearing Capacity of Surface Footing in Uncemented Calcareous Sand
摘要
Abstract
The capacity and deformation behaviors of calcareous sand are distinguished from silica sand due to their fundamental differences on the shape,mineral of soil particles and inner pore.A series of plate loading tests,large deformation finite element simulations and drained triaxial tests were conduc-ted on the uncemented calcareous sand in South China Sea to obtain the bearing and mechanical proper-ties.The stress-settlement curves were obtained by the plate loading tests,which found that the particle breakage around the surface footing was negligible.The Abaqus finite element package utilizing the Cou-pled Eulerian-Lagrangian method was used to simulate the footing load tests and the Mohr-Coulomb model was incorporated to describe the behavior of calcareous sand.Drained triaxial tests were used to determine the parameters of the constitutive model.The numerical model was verified by the plate load-ing test to be reliable and then the effects of the relative density and footing diameter on footing capacity were investigated by varying parameters tests.The result shows that the bearing capacities were in-creased with the increase of footing diameter in the form of a power function.The predicted formulas of allowable bearing capacity and ultimate bearing capacity varying with footing diameter were summa-rized.关键词
钙质砂/表面基础/模型试验/颗粒破碎/大变形有限元Key words
calcareous sand/surface footing/model test/particle breakage/large deformation finite element分类
建筑与水利引用本文复制引用
张永涛,王晓丽,陈培帅,罗会武,王栋,裴会敏..未胶结钙质砂中表面基础承载力研究[J].中国海洋大学学报（自然科学版）,2024,54(2):114-120,7.基金项目
湖北省科技厅高端外国专家项目(2021EJD012) （2021EJD012）
中国交通建设股份有限公司科技研发项目(2018ZJKJPTJS02)资助Supported by the High end Foreign Expert Project of Hubei Provincial Science and Technology Department(2021EJD012) （2018ZJKJPTJS02）
the Science and Technology Research and Development Project of China Communications Construction Company Limited(2018ZJKJPTJS02) （2018ZJKJPTJS02）
