TY - JOUR
A2 - Hu, Xiaodong
AU - Yan, Qing
AU - Zhao, Junhai
AU - Zhang, Changguang
AU - Wang, Jintai
PY - 2020
DA - 2020/09/04
TI - Ultimate Bearing Capacity of Strip Foundations in Unsaturated Soils considering the Intermediate Principal Stress Effect
SP - 8854552
VL - 2020
AB - The reasonable determination of ultimate bearing capacity is crucial to an optimal design of shallow foundations. Soils surrounding shallow foundations are commonly located above the water table and are thus in an unsaturated state. The intermediate principal stress has an improving effect on the unsaturated soil strength. In this study, the ultimate bearing capacity formulation of strip foundations in unsaturated soils is presented by using Terzaghi’s theory. The unified shear strength equation of unsaturated soils under a plane strain condition is utilized to capture the intermediate principal stress effect. Furthermore, two profiles of matric suction are considered and a hyperbolic function of the friction angle related to matric suction (φb) is adopted to describe strength nonlinearity. The validity of this study is demonstrated by comparing it with model tests and a theoretical solution reported in the literature. Finally, parameter studies are conducted to investigate the effects of intermediate principal stress, matric suction, and base roughness on the ultimate bearing capacity of strip foundations. Besides, the effect of strength nonlinearity is discussed with two methods representing the angle φb.
SN - 1687-8086
UR - https://doi.org/10.1155/2020/8854552
DO - 10.1155/2020/8854552
JF - Advances in Civil Engineering
PB - Hindawi
KW -
ER -